For the river in New Zealand, see Collins River (New Zealand).The Collins River is a 67-mile-long (108 km) stream in the east-central portion of Middle Tennessee in the United States. It is a tributary of the Caney Fork, and is part of the Cumberland, Ohio and Mississippi watersheds. The river drains the scenic Savage Gulf area, located just below the river's source, and empties into Great Falls Lake at Rock Island State Park. The Collins River passes through Grundy and Warren counties. McMinnville, Altamont, Gruetli-Laager and Beersheba Springs are among the communities located within its watershed. The Savage Gulf section ... Source: Wikipedia