WCL 2024 Leachate Pond - Plans.pdf

These are the construction plans for the West Central Landfill Leachate Pond project, prepared by the State of California, County of Shasta Department of Public Works, with Contract No. 20764. The project involves constructing a new leachate pond and leak detection system at the West Central Landfill in Shasta County, California. The plans detail the site layout, leachate and leak detection line configurations, typical sections, and construction details. The project scope includes clearing and grubbing, earthwork (with 15,697 cubic yards of raw cut and 863 cubic yards of raw fill), installing underground piping, constructing clay and geomembrane liners, creating anchor and floor liner sections, and establishing various pond areas including a clay liner staging area, construction water source, closed and active disposal areas, and staging ponds.

The project requires a contractor to possess either a Class "A" license or an appropriate combination of license classifications. The detailed plans specify technical requirements for pond slopes, liner systems, and drainage infrastructure. The design includes multiple pond sections with specific elevation and slope specifications, leak detection systems, and connection points. The geomembrane liner system consists of a primary 60 mil HDPE geomembrane, a 300 mil geonet, and a secondary 60 mil HDPE geomembrane, with clay liner components. The plans provide comprehensive technical specifications for each construction phase, including trench details, pipe installations, valve placements, and monitoring infrastructure, ensuring a comprehensive approach to leachate management and environmental protection.