Based on the latest available information, the boat ramp named Powhatan State Park Road is located in Powhatan County, Virginia. It is a public boat ramp that provides access to the James River. The latitude of the boat ramp is 37.69178391, and the longitude is -77.91944885.

The boat ramp is known to be a concrete ramp that is approximately 12 feet wide. It has a gentle slope, making it easy to launch small to medium-sized watercraft. There is also a parking lot nearby, which can accommodate up to 50 vehicles and boat trailers.

As for the kind of craft that are permitted on the water, the James River is suitable for a wide range of watercraft, including canoes, kayaks, sailboats, and motorboats. However, it is important to note that there may be certain restrictions based on the water level and weather conditions. Therefore, it is advisable to check with the Powhatan State Park officials before embarking on any water activities.

In summary, the Powhatan State Park Road boat ramp is a public concrete ramp that is approximately 12 feet wide. It provides access to the James River in Virginia and can accommodate various watercraft, including canoes, kayaks, sailboats, and motorboats.