Unfortunately, there seems to be some confusion with the provided coordinates as they are not in Alabama, but rather in Kentucky. Therefore, it is not possible to provide accurate information about the boat ramp named Aurora Highway Marshall County in Alabama.

However, in general, boat ramps can vary in size and capacity depending on the location and intended use. Some ramps may be suitable for smaller boats such as canoes and kayaks, while others may be able to accommodate larger vessels such as speedboats and yachts. The width of a boat ramp can also vary, with some ramps being wider to allow for multiple boats to launch at once.

The body of water that a boat ramp services can also impact the types of boats that are permitted. Some bodies of water may have restrictions on boat size or motor type, while others may allow for a variety of watercraft. It is important to check with local authorities and regulations before launching any type of boat.

In conclusion, accurate information about the Aurora Highway Marshall County boat ramp in Alabama could not be provided due to incorrect coordinates. However, boat ramps can vary in size and capacity, and the types of boats permitted can depend on the body of water and local regulations.