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• 1. [Article] Scenic photo from Olalla Creek-Lookingglass Creek Watershed

  Photo was taken on the Olalla Creek-Lookingglass Creek Watershed

  Citation × Citation Citation Abstract Copy Title: Scenic photo from Olalla Creek-Lookingglass Creek Watershed Author: Partnership for the Umpqua Rivers Photo was taken on the Olalla Creek-Lookingglass Creek Watershed Title: Scenic photo from Olalla Creek-Lookingglass Creek Watershed Author: Partnership for the Umpqua Rivers Photo was taken on the Olalla Creek-Lookingglass Creek Watershed Close

• 2. [Article] Olalla / Lookingglass Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information ...

  Citation × Citation Citation Abstract Copy Title: Olalla / Lookingglass Watershed assessment and action plan Author: DeVore, Matt B., Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in Sections 1.2 and 1.3 were compiled from the following documents: The Oregon Watershed Assessment Manual, the Olalla / Lookingglass Watershed Analysis, and the Middle South Umpqua Watershed Analysis. Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: Olalla / Lookingglass Watershed assessment and action plan Author: DeVore, Matt B., Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in Sections 1.2 and 1.3 were compiled from the following documents: The Oregon Watershed Assessment Manual, the Olalla / Lookingglass Watershed Analysis, and the Middle South Umpqua Watershed Analysis. Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 3. [Article] Myrtle Creek Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information ...

  Citation × Citation Citation Abstract Copy Title: Myrtle Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 were compiled from the following documents: the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Draft Myrtle Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Middle South Umpqua Watershed Analysis (USDI Bureau of Land Management, 1999). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: Myrtle Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 were compiled from the following documents: the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Draft Myrtle Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Middle South Umpqua Watershed Analysis (USDI Bureau of Land Management, 1999). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 4. [Article] West Fork Cow Creek Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership, and current land uses. Information in section 1.2 was compiled from the Oregon ...

  Citation × Citation Citation Abstract Copy Title: West Fork Cow Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership, and current land uses. Information in section 1.2 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower Cow Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: West Fork Cow Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership, and current land uses. Information in section 1.2 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower Cow Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 5. [Article] Lower Cow Creek Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information ...

  Citation × Citation Citation Abstract Copy Title: Lower Cow Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower Cow Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: Lower Cow Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower Cow Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 6. [Article] Jordan/Alder Watershed Assessment

  The Jordan/Alder Watershed is a 2,459-acre watershed located in southwest Oregon immediately west of Canyonville in Douglas County. This watershed--a portion of the O'Shea Creek HUC6, or sixth-field watershed--lies ...

  Citation × Citation Citation Abstract Copy Title: Jordan/Alder Watershed Assessment Author: Barnes and Associates Inc. The Jordan/Alder Watershed is a 2,459-acre watershed located in southwest Oregon immediately west of Canyonville in Douglas County. This watershed--a portion of the O'Shea Creek HUC6, or sixth-field watershed--lies within the bounds of the South Umpqua River HUC5, or fifth-field watershed. Jordan Creek is a tributary to the South Umpqua River immediately downstream of the City of Canyonville, while Alder Creek is a tributary of Jordan Creek. The South Umpqua River bounds the watershed on the north. Title: Jordan/Alder Watershed Assessment Author: Barnes and Associates Inc. The Jordan/Alder Watershed is a 2,459-acre watershed located in southwest Oregon immediately west of Canyonville in Douglas County. This watershed--a portion of the O'Shea Creek HUC6, or sixth-field watershed--lies within the bounds of the South Umpqua River HUC5, or fifth-field watershed. Jordan Creek is a tributary to the South Umpqua River immediately downstream of the City of Canyonville, while Alder Creek is a tributary of Jordan Creek. The South Umpqua River bounds the watershed on the north. Close

• 7. [Article] Calapooya Creek Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information ...

  Citation × Citation Citation Abstract Copy Title: Calapooya Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Calapooya Creek Watershed Analysis (USDI Bureau of Land Management, 1999), and the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: Calapooya Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Calapooya Creek Watershed Analysis (USDI Bureau of Land Management, 1999), and the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 8. [Article] Upper Cow Creek Watershed assessment and action plan

  The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information ...

  Citation × Citation Citation Abstract Copy Title: Upper Cow Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower Cow Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Middle South Umpqua Watershed Analysis (USDI Bureau of Land Management, 1999). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Title: Upper Cow Creek Watershed assessment and action plan Author: Geyer, Nancy A. The introduction provides a general description of the watershed in terms of its natural and human-made features, ownership and current land uses, and the communities within the watershed. Information in sections 1.2 and 1.3 was compiled from the Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower Cow Creek Watershed Analysis (USDI Bureau of Land Management, 2002), and the Middle South Umpqua Watershed Analysis (USDI Bureau of Land Management, 1999). Additional information is from the following sources’ databases: The Oregon Climate Service, the US Census Bureau, and the Douglas County Assessor. Close

• 9. [Article] Forest Soils and Topography : Decoding the Influence of Physical Site Characteristics on Soil Water and Forest Productivity in Oregon's Coast Ranges

  Citation × Citation Citation Abstract Copy Title: Forest Soils and Topography : Decoding the Influence of Physical Site Characteristics on Soil Water and Forest Productivity in Oregon's Coast Ranges Author: Rodman, Henry Title: Forest Soils and Topography : Decoding the Influence of Physical Site Characteristics on Soil Water and Forest Productivity in Oregon's Coast Ranges Author: Rodman, Henry Close

• 10. [Article] Ecological land units of Bear Creek watershed and their relationship to water quality

  The work upon which this report is based was supported by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research ...

  Citation × Citation Citation Abstract Copy Title: Ecological land units of Bear Creek watershed and their relationship to water quality Author: Mattison, Jeffrey L. The work upon which this report is based was supported by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964. Title: Ecological land units of Bear Creek watershed and their relationship to water quality Author: Mattison, Jeffrey L. The work upon which this report is based was supported by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964. Close

• 11. [Article] Middle Cow Creek Watershed assessment and action plan

  The Middle Cow Creek Watershed Assessment process has been contributed to by a group of local landowners. The group met fifteen times to review data about their watershed going into the document and portions ...

  Citation × Citation Citation Abstract Copy Title: Middle Cow Creek Watershed assessment and action plan Author: Kincaid, Heidi The Middle Cow Creek Watershed Assessment process has been contributed to by a group of local landowners. The group met fifteen times to review data about their watershed going into the document and portions of the watershed assessment. Members of the Middle Cow Creek landowner group represented private landowners, private industrial timber companies, rural residents, the City of Glendale, the Bureau of Land Management Medford District (BLM), the Oregon Department of Forestry, the UBWC, and the Oregon Department of Environmental Quality (DEQ). Title: Middle Cow Creek Watershed assessment and action plan Author: Kincaid, Heidi The Middle Cow Creek Watershed Assessment process has been contributed to by a group of local landowners. The group met fifteen times to review data about their watershed going into the document and portions of the watershed assessment. Members of the Middle Cow Creek landowner group represented private landowners, private industrial timber companies, rural residents, the City of Glendale, the Bureau of Land Management Medford District (BLM), the Oregon Department of Forestry, the UBWC, and the Oregon Department of Environmental Quality (DEQ). Close

• 12. [Article] Watershed response to western juniper control

  Western juniper (Juniperus occidentalis) encroachment has been associated with increased soil loss and reduced infiltration resulting in the loss of native herbaceous plant communities and the bird and ...

  Citation × Citation Citation Abstract Copy Title: Watershed response to western juniper control Author: Deboodt, Timothy L. Western juniper (Juniperus occidentalis) encroachment has been associated with increased soil loss and reduced infiltration resulting in the loss of native herbaceous plant communities and the bird and animal species that rely on them. Hydrologically, however, change in water yield has been linked with the amount of annual precipitation a site received. Studies published in the 1970’s and 1980’s, suggest that a minimum 4500 mm (18 inches) of annual precipitation was necessary before an increase in water yield manifested itself following vegetation manipulation. In 1993, a paired watershed study was initiated in the Camp Creek drainage, a tributary of the Crooked River of central Oregon, to evaluate the impacts of cutting western juniper on the hydrologic function of those sites. The study involved a paired watershed approach using watersheds of approximately 110 hectares (270 acres) each to evaluate changes in a system’s water budget following the reduction of western juniper. The 30 year average annual precipitation for the area is 3500 mm (13.75) and during the study period, annual precipitation ranged from 80 percent to 129 percent of average. In 2005, following 12 years of pretreatment monitoring in the 2 watersheds (Mays and Jensen) all post-European aged juniper (juniper < 140 years of age) were cut from the treatment watershed (Mays). Analysis indicated that juniper reduction significantly increased late season spring flow by 225 percent (alpha > .05), increased days of recorded ground water by an average of 41 days (alpha > .05) and increased the relative availability of late season soil moisture at soil depths of .76 m (27 inches) (alpha > 0.1). Ephemeral channel flow did not show a predictable trend during 2 years of post treatment measurements. Channel flow is dependent on spring snow melt and severe summer thunderstorm activity. When winter soils were greater than 0 degrees Celsius (32 degrees F), the source of channel flow in Mays was observed to be seepage from the channel banks. Channel flow in Jensen appeared to be a result of rock forcing subsurface flows to the surface. Vegetative responses showed significant increases in perennial forb canopy cover (alpha > .01) and annual forb and annual grass basal cover (alpha > .05). Increases were also found in reduction of percent bare ground and increase in shrub cover, but were not significant. A statistically insignificant decrease in perennial grass cover was noted in the treated watershed however a large amount of reproductive culms were noted in the treated watershed in 2007 compared to the control watershed. Hillslope erosion and channel morphology showed no predictable trend following treatment. Inherent differences in channel morphology between the two watershed prior to treatment existed. This difference may be a product of the two channels being at different evolutionary or successional stages relative to each other and thus indicating that channel recovery would be different for each watershed. The Camp Creek project illustrated that for this system, managing vegetation for water yield may be obtainable at a much lower precipitation threshold than what was previously reported in the literature. Title: Watershed response to western juniper control Author: Deboodt, Timothy L. Western juniper (Juniperus occidentalis) encroachment has been associated with increased soil loss and reduced infiltration resulting in the loss of native herbaceous plant communities and the bird and animal species that rely on them. Hydrologically, however, change in water yield has been linked with the amount of annual precipitation a site received. Studies published in the 1970’s and 1980’s, suggest that a minimum 4500 mm (18 inches) of annual precipitation was necessary before an increase in water yield manifested itself following vegetation manipulation. In 1993, a paired watershed study was initiated in the Camp Creek drainage, a tributary of the Crooked River of central Oregon, to evaluate the impacts of cutting western juniper on the hydrologic function of those sites. The study involved a paired watershed approach using watersheds of approximately 110 hectares (270 acres) each to evaluate changes in a system’s water budget following the reduction of western juniper. The 30 year average annual precipitation for the area is 3500 mm (13.75) and during the study period, annual precipitation ranged from 80 percent to 129 percent of average. In 2005, following 12 years of pretreatment monitoring in the 2 watersheds (Mays and Jensen) all post-European aged juniper (juniper < 140 years of age) were cut from the treatment watershed (Mays). Analysis indicated that juniper reduction significantly increased late season spring flow by 225 percent (alpha > .05), increased days of recorded ground water by an average of 41 days (alpha > .05) and increased the relative availability of late season soil moisture at soil depths of .76 m (27 inches) (alpha > 0.1). Ephemeral channel flow did not show a predictable trend during 2 years of post treatment measurements. Channel flow is dependent on spring snow melt and severe summer thunderstorm activity. When winter soils were greater than 0 degrees Celsius (32 degrees F), the source of channel flow in Mays was observed to be seepage from the channel banks. Channel flow in Jensen appeared to be a result of rock forcing subsurface flows to the surface. Vegetative responses showed significant increases in perennial forb canopy cover (alpha > .01) and annual forb and annual grass basal cover (alpha > .05). Increases were also found in reduction of percent bare ground and increase in shrub cover, but were not significant. A statistically insignificant decrease in perennial grass cover was noted in the treated watershed however a large amount of reproductive culms were noted in the treated watershed in 2007 compared to the control watershed. Hillslope erosion and channel morphology showed no predictable trend following treatment. Inherent differences in channel morphology between the two watershed prior to treatment existed. This difference may be a product of the two channels being at different evolutionary or successional stages relative to each other and thus indicating that channel recovery would be different for each watershed. The Camp Creek project illustrated that for this system, managing vegetation for water yield may be obtainable at a much lower precipitation threshold than what was previously reported in the literature. Close

• 13. [Article] Deer Creek Watershed assessment and action plan

  The Deer Creek Watershed Assessment process has been followed by a group of local landowners. The organization of this document was constructed as a combination of the informational needs of the Deer Creek ...

  Citation × Citation Citation Abstract Copy Title: Deer Creek Watershed assessment and action plan Author: Kincaid, Heidi The Deer Creek Watershed Assessment process has been followed by a group of local landowners. The organization of this document was constructed as a combination of the informational needs of the Deer Creek landowners and the framework of the Oregon Watershed Assessment Manual. The group has met twelve times to review the data going into the document, followed by three meetings to review the assessment and develop the action plan. Members of the Deer Creek landowner group represented sheep ranches, cattle ranches, industry within Deer Creek, the City of Roseburg, private industrial timber companies, city residents, rural residents, the UBWC, the Bureau of Land Management (BLM), the Department of Environmental Quality (DEQ), the Douglas Soil and Water Conservation District (DSWCD), and the Douglas Small Woodlands Association. Title: Deer Creek Watershed assessment and action plan Author: Kincaid, Heidi The Deer Creek Watershed Assessment process has been followed by a group of local landowners. The organization of this document was constructed as a combination of the informational needs of the Deer Creek landowners and the framework of the Oregon Watershed Assessment Manual. The group has met twelve times to review the data going into the document, followed by three meetings to review the assessment and develop the action plan. Members of the Deer Creek landowner group represented sheep ranches, cattle ranches, industry within Deer Creek, the City of Roseburg, private industrial timber companies, city residents, rural residents, the UBWC, the Bureau of Land Management (BLM), the Department of Environmental Quality (DEQ), the Douglas Soil and Water Conservation District (DSWCD), and the Douglas Small Woodlands Association. Close

• 14. [Article] Landscape photo from the Deer Creek area of the Lower South Umpqua watershed

  Photo was taken in the Deer Creek area of the Lower South Umpqua Watershed

  Citation × Citation Citation Abstract Copy Title: Landscape photo from the Deer Creek area of the Lower South Umpqua watershed Author: Partnership for the Umpqua Rivers Photo was taken in the Deer Creek area of the Lower South Umpqua Watershed Title: Landscape photo from the Deer Creek area of the Lower South Umpqua watershed Author: Partnership for the Umpqua Rivers Photo was taken in the Deer Creek area of the Lower South Umpqua Watershed Close

• 15. [Article] Landscape photo from the Upper Cow Creek Watershed

  Photo was taken in the Upper Cow Creek Watershed

  Citation × Citation Citation Abstract Copy Title: Landscape photo from the Upper Cow Creek Watershed Author: Partnership for the Umpqua Rivers Photo was taken in the Upper Cow Creek Watershed Title: Landscape photo from the Upper Cow Creek Watershed Author: Partnership for the Umpqua Rivers Photo was taken in the Upper Cow Creek Watershed Close

• 16. [Article] Evaluation of proposed dwarf mistletoe and western spruce budworm management projects, Cramer Creek, Garnet Resource Area, Bureau of Land Management

  Citation × Citation Citation Abstract Copy Title: Evaluation of proposed dwarf mistletoe and western spruce budworm management projects, Cramer Creek, Garnet Resource Area, Bureau of Land Management Author: Dooling, Oscar J., United States. Forest Service. Northern Region. State & Private Forestry Title: Evaluation of proposed dwarf mistletoe and western spruce budworm management projects, Cramer Creek, Garnet Resource Area, Bureau of Land Management Author: Dooling, Oscar J., United States. Forest Service. Northern Region. State & Private Forestry Close

• 17. [Article] Relations between geology and mass movement features in a part of the East Fork Coquille River watershed, southern Coast Range, Oregon

  Various types of mass movement features are found in the drainage basin of the East Fork Coquille River in the southern Oregon Coast Range. The distribution and forms of mass movement features in the area are ...

  Citation × Citation Citation Abstract Copy Title: Relations between geology and mass movement features in a part of the East Fork Coquille River watershed, southern Coast Range, Oregon Author: Lane, Jeffrey W. Various types of mass movement features are found in the drainage basin of the East Fork Coquille River in the southern Oregon Coast Range. The distribution and forms of mass movement features in the area are related to geologic factors and the resultant topography. The Jurassic Otter Point Formation, a melange of low-grade metamorphic and marine sedimentary rocks, is present in scattered outcrops in the southwest portion of the study area but is not extensive. The Tertiary Roseburg Formation consists primarily of bedded siltstone and is compressed into a series of west to northwest-striking folds. The overlying Lookingglass, Flournoy, and Tyee Formations consist of rhythmically bedded sandstone and siltstone units with an east to northeasterly dip of 5-15°decreasing upward in the stratigraphic section. The units form cuesta ridges with up to 2000 feet of relief. Signature redacted for privacy. The distribution of mass movements is demonstrably related to the bedrock geology and the study area topography. Debris avalanches are more common on the steep slopes underlain by Flournoy Formation and Tyee Formation sandstones, on the obsequent slope of cuesta ridges, and on north-facing slopes. Soil creep occurs throughout the study area and may be the primary mass movement form in siltstone terrane, though soil creep was not studied in detail. Slump-earthflows, rockfalls, and rock slumps also occur in the study area though less extensively than debris avalanches. Stratigraphy and bedrock attitude contributed to the pre-historic occurrence of a major landslide involving Flournoy and Tyee Formation bedrock. The Sitkum landslide dammed the East Fork Coquille River, forming a substantial lake which is now filled with sediments. The form and size of the Sitkum landslide is similar to other landslides which have dammed drainages in the Coast Range, including Loon Lake, Triangle Lake, and Drift Creek. Comparisons with the Loon Lake landslide, which has a known radiocarbon date, provide estimated dates of 3125 years B.P. for the Sitkum landslide and 10,300 years for the Triangle Lake landslide. Title: Relations between geology and mass movement features in a part of the East Fork Coquille River watershed, southern Coast Range, Oregon Author: Lane, Jeffrey W. Various types of mass movement features are found in the drainage basin of the East Fork Coquille River in the southern Oregon Coast Range. The distribution and forms of mass movement features in the area are related to geologic factors and the resultant topography. The Jurassic Otter Point Formation, a melange of low-grade metamorphic and marine sedimentary rocks, is present in scattered outcrops in the southwest portion of the study area but is not extensive. The Tertiary Roseburg Formation consists primarily of bedded siltstone and is compressed into a series of west to northwest-striking folds. The overlying Lookingglass, Flournoy, and Tyee Formations consist of rhythmically bedded sandstone and siltstone units with an east to northeasterly dip of 5-15°decreasing upward in the stratigraphic section. The units form cuesta ridges with up to 2000 feet of relief. Signature redacted for privacy. The distribution of mass movements is demonstrably related to the bedrock geology and the study area topography. Debris avalanches are more common on the steep slopes underlain by Flournoy Formation and Tyee Formation sandstones, on the obsequent slope of cuesta ridges, and on north-facing slopes. Soil creep occurs throughout the study area and may be the primary mass movement form in siltstone terrane, though soil creep was not studied in detail. Slump-earthflows, rockfalls, and rock slumps also occur in the study area though less extensively than debris avalanches. Stratigraphy and bedrock attitude contributed to the pre-historic occurrence of a major landslide involving Flournoy and Tyee Formation bedrock. The Sitkum landslide dammed the East Fork Coquille River, forming a substantial lake which is now filled with sediments. The form and size of the Sitkum landslide is similar to other landslides which have dammed drainages in the Coast Range, including Loon Lake, Triangle Lake, and Drift Creek. Comparisons with the Loon Lake landslide, which has a known radiocarbon date, provide estimated dates of 3125 years B.P. for the Sitkum landslide and 10,300 years for the Triangle Lake landslide. Close

• 18. [Article] Economic and environmental implications of alternative landscape designs in the Walnut Creek Watershed of Iowa

  Citation × Citation Citation Abstract Copy Title: Economic and environmental implications of alternative landscape designs in the Walnut Creek Watershed of Iowa Author: Coiner, Colette Title: Economic and environmental implications of alternative landscape designs in the Walnut Creek Watershed of Iowa Author: Coiner, Colette Close

• 19. [Article] Municipal Water Impacts on Steelhead Trout in the Gales Creek Watershed

  Graduation date: 2016

  Citation × Citation Citation Abstract Copy Title: Municipal Water Impacts on Steelhead Trout in the Gales Creek Watershed Author: Smith, Haley B. Graduation date: 2016 Title: Municipal Water Impacts on Steelhead Trout in the Gales Creek Watershed Author: Smith, Haley B. Graduation date: 2016 Close

• 20. [Article] Pine Creek Ranch watershed restoration plan

  Published January 2002. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catal...

  Citation × Citation Citation Abstract Copy Title: Pine Creek Ranch watershed restoration plan Author: Oregon State University. Agricultural Experiment Station, Hoffert-Hay, Denise Published January 2002. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Pine Creek Ranch watershed restoration plan Author: Oregon State University. Agricultural Experiment Station, Hoffert-Hay, Denise Published January 2002. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close