The Headquarters Landfill, purchased from Weyerhaeuser in 2014, is the primary disposal location for the entire county. Commercial and residential self-haul waste currently goes to the Transfer Station for consolidation prior to disposal at the Headquarters Landfill. The facility is located in eastern Cowlitz County, approximately 7 miles east of I-5 and 2.5 miles southeast of Silver Lake. The permitted landfill footprint is 308 acres, 49 acres of which Weyerhaeuser has developed since 1993 and the County has developed since 2014.
Tennant Way Landfill
The 100-acre landfill was purchased by the County in 1984 and was closed in 2014. The landfill is estimated to contain approximately 2.4 million cubic yards of solid waste underlying the cover soil. The facility is monitored under permit during postclosure consistent with WAC-173-304. The facility has in place a leachate-collection system as well as a system that controls landfill-gas migration and odors.
For more information on the landfills see the Solid Waste Management Plan 2021 which is currently under review. (see sections 1.5.4, and 7.3.1, and 10.3.1)
Interested in project details for the purchase of the Headquarters Landfill, such as where the leachate line may go and costs? View this presentation (PDF), given at the Toutle Grange on August 27, 2013.
Headquarters Landfill Project Plan of Operation and Appendixes. Please note that some of these files are very large and may require additional time to download. Adobe Reader 7 or higher required.
Headquarters Landfill Final Environmental Impact Statement (PDF) - Updated July 2013
Plan of Operation (PDF) - Updated November 2013
Hydrogeologic Report (PDF) - Updated June 2013
Appendixes A and B (PDF) - Updated June 2013
Appendix A (PDF) - Updated November 2013
Appendixes C and D (PDF) - Update June 2013
Appendixes E, F and G (PDF) - Updated June 2013
Appendixes H and I (PDF) - Updated June 2013
Appendix L (PDF) - Updated November 2013