Colorado River Aqueduct Conveyance Reliability Program - Dam Sluiceways and Outlets Rehabilitation Preliminary Design


SCH Number
Public Agency
Metropolitan Water District of Southern California
Document Title
Colorado River Aqueduct Conveyance Reliability Program - Dam Sluiceways and Outlets Rehabilitation Preliminary Design
Document Type
NOE - Notice of Exemption
Document Description
The Metropolitan assessed the reliability of the dam sluiceways at Gene Wash and Copper Basin reservoirs, and the outlet facilities at Copper Basin reservoir. The slide gates at both reservoir sluiceways show signs of corrosion and need to be repaired and recoated. The valves, actuators, and electrical systems show signs of excessive wear due to age and use, and also require repair. Other recommended improvements include installation of a stationary two-ton crane, work platforms and stairwells at each dam to facilitate maintenance and to improve workplace safety. The Copper Basin reservoir outlet includes refurbishment of mechanical operators and guides; replacement of electrical transformers; upgrades of the communication links from the dam and outlet gates to Gene Camp; upgrades to personnel fall-prevention equipment; and upgrade of the control structure. In addition, rock cuts adjacent to the control structure have shown signs of erosion and instability, and slope stabilization is recommended to ensure uninterrupted access to the structure. Metropolitan proposes to prepare preliminary design of repairs and improvements.

Contact Information

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


San Bernardino
Other Location Info
City/Community: Parker

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Section 15306
Reasons for Exemption
The proposed project consists of basic data collection and resource evaluation activities, which do not result in a serious or major disturbance to an environmental resource. This may be strictly for information gathering purposes, or as part of a study leading to an action, which a public agency has not yet approved, adopted, or funded.

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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