The Private Bridge to Highway 55 segment of the Whitewater River in Illinois is a popular destination for kayakers and rafters. The ideal streamflow range for this stretch of the river is between 200-500 cubic feet per second (cfs) for optimal conditions. The segment is rated as Class II-III whitewater, with some areas reaching Class IV during high water.

The total distance of this segment is approximately 6 miles, with several notable rapids and obstacles along the way. The first rapid, known as "The Inflatable Slide," is a Class III rapid featuring a steep drop followed by a large wave train. Another challenging rapid is "The S-Turn," a Class IV drop with tight turns and large holes.

It is important for kayakers and rafters to note that this section of the Whitewater River is private property, and access to the river is only granted with permission from the landowner. Additionally, all watercraft must be registered with the state of Illinois and follow regulations set forth by the Illinois Department of Natural Resources.

Overall, the Private Bridge to Highway 55 segment of the Whitewater River offers exciting rapids and challenging obstacles for experienced kayakers and rafters, but it is important to respect private property rights and follow all regulations to ensure a safe and enjoyable experience.