<a href="https://en.wikipedia.org/wiki/Dredging" class="extiw" title="w:Dredging">Dredging</a> below <a rel="nofollow" class="external text" href="https://www.lrl.usace.army.mil/Missions/Civil-Works/Navigation/Locks-and-Dams/McAlpine-Locks-and-Dam/">McAlpine Locks</a>.
<p>Side-to-side motion of dredge is controlled by cables connected to anchors on either side of the dredged channel.
These anchors must be repositioned as the dredge moves upriver.
The anchors are connected to lift cables (for want of a better term) marked by white buoys.
Here a crewman on "Buddy" attaches the boat's hoisting cable to an anchor's lift cable.
K&amp;I Bridge pier at left.
</p><p>Twin screw towboat "Buddy" (doc. # 630004, length 50 feet, breadth 20 feet, Caterpillar 3408 diesels, 730 hp)
This boat has a pair of <a href="https://en.wikipedia.org/wiki/Shear_legs" class="extiw" title="w:Shear legs">sheerlegs</a> and a winch at the bow, allowing it to hoist and move the anchors which enable the dredge to swing from side to side
Built in 1980 by <a rel="nofollow" class="external text" href="http://shipbuildinghistory.com/shipyards/small/serodino.htm">Serodino</a>, <a href="https://en.wikipedia.org/wiki/Guild,_Tennessee" class="extiw" title="w:Guild, Tennessee">Guild, Tennessee</a>
Owned by <a rel="nofollow" class="external text" href="http://www.luhr.com/">Luhr Bros.</a>, Columbia, Illinois
Still operating in 2018
.
<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>.
July 24, 2002.
file # a2g078.
.
IMG_0296.
</p>
Canon PowerShot A40 digital camera.
<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/42207022905/">a2g078: Crew on Buddy getting ready to move dredge anchor</a>