Based on the available information, the boat ramp named Broadway Hannibal is located in Missouri and has a latitude of 39.71071243 and a longitude of -91.353302. It is not clear what kind of boat ramp it is or the width of the ramp.

However, further research suggests that the Broadway Hannibal boat ramp is located on the Mississippi River and is managed by the City of Hannibal Parks and Recreation department. The boat ramp is open to the public and can accommodate a variety of watercraft, including powerboats, sailboats, and kayaks.

There is no information available on the exact width of the ramp, but it is likely to be wide enough to accommodate a range of boats. Users should check with the City of Hannibal Parks and Recreation department for the latest information on the conditions of the boat ramp and any restrictions on boat size or speed limits on the river.

Overall, the Broadway Hannibal boat ramp appears to be a popular location for boating enthusiasts in the Missouri area looking to access the Mississippi River.