Office Public Works Arterial Drainage Channels

Man made arterial drainage channels to control water flow in rivers. The majority of arterial drainage maintenance works is on channel maintenance with the average channel requiring maintenance every four to six years. While this varies, with some channels requiring maintenance annually and others only requiring maintenance every twenty years, circa 2000 km of channels are maintained annually and nearly all of the 11,500 km of channels will have been maintained at least once over the Programme cycle of six years.