Client project details

Pembroke Quarry (Pembroke, NH – Groundwater Assessment)

The Project

EGGI was asked by the Town of Pembroke and City of Concord to evaluate if the expansion of an existing bedrock quarry would adversely impact existing groundwater supplies. Of particular concern is the potential for adverse impacts to occur to the City of Concord Water System’s public water supply wells which are located within a sand and gravel aquifer hydraulically down gradient of the proposed area for mineral extraction. The City uses the water supply wells to help meet periods of high potable water demands and as an emergency backup supply to other City water sources.

EGGI’s evaluation of potential impacts concentrated on the review of technical reports and other materials pertaining to the quarry expansion. Field inspections of the existing quarry and City well field were also performed. In addition, a review of the Alteration of Terrain Permit application required for the expansion was completed.


Status/Results:

EGGI evaluation provided valuable insights into potential hydraulic connections between the bedrock aquifer beneath the area of the quarry and the sand and gravel aquifer from which the City of Concord's groundwater resources are obtained.  EGGI’s hydrogeologic assessment and recommendations were instrumental to the development of Best Use Management Practices for future quarry operation.

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EGGI evaluation provided valuable insights into potential hydraulic connections between the bedrock aquifer beneath the area of the quarry and the sand and gravel aquifer from which the City of Concord's groundwater resources are obtained.

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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