Based on available information, the MS 315 Scenic Panola County boat ramp is located in Mississippi, specifically in Panola County. It is a public boat ramp that provides access to a body of water that is likely the Tallahatchie River or one of its tributaries. The coordinates for the ramp are latitude: 34.41764069 and longitude: -89.80820465.

As for the size and specifications of the boat ramp, there is no exact information available. However, based on the name "scenic," it is possible that the ramp is designed to accommodate recreational watercraft, such as canoes, kayaks, and small boats.

In terms of the kind of craft permitted on the water, it is likely that the ramp allows non-motorized and low-powered watercraft. However, this information should be verified with local authorities.

It is important to note that the information provided is based on available public sources and should be verified with local authorities for accuracy and any updates that may have occurred.