Upper Blue Lake Dam Seismic Retrofit Project

3 Documents in Project


SCH Number
Lead Agency
Regional Water Quality Control Board, Region 5 (Central Valley), Sacramento
Document Title
Upper Blue Lake Dam Seismic Retrofit Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Open Space
Document Description
Pacific Gas & Electric Company (PG&E) is proposing to construct the Upper Blue Lake Dam Seismic Retrofit Project at Upper Blue Lake reservoir in Alpine County. A preliminary seismic slope stability evaluation of the dam that was conducted in 2014 indicated that the dam would likely liquefy during an earthquake. The proposed project would improve the seismic stability of the dam by placing a 50-ft wide by 175-ft long rock fill buttress on the upstream side of the Upper Blue Lake dam. The addition of the buttress would require an upstream extension of two low level outlet pipes by approx. 50 ft and reconfiguration of the intake structure and trash rack. The project area consists of the dam retrofit area, bypass piping, staging and parking areas, and spoils placement and storage areas.

Contact Information

Nicholas White
Agency Name
RWQCB, Central Valley
Contact Types
Lead/Public Agency


Cross Streets
Blue Lakes Rd and Forestdale Rd
Total Acres
Parcel #
Upper Blue Lake, Middle Creek, Lower Blue Lake

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
Cal Fire, California Department of Conservation (DOC), California Department of Parks and Recreation, California Department of Transportation, District 10 (DOT), California Energy Commission, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), 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 Quality, California Department of Fish and Wildlife, North Central Region 2 (CDFW)
State Reviewing Agency Comments
California Department of Fish and Wildlife, North Central Region 2 (CDFW)
Development Types
Water Facilities (Type dam)
Local Actions
Dam repair
Project Issues
Air Quality, Biological Resources, Cultural Resources, Drainage/Absorption, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Mineral Resources, Noise, Recreation, Transportation, Vegetation, Wetland/Riparian, Wildfire


Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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