Sewer Project General Background

The Central Contra Costa Sanitary District - Grayson Creek Trunk Line Project is a Central Contra Costa Sanitary District (CCCSD) major rehabilitation project and not a City funded project.

The City is coordinating permit work activities with CCCSD which began construction of the Grayson Creek Trunk Line Project in May 2016.  Mountain Cascade, Inc., (CCCSD hired contractor) will install a new sewer main at the Contra Costa Canal on Westover Drive, between Westover Lane and Maureen Lane.

The work will be performed via the tunneling method and is expected to be completed in January 2018. Construction activities will include traffic control, excavation, shoring, installation of the new pipe and backfill. In order to complete this work, the southern lane/shoulder along Westover Drive at the trail will be closed during this phase of work. Traffic delays are anticipated during peak commute hours.

For CCCSD's "Major Sewer Construction in Pleasant Hill" article on the project please click here.

Traffic Alert

Mountain Cascade, Inc., is working on Pleasant Hill Road between Westover Drive and the city limits between the hours of  8:30 a.m. to 3:00 pm. Informational signs as well as changeable message boards are installed strategically around the work area. Motorists are encouraged to drive slowly through the work zones, and obey all detour signs. 

For any questions, please contact Chris Carpenter, CCCSD at (925) 229-7200.

For project information visit

CCCSD Sewer Project Updates

Please click below for articles from the City's Weekly Update postings:

September 2017

October 2017