Baldwin Lake and Tule Pond Restoration Project Los

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 1

Project Location 2

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 3

Project Description • Treatment of residential street runoff • Removal of a net of 44, 000 CY of sediment to deepen the Lake and Pond 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 4

Baldwin Lake Edge Treatment 5

Water Runoff Treatment 6

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 7

Funding Details Funding: Total Project Cost: $13. 6 M Matching Funds (Amount and %): 10. 6 M Grant Request: $3 M 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 • • 8

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 9

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 10

Estimated Budget Table 1 – Project Budget Category Requested Grant Amount Other Cost Share (including other State Sources Total Cost $1. 2 M - - - - Planning/Design /Engineering /Environmental Documentation $2. 1 M - - $2. 1 M Construction/ Implementation $7. 3 M $3 M - $10. 3 M $10. 6 M $3 M - $13. 6 M Project Administration Land Purchase/Easement Grand Total 11 Cost Share: Non. State Fund Source

Project Schedule Task Start Date End Date February 2019 February 2023 NA NA August 2019 December 2020 Final Design December 2020 August 2021 Construction April 2022 December 2022 Direct Project Administration Land Purchase/Easement Planning/Design/ Engineering/ Environmental Documentation 12

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 $2 M. 13