Petaluma Boulevard South Improvements


Wondering what in the world is going on these days on Petaluma Boulevard South? Quite a bit, actually!

Over the next 18 months, Petaluma Boulevard South, the southern gateway to our city (and the original Highway 101), will be getting some major upgrades to benefit all users - pedestrians, bicyclists, and motor vehicles. Construction is taking place on two consecutive improvement projects: the Water Main Replacement and the Road Diet.

The Water Main Replacement project (currently underway) is designed to replace the aging water main that runs between D Street and Mountain View Avenue. Once completed, the Water Main Replacement will offer improved water service and increased water pressure for fire protection.

The Road Diet will transform the Boulevard South from Crystal Lane to downtown, providing increased safety, mobility, and access for all road users. The current four lanes of traffic will be reduced to two, making room for bike lanes and improved pedestrian safety. Construction on this phase of the project is anticipated to begin in the fall of 2021.

Below you will find each phase of the Petaluma Boulevard South improvements outlined in detail. All work is expected to be completed by the fall of 2022.

Questions or concerns? Please contact the project managers listed in the descriptions below.

City Projects


Project Description

This project involves installing approximately 1,500 feet of 8-inch polyvinyl chloride (PVC) water main to replace aging 4-inch cast iron water main on Petaluma Blvd. South between D Street and Mountain View Avenue.

Installation of this water main will improve the pressure for fire protection in the area, as well as the reliability of this piece of aging critical infrastructure which is nearing the end of its useful life. The project also includes installation of new water services to users along the project area to meet City requirements, and new fire services for commercial buildings.

Project Location

Petaluma Blvd. South between D Street and Mountain View Avenue.

Traffic Impacts & Benefits

The project will impact Petaluma Boulevard South. The water main installation work will close one southbound lane in the area of construction, and water service installation will impact both southbound and northbound lanes in the immediate vicinity of the work.  All traffic restrictions will be posted for drivers with signage. Ingress and egress to homes and businesses will be maintained. Traffic control and routing measures will be implemented to maintain through traffic in the area.

Project Status

Update July 9, 2021: Water services on H Street and 2nd Street are being replaced and connected to the existing 8-inch water main in the road. The work will allow the abandonment of the existing 4-inch cast iron water main in the area and allow final connection tie-ins to the new water main at I Street and the Blvd. that still remain. Some service may be interrupted. Residents will be notified 24-48 hours in advance.

Update April 5, 2021: The installation of the water main on Petaluma Blvd From D Street to H Street, including all domestic water services and Fire services have been completed.  Currently the Contractor is installing new water and fire services from I Street to Mountain View Avenue.  These water service replacements require the water main to be shutdown in order to complete the work.  Individual water services will be interrupted during this time and may be shut off for up to 4 hours. This will occur during the work hours from 8:00 a.m. to 3:00 p.m. Door notices will be placed on residences and businesses affected by this shutdown at least 24 to 48 hours in advance of any water being shut off. If you have any questions or concerns, please contact the City at (707) 778-4546 to discuss. Work is expected to be complete in May.


This project is being funded by Water Enterprise Funds.

BID Details

Engineer's Estimate                        $1,300,000


Name of Bidder                                Bid Total


Michael Paul Co. Inc.                        $  637,100            Withdrew bid


W.R. Forde Inc.                                 $  886,300            Unresponsive bid


Coastside Concrete                          $1,010,500           Lowest responsive bid


Team Ghilotti Inc.                              $1,087,141


Pat Nelson Construction                   $1,515,400


Piazza Construction                          $1,545,490


Argonaut Constructors                      $1,634,950


Ghilotti Construction                         $1,680,400



Project Description

This is a federally-funded project between E Street and Crystal Lane. The project will reduce the existing four lanes to one through-lane in either direction and a center two-way left turn lane.

The project includes new curb ramp, curb extensions, rectangular rapid flashing beacons (RRFB’s), signal improvements and repaving. The project will include a Class IV bike lane between Crystal Lane and Mountain View; a Class II bike lane between Mountain View and H Street; and a Class III bike lane between H Street and E Street.

Project Location

Petaluma Blvd South from Crystal Lane to downtown.

Traffic Impacts & Benefits

The traffic impact schedule will be posted as the project nears its start date.

Project Status

Project is currently in the design phase. Construction is anticipated to begin in fall of 2021.



BID Details

The project is currently being designed in-house. Information about bid needs and requirements will be posted as it becomes available.

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