Tualatin River Rapid Bio-Assessment, Summer 2013

  Bio-Surveys, LLC conducted snorkel surveys to determine the distribution and abundance of juvenile salmonids in 138.2 miles of Gales Creek, Upper Tualatin River, and the Dairy-McKay Creek watersheds in the summer of 2013 and 91.8 miles of Gales, East … Continue reading

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Bureau of Reclamation Reimbursement Contract

In 2002, the Council entered into an agreement with the US Bureau of Reclamation (BOR)  to conduct mitigation work for the Scoggins Dam Project.  Under this agreement (BOR Contract), the Council receives $30,000 per year for studies, project planning, education, … Continue reading

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Fish and Macroinvertebrate Studies

Over the years, the Department of Environmental Quality and Clean Water Services (formerly called Unified Sewerage Agency) have done studies on fish, macroinvertebrates and habitat in the Tualatin Basin. Continue reading

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Tualatin River Watershed Technical Supplement, 1998

  Tualatin River Watershed Technical Supplement, 1998 (21 MB) Due to size considerations the report and maps have been split into separate files. Tualatin River Watershed Technical Supplement 1998 without maps (973 KB) Figure 1-2 Tualatin River Watershed Base Map … Continue reading

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Tualatin Basin Watershed Maps

In 2001, The Council produces a Tualatin River Watershed Atlas. These maps cover political boundaries, ecoregions, fish populations, road density, floodplains, elevations, geology, general soil classifications land ownership, population density, vegetation types, hydric soils, water quality, watersheds, and zoning. Continue reading

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Upper Tualatin – Scoggins Watershed Analysis, 2000

The watershed analysis is a detailed study of all aspects of the watershed’s condition. A four-page summary is also available. Continue reading

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Dairy – McKay Watershed Analysis, 1999

the watershed analysis is a detailed study of all aspects of the watershed’s condition. A four-page summary is also available. Continue reading

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Lower Tualatin Watershed Analysis 2001

The watershed analysis is a detailed study of all aspects of the watershed’s condition. A four-page summary is also available. Continue reading

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Middle Tualatin – Rock Creek Watershed Analysis 2001

The watershed analysis is a detailed study of all aspects of the watershed’s condition. A four-page summary is also available. Continue reading

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Lower Gales Creek Habitat Enhancement Plan

The Lower Gales Creek Habitat Enhancement Plan was done to develop more detailed information for planning restoration projects in this area of Gales Creek. Continue reading

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Lower Gales Creek Enhancement Planning Geomorphic Assessment Study

The Lower Gales Creek geomorphic assessment was done to inform potential projects on lower Gales Creek. Continue reading

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Gales Creek Large Woody Debris Inventory Report

The Gales Creek large woody debris inventory was conducted to determine where large wood would enhance the habitat for salmonoids. Continue reading

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Lower Gales Creek Enhancement Plan, Knotweed and Ivy Mapping and Report

The lower Gales Creek knotweed and ivy mapping report documents where these invasive weeds are present. Continue reading

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Gales Creek Watershed Analysis 1998

The watershed analysis is a detailed study of all aspects of the watershed’s condition. A four-page summary is also available. Continue reading

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