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Project: Central Jefferson High Green Alley Multi-Benefit Stormwater Project

Description: The Central-Jefferson High Green Alley Multi-Benefit Stormwater Project will renovate a 54,446 square-foot public alley right of way in a high density 100-acre neighborhood block in South Los Angeles. Project improvements will include the installation of high albedo pavement, permeable pavers, permeable pavement, street tree planting, infiltration trenches, a dry well system, planting of native vines and trees, educational and mile marker signage, public art and traffic calming measures including planted bump-outs, crosswalk striping, lights and way finding signage. Of the total alley, 34,733 sq-ft will include stormwater Best Management Practices (BMPs) and an underground drywell system capturing a total tributary area of approximately 7.31 acres. The remaining 19,713 square feet of alley will include stormwater BMPs, comprised of native vine and tree plantings, and porous pavement. The green alley network in total will capture runoff and percolate at least 1,890,000 gallons of stormwater per year.

Reference Number: 3825P01RMC19007

Implemented By: The Trust for Public Land

Objective: Increase water sustainability in urban South Los Angeles through reducing stormwater runoff and increasing aquifer recharge; use urban greening strategies to provide measurable additional environmental and social benefits

Type: Recreation/Access/Interpretation, Infrastructure Improvement, Water Management

Total Cost: $5,882,848.00

Project Status: Project Implementation

On Time?: Yes    Within Scope?: Yes    Within Budget?: Yes

Estimated Completion: 12/30/2022    Actual Completion:

Associated Counties: Los Angeles

Project Benefits a Disadvantaged Community (or SDAC): Yes

Contribution SourcesContribution DateContribution Amount
Federal Contribution2/3/2020$1,657,486.00
Other State Funds2/3/2020$3,580,000.00
Prop. 1, Ecosystem, Watershed Protection and Restoration2/3/2020$645,362.00

Project MetricMetric TopicQuantityUnit
Infrastructure ImprovementRecreation Building/Structure Improvement or Development  
Water ManagementStormwater Flood / Capture  

Water Action Plan Target

Make Conservation a California Way of LifeAction Description
Expand Water Storage Capacity and Improve Groundwater ManagementAction Description


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