Mono Gate One Diversion Facility Upgrade Project

2 Documents in Project


SCH Number
Lead Agency
Los Angeles County
Document Title
Mono Gate One Diversion Facility Upgrade Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Resource Management General Plan Designation
Document Description
The proposed Mono Gate One Facility Upgrade Project consists of (1) construction of an approximately 150-foot bypass pipeline and valve installed to ensure that flows to Lower Rush Creek will not be interrupted. This pipeline will eventually be maintained as a bypass pipeline. (2) Improvements to the Mono Gate structure, installation of equipment (for flow control and monitoring telemetry), and a new measuring station in Rush Creek Return Ditch downstream of the bypass pipeline, and (3) either a new 12 kilovolt overhead power line from the Grant Reservoir shaft house to Mono Gate One along the existing road or a solar power array at the Mono Gate One facility to power operations. The completion of the project will (1) improve the structural integrity of the Mono Gate One Diversion facility; (2) allow for better flow control and measurements from the Grant Reservoir to Lower Rush Creek and Mono Craters Tunnel; and (3) allow for better communications, flow monitoring and flow control between the Mono Gate One facility and LADWP's Bishop facilities.

Contact Information

Sarah Easley Perez
Agency Name
Los Angeles County Dept of Water and Power
Contact Types
Lead/Public Agency


Cross Streets
State Highway 395, West Portal Road
State Highways
Grant Reservoir
Other Location Info
City/Nearest Community: Lee Vinning

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 9 (DOT), California Highway Patrol, California State Lands Commission (SLC), Department of Toxic Substances Control, Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Division of Water Rights, California Regional Water Quality Control Board, Lahontan Victorville Region 6 (RWQCB), California Native American Heritage Commission (NAHC)
State Reviewing Agency Comments
California Regional Water Quality Control Board, Lahontan Victorville Region 6 (RWQCB), California Native American Heritage Commission (NAHC)
Development Types
Water Facilities (gate improvements)(Type bypass pipeline,), Power:Other Power Type (4,100' of 12kV line or solar panels)(Megawatts 12 kV)
Local Actions
Existing Facility Upgrade
Project Issues
Aesthetics, Air Quality, Biological Resources, Cultural Resources, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Recreation, Transportation, Vegetation, Wetland/Riparian

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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