Physically, a municipal drain is simply a drainage system. 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. Even some creeks and small rivers are now considered to be municipal drains. Municipal drains are primarily located in rural agricultural areas of the province.
Ontario Ministry of Agriculture Website
Description of a Municipal Drain and the purpose.
Redfern and Big Bay Point Municipal Drain
South Innisfil Drain