Total streamflow across the Flatrock River was last observed at 1,121 cfs, and is expected to yield approximately 2,223 acre-ft of water today; about 96% of normal. Average streamflow for this time of year is 1,167 cfs, with recent peaks last observed on 2025-04-06 when daily discharge volume was observed at 30,300 cfs.

Maximum discharge along the river is currently at the Flatrock River At Columbus reporting a streamflow rate of 804 cfs. This is also the highest stage along the Flatrock River, with a gauge stage of 4.73 ft at this location. This river is monitored from 2 different streamgauging stations along the Flatrock River, the highest being situated at an altitude of 781 ft, the Flatrock River At St. Paul.

The Flatrock River is a major waterway in central Indiana, stretching for 60 miles from Henry County to Bartholomew County. It has a rich history, with Native American tribes and European settlers using it for transportation and fishing. Today, the river is primarily used for recreational activities like kayaking, fishing, and camping. The river is also an important source of water for agriculture in the area. There are several dams and reservoirs along the river, including the Cataract Dam, which was erected in 1927 to provide hydroelectric power to nearby communities. In recent years, there has been concern about water quality in the Flatrock River due to agricultural runoff and other pollution sources. Efforts are underway to protect the river and ensure it remains a valuable resource for generations to come.