Each year, selected roads throughout unincorporated Contra Costa County receive a surface treatment between June and October. The County Public Works Department has found that a program of preventive maintenance using surface treatments is the most cost effective way to extend the useful life of the County’s road network.
Surface treatments protect pavements from the damaging effects of water and air infiltration and sunlight exposure that can rapidly deteriorate a road. In many cases, the use of a surface treatment will eliminate the need to do expensive pavement patching and will add years to the life of the existing pavement. Surface treatments typically used by the County Public Works Department are single chip seal, double chip seal, slurry seal, cape seal, and microsurface seal. Visit the Public Works Pavement Management Program webpage for more information.