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• 1. [Article] Mosier Valley Groundwater Conservation Action Plan: Concept Paper

  Abstract -- This concept paper attempts to describe a groundwater conservation action plan to reverse the overdraft of groundwater in the Mosier Valley, allowing for sustainable use of the resource, and ...

  Citation × Citation Citation Abstract Copy Title: Mosier Valley Groundwater Conservation Action Plan: Concept Paper Abstract -- This concept paper attempts to describe a groundwater conservation action plan to reverse the overdraft of groundwater in the Mosier Valley, allowing for sustainable use of the resource, and conservation of all natural resource values in the Mosier Valley, including homeownership, agriculture, stream flows, and fish and wildlife habitat. Title: Mosier Valley Groundwater Conservation Action Plan: Concept Paper Abstract -- This concept paper attempts to describe a groundwater conservation action plan to reverse the overdraft of groundwater in the Mosier Valley, allowing for sustainable use of the resource, and conservation of all natural resource values in the Mosier Valley, including homeownership, agriculture, stream flows, and fish and wildlife habitat. Close

• 2. [Article] Wildlife and Vehicle Collision Hotspots - Lines

  Abstract -- High frequency wildlife carcass incidents (from Oregon Department of Transportation dispatch records of carcass reports, 1995 - 2006, all state highways.) Includes only records of deer and ...

  Citation × Citation Citation Abstract Copy Title: Wildlife and Vehicle Collision Hotspots - Lines Abstract -- High frequency wildlife carcass incidents (from Oregon Department of Transportation dispatch records of carcass reports, 1995 - 2006, all state highways.) Includes only records of deer and elk, with reported precision of >= 0.5 mile. Hot spots were derived from a kernel density probability analysis, and mapped using the Jenks Natural Breaks method to rank the values into five continuous categories. Model parameters include 100x100 grid cells and a 5280 foot search radius. Title: Wildlife and Vehicle Collision Hotspots - Lines Abstract -- High frequency wildlife carcass incidents (from Oregon Department of Transportation dispatch records of carcass reports, 1995 - 2006, all state highways.) Includes only records of deer and elk, with reported precision of >= 0.5 mile. Hot spots were derived from a kernel density probability analysis, and mapped using the Jenks Natural Breaks method to rank the values into five continuous categories. Model parameters include 100x100 grid cells and a 5280 foot search radius. Close

• 3. [Article] Wildlife and Vehicle Collision Hotspots - Points

  Abstract -- High frequency wildlife carcass incidents (from Oregon Department of Transportation dispatch records of carcass reports, 1995 - 2006, all state highways.) Includes only records of deer and ...

  Citation × Citation Citation Abstract Copy Title: Wildlife and Vehicle Collision Hotspots - Points Abstract -- High frequency wildlife carcass incidents (from Oregon Department of Transportation dispatch records of carcass reports, 1995 - 2006, all state highways.) Includes only records of deer and elk, with reported precision of >= 0.5 mile. Hot spots were derived from a kernel density probability analysis, and mapped using the Jenks Natural Breaks method to rank the values into five continuous categories. Model parameters include 100x100 grid cells and a 5280 foot search radius. Title: Wildlife and Vehicle Collision Hotspots - Points Abstract -- High frequency wildlife carcass incidents (from Oregon Department of Transportation dispatch records of carcass reports, 1995 - 2006, all state highways.) Includes only records of deer and elk, with reported precision of >= 0.5 mile. Hot spots were derived from a kernel density probability analysis, and mapped using the Jenks Natural Breaks method to rank the values into five continuous categories. Model parameters include 100x100 grid cells and a 5280 foot search radius. Close

• 4. [Image] A conservation strategy for the northern spotted owl

  	ill., maps; Shipping list no.: 90-263-P; "May 1990."; Includes bibliographical references
  	Citation × Citation Citation Abstract Copy Title: A conservation strategy for the northern spotted owl Author: Thomas, Jack Ward Year: 1990, 2010 ill., maps; Shipping list no.: 90-263-P; "May 1990."; Includes bibliographical references Title: A conservation strategy for the northern spotted owl Author: Thomas, Jack Ward Year: 1990, 2010 ill., maps; Shipping list no.: 90-263-P; "May 1990."; Includes bibliographical references Close

• 5. [Image] An investigation into the comparative utility of color infrared aerial photography and LANDSAT data for detailed surface cover type mapping within Crater Lake National Park, Oregon

  	ill., maps; Typescript (photocopy); Thesis (Ph. D.)--Oregon State University, 1978; Includes bibliographical references
  	Citation × Citation Citation Abstract Copy Title: An investigation into the comparative utility of color infrared aerial photography and LANDSAT data for detailed surface cover type mapping within Crater Lake National Park, Oregon Author: Walsh, Stephen Joseph, Year: 1977, 2009 ill., maps; Typescript (photocopy); Thesis (Ph. D.)--Oregon State University, 1978; Includes bibliographical references Title: An investigation into the comparative utility of color infrared aerial photography and LANDSAT data for detailed surface cover type mapping within Crater Lake National Park, Oregon Author: Walsh, Stephen Joseph, Year: 1977, 2009 ill., maps; Typescript (photocopy); Thesis (Ph. D.)--Oregon State University, 1978; Includes bibliographical references Close

• 6. [Image] Vegetative ecology of a montane mire, Crater Lake National Park, Oregon

  	ill., maps (1 col.); Typescript (photocopy); Thesis (M.S.)--Oregon State University, 1980; Includes bibliographical references
  	Citation × Citation Citation Abstract Copy Title: Vegetative ecology of a montane mire, Crater Lake National Park, Oregon Author: Seyer, Susan C. Year: 1979, 2009 ill., maps (1 col.); Typescript (photocopy); Thesis (M.S.)--Oregon State University, 1980; Includes bibliographical references Title: Vegetative ecology of a montane mire, Crater Lake National Park, Oregon Author: Seyer, Susan C. Year: 1979, 2009 ill., maps (1 col.); Typescript (photocopy); Thesis (M.S.)--Oregon State University, 1980; Includes bibliographical references Close

• 7. [Image] Annual project history: Klamath Project, Oregon-California, 1957

  	INTRODUCTION AND GENERAL General Description of the Project Location. The Klamath Project is in the Upper Klamath River Basin, east of the Cascade Range. It is located in Klamath County, Oregon, and ...
  	Citation × Citation Citation Abstract Copy Title: Annual project history: Klamath Project, Oregon-California, 1957 Author: United States. Bureau of Reclamation Year: 1957, 2008, 2006 INTRODUCTION AND GENERAL General Description of the Project Location. The Klamath Project is in the Upper Klamath River Basin, east of the Cascade Range. It is located in Klamath County, Oregon, and in Modoc and Siskiyou Counties of California. Project headquarters is located at the principal city of Klamath Falls, Oregon, which has a population of about 35>700, including suburbs. Smaller towns on the project in Oregon are Merrill, Malin, and Bonanza. The town of Tulelake, California, was established in 1931 near the center of the Tule Lake Division. Climate. The mean temperature for the wannest month is 630 F. The coldest month has mean temperature of 29? F. Summer nights are cool. The annual rainfall is about 13 inches, of which about 3?-inches fall during the growing season of 90 to 130 days. Topography, soils, and crops. The project area is about ^-,100 feet elevation above sea level. The surface topography is generally smooth and flat for the large areas of lake bottom, and gently sloping on the higher lands. Peat and muck soils are common in the recent lake bottoms. Soils vary from sandy loam to clay on other parts of the project. The principal crops grown are alfalfa, malting and feed barley, potatoes, clover seed, and irrigated pasture and other forage. Stock raising is an important enterprise. Industry and transportation. Farming and lumbering each provide the major portion of the economy of the Basin. Three major railroad lines, one major highway and many secondary highways, and two airlines serve the project area. Plan and purpose. The project serves 211,000 acres. The water supply is provided by two main water courses, Klamath River and Lost River and their tributaries. Besides storing, diverting, and distributing water for irrigation, project facilities have reclaimed by drainage large areas formerly inundated by Lower Klamath and Tule Lakes* Flood waters of Lost River, which terminates in Tule Lake, are diverted to the Klamath River through the Lost River Diversion Channel. This channel is also used to carry irrigation water in the opposite direction in the summertime. Another principal function of the project is water-level control for the Tule Lake and Lower Klamath Lake National Wildlife Refuges. Upper Klamath Lake on the Klamath River is the principal storage reservoir, having an active capacity of 52U,800 acre-feet. It is controlled by Link River Dam constructed, maintained, and operated INTRODUCTION AND GENERAL (Continued) General Description of the Project (Cont.) by The California Oregon Power Company under an agreement with the project whereby irrigation requirements and rights are protected. The Main, Lower Klamath, and Tule Lake Divisions are served from this source, Gerber Reservoir on Miller Creek and Clear Lake Reservoir on Lost River provide flood control for the Tule Lake Division and an irrigation supply for the Langell Valley Division. Their active storage capacities are 9*^300 acre-feet and 513*300 acre-feet, respectively. Federally-financed project works also include the diversion, distribution, and drainage systems for the Main and Tule Lake Divisions; the diversion dam and main canals for the Langell Valley Division; and drainage outlets for the Lower Klamath and Tule Lake Divisions. Title: Annual project history: Klamath Project, Oregon-California, 1957 Author: United States. Bureau of Reclamation Year: 1957, 2008, 2006 INTRODUCTION AND GENERAL General Description of the Project Location. The Klamath Project is in the Upper Klamath River Basin, east of the Cascade Range. It is located in Klamath County, Oregon, and in Modoc and Siskiyou Counties of California. Project headquarters is located at the principal city of Klamath Falls, Oregon, which has a population of about 35>700, including suburbs. Smaller towns on the project in Oregon are Merrill, Malin, and Bonanza. The town of Tulelake, California, was established in 1931 near the center of the Tule Lake Division. Climate. The mean temperature for the wannest month is 630 F. The coldest month has mean temperature of 29? F. Summer nights are cool. The annual rainfall is about 13 inches, of which about 3?-inches fall during the growing season of 90 to 130 days. Topography, soils, and crops. The project area is about ^-,100 feet elevation above sea level. The surface topography is generally smooth and flat for the large areas of lake bottom, and gently sloping on the higher lands. Peat and muck soils are common in the recent lake bottoms. Soils vary from sandy loam to clay on other parts of the project. The principal crops grown are alfalfa, malting and feed barley, potatoes, clover seed, and irrigated pasture and other forage. Stock raising is an important enterprise. Industry and transportation. Farming and lumbering each provide the major portion of the economy of the Basin. Three major railroad lines, one major highway and many secondary highways, and two airlines serve the project area. Plan and purpose. The project serves 211,000 acres. The water supply is provided by two main water courses, Klamath River and Lost River and their tributaries. Besides storing, diverting, and distributing water for irrigation, project facilities have reclaimed by drainage large areas formerly inundated by Lower Klamath and Tule Lakes* Flood waters of Lost River, which terminates in Tule Lake, are diverted to the Klamath River through the Lost River Diversion Channel. This channel is also used to carry irrigation water in the opposite direction in the summertime. Another principal function of the project is water-level control for the Tule Lake and Lower Klamath Lake National Wildlife Refuges. Upper Klamath Lake on the Klamath River is the principal storage reservoir, having an active capacity of 52U,800 acre-feet. It is controlled by Link River Dam constructed, maintained, and operated INTRODUCTION AND GENERAL (Continued) General Description of the Project (Cont.) by The California Oregon Power Company under an agreement with the project whereby irrigation requirements and rights are protected. The Main, Lower Klamath, and Tule Lake Divisions are served from this source, Gerber Reservoir on Miller Creek and Clear Lake Reservoir on Lost River provide flood control for the Tule Lake Division and an irrigation supply for the Langell Valley Division. Their active storage capacities are 9*^300 acre-feet and 513*300 acre-feet, respectively. Federally-financed project works also include the diversion, distribution, and drainage systems for the Main and Tule Lake Divisions; the diversion dam and main canals for the Langell Valley Division; and drainage outlets for the Lower Klamath and Tule Lake Divisions. Close

• 8. [Image] Annual project history: Klamath Project, Oregon-California, 1958

  	INTRODUCTION AND GENERAL Genex*al Description of the Project Location. The Klamath Project is in the Upper Klamath River Basin, east of the Cascade Range. It is located in Klamath Comity, Oregon, ...
  	Citation × Citation Citation Abstract Copy Title: Annual project history: Klamath Project, Oregon-California, 1958 Author: United States. Bureau of Reclamation Year: 1958, 2008, 2006 INTRODUCTION AND GENERAL Genex*al Description of the Project Location. The Klamath Project is in the Upper Klamath River Basin, east of the Cascade Range. It is located in Klamath Comity, Oregon, and in Modoc and Siskiyou Counties of California. Project headquarters is located at the principal city of Klamath Falls, Oregon, which has a population of about 3&>^00, including suburbs. Smaller towns on the project in Oregon are Merrill, Malin, and Bonanza. The town of Tulelake, California, was established in 1931 near the center of the Tule Lake Division. Climate ? The mean temperature for the warmest month is 630 F. The coldest month has raez.n temperature of 29? F. Summer nights are cool. The annual rainfall is about 13 inches, of which about 3^ inches fall during the growing season of 90 to 130 days. Topography, soils, and crops. The project area is about U,100 feet elevation above sea level. The surface topography is generally smooth and flat for the large areas of lake bottom, and gently sloping on the higher lands? Peat and muck soils are common in the recent lake bottoms. Soils vary from sandy loam to clay on other parts of the project. The principal crops grown are alfalfa, malting and feed barley, potatoes, clover seed, and irrigated pasture and other forage. Stock raising is an important enterprise. Industry and transportation. Farming and lumbering each provide the major portion of the economy of the Basin. Three major railroad lines, one major highway and many secondary highways, and two airlines serve the project area. Plan and purpose. In 1958 the project provided irrigation service to 21^,500 acres. The water supply is provided by two main water courses, Klamath River and Lost River and their tributaries. Besides storing, diverting, and distributing water for irrigation, project facilities have reclaimed by drainage large areas formerly inundated by Lower Klamath and Tule Lakes. Flood waters of Lost River, which terminates In Tule Lake, are diverted to the Klamath River through the Lost River Diversion Channel. This channel is also used to carry irrigation water in the opposite direction in the summertime. Another principal function of the project is water-level control for the Tule Lake and Lower Klamath Lake National Wildlife Refuges. DTERODUCTIOH AND GBNKRAL (Continued) General Description of the Project (Cont.) Upper Klamath Lake on the Klamath River is the principal storage reservoir, having an active capacity of 52^,800 acre-feet. It is controlled by Link River Dam constructed, maintained, and operated by The California Oregon Power Company under an agreement with the project whereby irrigation requirements and rights are protected. The Main, Lower Klamath, and Tule Lake Divisions are served from this source. Gerber Reservoir on Miller Creel; and Clear Lake Reservoir on Lost River provide flood control for the Tule Lake Division and an irrigation supply for the Langell Valley Division. Their active storage capacities are 9*b3OO acre-feet and 513*300 acre-feet, respectively. Federally-financed project works also include the diversion, distribution, and drainage systems for the Main and Tule Lake Divisions; the diversion darn and main canals for the Langell Valley Division; and drainage outlets for the Lower Klamath and Tule Lake Divisions? Title: Annual project history: Klamath Project, Oregon-California, 1958 Author: United States. Bureau of Reclamation Year: 1958, 2008, 2006 INTRODUCTION AND GENERAL Genex*al Description of the Project Location. The Klamath Project is in the Upper Klamath River Basin, east of the Cascade Range. It is located in Klamath Comity, Oregon, and in Modoc and Siskiyou Counties of California. Project headquarters is located at the principal city of Klamath Falls, Oregon, which has a population of about 3&>^00, including suburbs. Smaller towns on the project in Oregon are Merrill, Malin, and Bonanza. The town of Tulelake, California, was established in 1931 near the center of the Tule Lake Division. Climate ? The mean temperature for the warmest month is 630 F. The coldest month has raez.n temperature of 29? F. Summer nights are cool. The annual rainfall is about 13 inches, of which about 3^ inches fall during the growing season of 90 to 130 days. Topography, soils, and crops. The project area is about U,100 feet elevation above sea level. The surface topography is generally smooth and flat for the large areas of lake bottom, and gently sloping on the higher lands? Peat and muck soils are common in the recent lake bottoms. Soils vary from sandy loam to clay on other parts of the project. The principal crops grown are alfalfa, malting and feed barley, potatoes, clover seed, and irrigated pasture and other forage. Stock raising is an important enterprise. Industry and transportation. Farming and lumbering each provide the major portion of the economy of the Basin. Three major railroad lines, one major highway and many secondary highways, and two airlines serve the project area. Plan and purpose. In 1958 the project provided irrigation service to 21^,500 acres. The water supply is provided by two main water courses, Klamath River and Lost River and their tributaries. Besides storing, diverting, and distributing water for irrigation, project facilities have reclaimed by drainage large areas formerly inundated by Lower Klamath and Tule Lakes. Flood waters of Lost River, which terminates In Tule Lake, are diverted to the Klamath River through the Lost River Diversion Channel. This channel is also used to carry irrigation water in the opposite direction in the summertime. Another principal function of the project is water-level control for the Tule Lake and Lower Klamath Lake National Wildlife Refuges. DTERODUCTIOH AND GBNKRAL (Continued) General Description of the Project (Cont.) Upper Klamath Lake on the Klamath River is the principal storage reservoir, having an active capacity of 52^,800 acre-feet. It is controlled by Link River Dam constructed, maintained, and operated by The California Oregon Power Company under an agreement with the project whereby irrigation requirements and rights are protected. The Main, Lower Klamath, and Tule Lake Divisions are served from this source. Gerber Reservoir on Miller Creel; and Clear Lake Reservoir on Lost River provide flood control for the Tule Lake Division and an irrigation supply for the Langell Valley Division. Their active storage capacities are 9*b3OO acre-feet and 513*300 acre-feet, respectively. Federally-financed project works also include the diversion, distribution, and drainage systems for the Main and Tule Lake Divisions; the diversion darn and main canals for the Langell Valley Division; and drainage outlets for the Lower Klamath and Tule Lake Divisions? Close

• 9. [Image] Annual project history: Klamath Project, Oregon-California, 1962

  	Ill., maps (some color), photographs; Includes fiscal year financials, maps, photographs, agricultural economics and crop yield, some grazing financial information with cost of water usage, tables for ...
  	Citation × Citation Citation Abstract Copy Title: Annual project history: Klamath Project, Oregon-California, 1962 Author: United States. Bureau of Reclamation Year: 1962, 2008, 2006 Ill., maps (some color), photographs; Includes fiscal year financials, maps, photographs, agricultural economics and crop yield, some grazing financial information with cost of water usage, tables for irrigation and drainage and water storage and distributions, list of steam gaging stations, weather conditions, list of evaporation stations, quality of irrigation water at pumping plants, etc.; Title covers: calendar years for 1954-1962; Description is based on: Annual project history: Klamath Project, Oregon-California 1954; Dates of the beginning year(s) of publication are derived from May 1, 1903 to December 31, 1912, History of the Klamath Project and from the volume information on later volumes (v. 35) Klamath District and Klamath Project annual history for 1945, dated December 1, 1946 Title: Annual project history: Klamath Project, Oregon-California, 1962 Author: United States. Bureau of Reclamation Year: 1962, 2008, 2006 Ill., maps (some color), photographs; Includes fiscal year financials, maps, photographs, agricultural economics and crop yield, some grazing financial information with cost of water usage, tables for irrigation and drainage and water storage and distributions, list of steam gaging stations, weather conditions, list of evaporation stations, quality of irrigation water at pumping plants, etc.; Title covers: calendar years for 1954-1962; Description is based on: Annual project history: Klamath Project, Oregon-California 1954; Dates of the beginning year(s) of publication are derived from May 1, 1903 to December 31, 1912, History of the Klamath Project and from the volume information on later volumes (v. 35) Klamath District and Klamath Project annual history for 1945, dated December 1, 1946 Close

• 10. [Image] Geothermal Exploration of the Puga and Chumathang Geothermal Fields, Ladakh, India

  	Puga and Chumathang Geothermal fields are situated near the collided junction of the Indian and Asian Crystal plates and thermal activity in these fields is attributed to the widespread igneous activity ...
  	Citation × Citation Citation Abstract Copy Title: Geothermal Exploration of the Puga and Chumathang Geothermal Fields, Ladakh, India Author: Shanker, R. Puga and Chumathang Geothermal fields are situated near the collided junction of the Indian and Asian Crystal plates and thermal activity in these fields is attributed to the widespread igneous activity of Upper Cretaceous to late Tertiary age. A deep suture zone, recognised in between these two fields and the associated faults provide channels for the upward migration of the thermal fluids. High concentrations of Cl, F, Si02, B, Na, Li, Rb, Cs in thermal fluids signify contribution of magmatic bodies towards heat, and fluid supply. These fields are characterized by high heat flow conditions (13 HFU), abnormal shallow geothermal gradients (0.7 - 2.5 c/m) , high base temperature (220 - 270 C) as obtained by alkalia and Ne-K-Ca geothermometry and low resistivity values (2-20 ohm.m.). Low resistivity zones occupy on an area of three and one sq.km. and extend down to maximum depths of 300 m. and 130 m. at Puga and Chumathang respectively. Shallow drilling (28-130 m.) has established the existence of wet steam reservoirs under moderate pressure (2-4.5 kg/cm^2). Hot fluid (95-135 C) discharges from eight flowing wells ranged from 7.5 to 30 t/h. These thermal fluids are stored in the partly consolidated fluvioglacial deposits of Quarternary to Recent age. The occurrence of a limestone layer in the country rock at Puga brightens the prospects of getting good reservoir at depth. In both these fields two aquifers have been recognised, each having sizeable potential for retaining ground water. The ground water recharge is mainly through snow melt from glaciers in the case of Puga field and principally from Indus river in the case of Chumathangfield Title: Geothermal Exploration of the Puga and Chumathang Geothermal Fields, Ladakh, India Author: Shanker, R. Puga and Chumathang Geothermal fields are situated near the collided junction of the Indian and Asian Crystal plates and thermal activity in these fields is attributed to the widespread igneous activity of Upper Cretaceous to late Tertiary age. A deep suture zone, recognised in between these two fields and the associated faults provide channels for the upward migration of the thermal fluids. High concentrations of Cl, F, Si02, B, Na, Li, Rb, Cs in thermal fluids signify contribution of magmatic bodies towards heat, and fluid supply. These fields are characterized by high heat flow conditions (13 HFU), abnormal shallow geothermal gradients (0.7 - 2.5 c/m) , high base temperature (220 - 270 C) as obtained by alkalia and Ne-K-Ca geothermometry and low resistivity values (2-20 ohm.m.). Low resistivity zones occupy on an area of three and one sq.km. and extend down to maximum depths of 300 m. and 130 m. at Puga and Chumathang respectively. Shallow drilling (28-130 m.) has established the existence of wet steam reservoirs under moderate pressure (2-4.5 kg/cm^2). Hot fluid (95-135 C) discharges from eight flowing wells ranged from 7.5 to 30 t/h. These thermal fluids are stored in the partly consolidated fluvioglacial deposits of Quarternary to Recent age. The occurrence of a limestone layer in the country rock at Puga brightens the prospects of getting good reservoir at depth. In both these fields two aquifers have been recognised, each having sizeable potential for retaining ground water. The ground water recharge is mainly through snow melt from glaciers in the case of Puga field and principally from Indus river in the case of Chumathangfield Close

• 11. [Image] Field Electrochemical Measurements of Corrosion Characteristics of Materials in Hypersaline Geothermal Brine

  	A flow cell (with appropriate accessories) was developed for use in short-term testing of the corrosion behavior of materials in approximately 100{sup 0}C, hypersaline geothermal brine. The apparatus was ...
  	Citation × Citation Citation Abstract Copy Title: Field Electrochemical Measurements of Corrosion Characteristics of Materials in Hypersaline Geothermal Brine Author: Harrar, J.E. Year: 1977 A flow cell (with appropriate accessories) was developed for use in short-term testing of the corrosion behavior of materials in approximately 100{sup 0}C, hypersaline geothermal brine. The apparatus was designed to accommodate commercial (Petrolite) corrosion measurement equipment and conducted experiments on-line at the Lawrence Livermore Laboratory Test Station in the Salton Sea Geothermal Field. The apparatus also permitted direct readings of corrosion potentials, solution redox potential (E{sub h}), brine flow rate, pH, and temperature. Estimates of general corrosion rates were obtained by the linear polarization resistance technique and from measurements of complete potentiodynamic polarization curves. The latter also afforded predictions of pitting susceptibilities of active-passive type materials. Twenty-two alloys (with various heat treatments) were tested and readily grouped according to general corrosion resistances in acidified hypersaline (approximately 4 M chloride) brine. Especially promising in regard to corrosion resistance-vs-cost is the series of low Cr--Mo steels. Prescaling of materials in unacidified (pH approximately 5.7) brine prior to exposure to acidified (pH 2 to 4.5) brine was found to be beneficial in reducing corrosion rates at 100{sup 0}C Title: Field Electrochemical Measurements of Corrosion Characteristics of Materials in Hypersaline Geothermal Brine Author: Harrar, J.E. Year: 1977 A flow cell (with appropriate accessories) was developed for use in short-term testing of the corrosion behavior of materials in approximately 100{sup 0}C, hypersaline geothermal brine. The apparatus was designed to accommodate commercial (Petrolite) corrosion measurement equipment and conducted experiments on-line at the Lawrence Livermore Laboratory Test Station in the Salton Sea Geothermal Field. The apparatus also permitted direct readings of corrosion potentials, solution redox potential (E{sub h}), brine flow rate, pH, and temperature. Estimates of general corrosion rates were obtained by the linear polarization resistance technique and from measurements of complete potentiodynamic polarization curves. The latter also afforded predictions of pitting susceptibilities of active-passive type materials. Twenty-two alloys (with various heat treatments) were tested and readily grouped according to general corrosion resistances in acidified hypersaline (approximately 4 M chloride) brine. Especially promising in regard to corrosion resistance-vs-cost is the series of low Cr--Mo steels. Prescaling of materials in unacidified (pH approximately 5.7) brine prior to exposure to acidified (pH 2 to 4.5) brine was found to be beneficial in reducing corrosion rates at 100{sup 0}C Close

• 12. [Image] Geopressured Energy Resource Evaluation

  	The geopressured aquifers that extend along the northern Gulf of Mexico are a large, perhaps the largest, potential source of geothermal energy and natural gas in the US. Because of the high cost of completing ...
  	Citation × Citation Citation Abstract Copy Title: Geopressured Energy Resource Evaluation Author: Samuels, G. Year: 1979 The geopressured aquifers that extend along the northern Gulf of Mexico are a large, perhaps the largest, potential source of geothermal energy and natural gas in the US. Because of the high cost of completing wells into these formations and their relatively low temperatures (200 to 400 F), the utilization of the geothermal energy will be highly depend on, and of secondary importance to, the value of the methane. The economics of extracting either the geothermal energy or natural gas from these aquifers does not look promising. The combined requirements of high well flow rates (40,000 bbl/day), long life (20 years), and the necessity for close well spacing to minimize the cost of the collection system may be incompatible with the actual characteristics of the reservoirs. These factors place such stringent requirements on the reservoir size, permeability, and compressibility, or specific storage coefficient, that the number of promising production areas may be severely limited Title: Geopressured Energy Resource Evaluation Author: Samuels, G. Year: 1979 The geopressured aquifers that extend along the northern Gulf of Mexico are a large, perhaps the largest, potential source of geothermal energy and natural gas in the US. Because of the high cost of completing wells into these formations and their relatively low temperatures (200 to 400 F), the utilization of the geothermal energy will be highly depend on, and of secondary importance to, the value of the methane. The economics of extracting either the geothermal energy or natural gas from these aquifers does not look promising. The combined requirements of high well flow rates (40,000 bbl/day), long life (20 years), and the necessity for close well spacing to minimize the cost of the collection system may be incompatible with the actual characteristics of the reservoirs. These factors place such stringent requirements on the reservoir size, permeability, and compressibility, or specific storage coefficient, that the number of promising production areas may be severely limited Close

• 13. [Image] Project history: Klamath Project, Oregon-California, 1964

  	Ill., maps (some color), photographs; Includes financial documents, organization chart, photographs, maps, water quality reports, and agricultural economics; Includes index; Title covers: calendar years ...
  	Citation × Citation Citation Abstract Copy Title: Project history: Klamath Project, Oregon-California, 1964 Author: United States. Bureau of Reclamation Year: 1964, 2008, 2006 Ill., maps (some color), photographs; Includes financial documents, organization chart, photographs, maps, water quality reports, and agricultural economics; Includes index; Title covers: calendar years for 1963-; Some issues are missing.; Description is based on: Project history: Klamath Project, Oregon-California 1963; Dates of the beginning year(s) of publication are derived from the May 1, 1903 to December 31, 1912, History of the Klamath Project and from the volume information on later volumes (v. 35) Klamath District and Klamath Project annual history for 1945, dated December 1, 1946 Title: Project history: Klamath Project, Oregon-California, 1964 Author: United States. Bureau of Reclamation Year: 1964, 2008, 2006 Ill., maps (some color), photographs; Includes financial documents, organization chart, photographs, maps, water quality reports, and agricultural economics; Includes index; Title covers: calendar years for 1963-; Some issues are missing.; Description is based on: Project history: Klamath Project, Oregon-California 1963; Dates of the beginning year(s) of publication are derived from the May 1, 1903 to December 31, 1912, History of the Klamath Project and from the volume information on later volumes (v. 35) Klamath District and Klamath Project annual history for 1945, dated December 1, 1946 Close

• 14. [Image] Utilization of geothermal energy for methane production for J. A. Albertson Land and Cattle Company

  	To utilize the geothermal energy in the area of its 30,000-head cattle feedlot, J.A. Albertson Land and Cattle Co. is considering the development of an integrated geothermal/bioconversion system that would ...
  	Citation × Citation Citation Abstract Copy Title: Utilization of geothermal energy for methane production for J. A. Albertson Land and Cattle Company Author: Bissell, R.R. Year: 1980 To utilize the geothermal energy in the area of its 30,000-head cattle feedlot, J.A. Albertson Land and Cattle Co. is considering the development of an integrated geothermal/bioconversion system that would use the cattle manure as a feedstock for an anaerobic-digestion plant to produce methane plus a digester-residue cattle-feed supplement. The feedlot lies within a high-temperature gradient and heat-flow area associated with the Western Snake River basin in Malheur Co., Oregon. The three digesters designed for the process will operate mesophilically (at 98/sup 0/F) with a 20-day retention time. To make up the digesters' heat losses, the geothermal water source will need to be about 135/sup 0/F and have a flow rate of 120-240 gpm, depending on the size ultimately selected for the facility. If the digester residue replaces alfalfa hay in the cattle's current rations, its value will amount to $1.15 million/yr. Burning the methane in engine/generator sets would produce 985-1970 kW of electric power that could be either sold or used as a day-to-day substitute for the geothermal heat. An economic analysis of the system is presented; DOE/ET/27230-T2 Title: Utilization of geothermal energy for methane production for J. A. Albertson Land and Cattle Company Author: Bissell, R.R. Year: 1980 To utilize the geothermal energy in the area of its 30,000-head cattle feedlot, J.A. Albertson Land and Cattle Co. is considering the development of an integrated geothermal/bioconversion system that would use the cattle manure as a feedstock for an anaerobic-digestion plant to produce methane plus a digester-residue cattle-feed supplement. The feedlot lies within a high-temperature gradient and heat-flow area associated with the Western Snake River basin in Malheur Co., Oregon. The three digesters designed for the process will operate mesophilically (at 98/sup 0/F) with a 20-day retention time. To make up the digesters' heat losses, the geothermal water source will need to be about 135/sup 0/F and have a flow rate of 120-240 gpm, depending on the size ultimately selected for the facility. If the digester residue replaces alfalfa hay in the cattle's current rations, its value will amount to $1.15 million/yr. Burning the methane in engine/generator sets would produce 985-1970 kW of electric power that could be either sold or used as a day-to-day substitute for the geothermal heat. An economic analysis of the system is presented; DOE/ET/27230-T2 Close

• 15. [Image] Development of the high-temperature redox electrode. Interim report ending March 1980

  	The oxidation-reduction (known as redox) electrode was studied in a pH range corresponding to that found in a CO/sub 2/-silicate buffered system at temperatures ranging from 100 to 250/sup 0/C. Oxidizing ...
  	Citation × Citation Citation Abstract Copy Title: Development of the high-temperature redox electrode. Interim report ending March 1980 Author: Danielson, M.J. Year: 1980 The oxidation-reduction (known as redox) electrode was studied in a pH range corresponding to that found in a CO/sub 2/-silicate buffered system at temperatures ranging from 100 to 250/sup 0/C. Oxidizing conditions were created by injecting oxygen; the greatest reducing conditions, by using hydrogen. The sulfur system (H/sub 2/S, HS/sup -/, S/sup 2/) was not examined at this time, but future work will include this system since it is an important component of the geothermal brine. Both a platinized platinum (Pt-Pt) and a bare platinum (Pt-foil) electrode respond to the redox environment. The response does not appear to indicate thermodynamic equilibrium with the chemical environment; instead a mixed potential response is indicated. The difference in potential between a strong oxidizing environment (0.4-ppM O/sub 2/) and a strong reducing environment (0.5-atm H/sub 2/) is typically > 1 volt at all temperatures. The magnitude of this response makes the platinum electrode a suitable sensor for continuous monitoring of the geothermal environment for oxygen intrusions. The platinized platinum redox electrode is superior to the bare platinum electrode; PNL-3377 Title: Development of the high-temperature redox electrode. Interim report ending March 1980 Author: Danielson, M.J. Year: 1980 The oxidation-reduction (known as redox) electrode was studied in a pH range corresponding to that found in a CO/sub 2/-silicate buffered system at temperatures ranging from 100 to 250/sup 0/C. Oxidizing conditions were created by injecting oxygen; the greatest reducing conditions, by using hydrogen. The sulfur system (H/sub 2/S, HS/sup -/, S/sup 2/) was not examined at this time, but future work will include this system since it is an important component of the geothermal brine. Both a platinized platinum (Pt-Pt) and a bare platinum (Pt-foil) electrode respond to the redox environment. The response does not appear to indicate thermodynamic equilibrium with the chemical environment; instead a mixed potential response is indicated. The difference in potential between a strong oxidizing environment (0.4-ppM O/sub 2/) and a strong reducing environment (0.5-atm H/sub 2/) is typically > 1 volt at all temperatures. The magnitude of this response makes the platinum electrode a suitable sensor for continuous monitoring of the geothermal environment for oxygen intrusions. The platinized platinum redox electrode is superior to the bare platinum electrode; PNL-3377 Close

• 16. [Image] Annual Report on the Project to Design and Experimentally Test an Improved Geothermal Drill Bit

  	Progress is reported in a research and development program to design, build, and test an improved geothermal drill bit. The major tasks of the Phase I effort are entitled: failure mechanisms of existing ...
  	Citation × Citation Citation Abstract Copy Title: Annual Report on the Project to Design and Experimentally Test an Improved Geothermal Drill Bit Author: Barker, L.M. Year: 1976 Progress is reported in a research and development program to design, build, and test an improved geothermal drill bit. The major tasks of the Phase I effort are entitled: failure mechanisms of existing bits; new steels and new bearing design; and new seals and lubricants. It appears that a significant gain in drill-bit life can be attained by the use of higher-temperature steels which retain more hardness at temperatures above 260/sup 0/C (500/sup 0/F). Such steels are available, and two research bits of high-temperature steels were made and will shortly be tested in a laboratory-simulated full-scale geothermal drilling environment. Two control bits of the same design, but made with conventional drill bit steels, were also obtained for identical laboratory test runs, so that the performance of the research bits can be meaningfully assessed. Base-line properties of the steels, such as hardness and fracture toughness as functions of temperature, are being measured to further assess the value of the high-temperature steels selected for the research bits. A geothermal test vessel was designed and fabricated in which the full-scale drill bits will be tested. The vessel is capable of temperature to 427/sup 0/C (800/sup 0/F) and pressures to 35 MPa (5,000 psi). Seal and lubrication designs were studied, and the state of the art in high-temperature seals and lubricants was assessed. Some candidate seals and lubricants have been obtained for testing, and others are being procured. In addition, a seal test vessel has been designed and will soon be completed which can simulate the geothermal drilling environment in full-scale testing of seal and lubricant designs and materials. (JGB) Title: Annual Report on the Project to Design and Experimentally Test an Improved Geothermal Drill Bit Author: Barker, L.M. Year: 1976 Progress is reported in a research and development program to design, build, and test an improved geothermal drill bit. The major tasks of the Phase I effort are entitled: failure mechanisms of existing bits; new steels and new bearing design; and new seals and lubricants. It appears that a significant gain in drill-bit life can be attained by the use of higher-temperature steels which retain more hardness at temperatures above 260/sup 0/C (500/sup 0/F). Such steels are available, and two research bits of high-temperature steels were made and will shortly be tested in a laboratory-simulated full-scale geothermal drilling environment. Two control bits of the same design, but made with conventional drill bit steels, were also obtained for identical laboratory test runs, so that the performance of the research bits can be meaningfully assessed. Base-line properties of the steels, such as hardness and fracture toughness as functions of temperature, are being measured to further assess the value of the high-temperature steels selected for the research bits. A geothermal test vessel was designed and fabricated in which the full-scale drill bits will be tested. The vessel is capable of temperature to 427/sup 0/C (800/sup 0/F) and pressures to 35 MPa (5,000 psi). Seal and lubrication designs were studied, and the state of the art in high-temperature seals and lubricants was assessed. Some candidate seals and lubricants have been obtained for testing, and others are being procured. In addition, a seal test vessel has been designed and will soon be completed which can simulate the geothermal drilling environment in full-scale testing of seal and lubricant designs and materials. (JGB) Close

• 17. [Image] Distribution and habitat use of bull trout following the removal of nonnative brook trout

  	ill.; Printout; Thesis (M.S.)--Oregon State University, 2006; Includes bibliographical references (leaves 55-61)
  	Citation × Citation Citation Abstract Copy Title: Distribution and habitat use of bull trout following the removal of nonnative brook trout Author: Renner, Dirk Year: 2005, 2009 ill.; Printout; Thesis (M.S.)--Oregon State University, 2006; Includes bibliographical references (leaves 55-61) Title: Distribution and habitat use of bull trout following the removal of nonnative brook trout Author: Renner, Dirk Year: 2005, 2009 ill.; Printout; Thesis (M.S.)--Oregon State University, 2006; Includes bibliographical references (leaves 55-61) Close

• 18. [Image] Visibility in Oregon's wilderness and national park lands

  	ill., photos; Cover title; "September, 1985."; Includes bibliographical references (p. 50-51)
  	Citation × Citation Citation Abstract Copy Title: Visibility in Oregon's wilderness and national park lands Author: Oregon. Air Quality Division Year: 1985, 2010 ill., photos; Cover title; "September, 1985."; Includes bibliographical references (p. 50-51) Title: Visibility in Oregon's wilderness and national park lands Author: Oregon. Air Quality Division Year: 1985, 2010 ill., photos; Cover title; "September, 1985."; Includes bibliographical references (p. 50-51) Close

• 19. [Image] Geothermal Direct Contact Heat Exchange Final Report

  	Sufficient work has been done to date to establish geothermal energy as a significant source for meeting our future energy needs. At the present time there are only a few geothermal power plants in operation; ...
  	Citation × Citation Citation Abstract Copy Title: Geothermal Direct Contact Heat Exchange Final Report Author: Sims, A.V. Year: 1976 Sufficient work has been done to date to establish geothermal energy as a significant source for meeting our future energy needs. At the present time there are only a few geothermal power plants in operation; in the United States, The Geysers field is the only location of commercial importance. The Geysers field is a vapor dominated reservoir, producing steam that is used directly in steam turbines. Such reservoirs are comparatively rare, and represent only a small portion of the available geothermal energy. Dry rock or magma sources are a potentially much larger source of geothermal energy, but the technology for utilizing these resources has not been developed. Liquid dominated reservoirs are a major source of geothermal energy and technology is available for exploiting them. Thus, liquid dominated reservoirs are the geothermal energy resource of major interest at this time. The principal power generation processes being considered for use with liquid dominated geothermal reservoirs are the binary, the flashed steam, and the direct contact; although many variations within the general classifications are possible. The flashed steam process is probably the simplest and is suitable for use with heavy scaling brines. The capital cost for the plant is probably lowest of the three, but brine usage for unit of power produced tends to be high. The binary process appears to be more efficient, but depends on the use of shell and tube heat exchangers for transferring heat from the brine to the working fluid. The use of such exchangers is impractical for brines with heavy scaling characteristics, and in any event the cost of the exchangers is a large part of the total plant cost. The direct contact binary process offers the possibility of reduced plant cost, good efficiency, and suitability for use with scaling brines. The process is, however, the least developed of the three and presents areas of technological uncertainty. The work reported here is a preliminary investigation of some of the technical and economic aspects of the direct contact process, and was undertaken in order to evaluate the commercial potential of the process. The work consisted of laboratory tests, a conceptual design, a 50 MWe plant design, an economic study, and a pilot plant program. The laboratory tests were made to obtain enough information to develop a realistic preliminary plant design. A glass direct contact heat exchange column was designed, constructed, and operated to get information on general performance characteristics, tray efficiencies, sizing correlations, and temperature approaches. A hot water-normal hexane system was used to permit operation in a glass column at atmospheric pressure. The physical characteristics of this system are close to those proposed for the commercial plant so the answers obtained are applicable to the commercial system. Hydrocarbon stripping tests were made using a glass column and nitrogen as stripping gas in order to establish the feasibility of recovering hydrocarbon from spent hot water. The tests showed that more work is needed in this area but that hydrocarbon stripping is feasible. Solubility tests were conducted to determine the effect of temperature, and brine composition on the solubility of three hydrocarbons. This information was needed to evaluate the impact of hydrocarbon losses on the cost of power production. A computer program was developed to aid in the evaluation of various possible direct contact thermodynamic cycles. The effect of operating variables on power production was evaluated; including the effect of brine inlet temperature, operating pressure, condensing temperature and choice of working fluid. After a general investigation, an optimum cycle was found for a specific site, the Heber field. The Heber field, located in the Imperial Valley of Southern California, was chosen as representative of a medium temperature low salinity reservoir with excellent commercial potential. As part of the conceptual design, studies were made on the prevention of working fluid loss in rejected hot water and in noncondensable gases, and the elimination of particulates in expander inlet gas. The studies were used to establish practical solutions to these important design problems, at least for the preliminary design. The results of the conceptual design were used to develop a preliminary design for a 50 MWe (delivered) plant. The plant was sized for 50MWe since preliminary studies made as part of another project had established this as an economic size. An estimated capital cost was developed for the 50 MWe plant, for use in the economic study. The economic study made use of a considerable body of information developed as part of a project done for the Electric Power Research Institute by Holt/Procon, a joint venture of The Ben Holt Co. and Procon Incorporated. This information included plant and operating costs for a closed loop binary and a two-stage flashed steam process as well as costs for brine production and power transmission. The same methods and factors were used for the direct contact process. Thus, it was possible to obtain a comparison among the three processes on a consistent basis. The relative values obtained should be relatively accurate. Since the process shows promise, a pilot plant program was prepared outlining areas for future work Title: Geothermal Direct Contact Heat Exchange Final Report Author: Sims, A.V. Year: 1976 Sufficient work has been done to date to establish geothermal energy as a significant source for meeting our future energy needs. At the present time there are only a few geothermal power plants in operation; in the United States, The Geysers field is the only location of commercial importance. The Geysers field is a vapor dominated reservoir, producing steam that is used directly in steam turbines. Such reservoirs are comparatively rare, and represent only a small portion of the available geothermal energy. Dry rock or magma sources are a potentially much larger source of geothermal energy, but the technology for utilizing these resources has not been developed. Liquid dominated reservoirs are a major source of geothermal energy and technology is available for exploiting them. Thus, liquid dominated reservoirs are the geothermal energy resource of major interest at this time. The principal power generation processes being considered for use with liquid dominated geothermal reservoirs are the binary, the flashed steam, and the direct contact; although many variations within the general classifications are possible. The flashed steam process is probably the simplest and is suitable for use with heavy scaling brines. The capital cost for the plant is probably lowest of the three, but brine usage for unit of power produced tends to be high. The binary process appears to be more efficient, but depends on the use of shell and tube heat exchangers for transferring heat from the brine to the working fluid. The use of such exchangers is impractical for brines with heavy scaling characteristics, and in any event the cost of the exchangers is a large part of the total plant cost. The direct contact binary process offers the possibility of reduced plant cost, good efficiency, and suitability for use with scaling brines. The process is, however, the least developed of the three and presents areas of technological uncertainty. The work reported here is a preliminary investigation of some of the technical and economic aspects of the direct contact process, and was undertaken in order to evaluate the commercial potential of the process. The work consisted of laboratory tests, a conceptual design, a 50 MWe plant design, an economic study, and a pilot plant program. The laboratory tests were made to obtain enough information to develop a realistic preliminary plant design. A glass direct contact heat exchange column was designed, constructed, and operated to get information on general performance characteristics, tray efficiencies, sizing correlations, and temperature approaches. A hot water-normal hexane system was used to permit operation in a glass column at atmospheric pressure. The physical characteristics of this system are close to those proposed for the commercial plant so the answers obtained are applicable to the commercial system. Hydrocarbon stripping tests were made using a glass column and nitrogen as stripping gas in order to establish the feasibility of recovering hydrocarbon from spent hot water. The tests showed that more work is needed in this area but that hydrocarbon stripping is feasible. Solubility tests were conducted to determine the effect of temperature, and brine composition on the solubility of three hydrocarbons. This information was needed to evaluate the impact of hydrocarbon losses on the cost of power production. A computer program was developed to aid in the evaluation of various possible direct contact thermodynamic cycles. The effect of operating variables on power production was evaluated; including the effect of brine inlet temperature, operating pressure, condensing temperature and choice of working fluid. After a general investigation, an optimum cycle was found for a specific site, the Heber field. The Heber field, located in the Imperial Valley of Southern California, was chosen as representative of a medium temperature low salinity reservoir with excellent commercial potential. As part of the conceptual design, studies were made on the prevention of working fluid loss in rejected hot water and in noncondensable gases, and the elimination of particulates in expander inlet gas. The studies were used to establish practical solutions to these important design problems, at least for the preliminary design. The results of the conceptual design were used to develop a preliminary design for a 50 MWe (delivered) plant. The plant was sized for 50MWe since preliminary studies made as part of another project had established this as an economic size. An estimated capital cost was developed for the 50 MWe plant, for use in the economic study. The economic study made use of a considerable body of information developed as part of a project done for the Electric Power Research Institute by Holt/Procon, a joint venture of The Ben Holt Co. and Procon Incorporated. This information included plant and operating costs for a closed loop binary and a two-stage flashed steam process as well as costs for brine production and power transmission. The same methods and factors were used for the direct contact process. Thus, it was possible to obtain a comparison among the three processes on a consistent basis. The relative values obtained should be relatively accurate. Since the process shows promise, a pilot plant program was prepared outlining areas for future work Close

• 20. [Image] Prescribed fire effects in the Panhandle area, Crater Lake National Park

  	ill., maps; Final report in partial satisfaction of cooperative agreement CA-9000-8-0007, subagreement 7, National Park Service, Pacific Northwest Region; "Autumn 1988."
  	Citation × Citation Citation Abstract Copy Title: Prescribed fire effects in the Panhandle area, Crater Lake National Park Author: Swezy, Michael; Agee, James K Year: 1988, 2008 ill., maps; Final report in partial satisfaction of cooperative agreement CA-9000-8-0007, subagreement 7, National Park Service, Pacific Northwest Region; "Autumn 1988." Title: Prescribed fire effects in the Panhandle area, Crater Lake National Park Author: Swezy, Michael; Agee, James K Year: 1988, 2008 ill., maps; Final report in partial satisfaction of cooperative agreement CA-9000-8-0007, subagreement 7, National Park Service, Pacific Northwest Region; "Autumn 1988." Close

• 21. [Image] Crater Lake limnological studies 1997 annual report

  	1982 - 2002; ill., maps; Title covers calendar years 1990-2002; Bibliographic description is based on 1990 annual report; CA 9000-8-0006 Subagreement 8; Includes bibliographic references; Issues lack volume ...
  	Citation × Citation Citation Abstract Copy Title: Crater Lake limnological studies 1997 annual report Author: Oregon State University; in collaboration with the National Park Service Year: 1997, 2009 1982 - 2002; ill., maps; Title covers calendar years 1990-2002; Bibliographic description is based on 1990 annual report; CA 9000-8-0006 Subagreement 8; Includes bibliographic references; Issues lack volume numbering Title: Crater Lake limnological studies 1997 annual report Author: Oregon State University; in collaboration with the National Park Service Year: 1997, 2009 1982 - 2002; ill., maps; Title covers calendar years 1990-2002; Bibliographic description is based on 1990 annual report; CA 9000-8-0006 Subagreement 8; Includes bibliographic references; Issues lack volume numbering Close

• 22. [Image] Interpreting variations in Secchi disk transparencies of Crater Lake: a deep caldera lake

  	ill.; Caption title; Includes bibliographical references;
  	Citation × Citation Citation Abstract Copy Title: Interpreting variations in Secchi disk transparencies of Crater Lake: a deep caldera lake Author: Larson, Gary L. Year: 2009 ill.; Caption title; Includes bibliographical references; Title: Interpreting variations in Secchi disk transparencies of Crater Lake: a deep caldera lake Author: Larson, Gary L. Year: 2009 ill.; Caption title; Includes bibliographical references; Close

• 23. [Image] A review of the taxonomic status of pines including true firs within the pinus ponderosa forest in the southern portion of Crater Lake National Park, Oregon

  	ill.; Report title; "A report to the Superintendent, Crater Lake National Park, March 1982." - T.p.; Includes bibliographical references (p. 11-16)
  	Citation × Citation Citation Abstract Copy Title: A review of the taxonomic status of pines including true firs within the pinus ponderosa forest in the southern portion of Crater Lake National Park, Oregon Author: Mastrogiuseppe, R. J. Year: 1982, 2009 ill.; Report title; "A report to the Superintendent, Crater Lake National Park, March 1982." - T.p.; Includes bibliographical references (p. 11-16) Title: A review of the taxonomic status of pines including true firs within the pinus ponderosa forest in the southern portion of Crater Lake National Park, Oregon Author: Mastrogiuseppe, R. J. Year: 1982, 2009 ill.; Report title; "A report to the Superintendent, Crater Lake National Park, March 1982." - T.p.; Includes bibliographical references (p. 11-16) Close

• 24. [Image] The geology and geochemistry of thirteen cinder cones at Crater Lake National Park, Oregon

  	ill.; maps; Thesis (M.S.)--University of Oregon, 1985; Includes vita and abstract; Includes bibliographical references (leaves 154-158)
  	Citation × Citation Citation Abstract Copy Title: The geology and geochemistry of thirteen cinder cones at Crater Lake National Park, Oregon Author: Prueher, Elizabeth M., 1957- Year: 1985, 2009 ill.; maps; Thesis (M.S.)--University of Oregon, 1985; Includes vita and abstract; Includes bibliographical references (leaves 154-158) Title: The geology and geochemistry of thirteen cinder cones at Crater Lake National Park, Oregon Author: Prueher, Elizabeth M., 1957- Year: 1985, 2009 ill.; maps; Thesis (M.S.)--University of Oregon, 1985; Includes vita and abstract; Includes bibliographical references (leaves 154-158) Close

• 25. [Image] The Marysville, Montana Geothermal Project (Revised)

  	The object of the Marysville Geothermal Project is to investigate a region of abnormally high geothermal heat flow near Marysville, MT, about 20 miles northwest of Helena. The research should determine ...
  	Citation × Citation Citation Abstract Copy Title: The Marysville, Montana Geothermal Project (Revised) Author: McSpadden, W.R. Year: 1974 The object of the Marysville Geothermal Project is to investigate a region of abnormally high geothermal heat flow near Marysville, MT, about 20 miles northwest of Helena. The research should determine the nature and size of the resource, how the energy might be extracted, the potential monetary value of the energy, and how similar resources elsewhere might be located. The heat source was expected to be a granitic pluton or magmatic intrusion, 10,000 to 40,000 years old, with temperatures in the range of 300 to 500°C. Originally it was thought that the pluton was at relatively shallow depths, but at present its depth and exact location are unknown Title: The Marysville, Montana Geothermal Project (Revised) Author: McSpadden, W.R. Year: 1974 The object of the Marysville Geothermal Project is to investigate a region of abnormally high geothermal heat flow near Marysville, MT, about 20 miles northwest of Helena. The research should determine the nature and size of the resource, how the energy might be extracted, the potential monetary value of the energy, and how similar resources elsewhere might be located. The heat source was expected to be a granitic pluton or magmatic intrusion, 10,000 to 40,000 years old, with temperatures in the range of 300 to 500°C. Originally it was thought that the pluton was at relatively shallow depths, but at present its depth and exact location are unknown Close

• 26. [Image] Geothermal Investigations in Idaho. Part 8. Heat Flow Study of the Snake River Plain Region, Idaho

  	The Snake River Plain of Idaho has recent lava flows and a large number of thermal springs and wells. A heat flow study was initiated which, together with available geological and geophysical information, ...
  	Citation × Citation Citation Abstract Copy Title: Geothermal Investigations in Idaho. Part 8. Heat Flow Study of the Snake River Plain Region, Idaho Author: Brott, C.A. Year: 1976 The Snake River Plain of Idaho has recent lava flows and a large number of thermal springs and wells. A heat flow study was initiated which, together with available geological and geophysical information, allows a better definition of the geothermal resource and evaluation of the geothermal potential. Local geothermal anomalies were not the objects of this study and have not been studied in detail. The quality of the heat flow values obtained varies as interpretation was necessary to determine geothermal gradients for many of the holes which had disturbances. A major problem in determining the heat flow values is the lack of knowledge of the in situ porosity of the rocks. The heat flow values obtained for the Eastern Snake River Plain are from shallow wells (< 200 m), hence the heat flow there is low (< 0.5 HFU) because of the water movement in the Snake Plain aquifer. The anomalous regional heat flow pattern around the Snake River Plain, together with other geophysical and geological data, suggest the presence of a major crustal heat source. With the exception of the area of the Snake Plain aquifer, high geothermal gradients were found in all areas of southern Idaho (40 to 100/sup 0/C/km). Temperatures hot enough for space heating can be found most anywhere in the Plain at relatively shallow depths (1 to 2 km). Temperatures hot enough for electrical power generation (200/sup 0/C) can be found beneath southern Idaho almost anywhere at depths of 3 to 4 kilometers. The Plain is fault bounded and hot water circulating along the fault zones from depths can be a very important geothermal resource at shallow depths. The margins of the Plain have the highest heat flow values, are the most faulted, and have possibly the highest geothermal resource potential Title: Geothermal Investigations in Idaho. Part 8. Heat Flow Study of the Snake River Plain Region, Idaho Author: Brott, C.A. Year: 1976 The Snake River Plain of Idaho has recent lava flows and a large number of thermal springs and wells. A heat flow study was initiated which, together with available geological and geophysical information, allows a better definition of the geothermal resource and evaluation of the geothermal potential. Local geothermal anomalies were not the objects of this study and have not been studied in detail. The quality of the heat flow values obtained varies as interpretation was necessary to determine geothermal gradients for many of the holes which had disturbances. A major problem in determining the heat flow values is the lack of knowledge of the in situ porosity of the rocks. The heat flow values obtained for the Eastern Snake River Plain are from shallow wells (< 200 m), hence the heat flow there is low (< 0.5 HFU) because of the water movement in the Snake Plain aquifer. The anomalous regional heat flow pattern around the Snake River Plain, together with other geophysical and geological data, suggest the presence of a major crustal heat source. With the exception of the area of the Snake Plain aquifer, high geothermal gradients were found in all areas of southern Idaho (40 to 100/sup 0/C/km). Temperatures hot enough for space heating can be found most anywhere in the Plain at relatively shallow depths (1 to 2 km). Temperatures hot enough for electrical power generation (200/sup 0/C) can be found beneath southern Idaho almost anywhere at depths of 3 to 4 kilometers. The Plain is fault bounded and hot water circulating along the fault zones from depths can be a very important geothermal resource at shallow depths. The margins of the Plain have the highest heat flow values, are the most faulted, and have possibly the highest geothermal resource potential Close

• 27. [Image] Research on the Physical Properties of Geothermal Reservoir Rock. Quarterly Report, March 1978

  	A laboratory study of the P-wave velocity and electric Resistivity was undertaken on Cenozoic Volcanic Rocks collected from the Columbia Plateau Volcanic basin (C) and the Jemez Volcanic field (NM). Electric ...
  	Citation × Citation Citation Abstract Copy Title: Research on the Physical Properties of Geothermal Reservoir Rock. Quarterly Report, March 1978 Author: Keller, G.V. Year: 1978 A laboratory study of the P-wave velocity and electric Resistivity was undertaken on Cenozoic Volcanic Rocks collected from the Columbia Plateau Volcanic basin (C) and the Jemez Volcanic field (NM). Electric resistivities of cylindrical samples saturated with 0.1 N NaCl solution were measured using a four electrode system and a 1.0 KHz frequency source. Seismic P-wave velocities were calculated from measured transit time of mechanical pulses generated and received by piezoelectric transducers. The electric Resistivity of water saturated Samples decreased as temperature increased to the boiling point of water. Above boiling point, Resistivity increased rapidly as water changed to vapor. Resistivity is most sensitive to temperature changes between 35/sup 0/C to 65/sup 0/C. Resistivities of samples increased with decrease in saturation. The effect is more pronounced at lower temperatures. No dependence of seismic P-wave velocities on temperature was observed. Both Resistivity and P-wave velocity depend on porosity. The increase in porosity results in a decrease in the Resistivity formation factor. Assuming a relationship FF = a phi/sup -m/ (Archie's Law), where FF and phi represent the formation factor and porosity respectively, least squares indicate a variation of a between .5 and 2.0. The value of m varied between 1.2 to 1.7. Seismic velocities (v) decrease as porosity increases. Porosity appears to be linearly related to log v. Several Samples show anomalous relationship between porosity and Resistivity. Most of these samples also show anomalous seismic velocities. The majority of these samples have coarse grains or large pores. The effect of saturation on P-wave velocity is small and can be observed in few samples. In these samples, seismic velocities decrease with increase in saturation at high saturation (100% to 85%), and show a reverse relationship at low saturation. Between 15% and 85% saturation in velocity is constant Title: Research on the Physical Properties of Geothermal Reservoir Rock. Quarterly Report, March 1978 Author: Keller, G.V. Year: 1978 A laboratory study of the P-wave velocity and electric Resistivity was undertaken on Cenozoic Volcanic Rocks collected from the Columbia Plateau Volcanic basin (C) and the Jemez Volcanic field (NM). Electric resistivities of cylindrical samples saturated with 0.1 N NaCl solution were measured using a four electrode system and a 1.0 KHz frequency source. Seismic P-wave velocities were calculated from measured transit time of mechanical pulses generated and received by piezoelectric transducers. The electric Resistivity of water saturated Samples decreased as temperature increased to the boiling point of water. Above boiling point, Resistivity increased rapidly as water changed to vapor. Resistivity is most sensitive to temperature changes between 35/sup 0/C to 65/sup 0/C. Resistivities of samples increased with decrease in saturation. The effect is more pronounced at lower temperatures. No dependence of seismic P-wave velocities on temperature was observed. Both Resistivity and P-wave velocity depend on porosity. The increase in porosity results in a decrease in the Resistivity formation factor. Assuming a relationship FF = a phi/sup -m/ (Archie's Law), where FF and phi represent the formation factor and porosity respectively, least squares indicate a variation of a between .5 and 2.0. The value of m varied between 1.2 to 1.7. Seismic velocities (v) decrease as porosity increases. Porosity appears to be linearly related to log v. Several Samples show anomalous relationship between porosity and Resistivity. Most of these samples also show anomalous seismic velocities. The majority of these samples have coarse grains or large pores. The effect of saturation on P-wave velocity is small and can be observed in few samples. In these samples, seismic velocities decrease with increase in saturation at high saturation (100% to 85%), and show a reverse relationship at low saturation. Between 15% and 85% saturation in velocity is constant Close

• 28. [Image] ASP: An Automated Seismic Processor for Microearthquake Networks

  	ASP, a low-power, in-field Automated Seismic Processor of microearthquake network data has been designed, fabricated, and deployed for initial operation in four different field areas to monitor seismicity ...
  	Citation × Citation Citation Abstract Copy Title: ASP: An Automated Seismic Processor for Microearthquake Networks Author: McEvilly, T. V. Year: 1981 ASP, a low-power, in-field Automated Seismic Processor of microearthquake network data has been designed, fabricated, and deployed for initial operation in four different field areas to monitor seismicity associated with two geothermal areas (The Geysers, California, and Cerro Prieto, Mexico), a nuclear explosion with its related collapse and aftershock sequence, and late (> 1 year) activity in a major aftershock series (Livermore, California). A second ASP system, with a high-speed front-end, is used in acoustic emission (1-20 kHz) analysis for fracture monitoring. Each of the 15 channels of ASP (configured for up to 128 channels) automatically detects, measures times and amplitudes, and computes and fits FFr's for both the P and S waves on data sampled at 100 samples/sec. These data from each channel are then processed with a central microprocessor for hypocenter location, running b-values, source parameters, event count, and P-wave polarities. The system is capable of processing a 15-station detection in approximately 40 seconds, excluding print-out. The initial trials have demonstrated that infield real-time analysis of data maximizes the efficiency of microearthquake surveys allowing flexibility in experimental procedures, with a minimum of the traditional labor-intensive postprocessing. Current efforts are directed towards improving efficiency of computation and data output and in expanding software capabilities Title: ASP: An Automated Seismic Processor for Microearthquake Networks Author: McEvilly, T. V. Year: 1981 ASP, a low-power, in-field Automated Seismic Processor of microearthquake network data has been designed, fabricated, and deployed for initial operation in four different field areas to monitor seismicity associated with two geothermal areas (The Geysers, California, and Cerro Prieto, Mexico), a nuclear explosion with its related collapse and aftershock sequence, and late (> 1 year) activity in a major aftershock series (Livermore, California). A second ASP system, with a high-speed front-end, is used in acoustic emission (1-20 kHz) analysis for fracture monitoring. Each of the 15 channels of ASP (configured for up to 128 channels) automatically detects, measures times and amplitudes, and computes and fits FFr's for both the P and S waves on data sampled at 100 samples/sec. These data from each channel are then processed with a central microprocessor for hypocenter location, running b-values, source parameters, event count, and P-wave polarities. The system is capable of processing a 15-station detection in approximately 40 seconds, excluding print-out. The initial trials have demonstrated that infield real-time analysis of data maximizes the efficiency of microearthquake surveys allowing flexibility in experimental procedures, with a minimum of the traditional labor-intensive postprocessing. Current efforts are directed towards improving efficiency of computation and data output and in expanding software capabilities Close

• 29. [Article] Vector Control - Wetlands of Concern

  Abstract -- The Wetlands of Concern dataset represents one type of “sensitive area” for the purpose of reviewing and approving Pesticide Use Plans per ODFW's obligations under ORS 452.140 and ORS 452.245. ...

  Citation × Citation Citation Abstract Copy Title: Vector Control - Wetlands of Concern Abstract -- The Wetlands of Concern dataset represents one type of “sensitive area” for the purpose of reviewing and approving Pesticide Use Plans per ODFW's obligations under ORS 452.140 and ORS 452.245. ODFW will only make recommendations for mosquito control treatment protocols on sensitive areas, as identified in ODFW's Vector Control Guidance for Sensitive Areas (http://www.dfw.state.or.us/fish/water/docs/Sensitive_Area_Guidance.pdf) or confirmed by the local fish and wildlife biologists utilizing the guidelines in the document. In general, a sensitive area is any area where fish and wildlife and their habitats are rare or of local importance due to their special nature or role in the ecosystem. Species-specific and location-specific details are not maintained in this dataset. This dataset is derived from the Oregon Wetlands Cover. The Oregon Wetlands Cover is a key component of the Oregon Wetland Explorer data portal (http://oregonexplorer.info/wetlands), and is intended to (1) serve as a framework for storing and disseminating information on the state's wetlands, and (2) promote comprehensive monitoring, assessment, conservation, and restoration of Oregon's wetlands. Wetlands with a Total Conservation Significance score of 70 and above were included in this dataset for the purpose of identifying wetlands of concern for vector control purposes. Title: Vector Control - Wetlands of Concern Abstract -- The Wetlands of Concern dataset represents one type of “sensitive area” for the purpose of reviewing and approving Pesticide Use Plans per ODFW's obligations under ORS 452.140 and ORS 452.245. ODFW will only make recommendations for mosquito control treatment protocols on sensitive areas, as identified in ODFW's Vector Control Guidance for Sensitive Areas (http://www.dfw.state.or.us/fish/water/docs/Sensitive_Area_Guidance.pdf) or confirmed by the local fish and wildlife biologists utilizing the guidelines in the document. In general, a sensitive area is any area where fish and wildlife and their habitats are rare or of local importance due to their special nature or role in the ecosystem. Species-specific and location-specific details are not maintained in this dataset. This dataset is derived from the Oregon Wetlands Cover. The Oregon Wetlands Cover is a key component of the Oregon Wetland Explorer data portal (http://oregonexplorer.info/wetlands), and is intended to (1) serve as a framework for storing and disseminating information on the state's wetlands, and (2) promote comprehensive monitoring, assessment, conservation, and restoration of Oregon's wetlands. Wetlands with a Total Conservation Significance score of 70 and above were included in this dataset for the purpose of identifying wetlands of concern for vector control purposes. Close

• 30. [Article] ODFW Wildlife Linkages Datasets

  Abstract -- Two GIS datasets are contained in this record: The Oregon Department of Fish and Wildlife, under the Oregon Wildlife Movement Strategy and in partnership with other government agencies, has ...

  Citation × Citation Citation Abstract Copy Title: ODFW Wildlife Linkages Datasets Abstract -- Two GIS datasets are contained in this record: The Oregon Department of Fish and Wildlife, under the Oregon Wildlife Movement Strategy and in partnership with other government agencies, has worked to produce this dataset of wildlife linkages, which are key movement areas for wildlife, emphasizing areas that cross paved roads. The primary goal of this dataset and its related attributes are to address the question: "Where is the best place on the landscape to provide for animal movement needs that are essential to life history function?" Title: ODFW Wildlife Linkages Datasets Abstract -- Two GIS datasets are contained in this record: The Oregon Department of Fish and Wildlife, under the Oregon Wildlife Movement Strategy and in partnership with other government agencies, has worked to produce this dataset of wildlife linkages, which are key movement areas for wildlife, emphasizing areas that cross paved roads. The primary goal of this dataset and its related attributes are to address the question: "Where is the best place on the landscape to provide for animal movement needs that are essential to life history function?" Close

• 31. [Article] ODFW Conservation Opportunity Areas

  Abstract -- Conservation Opportunity Areas were developed for the Comprehensive Wildlife Conservation Strategy to help identify priority areas for conservation actions that directly benefit wildlife and ...

  Citation × Citation Citation Abstract Copy Title: ODFW Conservation Opportunity Areas Abstract -- Conservation Opportunity Areas were developed for the Comprehensive Wildlife Conservation Strategy to help identify priority areas for conservation actions that directly benefit wildlife and habitats. Title: ODFW Conservation Opportunity Areas Abstract -- Conservation Opportunity Areas were developed for the Comprehensive Wildlife Conservation Strategy to help identify priority areas for conservation actions that directly benefit wildlife and habitats. Close

• 32. [Image] A review of scientific information on issues related to the use and management of water resources in the Pacific Northwest

  	Abstract Everest, Fred H.; Stouder, Deanna J.; Kakoyannis, Christina; Houston, Laurie; Stankey, George; Kline, Jeffery; Alig, Ralph. 2004. A review of scientific information ...
  	Citation × Citation Citation Abstract Copy Title: A review of scientific information on issues related to the use and management of water resources in the Pacific Northwest Year: 2004 Abstract Everest, Fred H.; Stouder, Deanna J.; Kakoyannis, Christina; Houston, Laurie; Stankey, George; Kline, Jeffery; Alig, Ralph. 2004. A review of scientific information on issues related to the use and management of water resources in the Pacific Northwest. Gen. Tech. Rep. PNW-GTR-595. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 128 p. Fresh water is a valuable and essential commodity in the Pacific Northwest States, specifically Oregon, Washington, and Idaho, and one provided abundantly by forested watersheds in the region. The maintenance and growth of industrial, municipal, agricultural, and recreational activities in the region are dependent on adequate and sustainable supplies of fresh water from surface and ground-water sources. Future development, especially in the semiarid intermountain area, depends on the conservation and expansion of the region's water resource. This synthesis reviews the state of our knowledge and condition of water resources in the Pacific Northwest. Keywords: Water distribution, flow regimes, water demand, conflicts, tools, water use. Title: A review of scientific information on issues related to the use and management of water resources in the Pacific Northwest Year: 2004 Abstract Everest, Fred H.; Stouder, Deanna J.; Kakoyannis, Christina; Houston, Laurie; Stankey, George; Kline, Jeffery; Alig, Ralph. 2004. A review of scientific information on issues related to the use and management of water resources in the Pacific Northwest. Gen. Tech. Rep. PNW-GTR-595. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 128 p. Fresh water is a valuable and essential commodity in the Pacific Northwest States, specifically Oregon, Washington, and Idaho, and one provided abundantly by forested watersheds in the region. The maintenance and growth of industrial, municipal, agricultural, and recreational activities in the region are dependent on adequate and sustainable supplies of fresh water from surface and ground-water sources. Future development, especially in the semiarid intermountain area, depends on the conservation and expansion of the region's water resource. This synthesis reviews the state of our knowledge and condition of water resources in the Pacific Northwest. Keywords: Water distribution, flow regimes, water demand, conflicts, tools, water use. Close

• 33. [Image] Improving salmon passage: draft, the Lower Snake River juvenile salmon migration feasibility report/environmental impact statement

  	The purpose of this summary report is to provide an overview of the findings developed for the Lower Snake River Juvenile Salmon Migration Feasibility Study. For more detailed information, the reader should ...
  	Citation × Citation Citation Abstract Copy Title: Improving salmon passage: draft, the Lower Snake River juvenile salmon migration feasibility report/environmental impact statement Year: 1999, 2004 The purpose of this summary report is to provide an overview of the findings developed for the Lower Snake River Juvenile Salmon Migration Feasibility Study. For more detailed information, the reader should refer to the Draft Feasibility Report/Environmental Impact Statement and attached appendices. The genesis of this study is the National Marine Fisheries Service's 1995 Biological Opinion for the Reinitiation of Consultation on 1994-1998 Operation of the Federal Columbia River Power System and Juvenile Transportation Program in 1995 and Future Years (95 Biological Opinion). While the focus of this study is the relationship between the four dams on the lower Snake River and their effects on juvenile fish traveling toward the ocean, the implications of the study are broader. The Draft Feasibility Report/Environmental Impact Statement includes the best available information on the biological effectiveness, engineering, economic effects, and other environmental effects associated with the four specific alternatives. It does not, however, include a recommendation or identify a preferred alternative. This will give the public and other agencies an opportunity to review and understand this information and provide input before a preferred alternative is selected. At the same time, this will allow the region to consider the Habitat, Hatcheries, Harvest, and Hydropower Working Paper on salmon recovery by the Federal Caucus. Information from this process will be fully examined to determine how it may influence decisions on actions for the lower Snake River. Title: Improving salmon passage: draft, the Lower Snake River juvenile salmon migration feasibility report/environmental impact statement Year: 1999, 2004 The purpose of this summary report is to provide an overview of the findings developed for the Lower Snake River Juvenile Salmon Migration Feasibility Study. For more detailed information, the reader should refer to the Draft Feasibility Report/Environmental Impact Statement and attached appendices. The genesis of this study is the National Marine Fisheries Service's 1995 Biological Opinion for the Reinitiation of Consultation on 1994-1998 Operation of the Federal Columbia River Power System and Juvenile Transportation Program in 1995 and Future Years (95 Biological Opinion). While the focus of this study is the relationship between the four dams on the lower Snake River and their effects on juvenile fish traveling toward the ocean, the implications of the study are broader. The Draft Feasibility Report/Environmental Impact Statement includes the best available information on the biological effectiveness, engineering, economic effects, and other environmental effects associated with the four specific alternatives. It does not, however, include a recommendation or identify a preferred alternative. This will give the public and other agencies an opportunity to review and understand this information and provide input before a preferred alternative is selected. At the same time, this will allow the region to consider the Habitat, Hatcheries, Harvest, and Hydropower Working Paper on salmon recovery by the Federal Caucus. Information from this process will be fully examined to determine how it may influence decisions on actions for the lower Snake River. Close

• 34. [Image] The Third Klamath Basin Watershed Restoration and Research Conference

  	Cover title; "March 1999."
  	Citation × Citation Citation Abstract Copy Title: The Third Klamath Basin Watershed Restoration and Research Conference Year: 1999, 2004 Cover title; "March 1999." Title: The Third Klamath Basin Watershed Restoration and Research Conference Year: 1999, 2004 Cover title; "March 1999." Close

• 35. [Image] Seeking refuge: making space for migratory waterfowl and wetlands along the Pacific Flyway

  	Abstract "Seeking Refuge" examines the history of migratory waterfowl management along the Pacific Flyway, the westernmost of four main migration routes in North America. Drawing on approaches from historical ...
  	Citation × Citation Citation Abstract Copy Title: Seeking refuge: making space for migratory waterfowl and wetlands along the Pacific Flyway Author: Wilson, Robert Michael Year: 2003, 2005, 2004 Abstract "Seeking Refuge" examines the history of migratory waterfowl management along the Pacific Flyway, the westernmost of four main migration routes in North America. Drawing on approaches from historical geography and environmental history, this study shows how wildlife officials developed migratory bird refuges in Oregon and California, where over 60 percent of Pacific Flyway waterfowl winter. During the early-twentieth century, reclamation and river diking eliminated most of the wetlands in the birds' wintering range. Bird enthusiasts such as bird watchers and duck hunters successfully lobbied for the creation of wildlife refuges in a few areas along the flyway. These early refuges failed to protect waterfowl habitat and they were severely degraded by reclamation. In the 1930s and 1940s, the U.S. Fish and Wildlife Service (FWS) and its predecessor, the Bureau of Biological Survey, undertook an ambitious program to resurrect these sanctuaries and to create new ones. Many farmers opposed these refuges out of fear that waterfowl would damage crops. To respond to these concerns and to ensure an adequate food supply for the birds, the FWS raised rice, barley, and other grains. The agency adopted many of the technologies of modern, industrial agriculture including synthetic herbicides and insecticides such as 2, 4-D and DDT. By the 1960s, the refuges had become largely mirrors of the surrounding irrigated farmlands, the main difference being that the FWS raised grain for waterfowl rather than for market. Refuges could not escape the agricultural settings in which they were embedded. As units within the irrigated countryside, Pacific Flyway refuges were often at the mercy of nearby farmers and federal reclamation agencies. Poor water quality and insufficient supplies of water often hampered FWS efforts to manage refuges. In the late-twentieth century, reduced water supply due to diversions to California municipalities and to sustain endangered fish species affected the amount of water reaching refuges. This dissertation has other goals. First, it critiques the anthropocentrism of most historical geography by focusing on how political, cultural, and ecological factors affected wildlife. Second, it contributes to the literature on the state's role in environmental protection by investigating the overlapping, and often contradictory, spaces within which wildlife managers implemented environmental regulations. Title: Seeking refuge: making space for migratory waterfowl and wetlands along the Pacific Flyway Author: Wilson, Robert Michael Year: 2003, 2005, 2004 Abstract "Seeking Refuge" examines the history of migratory waterfowl management along the Pacific Flyway, the westernmost of four main migration routes in North America. Drawing on approaches from historical geography and environmental history, this study shows how wildlife officials developed migratory bird refuges in Oregon and California, where over 60 percent of Pacific Flyway waterfowl winter. During the early-twentieth century, reclamation and river diking eliminated most of the wetlands in the birds' wintering range. Bird enthusiasts such as bird watchers and duck hunters successfully lobbied for the creation of wildlife refuges in a few areas along the flyway. These early refuges failed to protect waterfowl habitat and they were severely degraded by reclamation. In the 1930s and 1940s, the U.S. Fish and Wildlife Service (FWS) and its predecessor, the Bureau of Biological Survey, undertook an ambitious program to resurrect these sanctuaries and to create new ones. Many farmers opposed these refuges out of fear that waterfowl would damage crops. To respond to these concerns and to ensure an adequate food supply for the birds, the FWS raised rice, barley, and other grains. The agency adopted many of the technologies of modern, industrial agriculture including synthetic herbicides and insecticides such as 2, 4-D and DDT. By the 1960s, the refuges had become largely mirrors of the surrounding irrigated farmlands, the main difference being that the FWS raised grain for waterfowl rather than for market. Refuges could not escape the agricultural settings in which they were embedded. As units within the irrigated countryside, Pacific Flyway refuges were often at the mercy of nearby farmers and federal reclamation agencies. Poor water quality and insufficient supplies of water often hampered FWS efforts to manage refuges. In the late-twentieth century, reduced water supply due to diversions to California municipalities and to sustain endangered fish species affected the amount of water reaching refuges. This dissertation has other goals. First, it critiques the anthropocentrism of most historical geography by focusing on how political, cultural, and ecological factors affected wildlife. Second, it contributes to the literature on the state's role in environmental protection by investigating the overlapping, and often contradictory, spaces within which wildlife managers implemented environmental regulations. Close

• 36. [Image] A strategy for achieving healthy watersheds in Oregon

  	"January 2001."
  	Citation × Citation Citation Abstract Copy Title: A strategy for achieving healthy watersheds in Oregon Author: Oregon Watershed Enhancement Board Year: 2001, 2004 "January 2001." Title: A strategy for achieving healthy watersheds in Oregon Author: Oregon Watershed Enhancement Board Year: 2001, 2004 "January 2001." Close

• 37. [Image] The Endangered Species Act and its impact on agricultural producers: hearing before the Subcommittee on Conservation, Credit, Rural Development, and Research of the Committee on Agriculture, House of representatives, One Hundred Eighth Congress, second session, July 26, 2004, Greely, CO.

  	CONTENTS Lucas, Hon. Frank, a Representative in Congress from the State of Oklahoma, opening statement .................................................................................... 1 Musgrave, ...
  	Citation × Citation Citation Abstract Copy Title: The Endangered Species Act and its impact on agricultural producers: hearing before the Subcommittee on Conservation, Credit, Rural Development, and Research of the Committee on Agriculture, House of representatives, One Hundred Eighth Congress, second session, July 26, 2004, Greely, CO. Author: United States. Congress. House. Committee on Agriculture. Subcommittee on Conservation, Credit, Rural Development, and Research. Year: 2004, 2005 CONTENTS Lucas, Hon. Frank, a Representative in Congress from the State of Oklahoma, opening statement .................................................................................... 1 Musgrave, Hon. Marilyn N., a Representative in Congress from the State of Colorado, opening statement........................................................................... 2 Witnesses Foutz, Alan, president, Colorado Farm Bureau, Centennial, CO ........................ 10 Prepared statement .......................................................................................... 38 George, Russell, executive director, Colorado Department of Natural Resources, Denver, CO............................................................................................. 4 Prepared statement .......................................................................................... 29 Palmer, William, executive director, Rocky Mountain Bird Observatory, Brighton, CO ........................................................................................................ 16 Prepared statement.......................................................................................... 60 Sims, James T., executive director, Western Business Roundtable, Golden, CO.......................................................................................................................... 13 Prepared statement .......................................................................................... 43 Stetson, Jean, co-chairman, Endangered Species Committee, Colorado Cattlemen, Craig, CO..................................................................................................... 7 Prepared statement .......................................................................................... 36 Submitted Material Weege, Merle, secretary, Ginseng Board of Wisconsin, statement...................... 65 Title: The Endangered Species Act and its impact on agricultural producers: hearing before the Subcommittee on Conservation, Credit, Rural Development, and Research of the Committee on Agriculture, House of representatives, One Hundred Eighth Congress, second session, July 26, 2004, Greely, CO. Author: United States. Congress. House. Committee on Agriculture. Subcommittee on Conservation, Credit, Rural Development, and Research. Year: 2004, 2005 CONTENTS Lucas, Hon. Frank, a Representative in Congress from the State of Oklahoma, opening statement .................................................................................... 1 Musgrave, Hon. Marilyn N., a Representative in Congress from the State of Colorado, opening statement........................................................................... 2 Witnesses Foutz, Alan, president, Colorado Farm Bureau, Centennial, CO ........................ 10 Prepared statement .......................................................................................... 38 George, Russell, executive director, Colorado Department of Natural Resources, Denver, CO............................................................................................. 4 Prepared statement .......................................................................................... 29 Palmer, William, executive director, Rocky Mountain Bird Observatory, Brighton, CO ........................................................................................................ 16 Prepared statement.......................................................................................... 60 Sims, James T., executive director, Western Business Roundtable, Golden, CO.......................................................................................................................... 13 Prepared statement .......................................................................................... 43 Stetson, Jean, co-chairman, Endangered Species Committee, Colorado Cattlemen, Craig, CO..................................................................................................... 7 Prepared statement .......................................................................................... 36 Submitted Material Weege, Merle, secretary, Ginseng Board of Wisconsin, statement...................... 65 Close

• 38. [Image] Research information needs on terrestrial vertebrate species of the interior Columbia River basin and northern portions of the Klamath and Great basins: research, development, and application database

  	"September 1997"; Includes bibliographical references (p. 24)
  	Citation × Citation Citation Abstract Copy Title: Research information needs on terrestrial vertebrate species of the interior Columbia River basin and northern portions of the Klamath and Great basins: research, development, and application database Author: Marcot, Bruce G. Year: 1997, 2005, 2004 "September 1997"; Includes bibliographical references (p. 24) Title: Research information needs on terrestrial vertebrate species of the interior Columbia River basin and northern portions of the Klamath and Great basins: research, development, and application database Author: Marcot, Bruce G. Year: 1997, 2005, 2004 "September 1997"; Includes bibliographical references (p. 24) Close

• 39. [Image] Summary of the analysis of the management situation: Klamath Falls Resource Area resource management plan

  	"December 1990"
  	Citation × Citation Citation Abstract Copy Title: Summary of the analysis of the management situation: Klamath Falls Resource Area resource management plan Author: United States. Bureau of Land Management. Klamath Falls Resource Area Office. Year: 1990, 2005, 2004 "December 1990" Title: Summary of the analysis of the management situation: Klamath Falls Resource Area resource management plan Author: United States. Bureau of Land Management. Klamath Falls Resource Area Office. Year: 1990, 2005, 2004 "December 1990" Close

• 40. [Image] Surveying forest streams for fish use

  	Oregon Department of Forestry Forest Practices Section 2600 State Street Salem, OR 97310 Dl Fish 8 Wildlife Oregon Department of Fish and Wildlife Habitat Conservation Division P. O. Box 59 Portland, OR ...
  	Citation × Citation Citation Abstract Copy Title: Surveying forest streams for fish use Author: Oregon. Forest Practices Section; Oregon. Habitat Conservation Division Year: 1995, 2005, 2004 Oregon Department of Forestry Forest Practices Section 2600 State Street Salem, OR 97310 Dl Fish 8 Wildlife Oregon Department of Fish and Wildlife Habitat Conservation Division P. O. Box 59 Portland, OR 97207 Introduction Identifying Oregon streams that contain fish is an important part in carrying out the new Water Protection Rules. These rules aim to protect areas of benefi-cial uses, such as fish. First, however, the beneficial uses present in each forest stream must be correctly identified. At present, a large number of fish- bearing streams are not identified on stream classification maps. To correct this problem, the Oregon Department of Forestry ( ODF) and the Oregon Department of Fish and Wildlife ( ODFW) must complete comprehensive surveys to identify fish use on all non- federal forest streams in Oregon. This effort will require at least 3 to 5 years and a significant financial investment. Because many streams are not accurately classified, the new rules also tempo-rarily protect streams that are likely to contain fish. Under the rules, for example, if Stream A flows into a body of water known to contain fish, it is assumed that fish also are using Stream A, up to the point that a natural barrier blocks their way farther upstream ( see OAR 629- 57- 2100: ll( b) B). Once the survey efforts are complete, this interim rule will not be needed. Coordinated efforts by public agencies, landowners, and others to complete fish- presence surveys will assure that important fisheries resources are pro-tected in the most cost- effective way. Landowners or any interested party may collect stream- classification information so that the overall survey can be completed as quickly as possible. Many private forest landowners, in cooperation with Oregon Department of Fish and Wildlife, are now completing inventories of stream habitat conditions on their lands. In the future, these cooperative efforts may also include fish-presence surveys. This publication tells how to complete fish- presence surveys on forested streams. The guidelines cover: How to plan either " operation- specific" or " maximum upstream fish distribution" surveys The proper way to conduct surveys The proper time of year to conduct surveys Minimum efforts required in completing the surveys The legal requirements for completing the surveys How to provide information to Oregon Department of Forestry to update the stream classification maps The stream reclassification process Operation- specif ic surveys Maximum upstream distribution surveys Planning the survey There are two major types of survey: operation- specific surveys, and surveys to find the maximum upstream distribution of fish. Each type requires different planning and is conducted using different approaches. Operation- specific surveys are those to classify a stream only in the particular area of an operation. This kind of survey may not include efforts to determine the maximum upstream extent of fish use. An operation- specific survey takes minimal planning and coordination. However, it may be very inefficient in the long run because future activities in other areas of the stream may require additional surveys. An operation- specilk survey is very simple to complete. It starts at the down-stream end of the operation area and moves upstream either to the end of the operation area or to the end of fish distribution, whichever comes first. If the purpose of the survey is to prove no fish use, the surveyor must be sure to make at least the minimum effort required to find fish ( see the section on " Survey Effort" on page 10). This kind of survey is done on an entire stream reach or on multiple stream reaches rather than on a restricted portion of a stream. Often, all streams within a basin or reach are completely surveyed. In some cases, the surveys encompass entire ownerships or watersheds. The specific locations of planned operations are usually not the main factor in setting up this kind of survey but can help decide which areas to survey first. Surveys to find the maximum upstream extent of fish use may be the most efficient and cost- effective. Surveyors often cover a group of streams in one area at a time; therefore, travel time is minimized because, often, a group of streams can be easily reached by one common forest road. When travel time is less, the time spent actually completing surveys is greater. This kind of survey may require slightly more planning and coordination to assure efficiency and to minimize duplication of effort by adjacent landowners or by other public agencies, but overall this approach is more cost- effective than the operation-specific surveys. Surveying for the maximum upstream distribution of fish may take more plan-ning than an operation- specific survey, but it is still relatively simple. First, look at ODF Stream Classification Maps for the survey area to see the current extent of fish- use streams. Also note which streams are not classified at all. Next, decide where to start the survey. It may help your planning if you know the relationship between watershed basin area and fish use for your area. Contact the local ODFW office to find out whether these relationships have been established for streams in your area. The information predicts where fish use is " likely to end" and so will help you decide where to start your surveys. At this point, you also may want to consider operations that are planned for certain areas and decide to survey those areas first. After choosing a starting area, look at current road maps to find potential starting points for the survey ( see Figure 1). Look for access points ( such as road crossings) near the upper reaches of the stream. When possible, a survey should start near the highest accessible point in the watershed. If road access to the stream is limited, you may want to start the survey near the point at which the stream's classification size changes from " medium" to " small"; often this point is near the end of fish use ( see Figure 2, page 4). At the starting point, first sample upstream. If you find fish, continue the survey upstream until fish use ends. Be sure to continue sampling above the point at which fish use ends ( see " Survey Effort," page 10). If you make all the required efforts but do not find fish, then survey downstream from the original starting point until you find fish. When surveying downstream, it is important to walk on the streambank until you are ready to sample so that the water stays clear. Begin fish survey above road crossing Fish use extends at least this far Figure I . Selecting survey starting points in an area with a road crossing. Additional survey work may be required if the maximum distribution of fish seems to be affected by a road culvert. If the stream above the culvert has no fish, sample the pool immediately below the culvert. If you find fish in this pool or downstream near the culvert, the culvert is a possible barrier to fish passage. Describe the culvert and the stream on the survey form ( page 19). If you do not find fish in the pool below the culvert, continue the survey down-stream until you do see fish. Begin fish survey here \ \\ \ / I Fish use extends at least this far - - k I Figure 2. Selecting survey starting points, based on the stream- size classification, in an area without a road crossing. Surveys to find the maximum upstream distribution of fish may require sampling across several land ownerships. Be certain to get permission from other landowners before beginning the survey. Contacts with other landowners are also important to prevent a duplication of effort, because many landowners and agencies may be conducting fish- presence surveys. When figuring how many surveyors and how much time you'll need to com-plete surveys in your area, you may want to consider the Department of Forestry's experience. We found that sampling a township ( 36 square miles) required approximately 24 person- days in the Coast region, but an area the same size in the Blue Mountains required only 4 person- days. Survey methods The accuracy and reliability of survey results depend greatly on the methods used to conduct the survey. Methods range from simply looking in the stream ( visual observation) to more intensive and effective sampling with a backpack electroshocker. The method you choose depends on the availability of sam-pling equipment, the size of the stream, the flow and clarity of the water, and other factors. It is important to select a sampling method that is best for the type of survey and for the waters being sampled. If the sample method is not appropriate, the results of the survey will not be very useful. For example, just looking at a stream may tell you there are fish in it at that point, but it is not an acceptable way to find the maximum upstream extent of fish use. Surveys to show that fish are not present require more sampling and specialized equipment in order to provide reliable results. Whenever the survey uses methods other than an electroshocker, it's important to thoroughly explain on the survey report form the reasons for using the other methods. This is the simplest method; it involves only walking the stream to look for fish. It is best to wear polarized sunglasses to reduce glare from the water and to survey only when water conditions allow good visibility. It's also best to walk upstream so that you can " sneak up" on fish in pools. Fish often are near the upstream ends of pools waiting for food to drift toward them. Small fish, such as fry, often are in shallow water along the margin of the stream. Be very alert because fish usually will dart into cover when they detect any movement, especially in small headwater streams. It helps to toss bread crumbs, insects, small twigs, or bemes into the stream to entice the fish to leave cover. The visual method is best suited to small streams where pools aren't deep enough to prevent your seeing the fish. This method is also the least damaging to the fish because actual collection is not required. However, the value of survey results can be reduced by many factors such as cloudy water, surface glare on the water, overcast days ( reduced light), fish behavior, and even the surveyor's poor eyesight. For these reasons, this method is not effective for determining the maximum upstream limit of fish distribution, although it can be used to prove fish are in a certain reach of the stream. Snorkeling is a special method of visual observation that can work well in some situations. Snorkeling allows you to see underwater through a diving mask and breathing snorkel. This method can be used in larger waters where electroshockers are less successful, and it has been used to locate fry where other methods failed. Night snorkel surveys are particularly useful for observ-ing bull trout fry. Visual observation Hook and line Backpack electroshocker The hook- and- line method uses a rod and reel and relies on the feeding be-havior of the fish. In small streams, drop a baited hook into the deepest pools, where larger fish often are. Bait can include worms, single eggs, cheese, dry flies, or stream insects such as caddis larvae. Sample pools that have a lot of cover because those tend to support greater numbers of fish. As with the visual observation method, approach the pool cautiously to avoid alerting the fish. To minimize the risk of injuring or killing the fish, always use barbless hooks. The hook- and- line method can be used when conditions are not good for visual sampling; for example, when water is not clear, flow is high, or the day is overcast. This method may be the most effective for sampling some larger or deeper waters where visual and electroshocker methods can be ineffective. These waters include deep beaver ponds and large, steep streams where downstream barriers ( such as falls and very steep sections) keep fish out of the small tributaries. This method has limitations, though, depending on fish behavior and the life stage of the fish that are present. Fish may be reluctant to bite on cold days, or when the water is murky with sediment, or if the fish detect the surveyor's presence. Also, hook- and- line sampling is not effective if only fry are in the stream. This method also depends on the angling skills of the surveyor. As with the visual observation method, hook- and- line sampling may not be the best way to determine the maximum upstream distribution of fish in small streams, but often it can be used to find fish in larger waters. The most effective way to determine the upstream extent of fish is with a backpack electroshocker. Electroshocker sampling requires additional training and experience, though, to be effective and safe. A backpack electroshocker introduces an electric field into the stream that temporarily immobilizes fish. Stunned fish can be observed as they float in the water, or they can be captured in a small hand net for closer observation if necessary. As with other methods, it is best to work in an upstream direction, wear polarized glasses, and to approach the sampling site carefully to avoid alerting the fish. One person nets fish while another person operates the electroshocker. The netter should walk behind or beside the shocker to avoid alerting the fish. The electroshocker can be very effective for sampling in small streams even where brush or instream cover prevents most other sampling methods. In fact, an electroshocker is often most effective in areas with instream cover because fish usually concentrate in these locations. This method works in streams of various sizes but is less effective in larger streams and in deep pools, espe-cially large beaver ponds. Use electroshockers carefully to minimize killing fish. When properly adjusted and used, the electroshocker should stun the fish without killing them. The fish may escape if the current is set too low, but usually the surveyor will still see the fish and so be able to document fish presence. To sample effectively and minimize fish kill, set the electroshocker on the lowest practical voltage output and low- frequency currents ( low pulse rates). Before sampling, use a voltame-ter to test the electroshocker in a stream. If the voltameter is not available, it is a good idea to test the electroshocker in a stream that you know has fish before working in streams whose fish use you do not know. The test will tell you whether the equipment is working and the effects of using different settings. The surveyors' safety must be considered carefully before using this method. Electroshockers can injure or kill humans if not properly used. Surveyors should not use this method without proper training, including CPR training. Surveyors should work in crews of at least two. All surveyors should wear rubber waders and rubber gloves during stream shocking and never use dipnets with metallic handles; the nets should have wood or fiberglass handles. All members of an electroshocking crew should understand the proper operation procedures and potential dangers of this equipment. The effectiveness of electroshocker sampling depends on water conditions and on the skills of the electroshocker operator and the netter. The electroshocker method may not be so useful in high flows or in turbulent or murky water because the surveyors may not see immobilized fish. Another drawback to this method is that the electroshockers may not be widely available and can be expensive. However, with proper training and experience and under suitable survey conditions, this method is the best for accurately determining the maximum upstream extent of fish use. There may be situations where reliable results can be had by using methods not discussed here. For example, headwater beaver ponds may be effectively Other methods sampled by fishing for at least 48 hours with minnow traps baited with salmon eggs or commercial trout bait. Or, seine nets may be effective in beaver ponds or larger waters. If you are thinking about using these or other sampling methods, discuss it first with the departments of Fish and Wildlife and of Forestry. They will decide whether the proposed methods are appropriate and, if so, set the required minimum level of sample effort for the alternate method. A backpack electroshocker is the best way to get reliable information about the upstream extent of fish use or to prove a stream is m e N ( no fish use). Sur- Survey methods: vey data that document the presence of fish through other methods, such as a summary visual observation or hook- and- line, will always be used to classify streams as Type F as far up as the point of observation, even though the exact upstream extent of fish use may not be known. In some cases, methods other than an electroshocker may give reliable information about the maximum upstream distribution of fish. Examples include deep beaver ponds and large, steep streams in which barriers keep fish out of small upstream tributaries. In those cases, reliable results may be better obtained with hook- and- line sampling or with other methods. Whenever the survey is conducted by methods other than an electroshocker, the reasons for choosing the other method must be thor-oughly explained on the survey form. Timing the surveys Survey accuracy depends a lot on the time of year the survey is done and on stream conditions at that time. Since the purpose of the survey is to accurately document the presence or absence of fish, it is critical to do the survey when fish are expected to be using the upper reaches of a stream. This generally is near spawning times or soon after fry emerge, when stream flows are relatively high. A survey done during a low- flow period may not indicate the actual maximum upstream extent of fish use or accurately prove no fish use the stream. Fish may use the upper reaches of a stream for a limited time only, so fish- use surveys must be timed carefully. Surveys done at other than recommended times may not give a complete description of fish use. For example, if fish are found at other than the recommended survey times, the surveyed part of the stream can be classified as fish- bearing, but the maximum upstream extent of fish use may not be known. If fish are not found, that will not necessarily prove that the stream reach does not support fish use. Only if the survey is made at a time when fish are most likely to be there can the absence of fish be a reliable sign that no fish use that portion of the stream. Other factors can affect the reliability of the survey even if it is made at the proper time. Abnormal flows due to drought or extreme runoff could affect the distribution of fish or the sampling efficiency of the surveyor. So, it is best not only to do the sampling within the recommended time period but also when conditions are appropriate. In some cases, survey timing may not have much effect on the reliability of survey results. This could occur when factors other than seasonal flow patterns control the upstream extent of fish distribution. For example, streams that get most of their water from springs may not have seasonal flow variations, including summer flows low enough to control the upstream distribution of fish. Or, conditions other than low flow could be controlling distribution. For example, large, steep streams that have natural barriers such as falls and steep, impassable sections. In such cases, surveys taken outside the recommended time periods may yield reliable data. However, it is important to describe these conditions thoroughly on the survey forms to justify not following the recom-mended timing. See Table 1 for the recommended sampling periods for different regions of the state for normal water- flow years. Periods differ due to variations in stream flow patterns, fish species, and life- history traits of the species in the different areas. Contact the local ODFW office before sampling to find out the best time to survey the stream you are planning to sample. Table 1. General recommended time periods to sample streams, by geographic region, during nomull water- flow years. Please contact your local ODFW ofice before sampling in order to get specific timing recommendations for the stream you will be sampling. REGION of Recommended Georeaion Stream Survey Period WESTERNO REGON All Coast South Coast West Cascades Interior Siskiyou March 1 through May 3 1 EASTERONR EGON All except spring- fed April 1 East Cascades through June 30 Blue Mountains Spring- fed streams* Entire year * Spring- fed streams are streams that get most of their water Born groundwater sources and that have very minor seasonal variations in flow. Stream surveys must be done within certain time periods ( Table 1) if the purpose is to prove the stream does not contain fish or to document the maximum upstream extent of fish use. mming recommendations are based on normal water- flow years and may vary in some years. Contact the local ODFW office before sampling to get specific timing recommendations for the streams to be surveyed. Information gathered at other times of the year may be used to document fish presence but may not be reliable enough to establish upstream fish- use limits or to classify the stream as II) lpe N ( no fish use). Whenever the recommended survey timing is not used, it is important to explain the reasons on the survey form so that the data can be evaluated for reliability. ~ - ~ Survey timing: a summary Survey effort: a summary Survey effort The level of effort used to complete the survey also can affect the reliability of the survey results. If the level of effort or the amount of stream sampled is too little, it may be wrong to conclude that fish are not present. The following guidelines describe the minimum level of survey effort required to assure that the data are reliable. If the purpose of the survey is to show that no fish use the stream, the survey will be considered reliable only if it includes at least 50 yards of stream length md a minimum of six pools, each at least 1 foot deep, immediately upstream of the point at which the non- fish- bearing section begins. ( In some cases, the survey will have to cover much more than 50 yards of stream in order to also include the required six pools.) In addition, the survey must include sampling any beaver dam ponds in the upstream non- fish section. Surveyors are encouraged to exceed the minimum level of effort in order to be even more sure that fish are absent from a stream reach and that the maximum upstream extent of fish use has been found. A survey intended to show the absence of fish must sample at least 50 yards of stream distance and a minimum of six pools, each at least 1 foot deep, imme-diately upstream of the point at which fish use is believed to end. In addition, any beaver ponds upstream must be sampled as part of the survey. The require-ments for the methods used and the timing of the survey also must be met in order to document the absence of fish. Legal requirements In Oregon, the Department of Fish and Wildlife regulates the collection of fish for personal or scientific use. Generally, collection methods prohibited by the general angling regulations, such as electroshockers, traps, or nets, and collec-tions at times of the year when angling is closed will require a Scientific Collection Permit from the Oregon Department of Fish and Wildlife. Scientific Collection Permits can be issued to agencies, companies, or indi-viduals. Request an application from the Fish Division of the Oregon Depart-ment of Fish and Wildlife, P. O. Box 59, Portland, OR 97207; telephone ( 503) 229- 5410, extension 323. Submit the application at least 1 month before you plan to do the survey in order to be sure the permit can be issued in time. The application requests information about the collection method to be used, when and where collection will be made, and a summary of the proposed project. By law, surveyers must keep records of their collection activities and submit them to the Oregon Department of Fish and Wildlife. Surveys using the visual observation method ( including snorkeling) do not require any licenses or permits because fish are not physically collected. Sampling with the hook- and- line method during open fishing seasons requires only a valid angling license. However, Oregon resident landowners and their immediate families do not need angling licenses to fish on land they own and live on. In either case, the general ahgling regulations for the stream must be followed during hook- and- line sampling unless a Scientific Collection Permit is obtained. Additional restrictions on survey efforts may apply if the stream contains species that the state or federal government lists as sensitive, threatened, or endangered species. Please contact your local ODFW office to find out whether any of these species are likely to be in streams you plan to sample. Reporting survey results Give survey data to the local ODF district office so that district Stream Classi-fication Maps can be updated. On page 19 is a blank survey report form. It asks for information about the location of the stream; the methods, timing, and effort of the survey; the physical character of the stream; observations of fish and wildlife; and the presence of natural or human- created barriers to fish passage. complete one form for each stream reach where fish were ob-served or fish use was found to end. See Figure 3 ( page 12) for descriptions of some fish species common to $ mall, forested streams; these may help to identify fish seen during surveys. Detailed instructions for completing the survey form are on pages 14 through 18. Attach to the Fish Presence Survey Form a copy of the ODF Stream ClassM-cation Map for the surveyed area or, if that is not available, a copy of the 7.5 minute USGS topographic map for the area. Note the following information on the map. ( Examples of completed survey report forms and maps are on pages 21 through 30.) The area of the stream that was actually surveyed ( including the areas without fish) as part of the survey effort. Highlight in yellow the entire stream reach surveyed ( see examples on pages 25,28, and 30). The upper limit of fish use. Note this on the map by drawing a line across the stream and writing the letter F at that point. The name of the surveyor. The date the stream was surveyed. GENUS ONCORHYNCUS - PACIFIC SALMON IOENTIFICATION FEATURES OF JUVENILES Faint parr marks. extend little. if am: below latanl line. Lures SOCKEYE w GENUS ONCORHYNCUS- TROUT IDENTIFICATIOEI FUTURES OF JUVENILES pols in dorsal Teeth on of tongue Maxillary extend past rear margin on throat W - Of eye CUTTHROAT 5 - I 0 parr marks on ridge ahead of dorsal tongue astend & st rear mark on throat Y; V margin of eye STEELHEAD- RAINBOW Few or no spots i n tail Figure 3. Identification characteristics of some juvenile salmon and trout species that may be observed in forested streams. 3. Permission to enter private forest lands should be obtained from all land-owners before the surveys are conducted. 4. Fish- presence surveys should then be made according to the guidelines given in this publication. 5. The required survey information, recorded on the Fish Presence Survey Form and maps, should be given to the local ODF district office. 6. The ODF office will give copies of the completed survey forms and maps to the local office of the Oregon Department of Fish and Wildlife. 7. The Department of Forestry will review the information, usually in consul-tation with the Oregon Department of Fish and Wildlife, to determine whether the survey results are reliable. 8. Based on its assessment of data reliability, the Department of Forestry will make appropriate changes to the ODF Stream Classification Maps. 9. All affected landowners will be notified of the proposed stream classifica-tion changes, according to the notification rules ( OAR 629- 57- 2110( 2)). Instructions for completing the survey report form The following information should be reported on the Fish Presence Survey Form. These instructions are in the order that the information appears on the form. Complete one form for each stream reach or branch where fish were observed or fish use was found to end. This may require assigning codes to unnamed tributaries ( for example, " trib. a," " trib. b") so that survey data can be cross- referenced to the survey maps. Please refer to examples on pages 21 through 29. Surveyor Narne( s): The name of the person or persons responsible for con-ducting the survey and reporting the results. AgencyfCompany: The name of the agency or company that employs the surveyor ( if applicable). Landowner: The name of the landowner of the reach surveyed. Mailing Address and Phone: The address and phone number for the person responsible for the survey. Stream: The name of the stream as reported on the USGS or ODF Stream Classification Map for the area. If the stream is unnamed, report the stream as " unnamed" and list the tributary that it flows into (" Tributary to..."). Tributary to: The name of the main stream ( as reported on the USGS or ODF map) that the surveyed stream flows into. This is especially important if the surveyed stream is unnamed. Quad Map: The name of the USGS 7.5 minute topographic map that includes the reach of the stream surveyed. If the surveyed reach covers more than one quad map, report first the name of the map that shows the identified end- point of fish use and then give the other maps' names. Location: A legal description ( township, range, and section to at least the quarter section) of the location where fish use ends. Date Surveyed: The month, day, and year the fish survey was conducted. Survey Method: Check the box for the survey method used. If more than one method was used, check all that apply and note the most often used method in the comments section or in the form's margin. Survey Amount Above End of Fish Use: The length of stream reach that was surveyed immediately upstream of the identified end of fish use. Estimate ( in feet) the length surveyed, and give the number of pools sampled for fish in that section. A survey to prove the absence of fish must sample at least 50 yards of stream and at least six pools immediately upstream of the end of fish use. In addition, any upstream beaver ponds must also be sampled. Flow Level: The flow conditions at the time of the survey. Use the following categories of flow. Low: Ranges from a series of isolated pools to flowing across less than 75 percent of the average bankfull width. Moderate: Surface water is flowing across 75 to 90 percent of the average bankfull width. High: Surface water flowing across more than 90 percent of the average bankfull width. It is not recommended thatfih presence surveys be conducted at high jlows. Weather: The weather during most of the fish survey ( rainy, overcast, partly cloudy, sunny, snowy, etc.). Water Clarity: The water visibility during the survey. Use the following categories of water visibility. Clear: Visibility is good in pools, deep pools, and riffles. Moderate: Visibility is good only in riffles and shallow pools. Turbid: Visibility is poor in both riffles and pools. It is not recommended that fih presence surveys be conducted when water is turbid. Water Temperature ( optional): The temperature of the stream ( in degrees Farenheit) at the time of the survey. Fish observations Report the species and approximate size ranges of fish observed in the sur-veyed reach. Use Figure 3 ( page 12) as a guide to identifying some game fish species commonly found in small, forested streams. Use the following codes and instructions to complete this section. Species: Use the following names or codes to report fish observed during the survey. If you observe a species not listed here, such as Pacific lamprey, use its common name. Name Species Code Coho salmon Co Cutthroat trout Ct Rainbow troutfsteelhead Rb/ St Bull trout BUT Brook trout BT Unknown salmonid UnS Sizes: Report the size range of fish, in inches, by species. For example, the size range of coho observed could be reported as " 1- 4 inches." If you see several sizes of one species ( for example, some cutthroat trout in the " 1- to 2- inch range and others in the " 6- to 8- inch" range), list them separately. Aquatic wildlife The types of aquatic wildlife that may be observed include tailed frogs ( includ-ing juvenile " tadpoles"), Pacific giant salamanders, and Olympic salamanders. Species: Give the common name of the species, if known. If you don't know the species name, at least report observations by a general name such as " salamanders." Number: The number of aquatic wildlife in each species or group observed. Physical stream data Report the physical characteristics of the stream in the vicinity of the end- point of fish use. Report information separately for ( 1) the section immediately at and downstream of the end of fish use, and ( 2) the area upstream of the maximum extent of fish use. Following are specific instructions for collecting this information. Bankfull Channel Width: By eye, estimate the average width ( in feet) of the bankfull channel for the 100- foot sections above and below the end- point of fish use. The bankfull channel is the area that is scoured by water during average high flows. The edge of the bankfull channel can be identified by looking for changes in vegetation, in soils and litter characteristics, or in the shape of the bank. The bank often will abruptly change slope at the bankfull boundary. Vegetation at the boundary often changes from annual vegetation ( such as grasses) to more permanent vegetation such as trees and shrubs. Estimate the width across the channel between the edges of the bankfull level. Current Wetted Width: Visually estimate the average width ( in feet) of the channel that contains flow ( is wetted) at the time of the survey. Report the estimated averages for the 100- foot sections above and below the end of fish use. Channel Gradient: Measure the average stream gradient with a clinometer for the 100- foot sections above and below the end of fish use. me a piece of flagging at eye level on a branch or shrub, walk up or down the stream bank, and then use the clinometer to sight on the flagging while you are standing on the channel bottom. Read and report the percent gradient. ODF Stream Class Size: The stream size (" small," " medium," or " large") from the ODF Stream Classification Maps for the reaches immediately above and downstream of the end of fish use. Natural barriers This information is very important for understanding relationships between the presence of fish and the physical characteristics of the stream. Understanding these relationships can help determine where fish- presence surveys should be concentrated and help predict where fish are likely to occur if survey informa-tion is not yet available. Generally, natural barriers are permanent structures such as falls or vertical drops more than 8 to 10 feet high for salmon or steel-head or 4 feet high for trout. Log jams, drops over logs, beaver dams, or other organic structures generally are only temporary barriers to fish passage, but report them as well. If fish use ends at a natural barrier, such as a waterfall, bedrock chute or cascades, describe the conditions at the site. Include a description of: ( 1) the type of barrier, ( 2) the approximate height ( in feet), ( 3) the percentage of slope, ( 4) the length ( in feet) of the bedrock chute or cascades, and ( 5) any other conditions that may be limiting fish passage. If the potential barrier is a bedrock chute, note whether the bedrock contains pools or rough features ( such as rocks, boulders, or other breaks in the flow), or whether the water flows in an even, shallow pattern over the bedrock. Please note on the survey map the locations of any natural barriers encountered. If you encounter a natural barrier, also be sure to sample above this point because fish often are found above natural barriers. Road- crossing barriers This information also is very important for understanding relationships be-tween the presence of fish and the physical characteristics of the stream. Road-crossing barriers can alter the relationships. If fish use ends at a road- crossing barrier, such as a culvert, describe the conditions at the site. Describe the type of barrier and its measurements at the time of the survey such as ( 1) the diameter of the culvert, in inches, ( 2) the depth ( in inches) of water in the culvert, ( 3) the height ( in feet) of the jump ( drop) below the culvert or structure, ( 4) the depth ( in inches or feet) of the plunge pool below the culvert outfall, ( 5) the gradient or slope of the culvert, given as a percentage as read off a clinometer, ( 6) the length ( in feet) of the culvert, and ( 7) any other factors that could affect fish passage. Please note on the survey map the locations of any road- crossing barriers, even if they are not at the end- point of fish use. As with natural barriers, be sure also to sample above the site because fish often are found above road- crossing barriers. Other comments Any other comments or notations that you think may be pertinent to the fish survey. It helps to describe any notable habitat characteristics, for example " lots of instream wood," " very few pools in the reach," " heavy silt load in the stream." Use the reverse side of the form if necessary. FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): Agency: Land Owner: Mailing Address: Phone: Date Surveyed: Stream: Tributary to: Quad Map: Location: T R Sec. Survey Method ( d): 0 Electroshocker 0 h & g 0 Visual Survey Above End of Fish Use: Distance ( feet) Number of Pools Flow Level ( d): 0 Low 17 Moderate High Weather: Water Temperature: Water Clarity ( d): Clear 17 Moderate 17 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. Other comments ( use reverse side if necessary): FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): . be Sorveq , 3 Troo+, FI s h G n r u l l , I*? , S.; L. Agency: N/ C I Land Owner: k! 4~ 4f, l T; M ~ C C Mailing address:?.^. sox ~ g~,\ L L I M UF~ A \ ID~ R) jC? suo Phone: BSB- 5555 ate surveyed: A p ( ; i 2 8, ! ?? s I Stream: Un hawed , " Tr I b R!' Tributary to: lr3 F . 21 o k so- ~ r a& QuadMap: D\ A &\ dy Location: T 305 R 5 " L Sec. 30, sw/ sto Survey Method ( d): d~ lectroshocker Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) I 86 ' Number of Pools Flow Level ( d): CI Low cd~ oderate High Weather: S owv Water Temperature: 7 O F I Water Clarity ( V): dclear Moderate I7 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE Species I Snes 1 Spedes 1 Quant'ity 1 PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. bk If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. prf+ Other comments ( use reverse side if necessary): f- 15 L wsz ewd 30 $& abov e f *; rd John50~ m ain\ ifi< ~ r o s s i n OH ~ f r e a ~ 7.% ~ 5t redw g d ~ e n f & ry s t u p abde + he a d 4' & sh use - p & f i a n 10%. 2 1 OREGON FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Fish & Wildlife Stream: ~) nr? euce, d " Tr t b, O " Tributary to: w F & n~ oq CC. Quad Map: old &\ A% Location: T 382 R 5E Sec.' 30, si/ Sw I Survey Method ( 4): ~ lectroshocker 0 Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) 2 5' 0 Number of Pools 20 Flow Level ( d): 0 Low d ~ o d e r a t e High Weather: Lw+ Water Temperature: 6 0 F I Water Clarity ( d): dclear Cl Moderate Turbid FISH OBSERVATIONS AQUATIC WILDLIFE Species 1 Snes I! , Species Quantity If fish use ends at a natural bamer, desc ' be the conditions that prevent u stre m fish assage. Fid - 4s 4+ 2 S ' ~ r t i Lm* r? d\. A dJ @ cater also % 15& 5 ( ho& a. r. rp Q5 W F - buffis @ ere fouu\ d . opstr + ye If fish use ehs) at a roa d. crossmng, descnbe conhlons that may prevent upstream fish passage. Other comments ( use reverse side if necessary): w tfw+ were fbU 4 above % z 6 + of (~ la+ erf~ ll above fu 25fcof I sowe years. 22 fail s& i ro fish t@ f& probab/ y vp FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP stream: V A ~ ~ ~ + SC~" T & ~ ributaryto: u. F. 3ehbtja14 Creek Quad Map: old - b a t d ~ Location: T 3 S 5 R 5 E Sec. Survey Method ( d): d~ lectroshocker 0 Anghng 0 Visual Survey Above End of Fish Use: Distance ( feet) a 2 5 Number of Pools 2 Flow Level ( d): 0 Low & oderate 0 High Weather: SvMwv Water Temperature: I Water Clarity ( d): d l e a r 0 Moderate 0 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE - ... . .: : :....: ' ' . . . . . . A , , , .: . . . . , . . , .&& : ! Species ... . ..$ pedes Quantity PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. M/ A If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Stream: West h r k Aobrson Cr eeG Tributary to: Johnrow Cre~ k Quad Map: ( ~ ( 4Ith .\ Ay Location: T 385 R 5 E Sec. 2?,, 5E/ sLJ I Survey Method ( d): dlectroshocker 0 Angling Visual Survey Above End of Fish Use: Distance ( feet) 3 00 Number of Pools t% Flow Level ( V): 0 Low d ~ o d e r ae t High Weather: j , y~ I Water Temperature: 60" F= Water Clarity ( d): & ear Moderate Turbid FISH OBSERVATIONS AQ- U ATIC WILDLIFE t Spedes Quantity 1 I PHYSICAL STREAM DATA + IH n D CtsL 5h-* If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. N I A If fish use ends t a roqj crossiy, describ~ concl~~ tohnats may prevent upstr am fish passa e. ~ hrvctr ert a no? pQ59 ~ c - r b LOWOJQ 4 u. 4 9 ) drop at * rut-/&. b l d a r p fn qr p aI . 7, slop is 6 70 , and w ( onp 7 % fu~ lv er+ 1s ~ chul~ ledb e replace4 t bi s Svmncr. Other comments ( use reverse s~ de~ fn ecessa ): Lower ~ t r c a - q r d r r & a & e + LC cd en. Sf- rm* bb; M Ieok 30a4, but + k shaln. dry up ;* SOW years. FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Mailing Address: ?. c, 3 2 , AJLO ~ L4- T o R 70 00 Phone: b40 - oool Date Surveyed: / Ha v 2 / cj? T I stream: ~ nnclcr- ed , " 7- r; b k " Tributary to: Lobs k c Creek Quad Map: BULL Lrceu Rtdqc Location: T 35 R 2W S ~ C . ~ ~ N € + 4 Survey Method ( d): ~ lectroshocker Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) 300 Number of Pools I 57 Flow Level ( d): 0 Low rd~ oderate High Weather: 7k + lVL * wy Water Temperature: 6 O T-Water Clarity ( d): && ear Moderate Turbid FISH OBSERVATIONS AQUATIC WILDLlFE I , , , ' Species Sies Spedes Quantity If fish use ends, at a natural ba ' er, describe t e conditions that prevent upstream fish passage. The. LZ m c b r u f - ~ V~ L ry 54- p X e u e + he ed$+ t.* use. ~ k rlrcnu, RIIIVC ~ L I : : pain+ I S ~ 4 1 ~ g ~ r L ~ d eo5ve r bai( Lle r S, b+ + his ri- gf obnhi~ n o+ Q b r r r t c r. ' 7 If fish use ends at a road crossing, descn e conditions that may prevent upstream fish passage. U P Other comments ( use reverse side if necessary): N r 4.0r L r ~ s; Wj J bCqPn 5 u ru . + r + he L) wediunn - sws\ l size chaqc, F, sh U ~ CC ~ wJh c r t a d c c y t r ; b ~ + G~ d . ovt WLQ) ew- ker s LLII+. 26 FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): 30 e Cadd i i , Bob hJvrnP1\ Agency: o ba~ ~ a'ndbwner: Lobsfec C r , ~ , , b c c Mailing Address: 7 D. ' 30K 2 , ~ J L pLet~ t , D R DO Phone: 8 YD- o 00 1 Date Surveyed: m4 I/ 2, i? 7- C I f Stream: / ) ~ ~ ~ ~ ek bS "" ~ c Tributaryto: L o b s t e r Lraek Quad Map: B V ' ~ Cr eek ??, d. ie Location: T 73 R 2 0 Sec. 3Y, ~ I. o AA. J G Survey Method ( d): d~ lectroshocker Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) 2 5 0 Number of Pools / D Flow Level ( d): 0 Low d ~ o d e r a t e 0 High Weather: 94, & SU W\ I Water Temperature: 5- 7 " ?= Water Clarity ( d) : Wc1ea. r CI Moderate 0 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE PHYSICAL STREAM DATA Species Sics Spedes If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. Quantity If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. I I Other comments ( use reverse side if necessary): ~ h5ctre um WLS " r y ~ Lw iL tL ~ decy f- goo( r. @. la f is/., observe4 , Ty pr N ~ f . r e u ~ z . FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): \ ce < . 3ab Tr cut Agency: u/ k2 Mailing ~ ddress: Z3R Rne St , b k n h( e dr ! OR ? d o 0 Phone: ZB?- 3333 Date Surveyed: stream: ~*- aweA Tributary to: c r & QuadMap: G l e w b ~ ~ e k Location: T \ 4 5 R 6 @ Sec. zS,, ~ 3t .+ S-Survey Method ( d): d~ lectroshocker Angling Visual Survey Above End of Fish Use: Distance ( feet) Number of Pools Q Flow Level ( d): 0 Low & oderate High Weather: C( ea c Water Temperature: 5?* F Water Clarity ( d): lW2ear 0 Moderate Turbid FISH OBSERVATIONS AQUATIC WILDLIFE Species Sizes Spedes Quantity PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. U P If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. Title: Surveying forest streams for fish use Author: Oregon. Forest Practices Section; Oregon. Habitat Conservation Division Year: 1995, 2005, 2004 Oregon Department of Forestry Forest Practices Section 2600 State Street Salem, OR 97310 Dl Fish 8 Wildlife Oregon Department of Fish and Wildlife Habitat Conservation Division P. O. Box 59 Portland, OR 97207 Introduction Identifying Oregon streams that contain fish is an important part in carrying out the new Water Protection Rules. These rules aim to protect areas of benefi-cial uses, such as fish. First, however, the beneficial uses present in each forest stream must be correctly identified. At present, a large number of fish- bearing streams are not identified on stream classification maps. To correct this problem, the Oregon Department of Forestry ( ODF) and the Oregon Department of Fish and Wildlife ( ODFW) must complete comprehensive surveys to identify fish use on all non- federal forest streams in Oregon. This effort will require at least 3 to 5 years and a significant financial investment. Because many streams are not accurately classified, the new rules also tempo-rarily protect streams that are likely to contain fish. Under the rules, for example, if Stream A flows into a body of water known to contain fish, it is assumed that fish also are using Stream A, up to the point that a natural barrier blocks their way farther upstream ( see OAR 629- 57- 2100: ll( b) B). Once the survey efforts are complete, this interim rule will not be needed. Coordinated efforts by public agencies, landowners, and others to complete fish- presence surveys will assure that important fisheries resources are pro-tected in the most cost- effective way. Landowners or any interested party may collect stream- classification information so that the overall survey can be completed as quickly as possible. Many private forest landowners, in cooperation with Oregon Department of Fish and Wildlife, are now completing inventories of stream habitat conditions on their lands. In the future, these cooperative efforts may also include fish-presence surveys. This publication tells how to complete fish- presence surveys on forested streams. The guidelines cover: How to plan either " operation- specific" or " maximum upstream fish distribution" surveys The proper way to conduct surveys The proper time of year to conduct surveys Minimum efforts required in completing the surveys The legal requirements for completing the surveys How to provide information to Oregon Department of Forestry to update the stream classification maps The stream reclassification process Operation- specif ic surveys Maximum upstream distribution surveys Planning the survey There are two major types of survey: operation- specific surveys, and surveys to find the maximum upstream distribution of fish. Each type requires different planning and is conducted using different approaches. Operation- specific surveys are those to classify a stream only in the particular area of an operation. This kind of survey may not include efforts to determine the maximum upstream extent of fish use. An operation- specific survey takes minimal planning and coordination. However, it may be very inefficient in the long run because future activities in other areas of the stream may require additional surveys. An operation- specilk survey is very simple to complete. It starts at the down-stream end of the operation area and moves upstream either to the end of the operation area or to the end of fish distribution, whichever comes first. If the purpose of the survey is to prove no fish use, the surveyor must be sure to make at least the minimum effort required to find fish ( see the section on " Survey Effort" on page 10). This kind of survey is done on an entire stream reach or on multiple stream reaches rather than on a restricted portion of a stream. Often, all streams within a basin or reach are completely surveyed. In some cases, the surveys encompass entire ownerships or watersheds. The specific locations of planned operations are usually not the main factor in setting up this kind of survey but can help decide which areas to survey first. Surveys to find the maximum upstream extent of fish use may be the most efficient and cost- effective. Surveyors often cover a group of streams in one area at a time; therefore, travel time is minimized because, often, a group of streams can be easily reached by one common forest road. When travel time is less, the time spent actually completing surveys is greater. This kind of survey may require slightly more planning and coordination to assure efficiency and to minimize duplication of effort by adjacent landowners or by other public agencies, but overall this approach is more cost- effective than the operation-specific surveys. Surveying for the maximum upstream distribution of fish may take more plan-ning than an operation- specific survey, but it is still relatively simple. First, look at ODF Stream Classification Maps for the survey area to see the current extent of fish- use streams. Also note which streams are not classified at all. Next, decide where to start the survey. It may help your planning if you know the relationship between watershed basin area and fish use for your area. Contact the local ODFW office to find out whether these relationships have been established for streams in your area. The information predicts where fish use is " likely to end" and so will help you decide where to start your surveys. At this point, you also may want to consider operations that are planned for certain areas and decide to survey those areas first. After choosing a starting area, look at current road maps to find potential starting points for the survey ( see Figure 1). Look for access points ( such as road crossings) near the upper reaches of the stream. When possible, a survey should start near the highest accessible point in the watershed. If road access to the stream is limited, you may want to start the survey near the point at which the stream's classification size changes from " medium" to " small"; often this point is near the end of fish use ( see Figure 2, page 4). At the starting point, first sample upstream. If you find fish, continue the survey upstream until fish use ends. Be sure to continue sampling above the point at which fish use ends ( see " Survey Effort," page 10). If you make all the required efforts but do not find fish, then survey downstream from the original starting point until you find fish. When surveying downstream, it is important to walk on the streambank until you are ready to sample so that the water stays clear. Begin fish survey above road crossing Fish use extends at least this far Figure I . Selecting survey starting points in an area with a road crossing. Additional survey work may be required if the maximum distribution of fish seems to be affected by a road culvert. If the stream above the culvert has no fish, sample the pool immediately below the culvert. If you find fish in this pool or downstream near the culvert, the culvert is a possible barrier to fish passage. Describe the culvert and the stream on the survey form ( page 19). If you do not find fish in the pool below the culvert, continue the survey down-stream until you do see fish. Begin fish survey here \ \\ \ / I Fish use extends at least this far - - k I Figure 2. Selecting survey starting points, based on the stream- size classification, in an area without a road crossing. Surveys to find the maximum upstream distribution of fish may require sampling across several land ownerships. Be certain to get permission from other landowners before beginning the survey. Contacts with other landowners are also important to prevent a duplication of effort, because many landowners and agencies may be conducting fish- presence surveys. When figuring how many surveyors and how much time you'll need to com-plete surveys in your area, you may want to consider the Department of Forestry's experience. We found that sampling a township ( 36 square miles) required approximately 24 person- days in the Coast region, but an area the same size in the Blue Mountains required only 4 person- days. Survey methods The accuracy and reliability of survey results depend greatly on the methods used to conduct the survey. Methods range from simply looking in the stream ( visual observation) to more intensive and effective sampling with a backpack electroshocker. The method you choose depends on the availability of sam-pling equipment, the size of the stream, the flow and clarity of the water, and other factors. It is important to select a sampling method that is best for the type of survey and for the waters being sampled. If the sample method is not appropriate, the results of the survey will not be very useful. For example, just looking at a stream may tell you there are fish in it at that point, but it is not an acceptable way to find the maximum upstream extent of fish use. Surveys to show that fish are not present require more sampling and specialized equipment in order to provide reliable results. Whenever the survey uses methods other than an electroshocker, it's important to thoroughly explain on the survey report form the reasons for using the other methods. This is the simplest method; it involves only walking the stream to look for fish. It is best to wear polarized sunglasses to reduce glare from the water and to survey only when water conditions allow good visibility. It's also best to walk upstream so that you can " sneak up" on fish in pools. Fish often are near the upstream ends of pools waiting for food to drift toward them. Small fish, such as fry, often are in shallow water along the margin of the stream. Be very alert because fish usually will dart into cover when they detect any movement, especially in small headwater streams. It helps to toss bread crumbs, insects, small twigs, or bemes into the stream to entice the fish to leave cover. The visual method is best suited to small streams where pools aren't deep enough to prevent your seeing the fish. This method is also the least damaging to the fish because actual collection is not required. However, the value of survey results can be reduced by many factors such as cloudy water, surface glare on the water, overcast days ( reduced light), fish behavior, and even the surveyor's poor eyesight. For these reasons, this method is not effective for determining the maximum upstream limit of fish distribution, although it can be used to prove fish are in a certain reach of the stream. Snorkeling is a special method of visual observation that can work well in some situations. Snorkeling allows you to see underwater through a diving mask and breathing snorkel. This method can be used in larger waters where electroshockers are less successful, and it has been used to locate fry where other methods failed. Night snorkel surveys are particularly useful for observ-ing bull trout fry. Visual observation Hook and line Backpack electroshocker The hook- and- line method uses a rod and reel and relies on the feeding be-havior of the fish. In small streams, drop a baited hook into the deepest pools, where larger fish often are. Bait can include worms, single eggs, cheese, dry flies, or stream insects such as caddis larvae. Sample pools that have a lot of cover because those tend to support greater numbers of fish. As with the visual observation method, approach the pool cautiously to avoid alerting the fish. To minimize the risk of injuring or killing the fish, always use barbless hooks. The hook- and- line method can be used when conditions are not good for visual sampling; for example, when water is not clear, flow is high, or the day is overcast. This method may be the most effective for sampling some larger or deeper waters where visual and electroshocker methods can be ineffective. These waters include deep beaver ponds and large, steep streams where downstream barriers ( such as falls and very steep sections) keep fish out of the small tributaries. This method has limitations, though, depending on fish behavior and the life stage of the fish that are present. Fish may be reluctant to bite on cold days, or when the water is murky with sediment, or if the fish detect the surveyor's presence. Also, hook- and- line sampling is not effective if only fry are in the stream. This method also depends on the angling skills of the surveyor. As with the visual observation method, hook- and- line sampling may not be the best way to determine the maximum upstream distribution of fish in small streams, but often it can be used to find fish in larger waters. The most effective way to determine the upstream extent of fish is with a backpack electroshocker. Electroshocker sampling requires additional training and experience, though, to be effective and safe. A backpack electroshocker introduces an electric field into the stream that temporarily immobilizes fish. Stunned fish can be observed as they float in the water, or they can be captured in a small hand net for closer observation if necessary. As with other methods, it is best to work in an upstream direction, wear polarized glasses, and to approach the sampling site carefully to avoid alerting the fish. One person nets fish while another person operates the electroshocker. The netter should walk behind or beside the shocker to avoid alerting the fish. The electroshocker can be very effective for sampling in small streams even where brush or instream cover prevents most other sampling methods. In fact, an electroshocker is often most effective in areas with instream cover because fish usually concentrate in these locations. This method works in streams of various sizes but is less effective in larger streams and in deep pools, espe-cially large beaver ponds. Use electroshockers carefully to minimize killing fish. When properly adjusted and used, the electroshocker should stun the fish without killing them. The fish may escape if the current is set too low, but usually the surveyor will still see the fish and so be able to document fish presence. To sample effectively and minimize fish kill, set the electroshocker on the lowest practical voltage output and low- frequency currents ( low pulse rates). Before sampling, use a voltame-ter to test the electroshocker in a stream. If the voltameter is not available, it is a good idea to test the electroshocker in a stream that you know has fish before working in streams whose fish use you do not know. The test will tell you whether the equipment is working and the effects of using different settings. The surveyors' safety must be considered carefully before using this method. Electroshockers can injure or kill humans if not properly used. Surveyors should not use this method without proper training, including CPR training. Surveyors should work in crews of at least two. All surveyors should wear rubber waders and rubber gloves during stream shocking and never use dipnets with metallic handles; the nets should have wood or fiberglass handles. All members of an electroshocking crew should understand the proper operation procedures and potential dangers of this equipment. The effectiveness of electroshocker sampling depends on water conditions and on the skills of the electroshocker operator and the netter. The electroshocker method may not be so useful in high flows or in turbulent or murky water because the surveyors may not see immobilized fish. Another drawback to this method is that the electroshockers may not be widely available and can be expensive. However, with proper training and experience and under suitable survey conditions, this method is the best for accurately determining the maximum upstream extent of fish use. There may be situations where reliable results can be had by using methods not discussed here. For example, headwater beaver ponds may be effectively Other methods sampled by fishing for at least 48 hours with minnow traps baited with salmon eggs or commercial trout bait. Or, seine nets may be effective in beaver ponds or larger waters. If you are thinking about using these or other sampling methods, discuss it first with the departments of Fish and Wildlife and of Forestry. They will decide whether the proposed methods are appropriate and, if so, set the required minimum level of sample effort for the alternate method. A backpack electroshocker is the best way to get reliable information about the upstream extent of fish use or to prove a stream is m e N ( no fish use). Sur- Survey methods: vey data that document the presence of fish through other methods, such as a summary visual observation or hook- and- line, will always be used to classify streams as Type F as far up as the point of observation, even though the exact upstream extent of fish use may not be known. In some cases, methods other than an electroshocker may give reliable information about the maximum upstream distribution of fish. Examples include deep beaver ponds and large, steep streams in which barriers keep fish out of small upstream tributaries. In those cases, reliable results may be better obtained with hook- and- line sampling or with other methods. Whenever the survey is conducted by methods other than an electroshocker, the reasons for choosing the other method must be thor-oughly explained on the survey form. Timing the surveys Survey accuracy depends a lot on the time of year the survey is done and on stream conditions at that time. Since the purpose of the survey is to accurately document the presence or absence of fish, it is critical to do the survey when fish are expected to be using the upper reaches of a stream. This generally is near spawning times or soon after fry emerge, when stream flows are relatively high. A survey done during a low- flow period may not indicate the actual maximum upstream extent of fish use or accurately prove no fish use the stream. Fish may use the upper reaches of a stream for a limited time only, so fish- use surveys must be timed carefully. Surveys done at other than recommended times may not give a complete description of fish use. For example, if fish are found at other than the recommended survey times, the surveyed part of the stream can be classified as fish- bearing, but the maximum upstream extent of fish use may not be known. If fish are not found, that will not necessarily prove that the stream reach does not support fish use. Only if the survey is made at a time when fish are most likely to be there can the absence of fish be a reliable sign that no fish use that portion of the stream. Other factors can affect the reliability of the survey even if it is made at the proper time. Abnormal flows due to drought or extreme runoff could affect the distribution of fish or the sampling efficiency of the surveyor. So, it is best not only to do the sampling within the recommended time period but also when conditions are appropriate. In some cases, survey timing may not have much effect on the reliability of survey results. This could occur when factors other than seasonal flow patterns control the upstream extent of fish distribution. For example, streams that get most of their water from springs may not have seasonal flow variations, including summer flows low enough to control the upstream distribution of fish. Or, conditions other than low flow could be controlling distribution. For example, large, steep streams that have natural barriers such as falls and steep, impassable sections. In such cases, surveys taken outside the recommended time periods may yield reliable data. However, it is important to describe these conditions thoroughly on the survey forms to justify not following the recom-mended timing. See Table 1 for the recommended sampling periods for different regions of the state for normal water- flow years. Periods differ due to variations in stream flow patterns, fish species, and life- history traits of the species in the different areas. Contact the local ODFW office before sampling to find out the best time to survey the stream you are planning to sample. Table 1. General recommended time periods to sample streams, by geographic region, during nomull water- flow years. Please contact your local ODFW ofice before sampling in order to get specific timing recommendations for the stream you will be sampling. REGION of Recommended Georeaion Stream Survey Period WESTERNO REGON All Coast South Coast West Cascades Interior Siskiyou March 1 through May 3 1 EASTERONR EGON All except spring- fed April 1 East Cascades through June 30 Blue Mountains Spring- fed streams* Entire year * Spring- fed streams are streams that get most of their water Born groundwater sources and that have very minor seasonal variations in flow. Stream surveys must be done within certain time periods ( Table 1) if the purpose is to prove the stream does not contain fish or to document the maximum upstream extent of fish use. mming recommendations are based on normal water- flow years and may vary in some years. Contact the local ODFW office before sampling to get specific timing recommendations for the streams to be surveyed. Information gathered at other times of the year may be used to document fish presence but may not be reliable enough to establish upstream fish- use limits or to classify the stream as II) lpe N ( no fish use). Whenever the recommended survey timing is not used, it is important to explain the reasons on the survey form so that the data can be evaluated for reliability. ~ - ~ Survey timing: a summary Survey effort: a summary Survey effort The level of effort used to complete the survey also can affect the reliability of the survey results. If the level of effort or the amount of stream sampled is too little, it may be wrong to conclude that fish are not present. The following guidelines describe the minimum level of survey effort required to assure that the data are reliable. If the purpose of the survey is to show that no fish use the stream, the survey will be considered reliable only if it includes at least 50 yards of stream length md a minimum of six pools, each at least 1 foot deep, immediately upstream of the point at which the non- fish- bearing section begins. ( In some cases, the survey will have to cover much more than 50 yards of stream in order to also include the required six pools.) In addition, the survey must include sampling any beaver dam ponds in the upstream non- fish section. Surveyors are encouraged to exceed the minimum level of effort in order to be even more sure that fish are absent from a stream reach and that the maximum upstream extent of fish use has been found. A survey intended to show the absence of fish must sample at least 50 yards of stream distance and a minimum of six pools, each at least 1 foot deep, imme-diately upstream of the point at which fish use is believed to end. In addition, any beaver ponds upstream must be sampled as part of the survey. The require-ments for the methods used and the timing of the survey also must be met in order to document the absence of fish. Legal requirements In Oregon, the Department of Fish and Wildlife regulates the collection of fish for personal or scientific use. Generally, collection methods prohibited by the general angling regulations, such as electroshockers, traps, or nets, and collec-tions at times of the year when angling is closed will require a Scientific Collection Permit from the Oregon Department of Fish and Wildlife. Scientific Collection Permits can be issued to agencies, companies, or indi-viduals. Request an application from the Fish Division of the Oregon Depart-ment of Fish and Wildlife, P. O. Box 59, Portland, OR 97207; telephone ( 503) 229- 5410, extension 323. Submit the application at least 1 month before you plan to do the survey in order to be sure the permit can be issued in time. The application requests information about the collection method to be used, when and where collection will be made, and a summary of the proposed project. By law, surveyers must keep records of their collection activities and submit them to the Oregon Department of Fish and Wildlife. Surveys using the visual observation method ( including snorkeling) do not require any licenses or permits because fish are not physically collected. Sampling with the hook- and- line method during open fishing seasons requires only a valid angling license. However, Oregon resident landowners and their immediate families do not need angling licenses to fish on land they own and live on. In either case, the general ahgling regulations for the stream must be followed during hook- and- line sampling unless a Scientific Collection Permit is obtained. Additional restrictions on survey efforts may apply if the stream contains species that the state or federal government lists as sensitive, threatened, or endangered species. Please contact your local ODFW office to find out whether any of these species are likely to be in streams you plan to sample. Reporting survey results Give survey data to the local ODF district office so that district Stream Classi-fication Maps can be updated. On page 19 is a blank survey report form. It asks for information about the location of the stream; the methods, timing, and effort of the survey; the physical character of the stream; observations of fish and wildlife; and the presence of natural or human- created barriers to fish passage. complete one form for each stream reach where fish were ob-served or fish use was found to end. See Figure 3 ( page 12) for descriptions of some fish species common to $ mall, forested streams; these may help to identify fish seen during surveys. Detailed instructions for completing the survey form are on pages 14 through 18. Attach to the Fish Presence Survey Form a copy of the ODF Stream ClassM-cation Map for the surveyed area or, if that is not available, a copy of the 7.5 minute USGS topographic map for the area. Note the following information on the map. ( Examples of completed survey report forms and maps are on pages 21 through 30.) The area of the stream that was actually surveyed ( including the areas without fish) as part of the survey effort. Highlight in yellow the entire stream reach surveyed ( see examples on pages 25,28, and 30). The upper limit of fish use. Note this on the map by drawing a line across the stream and writing the letter F at that point. The name of the surveyor. The date the stream was surveyed. GENUS ONCORHYNCUS - PACIFIC SALMON IOENTIFICATION FEATURES OF JUVENILES Faint parr marks. extend little. if am: below latanl line. Lures SOCKEYE w GENUS ONCORHYNCUS- TROUT IDENTIFICATIOEI FUTURES OF JUVENILES pols in dorsal Teeth on of tongue Maxillary extend past rear margin on throat W - Of eye CUTTHROAT 5 - I 0 parr marks on ridge ahead of dorsal tongue astend & st rear mark on throat Y; V margin of eye STEELHEAD- RAINBOW Few or no spots i n tail Figure 3. Identification characteristics of some juvenile salmon and trout species that may be observed in forested streams. 3. Permission to enter private forest lands should be obtained from all land-owners before the surveys are conducted. 4. Fish- presence surveys should then be made according to the guidelines given in this publication. 5. The required survey information, recorded on the Fish Presence Survey Form and maps, should be given to the local ODF district office. 6. The ODF office will give copies of the completed survey forms and maps to the local office of the Oregon Department of Fish and Wildlife. 7. The Department of Forestry will review the information, usually in consul-tation with the Oregon Department of Fish and Wildlife, to determine whether the survey results are reliable. 8. Based on its assessment of data reliability, the Department of Forestry will make appropriate changes to the ODF Stream Classification Maps. 9. All affected landowners will be notified of the proposed stream classifica-tion changes, according to the notification rules ( OAR 629- 57- 2110( 2)). Instructions for completing the survey report form The following information should be reported on the Fish Presence Survey Form. These instructions are in the order that the information appears on the form. Complete one form for each stream reach or branch where fish were observed or fish use was found to end. This may require assigning codes to unnamed tributaries ( for example, " trib. a," " trib. b") so that survey data can be cross- referenced to the survey maps. Please refer to examples on pages 21 through 29. Surveyor Narne( s): The name of the person or persons responsible for con-ducting the survey and reporting the results. AgencyfCompany: The name of the agency or company that employs the surveyor ( if applicable). Landowner: The name of the landowner of the reach surveyed. Mailing Address and Phone: The address and phone number for the person responsible for the survey. Stream: The name of the stream as reported on the USGS or ODF Stream Classification Map for the area. If the stream is unnamed, report the stream as " unnamed" and list the tributary that it flows into (" Tributary to..."). Tributary to: The name of the main stream ( as reported on the USGS or ODF map) that the surveyed stream flows into. This is especially important if the surveyed stream is unnamed. Quad Map: The name of the USGS 7.5 minute topographic map that includes the reach of the stream surveyed. If the surveyed reach covers more than one quad map, report first the name of the map that shows the identified end- point of fish use and then give the other maps' names. Location: A legal description ( township, range, and section to at least the quarter section) of the location where fish use ends. Date Surveyed: The month, day, and year the fish survey was conducted. Survey Method: Check the box for the survey method used. If more than one method was used, check all that apply and note the most often used method in the comments section or in the form's margin. Survey Amount Above End of Fish Use: The length of stream reach that was surveyed immediately upstream of the identified end of fish use. Estimate ( in feet) the length surveyed, and give the number of pools sampled for fish in that section. A survey to prove the absence of fish must sample at least 50 yards of stream and at least six pools immediately upstream of the end of fish use. In addition, any upstream beaver ponds must also be sampled. Flow Level: The flow conditions at the time of the survey. Use the following categories of flow. Low: Ranges from a series of isolated pools to flowing across less than 75 percent of the average bankfull width. Moderate: Surface water is flowing across 75 to 90 percent of the average bankfull width. High: Surface water flowing across more than 90 percent of the average bankfull width. It is not recommended thatfih presence surveys be conducted at high jlows. Weather: The weather during most of the fish survey ( rainy, overcast, partly cloudy, sunny, snowy, etc.). Water Clarity: The water visibility during the survey. Use the following categories of water visibility. Clear: Visibility is good in pools, deep pools, and riffles. Moderate: Visibility is good only in riffles and shallow pools. Turbid: Visibility is poor in both riffles and pools. It is not recommended that fih presence surveys be conducted when water is turbid. Water Temperature ( optional): The temperature of the stream ( in degrees Farenheit) at the time of the survey. Fish observations Report the species and approximate size ranges of fish observed in the sur-veyed reach. Use Figure 3 ( page 12) as a guide to identifying some game fish species commonly found in small, forested streams. Use the following codes and instructions to complete this section. Species: Use the following names or codes to report fish observed during the survey. If you observe a species not listed here, such as Pacific lamprey, use its common name. Name Species Code Coho salmon Co Cutthroat trout Ct Rainbow troutfsteelhead Rb/ St Bull trout BUT Brook trout BT Unknown salmonid UnS Sizes: Report the size range of fish, in inches, by species. For example, the size range of coho observed could be reported as " 1- 4 inches." If you see several sizes of one species ( for example, some cutthroat trout in the " 1- to 2- inch range and others in the " 6- to 8- inch" range), list them separately. Aquatic wildlife The types of aquatic wildlife that may be observed include tailed frogs ( includ-ing juvenile " tadpoles"), Pacific giant salamanders, and Olympic salamanders. Species: Give the common name of the species, if known. If you don't know the species name, at least report observations by a general name such as " salamanders." Number: The number of aquatic wildlife in each species or group observed. Physical stream data Report the physical characteristics of the stream in the vicinity of the end- point of fish use. Report information separately for ( 1) the section immediately at and downstream of the end of fish use, and ( 2) the area upstream of the maximum extent of fish use. Following are specific instructions for collecting this information. Bankfull Channel Width: By eye, estimate the average width ( in feet) of the bankfull channel for the 100- foot sections above and below the end- point of fish use. The bankfull channel is the area that is scoured by water during average high flows. The edge of the bankfull channel can be identified by looking for changes in vegetation, in soils and litter characteristics, or in the shape of the bank. The bank often will abruptly change slope at the bankfull boundary. Vegetation at the boundary often changes from annual vegetation ( such as grasses) to more permanent vegetation such as trees and shrubs. Estimate the width across the channel between the edges of the bankfull level. Current Wetted Width: Visually estimate the average width ( in feet) of the channel that contains flow ( is wetted) at the time of the survey. Report the estimated averages for the 100- foot sections above and below the end of fish use. Channel Gradient: Measure the average stream gradient with a clinometer for the 100- foot sections above and below the end of fish use. me a piece of flagging at eye level on a branch or shrub, walk up or down the stream bank, and then use the clinometer to sight on the flagging while you are standing on the channel bottom. Read and report the percent gradient. ODF Stream Class Size: The stream size (" small," " medium," or " large") from the ODF Stream Classification Maps for the reaches immediately above and downstream of the end of fish use. Natural barriers This information is very important for understanding relationships between the presence of fish and the physical characteristics of the stream. Understanding these relationships can help determine where fish- presence surveys should be concentrated and help predict where fish are likely to occur if survey informa-tion is not yet available. Generally, natural barriers are permanent structures such as falls or vertical drops more than 8 to 10 feet high for salmon or steel-head or 4 feet high for trout. Log jams, drops over logs, beaver dams, or other organic structures generally are only temporary barriers to fish passage, but report them as well. If fish use ends at a natural barrier, such as a waterfall, bedrock chute or cascades, describe the conditions at the site. Include a description of: ( 1) the type of barrier, ( 2) the approximate height ( in feet), ( 3) the percentage of slope, ( 4) the length ( in feet) of the bedrock chute or cascades, and ( 5) any other conditions that may be limiting fish passage. If the potential barrier is a bedrock chute, note whether the bedrock contains pools or rough features ( such as rocks, boulders, or other breaks in the flow), or whether the water flows in an even, shallow pattern over the bedrock. Please note on the survey map the locations of any natural barriers encountered. If you encounter a natural barrier, also be sure to sample above this point because fish often are found above natural barriers. Road- crossing barriers This information also is very important for understanding relationships be-tween the presence of fish and the physical characteristics of the stream. Road-crossing barriers can alter the relationships. If fish use ends at a road- crossing barrier, such as a culvert, describe the conditions at the site. Describe the type of barrier and its measurements at the time of the survey such as ( 1) the diameter of the culvert, in inches, ( 2) the depth ( in inches) of water in the culvert, ( 3) the height ( in feet) of the jump ( drop) below the culvert or structure, ( 4) the depth ( in inches or feet) of the plunge pool below the culvert outfall, ( 5) the gradient or slope of the culvert, given as a percentage as read off a clinometer, ( 6) the length ( in feet) of the culvert, and ( 7) any other factors that could affect fish passage. Please note on the survey map the locations of any road- crossing barriers, even if they are not at the end- point of fish use. As with natural barriers, be sure also to sample above the site because fish often are found above road- crossing barriers. Other comments Any other comments or notations that you think may be pertinent to the fish survey. It helps to describe any notable habitat characteristics, for example " lots of instream wood," " very few pools in the reach," " heavy silt load in the stream." Use the reverse side of the form if necessary. FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): Agency: Land Owner: Mailing Address: Phone: Date Surveyed: Stream: Tributary to: Quad Map: Location: T R Sec. Survey Method ( d): 0 Electroshocker 0 h & g 0 Visual Survey Above End of Fish Use: Distance ( feet) Number of Pools Flow Level ( d): 0 Low 17 Moderate High Weather: Water Temperature: Water Clarity ( d): Clear 17 Moderate 17 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. Other comments ( use reverse side if necessary): FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): . be Sorveq , 3 Troo+, FI s h G n r u l l , I*? , S.; L. Agency: N/ C I Land Owner: k! 4~ 4f, l T; M ~ C C Mailing address:?.^. sox ~ g~,\ L L I M UF~ A \ ID~ R) jC? suo Phone: BSB- 5555 ate surveyed: A p ( ; i 2 8, ! ?? s I Stream: Un hawed , " Tr I b R!' Tributary to: lr3 F . 21 o k so- ~ r a& QuadMap: D\ A &\ dy Location: T 305 R 5 " L Sec. 30, sw/ sto Survey Method ( d): d~ lectroshocker Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) I 86 ' Number of Pools Flow Level ( d): CI Low cd~ oderate High Weather: S owv Water Temperature: 7 O F I Water Clarity ( V): dclear Moderate I7 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE Species I Snes 1 Spedes 1 Quant'ity 1 PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. bk If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. prf+ Other comments ( use reverse side if necessary): f- 15 L wsz ewd 30 $& abov e f *; rd John50~ m ain\ ifi< ~ r o s s i n OH ~ f r e a ~ 7.% ~ 5t redw g d ~ e n f & ry s t u p abde + he a d 4' & sh use - p & f i a n 10%. 2 1 OREGON FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Fish & Wildlife Stream: ~) nr? euce, d " Tr t b, O " Tributary to: w F & n~ oq CC. Quad Map: old &\ A% Location: T 382 R 5E Sec.' 30, si/ Sw I Survey Method ( 4): ~ lectroshocker 0 Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) 2 5' 0 Number of Pools 20 Flow Level ( d): 0 Low d ~ o d e r a t e High Weather: Lw+ Water Temperature: 6 0 F I Water Clarity ( d): dclear Cl Moderate Turbid FISH OBSERVATIONS AQUATIC WILDLIFE Species 1 Snes I! , Species Quantity If fish use ends at a natural bamer, desc ' be the conditions that prevent u stre m fish assage. Fid - 4s 4+ 2 S ' ~ r t i Lm* r? d\. A dJ @ cater also % 15& 5 ( ho& a. r. rp Q5 W F - buffis @ ere fouu\ d . opstr + ye If fish use ehs) at a roa d. crossmng, descnbe conhlons that may prevent upstream fish passage. Other comments ( use reverse side if necessary): w tfw+ were fbU 4 above % z 6 + of (~ la+ erf~ ll above fu 25fcof I sowe years. 22 fail s& i ro fish t@ f& probab/ y vp FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP stream: V A ~ ~ ~ + SC~" T & ~ ributaryto: u. F. 3ehbtja14 Creek Quad Map: old - b a t d ~ Location: T 3 S 5 R 5 E Sec. Survey Method ( d): d~ lectroshocker 0 Anghng 0 Visual Survey Above End of Fish Use: Distance ( feet) a 2 5 Number of Pools 2 Flow Level ( d): 0 Low & oderate 0 High Weather: SvMwv Water Temperature: I Water Clarity ( d): d l e a r 0 Moderate 0 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE - ... . .: : :....: ' ' . . . . . . A , , , .: . . . . , . . , .&& : ! Species ... . ..$ pedes Quantity PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. M/ A If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Stream: West h r k Aobrson Cr eeG Tributary to: Johnrow Cre~ k Quad Map: ( ~ ( 4Ith .\ Ay Location: T 385 R 5 E Sec. 2?,, 5E/ sLJ I Survey Method ( d): dlectroshocker 0 Angling Visual Survey Above End of Fish Use: Distance ( feet) 3 00 Number of Pools t% Flow Level ( V): 0 Low d ~ o d e r ae t High Weather: j , y~ I Water Temperature: 60" F= Water Clarity ( d): & ear Moderate Turbid FISH OBSERVATIONS AQ- U ATIC WILDLIFE t Spedes Quantity 1 I PHYSICAL STREAM DATA + IH n D CtsL 5h-* If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. N I A If fish use ends t a roqj crossiy, describ~ concl~~ tohnats may prevent upstr am fish passa e. ~ hrvctr ert a no? pQ59 ~ c - r b LOWOJQ 4 u. 4 9 ) drop at * rut-/&. b l d a r p fn qr p aI . 7, slop is 6 70 , and w ( onp 7 % fu~ lv er+ 1s ~ chul~ ledb e replace4 t bi s Svmncr. Other comments ( use reverse s~ de~ fn ecessa ): Lower ~ t r c a - q r d r r & a & e + LC cd en. Sf- rm* bb; M Ieok 30a4, but + k shaln. dry up ;* SOW years. FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Mailing Address: ?. c, 3 2 , AJLO ~ L4- T o R 70 00 Phone: b40 - oool Date Surveyed: / Ha v 2 / cj? T I stream: ~ nnclcr- ed , " 7- r; b k " Tributary to: Lobs k c Creek Quad Map: BULL Lrceu Rtdqc Location: T 35 R 2W S ~ C . ~ ~ N € + 4 Survey Method ( d): ~ lectroshocker Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) 300 Number of Pools I 57 Flow Level ( d): 0 Low rd~ oderate High Weather: 7k + lVL * wy Water Temperature: 6 O T-Water Clarity ( d): && ear Moderate Turbid FISH OBSERVATIONS AQUATIC WILDLlFE I , , , ' Species Sies Spedes Quantity If fish use ends, at a natural ba ' er, describe t e conditions that prevent upstream fish passage. The. LZ m c b r u f - ~ V~ L ry 54- p X e u e + he ed$+ t.* use. ~ k rlrcnu, RIIIVC ~ L I : : pain+ I S ~ 4 1 ~ g ~ r L ~ d eo5ve r bai( Lle r S, b+ + his ri- gf obnhi~ n o+ Q b r r r t c r. ' 7 If fish use ends at a road crossing, descn e conditions that may prevent upstream fish passage. U P Other comments ( use reverse side if necessary): N r 4.0r L r ~ s; Wj J bCqPn 5 u ru . + r + he L) wediunn - sws\ l size chaqc, F, sh U ~ CC ~ wJh c r t a d c c y t r ; b ~ + G~ d . ovt WLQ) ew- ker s LLII+. 26 FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): 30 e Cadd i i , Bob hJvrnP1\ Agency: o ba~ ~ a'ndbwner: Lobsfec C r , ~ , , b c c Mailing Address: 7 D. ' 30K 2 , ~ J L pLet~ t , D R DO Phone: 8 YD- o 00 1 Date Surveyed: m4 I/ 2, i? 7- C I f Stream: / ) ~ ~ ~ ~ ek bS "" ~ c Tributaryto: L o b s t e r Lraek Quad Map: B V ' ~ Cr eek ??, d. ie Location: T 73 R 2 0 Sec. 3Y, ~ I. o AA. J G Survey Method ( d): d~ lectroshocker Angling 0 Visual Survey Above End of Fish Use: Distance ( feet) 2 5 0 Number of Pools / D Flow Level ( d): 0 Low d ~ o d e r a t e 0 High Weather: 94, & SU W\ I Water Temperature: 5- 7 " ?= Water Clarity ( d) : Wc1ea. r CI Moderate 0 Turbid FISH OBSERVATIONS AQUATIC WILDLIFE PHYSICAL STREAM DATA Species Sics Spedes If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. Quantity If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. I I Other comments ( use reverse side if necessary): ~ h5ctre um WLS " r y ~ Lw iL tL ~ decy f- goo( r. @. la f is/., observe4 , Ty pr N ~ f . r e u ~ z . FISH PRESENCE SURVEY FORM ATTACH A COPY OF THE 7.5 MINUTE ODF STREAM CLASS MAP Surveyor Name( s): \ ce < . 3ab Tr cut Agency: u/ k2 Mailing ~ ddress: Z3R Rne St , b k n h( e dr ! OR ? d o 0 Phone: ZB?- 3333 Date Surveyed: stream: ~*- aweA Tributary to: c r & QuadMap: G l e w b ~ ~ e k Location: T \ 4 5 R 6 @ Sec. zS,, ~ 3t .+ S-Survey Method ( d): d~ lectroshocker Angling Visual Survey Above End of Fish Use: Distance ( feet) Number of Pools Q Flow Level ( d): 0 Low & oderate High Weather: C( ea c Water Temperature: 5?* F Water Clarity ( d): lW2ear 0 Moderate Turbid FISH OBSERVATIONS AQUATIC WILDLIFE Species Sizes Spedes Quantity PHYSICAL STREAM DATA If fish use ends at a natural barrier, describe the conditions that prevent upstream fish passage. U P If fish use ends at a road crossing, describe conditions that may prevent upstream fish passage. Close

• 41. [Image] Upper Klamath Lake Basin nutrient-loading study: assessment of historic flows in the Williamson and Sprague Rivers

  	"The goal of the project is to quantitatively describe the nature and extent of the ground-water flow systems in the basin."
  	Citation × Citation Citation Abstract Copy Title: Upper Klamath Lake Basin nutrient-loading study: assessment of historic flows in the Williamson and Sprague Rivers Author: Risley, John C. Year: 1999, 2005, 2004 "The goal of the project is to quantitatively describe the nature and extent of the ground-water flow systems in the basin." Title: Upper Klamath Lake Basin nutrient-loading study: assessment of historic flows in the Williamson and Sprague Rivers Author: Risley, John C. Year: 1999, 2005, 2004 "The goal of the project is to quantitatively describe the nature and extent of the ground-water flow systems in the basin." Close

• 42. [Image] Effect of water-column pH on sediment-phosphorus release rates in Upper Klamath Lake, Oregon, 2001

  	Abstract Sediment-phosphorus release rates as a function of pH were determined in laboratory experiments for sediment and water samples collected from Shoalwater Bay in Upper Klamath Lake, Oregon, in 2001. ...
  	Citation × Citation Citation Abstract Copy Title: Effect of water-column pH on sediment-phosphorus release rates in Upper Klamath Lake, Oregon, 2001 Author: Fisher, Lawrence H. Year: 2004, 2005 Abstract Sediment-phosphorus release rates as a function of pH were determined in laboratory experiments for sediment and water samples collected from Shoalwater Bay in Upper Klamath Lake, Oregon, in 2001. Areal release rates for a stable sediment/water interface that is representative of the sediment surface area to water column volume ratio (1:3) observed in the lake and volumetric release rates for resuspended sediment events were determined at three different pH values (8.1, 9.2, 10.2). Ambient water column pH (8.1) was maintained by sparging study columns with atmospheric air. Elevation of the water column pH to 9.2 was achieved through the removal of dissolved carbon dioxide by sparging with carbon dioxide-reduced air, partially simulating water chemistry changes that occur during algal photosynthesis. Further elevation of the pH to 10.2 was achieved by the addition of sodium hydroxide, which doubled average alkalinities in the study columns from about 1 to 2 milliequivalents per liter. Upper Klamath Lake sediments collected from the lake bottom and then placed in contact with lake water, either at a stable sediment/water interface or by resus-pension, exhibited an initial capacity to take up soluble reactive phosphorus (SRP) from the water column rather than release phosphorus to the water column. At a higher pH this initial uptake of phosphorus was slowed, but not stopped. This initial phase was followed by a reversal in which the sediments began to release SRP back into the water column. The release rate of phosphorus 30 to 40 days after suspension of sediments in the columns was 0.5 |ig/L/day (micrograms per liter per day) at pH 8, and 0.9 |ug/L/day at pH 10, indicating that the higher pH increased the rate of phosphorus release by a factor of about two. The highest determined rate of release was approximately 10% (percent) of the rate required to explain the annual internal loading to Upper Klamath Lake from the sediments as calculated from a lake-wide mass balance and observed in total phosphorus data collected at individual locations. Title: Effect of water-column pH on sediment-phosphorus release rates in Upper Klamath Lake, Oregon, 2001 Author: Fisher, Lawrence H. Year: 2004, 2005 Abstract Sediment-phosphorus release rates as a function of pH were determined in laboratory experiments for sediment and water samples collected from Shoalwater Bay in Upper Klamath Lake, Oregon, in 2001. Areal release rates for a stable sediment/water interface that is representative of the sediment surface area to water column volume ratio (1:3) observed in the lake and volumetric release rates for resuspended sediment events were determined at three different pH values (8.1, 9.2, 10.2). Ambient water column pH (8.1) was maintained by sparging study columns with atmospheric air. Elevation of the water column pH to 9.2 was achieved through the removal of dissolved carbon dioxide by sparging with carbon dioxide-reduced air, partially simulating water chemistry changes that occur during algal photosynthesis. Further elevation of the pH to 10.2 was achieved by the addition of sodium hydroxide, which doubled average alkalinities in the study columns from about 1 to 2 milliequivalents per liter. Upper Klamath Lake sediments collected from the lake bottom and then placed in contact with lake water, either at a stable sediment/water interface or by resus-pension, exhibited an initial capacity to take up soluble reactive phosphorus (SRP) from the water column rather than release phosphorus to the water column. At a higher pH this initial uptake of phosphorus was slowed, but not stopped. This initial phase was followed by a reversal in which the sediments began to release SRP back into the water column. The release rate of phosphorus 30 to 40 days after suspension of sediments in the columns was 0.5 |ig/L/day (micrograms per liter per day) at pH 8, and 0.9 |ug/L/day at pH 10, indicating that the higher pH increased the rate of phosphorus release by a factor of about two. The highest determined rate of release was approximately 10% (percent) of the rate required to explain the annual internal loading to Upper Klamath Lake from the sediments as calculated from a lake-wide mass balance and observed in total phosphorus data collected at individual locations. Close

• 43. [Image] Relation between selected water-quality variables and lake level in Upper Klamath and Agency Lakes, Oregon

  	Relation Between Selected Water-Quality Constituents and Lake Stage in Upper Klamath and Agency Lakes, Oregon By Tamara M. Wood, Gregory J. Fuhrer, and Jennifer L. Morace SUMMARY Upper Klamath Lake is ...
  	Citation × Citation Citation Abstract Copy Title: Relation between selected water-quality variables and lake level in Upper Klamath and Agency Lakes, Oregon Author: Wood, Tamara M. Year: 1996, 2005, 2004 Relation Between Selected Water-Quality Constituents and Lake Stage in Upper Klamath and Agency Lakes, Oregon By Tamara M. Wood, Gregory J. Fuhrer, and Jennifer L. Morace SUMMARY Upper Klamath Lake is a large (140 square-mile), shallow (mean depth about 8 ft) lake in south-central Oregon that the historical record indicates has been eutrophic since its discovery by non-Native Americans. In recent decades, however, the lake has had annual occurrences of near-monoculture blooms of the blue-green alga Aphanizomenon flos-aquae. In 1988 two sucker species endemic to the lake, the Lost River sucker (Deltistes luxatus) and the shortnose sucker (Chasmistes brevirostris), were listed as endangered by the U.S. Fish and Wildlife Service, and it has been proposed that the poor water quality conditions associated with extremely long and productive blooms are contributing to the decline of those species. It has also been proposed that the low lake levels made possible by the construction of a dam at the outlet from the lake in 1921 have contributed to worsening water quality through a variety of possible mechanisms (Jacob Kann, Klamath Tribes, written com-mun., 1995). One such mechanism would be an increase in internal phosphorus loading from resuspended sediments (Jacoby and others, 1982), resulting from an increase in bottom shear stresses at lower lake levels (Laenen and LeTourneau, 1996), leading in turn to more intense algal blooms. Another possible mechanism is an earlier triggering of algal blooms. When early spring lake levels are low, greater light intensity at the sediment surface might speed recruitment of algal cells from the sediments. Sediment recruitment has been shown to be an important contributor to water column biomass increases in A. flos aquae (Barbiero and Kann, 1994) and Gloeotrichia echinulata (Barbiero, 1993). An earlier bloom could result in poor water quality conditions occurring earlier in the year, when young-of-the-year fish may be more susceptible to those conditions. Lake level can also influence water quality directly. An increased frequency of sediment resuspension at lower lake levels could increase chemical and biological oxygen demand, resulting in decreased dissolved oxygen concentrations. Sediment oxygen demand also may be enhanced at lower lake levels because it is concentrated over a smaller volume of water. Some compensation for increased oxygen demand at lower lake levels might be provided by increased reaeration, if the water column mixes from top to bottom more frequently. Based on the analysis of data that they have been collecting for several years, the Klamath Tribes recently recommended that the Bureau of Reclamation (Reclamation) modify the operating plan for the dam to make the minimum lake levels for the June-August period more closely resemble pre-dam conditions (Jacob Kann, written commun., 1995). The U.S. Geological Survey (USGS) was asked to analyze the available data for the lake and to assess whether the evidence exists to conclude that year-to-year differences in certain lake water-quality variables are related to year-to-year differences in lake level. The results of the analysis will be used as scientific input in the process of developing an operating plan for the Link River Dam. Datasets Two water-quality datasets were analyzed. The first was a series of hourly records of pH, dissolved oxygen, and water temperature, each of approximately a week's duration. The records were collected at 3 sites over 3 years, 1992 through 1994, with enough consistency to define the seasonal patterns. This dataset provided information about the diel extremes in dissolved oxygen and pH and the seasonal pattern in the diel cycle, but measurements were limited to a depth of 1 m(3.28 ft). The second dataset was a set of depth profiles of pH and dissolved oxygen and concurrent depth-integrated samples for nutrients and chlo-rophyll-a. The profiles were collected at approximately biweekly intervals at nine sites (seven in Upper Klamath and two in Agency Lake) over the 5 years 1990 through 1994. These depth profiles provided information on the depth-dependence of dissolved oxygen and pH, and allowed more extensive year-to-year comparisons than did the hourly records. Because measurements were made at each site only once during the sampling day, however, they did not capture the daily extremes in water quality. Lake level is measured daily by the USGS at three sites around the lake: Rocky Point, Rattlesnake Point, and near the city of Klamath Falls. These daily measurements are then used to compute a spatially weighted average of the lake level that is reported in the USGS annual Water-Data Report for Oregon. The average lake levels were used in this report. Two climatic datasets were used in this report; both were collected at the Klamath Falls airport. Air temperature was recorded as a daily maximum and daily minimum value. Cloud cover was quantized on a daily basis into one of seven levels. Because the focus of this study was primarily to examine possible relations between water quality and lake level, the lake level data provide an important context for the discussions that follow. Title: Relation between selected water-quality variables and lake level in Upper Klamath and Agency Lakes, Oregon Author: Wood, Tamara M. Year: 1996, 2005, 2004 Relation Between Selected Water-Quality Constituents and Lake Stage in Upper Klamath and Agency Lakes, Oregon By Tamara M. Wood, Gregory J. Fuhrer, and Jennifer L. Morace SUMMARY Upper Klamath Lake is a large (140 square-mile), shallow (mean depth about 8 ft) lake in south-central Oregon that the historical record indicates has been eutrophic since its discovery by non-Native Americans. In recent decades, however, the lake has had annual occurrences of near-monoculture blooms of the blue-green alga Aphanizomenon flos-aquae. In 1988 two sucker species endemic to the lake, the Lost River sucker (Deltistes luxatus) and the shortnose sucker (Chasmistes brevirostris), were listed as endangered by the U.S. Fish and Wildlife Service, and it has been proposed that the poor water quality conditions associated with extremely long and productive blooms are contributing to the decline of those species. It has also been proposed that the low lake levels made possible by the construction of a dam at the outlet from the lake in 1921 have contributed to worsening water quality through a variety of possible mechanisms (Jacob Kann, Klamath Tribes, written com-mun., 1995). One such mechanism would be an increase in internal phosphorus loading from resuspended sediments (Jacoby and others, 1982), resulting from an increase in bottom shear stresses at lower lake levels (Laenen and LeTourneau, 1996), leading in turn to more intense algal blooms. Another possible mechanism is an earlier triggering of algal blooms. When early spring lake levels are low, greater light intensity at the sediment surface might speed recruitment of algal cells from the sediments. Sediment recruitment has been shown to be an important contributor to water column biomass increases in A. flos aquae (Barbiero and Kann, 1994) and Gloeotrichia echinulata (Barbiero, 1993). An earlier bloom could result in poor water quality conditions occurring earlier in the year, when young-of-the-year fish may be more susceptible to those conditions. Lake level can also influence water quality directly. An increased frequency of sediment resuspension at lower lake levels could increase chemical and biological oxygen demand, resulting in decreased dissolved oxygen concentrations. Sediment oxygen demand also may be enhanced at lower lake levels because it is concentrated over a smaller volume of water. Some compensation for increased oxygen demand at lower lake levels might be provided by increased reaeration, if the water column mixes from top to bottom more frequently. Based on the analysis of data that they have been collecting for several years, the Klamath Tribes recently recommended that the Bureau of Reclamation (Reclamation) modify the operating plan for the dam to make the minimum lake levels for the June-August period more closely resemble pre-dam conditions (Jacob Kann, written commun., 1995). The U.S. Geological Survey (USGS) was asked to analyze the available data for the lake and to assess whether the evidence exists to conclude that year-to-year differences in certain lake water-quality variables are related to year-to-year differences in lake level. The results of the analysis will be used as scientific input in the process of developing an operating plan for the Link River Dam. Datasets Two water-quality datasets were analyzed. The first was a series of hourly records of pH, dissolved oxygen, and water temperature, each of approximately a week's duration. The records were collected at 3 sites over 3 years, 1992 through 1994, with enough consistency to define the seasonal patterns. This dataset provided information about the diel extremes in dissolved oxygen and pH and the seasonal pattern in the diel cycle, but measurements were limited to a depth of 1 m(3.28 ft). The second dataset was a set of depth profiles of pH and dissolved oxygen and concurrent depth-integrated samples for nutrients and chlo-rophyll-a. The profiles were collected at approximately biweekly intervals at nine sites (seven in Upper Klamath and two in Agency Lake) over the 5 years 1990 through 1994. These depth profiles provided information on the depth-dependence of dissolved oxygen and pH, and allowed more extensive year-to-year comparisons than did the hourly records. Because measurements were made at each site only once during the sampling day, however, they did not capture the daily extremes in water quality. Lake level is measured daily by the USGS at three sites around the lake: Rocky Point, Rattlesnake Point, and near the city of Klamath Falls. These daily measurements are then used to compute a spatially weighted average of the lake level that is reported in the USGS annual Water-Data Report for Oregon. The average lake levels were used in this report. Two climatic datasets were used in this report; both were collected at the Klamath Falls airport. Air temperature was recorded as a daily maximum and daily minimum value. Cloud cover was quantized on a daily basis into one of seven levels. Because the focus of this study was primarily to examine possible relations between water quality and lake level, the lake level data provide an important context for the discussions that follow. Close

• 44. [Image] Programmatic environmental assessment for Klamath Basin Ecosystem Restoration Office Projects, 2000-2010

  	Programmatic Environmental Assessment Summary This Environmental Assessment (EA) provides compliance with the National Environmental Policy Act (NEPA) for restoration actions undertaken by the US Fish ...
  	Citation × Citation Citation Abstract Copy Title: Programmatic environmental assessment for Klamath Basin Ecosystem Restoration Office Projects, 2000-2010 Author: U.S. Fish and Wildlife Service. Klamath Basin Ecosystem Restoration Office. Year: 2000, 2005, 2004 Programmatic Environmental Assessment Summary This Environmental Assessment (EA) provides compliance with the National Environmental Policy Act (NEPA) for restoration actions undertaken by the US Fish & Wildlife Service's Klamath Basin Ecosystem Restoration Office (ERO) in Klamath Falls, Oregon. These restoration activities are needed due to the large-scale loss of wetland and riparian habitat and degraded water quality. The purpose of these restoration efforts is the improvement of conditions of the watershed with specific regard to habitat and water quality, resulting in, among other benefits, improved conditions for the endangered fish species (bull trout and Lost River and shortnose sucker) populations of the basin. The geographic scope of this EA is defined as the upper Klamath River basin, including the entire watershed from Irongate Dam upstream to the headwaters. This EA is intended to provide NEPA compliance for restoration projects conducted between the years 2000 and 2010. The ERO was established in 1993 to sponsor and assist with a variety of restoration activities in the Klamath Basin. The ERO funds and provides technical assistance to restoration projects involving private landholders, concerned groups, and other state, federal, and tribal agencies. Four alternatives are presented in this EA. The proposed alternative (Alternative 1) consists of a comprehensive program of ecosystem restoration, promoting projects in both riparian areas and in upland habitats. This would continue the current program in effect since 1994. NEPA compliance would primarily be carried out via a single, programmatic document saving time and funds. The Fish & Wildlife Service proposes to fund and administer the following projects types: Riparian Projects: (fencing for livestock management; native plant establishment & diversification; non-native plant removal/control; erosion control; contour re-establishment; impoundment removal; wildlife habitat improvements) Wetland Projects: (fencing; wetland restoration and enhancement; wildlife habitat improvements) Upland or Road Projects: (road abandonment, decommissioning, & obliteration; road drainage improvements and storm proofing, re-establishment of historic contours; silvicultural treatments; native plant establishment/diversification; non-native plant removal/control; fencing; landslide treatments; culvert/stream crossing upgrades; erosion control; wildlife habitat improvements). In-stream Projects: (habitat complexity and diversity improvements; hydrologic regime improvements; coarse woody debris supplementation; natural or artificial barrier removal, modification &/or creation; fish screens installation). Alternative 2 would concentrate restoration efforts only on riparian, instream, and wetland areas. Road projects would be conducted only within the riparian corridor, as defined. NEPA compliance would also be conducted programmatically. Alternative 3 would cease all restoration activities conducted and funded by the ERO in the Klamath Basin. This alternative would serve as a benchmark against which the effects of the restoration alternatives discussed above can be compared. Alternative 4, the "No Action" alternative, would continue current management policies with regard to NEPA compliance, providing compliance on a project by project basis requiring independent analysis for each project. The affected environment of the region is described in detail. The environment has been changed significantly since the 1890's due to logging, agriculture and urban development. An extensive system of dams, canals, and drainage structures has resulted in the conversion of approximately 80% of pre-settlement wetlands to agricultural uses. Riparian corridors have been similarly impacted, and upland forests regions have been affected by logging, road construction and other factors. These changes have contributed to problems with the water quality in the region, contributing to the listing of several fish species as threatened or endangered; loss of habitat has affected a large number of other species as well. The environmental effects of each alternative is analyzed. Some short term negative impacts could occur as a result of the projects authorized by both Alternative 1 and Alternative 2, but these would be strongly offset by the expected beneficial results to water quality and habitat conditions. Alternative 1 would be expected to have a greater overall effect on the environment than Alternative 2, since many of the underlying factors with which restoration efforts are concerned originate in upland conditions (i.e. sedimentation and hydrologic functionality). Alternative 3 would result in conditions remaining much as they are currently, although other programs and organizations are making efforts at restoration activities. The environmental impacts of individual projects anticipated under Alternative 4 would be generally the same as for similar projects under Alternative 1. The primary difference between the two alternatives would be the higher efficiency and improved cumulative analysis resulting from a programmatic approach as proposed in Alternative 1. Public participation in the NEPA process has been, and will continue to be, solicited and welcomed. Compliance with state and federal laws and regulations such as the Clean Water Act, National Historic Preservation Act, and the Endangered Species Act, as well as guidelines for contaminant surveys, will be carried out as detailed. While these projects are expected to play an important role in the restoration of the region, none of these alternatives are expected to have a significant impact when compared with the loss of wetland, riparian and upland habitats over the past century, impacts which do occur would be of a cumulatively beneficial nature. Other restoration efforts are being carried out in the area by other governmental and private groups, and it is expected that these combined efforts will achieve important beneficial results for the ecosystem. Title: Programmatic environmental assessment for Klamath Basin Ecosystem Restoration Office Projects, 2000-2010 Author: U.S. Fish and Wildlife Service. Klamath Basin Ecosystem Restoration Office. Year: 2000, 2005, 2004 Programmatic Environmental Assessment Summary This Environmental Assessment (EA) provides compliance with the National Environmental Policy Act (NEPA) for restoration actions undertaken by the US Fish & Wildlife Service's Klamath Basin Ecosystem Restoration Office (ERO) in Klamath Falls, Oregon. These restoration activities are needed due to the large-scale loss of wetland and riparian habitat and degraded water quality. The purpose of these restoration efforts is the improvement of conditions of the watershed with specific regard to habitat and water quality, resulting in, among other benefits, improved conditions for the endangered fish species (bull trout and Lost River and shortnose sucker) populations of the basin. The geographic scope of this EA is defined as the upper Klamath River basin, including the entire watershed from Irongate Dam upstream to the headwaters. This EA is intended to provide NEPA compliance for restoration projects conducted between the years 2000 and 2010. The ERO was established in 1993 to sponsor and assist with a variety of restoration activities in the Klamath Basin. The ERO funds and provides technical assistance to restoration projects involving private landholders, concerned groups, and other state, federal, and tribal agencies. Four alternatives are presented in this EA. The proposed alternative (Alternative 1) consists of a comprehensive program of ecosystem restoration, promoting projects in both riparian areas and in upland habitats. This would continue the current program in effect since 1994. NEPA compliance would primarily be carried out via a single, programmatic document saving time and funds. The Fish & Wildlife Service proposes to fund and administer the following projects types: Riparian Projects: (fencing for livestock management; native plant establishment & diversification; non-native plant removal/control; erosion control; contour re-establishment; impoundment removal; wildlife habitat improvements) Wetland Projects: (fencing; wetland restoration and enhancement; wildlife habitat improvements) Upland or Road Projects: (road abandonment, decommissioning, & obliteration; road drainage improvements and storm proofing, re-establishment of historic contours; silvicultural treatments; native plant establishment/diversification; non-native plant removal/control; fencing; landslide treatments; culvert/stream crossing upgrades; erosion control; wildlife habitat improvements). In-stream Projects: (habitat complexity and diversity improvements; hydrologic regime improvements; coarse woody debris supplementation; natural or artificial barrier removal, modification &/or creation; fish screens installation). Alternative 2 would concentrate restoration efforts only on riparian, instream, and wetland areas. Road projects would be conducted only within the riparian corridor, as defined. NEPA compliance would also be conducted programmatically. Alternative 3 would cease all restoration activities conducted and funded by the ERO in the Klamath Basin. This alternative would serve as a benchmark against which the effects of the restoration alternatives discussed above can be compared. Alternative 4, the "No Action" alternative, would continue current management policies with regard to NEPA compliance, providing compliance on a project by project basis requiring independent analysis for each project. The affected environment of the region is described in detail. The environment has been changed significantly since the 1890's due to logging, agriculture and urban development. An extensive system of dams, canals, and drainage structures has resulted in the conversion of approximately 80% of pre-settlement wetlands to agricultural uses. Riparian corridors have been similarly impacted, and upland forests regions have been affected by logging, road construction and other factors. These changes have contributed to problems with the water quality in the region, contributing to the listing of several fish species as threatened or endangered; loss of habitat has affected a large number of other species as well. The environmental effects of each alternative is analyzed. Some short term negative impacts could occur as a result of the projects authorized by both Alternative 1 and Alternative 2, but these would be strongly offset by the expected beneficial results to water quality and habitat conditions. Alternative 1 would be expected to have a greater overall effect on the environment than Alternative 2, since many of the underlying factors with which restoration efforts are concerned originate in upland conditions (i.e. sedimentation and hydrologic functionality). Alternative 3 would result in conditions remaining much as they are currently, although other programs and organizations are making efforts at restoration activities. The environmental impacts of individual projects anticipated under Alternative 4 would be generally the same as for similar projects under Alternative 1. The primary difference between the two alternatives would be the higher efficiency and improved cumulative analysis resulting from a programmatic approach as proposed in Alternative 1. Public participation in the NEPA process has been, and will continue to be, solicited and welcomed. Compliance with state and federal laws and regulations such as the Clean Water Act, National Historic Preservation Act, and the Endangered Species Act, as well as guidelines for contaminant surveys, will be carried out as detailed. While these projects are expected to play an important role in the restoration of the region, none of these alternatives are expected to have a significant impact when compared with the loss of wetland, riparian and upland habitats over the past century, impacts which do occur would be of a cumulatively beneficial nature. Other restoration efforts are being carried out in the area by other governmental and private groups, and it is expected that these combined efforts will achieve important beneficial results for the ecosystem. Close

• 45. [Image] Crisis to consensus : restoration planning for the Upper Klamath Basin

  	Executive Summary This report presents the Upper Klamath Basin Working Group's (Working Group) recommendations for the development and implementation of a restoration plan for the Upper Klamath Basin. ...
  	Citation × Citation Citation Abstract Copy Title: Crisis to consensus : restoration planning for the Upper Klamath Basin Author: Upper Klamath Basin Working Group Year: 2002, 2005, 2004 Executive Summary This report presents the Upper Klamath Basin Working Group's (Working Group) recommendations for the development and implementation of a restoration plan for the Upper Klamath Basin. In 1996, the 104th Congress of the United States chartered the Upper Klamath Basin Working Group (Public Law 104-333 - the Oregon Resources Conservation Act) to develop a plan for the Upper Basin that focuses on enhancing ecosystem restoration, improving economic stability, and minimizing impacts associated with drought on all resources and stakeholders. The Working Group is comprised of over 30 individuals appointed by the Governor of Oregon, representing federal, state, and local governments and agencies; the Klamath Tribes; conservation organizations; farmers and ranchers; and industry and local businesses. The objective of the Working Group is to develop and oversee a restorative course of action that allows for mutually beneficial gains for stakeholders wherein everybody in the Upper Basin can achieve positive, affirming results together, and where no one is left economically, culturally, or spiritually disadvantaged. Chapter 1 of this report presents a brief summary of the history of the Working Group and the conditions leading to the development of this effort. Chapter 2 describes the facilitated "interim planning process" the Working Group engaged in between April 2001 and July 2002. Chapter 3 presents the results of the interim planning process including key recommendations regarding Working Group decision-making and operating rules, technical data needs, future cost and time frame of the restoration planning process, and similar planning decisions. Chapter 4 describes the next steps and actions the Working Group is prepared to take to lead the restoration planning process. The Working Group's goals and objectives will be achieved through the Working Group's continued commitment to public outreach, collaborative problem solving, and implementation of real world solutions. Desired outcomes from implementation of the restoration plan include, but are not limited to, the following: improved water quality through the implementation of accepted Best Management Practices; restoration of wetlands and riparian habitat; enhancement of natural and structural water storage; improvements to irrigation efficiency and water conservation; economic growth and diversity through activities such as value added natural resource products and ecotourism; and enhancement of wildlife Tribal Trust resources. Title: Crisis to consensus : restoration planning for the Upper Klamath Basin Author: Upper Klamath Basin Working Group Year: 2002, 2005, 2004 Executive Summary This report presents the Upper Klamath Basin Working Group's (Working Group) recommendations for the development and implementation of a restoration plan for the Upper Klamath Basin. In 1996, the 104th Congress of the United States chartered the Upper Klamath Basin Working Group (Public Law 104-333 - the Oregon Resources Conservation Act) to develop a plan for the Upper Basin that focuses on enhancing ecosystem restoration, improving economic stability, and minimizing impacts associated with drought on all resources and stakeholders. The Working Group is comprised of over 30 individuals appointed by the Governor of Oregon, representing federal, state, and local governments and agencies; the Klamath Tribes; conservation organizations; farmers and ranchers; and industry and local businesses. The objective of the Working Group is to develop and oversee a restorative course of action that allows for mutually beneficial gains for stakeholders wherein everybody in the Upper Basin can achieve positive, affirming results together, and where no one is left economically, culturally, or spiritually disadvantaged. Chapter 1 of this report presents a brief summary of the history of the Working Group and the conditions leading to the development of this effort. Chapter 2 describes the facilitated "interim planning process" the Working Group engaged in between April 2001 and July 2002. Chapter 3 presents the results of the interim planning process including key recommendations regarding Working Group decision-making and operating rules, technical data needs, future cost and time frame of the restoration planning process, and similar planning decisions. Chapter 4 describes the next steps and actions the Working Group is prepared to take to lead the restoration planning process. The Working Group's goals and objectives will be achieved through the Working Group's continued commitment to public outreach, collaborative problem solving, and implementation of real world solutions. Desired outcomes from implementation of the restoration plan include, but are not limited to, the following: improved water quality through the implementation of accepted Best Management Practices; restoration of wetlands and riparian habitat; enhancement of natural and structural water storage; improvements to irrigation efficiency and water conservation; economic growth and diversity through activities such as value added natural resource products and ecotourism; and enhancement of wildlife Tribal Trust resources. Close

• 46. [Image] An examination of the Klamath Basin crisis : restructuring the discourse within an identity-based framework

  	Thesis (B.A.) -- Whitman College, 2002; Includes bibliographical references (leaves 79-83)
  	Citation × Citation Citation Abstract Copy Title: An examination of the Klamath Basin crisis : restructuring the discourse within an identity-based framework Author: Dornsife, Alison M. Year: 2002, 2005, 2004 Thesis (B.A.) -- Whitman College, 2002; Includes bibliographical references (leaves 79-83) Title: An examination of the Klamath Basin crisis : restructuring the discourse within an identity-based framework Author: Dornsife, Alison M. Year: 2002, 2005, 2004 Thesis (B.A.) -- Whitman College, 2002; Includes bibliographical references (leaves 79-83) Close

• 47. [Image] Irrigation system maintenance, groundwater quality, and improved production

  	"April 2004"; Includes bibliographical references (p. 3).
  	Citation × Citation Citation Abstract Copy Title: Irrigation system maintenance, groundwater quality, and improved production Author: Selker, John S. Year: 2004, 2005 "April 2004"; Includes bibliographical references (p. 3). Title: Irrigation system maintenance, groundwater quality, and improved production Author: Selker, John S. Year: 2004, 2005 "April 2004"; Includes bibliographical references (p. 3). Close

• 48. [Image] Sediment oxygen demand in Upper Klamath and Agency Lakes, Oregon, 1999

  	SIGNIFICANT FINDINGS The distribution of SOD2q values (measured sediment oxygen demand values corrected to 20°C [degrees Celsius]) had a median value of 1.6 g/m2/day (grams per square meter per day) in ...
  	Citation × Citation Citation Abstract Copy Title: Sediment oxygen demand in Upper Klamath and Agency Lakes, Oregon, 1999 Author: Wood, Tamara M. Year: 2001, 2005, 2004 SIGNIFICANT FINDINGS The distribution of SOD2q values (measured sediment oxygen demand values corrected to 20°C [degrees Celsius]) had a median value of 1.6 g/m2/day (grams per square meter per day) in the spring and 1.7 g/m2/day in the late summer. These values were well within the range of values in the literature for sites with similar sediment characteristics: primarily silty with at least a moderate amount of organic content. Over most of the lake there appears to be relatively little variation in SOD 14the interquartile range in values was 0.4 g/m2/day in the spring and 0.7 g/m2/day in the late summer. A significant exception was apparent in Ball Bay, where SOD in the late summer was greater than 10.2 g/m2/day. In the absence of primary production, an SOD of this magnitude could deplete the water column of oxygen in a few days. This measurement provided evidence that localized areas of very high SOD occur episodically in the bays, perhaps associated with large algal mats being trapped by the lake circulation patterns. A statistical test for a spring to late summer difference in the median values of SOD confirmed that SOD in the late summer (median value 1.7 g/m2/day) was significantly higher than in the spring (median value 1.2 g/m2/day). The difference was primarily due to seasonal changes in temperature; when SOD values were corrected to 20°C, there was no seasonal difference in the median values. There was no correlation between SOD20 and the sediment characteristics measured in this study: percent fines, organic carbon, and residue lost on ignition. Title: Sediment oxygen demand in Upper Klamath and Agency Lakes, Oregon, 1999 Author: Wood, Tamara M. Year: 2001, 2005, 2004 SIGNIFICANT FINDINGS The distribution of SOD2q values (measured sediment oxygen demand values corrected to 20°C [degrees Celsius]) had a median value of 1.6 g/m2/day (grams per square meter per day) in the spring and 1.7 g/m2/day in the late summer. These values were well within the range of values in the literature for sites with similar sediment characteristics: primarily silty with at least a moderate amount of organic content. Over most of the lake there appears to be relatively little variation in SOD 14the interquartile range in values was 0.4 g/m2/day in the spring and 0.7 g/m2/day in the late summer. A significant exception was apparent in Ball Bay, where SOD in the late summer was greater than 10.2 g/m2/day. In the absence of primary production, an SOD of this magnitude could deplete the water column of oxygen in a few days. This measurement provided evidence that localized areas of very high SOD occur episodically in the bays, perhaps associated with large algal mats being trapped by the lake circulation patterns. A statistical test for a spring to late summer difference in the median values of SOD confirmed that SOD in the late summer (median value 1.7 g/m2/day) was significantly higher than in the spring (median value 1.2 g/m2/day). The difference was primarily due to seasonal changes in temperature; when SOD values were corrected to 20°C, there was no seasonal difference in the median values. There was no correlation between SOD20 and the sediment characteristics measured in this study: percent fines, organic carbon, and residue lost on ignition. Close

• 49. [Image] Irrigation in Klamath County : cooperative irrigation investigation with the Office of Experiment Stations, United States Department of Agriculture

  	CONTENTS. Page Introduction 2620 5 Climatic conditions 2620 6 Units of measurement 2620 7 Losses by seepage and evaporation 2620 7 Duty of water 26208-10 Evaporation 2620 12 Soil and water analyses ...
  	Citation × Citation Citation Abstract Copy Title: Irrigation in Klamath County : cooperative irrigation investigation with the Office of Experiment Stations, United States Department of Agriculture Author: Kent, F.L. (Fred LeRoy) Year: 1905, 2005 CONTENTS. Page Introduction 2620 5 Climatic conditions 2620 6 Units of measurement 2620 7 Losses by seepage and evaporation 2620 7 Duty of water 26208-10 Evaporation 2620 12 Soil and water analyses 262014-15 Data relative to alfalfa growing 2620 15 Summary 2620 16 ILLUSTRATIONS. I. Wing dam at intake of Ankeny canal 269 4 II. Checked field of M. E. Robinson 2620 10 III. Headgate, Ankeny canal 2620 11 Title: Irrigation in Klamath County : cooperative irrigation investigation with the Office of Experiment Stations, United States Department of Agriculture Author: Kent, F.L. (Fred LeRoy) Year: 1905, 2005 CONTENTS. Page Introduction 2620 5 Climatic conditions 2620 6 Units of measurement 2620 7 Losses by seepage and evaporation 2620 7 Duty of water 26208-10 Evaporation 2620 12 Soil and water analyses 262014-15 Data relative to alfalfa growing 2620 15 Summary 2620 16 ILLUSTRATIONS. I. Wing dam at intake of Ankeny canal 269 4 II. Checked field of M. E. Robinson 2620 10 III. Headgate, Ankeny canal 2620 11 Close

• 50. [Image] Klamath River fish die-off, September 2002 : causative factors of mortality

  	Executive Summary This report provides information describing the biological, hydrological, meteorological, and water quality conditions associated with the die-off of an estimated 34,056 fish in the Klamath ...
  	Citation × Citation Citation Abstract Copy Title: Klamath River fish die-off, September 2002 : causative factors of mortality Author: Guillen, George Year: 2003, 2005, 2004 Executive Summary This report provides information describing the biological, hydrological, meteorological, and water quality conditions associated with the die-off of an estimated 34,056 fish in the Klamath River, California in September 2002. The proximate cause of death was heavy infections of two fish pathogens, Ich and columnaris. However, given that these ubiquitous pathogens are normally found in the Klamath River, additional factors must have played a role for them to have become lethal. It is our conclusion based on multiple lines of evidence that the fish die-off in the lower Klamath River in 2002 was a result of a combination of factors that began with an early peak in the return of a large run of fall Chinook salmon. Low river discharges apparently did not provide suitable attraction flows for migrating adult salmon, resulting in large numbers of fish congregating in the warm waters of the lower River. The high density offish, low discharges, warm water temperatures, and possible extended residence time of salmon created optimal conditions for parasite proliferation and precipitated an epizootic of Ich and columnaris. Based on a review of available literature and historical records, this was the largest known pre-spawning adult salmonid die-off recorded for the Klamath River and possibly the Pacific coast. Title: Klamath River fish die-off, September 2002 : causative factors of mortality Author: Guillen, George Year: 2003, 2005, 2004 Executive Summary This report provides information describing the biological, hydrological, meteorological, and water quality conditions associated with the die-off of an estimated 34,056 fish in the Klamath River, California in September 2002. The proximate cause of death was heavy infections of two fish pathogens, Ich and columnaris. However, given that these ubiquitous pathogens are normally found in the Klamath River, additional factors must have played a role for them to have become lethal. It is our conclusion based on multiple lines of evidence that the fish die-off in the lower Klamath River in 2002 was a result of a combination of factors that began with an early peak in the return of a large run of fall Chinook salmon. Low river discharges apparently did not provide suitable attraction flows for migrating adult salmon, resulting in large numbers of fish congregating in the warm waters of the lower River. The high density offish, low discharges, warm water temperatures, and possible extended residence time of salmon created optimal conditions for parasite proliferation and precipitated an epizootic of Ich and columnaris. Based on a review of available literature and historical records, this was the largest known pre-spawning adult salmonid die-off recorded for the Klamath River and possibly the Pacific coast. Close