Summary
Firstly, the coordinates given (latitude: 35.3681488, longitude: -90.07672882) point to a location in Tennessee, not Illinois.
Additionally, without a specific town or county name, it is impossible to verify if a boat ramp named "River Road" exists in Shelby County, Illinois.
Therefore, no accurate information can be provided on the type of boat ramp, width, body of water, or permitted watercraft.
River Road Shelby County