Lock And Dam Number Twenty-one
| Use attributes for filter ! | |
| Area | 44 |
|---|---|
| Catchment area | 349649 |
| Year built | 1938 |
| Operator | United States Army Corps of Engineers |
| Added to NRHP | March 10, 2004 |
| Construction began | 1933 |
| Date of Reg. | |
| Date of Upd. | |
| ID | 2440453 |
About Lock And Dam Number Twenty-one
Lock and Dam No. 21 is a lock and dam located at Quincy, Illinois on the Upper Mississippi River around river mile 324. 9. The movable portion of the dam is 1,265 feet long and consists of three roller gates and ten tainter gates. A 1,400 feet long submersible dike continues to the Missouri shore.
