The Public Works Department provides for the construction, maintenance and improvement of infrastructure within the unincorporated area of the County and the Flood Control District as well as county buildings and grounds. The department is organized to conform to the process of developing and building projects. Public Works maintains 660 miles of roads and 150 miles of streams; channels and other drainage facilities as well as maintains 93 county buildings.
Contra Costa County Public Works Department became the first County in California to be accredited by the American Public Works Association in July 2001 and we were re-accredited in 2004, 2008, 2012 and 2016. We continue to review and improve our work processes and are now re-evaluated for accreditation on a four-year cycle.