Mississippi River Lock & Dam 5A

W679 State Hwy 35 Fountain City, WI 54629-7214

One of the 29 lock & dam sets that is part of the Upper Mississippi River 9-Foot Navigation Project


Welcome Signage

There are no public facilities, except for interpretive signage, at this location.

Photo taken by J.R. Manning August 2018




Located at mile 728.5 on the Mississippi River, just south of Fountain City, Wisconsin, the lock and dam is fifth 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.)

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

The dam is 682 feet long, a concrete structure with five roller gates and five tainter gates. There is an earth embankment 22,000 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 in 1932 went into operation in 1936. It was refurbished between 1988 and 2003.

No public facilities nor observation deck are available. There is interpretive signage.

Update Log 

  • September 1, 2018: Added by J.R. Manning


  • J.R. Manning - Lugnuts969 [at] gmail [dot] com