2023-2024 Sites Reservoir Test Pits, Fault Studies and Quarry Studies


SCH Number
Lead Agency
Site Project Authority (SPA)
Document Title
2023-2024 Sites Reservoir Test Pits, Fault Studies and Quarry Studies
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Agriculture, Rural Residences/Businesses
Document Description
The Sites Project Authority is proposing to conduct field investigations (“investigations”) using test pit and trench excavations in Colusa, Glenn, and Yolo Counties. The purpose of these investigations is to obtain information necessary to support the ongoing engineering evaluations and design development for the proposed Sites Reservoir and associated facilities. The Proposed Project would be implemented in and near the Antelope Valley in Colusa and Glenn Counties where the dams, reservoirs, pipelines, and related facilities could be located for the proposed Sites Reservoir, along with areas near the town of Dunnigan in Yolo County where pipelines and related facilities could be located for the proposed Sites Reservoir. The Proposed Project includes up to 84 test pits and trenches for 11 fault studies and 7 quarry studies. Test pits would provide information regarding the quantity and quality of borrow materials at proposed quarry locations, as well as information regarding pipeline trench stability; fault studies would provide information in areas of suspected and known fault traces/zones; and quarry studies would provide information on quantity and quality of borrow materials.

Contact Information

Alicia Forsythe
Agency Name
Sites Project Authority
Job Title
Environmental Planning and Permitting Manager
Contact Types
Lead/Public Agency


Sites, Maxwell, Dunnigan
Colusa, Glenn, Yolo
Cross Streets
Maxwell Sites Road and Sites Lodoga Rd.
Parcel #
State Highways
Interstate 5
Union Pacific Railroad
GCID Main Canal, Tehama Colusa Canal, Funks Reservoir, Funks Creek, Hunters Creek

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 Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Resources Recycling and Recovery, California Department of Transportation, District 3 (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 Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), 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
Development Types
Other (Subsurface Investigations)
Local Actions
Subsurface Investigations
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire
Local Review Period Start
Local Review Period End


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Notice of Completion [NOC] Transmittal form

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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