Moosup is derived from the Native American word Maussup, a Narragansett sachem.
The area of the Moosup River watershed is 57,017 acres. The river begins in Foster, Rhode Island and flows into the Quinebaug River in Plainfield. Tributaries of the Moosup River include West Meadow Brook, Bucks Horn Brook, Ekonk Brook, Roaring Brook, Vaughn Brook, Quanduck Brook and Angell Brook.
The Moosup River is undergoing flow restoration efforts. In June 2014, Moosup Dam #1 was removed and in September 2015 the Griswold Rubber dam was removed. Additional dam removals are being planned.
The Thames River Basin Partnership featured the flow restoration efforts in the Moosup River during the 2018 Floating Workshop focused on River Continuity.
Documents related to water quality in the Natchaug River watershed include:
Ekonk Brook Watershed Based Plan