Carlton Tunnel/ Christmas party, Supts. at portal.
Construction superintendents laugh and smile by the mouth of the Carlton Tunnel in Teller County, Colorado. Mine drainage pipes and rail tracks flank the men; one man is unusually tall, and another wears jodhpurs. Letters read: "1939-1941 Safety First - Carlton Tunnel." Pine boughs, a painted cross, a United States flag, and a clock with letters: "Compliments of Southern Colorado Power Company" adorn the concrete entrance.