Abstract: A drainage device is provided. The device includes a novel floating surface drain or skimmer to manage draining of liquid, such as draining of water from stormwater impoundment ponds or structures.

Abstract: The apparatus of the invention has a float portion, a drain head portion, and an outlet pipe portion which are sequentially connected. The float pivotally supports the drain head slightly below the surface of water in a sediment basin. The outlet pipe is connected rigidly to the drain head at the inlet end and flexibly to a drain line at the outlet end. As the water fills and is drained from the sediment basin, the float and drain head are gradually raised and lowered and the outlet pipe approaches horizontal. The float surrounds the drain head and has a debris guard which is pivotally mounted to keep a gap preventing debris from entering the outlet pipe closed. An orifice within the outlet pipe and an air vent connected thereto are variable to control the water flow rate from the basin.