Colorado River Aqueduct (CRA), Reservoir and Discharge Line Isolation Gates Project


SCH Number
Public Agency
Metropolitan Water District of Southern California
Document Title
Colorado River Aqueduct (CRA), Reservoir and Discharge Line Isolation Gates Project
Document Type
NOE - Notice of Exemption
Document Description
The Metropolitan Water District of Southern California proposes to add fifteen additional siphon isolation gates to ensure adequate isolation capability on all reaches of the CRA; two reservoir isolation bulkheads for repairs on the CRA upstream of the Gene Wash and Copper Basin reservoirs; four pump discharge line isolation gates for repairs of a pumping plant head gate or discharge line while maintaining partial flow out of adjacent lines; and twenty bypass line gates to isolate individual pump discharge lines. The project also consists of the installation of mounting flanges on the face of the conduit portals leading into the reservoirs to accept the 16-foot diameter reservoir isolation gates; installation of guides and operators, at each pumping plant's surge chamber, to open and close the bypass line isolation gates; and installation of new monorail cranes at the top of the surge chambers to allow installation of a pump discharge isolation gate in either one of these discharge lines.

Contact Information

Michael Melanson
Agency Name
Metropolitan Water District of Southern California
Contact Types
Lead/Public Agency


Riverside, San Bernardino
Other Location Info
Various cities

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Section 15301, 15302
Reasons for Exemption
The proposed project consists of the operation, repair, maintenance, or minor alteration of existing public structures, facilities, mechanical equipment, or topographical features, involving negligible expansion of use beyond that existing at the time of the lead agency's determination. The proposed project also involves the replacement or reconstruction of existing structures and facilities where the new structure will be located within the same area as the structure replaced and will have substantially the same purpose and capacity as the structure replaced.

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 or via phone at (916) 445-0613.

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