A dam gate designed to control flow through large waterway openings. They may be designed as either upward or downward (skimmer) opening. A roller or fixed […]

An inflatable structure affixed to a dam crest used to manage impoundment levels.

A stone masonry dam in which the stones are unshaped or uncoursed.

A mathematical curve or family of curves indicating how a reservoir is to be operated under specific conditions to obtain best or predetermined results. Rule curves […]

A mode of hydropower operation where the outflow from a project matches the inflow to the impoundment. on an instantaneous, hourly, or other time basis.

The rotating part of the turbine that converts the energy of falling water into mechanical energy. The rotating shaft connects to an electrical generator.

A subsidiary dam of any type constructed across a saddle or low point on the perimeter of a reservoir.

Water contact is limited to the limbs, no ingestion of water. Boating, fishing, etc.

Section 106 of the National Historic Preservation Act of 1966 requires federal agencies to consider the effects on historic properties of projects they carry out, assist, […]