A municipal drain is a system to move water. It is created pursuant to a bylaw passed by the local municipality. The municipality is responsible for the construction of the drainage system and future maintenance and repair. Costs may be recovered from the property owners in the watershed of the drain.
Municipal drains are identified by a municipal bylaw that adopts an engineer's report. These reports contain plans, profiles and specifications defining the location, size and depth of the drain, and how costs are shared among property owners.
Most municipal drains are either ditches or closed systems, such as pipes or tiles buried in the ground. They can also include structures such as dykes or berms, pumping stations, buffer strips, grassed waterways, storm water detention ponds, culverts and bridges. Some creeks and small rivers are now considered to be municipal drains. Municipal drains are primarily located in rural agricultural areas and should not be confused with storm sewers found primarily in urban areas.