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Project: City of Antioch Stormwater Flood Management Grant Proposal

Description: This Project replaces an inadequate trapezoidal concrete ditch and arch culverts with three box culverts spanning 620 linear feet. This will provide a 25-year level of flood protection and increase the capacity of the reach from less than 400 cfs to 2,810 cfs addressing chronic flooding of West Antioch Creek through the installation of three 14’ by 7’ Caltrans Standard Box Culverts. These box culverts will increase the storm water capacity of the creek.

Reference Number: 3860-P1E-348

Implemented By: City of Antioch

Objective: Manage stormwater runoff to reduce flood damage and where feasible, provide other benefits, including groundwater recharge, water quality improvement, and ecosystem restoration.

Type: Water Management

Total Cost: $6,196,388.47

Project Status: Complete and Fully Paid

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

Estimated Completion: 12/31/2018    Actual Completion: 4/4/2019

Associated Counties: Contra Costa



Contribution SourcesContribution DateContribution Amount
  $6,196,388.47
Local Contribution2/12/2002$3,202,700.00
Prop. 1E, Stormwater/Flood Management12/21/2011$2,993,688.47


Project MetricMetric TopicQuantityUnit
Water ManagementStormwater Flood / Capture  
Water ManagementWatershed Protection  

Location

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