Based on the information available, Veto Road 2156 boat ramp is located in Prospect, Tennessee, with its latitude being 35.01350021 and longitude being -86.99526978. It is a public boat ramp that provides access to the Elk River, a popular destination for fishing and boating.

The boat ramp is said to be wide enough to accommodate a variety of boat sizes, but the specific width is not available. The ramp is reported to be in good condition and provides ample parking for vehicles and boat trailers.

As for the types of watercraft permitted on the Elk River, it is known to be suitable for small to medium-sized boats, kayaks, and canoes. The river has a slow-moving current and is generally calm, making it an ideal spot for recreational boating.

It is always important to verify the latest information on any boat ramp before using it. It is recommended to check with the local authorities or relevant websites to ensure the ramp's current condition and any restrictions or changes to its use.