The Northwest 12th Avenue Bascule Bridge is located just east of the Dolphin Expressway fixed bridge on the Miami River about three miles from the mouth at Brickel Point. The bridge has a closed vertical clearance of 17 feet with 85 feet of horizontal clearance at the center span. The bridge operates on a restricted schedule. The bridge is closed Monday through Friday, from 7:30 a.m. to 9 a.m., and from 4:30 to 6 p.m.. The bridge opens on demand at all other times.

Depending on schedule, the bridge can be opened by horn signal (one long, one short) or by hailing the bridge tender on VHF Channel 09. (All bridges in the state of Florida must be hailed on VHF Channel 09.)

Local Notices to Mariners are now exclusively available online from the U.S. Coast Guard.