Project Overview
The Condit Hydroelectric Project is located in south-central Washington on the White Salmon River in Klickitat and Skamania Counties ( map of Condit Hydro Project). The project has a generating capacity of 14.7 MW. Condit dam is located 3.3 miles (5.3 km) upstream from the confluence of the White Salmon and Columbia Rivers. Constructed between 1911 and 1913 by Northwestern Electric Company, the facility includes a concrete gravity dam, a powerhouse, a wood-stave pipe connecting the dam, a surge tank and two penstocks leading to the powerhouse, and a 1.7-mile (2.7 km) project impoundment, and Northwestern Lake. PacifiCorp Electric Operations (PacifiCorp) acquired the project in 1947.
The White Salmon River originates on the southwestern slope of Mount Adams. The river flows south, draining a basin of approximately 386 square miles (1,004 km 2) before entering Bonneville pool on the Columbia River (NPPC 1990a). Major tributaries upstream of Northwestern Lake include Rattlesnake and Trout Lake creeks. Other tributaries that enter Northwestern Lake include Buck, Mill, and Little Buck creeks. No significant tributaries enter the White Salmon River downstream of Condit dam.
The project is located within portions of four land-use planning jurisdictions: Klickitat County, Skamania County, U.S. Forest Service (USFS), and the Columbia River Gorge Commission. The White Salmon River upstream of Northwestern Lake (RM 5.0 to RM 12.7) is part of the National Wild and Scenic Rivers system. The portion of the river downstream of Northwestern Lake (RM 3.3 to the mouth) is included in the Columbia River Gorge National Scenic Area (CRGNSA).
Decommissioning Management Plans
These plans update the 2004 Project Description and refine PacifiCorp's proposal to remove Condit Dam.
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Project Removal Design Report
Version: January 15, 2010
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Sediment Assessment, Stabilization, and Management Plan
Version: January 8, 2010. Large file 174 MB.
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Erosion Control Plan
Version: January 6, 2010
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Environmental Monitoring Plan
Version: June 8, 2009
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Revegetation and Wetlands Management Plan
Version: January 4, 2010
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Woody Debris Management Plan
Version: May 29, 2009. Large File 177 MB.
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Aquatic Resources Protection Plan
Version: May 29, 2009
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Aquatic Resources Protection Plan Appendix B - Spring Creek National Fish Hatchery Protection Plan
Version: May 29, 2009. File size 6 MB.
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Dust Control Plan
Version: May 27, 2009
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Public Safety and Traffic Control Plan
Version: May 28, 2009
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Quality Control and Inspection Program
Version: May 28, 2009
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Recreation Resources Management Plan
Version: June 3, 2009
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Spill Prevention, Control and Countermeasure Plan
Version: June 8, 2009
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Historic Properties Management Plan
Version: June 11, 2009
Supplemental Environmental Impact Statement
The Final SEIS supplements the following National Environmental Policy Act (NEPA) documents: Condit Hydroelectric Project Final Environmental Impact Statement, FERC No. 2342-005, Washington (Federal Energy Regulatory Commission, October 1996); and Final Supplemental Final Environmental Impact Statement, Condit Hydroelectric Project, Washington, FERC Project No. 2342, (Federal Energy Regulatory Commission, June 2002). As part of the SEIS, Ecology is adopting these documents pursuant to provisions of WAC 197-11-610 and 630.
Noxious Weed Survey and Wetland Inspection Report
The Noxious Weed Survey and Wetland Inspection Report was sent to the State of Washington Department of Ecology and the U.S. Army Corps of Engineers on January 30, 2008.
