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Santa Fe Railway freight train at Largo, NM

The territory may look flat, but the train has been climbing steadily at almost 32 feet per mile since leaving the big bridge over the Pecos River at Fort Sumner. Largo is at milepost 749.6 at an elevation of almost 5,000 feet.

Santa Fe Railway freight train at Largo, NM

Just about a minute later, the fireman has pulled the blowdown valve to clear minerals out of the boiler.