US Army Corps of Engineers
St. Paul District

Lock & Dam 9

  • Located on Mississippi River mile 647.9 near Lynxville, Wis.
  • Constructed and placed in operation in July 1937. The site underwent major rehabilitation from 1989 to 2006.
  • The dam consists of concrete structure 811 feet long with five roller gates and eight tainter gates. Earth embankment 9,800 feet long with a grouted overflow spillway 1,350 feet long.
  • Lock is 110 feet wide by 600 feet long.
  • Brochure

Recreation Opportunities

The site has a public observation platform and restrooms that are open from dawn to dusk from April to November.
Lock and Dam 9
Lock & Dam 9, Lynxville, Wis.

Contact Information

U.S. Army Corps of Engineers
St. Paul District
Lock and Dam No. 9

RR1 Box 119
Lynxville, WI 54626-8793

(608) 874-4311