SCH Number 2019129044


Project Info

Title
State Route 57 Stormwater Mitigation Project
Description
Caltrans proposes to provide long-term measures to reduce pollutant contributions to the San Gabriel River-Coyote Creek Watershed by construction of a detention basin within the northbound State Route 57 Tonner Canyon Off-Ramp loop at Post Mile 22.0 in unincorporated Orange County, California. The proposed project will construct a detention basin as a form of a treatment Best Management Practice that will connect and discharge to the existing drainage system. In addition, the proposed project will add a maintenance vehicle access road within the off-ramp, a Midwest guardrail system along the right-side of the off-ramp loop, and relocate and add additional light posts for the off-ramp.
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3 documents in project

Type Lead Agency Received Title
California Department of Transportation, District 12 State Route 57 (SR 57) Stormwater Mitigation Project
California Department of Transportation, District 12 State Route 57 Storm Water Mitigation Project
California Department of Transportation, District 12 State Route 57 Stormwater Mitigation Project