Based on the available information, the boat ramp named Lafayette County is located at latitude: 38.93914795 and longitude: -93.58270264 in Missouri. It is unclear what type of boat ramp it is or how wide it is, as this information is not readily available online.

However, it is known that the boat ramp services the body of water known as the Lake of the Ozarks, which is a popular recreational lake in central Missouri. The Lake of the Ozarks covers more than 54,000 acres and has over 1,150 miles of shoreline.

As for the type of craft permitted on the water, it is likely that the boat ramp at Lafayette County allows a variety of watercraft, including motorboats, sailboats, kayaks, canoes, and other types of personal watercraft. However, specific regulations may vary depending on the location and the time of year, so it is important to check with local authorities or the Missouri Department of Conservation for the latest information.

In conclusion, while some information about the Lafayette County boat ramp is available, more research would be needed to determine the exact type and width of the ramp. However, it is clear that the ramp services the Lake of the Ozarks and likely allows a variety of watercraft.