Water Treatment Plant
Membrane Microfiltration Water Treatment Plant
River Diversion Improvements
FACT SHEET:
Membrane Microfiltration Water Treatment Plant
- Single story residential style building, 68 ft. wide, 270 ft. long, 28 ft. tall
- Building sits over a two million gallon “clearwell” substructure
- Initial size sufficient to treat 17 million gallons per day (mgd) with 12 microfiltration units
- Facility sized to ultimately treat 22 mgd, with 16 microfiltration units
American River Diversion System Improvements
- Replaced existing pipelines that connected three Ranney Collectors with 2,200 ft. of 48-inch diameter pipe
- Ranney water now flows by gravity to north side of American River
- Removed above ground portion of Ranney Collectors to improve American River aesthetics
- Removed electrical vault providing power to Ranney 3
- Microtunneled beneath the American River to the microfiltration plant site
Microtunneling
- Three microtunnel drives – longest 970 ft.
- Microtunnel drive beneath the American River – 700 ft.
- Average depth – 45 ft., ranges from 30 ft. below the American River to 90 ft. entering the 100 ft. deep caisson at the water treatment plant
Vertical Caissons/Shafts
- 28 ft. diameter by 60 ft. deep caisson (on south side of American River) near Ranney 2 served as “jacking” shaft for all microtunnel drives
- 20 ft. diameter by 100 ft. deep caisson (on north side of American River) at the membrane filtration plant
- Two 16 ft. diameter by 45 ft. deep temporary receiving shafts to retrieve microtunneling machine
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
Project Cost: $24.13 million
Construction Completion Date: August 2001
Bajamont Water Treatment Plant Expansion Complete
- Bajamont Water Treatment Plant’s current production capacity has increased to 22 million gallons per day.
- Expansion project completed in April 2008. Full production test was completed in May 2008.
- Project included the addition of two new chemical feed systems, an energy efficient compressor and 4 additional microfiltration units.
- The expansion allows the District to use only two groundwater sources during high demand summer months.
- Expansion project was completed on time and within budget.
- Prop 50 grant money totaling $410,000 assisted with construction costs.