Zone A to Rattlesnake Reservoir Pump Station Project


SCH Number
Lead Agency
Irvine Ranch Water District
Document Title
Zone A to Rattlesnake Reservoir Pump Station Project
Document Type
MND - Mitigated Negative Declaration
Project Applicant
Irvine Ranch Water District
Present Land Use
The Rattlesnake Complex is currently zoned 6.1/Institutional with a land use designation of Public Facilities.

Document Description
IRWD proposes to replace the existing Rattlesnake Reservoir Pump Station No. 2 (RRPS2) with a new Zone A to Rattlesnake Reservoir Pump Station (ZARRPS) at the Rattlesnake Reservoir Complex. The proposed project includes demolition and replacement of the existing RRPS2 with the ZARRPS equipped with all electric motor-driven pumps to meet current capacity demand and future Michelson Water Recycling Plant (MWRP) production including all associated pipelines and appurtenances; demolition of the Northwood Zone A to B pump station; demolition of the existing septic system and extension of the existing sewer piping to connect to the existing caretaker's house, the park bathroom sewer lateral, and a new bathroom to be located within the existing chlorination facility to the existing sewer system near the site; demolition and removal of above and below-grade abandoned facilities within the Complex; demolition and replacement of the existing dechlorination storage and feed equipment; construction of a new filtration system intended for increased algae control, demolition and removal of the existing Hell an strainers, demolition and removal of the existing Rattlesnake Reservoir return pump station, construction of the new Rattlesnake Reservoir return pump station, construction of new automatic filters and backwash pumps in an enclosed building, piping improvements and appurtenances, and electrical improvements; installation of a permanent standby power generator; new site electrical service and undergrounding of a portion of the overhead electrical and communication cables; replacement and/or upgrades to the Complex's communications equipment; improvements to the site entry road and general site facilities, including pavement, curb and gutter, and drainage facilities.

Contact Information
Jo Ann Corey
Irvine Ranch Water District
15600 Sand Canyon Avenue
Irvine, CA 92618

Phone : (949) 453-5300


33°43'37"N 117°44'44"W
Cross Streets
Portola Parkway and Orchard Hills
Total Acres
State Highways
John Wayne Airport
Northwood High School
Irvine Lake
El Toro

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (Pump Station Type, 32.4 MGD)
Local Action
Site Plan
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Greenhouse Gas Emissions Minerals Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Septic System Sewer Capacity Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Tribal Cultural Resources Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
California Air Resources Board California Department of Fish and Wildlife, South Coast Region 5 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Transportation, District 12 California Department of Transportation, Division of Aeronautics California Energy Commission California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Public Utilities Commission California Regional Water Quality Control Board, Santa Ana Region 8 Department of Toxic Substances Control State Water Resources Control Board, Division of Drinking Water California Department of Water Resources


Environmental Document
NOI   PDF 810 K Summary Form   PDF 111 K Zone A to Rattlesnake Reservoir_MND - January 2020   PDF 17512 K
NOC   PDF 1450 K
State Comments
DSOD Comment_SCH2020019012_2   PDF 120 K

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