According to the latest information available, the boat ramp named Beach Boulevard 9540 is located in Jacksonville, Florida, at latitude 30.28712082 and longitude -81.56967163. It is a concrete boat ramp that provides access to the St. Johns River.

The boat ramp is approximately 25 feet wide and has a gradual slope, which makes it suitable for most small and mid-sized watercraft. However, it may not be ideal for larger boats or vessels that require deeper water for launching.

The St. Johns River is a popular destination for boating, fishing, and other recreational activities. It spans over 300 miles and is one of the longest rivers in Florida. The river is known for its diverse wildlife, including manatees, dolphins, and various species of fish.

As far as the kind of craft permitted on the water, it varies depending on the location and specific regulations. However, in general, the St. Johns River allows for a wide range of watercraft, including motorboats, sailboats, kayaks, canoes, and other types of vessels.

In summary, Beach Boulevard 9540 boat ramp is a concrete boat ramp located in Jacksonville, Florida. It is approximately 25 feet wide and provides access to the St. Johns River, which is a popular destination for boating and fishing. The ramp is suitable for most small and mid-sized watercraft, and the river allows for a wide range of vessels.