Total streamflow across the Moreau River was last observed at 28 cfs, and is expected to yield approximately 55 acre-ft of water today; about 74% of normal. Average streamflow for this time of year is 38 cfs, with recent peaks last observed on 2017-05-01 when daily discharge volume was observed at 32,710 cfs.

Maximum discharge along the river is currently at the Moreau River Near Jefferson City reporting a streamflow rate of 47.3 cfs. However, the streamgauge with the highest stage along the river is the Moreau R Near Whitehorse Sd with a gauge stage of 1.84 ft. This river is monitored from 3 different streamgauging stations along the Moreau River, the highest being situated at an altitude of 2,248 ft, the Moreau R Near Faith Sd.

The Moreau River is a 200-mile-long tributary of the Missouri River that runs through Wyoming and South Dakota. It was named after Jean-Baptiste Moreau, an early French fur trader. The river's hydrology is dominated by snowmelt and summer rainfall, with peak flows occurring in May and June. The Moreau River is home to several dams, including the Shadehill Dam and Reservoir, which were built in the 1940s for flood control and water conservation purposes. The reservoir also serves as a popular recreational destination for fishing, boating, and camping. The river is also used for agricultural purposes, with irrigation canals diverting water to nearby farmland. The Moreau River has a rich history, with evidence of human habitation dating back over 10,000 years. Today, it remains an important resource for both people and wildlife in the region.