General Zebulon Pike Lock and Dam No. 11 is a lock and dam located between Dubuque, Iowa, and rural Grant County, Wisconsin, on the Upper Mississippi River.
It was opened to navigation September 14, 1937.
Description The movable portion of the dam is long and consists of 13 tainter gates and three roller gates. The non-movable part is a long non-overflow earthen dam that connects to the Wisconsin shore.
The main lock is wide by long. There is also an incomplete auxiliary lock.
The lock and dam are listed on the National Register of Historic Places.
History Construction the lock began in February 1934 while the dam was started to be built September 1935. They were completed August 1936 and May 1937 respectively. The system was put into operation on September 14, 1937.
In December 2015, 200 coots died near the dam and O'Leary Lake. In March 2018, several barges got loose and hit the dam.
Gallery
See also
Upper Mississippi River National Wildlife and Fish Refuge Eagle Point Bridge Sinnipee, Wisconsin Public Works Administration dams dist
References
External links Lock and Dam No. 11 - U.S. Army Corps of Engineers (Official site)
USGS.gov: Reach 1, Pool 11 USACE Civil Works Digital Project Notebook