The Ross Valley Sanitary District (RVSD) Woodland Area Gravity Sewer Improvement Project (Project) entails the construction and rehabilitation, within the existing alignment, of sanitary sewer mains and related appurtenances within the unincorporated community of Kent Woodlands, within the County of Marin. The Project plans to replace approximately 4,277 linear feet of existing sanitary sewer mains ranging in size from 6-inch (in.) to 8-in. of vitrified clay pipe with 8-in. to 12-in. high-density polyethylene (HDPE) pipe via pipe bursting, open cut, and jack-and-bore or directional drilling methods. In addition, work will be completed in or near Tamalpais Creek to remove the old suspended pipes and to remove existing pipes that are exposed in the Tamalpais Creek channel. The Tamalpais Creek channel will be restored and replaced with constructed riffles. Following the completion of the constructed riffle, the equipment will be removed from the channel bed. The access route will be relandscaped and vegetated, and areas of excavation will be covered with erosion-control fabric. Depths of excavation for Project implementation may range from 5 to 12 ft.
The primary objective of this Project is to relieve hydraulic and structural deficiencies and reduce groundwater infiltration with aging RVSD infrastructure. Construction is expected to begin in spring 2023 and is anticipated to be completed by fall 2023. Work hours will generally be 8:00 a.m. to 5:00 p.m.
Northern California, San Francisco Bay Area, Unincorporated
See NOC Attachment A.
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Department of Water Resources (DWR), 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, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), 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, Divison of Financial Assistance, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
State Reviewing Agency Comments
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Other (sewer rehabilitation )
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Energy, 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, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wildfire
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