After conducting a search, I was unable to find any information on a boat ramp named Royce Dallman in Wisconsin with the given latitude and longitude coordinates. It is possible that the information provided may be incorrect or outdated.

In general, boat ramps can vary in size and design depending on the location and intended use. They can be made of concrete, asphalt, or other materials and may have features such as docks, parking areas, and restroom facilities.

The body of water that a boat ramp services can also vary. In Wisconsin, there are many lakes, rivers, and other bodies of water where boating is popular. Some popular boating destinations in Wisconsin include Lake Michigan, Lake Winnebago, and the Wisconsin River.

The kinds of crafts permitted on a body of water can depend on various factors such as the size of the body of water, the local regulations, and the type of craft. In general, boats, jet skis, kayaks, and canoes are common types of watercraft that may be permitted on Wisconsin waters. It is important to check local regulations and requirements before launching any watercraft.