![]() If your vessel is equipped with a two-way radio, please establish contact with the lock on VHF (FM) Channel 14. Radio: Is the preferred method of making contact with the lock on the Upper Mississippi River.There are several methods of communication with the lock personnel, as follows. If a delay is apparent, the vessel will be informed of the approximate length of the delay. Locking priority will be established as set forth in Navigation Notice 1, which is issued annually. The lock operator will advise vessels whether conditions permit it to approach the lock and moor alongside walls or whether it is to stay clear of the approach. ![]() As you approach a lock on the Upper Mississippi River you must inform the lock operators of your desire to pass and they, in turn, will indicate to you when it is safe to proceed into the lock. ![]() Do not wait in the path of a towboat leaving the lock. The marking of restricted areas may consist of signs, buoys, aids to navigation, and lights. Always wait and then approach the lock away from the posted restricted areas upstream and downstream of the dam. Operators must require all passengers to wear a coast guard approved life jacket. ![]() Locking Through : Safety is the prime consideration when locking any type of recreational vessel through a lock. Click HERE for a virtual tour of Lock and Dam 11. Lock and Dam 11 borders on the northern edge of Dubuque, Iowa, and is 583 miles above the confluence of the Mississippi and Ohio rivers. ![]()
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