Unit 2 Phase 5-2 Liner Construction Project at the San Timoteo Sanitary Landfill

The County of San Bernardino is soliciting bids for the design‑build of Unit 2 Phase 5‑2 liner construction at the San Timoteo Sanitary Landfill in Redlands, CA. The scope includes major earth‑moving, installation of a composite liner system (geosynthetic clay liner and HDPE geomembrane), construction of leachate collection and removal infrastructure, roadway and fence upgrades, landfill‑gas piping, and associated civil, structural, mechanical, and electrical works. The project requires a mandatory pre‑bid meeting and site walk, full compliance with California prevailing‑wage and apprenticeship rules, and a minimum 50 % self‑performance effort. The contract is a large public‑works effort anticipated to run for roughly 350 working days. • Composite liner installation (GCL & HDPE) with low‑permeability and operation layers. • Extensive civil works: access/entrance road grading, paving, curb, drainage, and fence improvements. • Mechanical/electrical systems: new leachate tanks, pumps, control panels, and landfill‑gas infrastructure. • Mandatory paleontological monitoring and full‑time site supervision. • Requires Class “A” contractor license, CARB certification, and substantial insurance/bonding.