City of Santa Rosa image CIP

Capital Improvement Project

Cobblestone Dr Zone R2-R4 Water Main Connection

Estimated Construction Schedule: Slated to begin April, 2023 and is anticipated to be completed November, 2023.
Construction Contract Amount: Pending
Project ID #: 1999
Description: The Project will install approximately 1,045 linear feet of new 10-inch diameter water main and a pressure-reducing assembly that will connect a high-pressure zone with a lower-pressure zone to improve fire protection in the Cobblestone neighborhood. Approximately 174 linear feet of 8-inch diameter water main will be added near the southern end of Cobblestone Drive to provide operational flexibility including the ability to isolate the Cobblestone neighborhood into a separate pressure zone.

Construction Update Image

August-September, 2023: The majority of the work is now complete (8-24-23). The high pressure zone has been connected to the low pressure (Cobblestone) zone. Now, if your neighborhood experiences a low pressure situation, for example, if a fire hydrant is opened, the new pipeline pressure reducing valve will fully open to supply the large amount of water and pressure that my be required to fight a fire. This is a huge safety improvement to your neighborhood that hopefully you will never need, but if you do, it is there. Additionally, the system has been set to provide a small increase in your daily water pressure from what it was previously. The new water pressure is enough to be noticeable and is generally considered preferrable by customers.


Andrew Wilt
Associate Civil Engineer
City of Santa Rosa

Michael Mirich
Civil Engineering Tech III
City of Santa Rosa
+1 (707) 481-9395

Ben Bryant
Consultant Design Engineer
Brelje and Race

Mike Janet
Consultant Construction Manager

Notice of Intent to Adopt a Mitigated Negative Declaration
Bid Tabs C01999

Other Information:
Final Initial Study MND with Addendum April 2020
C01999 Invitation for Bids (for information only - see PlanetBids for bidding)
C01999 Plans (for information only - see PlanetBids for bidding)
Click for larger image
Project Image

Note: All dates and times are subject to change.