Cell D Construction and Landfill Gas System Expansion
Contracting Agency: Asotin County & CH2M Hill
Total Contract: $8,937,568.20
Completion Date: 2013
Cell D construction included 31,000 CY of excavation and 39,400 tons of drain sand over a GCL and HDPE liner system. Also included was the expansion of the landfill gas system, which included HDPE leachate collection and cleanout lines totaling 4,000 LF. Finishing this project was the construction and insulating of five gas monitoring stations. Challenges of this project were subgrade moisture conditioning and compaction, due to dry soil conditions and high testing standards. We worked closely with the owner not to disrupt the day to day operations as the public use roads and landfill operations were in close proximity to the construction site.