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

The Long Prairie River is a 109-mile-long tributary of the Mississippi River in Minnesota. It flows through a mix of agricultural land and forests, and has played an important role in the region's history. Native American tribes used the river for transportation and fishing, while European settlers used it to power mills and irrigate crops. Today, the river is used for recreational activities such as fishing, canoeing, and camping. The river is also home to several reservoirs and dams, including the Lake Carlos Dam and the Lake Emily Dam, which help regulate the river's flow and provide water for irrigation. Despite its importance to the region, the Long Prairie River faces threats from pollution and habitat destruction, and efforts are underway to protect and restore the river's ecosystem.