After conducting research, I was unable to find any information specifically about a boat ramp named McMinn County in Tennessee. It is possible that the name of the boat ramp is different or that it is a lesser-known ramp without much information available online.

However, I can provide some general information about boat ramps in Tennessee. Boat ramps in Tennessee are managed by the Tennessee Wildlife Resources Agency (TWRA) and are typically open 24 hours a day. They vary in size and width, with some ramps accommodating larger boats and trailers.

The body of water that a boat ramp services can vary, as Tennessee has numerous lakes, rivers, and streams throughout the state. Some of the more popular bodies of water for recreational boating include Percy Priest Lake, Douglas Lake, and the Tennessee River.

The type of craft permitted on the water can also vary depending on the body of water and any specific regulations in place. Generally, most recreational boats are allowed on Tennessee's lakes and rivers, including jet skis, pontoons, and fishing boats. However, there may be restrictions on certain types of boats in certain areas, such as no-wake zones or areas reserved for kayaks and canoes.

Overall, while I was unable to find information specifically about a boat ramp named McMinn County in Tennessee, I hope this information about boat ramps in the state is helpful.