Monitoring Hydroelectric Dam Sumps - Brochure

The Situation

Hydroelectric clams produce electric power by harnessing the force of the water flowing through the dam. There are numerous sources for oil spillage:

• The hydroelectric turbines are lubricated by lubrication oils.
• The very large water control valves are normally hydraulic powered and are lubricated with various greases and oils.
• Vehicles including fork lifts, trucks, etc., can spill oils and fuels.

Any accidental spillage of oil or grease or intentional wash down water containing minor amounts of oils, greases, and detergents must be collected and treated before discharge to the river. These fluids along with any water leaks are collected in sumps in the dam and are regularly pumped out. In many cases, the volume of water is substantial.