Spiral.

A dam constructed of concrete and/or masonry on the outside but having a hollow interior and relying on its weight for stability.

An earth dam constructed of materials, often dredged, which are conveyed and placed by suspension in flowing water.

The physical contact of a fish with an intake structure (such as a trash rack or fish screen) due to water velocities that are too high […]

A body of water created by erecting a barrier to flow, e.g., dam and diversion structures. Typically used in reference to run-of-river facilities.

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

The rate or volume of water that flows into a reservoir or forebay during a specified period.

A science-based habitat evaluation technique that is a quantitative environmental assessment procedure that describes how habitat quantity and quality change over a range of physical conditions, […]

Water volumes and levels in a stream needed to support aquatic life, water quality, consumptive uses or recreation, synonymous with other commonly used terms such as […]

The structure leading to a conduit/penstock. Can be integral to the powerhouse to divert water to the turbines.

A Kaplan turbine is a reaction propeller-type turbine which generates power from the combined forces of pressure and moving water. A runner is placed directly in […]

Uncontrolled loss of water by flow through a hole or crack in a dam or diversion structure, or through flashboards.