Matilija Dam Ecosystem Restoration Project Subsequent Environmental Impact Report

16 Documents in Project


SCH Number
Lead Agency
Ventura County Watershed Protection District
Document Title
Matilija Dam Ecosystem Restoration Project Subsequent Environmental Impact Report
Document Type
NOP - Notice of Preparation of a Draft EIR
Present Land Use
Ventura County land use and zoning designation for areas surrounding dam is Open Space
Document Description
In October 2000, VCPWA – WP, then the Ventura County Flood Control District, initiated the Matilija Dam Ecosystem Restoration Study as a joint effort between Watershed Protection and U.S. Army Corps of Engineers to develop a project resulting in the removal of Matilija Dam. The primary Project objectives included: aquatic and terrestrial habitat improvement, facilitating the return of a viable and abundant run of steelhead trout; and restoration of natural sediment transport processes along Matilija Creek and the Ventura River. The secondary objective was enhancement of recreational opportunities along these two waterways. The joint Environmental Impact Statement/Environmental Impact Report (EIS/EIR) certified in 2004 evaluated alternatives combining dam removal, sediment relocation, flood protection (levees), two bridge replacements, new recreation features, giant reed removal, and water supply improvements. Technical studies to refine project features continued between 2008 and 2016, resulting in a new dam removal method and reevaluation of other project components. In June 2017, VCPWA – WP received funding to implement the Matilija Dam Removal 65% Design Planning Project, comprising additional technical studies, construction design, and CEQA analyses. The VCPWA – WP has determined that preparation of a Subsequent EIR is warranted to provide a complete and objective analysis of the revised Matilija Dam removal approach. Dam removal would be accomplished by creating two 12-foot diameter orifices drilled near the dam base which would be opened in advance of a large storm event. Storm flows would then be expected to transport primarily fine-grained reservoir deposits from behind the dam downstream to Matilija Creek, the Ventura River and Pacific Ocean. After an adequate amount of sediment is flushed from behind the dam, physical dam removal would be conducted. Habitat restoration would be accomplished by managed natural recruitment and non-native plant control. Adaptive management would monitor and correct post dam removal river flow obstructions to fish passage.

Contact Information

Donna Hebert
Agency Name
Ventura County Public Works Agency – Watershed Protection
Job Title
Environmental Planner
Contact Types
Lead/Public Agency


Southern California, Unincorporated
Cross Streets
North End: SR-33 and S. Matilija Hot Springs Rd. South End: Pacific Ocean
State Highways
None within 2 miles
Ojai Unified School District
Matilija Creek, Ventura River

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Resources Recycling and Recovery, California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Natural Resources Agency, California Regional Water Quality Control Board, Los Angeles Region 4 (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, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance, California Native American Heritage Commission (NAHC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Transportation, District 7 (DOT)
State Reviewing Agency Comments
California Native American Heritage Commission (NAHC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Transportation, District 7 (DOT)
Development Types
Other (Dam removal/ecosystem restoration)
Local Actions
65%Design Plan Approval
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Coastal Zone, 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, Mandatory Findings of Significance, 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
Local Review Period Start
Local Review Period End


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Notice of Completion [NOC] Transmittal form

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, 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. For more information, please visit OPR’s Accessibility Site.

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