Water Recycling Program – Phase 2
42-Inch Recycled Water Transmission
Main Middle Segment
The 42-Inch Recycled Water Transmission Main – Middle Segment consisted of approximately 12,247 lineal feet of 42″ diameter recycled water transmission main and appurtenances, including 50 lineal feet of 60-inch jacked steel casing, blow-off valves and piping, 36″ butterfly valves and vaults, and the installation of magnesium and zinc ribbon anodes for cathodic protection. The majority of the pipeline was installed utilizing open-cut installation techniques working around and protecting numerous utility crossings; both those anticipated by the Contract Documents as well as many which were not.
The routing of the pipeline owned by the West Basin Municipal Water District was subdivided into five (5) separate contracts. The schedule called for each segment to complete simultaneously to make the line available for use on the earliest possible date. The Middle Segment which J.R. Pipeline Co. was contracted to construct was designed in several major thoroughfares beginning in the City of Carson and continuing into the City of Los Angeles. The first 2,664 lineal feet were installed in Broadway Street, the next 886 lineal feet were built in Victoria Street, the next 6,173 lineal feet were laid in Figueroa Street, and the final 2,524 lineal feet were constructed in 168th Street.
The installation of the pipe occurred at a highly accelerated rate despite the fact that the contractual project duration was in excess of seven (7) months. This due to the fact that the manufacture of the first pieces of pipe required nearly four (4) months to complete. As a result, it was necessary for J.R. Pipeline to install in excess of 300 lineal feet per day to achieve a timely substantial completion.
DACM Project Management was under contract with J.R. Pipeline Co., Inc., a general engineering contractor. We provided construction management services including advising the client on day-today construction issues, analyzing contractual and legal issues, preparing and negotiating change orders, preparing Requests For Information (RFIs), preparing pay applications, authoring correspondence on behalf of the Contractor, developing the baseline schedule, and preparing schedule impact analyses to justify time extensions. Our efforts also focused on developing documentation for and preparing back charges to vendors who did not provide materials when and as required by contract.
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