Squeaky Clean: Remote-Control led Dam Washer Gets the Job Done

摘要

Cleaning house takes on a different meaning at Tacoma Power's hydroelectric projects. In the past, when moss needed to be removed from the face of the dams, employees at the company's seven western Washington dams found themselves in a precarious position: hanging from a safety harness, being lowered down the side of a dam by ropes. Hovering hundreds of feet over water, they pointed a power washer at the wall, getting a face full of mossy backsplash as a result.