Copper Basin Discharge Valve Replacement and Access Road Improvements Project

Summary

SCH Number
2022120316
Lead Agency
Metropolitan Water District of Southern California
Document Title
Copper Basin Discharge Valve Replacement and Access Road Improvements Project
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
Resource Conservation
Document Description
The proposed Project would rehabilitate the slide gate valve and replace the discharge valve within the Copper Basin Dam valve house; install new conduit and electrical components within the valve house; install three new concrete pads and electrical components 250 feet southwest of the Copper Basin Dam; install and anchor-in-place approximately 250 feet of above-ground electrical conduit from the new concrete pads to Copper Basin Dam; replace the ladder on the dam face; install a new catwalk and stairs immediately downstream of and adjacent to the valve house; remove and reconstruct two existing concrete weirs approximately 125 feet downstream of Copper Basin Dam; and install electrical conduit and instrumentation from the two weirs along the catwalk to the valve house. The proposed Project would improve approximately 1.66 miles of the existing dirt access road around the perimeter of Copper Basin Reservoir to facilitate safe access to the base of Copper Basin Dam. Improvements to this existing dirt access road include re-grading the road; paving steep segments of road and installing metal beam guard railing for safety; constructing Arizona crossings at drainage crossing locations; installing v-ditches and riprap outlet structures along the access road to control runoff; and installing vehicle turn out areas and safety signs.

Contact Information

Name
Daniel Cardoza
Agency Name
Metropolitan Water District of Southern California
Job Title
Environmental Specialist
Contact Types
Lead/Public Agency

Location

Cities
Unincorporated area
Counties
San Bernardino
Regions
Southern California
Cross Streets
N/A
Zip
92267
Total Acres
3.91
Parcel #
0661-181-08
State Highways
N/A
Railways
N/A
Airports
N/A
Schools
N/A
Waterways
Copper Basin Reservoir
Township
2N
Range
26E
Section
10-11
Base
Gene Was

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 8 (DOT), California Department of Water Resources (DWR), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Colorado River Basin Region 7 (RWQCB), California State Lands Commission (SLC), Colorado River Board, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance, California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW)
State Reviewing Agency Comments
California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW)
Development Types
Other (Water infrastructure rehabilitation)
Local Actions
Board CEQA adoption
Project Issues
Air Quality, Biological Resources, Cultural Resources, Greenhouse Gas Emissions, Hydrology/Water Quality, Mandatory Findings of Significance, Tribal Cultural Resources, Vegetation, Wetland/Riparian
Local Review Period Start
Local Review Period End

Attachments

Notice of Completion [NOC] Transmittal form
State Comment Letters [Comments from state reviewing agencies]

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