Anza Lateral Recycled Water Pipeline, Torrance, CA Phase 1
Customer/Owner Name: U.S. Army Corps of Engineers
Point of Contact: Stan Fujimoto, Contracting Officer
Description: CJW Construction, Inc. furnished and installed 25,000 LF of mainline up to 10-inch diameter pressure waterline with 6-inch and 4-inch C900 PVC laterals, including appurtenances, throughout various arterial streets in Torrance, CA. Pipe works included furnish and install of resilient gate valves, blow-off assemblies, air/vac assemblies, recycled water sampling stations and meters. Minor Concrete, cross-gutter, curb, and sidewalk repairs were kept to a minimum with said work performed in-house. CJW located and potholed hundreds of existing utilities, including high profile gas, oil, electric, fiber optic and sewer lines. All said utilities were protected in place, without damage to any known system. In addition, CJW crossed over or under more than 50 unmarked utilities without incident. The project included 100,000 SF of asphaltic pavement restoration and 700,000 SF of slurry seal, plus electrical loop detector repair and replacement, pavement markings and signage. Deep pipe installation involved dig, lay and backfill through many major, heavy traffic intersections - often threading the 8-inch pipe through multiple conflicting utilities, gas, oil, fiber-optic, sewer, etc.
Other work included deep shored-engineered trenches through type “C” soil, jacking/boring, 1-sack slurry and import sand bedding/backfill. Temporary construction utilized cold-mix asphaltic concrete trench paving or welded steel plates with AC safety wedges. Road reconstruction included aggregate base furnish and place, asphaltic concrete hot mix base and cap course. All shifts required two or more on-site super-ten trucks hauling cut, fill, asphalt, etc., often in and out of heavy traffic.
Challenges: This project required the haul and disposal of hundreds of thousands of tons of material. CJW was able to recycle over 10,000-tons of sand material by screening and re-using a cut volume from a separate project. Blending of the high quality import material also eliminated the need to haul away most of the native cut. This recycling operation eliminated the need to mine virgin aggregate and saved an enormous amount of on-off site trucking and the associated diesel consumption. All existing broken asphaltic concrete and PC concrete was recycled.
Outstanding CCASS Evaluation from Owner
Award Amount: $3,230,700