The Clark, Cowlitz, Southwest Lewis GRP planning area fully resides within Clark, Cowlitz, and Lewis counties. It includes over 13 miles of the Coweeman River, 51 miles of the Cowlitz River, 12 miles of the Kalama River, 17 miles of the Lewis River (including 16 miles of the East Fork), 2.6 miles of the Little Kalama River, and more than 8 miles of the Toutle River. Fully or partially, the cities of Castle Rock, Kalama, Kelso, Longview, Ridgefield, Vancouver, Winlock, and Woodland fall within the boundaries of this plan. The planning area also includes portions of Water Resource Inventory Area 23 (WRIA-23, Upper Chehalis), WRIA 25 (Grays/Elochoman), WRIA 26 (Cowlitz), WRIA 27 (Lewis), and WRIA 28 (Salmon-Washougal). The Clark, Cowlitz, and SW Lewis GRP planning area is bordered by the Chehalis GRP to the north and the Lower Columbia River GRP to the south and southwest.
View the Clark, Cowlitz, SW Lewis GRP (October 2015) (PDF 30 MB)
No interim updates currently available
View the CCSWL Response To Comments Received Through June 18, 2015
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U.S. Environmental Protection Agency