A dredger, the <a href="https://en.wikipedia.org/wiki/Mallard_II" class="extiw" title="w:Mallard II">w:Mallard II</a>, in a slough near the <a href="https://en.wikipedia.org/wiki/Dumbarton_Bridge" class="extiw" title="w:Dumbarton Bridge">w:Dumbarton Bridge</a> in California, USA. This is the oldest operating dredge in California.
JPxG
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Canon T4i