Looking ENE from approach to Clark Bridge.
<p>Pouring last section (SW corner) of top floor of Witherspoon Street parking garage. This is an example of a <a rel="nofollow" class="external text" href="http://www.concreteconstruction.net/how-to/construction/post-tensioned-slabs_o">post-tensioned slab</a>.
At left, man in plaid shirt controls position of placing boom and rate of concrete flow via remote box connected by cable to <a href="https://en.wikipedia.org/wiki/concrete_pump" class="extiw" title="w:concrete pump">concrete pump</a>.
Workers use 2x4s, shovels and <a rel="nofollow" class="external text" href="http://www.concretenetwork.com/concrete/concrete_tools/bull_floats_and_darbies.htm">"bull floats"</a> to smooth surface of fresh concrete. (See <a rel="nofollow" class="external text" href="http://www.cement.org/cement-concrete-basics/working-with-concrete/placing-and-finishing-concrete">"Placing and Finishing Concrete"</a>.)
I-64 and JFK Bridge in distance.
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Louisville, Kentucky.
April 1988.
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file # 88d106.
35 mm Kodachrome.
Plustek OpticFilm 7600i.
Siverfast 8.
Picture Window 6.
unsharp mask (radius 1,threshold 3, 100%).
</p>
JPEG quality 95.
<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/29539037876/">88d106: Pouring top floor of Witherspoon Street garage</a>