Lafayette Road Water Main Replacement Project

Project Scope

  • Replacing 1,400-ft of 67-year-old, 6-in and 8-inch diameter, cast iron water main on Lafayette Road between High Street and Winnacunnet Road (Project Map)
  • Installing new 12-inch diameter, ductile iron water main
  • The new main will be installed and put into service, then existing service pipes will be transferred to new main, and the old main taken out of service.
    • Interruptions of water service for any individual service will be only for a few short hours when the service pipe is transferred from the old water main to the new water main.
  • Construction started on May 15, and is expected to completed by Labor Day.
  • Construction is scheduled for the hours between 10 p.m. and 6 a.m.
  • Traffic will be detoured around the construction zone (Traffic Management Plan)
    • During construction, the north bound lane will remain open for traffic.
    • South bound traffic will be detoured east on High Street, south on Academy Avenue, then west on Winnacunnet Road back to Lafayette Road.

Project Rationale

  • Aquarion schedules main replacement projects every year as part of its infrastructure renewal program to ensure the long-term reliability of the water system.
  • In addition to being an old, undersized water main, this project is being done in conjunction with a Town of Hampton sewer replacement project scheduled for later this year.
  • The existing water main lies too close to the sewer by modern underground utility standards, which creates risk for breaks and service interruptions during sewer construction, and increases the complexity and cost of the sewer main project
  • Phase 1 of the Experience Hampton initiative to enhance the appearance and attractiveness of the center of Hampton.
    • After the water and sewer projects are completed, proposed storm drainage, other utility and street-scaping improvements will result in a fresh new look to the town center. New utilities will minimize need for excavation for decades to come.

Project Updates

  • May 19 – construction crews made exploratory test pits in Lafayette Road to accurately locate the underground positions of storm drains, sewers and natural gas mains, and to assess soil conditions.
  • June 2 – progress has been slow due to rainy weather. The new main was tapped into the existing main at the Lafayette Road / Winnacunnet Road intersection. Next new water main will be installed working northward from this point.
  • June 9 – 200 feet of new main was installed this week.
  • June 19 – 686 feet of new main has been installed.
  • June 30 – 1,230 feet of new main has been installed.  Work has been suspended for the Independence Day week and will resume Sunday night, July 9.
  • July 14 – 1,405 feet of new main has been installed. The final 80 feet will be installed next week, then the new pipe will be tested for pressure and bacteria. Once these tests have passed, existing water services will be moved from the old main to the new main.
  • July 28 – All 1,500 feet of new main has been installed, passed pressure and bacteria tests and been placed into service. Three water service lines have been moved to the new water main.
  • August 4 – The existing water main on Swain Court was connected to the new main on Lafayette Road. Seven water service lines were moved to the new water main.
  • August 28 – Relocation of water service lines new water main has been completed.  The old main will be taken out of service this week.  Final paving is being coordinated with the Town’s sewer work to be conducted later this fall.
  • September 1
    All construction work is complete.  The new water main is in service, all water service lines have been transferred to the new water main, and the old water main has been shut off.
    Cleanup and pavement patching will be conducted during the week of September 4
    Additional paving will be done after the Town of Hampton’s sewer project is completed later this fall.