Based on my research, there doesn't seem to be any information available about a boat ramp named Charlene Street Billings in Montana. It's possible that the name is incorrect or that the boat ramp has been renamed or no longer exists.

Without accurate information, I cannot provide details about the kind of boat ramp it is, how wide it is, what body of water it services, or what kind of craft are permitted on the water. However, I can suggest that if you are looking for information about a specific boat ramp in Montana, you can try contacting local authorities or organizations such as the Montana Fish, Wildlife, and Parks department or local boating associations for more information.