The area of a waterbody closest to the shore in which sunlight can reach sediment, supporting growth of aquatic flora.

Power generation is adjusted throughout a day in response to demand for electricity.

Angled bar racks and louvers are used to direct fish toward bypasses and sluiceways at hydropower plants. These structural guidance systems are devices that do not […]

A dam constructed mainly of stone, brick, or concrete blocks pointed with mortar. A dam having only a masonry facing should not be referred to as […]

The minimum flow that must be released from a project in order to meet environmental or other non-power water requirements. Flows are released either to a […]

Memorandum of Agreement – a document written between parties to cooperatively work together on an agreed upon project or meet an agreed upon objective.

Memorandum of Understanding – a document describing a bilateral agreement between parties.

A buttress dam comprised of a series of arches for the upstream face.

NGVD – A vertical datum is a surface of zero elevation to which heights of various points are referenced. The NVGD of 1929 was utilized until […]

The National Register of Historic Places is the official list of the Nation’s historic places worthy of preservation. Authorized by the National Historic Preservation Act of […]

Nature-like fishways mimic natural side channels and are placed next to migration barriers. They include a wide variety of designs such as step‐pools, roughened ramps, rock‐arch […]

National Geodetic Vertical Datum – A vertical datum is a surface of zero elevation to which heights of various points are referenced. The NVGD of 1929 […]