Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Mechums River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Mechums River, the highest being situated at an altitude of ft, the .
The Mechums River is a 25.5-mile-long (41.0 km) tributary of the South Fork of the Rivanna River in central Virginia in the United States. Via the Rivanna and James rivers, it is part of the watershed of Chesapeake Bay.