Copper Basin Discharge Valve Replacement and Access Road Improvements Project (Lake or Streambed Alteration Agreement No. EPIMS-SBR-42438-R6)
3 Documents in 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 (Lake or Streambed Alteration Agreement No. EPIMS-SBR-42438-R6)
Document Type
NOD - Notice of Determination
Received
Posted
12/15/2025
Document Description
The California Department of Fish and Wildlife (CDFW) has executed and issued Lake and Streambed Alteration Agreement No. EPIMS-SBR-42438-R6, pursuant to Fish and Game Code section 1602, to the project Applicant, The Metropolitan Water District of Southern California.
The Project proposes to 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. Additionally, the Project will rehabilitate 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.
Contact Information
Name
Alex Marks
Agency Name
The Metropolitan Water District of Southern California
Job Title
Senior Environmental Specialist
Contact Types
Lead/Public Agency
Phone
Email
Name
Edith Martinez
Agency Name
Fish and Wildlife, Region 6
Job Title
Senior Environmental Scientist (Specialist)
Contact Types
Responsible Agency
Phone
Location
Coordinates
Counties
San Bernardino
Regions
Southern California
Other Location Info
Located at Copper Basin Reservoir, which lies approximately 5 miles west of Parker Dam and the border between California and Arizona.
Notice of Determination
Approving Agency
Fish and Wildlife, Region 6
Approving Agency Role
Responsible Agency
Approved On
County Clerk
San Bernardino
Final Environmental Document Available at
The Metropolitan Water District of Southern California
700 North Alameda Street
Los Angeles, CA 90012
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
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