Unfortunately, the coordinates provided (latitude: 30.81300163, longitude: -88.73215485) do not correspond to a location in Illinois. These coordinates are actually located in Mississippi, near the city of Lucedale. Therefore, it is not possible to provide information about a boat ramp named George County in Illinois.

However, in general, boat ramps serve as a launch site for boats and other watercraft to enter a body of water. Boat ramps can vary in size and width depending on the location and the level of use. The type of craft that are permitted on the water can also vary depending on the regulations set by the local authorities. It is important to check the latest information and regulations before using a boat ramp to ensure compliance and safety.