The following is the author's description of the photograph quoted directly from the photograph's Flickr page.<br>"This looks like its used for something very specific.  I'm guessing for doing maintenance on the dam.  Any other ideas? "
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/67867196@N00">Russell Harrison</a>
CC BY-SA 3.0
<p>originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/67867196@N00/4384239254/">Government Barge</a>
</p>
<ul><li>Uploaded using <a href="//commons.wikimedia.org/wiki/User:Odie5533/F2ComButton" title="User:Odie5533/F2ComButton">F2ComButton</a></li></ul>