SR-73 Basin Stormwater Mitigation and Slope Stability

3 Documents in Project

Summary

SCH Number
2010051014
Lead Agency
California Department of Transportation, District 12
Document Title
SR-73 Basin Stormwater Mitigation and Slope Stability
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
Open Space; Planned Community; Residential; Research/Industrial

Document Description
SR 73 possesses a system of 39 storm water detention basins that capture and filter runoff from the highway prior to discharging it to natural drainage areas. Water quality monitoring was performed in the basins during the rainy seasons of 2004/2005. An excessive amount of sediment was observed in some of the basins. The sediment load is believed to originate from outside the footprint of the basins, but from within the watershed. The sediment load may comprise the filtering capability of the basins. The intent of this project is to prevent erosion from entering into 9 of the basins by implementing various erosion control measures (e.g. slope stabilization, slope redesign).

Contact Information
Smita Deshpande
California Department of Transportation, District 12
Lead/Public Agency
3347 Michelson Drive, Suite 100
Irvine, CA 92612

Phone : (949) 724-2245

Location

Cities
Laguna Niguel Newport Beach
Counties
Orange
Cross Streets
MacArthur Blvd to Greenfield Dr
Total Acres
43
State Highways
SR 73
Airports
John Wayne
Schools
Sage Hill HS
Waterways
San Diego Creek, Bonita Creek, Aliso Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Waste Treatment:Other (stormwater)
Project Issues
Aesthetics Agriculture and Forestry Resources Air Quality Biological Resources Cultural Resources Cumulative Effects Flood Plain/Flooding Geology/Soils Growth Inducement Hazards & Hazardous Materials Hydrology/Water Quality Land Use/Planning Mineral Resources Noise Population/Housing Public Services Recreation Schools/Universities Solid Waste Transportation Vegetation Wetland/Riparian Paleo; utilities
Reviewing Agencies
California Department of Fish and Wildlife, South Coast Region 5 (CDFW) California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission (NAHC) California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB) Caltrans, Division of Aeronautics Department of Water Resources Office of Emergency Services, California Resources Agency State Water Resources Control Board, Divison of Financial Assistance

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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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