Wastewater Treatment Plant and Constructed Wetlands Project

3 Documents in Project


SCH Number
Lead Agency
Rio Alto Water District
Document Title
Wastewater Treatment Plant and Constructed Wetlands Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
PLU: Undeveloped lands Z: Natural, residential, Floodplain GPD: Habitat resources and Residential

Document Description
The proposed on-site treatment plant improvements include: the addition of an improved screening unit at the headworks, construction of a biological selector, optimization of the existing secondary clarifier, construction of another secondary clarifier, conversion of the existing return activated sludge (RAS) pump station to an aerobic digester, construction of a new RAS pump station, and improvements to an existing pump station to convey flows to the constructed wetlands area. The proposed off-site improvements include: installation of +/- 12,00 lineal feet of underground reclaimed-water pipeline within existing roadways and across undeveloped parcels, and construction of a +/- 77-acre wetland area to allow for the biological uptake of nutrients and percolation if reclaimed water.

Contact Information
Martha Slack
Rio Alto Water District
22099 River View Drive
Cottonwood, CA 96022

Phone : (530) 347-3835


40°20'42.4"N 122°12'22.1"W
Cross Streets
Rio Alto & Edgewater Drives
Total Acres
+/- 80
Lake CA Private Airstrip
Sacramento River
Other Location Info
City/Nearest Community: Lake California

Notice of Completion

Review Period Start
Review Period End
Development Type
Waste Treatment:Other (Wastewater MGD: 1.0)
Local Action
Other Action Other Action: Project Approval
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Sewer Capacity Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects Other Other Issues: GHG
Reviewing Agencies
California Department of Fish and Wildlife, Northern Region 1 California Department of Parks and Recreation California Department of Public Health California Native American Heritage Commission Caltrans, Division of Aeronautics Department of Water Resources Office of Historic Preservation Resources Agency State Water Resources Control Board, Divison of Financial Assistance California Department of Transportation, District 2 Central Valley Flood Protection Board California Regional Water Quality Control Board, Central Valley Redding Region 5

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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