Water front Development proposal for The Cooum river (also known as Thiruvallikenni river) is one of the shortest classified rivers draining into the Bay of Bengal. This river is about 72 km in length, flowing 32 km in the city of Chennai (urban part) and the rest in rural part. The river is highly polluted in the urban area (Chennai). Along with the Adyar River running parallel to the south and the Kosasthalaiyar River, the river trifurcates the city of Chennai and separates Northern Chennai from Central Chennai.
