Nicasio Spillway Modification Project
Summary
SCH Number
2025050077
Lead Agency
Marin Municipal Water District
Document Title
Nicasio Spillway Modification Project
Document Type
NOP - Notice of Preparation of a Draft EIR
Received
Present Land Use
Existing land uses at/in vicinity of project: water storage, agricultural, residential, commercial, public, other uses. General Plan Designations: OS, AG1, AG1 HOD, AG2, AG3, PF-AG1, NC. Zoning: Agricultural Limited, Agricultural Residential Planned, Open Area.
Document Description
Marin Water proposes to modify the existing spillway at Seeger Dam to gain additional storage capacity. Marin Water would install an inflatable rubber gate spanning the width of the existing spillway crest to temporarily increase storage in Nicasio Reservoir for carryover into a potential dry season. Approximately one foot of existing concrete crest structure would be demolished to provide a level surface to install the gate. A small control building would be constructed east of the spillway. The existing backup power system would be upgraded.
Contact Information
Name
Elysha Irish
Agency Name
Marin Municipal Water District
Job Title
Project Manager
Contact Types
Lead/Public Agency / Project Applicant
Phone
Email
Name
Jill Hamilton
Agency Name
Environmental Science Associates
Job Title
Project Manager
Contact Types
Consulting Firm
Phone
Email
Location
Coordinates
Cities
Novato, unincorporated area
Counties
Marin
Regions
Countywide
Cross Streets
Point Reyes-Petaluma Road
Zip
94946
Parcel #
121-230-24
Schools
Nicasio Elementary School
Waterways
Nicasio Creek, Lagunitas Creek
Township
3N
Range
8W
Base
Mount Di
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Coastal Commission (CCC), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Fish and Wildlife, Marin Region 7 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 4 (DOT), California Department of Water Resources (DWR), California Energy Commission, California Fish and Game Commission (CDFGC), California Governor's Office of Emergency Services (OES), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Coastal Conservancy (SCC), California State Lands Commission (SLC), Office of Historic Preservation, San Francisco Bay Conservation and Development Commission (BCDC), 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, University of California Natural Reserve System (UCNRS)
Development Types
Other (Spillway Modification, Reservoir Expansion )
Local Actions
Additional Water Storage
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire, Archeological/Historical, Soil Erosion, Water Quality, Water Supply, Forest Land/Fire Hazard, Toxic/Hazardous, Cumulative, Wildfire
Public Review Period Start
Public Review Period End
Attachments
Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Notice of Completion [NOC] Transmittal form
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