The town of Cumberland faces a legacy of flooded, abandoned coal mines that once stood for industrial pollution. To tackle this, the community is using the steady temperatures of underground mine water as a geothermal resource. With heat pumps, the water now provides low-cost, near zero-emission heating and cooling for local buildings. This sustainable energy grid reduces utility costs, draws green businesses, and turns industrial ruins into a clean energy asset that respects the town’s history while protecting its future.