Penstock

[2] The term is also used in irrigation dams to refer to the channels leading to and from high-pressure sluice gates.

The penstock is usually situated fairly close to the center of the tailings dam and built up using penstock rings, short reinforced ring-like sections of pipe which nest one within the other when stacked and thereby control the water level, letting the slimes settle out of the water.

[4] Penstocks are incorporated into the surface water management systems (drainage) of many landfill sites.

Retention basins are constructed in order to store storm water, limiting the discharge from the site to its pre-development rate.

Valved penstocks are installed at the outfall of the basin to isolate potentially contaminated surface waters from discharging into a main watercourse.