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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 ...
A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
The Iowa approach is rather abrupt, going from a 25 miles per hour (40 km/h) city street straight up a steep ramp onto the bridge. Originally a privately built and operated bridge owned by the Iowa-Wisconsin Bridge Company, it was closed between 1945 and 1957, due to damage from ice damming, and lacking funds to repair the bridge, the company ...
Floodwaters from the Missouri River encroach on Interstate 680 in Iowa. The DOT closed I-680 west of I-29 and I-29 from Council Bluffs to the I-29/880 interchange.
This prompted the bloodless Honey War, with Iowa resisting the effort. The Supreme Court was to ultimately decide in State of Missouri v. State of Iowa, 48 U.S. 660 (1849), that Iowa's southern boundary was the foot of the rapids at modern day Keokuk (although accepting the Sullivan Line for the rest of the border from about 20 miles (32 km) west).
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Larger barge tows must be broken down and passed through the lock in sections, and rejoined on the opposite side. [4] The specifications for the channel itself are as follows: Depth of channel: 9 ft (2.7 m) or more. Width of channel: mostly 250 ft (76 m) to 300 ft (91 m). Bridge clearance: 300 ft (91 m) horizontal; 52 ft (16 m) vertical.