Lock and Dam No. 9
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| Lock and Dam No. 9 | |
 Mississippi River Lock and Dam number 9. |
|
| Impounds | Upper Mississippi River |
|---|---|
| Creates | Pool 9 |
| Locale | Harpers Ferry, Iowa |
| Maintained by | United States Army Corps of Engineers |
| Construction began | 1936 |
| Opening date | July 1937 |
| Geographical Data | |
| Coordinates | |
Lock and Dam No. 9 is a lock and dam located near Harpers Ferry, Iowa and Lynxville, Wisconsin on the Upper Mississippi River around river mile 647.9. The lower portion of Pool 9 was formally named Lake Winneshiek. The normal pool elevation behind the dam is 620 feet (189 m). It was constructed and placed in operation in July 1937. The site is undergoing major rehabilitation which began in 1989 and was scheduled for completion in 2006. The dam consists of concrete structure 811 feet (247.2 m) long with five roller gates and eight tainter gates. Earth embankment 9,800 feet (2,987 m) long with a grouted overflow spillway 1,350 feet (411.5 m) long. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long.
[edit] External links
- USACE Lock and Dam 9
- USGS Reach 1, Pool 9
- Survey number HAER WI-50 - Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville vicinity, Crawford County, WI
| Locks and dams of the Upper Mississippi River | |
|---|---|
| USAF • LSAF • 1 • 2 • 3 • 4 • 5 • 5A • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 24 • 25 • 26 • 27 | |
| Upstream: Lock and Dam No. 8 |
Downstream: Lock and Dam No. 10 |
