Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Collins River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Collins River, the highest being situated at an altitude of ft, the .

The Collins River is a 67-mile-long tributary of the Caney Fork River in Tennessee. The river was named after Isaac Collins, who settled on its banks in the early 19th century. The river flows through rural areas and several small towns, including McMinnville and Rock Island. The hydrology of the river includes several tributaries, including Rocky River and Cane Creek. The Collins River is home to several dams and reservoirs, including the Great Falls Dam and the Rock Island Dam. These reservoirs provide hydroelectric power, flood control, and recreation opportunities for fishing, boating, and swimming. The river also supports local agriculture, particularly in the form of livestock grazing and crop irrigation. The Collins River is an important resource for the local community and a popular destination for outdoor enthusiasts.