Spills photo identifier

Spills Program

Chehalis River Geographic Response Plan (CHER-GRP)

Chehalis River 

The Chehalis River GRP planning area covers the river from Cosmopolis, picking up where the Grays Harbor GRP ends, follows the river southeast to Chehalis, and then west to Pe Ell. The Chehalis River GRP has four distinct areas: (1) the tidally influenced area between Montesano and the mouth, (2) the middle section of river between Montesano and the mouth of the Skookumchuck River in Centralia, (3) the Chehalis Reach between the Skookumchuck and Newaukum Rivers, and (4) the upper section of river between the Newaukum River and Pe Ell. The communities of Cosmopolis, Central Park, Montesano, Satsop, Fuller, Elma, Malone, Porter, Oakville, Rochester, Grand Mound, Littlerock, Maytown, Tenino, Fords Prairie, Centralia, Chehalis, Adna, Curtis, Doty and Pe Ell are included in this area.

View the Chehalis River GRP (October 2015) (PDF 18.4 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 CHER Response To Comments Received Through May 8, 2015



How to Comment

If you have any questions or comments, suggestions for improvement, or find errors in this document please submit comments online at
http://www.rrt10nwac.com/Comment, email them to us at GRPs@ecy.wa.gov, or forward them via U.S. Mail to the following agencies:

United States 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. Box 47600
Olympia, WA 98504-7600