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The original item was published from 8/28/2023 8:44:00 AM to 10/5/2023 8:22:01 AM.

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Public Works News Flash

Posted on: January 20, 2023

[ARCHIVED] (Updated 8/22/23) Status of Road Closures in Contra Costa County

Contra Costa County Public Works Road Closure Information

(Updated) August 22, 2023, 8:50 a.m., Unincorporated Contra Costa County, CA - Contra Costa County Public Works continues to evaluate damages to roads and other issues related to the Winter storms of December 2022 through March 2023. Below is the current status of the county-maintained roads that are fully or partially closed in unincorporated Contra Costa County:

Partial Closures

  • (Updated 8/22/23) San Pablo Dam Road- a portion of the westbound lane of San Pablo Dam Road (approximately 200 ft. SE of La Honda Road) is closed due to road embankment and culvert failure.  Temporary traffic control devices are in place to direct traffic around the damaged section of roadway.  Preliminary design plans for the repair are underway with final plans expected in early 2024. Construction date has not been set as it is dependent on funding received for this project. To learn more about this project visit: 
  • (Updated 8/17/23) Norris Canyon Road- one lane of traffic is closed between Ashbourne Drive and the County line due to road embankment failure. K-rails and stop-controls are currently being used to guide traffic through this section of the road. A construction date of Summer 2025 is anticipated. We will provide updates as they become available.

Full Closures

  • (Updated 6/8/23) Wildcat Canyon Road- is completely closed to all traffic between San Pablo Dam Road and Inspiration Point due to storm related issues (erosion/slides) and for the public's safety.  The Public Works Department is completing its assessment of the damage to Wildcat Canyon Road. We are beginning the design of the new retaining wall and are working to complete the required environmental clearances for construction.  We had anticipated a Summer 2025 construction date, but are making every effort to advance the schedule to 2024. For more information visit the project webpage at: 

For road closure updates & other important information follow us on Twitter @cccpublicworks:

Please avoid these areas and limit traveling during stormy weather, unless necessary, due to localized flooding, downed trees, and hazardous situations. Do not attempt to cross flooded roads - driving, riding or walking.  We also advise residents to stay out of the creeks and flood control channels.

  • For information regarding collection and reporting of rain and stream gauge data from District gauges, we recommend the following sites:

For winter storm preparedness tips & resources-including flood forecasting tools:  

County Public Works Maintenance maintain sandbag stations and continue to replenish sand and sandbags in anticipation of future storm events. Sand & sandbags are free, please bring a shovel. To find your nearest sandbag station visit: 

County Public Works Maintenance road crews maintain the storm drain inlets through a program of annual inspection and cleaning.  To report a clogged catch basin or drainage inlet, in unincorporated Contra Costa County, please call the Public Works Maintenance Division at 925-313-7000 during work hours and after hours call Sheriff’s Dispatch at 925-646-2441. To learn how you can report service issues to us from your mobile device using our free Mobile Citizen App visit: 


About Contra Costa County Public Works Department:

Contra Costa County Public Works Department (CCCPWD) maintains over 660 miles of roads, 150 miles of streams, channels and other drainage and over 150 County buildings throughout Contra Costa County. CCCPWD provides services such as Parks and Recreation, Sandbag Distribution and Flood Control throughout unincorporated areas of Contra Costa County. CCCPWD operates two airports, Buchanan Field Airport in Concord and Byron Airport in Byron. For more information about CCCPWD, please visit us at 


Contact: Kelly Kalfsbeek 925.313.2115, 925.723.2382


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