Looking NW from upper end of 600-foot <a href="https://en.wikipedia.org/wiki/Lock_(water_navigation)" class="extiw" title="w:Lock (water navigation)">lock</a> at <a rel="nofollow" class="external text" href="http://www.lrl.usace.army.mil/Missions/Civil-Works/Navigation/Locks-and-Dams/McAlpine-Locks-and-Dam/">McAlpine Locks</a>
<p>Crane barge in lock, which is being demolished and replaced with a new 1200-foot lock.
<a rel="nofollow" class="external text" href="http://www.ruhlin.com/documents/Temporary_Cellular_Cofferdam_Design_Installation_Removal_Willow_Island.pdf">Cofferdam</a> under construction in distance.
Mobile crane dropping off a concrete form.
The concrete structure to the right of the crane contains machinery which opens and closes one of the two "<a href="https://en.wikipedia.org/wiki/Francis_Goold_Morony_Stoney" class="extiw" title="w:Francis Goold Morony Stoney">Stoney</a> gates" which let water into the lock.
(See <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/bill_alden/6791988437/">diagram of 600-foot lock at McAlpine</a> showing Stoney gates and culverts.)
.
<a href="https://en.wikipedia.org/wiki/Ohio_River" class="extiw" title="w:Ohio River">Ohio River</a> mile 607.
<a href="https://en.wikipedia.org/wiki/Louisville,_Kentucky" class="extiw" title="w:Louisville, Kentucky">Louisville, Kentucky</a>.
Mar. 3, 2001.
file # a1c010.
.
</p>
6x9 cm E-6 transparency, taken with Fuji GW690 II (90 mm lens) or Fuji GSW690 III (65 mm lens).
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/70020260@N04">William Alden</a> from Louisville, Kentucky, USA
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/bill_alden/42672947762/">a1c010: McAlpine Locks replacement project</a>