The "Crater Loops", which are a series of two 180° curves, were constructed to allow the railroad to climb at no more than a 2% grade as the Craig Branch makes its way from Bond up to Phippsburg (and beyond toward Steamboat and Craig). A mining operation, which has been in operation here for decades, is visible in the distance. Scoria (volcanic) rock is mined here and used in many places in Colorado and beyond.
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