Summer 2017 Project on Village Parkway
DSRSD is rehabilitating a major sewer pipeline that runs under Village Parkway in Dublin all the way to the wastewater treatment plant in Pleasanton. Work in Dublin is from mid-June through August and in Pleasanton from August through October.
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.
06/15/2017 11:14 a.m.
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Sound Planning to Manage Aging Infrastructure
Installed in 1960, 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. The expected cost of the project is $6.7 million. DSRSD invests a portion of sewer charges over time to pay for projects like these.
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 is rehabilitating the 57-year-old pipe in the summer of 2017.
If you have questions not answered here, contact the project manager: Associate Civil Engineer
, (925) 875-2258.
Why is this work needed?
The trunk sewer was installed in 1960 and is nearing the end of its useful life. Sulfides in the wastewater have caused significant spalling (flaking) of the pipe's interior concrete surface and exposed reinforcing steel in some locations. Rehabilitating the pipe now will help avoid a pipe failure or sanitary sewer overflow and add another 50 years to the pipe's expected life.
What streets are affected?
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
Will sewage service be interrupted at any time?
No. Sewage will flow through a temporary, 18-inch bypass line (pipe) during construction. The bypass line will be pressurized by pumps and monitored by an on-site person, 24 hours a day, anytime it is operating. A vactor truck will service portions of the bypass line periodically during construction. Once the project is completed, the contractor will remove the bypass line and repair pavement where needed.
Where is the bypass line?
Originally we planned to run the bypass line along Village Parkway; however Zone 7 Water Agency has allowed us to put it on the access roads that run along its flood control channels, away from traffic. This simplifies installation and removal. Our contractor will repair some storm damage to the channel banks where needed for safe operation of the pipe. At street crossings, the pipe will be buried in a shallow trench covered by steel plates.
When will construction begin and end?
In Dublin, the work will begin June 19 and end in mid-August. Then the work will continue in Pleasanton from August until October.
What time of day will construction occur?
Daytime work hours in residential areas are 7 a.m. to 7 p.m., Monday through Saturday. In commercial areas, the contractor will work a 24/7 schedule in order to finish the project as quickly as possible. Work that makes a driveway temporarily inaccessible, as well as work in major intersections, will be done at night whenever possible.
What will construction mean for residents?
In residential areas, the contractor is allowed to work Monday through Saturday from 7 a.m. to 7 p.m. but not at night or on Sundays or holidays. There may be temporary detours for a few hours at a time when work crosses an intersection or driveway. The contractor will work closely with residents to provide advance notice when work will be done near their property.
What is the expected nighttime noise level in residential areas??
Several pumps will run continuously to keep sewage flowing through the bypass line. Residents on Tamarack Drive near Village Parkway may hear pump noise at night. To dampen the sound, the pump is located in the road median, away from homes.
What will construction mean for the traveling public?
We realize Village Parkway is an important artery and construction creates significant inconvenience. We scheduled the work for summer when school traffic is at a minimum. The work will require intermittent lane closures on Village Parkway. For one 30-hour period, the intersection of Village Parkway and Lewis Avenue (near the post office) will be partially closed, with no left or U-turns allowed. Another 30-hour closure will prevent left turns at Hastings Way. There may be other temporary detours for a few hours at a time when work has to be done in an intersection or commercial driveway, but these tasks will be done at night whenever possible.
Will businesses be open and accessible during construction?
Yes. Work that makes a commercial driveway temporarily inaccessible will be done at night. DSRSD will post signs that businesses are open during construction and the contractor will work closely with business owners to provide advance notice when work will be done in front of their property.
Will on-street parking be allowed on Village Parkway?
Some on-street parking will be blocked temporarily while the pipe liner is being installed on the west (southbound) side of Village Parkway south of Amador Valley Boulevard. Once construction moves down the street, these parking spots will reopen. The construction will not affect on-street parking on the east (northbound) side of Village Parkway, nor any parking lots.
Will pedestrian access be maintained on Village Parkway?
Yes, and bus stops will be accessible.
How will odors be controlled?
The contractor will control sewage odors by injecting calcium nitrate into the pipe. Calcium nitrate is a colorless salt that prevents the microorganisms in sewage from producing hydrogen sulphide (a gas that smells like rotten eggs) and encourages them to consume easily degraded organic matter.
The chemical styrene, which is used in the cured-in-place pipe resin, will emit a glue-like odor during installation. It will dissipate quickly in the air but could linger in sewer pipes for up to 24 hours. Property owners can take simple precautions to help reduce this odor indoors. When notified that construction will occur near your property, run a small amount of water in all sinks and basins (especially those that are not used regularly) to make sure p-traps are filled. Completely cover floor drains with a wet towel or a zip-lock bag filled with water and leave them in place for 24 hours after the work ends.
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