MTE's Involvement
As part of our analysis, MTE was tasked with characterizing the bedrock aquifer and quantifying groundwater usage in the area. We identified several key groundwater-dependent features, including significant wetlands, creeks and streams, Areas of Natural and Scientific Interest (ANSIs), groundwater seeps and springs, the Niagara Escarpment, and numerous private wells.
A major concern was the potential hydraulic connection between the quarry and the Shouldice Wetland, a Provincially Significant Wetland located within 500 metres of the site. If a significant water-bearing fracture existed, quarry dewatering could create a cone of influence, drawing groundwater away from the wetland and threatening its ecological integrity.
MTE also assessed the potential impact on nearby private wells, many of which provide drinking water to local residents. If a hydraulic connection existed between these wells and the quarry through fractured bedrock, the dewatering process could lower water levels, reduce yields, or render wells inoperative.
Following extensive analysis, MTE developed an understanding of the groundwater system and proposed extraction strategies that would avoid negative impacts to both natural heritage features and local groundwater users. Our findings were presented as expert witness testimony before the Ontario Municipal Board (OMB) and the Environmental Review Tribunal (ERT). Based on this evidence, Harold Sutherland Construction was granted the license to proceed with the quarry expansion.