Smith Basin Improvement Project

2 Documents in Project


SCH Number
Lead Agency
Orange County Water District
Document Title
Smith Basin Improvement Project
Document Type
MND - Mitigated Negative Declaration
Project Applicant
Orange County Water District
Present Land Use
Open Space and Water Uses

Document Description
The proposed project under the previous scoping (June 2018 NOP Proposed Project) involved two (2) project alternatives. Alternative 1 involved improvement to increase geotechnical stability of the Smith Basin embankment slopes in six (6) areas. Under Alternative 2, all improvements under Alternative I would be included, except that under Alternative 2, Santiago Creek would be reestablished along the toe of the slopes in its current alignment and would maintain its current width and depth and would be protected in place with rip rap. In August 2018, the OCWD reevaluated the NOP Proposed Project and began the revision process to the scope of work. Limits were placed on the proposed improvements, reducing the number of areas proposed for stabilization from six (6) to three (3) and realigning the Santiago Creek to its prior alignment instead of stabilizing it in its current location. The Proposed Project activities includes re-establishing the historical access road on the north; re-grading the bottom of Smith Basin to restore Santiago Creek in its former alignment nearer the middle of the basin; repairing and reconstructing the slopes in the basin; constructing six (6) groins to slow water flow along the southern slope; and restoration of removed vegetation.

Contact Information
Shawn Nevill, Principal Planner
Orange County Water District
18700 Ward Street
Fountain Valley, CA 92708

Phone : (714) 378-3256


33°48'40"N 117°48'5"W
Orange Villa Park
Cross Streets
Lemon Street and Villa Park Road
State Highways
Oakridge Private School
Santiago Creek, Santiago Recharge Basins

Notice of Completion

Review Period Start
Review Period End
Local Action
Other Action Project Approval
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Greenhouse Gas Emissions Housing Minerals Noise Public Services Recreation/Parks Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Tribal Cultural Resources Vegetation Water Quality Water Supply Wetland/Riparian Wildlife Other Energy
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of State Parks, Division of Boating and Waterways California Department of Transportation, District 12 California Department of Water Resources California Governor's Office of Emergency Services California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Regional Water Quality Control Board, Santa Ana Region 8 California State Lands Commission Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Water Quality State Water Resources Control Board, Division of Water Rights California Department of Fish and Wildlife, South Coast Region 5


Environmental Document
Appendix A - Prior Scoping   PDF 4035 K Appendix B - Air Quality and GHG Memo   PDF 2732 K Appendix C - Biological Resources Report   PDF 2377 K Appendix D - Phase I Cultural Resources Report and Paleo Records Search   PDF 13262 K Appendix E - Geotechnical Assessment   PDF 4278 K Appendix F - Noise Memo   PDF 3278 K Appendix G - AB52 Tribal Consultation   PDF 4256 K Appendix H - Detailed Grading Plan   PDF 20820 K OCWD Smith Basin Improvement Project NOI   PDF 179 K Public Review Draft ISMND Smith Basin Repair Project   PDF 3351 K State Clearinghouse Summary_Form_for_Document_Submittal   DOCX 20 K
Smith Basin Improvement Project NOC   PDF 631 K
State Comments
2018061058_CDFW Comment   PDF 273 K

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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