.

I apologize, but there seems to be a mistake in your question. The Whitewater River flows through Minnesota, not Illinois. Therefore, I will provide information on the Whitewater River run in Minnesota.

The ideal streamflow range for the Whitewater River run in Minnesota is between 150-1000 cubic feet per second (cfs). The river is rated as a Class II-III, with some sections reaching Class IV during high water. The segment mileage for the run from the BWCWA Boundary to Forest Boundary in T62N, R2E is approximately 17 miles.

The Whitewater River run is known for its challenging rapids and obstacles, including Swirling Hole, the “Esses,” and the Drop and Fall. The Swirling Hole, located about 1.5 miles into the run, is a Class III rapid with a large hydraulic that can trap boaters who don't navigate it successfully. The “Esses” are a series of rapids that require careful maneuvering to avoid rocks and other obstacles. The Drop and Fall is a Class IV rapid with a steep drop that requires expert boating skills.

Specific regulations apply to the Whitewater River run, including a permit system that limits the number of paddlers per day. Paddlers must also have a personal flotation device (PFD) and follow Leave No Trace principles. Additionally, motorized watercraft are not allowed on the river.