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Project: County of Los Angeles - Gates Canyon - Construction Project

Description: This Project will be located at Gates Canyon Park, an existing 8.2-acre park located within a residential portion of upper Malibu Creek Watershed. The Project which will capture stormwater and dry weather flows and will be designed to capture and infiltrate up to the 85th percentile 24-hour stormwater volume of 3.1 acre-feet from the 105-acre watershed at Gates Canyon Park. The stormwater will be diverted from an existing storm drain at the park to a Hydrodynamic Separator then into an underground cistern. A pump well will be installed at the cistern with two pumps. One pump will convey stormwater through an ozone generator and ultra-violet treatment to be used for irrigation of the park and the other pump will be used to divert stormwater to infiltration wells for groundwater recharge. The Project is expected to capture 12,401,887 gallons of stormwater runoff for an average rainfall year.

Reference Number: 3940P01D1712664

Implemented By: County of Los Angeles

Objective: The project consists of a pretreatment system, underground cistern for storage, irrigation of treated storm water and infiltration dry wells providing water quality benefits.

Type: Water Management

Total Cost: $3,300,000.00

Project Status: Project Implementation

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

Estimated Completion: 10/31/2020    Actual Completion:

Associated Counties: Los Angeles

Project Benefits a Disadvantaged Community (or SDAC): No

Contribution SourcesContribution DateContribution Amount
Prop. 1, Multibenefit Stormwater Management Projects7/23/2018$3,300,000.00

Project MetricMetric TopicQuantityUnit
Water ManagementOther  

Water Action Plan Target

Expand Water Storage Capacity and Improve Groundwater ManagementAction Description


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