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Recently Completed Projects
Interactive Capital Improvement Program Map
View completed CIP projects on an interactive map. You can also explore recently completed projects in the tabs below, which showcase our work from prior years. For ongoing and upcoming projects, visit our Capital Improvement Program webpages for detailed information about current projects under construction or scheduled to begin soon.
Palm/Mann/Cypress Gravity Sewer Improvements Project
Contract Awarded: June 2025
Substantially Completed: September 2025
Notice of Completion Recorded: October 2025
Contractor: Glosage Engineering, Inc.
Project Summary
In June 2025, the contract for the Palm-Mann-Cypress Gravity Sewer Improvements Project was awarded to Glosage Engineering, Inc., the low bidder, for a total of $3,544,115. The final construction cost was $3,280,858, or 30% below the Engineer’s Estimate.
The project replaced approximately 2.69 miles of aging gravity sanitary sewer pipelines in Kentfield, using pipe bursting as the primary construction method, with open-trench construction where pipe bursting was not feasible. These improvements increase system reliability, reduce maintenance needs, and minimize the risk of sewer spills.
The project was fast-tracked in response to the County of Marin's planned pavement rehabilitation on several streets in 2025. The Palm-Mann-Cypress project is a key part of the District's ongoing efforts to improve infrastructure and reduce capacity issues, as identified in the 2021 Infrastructure Asset Management Plan (IAMP). It also helps address downstream capacity concerns and mitigate inflow and infiltration (I&I) in the area.
Project Update - October 22, 2025:
The project reached substantial completion in September 2025, with only minor punch list items and site cleanup remaining. The Notice of Completion was officially recorded in October 2025, marking the formal completion of construction. Final project closeout is in progress.
Project Contact:
Phil Benedetti, RVSD Senior Engineer
Email Phil Benedetti
Call: 415-259-2949 x212
FY 2023/24 Gravity Sewer Improvements Project
Completed: September 2024
Contractor: Glosage Engineering, Inc.
Project Summary
The FY 2023-2024 Gravity Sewer Improvements Project rehabilitated approximately 15,600 linear feet (LF) of sewer pipeline ranging from 4 to 14 inches at various locations throughout the San Anselmo, Greenbrae, and Fairfax jurisdictions. Approximately 3,060 LF were constructed via open cut and 12,540 LF via pipe bursting. Forty new manholes were also constructed at various locations throughout the project. New manhole locations required excavation and backfill of an area approximately 8 feet by 8 feet, with varying depths. Most of these pipelines either fell within public right of way or in designated easements running through private property. For work in backyard easements, portable equipment was used due to space restrictions and to minimize impact. The purpose of the rehabilitation portion of the project was to reduce the risk of sanitary sewer spills. This was accomplished both by fixing defects that could cause overflows as well as sealing leaks, thus reducing wet weather inflow and infiltration.
Project Contact
Project Manager - Phil Benedetti
Call: 415-259-2949 x212
Woodland Road Creek Crossings and Capacity Improvements
Completed: July 2024
Contractor: Glosage Engineering, Inc.
Project Summary
The Woodland Road Creek Crossings and Capacity Improvements project focused on replacing and rehabilitating sewer creek crossings in the Kent Woodlands area, which were prioritized for upgrade. The replacement of these sewers was crucial due to their heightened vulnerability to stormwater-related natural forces, which posed a risk of contamination to Tamalpais Creek and potential damage to the public sewer system. The project involved removing several exposed sewers within the waterway and replacing the public sewer along various sections of Woodland Road.
Project Contact
Project Manager - Phil Benedetti
Call: 415-259-2949 x212
Larkspur Pump Stations 14, 15 & 25 Improvements Project
Completed: July 2023
Contractor: Pacific Infrastructure Corporation
Project Summary
The Larkspur Pump Station 14, 15, & 25 Improvements included replacing the generator for standby power, replacing a VFD, replacing pump/level controls with a new PLC-based control system, reviewing the odor control system for additional capacity, roof repair, and replacement of an internal concrete platform for safety.
Project Contact
Project Manager - Phil Benedetti
Call: 415-259-2949 x212
FY 2022/23 Gravity Sewer Improvements Project
Completed: June 2023
Contractor: Glosage Engineering, Inc.
Project Summary
The FY 2022/23 Gravity Sewer Improvements Project was completed in June 2023. A segment of this project has been named the Woodland Road Capacity Project to lower the sewer main out of the creek bed in several locations, improving habitat and better protecting aquatic resources.
Project Contact
Project Manager - Phil Benedetti
Call: 415-259-2949 x212
FY 2020/21 Gravity Sewer Improvements Project
Completed: September 2022
Contractor: Glosage Engineering, Inc.
Project Summary
The FY 2020/21 Gravity Sewer Improvements Project replaced approximately 2.25 miles of gravity sewer and additional restoration in Greenbrae, Larkspur, San Anselmo, Kent Woodlands and Ross.
Project Contact
Project Manager - Phil Benedetti
Call: 415-259-2949 x212
Butterfield/Arroyo-Kenrick Gravity Sewer Improvements Project
Completed: March 2022
Contractor: Ranger Pipelines, Inc.
Project Summary
The Butterfield/Arroyo-Kenrick Gravity Sewer Improvements Project installed 0.3 mi of diversion and replacement gravity sewer in San Anselmo between Arroyo Avenue and Kenrick Drive (on Butterfield Road) and replaced 0.3 mi of gravity sewer in Sleepy Hollow on lower Fawn Drive. The Butterfield section was the last capacity project required in the Cease and Desist Order from the Regional Water Quality Control Board, and the Fawn Drive section provides needed capacity and pipe replacement to prevent sanitary sewer overflows and reduce maintenance requirements.
Also included was 1,600 feet of new sewer line in the Butterfield Road right of way. Approximately 1,050 feet of sewer line in front yard easements were abandoned. Work on Fawn Drive replaced approximately 770 feet of sewer lines from Butterfield Road to #271 Fawn Drive.
Project Contact
Project Manager - Phil Benedetti
Call: 415-259-2949 x212
Ross Creek Sewer Removal Project
Completed: October 2021
Contractor: Coastside Construction
Project Summary
The Ross Creek Sewer Removal Project removed an abandoned 21-inch diameter sewer from the creek bed of Ross Creek at the Shady Lane bridge. In order to minimize upstream erosion, natural rock features were used to create a sustainable riffle structure in place of the sewer (which was originally installed in 1926 and a replacement siphon was installed 7.5 feet below the streambed in Oct. 2019).
The abandoned sewer removal from the streambed provides a more natural-looking water feature as viewed from the Shady Lane bridge, as well as the environmental benefits of improving conditions for anadromous fish migration of the native steelhead trout population of the Corte Madera Creek watershed.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
FY 19/20 Force Main Appurtenance Project
Completed: November 2020
Kentfield
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
Laurel Grove Sewer Rehabilitation Project
Completed: October 2020
Kentfield
Project Information
View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
Large Diameter Gravity Sewer Project II-3B
Completed: June 2020
Lower Shady Lane/Poplar Avenue
Project Information
- View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
FY 2016/17 Gravity Sewer Improvements Project
Completed: March 2020
Project Information
- View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
Kentfield Pump Station 15 Improvements
Completed: November 2019
Project Information
- View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
FY 2016/17 Gravity Sewer Rehabilitation Projects
Completed: October 2019
Fairfax, Larkspur, San Anselmo
Project Information
- View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
Large Diameter Gravity Sewer Project II-3A
Completed: September 2019
Ross Common/Upper Shady Lane
Project Information
- View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
FY 2016/17 Gravity Sewer Improvements
Completed: June 2019
San Anselmo (Nokomis & Meadowcroft)
Project Information
- View the Project Information Sheet by clicking the link.
Project Contact
General Manager - Steve Moore
Call: 415-870-9764
PS 12 Bon Air & PS 13 Greenbrae Rehabilitation Project
Completed: June 2019
Full pump station rehabilitation to improve the capacity, operation, and reliability of PS 12 Bon Air and PS 13 Greenbrae pump stations.
FY 15/16 Gravity Sewer Improvements Project
Completed: June 2019
6.7 miles of rehabilitation/replacement of gravity sewers by various methods in
Kent Woodlands Upper, Southwood, and Winship areas of Kentfield and Ross.
Large Diameter Gravity Sewer Rehabilitation Project II-1
Completed: July 2018
CIPP lining of 0.8 mi of 18- to 36-inch trunk sewer in San Anselmo and Ross including Techite portions of
Ross Valley Trunk Sewer and non-reinforced concrete Karl Ave trunk sewer.
Large Diameter Gravity Sewer Rehabilitation Project II-2
Completed: July 2018
CIPP lining of 0.6 mi of 18- and 36-inch trunk sewer in downtown San Anselmo including Techite portions of
Ross Valley Trunk Sewer and non-reinforced concrete trunk sewer.