Based on the latest information available, the boat ramp named Beaver Dam Lake - Waterworks Park in Wisconsin is a concrete boat ramp that provides access to Beaver Dam Lake. The ramp is reported to be approximately 20 feet wide, allowing for easy launching and retrieval of boats.

Beaver Dam Lake is a popular recreational destination in Wisconsin, covering an area of approximately 6,700 acres. The lake is known for its excellent fishing opportunities, with a variety of species including walleye, musky, and panfish. It is also a popular spot for boating and other water-based activities.

As for the types of craft permitted on the water, the Wisconsin Department of Natural Resources states that motorized boats of all kinds are allowed on Beaver Dam Lake, including pontoons, fishing boats, and personal watercraft. However, there may be certain restrictions on boat size and speed in certain areas of the lake, so boaters are advised to check the current regulations before setting out.

Overall, the Beaver Dam Lake - Waterworks Park boat ramp appears to be a well-maintained facility that provides easy access to one of Wisconsin's most popular recreational lakes.