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• 1. [Article] Lower South Umpqua 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 South Umpqua 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 Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), 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: Lower South Umpqua 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 Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), 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

• 2. [Article] Middle South Umpqua 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: Middle South Umpqua 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 following sources: The Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), 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: Middle South Umpqua 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 following sources: The Oregon Watershed Assessment Manual (Watershed Professionals Network, 1999), the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), 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

• 3. [Article] Restoration project photo from the Lower North Umpqua Watershed

  Photo was taken in the Lower North Umpqua Watershed

  Citation × Citation Citation Abstract Copy Title: Restoration project photo from the Lower North Umpqua Watershed Author: Partnership for the Umpqua Rivers Photo was taken in the Lower North Umpqua Watershed Title: Restoration project photo from the Lower North Umpqua Watershed Author: Partnership for the Umpqua Rivers Photo was taken in the Lower North Umpqua Watershed Close

• 4. [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

• 5. [Article] Lower North Umpqua 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 North Umpqua 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), the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), 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: Lower North Umpqua 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), the Lower South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), 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

• 6. [Article] South Umpqua Watershed temperature study 1999 : procedure, results and preliminary analysis

  Citation × Citation Citation Abstract Copy Title: South Umpqua Watershed temperature study 1999 : procedure, results and preliminary analysis Author: Umpqua Basin Watershed Council Title: South Umpqua Watershed temperature study 1999 : procedure, results and preliminary analysis Author: Umpqua Basin Watershed Council Close

• 7. [Article] South Umpqua River 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: South Umpqua River 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 South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), the Myrtle Creek Watershed Analysis (Draft) (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: South Umpqua River 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 South Umpqua Watershed Analysis (USDI Bureau of Land Management, 2000), the Myrtle Creek Watershed Analysis (Draft) (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

• 8. [Article] BLM addendum for Lower North Umpqua Watershed assessment : fifth field watershed

  Within the Lower North Umpqua watershed, BLM has acquired approximately 6,600 acres of land specifically to manage habitat to enhance the Columbian White-tailed Deer (CWTD). This area is called the North ...

  Citation × Citation Citation Abstract Copy Title: BLM addendum for Lower North Umpqua Watershed assessment : fifth field watershed Author: U.S. Department of Interior Bureau of Land Management Within the Lower North Umpqua watershed, BLM has acquired approximately 6,600 acres of land specifically to manage habitat to enhance the Columbian White-tailed Deer (CWTD). This area is called the North Bank Habitat Management Area (NBHMA) and will be managed as described in the NBHMA Environmental Impact Statement. The BLM also manages an additional 5,780 acres for multiple use objectives. These lands are mostly scattered in the headwater region in the north and northwest of the watershed. Within the next five to ten years, it is likely that the Swiftwater Field Manager will need to be involved in some aspect of decision-making on those 5,780 acres with the following general areas. These areas have been used to help guide the key questions, the information to answer those questions, and the resulting management opportunities. A major assumption in the development of these key questions is that the Roseburg District Resource Management Plan (RMP) has given some prescriptive measures through the landscape land use allocations. Because the RMP sets standards and guidelines on each land use allocation and the kinds of activities that can occur in those land uses, this watershed assessment seeks to provide information to guide decision making within those overarching planning parameters. Title: BLM addendum for Lower North Umpqua Watershed assessment : fifth field watershed Author: U.S. Department of Interior Bureau of Land Management Within the Lower North Umpqua watershed, BLM has acquired approximately 6,600 acres of land specifically to manage habitat to enhance the Columbian White-tailed Deer (CWTD). This area is called the North Bank Habitat Management Area (NBHMA) and will be managed as described in the NBHMA Environmental Impact Statement. The BLM also manages an additional 5,780 acres for multiple use objectives. These lands are mostly scattered in the headwater region in the north and northwest of the watershed. Within the next five to ten years, it is likely that the Swiftwater Field Manager will need to be involved in some aspect of decision-making on those 5,780 acres with the following general areas. These areas have been used to help guide the key questions, the information to answer those questions, and the resulting management opportunities. A major assumption in the development of these key questions is that the Roseburg District Resource Management Plan (RMP) has given some prescriptive measures through the landscape land use allocations. Because the RMP sets standards and guidelines on each land use allocation and the kinds of activities that can occur in those land uses, this watershed assessment seeks to provide information to guide decision making within those overarching planning parameters. Close

• 9. [Article] Scenic photo of Myrtle Creek in the South Umpqua Watershed

  Myrtle Creek photo

  Citation × Citation Citation Abstract Copy Title: Scenic photo of Myrtle Creek in the South Umpqua Watershed Author: Partnership for the Umpqua Rivers Myrtle Creek photo Title: Scenic photo of Myrtle Creek in the South Umpqua Watershed Author: Partnership for the Umpqua Rivers Myrtle Creek photo Close

• 10. [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

• 11. [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

• 12. [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

• 13. [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

• 14. [Article] An assessment of community-based adaptive watershed management in three Umpqua Basin Watersheds

  The dissertation introduces community-based adaptive watershed management (CAWM) as a holistic conservation framework. The CAWM framework integrates social and ecological suitability to achieve conservation ...

  Citation × Citation Citation Abstract Copy Title: An assessment of community-based adaptive watershed management in three Umpqua Basin Watersheds Author: Habron, Geoffrey Bryan The dissertation introduces community-based adaptive watershed management (CAWM) as a holistic conservation framework. The CAWM framework integrates social and ecological suitability to achieve conservation outcomes. The core theoretical concepts consist of adaptive management, adoption-diffusion, symbolic interactionism, community-based conservation, spatial analysis and watershed management. The CAWM framework is applied to the Calapooya Creek, Deer Creek and Myrtle Creek watersheds within the Umpqua River Basin in Southwestern Oregon. The goal of the research is to facilitate effective watershed restoration outcomes grounded in a solid understanding of social and ecological dynamics. Applying the CAWM framework provides the basis to determine the kinds of conservation practices to implement, the locations in which to implement them and the kinds of programs to stimulate their adoption. Therefore, the dissertation objectives are to: 1) identify agricultural landowner participation in watershed conservation projects; 2) assess the spatial distribution of watershed projects; 3) determine the characteristics of participating and non-participating landowners; and 4) determine the sociocultural, ecological and geographic constraints to adaptive watershed management. Data were collected during 1997-1998 using agricultural landowner interviews, a mail landowner survey and observations of the Umpqua Basin Watershed Council. Landowners' worldviews consist of independence, the importance of private property rights, aversion toward government interference and a belief in environmental resilience. Landowners implement upland conservation practices such as off-stream livestock water developments and rotational grazing more often than riparian fencing, riparian tree planting and installing fish screens on instream irrigation diversions. The key factors in adoption of conservation practices include the use of irrigation, shared management decisions with a spouse, a belief in scientific experimentation and discussion of conservation with others. Spatial analysis using geographic information systems indicate that a suite of conservation practices is needed to achieve a network of large, connected patches throughout the watersheds. Title: An assessment of community-based adaptive watershed management in three Umpqua Basin Watersheds Author: Habron, Geoffrey Bryan The dissertation introduces community-based adaptive watershed management (CAWM) as a holistic conservation framework. The CAWM framework integrates social and ecological suitability to achieve conservation outcomes. The core theoretical concepts consist of adaptive management, adoption-diffusion, symbolic interactionism, community-based conservation, spatial analysis and watershed management. The CAWM framework is applied to the Calapooya Creek, Deer Creek and Myrtle Creek watersheds within the Umpqua River Basin in Southwestern Oregon. The goal of the research is to facilitate effective watershed restoration outcomes grounded in a solid understanding of social and ecological dynamics. Applying the CAWM framework provides the basis to determine the kinds of conservation practices to implement, the locations in which to implement them and the kinds of programs to stimulate their adoption. Therefore, the dissertation objectives are to: 1) identify agricultural landowner participation in watershed conservation projects; 2) assess the spatial distribution of watershed projects; 3) determine the characteristics of participating and non-participating landowners; and 4) determine the sociocultural, ecological and geographic constraints to adaptive watershed management. Data were collected during 1997-1998 using agricultural landowner interviews, a mail landowner survey and observations of the Umpqua Basin Watershed Council. Landowners' worldviews consist of independence, the importance of private property rights, aversion toward government interference and a belief in environmental resilience. Landowners implement upland conservation practices such as off-stream livestock water developments and rotational grazing more often than riparian fencing, riparian tree planting and installing fish screens on instream irrigation diversions. The key factors in adoption of conservation practices include the use of irrigation, shared management decisions with a spouse, a belief in scientific experimentation and discussion of conservation with others. Spatial analysis using geographic information systems indicate that a suite of conservation practices is needed to achieve a network of large, connected patches throughout the watersheds. Close

• 15. [Article] Cow Creek Watershed temperature study 2000 : procedure, results and preliminary analysis

  Citation × Citation Citation Abstract Copy Title: Cow Creek Watershed temperature study 2000 : procedure, results and preliminary analysis Author: Umpqua Basin Watershed Council Title: Cow Creek Watershed temperature study 2000 : procedure, results and preliminary analysis Author: Umpqua Basin Watershed Council Close

• 16. [Article] Some water problems and hydrologic characteristics of the Umpqua Basin

  Citation × Citation Citation Abstract Copy Title: Some water problems and hydrologic characteristics of the Umpqua Basin Author: Herring, H. G., Pacific Northwest Forest and Range Experiment Station (Portland, Or.), Hayes, G. L. Title: Some water problems and hydrologic characteristics of the Umpqua Basin Author: Herring, H. G., Pacific Northwest Forest and Range Experiment Station (Portland, Or.), Hayes, G. L. Close

• 17. [Article] Effects of wildfire on growth and demographics of coastal cutthroat trout in headwater streams

  Wildfire is a largely terrestrial perturbation broadly recognized as an agent of disturbance and ecological change in forested biomes. Effects of post-fire conditions on biotic components of aquatic systems ...

  Citation × Citation Citation Abstract Copy Title: Effects of wildfire on growth and demographics of coastal cutthroat trout in headwater streams Author: Heck, Michael P. Wildfire is a largely terrestrial perturbation broadly recognized as an agent of disturbance and ecological change in forested biomes. Effects of post-fire conditions on biotic components of aquatic systems have been less well-documented, although hypothetically, the two are strongly connected. In fact, the influence of wildfire may be most profound in headwater streams because of the tight linkage between aquatic and terrestrial ecosystems. We sought to understand the influence of post-fire conditions on fish in headwater streams by observing growth and demographics of coastal cutthroat trout (Oncorhynchus clarkii clarkii) following wildfire. During the summer of 2002, wildfire burned portions of three headwater watersheds in the North Umpqua basin of western Oregon. Burn severities ranged from moderate to severe. A reference stream was selected from a nearby fourth watershed. All fish-bearing portions of the stream network in the four watersheds were surveyed for 3 years following the wildfire, and 1,295 scale samples were collected from coastal cutthroat trout for age and growth analysis. Stream temperatures in the burned watersheds changed significantly following the wildfire (p < 0.016), with increases of up to 23% in the most severely burned watershed. During summer electrofishing surveys in the burned watersheds, both young-of-the-year and fish ≥ age 1 were captured; in the unburned watershed, the vast majority of fish captured were ≥ age 1. Age-frequency analyses revealed that fish in older age classes (age ≥ 3) were more prevalent in the unburned watershed than in the burned watersheds. Relative growth rates and length at last annulus formation of coastal cutthroat trout were positively related to the number of degree days during the growing season, and Pearson correlation coefficients ranged from 0.60 (p < 0.07) to 0.90 (p < 0.01). Growth rates and size of fish were not significantly correlated with relative density of fish (p ≥ 0.14). Contrary to the commonly held assumption that wildfire is detrimental to biota in aquatic systems, these results suggest that in the short term (≤ 3 years), fish in the study streams adjusted to environmental change caused by wildfire. Title: Effects of wildfire on growth and demographics of coastal cutthroat trout in headwater streams Author: Heck, Michael P. Wildfire is a largely terrestrial perturbation broadly recognized as an agent of disturbance and ecological change in forested biomes. Effects of post-fire conditions on biotic components of aquatic systems have been less well-documented, although hypothetically, the two are strongly connected. In fact, the influence of wildfire may be most profound in headwater streams because of the tight linkage between aquatic and terrestrial ecosystems. We sought to understand the influence of post-fire conditions on fish in headwater streams by observing growth and demographics of coastal cutthroat trout (Oncorhynchus clarkii clarkii) following wildfire. During the summer of 2002, wildfire burned portions of three headwater watersheds in the North Umpqua basin of western Oregon. Burn severities ranged from moderate to severe. A reference stream was selected from a nearby fourth watershed. All fish-bearing portions of the stream network in the four watersheds were surveyed for 3 years following the wildfire, and 1,295 scale samples were collected from coastal cutthroat trout for age and growth analysis. Stream temperatures in the burned watersheds changed significantly following the wildfire (p < 0.016), with increases of up to 23% in the most severely burned watershed. During summer electrofishing surveys in the burned watersheds, both young-of-the-year and fish ≥ age 1 were captured; in the unburned watershed, the vast majority of fish captured were ≥ age 1. Age-frequency analyses revealed that fish in older age classes (age ≥ 3) were more prevalent in the unburned watershed than in the burned watersheds. Relative growth rates and length at last annulus formation of coastal cutthroat trout were positively related to the number of degree days during the growing season, and Pearson correlation coefficients ranged from 0.60 (p < 0.07) to 0.90 (p < 0.01). Growth rates and size of fish were not significantly correlated with relative density of fish (p ≥ 0.14). Contrary to the commonly held assumption that wildfire is detrimental to biota in aquatic systems, these results suggest that in the short term (≤ 3 years), fish in the study streams adjusted to environmental change caused by wildfire. Close

• 18. [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

• 19. [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

• 20. [Article] Tiller Region assessment and action plan

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

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

• 21. [Article] Umpqua river basin

  The purpose of this 1958 report is to implement the water resources policy of the State of Oregon, as prescribed in ORS 536.300.

  Citation × Citation Citation Abstract Copy Title: Umpqua river basin Author: Oregon. State Water Resources Board The purpose of this 1958 report is to implement the water resources policy of the State of Oregon, as prescribed in ORS 536.300. Title: Umpqua river basin Author: Oregon. State Water Resources Board The purpose of this 1958 report is to implement the water resources policy of the State of Oregon, as prescribed in ORS 536.300. Close

• 22. [Article] Umpqua drainage basin steelhead trout spawning area : Map

  File no. 16.1092

  Citation × Citation Citation Abstract Copy Title: Umpqua drainage basin steelhead trout spawning area : Map Author: Oregon. State Water Resources Board File no. 16.1092 Title: Umpqua drainage basin steelhead trout spawning area : Map Author: Oregon. State Water Resources Board File no. 16.1092 Close

• 23. [Article] Umpqua drainage basin silver salmon spawning areas : Map

  File no. 16.1092

  Citation × Citation Citation Abstract Copy Title: Umpqua drainage basin silver salmon spawning areas : Map Author: Oregon. State Water Resources Board File no. 16.1092 Title: Umpqua drainage basin silver salmon spawning areas : Map Author: Oregon. State Water Resources Board File no. 16.1092 Close

• 24. [Article] Breeding site selection by coho salmon (Oncorhynchus kisutch) in relation to large wood additions and factors that drive reproductive success

  The fitness of female Pacific salmon (Oncorhynchus spp.) with respect to breeding behavior can be partitioned into at least four components: survival to reproduction, competition for breeding sites, success ...

  Citation × Citation Citation Abstract Copy Title: Breeding site selection by coho salmon (Oncorhynchus kisutch) in relation to large wood additions and factors that drive reproductive success Author: Clark, Steven (Steven Michael) The fitness of female Pacific salmon (Oncorhynchus spp.) with respect to breeding behavior can be partitioned into at least four components: survival to reproduction, competition for breeding sites, success of egg incubation, and suitability of the local environment near breeding sites for early rearing of juveniles. Accordingly, breeding sites should exhibit predictable habitat features linked to these components. In this study, I evaluated the relative influences of habitat features linked to fitness components on selection of breeding sites by coho salmon (Oncorhynchus kisutch). I also evaluated associations between breeding site selection and additions of large wood, as the latter were introduced into the study system as a means of restoring habitat conditions to benefit coho salmon. I used a model selection approach to organize specific habitat features into groupings reflecting fitness components and influences of large wood. The relative likelihood of each of these models was then evaluated based on how coho salmon were observed to select breeding sites. Specific variables examined within these models included depth at the redd, width to depth ratio, stream network location, proximity to other redds, maximum depth, proximity to a pool tail, and the count of naturally occurring and artificially placed large wood. Results of this work suggest that female coho salmon most likely select breeding sites based on habitat features linked to all four hypothesized fitness components. Linkages between large wood and breeding site selection were less clear, likely due to mismatches between the scale at which availability was quantified relative to the geomorphic influences of wood, insufficient time for wood to have geomorphic influences on habitat, or the directionality in which geomorphic effects are currently manifested (i.e., upstream, downstream, or bi-directional influences). Future work focused on geomorphic processes in this system could reveal stronger linkages between instream wood and the habitat features that coho salmon select for breeding. Title: Breeding site selection by coho salmon (Oncorhynchus kisutch) in relation to large wood additions and factors that drive reproductive success Author: Clark, Steven (Steven Michael) The fitness of female Pacific salmon (Oncorhynchus spp.) with respect to breeding behavior can be partitioned into at least four components: survival to reproduction, competition for breeding sites, success of egg incubation, and suitability of the local environment near breeding sites for early rearing of juveniles. Accordingly, breeding sites should exhibit predictable habitat features linked to these components. In this study, I evaluated the relative influences of habitat features linked to fitness components on selection of breeding sites by coho salmon (Oncorhynchus kisutch). I also evaluated associations between breeding site selection and additions of large wood, as the latter were introduced into the study system as a means of restoring habitat conditions to benefit coho salmon. I used a model selection approach to organize specific habitat features into groupings reflecting fitness components and influences of large wood. The relative likelihood of each of these models was then evaluated based on how coho salmon were observed to select breeding sites. Specific variables examined within these models included depth at the redd, width to depth ratio, stream network location, proximity to other redds, maximum depth, proximity to a pool tail, and the count of naturally occurring and artificially placed large wood. Results of this work suggest that female coho salmon most likely select breeding sites based on habitat features linked to all four hypothesized fitness components. Linkages between large wood and breeding site selection were less clear, likely due to mismatches between the scale at which availability was quantified relative to the geomorphic influences of wood, insufficient time for wood to have geomorphic influences on habitat, or the directionality in which geomorphic effects are currently manifested (i.e., upstream, downstream, or bi-directional influences). Future work focused on geomorphic processes in this system could reveal stronger linkages between instream wood and the habitat features that coho salmon select for breeding. Close

• 25. [Article] North Umpqua River (below Soda Springs Dam) fish management plan

  "The fish management plan for the North Umpqua River system (below Soda Springs Dam) is designed to promote effective management of the fish resources in that river. It is prepared to inform interested ...

  Citation × Citation Citation Abstract Copy Title: North Umpqua River (below Soda Springs Dam) fish management plan Author: Anderson, David M., Oregon. Dept. of Fish and Wildlife "The fish management plan for the North Umpqua River system (below Soda Springs Dam) is designed to promote effective management of the fish resources in that river. It is prepared to inform interested citizens and agencies of management objectives and promote their input in choosing the appropriate courses of action. This plan will eventually merge with the South Umpqua and Smith River plans to form one Umpqua plan. When accepted by the Oregon Fish and Wildlife Commission, the plan will direct fishery decisions on the North Umpqua." (From Introduction) Title: North Umpqua River (below Soda Springs Dam) fish management plan Author: Anderson, David M., Oregon. Dept. of Fish and Wildlife "The fish management plan for the North Umpqua River system (below Soda Springs Dam) is designed to promote effective management of the fish resources in that river. It is prepared to inform interested citizens and agencies of management objectives and promote their input in choosing the appropriate courses of action. This plan will eventually merge with the South Umpqua and Smith River plans to form one Umpqua plan. When accepted by the Oregon Fish and Wildlife Commission, the plan will direct fishery decisions on the North Umpqua." (From Introduction) Close

• 26. [Article] Sediment transport in streams in the Umpqua River Basin, Oregon

  Prepared in cooperation with Douglas County

  Citation × Citation Citation Abstract Copy Title: Sediment transport in streams in the Umpqua River Basin, Oregon Author: Onions, C. A., Douglas County (Or.) Prepared in cooperation with Douglas County Title: Sediment transport in streams in the Umpqua River Basin, Oregon Author: Onions, C. A., Douglas County (Or.) Prepared in cooperation with Douglas County Close

• 27. [Article] Movement and demography of larval coastal giant salamanders (Dicamptodon tenebrosus) in streams with culverts in the Oregon Coast Range

  Barriers to the movement of aquatic organisms can increase the genetic and spatial isolation of populations and may decrease the viability of these regional populations. Focus on culvert passage issues ...

  Citation × Citation Citation Abstract Copy Title: Movement and demography of larval coastal giant salamanders (Dicamptodon tenebrosus) in streams with culverts in the Oregon Coast Range Author: Sagar, Jina P. Barriers to the movement of aquatic organisms can increase the genetic and spatial isolation of populations and may decrease the viability of these regional populations. Focus on culvert passage issues has increased as federal agencies attempt to inventory and replace road-crossing stream culverts that are barriers to the movement of anadromous fish. However, the effect of road-crossing culverts on the movement of other aquatic organisms is not known. The coastal giant salamander (Dicamptodon tenebrosus) is an important component of headwater stream communities and their movement may be affected by culverts in the larval aquatic stage. The objectives of this study were to determine the effect of road-crossing culverts on the movement and survival of larval coastal giant salamanders in the Oregon Coast Range. We conducted a mark-recapture study on larval D. tenebrosus 3rd and 4th order streams to: i) determine culvert use and passage by design type (pipe and arch types) relative to reference stream reaches without culverts; and ii) model larval survival and growth by season, age and culvert presence. We assessed the movement of over 2,000 larval D. tenebrosus in 14 streams and found that larvae were highly sedentary. Mean movement distances did not differ with culvert presence. However, a small portion of larvae (20%) moved sufficient distances to assess culvert passage. Larvae moved less frequently through stream reaches with culverts than stream reaches without culverts, suggesting a barrier effect. There was less upstream movement through pipe culverts than arch culverts. Also, there were lower larval densities in pipe culverts, indicating arch culverts provided more larval habitat. Larval density both inside culverts and in the adjacent stream reaches was associated with the presence of large substrates, which may be important in facilitating larval D. tenebrosus movement through culverts. Stream reaches with culverts were associated with higher levels of fine sediments, however, which may reduce the suitability of near-culvert habitats. Survival estimates indicated high selection pressure early in the larval period. Apparent survival was lower in summer, and for first-year larvae in comparison to second/third-year larvae. Larval survival for both age groups was lower in reaches of stream with culverts although this effect was weak. Culvert effects on movement of coastal giant salamander aquatic larvae indicate they can operate as barriers but their effect on survival remains unclear. Culvert replacements that simulate both the natural stream bed and hydraulic conditions would help provide both habitat and passage opportunities for larval D. tenebrosus. Title: Movement and demography of larval coastal giant salamanders (Dicamptodon tenebrosus) in streams with culverts in the Oregon Coast Range Author: Sagar, Jina P. Barriers to the movement of aquatic organisms can increase the genetic and spatial isolation of populations and may decrease the viability of these regional populations. Focus on culvert passage issues has increased as federal agencies attempt to inventory and replace road-crossing stream culverts that are barriers to the movement of anadromous fish. However, the effect of road-crossing culverts on the movement of other aquatic organisms is not known. The coastal giant salamander (Dicamptodon tenebrosus) is an important component of headwater stream communities and their movement may be affected by culverts in the larval aquatic stage. The objectives of this study were to determine the effect of road-crossing culverts on the movement and survival of larval coastal giant salamanders in the Oregon Coast Range. We conducted a mark-recapture study on larval D. tenebrosus 3rd and 4th order streams to: i) determine culvert use and passage by design type (pipe and arch types) relative to reference stream reaches without culverts; and ii) model larval survival and growth by season, age and culvert presence. We assessed the movement of over 2,000 larval D. tenebrosus in 14 streams and found that larvae were highly sedentary. Mean movement distances did not differ with culvert presence. However, a small portion of larvae (20%) moved sufficient distances to assess culvert passage. Larvae moved less frequently through stream reaches with culverts than stream reaches without culverts, suggesting a barrier effect. There was less upstream movement through pipe culverts than arch culverts. Also, there were lower larval densities in pipe culverts, indicating arch culverts provided more larval habitat. Larval density both inside culverts and in the adjacent stream reaches was associated with the presence of large substrates, which may be important in facilitating larval D. tenebrosus movement through culverts. Stream reaches with culverts were associated with higher levels of fine sediments, however, which may reduce the suitability of near-culvert habitats. Survival estimates indicated high selection pressure early in the larval period. Apparent survival was lower in summer, and for first-year larvae in comparison to second/third-year larvae. Larval survival for both age groups was lower in reaches of stream with culverts although this effect was weak. Culvert effects on movement of coastal giant salamander aquatic larvae indicate they can operate as barriers but their effect on survival remains unclear. Culvert replacements that simulate both the natural stream bed and hydraulic conditions would help provide both habitat and passage opportunities for larval D. tenebrosus. Close

• 28. [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

• 29. [Article] Water temperature prediction and control study, Umpqua River Basin

  Tiller Reservoir In an average year the reservoir is capable of holding water temperatures in South Umpqua River below 70° F. for a wide range of regulation schedules. In a year of maximum temperature, ...

  Citation × Citation Citation Abstract Copy Title: Water temperature prediction and control study, Umpqua River Basin Author: Delay, William H. Tiller Reservoir In an average year the reservoir is capable of holding water temperatures in South Umpqua River below 70° F. for a wide range of regulation schedules. In a year of maximum temperature, it will also hold temperatures below 700 F. but flexibility of operation will be restricted. Regulations designed to control water temperatures in South Umpqua River will have no significant influence on water temperatures in the main stem of the Umpqua River because of the large volume contributed by the unregulated North Umpqua River. Galesville Reservoir The reservoir has the capability to hold water temperatures in Cow Creek below 70° F. in an average year provided nearly the entire storage capacity is regulated for temperature control. In a year of maximum temperature, only about one-half of the length of Cow Creek below the reservoir can be held below 70° F. for the entire summer. Hinkle Reservoir The reservoir is capable of holding water temperatures in Calapooya Creek below 70° F. for all meteorological conditions. Substantial flexibility of reservoir regulation will be available in average years. Title: Water temperature prediction and control study, Umpqua River Basin Author: Delay, William H. Tiller Reservoir In an average year the reservoir is capable of holding water temperatures in South Umpqua River below 70° F. for a wide range of regulation schedules. In a year of maximum temperature, it will also hold temperatures below 700 F. but flexibility of operation will be restricted. Regulations designed to control water temperatures in South Umpqua River will have no significant influence on water temperatures in the main stem of the Umpqua River because of the large volume contributed by the unregulated North Umpqua River. Galesville Reservoir The reservoir has the capability to hold water temperatures in Cow Creek below 70° F. in an average year provided nearly the entire storage capacity is regulated for temperature control. In a year of maximum temperature, only about one-half of the length of Cow Creek below the reservoir can be held below 70° F. for the entire summer. Hinkle Reservoir The reservoir is capable of holding water temperatures in Calapooya Creek below 70° F. for all meteorological conditions. Substantial flexibility of reservoir regulation will be available in average years. Close

• 30. [Article] Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA

  The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region ...

  Citation × Citation Citation Abstract Copy Title: Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA Author: Lampman, Ralph Tatsuo The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region in the past 40 to 50 years. Among the many potential causes of this decline, obstruction of migration routes has likely played a substantial role. Within the North Umpqua River basin in southwest Oregon, USA, I focused on the following three research goals: 1) to describe the passage efficiency and migration routes of adult Pacific lamprey at Winchester Dam; 2) to evaluate the seasonal movement patterns of adult Pacific lamprey and their use of holding habitat at Winchester Dam in relation to temperature conditions; and 3) to portray the diversity of upstream migratory behaviors of adult Pacific lamprey and the environmental factors that influence these behaviors. This radio telemetry study was conducted between March 2009 and August 2011 with a combination of fixed stations and manual tracking. Passage efficiency was low in both years (8% and 19%, respectively), and all tagged lamprey that successfully passed the dam used routes other than the fish ladder. Lamprey that migrated early within the run and those with relatively small tags had higher passage rates and traveled further than the other groups of lamprey. Lamprey released above of the dam or those that passed the dam on their own distributed themselves widely in the upstream environment, suggesting that the dam deterred their upstream migration. Using mark-recapture data for the two years, the adult Pacific lamprey population upstream of Winchester Dam was estimated at 960 (95% C.I. [188, 4760]) in 2009 and 556 (95% C.I. [110, 2798]) in 2010, which was considerably lower than historical counts at the dam (between 14,532-46,785 in 1965-1971). Most tagged lamprey that did not pass the dam remained at the base of the dam at the end of the summer migration (63% in 2009 and 67% in 2010). Types of habitat most frequently used by lamprey downstream from the dam included the dam surface (wooden structures with crevices), interface zones between fast and slow water, and highway bridge pilings. The lamprey movement changed considerably between August and September, and the frequency of movements decreased sharply during this period. Tagged lamprey were detected using thermal refuges immediately downstream of the dam that were 0.4 to 2.8 C° colder than the mean river temperature at the dam, and this temperature differential increased as the season progressed. Lamprey may be seeking overwintering habitat associated with hyporheic exchange flows at the dam towards the end of the summer season after their display of heightened activity early in the summer. Ninety-five percent of the overall upstream migration took place during the first spring/summer period, and only small-scale upstream movements were observed during the winter and second spring/summer (4% and 1%, respectively). The rate of upstream migration (median) was the fastest during the initial migration phase and was 1.9 km/day (ranging from 0.3 to 11.0 km/day) for tagged lamprey released above Winchester Dam. During winter, 71% of the lamprey remained in the same location where they initiated holding. Multiple regression analysis indicated that the total upstream distance traveled by individual lamprey was most strongly related to presence/absence of Winchester Dam, relative tag size, and water temperature and photoperiod conditions at release. The presence of Winchester Dam, large relative tag size, and high water temperature / short photoperiod conditions at release significantly reduced upstream migration distance. Title: Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA Author: Lampman, Ralph Tatsuo The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region in the past 40 to 50 years. Among the many potential causes of this decline, obstruction of migration routes has likely played a substantial role. Within the North Umpqua River basin in southwest Oregon, USA, I focused on the following three research goals: 1) to describe the passage efficiency and migration routes of adult Pacific lamprey at Winchester Dam; 2) to evaluate the seasonal movement patterns of adult Pacific lamprey and their use of holding habitat at Winchester Dam in relation to temperature conditions; and 3) to portray the diversity of upstream migratory behaviors of adult Pacific lamprey and the environmental factors that influence these behaviors. This radio telemetry study was conducted between March 2009 and August 2011 with a combination of fixed stations and manual tracking. Passage efficiency was low in both years (8% and 19%, respectively), and all tagged lamprey that successfully passed the dam used routes other than the fish ladder. Lamprey that migrated early within the run and those with relatively small tags had higher passage rates and traveled further than the other groups of lamprey. Lamprey released above of the dam or those that passed the dam on their own distributed themselves widely in the upstream environment, suggesting that the dam deterred their upstream migration. Using mark-recapture data for the two years, the adult Pacific lamprey population upstream of Winchester Dam was estimated at 960 (95% C.I. [188, 4760]) in 2009 and 556 (95% C.I. [110, 2798]) in 2010, which was considerably lower than historical counts at the dam (between 14,532-46,785 in 1965-1971). Most tagged lamprey that did not pass the dam remained at the base of the dam at the end of the summer migration (63% in 2009 and 67% in 2010). Types of habitat most frequently used by lamprey downstream from the dam included the dam surface (wooden structures with crevices), interface zones between fast and slow water, and highway bridge pilings. The lamprey movement changed considerably between August and September, and the frequency of movements decreased sharply during this period. Tagged lamprey were detected using thermal refuges immediately downstream of the dam that were 0.4 to 2.8 C° colder than the mean river temperature at the dam, and this temperature differential increased as the season progressed. Lamprey may be seeking overwintering habitat associated with hyporheic exchange flows at the dam towards the end of the summer season after their display of heightened activity early in the summer. Ninety-five percent of the overall upstream migration took place during the first spring/summer period, and only small-scale upstream movements were observed during the winter and second spring/summer (4% and 1%, respectively). The rate of upstream migration (median) was the fastest during the initial migration phase and was 1.9 km/day (ranging from 0.3 to 11.0 km/day) for tagged lamprey released above Winchester Dam. During winter, 71% of the lamprey remained in the same location where they initiated holding. Multiple regression analysis indicated that the total upstream distance traveled by individual lamprey was most strongly related to presence/absence of Winchester Dam, relative tag size, and water temperature and photoperiod conditions at release. The presence of Winchester Dam, large relative tag size, and high water temperature / short photoperiod conditions at release significantly reduced upstream migration distance. Close

• 31. [Article] Tidal wetland prioritization for the Smith River Watershed: Umpqua River Estuary of Oregon

  Prepared for: U.S. Fish and Wildlife Service Oregon Coastal Program - Newport Field Office.

  Citation × Citation Citation Abstract Copy Title: Tidal wetland prioritization for the Smith River Watershed: Umpqua River Estuary of Oregon Author: Brophy, Laura, So, Khemarith Prepared for: U.S. Fish and Wildlife Service Oregon Coastal Program - Newport Field Office. Title: Tidal wetland prioritization for the Smith River Watershed: Umpqua River Estuary of Oregon Author: Brophy, Laura, So, Khemarith Prepared for: U.S. Fish and Wildlife Service Oregon Coastal Program - Newport Field Office. Close

• 32. [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

• 33. [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

• 34. [Article] Characterizing patterns of wetland occurrence in Oregon using an interactive geodatabase : a method for conservation planning

  Several state and federal agencies have identified Oregon's coastal wetlands as priority areas for conservation, and in some cases have specifically singled out nontidal (mostly palustrine) wetlands as ...

  Citation × Citation Citation Abstract Copy Title: Characterizing patterns of wetland occurrence in Oregon using an interactive geodatabase : a method for conservation planning Author: Larsen, Jennifer (Jennifer Elizabeth) Several state and federal agencies have identified Oregon's coastal wetlands as priority areas for conservation, and in some cases have specifically singled out nontidal (mostly palustrine) wetlands as a major concern. Recent research has highlighted the need to study and manage wetlands from a regional perspective that considers the distribution of wetlands within the framework of watersheds and ecoregions. Public planning and awareness of coastal palustrine wetlands has been limited by their small size and the lack of digital National Wetlands Inventory (NWI) coverage in the upper reaches of coastal watersheds where many are located. This research was designed to test hypotheses about physiographic and derived topographic variables associated with mapped palustrine wetlands. The study assumed that certain variables were more significant than others in characterizing these wetlands, and sought to identify relationships among variables that were indicative of wetland distributions across watersheds and ecoregions. A three phase approach was demonstrated for characterizing palustrine wetland size and degree of isolation that included designing an enhanced NWI geodatabase of palustrine wetland polygons, creating watershed profiles and wetland demographic statistics, and analyzing the data using exploratory data analysis in the form of decision tree modeling. This study confirmed the ability to provide information on the geographical distributions and relationships existing among environmental variables and mapped wetland polygons. An enhanced understanding of these characteristics has applications for conservation planning including sustainable wetland creation and restoration. Title: Characterizing patterns of wetland occurrence in Oregon using an interactive geodatabase : a method for conservation planning Author: Larsen, Jennifer (Jennifer Elizabeth) Several state and federal agencies have identified Oregon's coastal wetlands as priority areas for conservation, and in some cases have specifically singled out nontidal (mostly palustrine) wetlands as a major concern. Recent research has highlighted the need to study and manage wetlands from a regional perspective that considers the distribution of wetlands within the framework of watersheds and ecoregions. Public planning and awareness of coastal palustrine wetlands has been limited by their small size and the lack of digital National Wetlands Inventory (NWI) coverage in the upper reaches of coastal watersheds where many are located. This research was designed to test hypotheses about physiographic and derived topographic variables associated with mapped palustrine wetlands. The study assumed that certain variables were more significant than others in characterizing these wetlands, and sought to identify relationships among variables that were indicative of wetland distributions across watersheds and ecoregions. A three phase approach was demonstrated for characterizing palustrine wetland size and degree of isolation that included designing an enhanced NWI geodatabase of palustrine wetland polygons, creating watershed profiles and wetland demographic statistics, and analyzing the data using exploratory data analysis in the form of decision tree modeling. This study confirmed the ability to provide information on the geographical distributions and relationships existing among environmental variables and mapped wetland polygons. An enhanced understanding of these characteristics has applications for conservation planning including sustainable wetland creation and restoration. Close

• 35. [Article] Tidal wetland prioritization for the Umpqua River Estuary

  Prepared for U.S. Fish and Wildlife Service Oregon Coastal Program - Newport Field Office.

  Citation × Citation Citation Abstract Copy Title: Tidal wetland prioritization for the Umpqua River Estuary Author: Brophy, Laura, So, Khemarith Prepared for U.S. Fish and Wildlife Service Oregon Coastal Program - Newport Field Office. Title: Tidal wetland prioritization for the Umpqua River Estuary Author: Brophy, Laura, So, Khemarith Prepared for U.S. Fish and Wildlife Service Oregon Coastal Program - Newport Field Office. Close

• 36. [Article] Scenic photo of the Lower North Umpqua River

  Lower North Umpqua River photo

  Citation × Citation Citation Abstract Copy Title: Scenic photo of the Lower North Umpqua River Author: Partnership for the Umpqua Rivers Lower North Umpqua River photo Title: Scenic photo of the Lower North Umpqua River Author: Partnership for the Umpqua Rivers Lower North Umpqua River photo Close

• 37. [Article] Scenic photo of the South Umpqua River above Days Creek

  South Umpqua River photo

  Citation × Citation Citation Abstract Copy Title: Scenic photo of the South Umpqua River above Days Creek Author: Partnership for the Umpqua Rivers South Umpqua River photo Title: Scenic photo of the South Umpqua River above Days Creek Author: Partnership for the Umpqua Rivers South Umpqua River photo Close

• 38. [Article] Scenic photos of the South Umpqua River at Tiller

  South Umpqua River photo

  Citation × Citation Citation Abstract Copy Title: Scenic photos of the South Umpqua River at Tiller Author: Partnership for the Umpqua Rivers South Umpqua River photo Title: Scenic photos of the South Umpqua River at Tiller Author: Partnership for the Umpqua Rivers South Umpqua River photo Close

• 39. [Article] Instream photo from the Upper Umpqua River

  Photo from the Upper Umpqua River

  Citation × Citation Citation Abstract Copy Title: Instream photo from the Upper Umpqua River Author: Partnership for the Umpqua Rivers Photo from the Upper Umpqua River Title: Instream photo from the Upper Umpqua River Author: Partnership for the Umpqua Rivers Photo from the Upper Umpqua River Close

• 40. [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

• 41. [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

• 42. [Article] Scenic photo of the Middle South Umpqua River

  Citation × Citation Citation Abstract Copy Title: Scenic photo of the Middle South Umpqua River Author: Partnership for the Umpqua Rivers Title: Scenic photo of the Middle South Umpqua River Author: Partnership for the Umpqua Rivers Close

• 43. [Article] South_Umpqua_at_Tiller_001.jpg

  Citation × Citation Citation Abstract Copy Title: South_Umpqua_at_Tiller_001.jpg Author: Partnership for the Umpqua Rivers Title: South_Umpqua_at_Tiller_001.jpg Author: Partnership for the Umpqua Rivers Close

• 44. [Article] South_Umpqua_at_Tiller_002.jpg

  Citation × Citation Citation Abstract Copy Title: South_Umpqua_at_Tiller_002.jpg Author: Partnership for the Umpqua Rivers Title: South_Umpqua_at_Tiller_002.jpg Author: Partnership for the Umpqua Rivers Close

• 45. [Article] South_Umpqua_at_Tiller_003.jpg

  Citation × Citation Citation Abstract Copy Title: South_Umpqua_at_Tiller_003.jpg Author: Partnership for the Umpqua Rivers Title: South_Umpqua_at_Tiller_003.jpg Author: Partnership for the Umpqua Rivers Close

• 46. [Article] Fish passage project photo from the Middle Cow Creek Watershed

  Photo from the Middle Cow Creek Watershed

  Citation × Citation Citation Abstract Copy Title: Fish passage project photo from the Middle Cow Creek Watershed Author: Partnership for the Umpqua Rivers Photo from the Middle Cow Creek Watershed Title: Fish passage project photo from the Middle Cow Creek Watershed Author: Partnership for the Umpqua Rivers Photo from the Middle Cow Creek Watershed Close

• 47. [Article] Umpqua Bibliography by Groups

  Archival information about fish and water in the Umpqua Basin can be found in reports housed in disparate locations (e.g., offices of various State and Federal agencies and local organizations). A comprehensive ...

  Citation × Citation Citation Abstract Copy Title: Umpqua Bibliography by Groups Author: Gilmont, Susan Archival information about fish and water in the Umpqua Basin can be found in reports housed in disparate locations (e.g., offices of various State and Federal agencies and local organizations). A comprehensive bibliography of grey literature, important or uncataloged reports, and published reports is one means of recording what research has been conducted. Title: Umpqua Bibliography by Groups Author: Gilmont, Susan Archival information about fish and water in the Umpqua Basin can be found in reports housed in disparate locations (e.g., offices of various State and Federal agencies and local organizations). A comprehensive bibliography of grey literature, important or uncataloged reports, and published reports is one means of recording what research has been conducted. Close

• 48. [Article] Scenic photo of Calapooya Creek

  Calapooya Creek photo

  Citation × Citation Citation Abstract Copy Title: Scenic photo of Calapooya Creek Author: Partnership for the Umpqua Rivers Calapooya Creek photo Title: Scenic photo of Calapooya Creek Author: Partnership for the Umpqua Rivers Calapooya Creek photo Close

• 49. [Article] Scenic photo of Lower Cow Creek

  Citation × Citation Citation Abstract Copy Title: Scenic photo of Lower Cow Creek Author: Partnership for the Umpqua Rivers Title: Scenic photo of Lower Cow Creek Author: Partnership for the Umpqua Rivers Close

• 50. [Article] Scenic photo of the West Fork of Cow Creek

  West Fork of Cow Creek photo

  Citation × Citation Citation Abstract Copy Title: Scenic photo of the West Fork of Cow Creek Author: Partnership for the Umpqua Rivers West Fork of Cow Creek photo Title: Scenic photo of the West Fork of Cow Creek Author: Partnership for the Umpqua Rivers West Fork of Cow Creek photo Close

• 51. [Article] Digital Watersheds: One Library's Approach to Expanding Access to Water Resources Information

  Published in the Proceedings of the Geoscience Information Society, volume 39, 2008.

  Citation × Citation Citation Abstract Copy Title: Digital Watersheds: One Library's Approach to Expanding Access to Water Resources Information Author: Wirth, Andrea A. Published in the Proceedings of the Geoscience Information Society, volume 39, 2008. Title: Digital Watersheds: One Library's Approach to Expanding Access to Water Resources Information Author: Wirth, Andrea A. Published in the Proceedings of the Geoscience Information Society, volume 39, 2008. Close

• 52. [Article] Do vigorous young forests reduce streamflow? Results from up to 54 years of streamflow records in eight paired-watershed experiments in the H. J. Andrews and South Umpqua Experimental Forests

  This study quantified the magnitude and timing of summer streamflow deficits in paired-watershed experiments in the Cascade Range of Oregon where mature and old-growth conifer forests were subjected to ...

  Citation × Citation Citation Abstract Copy Title: Do vigorous young forests reduce streamflow? Results from up to 54 years of streamflow records in eight paired-watershed experiments in the H. J. Andrews and South Umpqua Experimental Forests Author: Perry, Timothy D. This study quantified the magnitude and timing of summer streamflow deficits in paired-watershed experiments in the Cascade Range of Oregon where mature and old-growth conifer forests were subjected to clearcutting, patch cutting, and overstory thinning treatments in the 1960s and 1970s. Hydrologic effects of clearcutting, small-patch cutting, and overstory thinning in the mixed conifer/brush zone were studied (1 watershed (WS) each) in the Coyote Creek WS of the South Umpqua Experimental Forest at 42° 1' 15"N and 122° 43' 30"W. Hydrologic effects of clear cutting (3 WS), shelterwood cutting (1 WS), patch cutting (1 WS), and young forest thinning (1 WS) were examined in the Tsuga heterophylla zone at the H. J. Andrews experimental forest at 44° 14' 0"N and 122° 11' 0" W. Climate of both sites is marine west coast with winter precipitation and dry summers, producing minimum streamflows in August and September. Changes in flow frequency distributions were detected by counting days below streamflow thresholds where the thresholds were established using percentiles from pre-cutting streamflow records. Changes in relative streamflow were established by the station pair method. Summer streamflow deficits were largest and most persistent in 35 to 50-year-old forest plantations created from clearcutting and shelterwood cutting in the 1960s and 1970s. Summer streamflow deficits were smallest and most ephemeral in a stand that experienced 50% overstory thinning in 1971. Summer streamflow deficits of intermediate size and persistence developed in watersheds in which 25 to 30% of the area had been patchcut in the 1960s or 1970s. A sparse (12%) precommercial thin of a 27-year-old stand exhibiting summer streamflow deficits had comparatively little effect on streamflow deficits. Streamflow deficits emerged as early as March or April and persisted into October and November in the warmer, drier site in southern Oregon (Coyote Creek), whereas summer streamflow deficits were restricted to July through September in the cooler, wetter Andrews Forest. These findings are consistent with previous studies demonstrating (1) increases in water use in certain conifer species relative to others (e.g. Douglas-fir versus pine); (2) higher water use in young (i.e., 10 to 50-yr-old) compared to old (100 to 250-yr-old) stands of many tree species; and (3) decreased interception capacity of young relative to old forest stands associated with loss of canopy epiphytes. Results appear to be robust, despite gaps in data availability, uncertainties associated with changes in stream gauging, streamflow trends over time in control watersheds, and multi-decadal fluctuations in regional climate over the study period. These findings support the notion that variable-intensity logging prescriptions over small areas to approximate natural forest structure may have the least effect on summer streamflows. However, more research, preferably new paired watershed experiments, is needed to quantify the magnitude and duration of summer streamflow effects from various levels of overstory and understory thinning treatments. Title: Do vigorous young forests reduce streamflow? Results from up to 54 years of streamflow records in eight paired-watershed experiments in the H. J. Andrews and South Umpqua Experimental Forests Author: Perry, Timothy D. This study quantified the magnitude and timing of summer streamflow deficits in paired-watershed experiments in the Cascade Range of Oregon where mature and old-growth conifer forests were subjected to clearcutting, patch cutting, and overstory thinning treatments in the 1960s and 1970s. Hydrologic effects of clearcutting, small-patch cutting, and overstory thinning in the mixed conifer/brush zone were studied (1 watershed (WS) each) in the Coyote Creek WS of the South Umpqua Experimental Forest at 42° 1' 15"N and 122° 43' 30"W. Hydrologic effects of clear cutting (3 WS), shelterwood cutting (1 WS), patch cutting (1 WS), and young forest thinning (1 WS) were examined in the Tsuga heterophylla zone at the H. J. Andrews experimental forest at 44° 14' 0"N and 122° 11' 0" W. Climate of both sites is marine west coast with winter precipitation and dry summers, producing minimum streamflows in August and September. Changes in flow frequency distributions were detected by counting days below streamflow thresholds where the thresholds were established using percentiles from pre-cutting streamflow records. Changes in relative streamflow were established by the station pair method. Summer streamflow deficits were largest and most persistent in 35 to 50-year-old forest plantations created from clearcutting and shelterwood cutting in the 1960s and 1970s. Summer streamflow deficits were smallest and most ephemeral in a stand that experienced 50% overstory thinning in 1971. Summer streamflow deficits of intermediate size and persistence developed in watersheds in which 25 to 30% of the area had been patchcut in the 1960s or 1970s. A sparse (12%) precommercial thin of a 27-year-old stand exhibiting summer streamflow deficits had comparatively little effect on streamflow deficits. Streamflow deficits emerged as early as March or April and persisted into October and November in the warmer, drier site in southern Oregon (Coyote Creek), whereas summer streamflow deficits were restricted to July through September in the cooler, wetter Andrews Forest. These findings are consistent with previous studies demonstrating (1) increases in water use in certain conifer species relative to others (e.g. Douglas-fir versus pine); (2) higher water use in young (i.e., 10 to 50-yr-old) compared to old (100 to 250-yr-old) stands of many tree species; and (3) decreased interception capacity of young relative to old forest stands associated with loss of canopy epiphytes. Results appear to be robust, despite gaps in data availability, uncertainties associated with changes in stream gauging, streamflow trends over time in control watersheds, and multi-decadal fluctuations in regional climate over the study period. These findings support the notion that variable-intensity logging prescriptions over small areas to approximate natural forest structure may have the least effect on summer streamflows. However, more research, preferably new paired watershed experiments, is needed to quantify the magnitude and duration of summer streamflow effects from various levels of overstory and understory thinning treatments. Close

• 53. [Article] An inventory of filled lands in the Umpqua River Estuary

  Master files scanned at 600 dpi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 dpi (256 B&W) using Capture Perfect 3.0 and OmniPage Professional ...

  Citation × Citation Citation Abstract Copy Title: An inventory of filled lands in the Umpqua River Estuary Author: Hamilton, Stanley F., Advisory Committee to the State Land Board Master files scanned at 600 dpi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 dpi (256 B&W) using Capture Perfect 3.0 and OmniPage Professional 15.0 for textual OCR on a Canon DR-9080C. Title: An inventory of filled lands in the Umpqua River Estuary Author: Hamilton, Stanley F., Advisory Committee to the State Land Board Master files scanned at 600 dpi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 dpi (256 B&W) using Capture Perfect 3.0 and OmniPage Professional 15.0 for textual OCR on a Canon DR-9080C. Close

• 54. [Article] Thirty-five years of forest succession in southwest Oregon : vegetation response to three distinct logging treatments

  This study examined patterns and controls on 35-years of forest succession following logging in the 236 ha South Umpqua Experimental Forest within the Umpqua National Forest in southwestern Oregon. Prior ...

  Citation × Citation Citation Abstract Copy Title: Thirty-five years of forest succession in southwest Oregon : vegetation response to three distinct logging treatments Author: Arthur, Aaron Stone This study examined patterns and controls on 35-years of forest succession following logging in the 236 ha South Umpqua Experimental Forest within the Umpqua National Forest in southwestern Oregon. Prior to logging, the overstory in all three watersheds (~50% cover) was composed of Douglas-fir (30-40% cover), grand fir (2 to 10% cover), incense cedar (2-4% cover), western hemlock (1-2 % cover), sugar pine (1-2% cover), ponderosa pine (0-1% cover), and madrone (0-1% cover). The sapling cover in all three watersheds (30-35% cover) was dominated by grand fir (15-20%), western hemlock (6-8% cover) incense cedar (3-5% cover), and Douglas-fir (3-5% cover), with <1% cover by the other tree species. In 1971, the overstory of the four watersheds received: WS-1 (69.2 ha) a 50% basal area removal (shelterwood); WS-2 (68.4 ha) 30% in 20 small clearcuts; WS-3 (49.8 ha) 100% clearcut; WS-4 (48.6 ha) uncut control. Prior to treatment, tree, shrub, and herb cover in WS 1-3 (n = 50 plots) was visually estimated using the reconnaissance survey method, but only WS 2-3 annually through 1981 (n = 39 plots). In 2006, plots were relocated and new plots added, and resurveyed (n = 77 plots). Plots were classified by environmental (aspect, slope, soil series, vegetation community) and disturbance factors (treatment, logging method, in-watershed location, and soil disturbance). Vegetation was classed into three groups: (1) vegetation structures; (2) overstory species; and (3) residual and invader understory species. Total vegetation cover decreased slightly over the 35-year period, with a slight decrease in shrubs, saplings, and herbs, and an increase in overstory tree cover in 2006 compared to 1971. Few statistically significant differences were observed in vegetation cover change according to environmental variables. However heavily disturbed sites were characterized by low shrub cover and high overstory cover, compared to lightly disturbed sites. These differences were still apparent 35 years after logging. Between 1971 and 2006 in WS-2 and WS-3, Douglas fir, incense cedar and ponderosa pine cover significantly increased, while other overstory species declined. In contrast, over the same period in WS-1, there was a significant change in grand fir and western hemlock cover. Sapling cover of all species stayed constant or declined in all watersheds, except Douglas-fir and western hemlock, which increased in WS-1 only. In the post-logging period, cover of ponderosa pine and Douglas fir cover was significantly higher on moderately and heavily disturbed plots compared to lightly disturbed plots. Before logging, residual species cover was significantly higher than invader species cover. Disturbance appeared to have the greatest effect upon the residual-invader species relationship. Residual species maintained higher cover on lightly disturbed plots, compared to invader species cover, which was highest on moderately and heavily disturbed plots. All species declined in WS-2 and WS-3 following stem exclusion. Overall patterns of tree, shrub, and herb cover succession over the 35-year post-logging period were consistent with the expected effects of clearcutting versus thinning on light levels and their interactions with known shade tolerances of tree species. Additionally, results were consistent with previously documented site disturbance effects on regeneration of residual and invader species, and shrub-tree competition and regeneration. These results permit prediction of the likely consequences for these 35-yr-old forest stands, and the thinned mature forest, of future, planned thinning treatments. Title: Thirty-five years of forest succession in southwest Oregon : vegetation response to three distinct logging treatments Author: Arthur, Aaron Stone This study examined patterns and controls on 35-years of forest succession following logging in the 236 ha South Umpqua Experimental Forest within the Umpqua National Forest in southwestern Oregon. Prior to logging, the overstory in all three watersheds (~50% cover) was composed of Douglas-fir (30-40% cover), grand fir (2 to 10% cover), incense cedar (2-4% cover), western hemlock (1-2 % cover), sugar pine (1-2% cover), ponderosa pine (0-1% cover), and madrone (0-1% cover). The sapling cover in all three watersheds (30-35% cover) was dominated by grand fir (15-20%), western hemlock (6-8% cover) incense cedar (3-5% cover), and Douglas-fir (3-5% cover), with <1% cover by the other tree species. In 1971, the overstory of the four watersheds received: WS-1 (69.2 ha) a 50% basal area removal (shelterwood); WS-2 (68.4 ha) 30% in 20 small clearcuts; WS-3 (49.8 ha) 100% clearcut; WS-4 (48.6 ha) uncut control. Prior to treatment, tree, shrub, and herb cover in WS 1-3 (n = 50 plots) was visually estimated using the reconnaissance survey method, but only WS 2-3 annually through 1981 (n = 39 plots). In 2006, plots were relocated and new plots added, and resurveyed (n = 77 plots). Plots were classified by environmental (aspect, slope, soil series, vegetation community) and disturbance factors (treatment, logging method, in-watershed location, and soil disturbance). Vegetation was classed into three groups: (1) vegetation structures; (2) overstory species; and (3) residual and invader understory species. Total vegetation cover decreased slightly over the 35-year period, with a slight decrease in shrubs, saplings, and herbs, and an increase in overstory tree cover in 2006 compared to 1971. Few statistically significant differences were observed in vegetation cover change according to environmental variables. However heavily disturbed sites were characterized by low shrub cover and high overstory cover, compared to lightly disturbed sites. These differences were still apparent 35 years after logging. Between 1971 and 2006 in WS-2 and WS-3, Douglas fir, incense cedar and ponderosa pine cover significantly increased, while other overstory species declined. In contrast, over the same period in WS-1, there was a significant change in grand fir and western hemlock cover. Sapling cover of all species stayed constant or declined in all watersheds, except Douglas-fir and western hemlock, which increased in WS-1 only. In the post-logging period, cover of ponderosa pine and Douglas fir cover was significantly higher on moderately and heavily disturbed plots compared to lightly disturbed plots. Before logging, residual species cover was significantly higher than invader species cover. Disturbance appeared to have the greatest effect upon the residual-invader species relationship. Residual species maintained higher cover on lightly disturbed plots, compared to invader species cover, which was highest on moderately and heavily disturbed plots. All species declined in WS-2 and WS-3 following stem exclusion. Overall patterns of tree, shrub, and herb cover succession over the 35-year post-logging period were consistent with the expected effects of clearcutting versus thinning on light levels and their interactions with known shade tolerances of tree species. Additionally, results were consistent with previously documented site disturbance effects on regeneration of residual and invader species, and shrub-tree competition and regeneration. These results permit prediction of the likely consequences for these 35-yr-old forest stands, and the thinned mature forest, of future, planned thinning treatments. Close

• 55. [Article] Prediction of peak flows for culvert design on small watersheds in Oregon

  Forest engineers must frequently make flood frequency estimates for very small watersheds when designing culvert installations. Empirical formulae and simplified rainfall runoff models, the most commonly ...

  Citation × Citation Citation Abstract Copy Title: Prediction of peak flows for culvert design on small watersheds in Oregon Author: Campbell, Alan J. Forest engineers must frequently make flood frequency estimates for very small watersheds when designing culvert installations. Empirical formulae and simplified rainfall runoff models, the most commonly used techniques to predict floods from very small watersheds, require considerable engineering judgement to give reasonable results. As an alternative to such methods, this study presents equations to predict peak flows on small watersheds in Oregon. The equations were developed from 80 watersheds ranging in size from 0.21 to 10.60 square miles. Oregon was divided into six physiographic regions based on previous flood frequency studies. In each region, annual peak flow data from gaging stations with more than 20 years of record were analyzed using four flood frequency distributions (Gumbel, two-parameter log-normal, three-parameter log-normal, log Pearson type III). The log Pearson type III distribution was found to be suitable for use in all regions of the state, based on the chi-square goodness of fit test. Flood magnitudes having recurrence intervals of 10, 25, 50, and 100 years were related to physical and climatic indices of drainage basins by multiple regression analysis. Drainage basin area (A) was the most important variable in explaining the variation of flood peaks in all regions. Mean basin elevation (E) and mean annual precipitation (P) were also significantly related to flood peaks in two regions in western Oregon. The following equations to predict the 25-year flood were developed for each physiographic region in Oregon: (1) Willamette region Q₂₅ = 156A·⁸⁰ (2) Coast region Q₂₅ = 6.31A¹⁰¹E·⁵¹ (3) Cascade region Q₂₅ = .O32A⁴⁴P¹·⁹⁷ (4) Rogue-Umpqua region Q₂₅ = l63A·⁷⁷ (5) Blue-Wallowa region Q₂₅ = 67.6A·⁴⁷ Title: Prediction of peak flows for culvert design on small watersheds in Oregon Author: Campbell, Alan J. Forest engineers must frequently make flood frequency estimates for very small watersheds when designing culvert installations. Empirical formulae and simplified rainfall runoff models, the most commonly used techniques to predict floods from very small watersheds, require considerable engineering judgement to give reasonable results. As an alternative to such methods, this study presents equations to predict peak flows on small watersheds in Oregon. The equations were developed from 80 watersheds ranging in size from 0.21 to 10.60 square miles. Oregon was divided into six physiographic regions based on previous flood frequency studies. In each region, annual peak flow data from gaging stations with more than 20 years of record were analyzed using four flood frequency distributions (Gumbel, two-parameter log-normal, three-parameter log-normal, log Pearson type III). The log Pearson type III distribution was found to be suitable for use in all regions of the state, based on the chi-square goodness of fit test. Flood magnitudes having recurrence intervals of 10, 25, 50, and 100 years were related to physical and climatic indices of drainage basins by multiple regression analysis. Drainage basin area (A) was the most important variable in explaining the variation of flood peaks in all regions. Mean basin elevation (E) and mean annual precipitation (P) were also significantly related to flood peaks in two regions in western Oregon. The following equations to predict the 25-year flood were developed for each physiographic region in Oregon: (1) Willamette region Q₂₅ = 156A·⁸⁰ (2) Coast region Q₂₅ = 6.31A¹⁰¹E·⁵¹ (3) Cascade region Q₂₅ = .O32A⁴⁴P¹·⁹⁷ (4) Rogue-Umpqua region Q₂₅ = l63A·⁷⁷ (5) Blue-Wallowa region Q₂₅ = 67.6A·⁴⁷ Close

• 56. [Article] Particulate organic matter export by two contrasting small mountainous rivers from the Pacific Northwest, U.S.A.

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/.

  Citation × Citation Citation Abstract Copy Title: Particulate organic matter export by two contrasting small mountainous rivers from the Pacific Northwest, U.S.A. Author: Hatten, Jeff A., Goni, Miguel A., Borgeld, Jeffry C., Wheatcroft, Robert A. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. Title: Particulate organic matter export by two contrasting small mountainous rivers from the Pacific Northwest, U.S.A. Author: Hatten, Jeff A., Goni, Miguel A., Borgeld, Jeffry C., Wheatcroft, Robert A. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. Close

• 57. [Article] The ecological legacy of Indian burning practices in southwestern Oregon

  Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to ecosystem change ...

  Citation × Citation Citation Abstract Copy Title: The ecological legacy of Indian burning practices in southwestern Oregon Author: Carloni, Kenneth R. Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to ecosystem change in southwestern Oregon? A brief introduction to the Little River study area is followed by a cultural and ecological history of the watershed. Historical, ecological and archaeological data are used to describe shifts in landscape structure, stand structure and fire behavior. Changes in corridor/patch/matrix relationships, increases in stand densities, and changes in stand age and species structure are documented, and changes in fire dynamics from frequent to infrequent, and small to large are corroborated with descriptive statistics from the nearby 2002 Umpqua Fires. Hypotheses are then proposed to test the relative influence of humans vs. climate on landscape change during Aboriginal (<1820) vs. Euroagrarian (1850-1950) cultural phases. While precipitation shows no correlation with fire frequency or tree recruitment before 1820, significant associations are observed from 1850 to 1950. Moreover, a significant correlation exists between fire frequency and subsequent tree recruitment after 1850, but is not observed during aboriginal times. This suggests that indigenous management fires may have obscured precipitation influences that become apparent only after 1850. In order to test spatial hypotheses concerning the associations between indigenous humans and the landscape, archaeological sites were digitized into a GIS, and ergonomic pathways were modeled between them. These maps are then compared to historically fire-maintained upland meadows interpreted from 1946 aerial photos. A significant spatial correlation was found between archaeological sites and historic meadows, and a highly significant spatial correlation was found between modeled travel networks and historic meadows. The close spatial association between cultural features and fire-maintained habitats again suggests active landscape management by local Indians. These associations are corroborated with historical records. After summarizing the shifts in ecological conditions and describing current conditions, I argue that while restoring the landscape to aboriginal conditions is no longer possible, emulating those conditions within the framework of the Little River Adaptive Management Area Plan can improve the resilience and productivity of the Little River watershed. Title: The ecological legacy of Indian burning practices in southwestern Oregon Author: Carloni, Kenneth R. Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to ecosystem change in southwestern Oregon? A brief introduction to the Little River study area is followed by a cultural and ecological history of the watershed. Historical, ecological and archaeological data are used to describe shifts in landscape structure, stand structure and fire behavior. Changes in corridor/patch/matrix relationships, increases in stand densities, and changes in stand age and species structure are documented, and changes in fire dynamics from frequent to infrequent, and small to large are corroborated with descriptive statistics from the nearby 2002 Umpqua Fires. Hypotheses are then proposed to test the relative influence of humans vs. climate on landscape change during Aboriginal (<1820) vs. Euroagrarian (1850-1950) cultural phases. While precipitation shows no correlation with fire frequency or tree recruitment before 1820, significant associations are observed from 1850 to 1950. Moreover, a significant correlation exists between fire frequency and subsequent tree recruitment after 1850, but is not observed during aboriginal times. This suggests that indigenous management fires may have obscured precipitation influences that become apparent only after 1850. In order to test spatial hypotheses concerning the associations between indigenous humans and the landscape, archaeological sites were digitized into a GIS, and ergonomic pathways were modeled between them. These maps are then compared to historically fire-maintained upland meadows interpreted from 1946 aerial photos. A significant spatial correlation was found between archaeological sites and historic meadows, and a highly significant spatial correlation was found between modeled travel networks and historic meadows. The close spatial association between cultural features and fire-maintained habitats again suggests active landscape management by local Indians. These associations are corroborated with historical records. After summarizing the shifts in ecological conditions and describing current conditions, I argue that while restoring the landscape to aboriginal conditions is no longer possible, emulating those conditions within the framework of the Little River Adaptive Management Area Plan can improve the resilience and productivity of the Little River watershed. Close

• 58. [Article] Wolf Creek Monitoring

  Presented at The Oregon Water Conference, May 24-25, 2011, Corvallis, OR.

  Citation × Citation Citation Abstract Copy Title: Wolf Creek Monitoring Author: Dammann, Daniel Presented at The Oregon Water Conference, May 24-25, 2011, Corvallis, OR. Title: Wolf Creek Monitoring Author: Dammann, Daniel Presented at The Oregon Water Conference, May 24-25, 2011, Corvallis, OR. Close

• 59. [Article] Summertime water temperature trends in Steamboat Creek Basin, Umpqua National Forest

  The Steamboat Creek basin drains 227 mi² (588 km²) of steep forested terrain into the North Umpqua River of Southwest Oregon, 39 mi (63 km) northeast of Roseburg. Summer base flows for Steamboat Creek ...

  Citation × Citation Citation Abstract Copy Title: Summertime water temperature trends in Steamboat Creek Basin, Umpqua National Forest Author: Holaday, Steven A. The Steamboat Creek basin drains 227 mi² (588 km²) of steep forested terrain into the North Umpqua River of Southwest Oregon, 39 mi (63 km) northeast of Roseburg. Summer base flows for Steamboat Creek average 83 cfs (2.35 m³/sec). Steamboat Creek and its tributaries are considered important to the production of summer-run steelhead; the basin has been closed to angling since 1932. Harvesting has occurred in every subdrainage of the Steamboat Creek basin. Trees were routinely removed from riparian areas when harvesting in the basin began in 1955. Since the mid-1970s to early-1980s, however, buffer strips were left adjacent to streams. In addition, the floods of 1964-65 caused significant damage to riparian vegetation in the basin. This study was undertaken to: (1) determine long-term trends over the period 1969-90 of summertime water temperatures in the mainstem of Steamboat Creek, selected tributaries, and in Boulder Creek, an unharvested control stream in an adjacent watershed and (2) evaluate spacial patterns of maximum water temperatures in the Steamboat Creek basin during the summer of 1990. Significant (P≤0.10) trends of decreasing maximum daily summertime stream temperatures on Steamboat Creek and tributaries occurred from 1969-90. In contrast, an unharvested control stream showed a small, but nonsignificant, increasing trend in stream temperatures. The largest decrease in maximum stream temperatures (7 to 11°F, 3.9 to 6.1°C) occurred on small streams with summer base flows less than 6 cfs (0.17 m³/sec). These streams also had the highest proportion of stream length adjacent to harvesting activities before 1974. The smallest decrease in maximum stream temperatures (0 to 3°F, 0 to 1.7°C) occurred on streams with little or no history of timber harvest activity along riparian areas, or at locations where summer base flows were greater than 15 cfs (0.42 m³/sec). Since no trends in either air temperature or streamflow were apparent over the 1969-90 period, regrowth of riparian vegetation that was previously removed by flooding, debris torrents, or streamside harvesting, appears to be the major cause of trends in decreasing maximum summer stream temperature. Regrowth of riparian vegetation provides shade over small streams, decreasing energy input to the stream from solar radiation. Maximum daily stream temperatures in lower Steamboat Creek did not change significantly during the 1969-90 study period and stream temperature data in 1960 indicates that maximum stream temperatures in lower Steamboat Creek have historically been high. Any cooling effects by groundwater or tributaries are largely negated by the large volume of water in the main channel. Also, the large stream width renders riparian vegetation relatively ineffective in protecting the stream from solar radiation. Minimum stream temperatures decreased during the 1969-90 study period for all of the long-term stations in the Steamboat Creek basin while the control stream showed a slight increasing trend. Similarly, diurnal stream temperature fluctuations decreased for several tributaries. Title: Summertime water temperature trends in Steamboat Creek Basin, Umpqua National Forest Author: Holaday, Steven A. The Steamboat Creek basin drains 227 mi² (588 km²) of steep forested terrain into the North Umpqua River of Southwest Oregon, 39 mi (63 km) northeast of Roseburg. Summer base flows for Steamboat Creek average 83 cfs (2.35 m³/sec). Steamboat Creek and its tributaries are considered important to the production of summer-run steelhead; the basin has been closed to angling since 1932. Harvesting has occurred in every subdrainage of the Steamboat Creek basin. Trees were routinely removed from riparian areas when harvesting in the basin began in 1955. Since the mid-1970s to early-1980s, however, buffer strips were left adjacent to streams. In addition, the floods of 1964-65 caused significant damage to riparian vegetation in the basin. This study was undertaken to: (1) determine long-term trends over the period 1969-90 of summertime water temperatures in the mainstem of Steamboat Creek, selected tributaries, and in Boulder Creek, an unharvested control stream in an adjacent watershed and (2) evaluate spacial patterns of maximum water temperatures in the Steamboat Creek basin during the summer of 1990. Significant (P≤0.10) trends of decreasing maximum daily summertime stream temperatures on Steamboat Creek and tributaries occurred from 1969-90. In contrast, an unharvested control stream showed a small, but nonsignificant, increasing trend in stream temperatures. The largest decrease in maximum stream temperatures (7 to 11°F, 3.9 to 6.1°C) occurred on small streams with summer base flows less than 6 cfs (0.17 m³/sec). These streams also had the highest proportion of stream length adjacent to harvesting activities before 1974. The smallest decrease in maximum stream temperatures (0 to 3°F, 0 to 1.7°C) occurred on streams with little or no history of timber harvest activity along riparian areas, or at locations where summer base flows were greater than 15 cfs (0.42 m³/sec). Since no trends in either air temperature or streamflow were apparent over the 1969-90 period, regrowth of riparian vegetation that was previously removed by flooding, debris torrents, or streamside harvesting, appears to be the major cause of trends in decreasing maximum summer stream temperature. Regrowth of riparian vegetation provides shade over small streams, decreasing energy input to the stream from solar radiation. Maximum daily stream temperatures in lower Steamboat Creek did not change significantly during the 1969-90 study period and stream temperature data in 1960 indicates that maximum stream temperatures in lower Steamboat Creek have historically been high. Any cooling effects by groundwater or tributaries are largely negated by the large volume of water in the main channel. Also, the large stream width renders riparian vegetation relatively ineffective in protecting the stream from solar radiation. Minimum stream temperatures decreased during the 1969-90 study period for all of the long-term stations in the Steamboat Creek basin while the control stream showed a slight increasing trend. Similarly, diurnal stream temperature fluctuations decreased for several tributaries. Close

• 60. [Article] Trees, snow and flooding: an investigation of forest canopy effects on snow accumulation and melt at the plot and watershed scales in the Pacific Northwest

  Concerns about the extent to which major Pacific Northwest floods over the last decade might have been exacerbated by logging have heightened the need for a better scientific understanding of the role ...

  Citation × Citation Citation Abstract Copy Title: Trees, snow and flooding: an investigation of forest canopy effects on snow accumulation and melt at the plot and watershed scales in the Pacific Northwest Author: Storck, Pascal Concerns about the extent to which major Pacific Northwest floods over the last decade might have been exacerbated by logging have heightened the need for a better scientific understanding of the role of forest maturity on snow accumulation and melt. To address this need, a multi-scale field and modeling study of the effects of forest canopies on snow accumulation and melt was conducted. Over a three year period, weighing lysimeters and cut-tree experiments were used to measure the process controlling snow interception and its fate at a site in the Umpqua National Forest, OR (elevation 1200 m). Continuous observations of below-canopy snowpack evolution were made over the same period. Over the study period, approximately 60 percent of annual snowfall was intercepted by the canopy (up to a maximum of 40 mm water equivalent). Approximately 72 percent and 28 percent of the intercepted snow was removed as meltwater drip and large snow masses, respectively. Apparent average sublimation rates from the intercepted snow were less than 1 mm per day and totaled approximately 100 mm per winter season. Title: Trees, snow and flooding: an investigation of forest canopy effects on snow accumulation and melt at the plot and watershed scales in the Pacific Northwest Author: Storck, Pascal Concerns about the extent to which major Pacific Northwest floods over the last decade might have been exacerbated by logging have heightened the need for a better scientific understanding of the role of forest maturity on snow accumulation and melt. To address this need, a multi-scale field and modeling study of the effects of forest canopies on snow accumulation and melt was conducted. Over a three year period, weighing lysimeters and cut-tree experiments were used to measure the process controlling snow interception and its fate at a site in the Umpqua National Forest, OR (elevation 1200 m). Continuous observations of below-canopy snowpack evolution were made over the same period. Over the study period, approximately 60 percent of annual snowfall was intercepted by the canopy (up to a maximum of 40 mm water equivalent). Approximately 72 percent and 28 percent of the intercepted snow was removed as meltwater drip and large snow masses, respectively. Apparent average sublimation rates from the intercepted snow were less than 1 mm per day and totaled approximately 100 mm per winter season. Close

• 61. [Article] Distribution, abundance, and emigration of juvenile steelhead (Oncorhynchus mykiss), and analysis of stream habitat in the Steamboat Creek Basin, Oregon

  Snorkel dive estimates and an inventory of stream habitat of the juvenile steelhead (Oncorhynchus mykiss) population in the Steamboat Creek basin were made in the summers of 1987 and 1988. Emigration was monitored ...

  Citation × Citation Citation Abstract Copy Title: Distribution, abundance, and emigration of juvenile steelhead (Oncorhynchus mykiss), and analysis of stream habitat in the Steamboat Creek Basin, Oregon Author: Dambacher, Jeffrey M. Snorkel dive estimates and an inventory of stream habitat of the juvenile steelhead (Oncorhynchus mykiss) population in the Steamboat Creek basin were made in the summers of 1987 and 1988. Emigration was monitored by fish trapping from spring through fall of 1988. Distribution, abundance, and habitat utilization of juvenile steelhead were affected by stream size and temperature. The majority (65%) of age >1 fish were in two mainstem channels, whereas numbers of age 0 fish were more evenly distributed throughout the basin. Age >1 fish significantly (P<O.005) increased their use of riffles with depth, and avoided shallow riffles. Where riffles were apparently too shallow, age >1 steelhead utilized pool habitat to a greater extent. Age >1 steelhead greatly avoided glides in all sizes of channels. Age 0 steelhead appeared to be less restricted in their choice of habitat than age >1 fish. Age 0 fish, presumably by virtue of a smaller body size, showed only slightly increased use of riffles with depth. Both age 0 and >1 steelhead increased their use of riffles in streams with higher temperature regimes. Densities of age >1 fish in channels with large boulder substrate increased significantly (p=O.02) with mean riffle depth, probably as a function of more wetted area being useable in streams with deep riffles, and more feeding microhabitats being afforded by rough channels. Densities of age 0 fish did not appear to be affected by the range of stream sizes studied, or by channel roughness, but were low in all channels with high stream temperatures. Compared to other steelhead producing streams, Steamboat Creek had low summer rearing densities, small smolts, and an exceptionally high proportion of fish emigrating as parr (considered to be at least one year away from development of smolt characteristics). Roughly 120,000 age 0 steelhead, 60,000 parr, and 4,100 steelhead smolts were estimated to have emigrated from the basin. Most parr emigrated in the spring when stream flows were high, whereas the majority of age 0 fish emigrated during summer base flow recession. I suggest that parr emigration from Steamboat Creek may be a life history adaptation that takes advantage of rearing conditions downstream in the North Umpqua River. Title: Distribution, abundance, and emigration of juvenile steelhead (Oncorhynchus mykiss), and analysis of stream habitat in the Steamboat Creek Basin, Oregon Author: Dambacher, Jeffrey M. Snorkel dive estimates and an inventory of stream habitat of the juvenile steelhead (Oncorhynchus mykiss) population in the Steamboat Creek basin were made in the summers of 1987 and 1988. Emigration was monitored by fish trapping from spring through fall of 1988. Distribution, abundance, and habitat utilization of juvenile steelhead were affected by stream size and temperature. The majority (65%) of age >1 fish were in two mainstem channels, whereas numbers of age 0 fish were more evenly distributed throughout the basin. Age >1 fish significantly (P<O.005) increased their use of riffles with depth, and avoided shallow riffles. Where riffles were apparently too shallow, age >1 steelhead utilized pool habitat to a greater extent. Age >1 steelhead greatly avoided glides in all sizes of channels. Age 0 steelhead appeared to be less restricted in their choice of habitat than age >1 fish. Age 0 fish, presumably by virtue of a smaller body size, showed only slightly increased use of riffles with depth. Both age 0 and >1 steelhead increased their use of riffles in streams with higher temperature regimes. Densities of age >1 fish in channels with large boulder substrate increased significantly (p=O.02) with mean riffle depth, probably as a function of more wetted area being useable in streams with deep riffles, and more feeding microhabitats being afforded by rough channels. Densities of age 0 fish did not appear to be affected by the range of stream sizes studied, or by channel roughness, but were low in all channels with high stream temperatures. Compared to other steelhead producing streams, Steamboat Creek had low summer rearing densities, small smolts, and an exceptionally high proportion of fish emigrating as parr (considered to be at least one year away from development of smolt characteristics). Roughly 120,000 age 0 steelhead, 60,000 parr, and 4,100 steelhead smolts were estimated to have emigrated from the basin. Most parr emigrated in the spring when stream flows were high, whereas the majority of age 0 fish emigrated during summer base flow recession. I suggest that parr emigration from Steamboat Creek may be a life history adaptation that takes advantage of rearing conditions downstream in the North Umpqua River. Close