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A roof bolting machine works on the ceiling of the mine at Pattison Sand Company in Garnavillo, Iowa on June 5, 2013.
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© 2013 Stephen Mally
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5124x3576 / 4.9MB
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Pattison Sand Company - Garnavillo, Iowa - June 5, 2013
A roof bolting machine works on the ceiling of the mine at Pattison Sand Company in Garnavillo, Iowa on June 5, 2013.