|Click the map above to open an enlarged view of the area affected by the Dublin trunk sewer rehabilitation project.
Summer 2017 Project Will Affect Village Parkway Traffic
This summer, DSRSD will rehabilitate 8,000 feet of a major sewer pipeline to extend its life by 50 years. The Dublin trunk sewer is a reinforced concrete pipe, 33 to 42 inches in diameter, that carries sewage from smaller sanitary sewer mains in west Dublin and south San Ramon to the wastewater treatment plant.
The construction zone is shown on the map. Work in Dublin will be done from June through August and in Pleasanton from August through October.
First the contractor will install a temporary bypass pipe (red line), which will be pressurized by pumps (green and red squares) to keep sewage flowing to the treatment plant.
Next, the contractor will insert a flexible liner inside the old pipe (gold line) through existing manholes (black dots), one section at a time. The liner, known as a "cured-in-place pipe," hardens to form a rigid, smooth surface that restores the pipe's interior to near-new condition. Finally, the contractor will remove the bypass line and repair the pavement.
This approach is significantly less disruptive and less expensive than digging up and replacing the trunk sewer and can be done in a shorter time. Expected construction cost is $8.5 million. DSRSD invests a portion of sewer charges over time to pay for projects like these.
Streets Affected by Construction
Village Parkway from Tamarack Drive to 0.2 miles south of Dublin Boulevard
Tamarack Drive from Alene Street to Emerald Avenue
Hastings Way at Village Parkway
Amador Valley Boulevard from Interstate 680 underpass to 350 feet east of the intersection
Dublin Boulevard from Interstate 680 underpass to 350 feet east of the intersection
Commerce Circle in Pleasanton, north side
In residential areas, the contractor will work in the daytime to minimize nighttime noise. In commercial areas, the contractor will work a 24/7 schedule to finish the project as quickly as possible. Work that blocks driveways and major intersections will be done at night to minimize traffic congestion. Whenever the bypass line is operating, a person will be on-site to monitor it, 24 hours a day. Read the Frequently Asked Questions below for additional information.
We're Keeping the Community Informed
- An informational meeting for property owners in the construction zone was held on March 15 (view the presentation).
- The 20-day public review period for the project's Draft Initial Study/Mitigated Negative Declaration (an environmental review process) ends on April 26, 2017. Affected property owners received a notice explaining how to submit comments.
- Before work starts, we will mail a postcard to about 4,000 homes and businesses surrounding the construction zone to advise them of potential traffic impacts.
- During construction, the contractor will post "Businesses are open!" signs and give property owners advance notice of work that impacts them directly.
- We will post updates on this web page (www.dsrsd.com/trunksewer) as well as on Nextdoor and Twitter (@DSRSDnews) To receive an email that we've posted new information, sign up for eNotifications (select the news category "Your Dollars at Work").
If you have specific questions, contact the project manager: Associate Civil Engineer Jaclyn Yee, (925) 875-2258.
Frequently Asked Questions
Sound Planning to Manage Aging Infrastructure
|Sulfides in wastewater have caused significant corrosion (dark yellow patches) to the interior of the Dublin trunk sewer, exposing reinforcing steel in some locations. DSRSD will rehabilitate the 55-year-old pipe in the summer of 2017.
Installed in 1960 and 1961, the Dublin trunk sewer is nearing the end of its useful life. DSRSD did acoustic and video studies in 2014 to assess the pipe's condition and then hired an engineering firm to design a cost-effective rehabilitation project that would minimize impacts on businesses and residents.
DSRSD proactively manages vital community infrastructure to maintain essential services, avoid costly emergency repairs, and protect public health and the environment.