work underway on a water-discharge structure we designed for poor soil conditions
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groundwater-inflow management assistance

groundwater-inflow management assistance
client
Lhoist North America
location
central Alabama

developing a grouting alternative to repair leak, improve safety, and address permitting requirements

Lhoist North America owns and operates quarries throughout North America and produces crushed limestone for a variety of products. When a leak in a dolomite mine pit in Alabama affected water inflow at a Lhoist limestone quarry, creating additional pumping costs, a potential pit flood-safety hazard, and threatening to impact a nearby creek, Barr was called to investigate.

Barr examined the inflow of karstic groundwater at estimated rates of 3,500 to 4,000 gallons per minute and evaluated alternatives for repair and grouting. Our field investigations included site reconnaissance, flow measurements, temperature and conductivity measurements, interconnections testing using artificial tracers, water sampling, creek staging, and survey of relevant project features.

We evaluated the effectiveness, constructability, risk, and relative cost of five potential remediation measures to mitigate the quarry water inflow. For Lhoist’s selected alternative, we are currently developing a cost estimate and preliminary design, which also addresses permitting required by the Alabama Department of Environmental Management and U.S. Army Corp of Engineers.