There are 18 hydroelectric generators at the Hoover Dam. These generators tend to build up with grease, dirt and oil with use.

Power Generation professionals know that one key to peak performance is clean electrical equipment. The demand to keep the equipment running often leads to deferred cleaning and maintenance, reduced efficiency, and in some cases, outages caused by flashover.

Nuclear equipment proves a unique challenge to clean. High levels of contamination have previously required significant downtime and hazards to employees.

A Pacific Gas & Electric (PG&E) hydroelectric generator in California had been out of service for several years.