Clark, Cowlitz, SW Lewis Geographic Response Plan (CCSWL-GRP)

Toutle River

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)

Interim Updates

In between plan updates, GRP strategies are tested during drills and actual spill events. The results of these tests may require changes to certain response strategies, notification strategies, staging areas, or boat launch locations. Eventually, these changes will be fully incorporated into the plan. Until that time, please use the updated strategy and information sheets below in lieu of that provided for similarly numbered locations in the published plan.

No interim updates currently available

View the CCSWL Response To Comments Received Through June 18, 2015

How to Comment

If you have any questions, suggestions for improvement, or find errors in this document, submit comments online at, email to Ecology at, or forward your comments via U.S. Mail to the following agencies:

U.S. Environmental Protection Agency
Region 10
Office of Environmental Cleanup
1200 Sixth Avenue
Room ECL-116
Seattle, WA 98101

Washington State Department of Ecology
Spill Prevention, Preparedness, and Response (GRPs)
P.O. ox 47600
Olympia, WA 98504-7600