Twitchell Dam Dredging Project


SCH Number
Lead Agency
Santa Maria Valley Water Conservation District
Document Title
Twitchell Dam Dredging Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
AG, Agriculture, AG-II-100
Document Description
The purpose of this project is the removal of sediment that has accumulated and may affect the function of the lower inlet portal of the Twitchell Dam Inlet Structure. This is emerging as an essential sediment management capital project requirement to maintain the outlet works in good condition. It is proposed to perform this work utilizing a floating hydraulic dredge as described in this project description.

Contact Information

Daryl Souza
Agency Name
Santa Maria Valley Water Conservation District
Contact Types
Lead/Public Agency


Santa Maria
San Luis Obispo, Santa Barbara
Cross Streets
Private access drive off of Highway 166
Parcel #
090-411-020 & 131-005-013
State Highways
Hwy 166

Notice of Completion

Review Period Start
Review Period End
Development Types
Other (Dredging Operations, 9,000 cy of material stockpiled in a 9 ac b)
Project Issues
Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Drainage/Absorption, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Wildlife
Reviewing Agencies
California Coastal Commission (CCC), California Department of Fish and Wildlife, Central Region 4 (CDFW), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Public Health (CDPH), 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), California State Lands Commission (SLC), Department of Water Resources, Resources Agency, State Water Resources Control Board, Division of Water Rights

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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