Mare Island Strait Outfall Project

6 Documents in Project


SCH Number
Lead Agency
Vallejo Sanitation and Flood Control District
Document Title
Mare Island Strait Outfall Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Public Facilities, Planned Development-Industrial
Document Description
The District proposes to develop and operate a new outfall into Mare Island Strait. The District proposes to reduce energy expenditures and greenhouse gas emissions associated with its existing wastewater treatment plant operations by switching their operations to discharge up to 30 million gallons per day (MGD) of treated effluent into Mare Island Strait on a year-round basis and up to an additional 30 MGD of excess wet-weather flows to the Carquinez Strait. Currently, the Carquinez Strait outfall is used year-round and the existing Mare Island Strait outfall is used for wet-weather flows. The District has estimated that pumping costs would be reduced because it take less electrical power to pump effluent to the Mare Island Strait compared to the Carquinez Strait. District average daily dry weather flows are less than 10 MGD. Energy savings would apply to all dry weather flows and wet weather flows up to 30 MGD. Operations would remain unchanged for wet weather flows exceeding 30 MGD. The project would not increase the discharge quantity or alter the existing treatment process; it is simply a relocation of the point of discharge. The existing outfall to Mare Island Strait would not be removed. Additional project features include installing a pump station and rehabilitating and realigning elements of the existing chlorination and dechlorination system within the wastewater treatment plant site.

Contact Information

Rudolf Ohlemutz
Agency Name
Vallejo Sanitation and Flood Control District
Contact Types
Lead/Public Agency


Cross Streets
Ryder Street, Sonoma Blvd, Solano Ave
Total Acres
Parcel #
State Highways
Hwy 29, 80, 780
Mare Island Strait, Napa River

Notice of Completion

Review Period Start
Review Period End
Development Types
Waste Treatment:Other (Outfall, MGD:30)
Local Actions
BCDC, Grading
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire
Reviewing Agencies
California Department of Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, California Department of Transportation, District 4 (DOT), California Energy Commission, California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), Department of Water Resources, Resources Agency, San Francisco Bay Conservation and Development Commission (BCDC), State Water Resources Control Board, Divison of Financial Assistance, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Reviewing Agency Comments
State Water Resources Control Board, Divison of Financial Assistance, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)

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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