Last Updated: 04/05/2017
Madison Water Utility will be rehabilitating the existing 6-in water main on Major Ave. between Davidson St. and E Lakeview Ave. This project will be utilizing structural cured-in-place pipe (CIPP) lining technology. This process will allow us to essentially construct a new pipe inside of the existing deteriorated main with minimal excavation and disturbance. Unlike other pipe lining methods, the structural CIPP liner is designed to meet the physical strength properties of a brand new pipe. Fer Pal Construction has been awarded the Contract for this work and will be working with Madison Water Utility on site.
To accommodate construction, the existing water main must be taken out of service and all customers will be provided water service through an above-ground temporary drinking water system. The system is disinfected, sampled and tested using the same procedures as a new main installation. While being served by the bypass system, each property will have their existing water meter removed for the duration of the project. When the rehabilitation work is complete, the meters will be reinstalled and upgraded to the new wireless/smart metering system (Project H20). Both the meter removal and reinstall/upgrade work will require appointments to be made with Madison Water Utility and/or Fer Pal Construction.
Construction is scheduled to begin the week of September 24th and it should be completed by mid-November.
Frequently Asked Questions:
Why not install a new water main instead of rehabilitating the existing one?
Traditionally, excavating a trench and installing a new water main is the most cost-effective solution for a pipeline replacement. Most water main replacements are coordinated with other utility work or street resurfacing projects so the costs can be shared. In circumstances like Droster Road., the existing water main is in need of replacement even though the other utilities and the street surface aren’t. CIPP becomes a viable alternative in this case, or other cases such as socially or environmentally sensitive areas, and time critical situations.
Is CIPP as good as traditional pipe replacement materials?
The fully-structural CIPP pipe is held to the same WI-DNR pipe requirements as any other material. It is designed to withstand a constant working pressure of 100-psi for 50-years with a factor of safety of 2.5 – which is based on the CIPP as a stand-alone pipe, not relying on any remaining integrity of the host pipe it is contained within.
What is involved in CIPP process?
The CIPP pipe itself consists of two polyester layers and a durable water-tight surface layer. The polyester tubes are filled with a liquid epoxy resin. The resin-saturated tube is installed inside the existing water main between two small excavations at each end of the pipe segment. The tube is pressurized to form tight against the existing pipe-walls and heat is applied to solidify the resin as a new pipe.
After the pipe is installed, service connections are reinstated from within the pipeline using a small robotic drilling system. The CIPP project will be subjected to the same water pressure and water quality testing requirements that any new pipe system would have.
Are CIPP systems safe for drinking water?
All CIPP systems for use in drinking water systems must be certified by the National Sanitation Foundation (NSF) Standard 61: Drinking Water System Components – Health Effects, which is the standard required by the Wisconsin Department of Natural Resources. The NSF 61 standard tests for the presence of regulated substances set by the Environmental Protection Agency (EPA) Safe Drinking Water Act, and to be certified no substance may exceed 10% of the EPA’s maximum contaminant level.
To view the NSF 61 certification letter for the Aquapipe CIPP system used in the Droster Rd project, click here.
Will I still have water service during construction?
Before construction begins, customers will be provided constant water service through a temporary, above-ground water main. The temporary main will be constructed entirely from NSF 61 drinking water components and it will be disinfected and tested prior to providing service. The temporary main is connected to the house at an exterior hose bib.
What can I expect during construction?
Construction activities will begin in early October and finish in about one month. The contractor may work between the hours of 7:00 AM and 7:00 PM, Monday through Saturday. Droster Rd. will be open to traffic, however there will be several small excavations, and the temporary main will be ramped where it crosses traffic or driveways.