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Kachess Dam Safety of Dams Modification Project <br />Final Environmental Assessment <br />Proposed action: Reclamation is proposing to reduce the risk of dam failure by performing <br />the following improvements: constructing an access road, preparing the <br />site, developing staging areas to support construction and long-term <br />maintenance, extending and lining the conduit, installing a diaphragm filter <br />around the conduit and a stability berm on top of the filter, and installing <br />an auxiliary drain below the outlet channel. Temporary disturbance during <br />construction would include approximately 11 acres of surface disturbance. <br />Permanent disturbance would include approximately 4 acres of permanent <br />surface disturbance. <br />Lead agency: Bureau of Reclamation, Columbia -Pacific Northwest Region 9, Columbia - <br />Cascades Area Office <br />Responsible official: Area Manager, Bureau of Reclamation, Columbia -Pacific Northwest <br />Region 9, Columbia -Cascades Area Office <br />Coordinating agencies: United States Army Corps of Engineers <br />United States Fish and Wildlife Service <br />Washington Department of Ecology <br />For further information, <br />contact: Candace McI{inley <br />Environmental Program Manager <br />Bureau of Reclamation, Columbia -Cascades Area Office <br />1917 Marsh Rd. <br />Yakima, WA 98901 <br />cmckinley@usbr.gov <br />Kachess Safety of Dams Final Environmental Assessment <br />