Based on the latest information available, the Joseph Avenue boat ramp in Baltimore, Maryland is a public boat ramp that provides access to Patapsco River and the Chesapeake Bay. It is approximately 14 feet wide and can accommodate various types of watercraft, including powerboats, sailboats, and kayaks.

This boat ramp is managed by the Maryland Department of Natural Resources and is open year-round, with a fee for launching. The facility also provides parking space for vehicles and boat trailers.

The Patapsco River is a tidal river located in central Maryland that flows into the Chesapeake Bay. It is a popular destination for boating, fishing, and other recreational activities. The Chesapeake Bay is a large estuary that spans Maryland, Virginia, and other nearby states, and is known for its diverse marine life and scenic beauty.

Overall, the Joseph Avenue boat ramp in Baltimore, Maryland is a convenient and accessible facility that provides easy access to two of Maryland's most popular waterways.