Mississippi River Lock and Dam No. 6

W24005 Lock & Dam Road, Trempealeau, Wisconsin

Part of the Upper Mississippi 9 Foot Navigation Project


Photo taken by J.R. Manning September 2017




Located at mile 714.1 on the Mississippi River, the lock and dam is seventh in the series of 29 dams in the Upper Mississippi River 9 foot navigation project. (The Upper Mississippi River runs from its source to its confluence with the Ohio River.) The lock elevates river traffic 7 feet.

Several of the 29 locks and dams are on the NRHP. This is not one of them.

The dam is 893 feet long, a concrete structure with five roller gates and 10 tainter gates. There is an earth embankment 2,600 feet long and a concrete overflow spillway that is 1,000 feet long.

The lock is 110 feet wide and 600 feet long.

The lock and dam was built between 1933 and June, 1936 when it went into operation. It was refurbished in 1999, when a public observation deck was added.

Update Log 

  • September 1, 2018: Updated by J.R. Manning: Fixed a typo in the Description
  • October 30, 2017: Added by J.R. Manning


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net