Moser Channel is the deepest passage spanned by the Seven Mile Bridge

Seven Mile Bridge

The Seven Mile Bridge is a famous bridge in the Florida Keys, in Monroe County, Florida, United States. It connects Knight's Key in the Middle Keys to Little Duck Key in the Lower Keys...

 and is one of four predominant passages in the Florida Keys which allow exchange of waters to the north and west of the Keys (including Florida Bay and the Gulf of Mexico) with the Atlantic waters of Hawk Channel and the Florida Reef to the south and east. Moser Channel encompasses the deepest section of the passage at 7-Mile Bridge and has an orientation perpendicular to the bridge. The other three Keys passages important to the exchange of south Florida coastal waters are Long Key Channel, Channel 5, and Channel 2.