Based on the latest information available, the boat ramp named Highway UU in Franklin County, Missouri is a concrete boat ramp that is open to the public. It is located at latitude 38.4264946 and longitude -91.04651642.

The boat ramp is approximately 40 feet wide and can accommodate various types of watercraft, including fishing boats, kayaks, canoes, and pontoons. However, there are no specific restrictions on the type of craft allowed on the water.

The ramp provides access to the Bourbeuse River, a popular destination for fishing and boating activities in Franklin County. The river is known for its scenic views and provides ample opportunities for anglers to catch smallmouth bass, catfish, and other species.

Overall, the Highway UU boat ramp is well-maintained and offers a convenient launch point for water enthusiasts in the area. However, it is always advisable to check for any updates or changes before heading out on the water.