Main Street Subwatershed Improvement


SCH Number
Lead Agency
City of Santa Maria
Document Title
Main Street Subwatershed Improvement
Document Type
MND - Mitigated Negative Declaration
Present Land Use
community facilities, AS-II, PF, C-S
Document Description
The project will treat approx 100 MG by diverting agricultural effluent and flow from the city's West Main St storm drain, where the water is processed in a new wood-chip bioreactor for denitrification and eventual groundwater recharge. The project repurposes 1.85 miles of existing, abandoned sewer pipeline and creates a diversion structure associate pipeline connections culminating at a 1.2 acre wood-chip bioreactor along the northeast portion of the Wastewater Treatment Plant. The project involves removing asphalt from West Main St to adjust manholes over the existing sewer main to the finished surface. Up to nine new bypass access manholes may be installed along the southern side of the eastbound travel lane at a depth of 12 ft.

Contact Information

Ivana Yeung
Agency Name
City of Santa Maria
Contact Types
Lead/Public Agency


Santa Maria
Santa Barbara
Cross Streets
West Main St (SR-166); Black Rd
Total Acres
Parcel #
State Highways
SR 166
Santa Maria Valley
Bonita ES
Main St Canal

Notice of Completion

Review Period Start
Review Period End
Development Types
Water Facilities (Type sewer main, MGD 273,970)
Local Actions
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Sewer Capacity, Transportation
Reviewing Agencies
Air Resources Board, Transportation Projects, California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 5 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, Central Coast Region 3 (RWQCB), Department of Water Resources, Resources Agency, State Water Resources Control Board, Division of Water Quality

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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