Description
The National Park Service is seeking a contractor to replace components on propane tanks located at Mount Rushmore National Memorial. The work includes replacing the existing buried impressed current anodes and insulated wiring, as well as the inoperable rectifier. The contractor will also need to install dielectric unions between the underground liquid services and above-ground equipment to isolate the vaporizer from the rectifier system. Additionally, the vaporizer first-stage outlet regulator will need to be replaced. The contractor may need to supply propane vapor to the facility during vaporizer replacement using temporary service or hoses, depending on the weather conditions.
• Replacement of buried impressed current anodes and insulated wiring
• Replacement of the inoperable rectifier
• Installation of dielectric unions between underground liquid services and above-ground equipment
• Replacement of the vaporizer first-stage outlet regulator
• Possible temporary propane vapor supply during replacement