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

The South Anna River is a tributary of the Pamunkey River in Virginia, spanning a length of approximately 54 miles. Historically, the river played a significant role in transportation and commerce during the colonial period. Today, the river is utilized for recreational purposes such as fishing, kayaking, and boating. The river's hydrology is affected by various dams and reservoirs, including the Lake Anna Reservoir and the Dominion North Anna Power Station. The Lake Anna Reservoir serves as a source of drinking water, as well as a popular destination for recreational activities. Additionally, the Dominion North Anna Power Station is a nuclear power plant that utilizes the river as a cooling water source. The South Anna River also supports agricultural activities, particularly in the lower reaches of the river.