The Interstate heritage unit eases out of the smaller tunnel within Natural Tunnel. The creek that created Natural Tunnel passes thru a smaller naturally-made tunnel in the lower right of the ima... (more)
The Interstate heritage unit leads its first revenue train away from Knoxville as it crosses the Holston River at Strawberry Plains, TN. Casey Thomason photo, copyright Norfolk Southern Corporati... (more)
The Interstate heritage unit goes for a spin on the turntable at the Sevier Yard diesel shop in Knoxville. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, vis... (more)