Lock and Dam No. 5A
 Lock and Dam 5A, Upper Mississippi River. View is upriver to the northwest. | |
| Location | Winona, Minnesota / Buffalo, Buffalo County, Wisconsin, USA |
|---|---|
| Coordinates | 44°05′06″N 91°40′25″W / 44.085119°N 91.673698°WCoordinates: 44°05′06″N 91°40′25″W / 44.085119°N 91.673698°W |
| Construction began | 1932 |
| Opening date | June 1936 |
| Operator(s) | United States Army Corps of Engineers |
| Dam and spillways | |
| Impounds | Upper Mississippi River |
| Length | 682 feet (207.9 m)(movable portion) |
| Reservoir | |
| Creates | Pool 5A |
| Total capacity | 39,600 acre·ft (0.0488 km3) |
| Catchment area | 59,105 sq mi (153,080 km2) |
Lock and Dam No. 5A is a lock and dam located near Fountain City, Wisconsin and Goodview, Minnesota on the Upper Mississippi River around river mile 728.5. It was constructed in 1932, placed in operation in 1936. Its last major rehabilitation was from 1989 through 2000. The dam consists of a concrete structure 682 feet (207.9 m) long with five roller gates and five tainter gates with an earth embankment 22,000 feet (6,705.6 m) long. Its concrete overflow spillway is 1,000 feet (304.8 m) long and its lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. A recent addition includes a museum for local hero's such as Abraham Lincoln.
External links
- U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 5A
- U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 5A brochure
- Survey number HAER MN-23 - Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Winona vicinity, Winona County, MN
| Locks and dams of the Upper Mississippi River | ||
|---|---|---|
| Upstream: Lock and Dam No. 5 |
Downstream: Lock and Dam No. 6 | |