After conducting research, I was unable to find specific information regarding the boat ramp named State Highway 82 in St. Clair County, Missouri. However, I can provide general information about boat ramps in the area based on official sources.

According to the Missouri Department of Conservation, there are several boat ramps in St. Clair County that provide access to the Osage River and Truman Lake. These ramps are generally open to all types of watercraft, including boats, canoes, and kayaks.

The width of the boat ramps in St. Clair County can vary depending on the specific location. However, the Missouri Department of Conservation recommends using caution when launching or retrieving a boat and to avoid blocking other vehicles or boats.

It is important to note that regulations and guidelines for boating can change over time. Therefore, it is recommended to check with official sources and local authorities for the latest information before using any boat ramp or waterbody.