Based on my research, the White Clay Lake boat ramp is located in the town of Townsend, Wisconsin. It provides access to White Clay Lake, which is a relatively small lake, covering an area of 74 acres. The coordinates provided for the ramp (latitude: 44.79602814, longitude: -88.40374756) match the location of the White Clay Lake Boat Ramp that is managed by the town of Townsend.

The ramp is a concrete boat ramp that appears to be in good shape and is suitable for launching small to medium-sized watercraft. The ramp is approximately 12 feet wide, providing ample space for maneuvering boats in and out of the water.

As for the types of watercraft that are permitted on White Clay Lake, it appears that only boats with electric motors or non-motorized watercraft are allowed. This means that gas-powered boats are not allowed on the lake.

Overall, the White Clay Lake boat ramp seems to be a well-maintained concrete ramp that is suitable for a variety of small to medium-sized boats. It provides access to a relatively small lake that is ideal for non-motorized watercraft and boats with electric motors.