projects

Granville Pipeline Replacement and Hydroturbine Installation

Westfield, Massachusetts

Client: Town of Westfield, Massachusetts

Services

  • Bidding Assistance
  • Construction Administration
  • Design
  • Feasibility Study
  • Funding Assistance
  • Hydraulic Analysis
  • Permitting
  • Pipeline Condition Testing

Project Summary

The City of Westfield, Massachusetts with a population of about 40,000 lies in the foothills of the Berkshire Mountains. In 1898, a water supply consisting of a small reservoir and pipeline was built where water would flow by gravity to the City. In the 1930’s, a larger reservoir, the Granville Reservoir (photo at right), was built upstream. In the mid 1990’s a filter plant was built to treat the water which by then represented about 40% of the City’s supply capacity. At that time, the original transmission pipeline was replaced except for about of mile that runs through a scenic gorge mostly inaccessible to modern construction equipment.

Currently, the City is replacing of this older portion of the raw water transmission pipeline running through the gorge. The pipeline is being replaced by a combination of trenchless technology methods and open-cut construction. The pipeline is also being enlarged to restore the original flow capacity and provide excess hydraulic head to power a new hydroturbine located in the basement of the filter plant. It will produce about 37 kW roughly equaling the power consumption of the plant. The projected payback is 15 years and net economic benefit to the City over the next 40 years is $7 million.

The project is under construction with an expected completion in early 2014.

 

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