Yucaipa Valley Regional Water Filtration Facility
Located about 75 miles east of Los Angeles, the Yucaipa Valley is surrounded by the foothills of the San Bernardino Mountains and the San Bernardino National Forest. The natural beauty and proximity to Interstate 10 serves as a magnet for growth, which increases demand for municipal services such as clean drinking water.
The Yucaipa Valley Water District (YVWD) serves the cities of Yucaipa and Calimesa as well as portions of Riverside and San Bernardino counties. To meet increasing water needs, the YVWD hired HDR to provide design, construction engineering, bidding assistance and startup services for a new $37 million regional water filtration facility.
This new plant will use microfiltration technology with nanofiltration equipment for TOC removal. Designed for an initial capacity of 12 million gallons-per-day (mgd), the design allows for expansion to 36 mgd on the 32-acre site.
The project design included:
- Microfiltration using Pall membranes
- Nanofiltration and blending facilities
- Residuals handling facilities using dissolved air flotation
- Disinfection using sodium hypochlorite
- A six-million gallon finished water storage tank
- An influent control system
- A finished water pipeline to convey treated water to the distribution system
Additional features include slope protection for the adjacent flood control channel and security enhancements.
YVWD selected the Pall microfiltration membranes based on their performance during pilot testing, as well as cost and their ability to take advantage of the existing gravity head. The nanofiltration membranes were installed downstream to remove disinfection by-product precursors while limiting total dissolved solids (TDS) rejection. HDR was the lead designer for the project and SPI, Inc., was responsible for membrane systems process design.
The microfilter backwash is treated and returned to the non-potable water system for the YVWD while the nanofiltration concentrate will be disposed of into the regional sewer system.