Top Discharges

Streamgauges reporting the most discharge on the Mazon River

10 Day Trend

Discharge comparison for the highest gauges over the past 10 days

Expected Streamflow Ranges

Streamflow discharge range for this time of year

The Mazon River or Mazon Creek (), is a tributary of the Illinois River in the United States. The confluence is near Morris, Illinois.The Mazon River is associated with the Mazon Creek fossils of the Francis Creek Shale, which are also exposed in strip mines and quarries near the River. This fossil bed includes well-preserved fossils from the Pennsylvanian period of the Paleozoic era and is a world-famous Lagerst├Ątten site. The Mazon River is approximately 28 miles (45 km) in length, with the West Fork considered the main branch. The river was named in honor of William Mason, a pioneer ... Source: Wikipedia