Lock and Dam No. 11
Lock and Dam No. 11 as seen from a drone.
Official name	General Zebulon Pike Lock and Dam No. 11
Location	Dubuque, Iowa / Jamestown, Grant County, Wisconsin
Coordinates	42°32′25″N 90°38′39″W / 42.540278°N 90.644167°W / 42.540278; -90.644167
Construction began	1934
Opening date	14 September 1937
Operator(s)	U.S. Army Corps of Engineers, Rock Island District
Dam and spillways
Impounds	Upper Mississippi River
Length	1,478 ft (450 m)
Reservoir
Creates	Pool 11
Total capacity	170,000 acre⋅ft (0.21 km3)
Catchment area	81,600 sq mi (211,000 km2)
Lock and Dam No. 11 Historic District
U.S. National Register of Historic Places
U.S. Historic district
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Location	11 Lime Street, Dubuque, Iowa
Area	114.2 acres (46.22 ha)
Built	1937
Architect	Abbott, Edwin E.; multiple
Architectural style	lock and dam
MPS	Upper Mississippi River 9-Foot Navigation Project MPS
NRHP reference No.	04000171[1]
Added to NRHP	March 10, 2004

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.

The movable portion of the dam is 1,478 feet (450.5 m) long and consists of 13 tainter gates and three roller gates. The non-movable part is a 3,340 feet (1,018.0 m) long non-overflow earthen dam that connects to the Wisconsin shore.

The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. There is also an incomplete auxiliary lock.^[2]

The lock and dam are listed on the National Register of Historic Places.^[1]

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.^[3]

In December 2015, 200 coots died near the dam and O'Leary Lake.^[4]

• Lock and Dam No. 11
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  Aerial view, with Eagle Point Bridge (1940)

• Mississippi River locks
• Upper Mississippi River National Wildlife and Fish Refuge
• Eagle Point Bridge
• Sinnipee, Wisconsin
• Public Works Administration dams dist

• Lock and Dam No. 11 - U.S. Army Corps of Engineers (Official site)
• Media related to Mississippi River Lock and Dam number 11 at Wikimedia Commons
• USGS.gov: Reach 1, Pool 11
• USACE Civil Works Digital Project Notebook
• Historic American Engineering Record (HAER) No. IA-23, "Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, Upper Mississippi River, Dubuque, Dubuque County, IA", 50 photos, 16 data pages, 3 photo caption pages