An exemption is a small hydroelectric project having limited environmental impacts and meeting certain criteria so that it is exempt from licensing under Part I of […]

To completely remove or locally eliminate a species population from the facility’s affected area.

Water flows or turbulence that impede the ability of fish to locate an upstream or downstream fishway. False attraction flows can result from turbine discharge flows, […]

Animal species of a region or habitat.

Federal Energy Regulatory Commission – The independent federal agency in charge of regulation and oversight of interstate transmission of natural gas, oil, and electricity as well […]

The ability for fish to move safely and effectively upstream and downstream of an artificial obstruction.

A barrier installed to divert fish away from a canal or powerhouse intake or outlet.

The combination of elements (structures, facilities, devices, operations, and measures) necessary for movement of fish past a barrier.

Structural members of timber, concrete, or steel placed in channels or on the crest of a spillway to raise the reservoir water level but intended to […]

A gate to control flood releases from a reservoir.

Floodplain forests usually occur in the low, flood-prone areas along rivers, typically less than 20 feet above the river channel. They are often associated with oxbows […]

A floodplain is a generally flat area of land next to a river or stream.