Terminology

Check Structure – Typically a concrete structure that crosses a stream or a canal that dams or backs up the water to divert the water into another channel, canal or reservoir. Often these structures will have water control gates that can be opened or closed to change the depth of the water behind the structure.

Gated Structure – Typically a concrete structure in a stream, canal or reservoir that houses water control gates used to regulate the flow of water into and through the structure, diverting water in one or more different directions.

Spillway -Typically a concrete channel placed on the steep slope of a dam or similar structure where water is released through it and controlled so as to safely move the water and dissipate the energy of the water when flowing down hill.

Gravity Water Control Structure – Typically a concrete structure used to direct the flow of water in a stream, canal or reservoir where the water flows through it by gravity.

Pumping Plant – Typically a concrete structure where water is controlled and brought into the structure to where it is pumped up and raised in elevation an/or in pressure by a pump driven by an electric, gas or diesel motor.

On-Peak Period – The period during the day when electrical power is in the greatest demand, typically from 1 p.m. until 8 p.m. Exact times vary by season.

Off-Peak Period – The period during the day when electrical power is in less demand, typically from 8 p.m. until 1 p.m. the following day. Exact times vary by season.