La Sierra Pipeline Project

La Sierra 201609 0053a

La Sierra Pipeline Project Fact Sheet

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 Project is a nearly $36 million project to provide locally sourced, drought-proof drinking water to our region.

The project will begin in Spring 2017 and will take approximately 18-months to complete. 

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La Sierra Pipeline Public Meeting

Thursday, March 23 at 6-7 pm
Arizona Middle School, 11045 Arizona Avenue, Riverside

Contact Info: Lynne Butler, 951.571.7261 or

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.

La Sierra Alignment 201702 
La Sierra Pipeline Alignment


Traffic Impacts

There will be some traffic interruptions on La Sierra Avenue during the construction period, and all motorists should use an alternate route if possible.

If that isn’t feasible, motorists should obey all traffic control measures in the construction zone between El Sobrante Road to just north of Arizona Avenue.

Work planned in front of Arizona Middle School is scheduled to take place in the summer when school is out of session.

Project Funding

This project is funded by a Federal Bureau of Reclamation Grant and Western’s water reliability fund earmarked in Western’s existing rates. Financing is by the State of California Revolving Fund Loan program. This project does not come out of the water rates our customers pay to Western.
Lynne Butler
More Information

Lynne Butler, Community Affairs Specialist