Western Municipal Water District has been working on an ambitious capital improvement project to provide safe and reliable water for all its customers.
The La Sierra Pipeline is a nearly $36 million project to provide locally sourced,
drought-proof drinking water to our region.
Since June 2017, construction crews have been working on La Sierra Avenue to install a 30-inch pipeline that will connect
the Arlington and Chino Desalters to the Sterling Reservoir.
Approximately 5 miles of pipe is needed to move the water for this project. So far, about 4 miles have been installed along
La Sierra Avenue.
What's next? Crews are continuing to work on La Sierra Avenue to connect the pipeline to the tank at El Sobrante. Once the connection is completed crews will begin pressure testing and the move forward to the paving portion of the project.
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How It Will Work
An expansion of the Chino Desalter will increase new water production by 3,500 acre-feet per year. Production capacity at the Arlington Desalter will also be expanded thanks to a new 5,400 horse power pump station.
Then, five miles of 30-inch pipe will be placed underground along La Sierra Avenue to connect the two desalter facilities to the La Sierra Tank. This connection will facilitate the delivery of the new water supply to more than 80,000 customers in Western’s Riverside retail service area.
Most of the construction work is now taking place along the Arlington Channel and out of the public right-of-way.
A small construction crew will continue work on La Sierra Avenue to test the pipeline in small sections to ensure it is ready to be put into service.
Some nighttime work will take place in the cul-de-sac of Sterling Avenue in Riverside through mid-May. Work will take place from 6 p.m. to 4 a.m. and measures will be put in place to reduce noise from this work.
Western is limiting construction hours to avoid noise during early morning and late-night hours. Generally speaking, construction will take place between 7 a.m. and 4 p.m., with some exceptions. Detail construction hours are:
Indiana Ave: 7 a.m. to 3 p.m. on Saturday and Sundays only
The La Sierra Pipeline project is not expected to increase the rates charged to customers. The Project will provide high quality source of water that is locally developed rather than imported from Northern California, thereby increasing the District’s water supply reliably to our customers. The project is funded by a Federal Bureau of Reclamation Grant and by Western’s Water Reliability Fund, which is earmarked in Western’s existing rate schedule. Financing is provided by the State of CA’s Revolving Fund Loan program.