Issue: 9/01 Three Weil-McLain 588 boilers are being used to heat the gift shop and concession area surrounding Mount Rushmore National Monument in Keystone, SD, while three more 888 boilers are housed in the energy plant and provide heat to the Park Ranger station. Two 578s are also being used to keep employees warm at the Mt. Rushmore dormitory, and two GVs heat the visitor's information center and restrooms.