Flow control structure

This includes weirs, flow splitters and proprietary-design devices that are used for stormwater management and in combined sewers.

Structures like this required yearly maintenance to remove the accumulated silt.

In Hawaii, there are numerous flow-control structures that have been built to irrigate the pineapple and sugar cane fields.

When over full, they dump excess water back into either streams or other canals.

Among the simplest is a low dam across a shallow stream, forcing all of the water to one side to allow it to be easily collected in a canal.