Client project details

City of Rochester, NH (Groundwater Resource Development)

The Project

The City of Rochester is a medium-sized municipality located in southeastern New Hampshire. Based upon historical population growth rates, the City of Rochester anticipates that peak water use will meet or exceed 4.76 MGD by the year 2020. The safe yield of Rochester’s sole source of water supply (a surface water supply), however, was only 2.8 MGD. Therefore, the City of Rochester wished to develop and secure additional sources of water (and associated protection areas) to meet current and future water demands.

EGGI conducted a City-wide groundwater exploration program designed to develop groundwater supply wells within unconsolidated sand and gravel aquifers. This exploration program included numerous Phases including detailed geologic mapping, a contaminant threat assessment, geophysical surveys, exploratory drilling, pumping tests, water quality analyses, and numerical groundwater flow modeling.

Status/Results:

The results of this study led to the identification of 13 areas (Groundwater Development Zones) within the City where groundwater resources could potentially be developed. To date, three groundwater production wells have been developed within these Groundwater Development Zones.  Pending final permit approval by the State of New Hampshire Department of Environmental Services, each of the wells will provide up to 600 gpm (0.87 MGD) of groundwater resources to the City of Rochester, for a combined yield of up to 2.6 MGD.  A long-term wetland monitoring program was developed to enhance the protection of wetlands proximal to one of the production well sites.

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EGGI conducted a City-wide groundwater exploration program designed to develop groundwater supply wells within unconsolidated sand and gravel aquifers.

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P.O. Box 1578
56 Main Street
Meredith, NH 03253
T: (603) 279-4425
F: (603) 279-8717
eggi@eggi.com

“Data and research provide the underpinning for sound local water management decision-making that advances the well-being of the nation’s citizens, economy, and environment.”

- National Ground Water Association