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Water Treatment Plant
- Membrane Microfiltration Water Treatment Plant
- American River Diversion System Improvements
- Micro Tunneling
- Vertical Caissons/Shafts
- Membrane Filters
Membrane Microfiltration Water Treatment Plant
- Single-story residential style building, 68 feet wide, 270 feet long, 28 feet tall
- The building sits over a two million gallon "Clearwell" substructure
- Facility sized to treat 22 mgd, with 16 microfiltration units
View the Membrane Microfiltration Water Treatment Plant gallery.
American River Diversion System Improvements
- Replaced existing pipelines that connected three Ranney Collectors with 2,200 feet of 48-inch diameter pipe
- Water now flows by gravity to the north side of the American River
- Removed above-ground portion of Ranney Collectors to improve American River aesthetics
- Removed electrical vault providing power to 3 Ranney Collectors
- Microtunneled beneath the American River to the microfiltration plant site
View the American River Diversion System Improvements gallery.
Micro Tunneling
- Three micro tunnel drives - longest 970 feet
- Micro tunnel drive beneath the American River - 700 feet
- Average depth - 45 feet, ranges from 30 feet below the American River to 90 feet entering the 100 feet deep caisson at the water treatment plant
View the micro tunneling gallery.
Vertical Caisson/Shafts
- 28 feet diameter by 60 feet deep caisson (on the south side of the American River) near Ranney 2 served as a "jacking" shaft for all micro tunnel drives
- 20 feet diameter by 100 feet deep caisson (on the north side of the American River) at the membrane filtration plant
- Two 16 feet diameter by 45 feet deep temporary receiving shafts to retrieve micro tunneling machine
View the Vertical Caissons/Shafts gallery.
Membrane Filters
- 12 primary membrane skids - 1.8 million hollow fibers per skid
- 2 solid membrane skids - 960,000 hollow fibers per skid
- 2 tertiary membrane skids - 120,000 hollow fibers per skid
- These membrane filters remove particulates 0.2 microns or larger
View the Membrane Filters gallery.
Project Cost
- $24.13 million
Construction Completion Date
- August 2001