After conducting research, I was unable to find any information on a boat ramp named Forest Service Rd 212 in Tennessee or Kentucky with the given latitude and longitude coordinates. It is possible that the information provided is inaccurate or outdated. Without further information, it is impossible to determine the kind of boat ramp it may be, how wide it is, what body of water it services, or what kind of craft are permitted on the water. It is important to ensure the accuracy of information before making any assumptions or drawing conclusions.