Water Fact

Water Fact

MCWA's Shoremont Water Treatment Plant can produce up to 140 million gallons a day.

2017 Cement Lining Program


All or portions of the existing water mains on Beechwood Drive, West Avenue, Magnolia Avenue, East Elm Street, East Chestnut Street, East Avenue, Cedar Place, Wilson Avenue, East Spruce Street, East Hickory Street, Main Street, East Ivy Street, Northwood Avenue, East Filbert Street, Park Drive, Filbert Place, East Commercial Street and Madison Street will be cleaned and lined by a contractor hired by the Water Authority.

In conjunction with this work, the existing water main on Madison Street between East Spruce Street and East Filbert Street and between East Avenue and East Elm Street will be replaced.  As part of this work, the existing hydrants and valves will be replaced.  Service connections will be replaced as necessary.  The new water main will be 6" ductile iron and installed within the street right-of-way. 

Before the 1950’s, cast-iron water mains were not cement mortar lined. These unlined pipes eventually rust and hard deposits called tuberculation form on the interior of the pipe. This results in diminished flow capacity and water quality. As part of the cleaning and lining process, our contractor will remove all tuberculation and then apply a thin coating of cement mortar to the inside of the pipe to prevent further corrosion.

Cleaning and lining of water mains offers a significant cost advantage over their complete replacement. A cleaning and lining project requires only small excavations to access the main at about 500 foot intervals and at locations where water mains intersect.

Prior to beginning the cleaning and lining and main replacement work, MCWA has been marking the location of existing water services in the project area.  Both MCWA and a contractor are then checking operation of all existing customer shut-off valves and making repairs as necessary. 

The first step of the contractor’s work is to lay temporary bypass piping. This temporary piping is chlorinated, flushed, and health sampled by the Department of Health. After the health samples are approved, each customer’s home is temporarily connected by a hose to the bypass system. Excavations are then made at selected locations, and the main is cut to allow access for cleaning and lining equipment. A scraper is pulled through the pipeline until all tuberculation is removed, and then the main is flushed clean. The contractor then applies the cement mortar lining using a special machine. If conditions warrant, old fire hydrants and valves are replaced. After the mortar has set, the lining is inspected with a video camera and the main is pressure tested for leaks. Before customers are returned to the refurbished main, it is chlorinated, flushed, and tested by the Department of Health.

During final restoration, the temporary bypass system is removed and disturbed areas are restored to their preconstruction condition. Temporary asphalt is removed, and permanent asphalt is installed in paved areas. Lawn areas are graded and seeded, and the contractor is responsible for getting all seeded areas to grow properly.

Similarly, main replacement work is completed in four phases.  The first phase of the work is the actual main installation.  After the installation is completed, the new water main is pressure tested for leaks.  If any leaks are found, they are corrected.  Then the new water main is flushed and disinfected.  Health samples are taken for testing by the Department of Health.  After the main has successfully passed all tests, service connections are transferred from the old main to the new main.

During final restoration, disturbed areas are restored to their preconstruction condition. Temporary asphalt is removed, and permanent asphalt is installed in paved areas. Lawn areas are graded and seeded and the contractor is responsible for proper regrowth.


The schedule depends on a number of factors, but we anticipate our contractor starting work in late March and finishing the work by November.  You may be on the temporary bypass system for 10 to 12 weeks during the project. 


You may contact our Customer Service department at (585) 442-7200 weekdays from 8:30 am to 4:30 pm, or our Dispatcher at (585) 442-2009 weekdays before 8:30 and after 4:30 pm, and on weekends and holidays with questions or concerns. A Water Authority inspector will be onsite throughout construction. Our inspectors carry an ID card and drive a company vehicle with a Water Authority logo on it. They are happy to answer any questions you may have.

Project Bulletin

Click below for a project bulletin with further information on this project.

Project Bulletin

Frequently Asked Questions

Q: What determines replacement, relocation or relining of water mains?
A: Evaluation is primarily based on pipe age, the occurrence of breaks and repairs, and future hydraulic considerations.

Q: Will our water services need to be repaired?
A: The Water Authority is typically responsible for the portion of each building's water service that is in the public right-of-way or water main easement, up to and including the curb stop. The Water Authority will replace its portion of your service line and the curb stop during the project if needed.

Q: Will I have water service during the project?
A: If the water main that serves your home is being replaced, you will be notified in advance of any non-emergency service outages. Service to homes is temporarily shut down during installation of new service connections to the curb stop and during tie-in connections at the end of the water main installation.

Q: What are the advantages of cleaning and lining water mains?
A: Along with improved water quality, the ability to maintain pressures and flow for firefighting purposes is enhanced by the smoother pipeline interior. Additionally, there is a significant cost advantage to cleaning and lining over replacing mains.

Q: If cleaning removes tuberculation and restores flow, why bother with lining?
A: Cleaning does not remove the causes of corrosion or tuberculation. In a pipeline that has been cleaned and returned to service, corrosive influences go to work immediately at an accelerated rate. Cleaning followed by the application of a cement-mortar protects against the recurrence of corrosion and tuberculation.

Q: How are sections of pipe removed and replaced?
A: Access excavations are made approximately every 500 feet and at locations of pipe intersections. Pipe sections are cut for removal utilizing pipe saws. The removed pipe sections are cleaned and lined above ground and re-installed.

Q: How soon after lining can the pipeline be put back in service?
A: Service can usually be restored within 48 hours at operating pressure.

Q: Will there be open trenches at night?
A: No. The site must be left in a safe condition by the contractor and trenches will be protected with orange construction fence.

Q: Is the contractor penalized if the project is not completed on time?
A: Yes, there are provisions in the contract to ensure the project is completed in a timely manner.

Q: Will damage to my lawn be repaired?
A: Yes, lawn areas are graded and seeded and the contractor is responsible for proper regrowth.