Baldwin Lake and Tule Pond Restoration Project in Los Angeles County

1. Baldwin Lake and Tule Pond Restoration Project Los Angeles County Flood Control District Dana Robertson II Email: drobertson@dpw.lacounty.gov Phone Number: (626) 458-7101

2. Project Location Project Location

3. Existing Conditions • The Lake is only two to three feet deep due to sediment accumulation • Recorded bird sightings have been reduced by 22%, and aquatic waterfowl numbers and variety have been dramatically impacted • Contaminants haven been detected in Tule Pond near the outfall

4. Project Description • Treatment of residential street runoff • Removal of a net of 44,000 CY of sediment to deepen the Lake and Pond and allow for a healthy aquatic ecosystem • Restoration of 1,300 feet of the Lake’s historic perimeter retaining walls and other shoreline stabilization methods for the remaining perimeter • Installation of a liner, recirculation pumps, and aeration units • Landscaping, viewing areas, and educational improvements

5. Baldwin Lake Edge Treatment

6. Water Runoff Treatment

7. Project Outreach • Coordinating project development with: • Los Angeles County Department of Parks and Recreation • The Arboretum Foundation • The City of Arcadia • Public meetings will be held to give the community and various stakeholders an opportunity to provide input on project components  • Notices will be distributed to inform the public about potential construction impacts • A preliminary project planning meeting was attended by  members of the Arboretum Foundation’s Baldwin Lake Task Force, a group made up of Arboretum trustees and volunteers

8. Funding Details Funding: • Total Project Cost: $13.6M • Matching Funds (Amount and %): 10.6M  • Grant Request: $3M • Matching Funds Sources: Los Angeles County Flood Control District • O&M costs per year: $161,000 Partners: • City of Arcadia, Department of Parks and Recreation, The Arboretum Foundation

9. Program Preferences • Climate Change:  • Increases groundwater infiltration and reduces the amount of potable water utilized • Less reliance on imported water, saving energy and preventing carbon from being released to the atmosphere • Net gain in the number of trees surrounding the Lake and Pond, resulting in carbon sequestration • Regional Water Self-Reliance: • Supports and complements the Arcadia Arboretum Ecosystem Restoration and Groundwater Recharge Revised EWMP Project • Provides groundwater recharge in the Raymond Groundwater Basin • Statewide Priorities Objectives addressed: • Increase regional self-reliance and integrated water management across all levels of government • Protect and Restore Important Ecosystems • Expand Water Storage Capacity and Improve Groundwater Management • Expected useful life of 50-years • CEQA Completion and Permit Completion: December 2020 

10. Benefits • Project will: • Restore the aquatic ecosystem by increasing the wildlife in the Lake and Pond • Improve water quality by treating stormwater • Reduce potable water demand by lining the Lake and Pond to reduce water loss • Infiltrate stormwater and low flow runoff • Enhance the aesthetic, historical, and operational features of the Lake and Pond • Project addresses critical need(s) of the GLAC region: • Improves water supply: Stormwater will be collected and percolated into the groundwater table • Improves surface water quality: Contaminated urban runoff will be treated • Enhances open space, habitat, and recreational features: Increased water depth will improve the ecosystem for wildlife and various recreational features will be included • Addresses climate change: Reduction in potable water use and increased infiltration reduces imported water use and hence reduces energy consumption; and tree plantings result in carbon sequestration

11. Estimated Budget

12. Project Schedule

13. Other Considerations • In 2020, the project may also be considered for funding through the Safe Clean Water Program • Currently in the process of applying for the Rivers and Mountains Conservancy Proposition 68 Grant for $2M.