La Sierra Pipeline Project

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La Sierra Pipeline Project Fact Sheet 
La Sierra Pipeline - FAQ


About the Project

Western Municipal Water District is undertaking 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 2.5-miles have been installed.

What's next?
Most of the work on La Sierra Avenue is wrapped up, except for a small crew that is cleaning and testing sections of the pipe to make sure it is ready to be placed in service. Minimal traffic impacts, if any, will result from this work.

The balance of the pipeline is now being installed along the flood control channel. This work will not impact traffic and most people won't even notice it's happening.


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La Sierra Pipeline Public Meeting

Public Meeting Presentation (PowerPoint presented on Mar. 23, 2017)

Check back here for future public meetings.
Contact Info: Lynne Butler, 951.571.7261 or lbutler@wmwd.com

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.
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Traffic Impacts

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.

Construction Hours

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


La Sierra Pipeline in the News

Efforts to increase local water supply should be embraced 

Project Funding

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.
Lynne Butler
More Information

Lynne Butler, Community Affairs Representative II
951.571.7261
lbutler@wmwd.com