Lock and Dam No. 15th
| Lock and Dam No. 15th | |
|---|---|
|
|
| Basic data | |
| Places: |
Rock Island , Illinois Davenport , Iowa |
| Geographical coordinates: | 41 ° 31 ′ 7 ″ N , 90 ° 34 ′ 8 ″ W. |
| Construction time: | 1931-1934 |
| Weir | |
| Type: | Roller weir |
| Maximum storage height: | 2.70 m |
| Dam length: | 366.70 m |
| Lock chambers | |
| usable chamber length (1): | 182.9 m |
| usable width (1): | 33.5 m |
| usable chamber length (2): | 109.7 m |
| usable width (2): | 33.5 m |
Lock and Dam No. 15 ( Lock and Barrage No. 15 ) is one of 29 barrages that enable navigation on the Upper Mississippi . The combined structure is located below the Government Bridge between the cities of Rock Island , Illinois and Davenport , Iowa . In 2004 the Lock and Dam No. 15 included in the NRHP as a Historic District .
Barrage
The barrage consists of a roller weir with eleven damming rollers with a total length of 366.7 meters. In contrast to most other dams, these are offset in the direction of flow. Two of the damming rollers are equipped with overflow openings.
The water level is 9 feet (2.70 m). The purpose of the weir is not flood protection, but damming the Mississippi for shipping.
The dam on Rock Island is the largest roller weir in the world.
lock
The lock consists of two chambers. The main chamber is 182.9 m long and 33.5 m wide, the second lock chamber is 109.7 m long with the same width. This means that large push convoys have to be decoupled. The uncoupled barges are pulled into the large lock chamber on ropes, while the push boat is locked through the second chamber.
Individual evidence
- ↑ Entry in the National Register Information System . National Park Service , accessed May 17, 2016
- ↑ Tour of Locks and Dam 15 ( Memento of the original from September 27, 2006 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved July 18, 2012
Web links
Coordinates: 41 ° 31'7 " N , 90 ° 34'8" W.