| Lock and Dam No. 19 | |
|---|---|
 Mississippi River Lock and Dam number 19 | |
| Location | Hamilton, Illinois / Keokuk, Iowa |
| Coordinates | 40°23′45.46″N 91°22′26.71″W / 40.3959611°N 91.3740861°W |
| Construction began | 1910 |
| Opening date | 1913 |
| Operator(s) |  U.S. Army Corps of Engineers, Rock Island District |
| Dam and spillways | |
| Impounds | Upper Mississippi River |
| Length | 4,620 feet (1,408 m) (movable portion) |
| Reservoir | |
| Creates | Pool 19 / Lake Cooper |
| Total capacity | 292,000 acre⋅ft (0.360 km3) |
| Catchment area | 119,000 sq mi (310,000 km2) |
Lock and Dam No. 19 Historic District | |
  | |
| Location | 525 N. Water St., Keokuk, Iowa |
| Area | 160.5 acres (65.0 ha) |
| Built | 1870 |
| Architect | Meigs, Montgomery; Cooper, Hugh L. |
| MPS | Upper Mississippi River 9-Foot Navigation Project MPS |
| NRHP reference No. | 04000179[1] |
| Added to NRHP | March 10, 2004 |
Lock and Dam No. 19 is a lock and dam located on the Upper Mississippi River near Keokuk, Iowa. In 1978, the Keokuk Lock and Dam was listed in the National Register of Historic Places, #78001234. In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 19 Historic District, #04000179 covering 1,605 acres (650 ha), 7 buildings, 12 structures, 1 object. The lock is owned and operated by the U.S. Army Corps of Engineers. The dam is owned and operated by Ameren Missouri.
The lock and dam obliterated the Des Moines Rapids which had effectively been the northern barrier for traffic on the Mississippi until efforts began in 1837 to address the Mississippi's 2 ft 6 in (76 cm) depth in the rapids.
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