EP is working with the Town to develop water supply alternatives to maximize the Town’s allowable groundwater withdrawal volumes while maintaining the high-quality water historically supplied to the Town. EP conducted a desktop evaluation of potential public water supply sites for the Town and identified two potential new source water supply sites.

As is the situation with many municipalities, new source exploration is complex, not only drilling and testing but groundwater modeling to evaluate potential impacts to water quality due to contaminant migration from nearby sources and potential pumping impacts to surface water. In addition to navigating these complexities, EP prioritizes coordination with regulators and stakeholders as an important part of the new source process and is coordinating all activities in advance with MassDEP.

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Radial collector well systems consist of horizontal radial wells used to extract water from an aquifer with induced infiltration from a surface water source like a river or lake. Under proper conditions radial collector wells can pump large quantities of water efficiently and economically and filtration through the bottom sediments can improve water quality relative to a traditional intake structure.

To evaluate the feasibility of a radial collector well system beneath the Merrimack River, a series of borings were installed to characterize subsurface hydrogeology and evaluate the horizontal and vertical extent of aquifer material.

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EP is working with the Town of Foxborough to evaluate water supply alternatives at their Witch Pond site. Witch Pond is an Atlantic White Cedar Swamp and NHESP Habitat for Rare Wildlife and Habitat of Rare Species. Several water supply sources are located near the Witch Pond Complex, including Foxborough, Mansfield and Attleboro.

EP, with McLane Environmental, developed a groundwater model which was used to determine the optimal pumping scenarios at the Foxborough wellfield to minimize impacts to the Witch Pond Complex. Model results document the complex hydrogeologic conditions, competing issues, and need for an Integrated Management Plan for wellfield pumping near Witch Pond.

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