B.F. Sisk Dam Safety of Dams Modification Project

13 Documents in Project


SCH Number
Lead Agency
California Department of Water Resources (DWR)
Document Title
B.F. Sisk Dam Safety of Dams Modification Project
Document Type
SIR - Supplemental EIR
Present Land Use
Exclusive Agriculture, General Agriculture (Merced County)
Document Description
DWR certified an EIS/EIR in 2019, which assessed an approved project that involves making improvements to the downstream side of the existing dam to enhance its stability and increasing the dam crest height to reduce the potential for dam failure from water overtopping the dam if seismic-induced slumping were to occur. Since that time, DWR has identified modifications to the approved project and a Draft SEIR has been prepared to address the environmental effects of these modifications. In summary, these modifications include: • New impact areas associated with development of a new permanent public campground on the northwestern shore of O’Neill Forebay; • Modification to the San Luis Creek Day Use Area at O’Neill Forebay; • Addition of two on-site borrow areas as sources of earth fill material for the dam improvements; • Minor expansion of the contractor work areas that were not evaluated by the 2019 EIS/EIR; and • Modifications to construction assumptions.

Contact Information

Sara Paiva-Lowry
Agency Name
California Department of Water Resources
Contact Types
Lead/Public Agency


Los Banos, Santa Nella
Cross Streets
Basalt Road, Gonzaga Road
Total Acres
State Highways
152, 33
San Luis Reservoir, O’Neill Forebay, San Luis Canal, Delta-Mendota Canal

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 10 (DOT), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Central Valley Fresno Region 5 (RWQCB), California San Joaquin River Conservancy (SJRC), California State Lands Commission (SLC), Central Valley Flood Protection Board, Delta Protection Commission, Delta Stewardship Council, Department of Toxic Substances Control, 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, Central Region 4 (CDFW)
State Reviewing Agency Comments
California Department of Fish and Wildlife, Central Region 4 (CDFW)
Development Types
Recreational (Campground and recreational day use), Water Facilities (Dam safety modifications)(Type N/A, MGD 0.000001)
Local Actions
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire, Forest Land/Fire Hazard; Soil Erosion; Water Supply/Groundwater


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

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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