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Viewridge Road Super Green Streets

Viewridge Road Super Green Streets. County of Los Angeles Alberto Grajeda , P.E. algrajeda@dpw.lacounty.gov 626-458-5908. Project Location. Location: Santa Monica Bay Watershed Located in the Unincorporated Community of Topanga. Project Description. BMP Locations: Viewridge Road

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Viewridge Road Super Green Streets

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  1. Viewridge Road Super Green Streets County of Los Angeles Alberto Grajeda, P.E. algrajeda@dpw.lacounty.gov 626-458-5908

  2. Project Location • Location: • Santa Monica Bay Watershed • Located in the Unincorporated Community of Topanga

  3. Project Description • BMP Locations: • Viewridge Road • Hodler Drive • Chagall Road • Voltaire Drive

  4. Project Description • Viewridge Road Center Median: • Divert flows from storm drain • Approx. 18 Bio-filtration units • Vegetated center median* • Flow through treatment • Discharge into Topanga Canyon Creek *Drought tolerant, California native plants only. No trees.

  5. Project Description • Hodler Drive Et Al. : • Curb inlets • Approx. 22 bio-filtration units • Improve or match existing parkway • Flow through treatment • Discharge into existing catch basin

  6. Project Outreach • Outreach Strategies: • Public Workshops were held jointly with the Malibu Creek Watershed Group in May 2014, November 2014, and May 2015 • https://www.malibucity.org/653/Enhanced-Watershed-Management-Program • Outreach to community groups • Community outreach planned in summer 2019 • Public Feedback: • TBD • Planned Long-Term Project Messaging: • Project website developed with customized infographics • Interpretive educational signage to be located at project site Date and Location TBD

  7. Funding Details Funding: • Total estimated project cost: $8.8M • Grant request: $1M • Matching funds: $7.8M (88.6%) • Los Angeles County General Fund • Estimated O&M cost per year: TBD

  8. Program Preferences Project Location Topanga Canyon Creek (303d) Other Impaired Waterbodies Climate Change • Drought tolerant landscaping • Reduce heat island effect Improve Regional Self-Reliance • Capture urban/stormwater runoff • Irrigate proposed center median • Reduce potable water demand Protect and Restore Important Ecosystems • Improve water quality • Restore coastal watershed Approximate Useful Life: 30 Years Expected CEQA and Permit Completion: March 2020

  9. Benefits Water Quality • Potential to treat 33 AFY stormwater and urban runoff • Address TMDL’s (SMBBB, Nutrients, Trash, Sediment) • Improve beneficial use of Topanga Canyon Creek (Lead Impairment) • Potential Pollutant Load Reduction per year (WMMS): • 64 lbs N • 66 lbs P • 0.9 lbs Pb (303(d) List Topanga Canyon Creek) Water Supply • Pump well • Capture stormwater and urban runoff (0.01 – 0.05 AFY) • Irrigate proposed center median up to three days Climate Change • Vegetated center median will reduce heat island effect • Cistern/pump well to offset potable water demand

  10. Estimated Budget

  11. Project Schedule

  12. Other Considerations • LA County has an excellent track record developing and implementing projects. • The Roosevelt Park Stormwater Capture Project, currently in construction, was a past recipient of the IRWM Grant. Grant Executed December 2016. • Robust Monitoring Program for all Stormwater Capture Projects. • In 2020, Project may also be considered for funding through the Safe Clean Water Program

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