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)

Lehigh Valley 8104, Norfolk Southern's eighth heritage locomotive, rests outside the Juniata Paint Shop. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, visit... (more)

Lehigh Valley 8104, Norfolk Southern's eighth heritage locomotive, rests outside the Juniata Paint Shop during unusual wintry mix weather. Casey Thomason photo, copyright Norfolk Southern Corpor... (more)

NKP 8100 leads train 651 west around Horseshoe Curve on track 3 as train 650 eases downhill on track 1. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, visit ... (more)

Interstate 8105, Norfolk Southern's seventh heritage unit, rests outside the paint shop in Chattanooga. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, visit ... (more)

Interstate 8105, Norfolk Southern's seventh heritage unit, rests outside the paint shop in Chattanooga. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, visit ... (more)

Pennsylvania 8102, Norfolk Southern's sixth heritage unit, rests outside the paint shop in Altoona. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, visit <... (more)

Pennsylvania 8102, Norfolk Southern's sixth heritage unit, rests outside the paint shop in Altoona. Casey Thomason photo, copyright Norfolk Southern Corporation. For more information, visit <... (more)

"NW" 8103 leads its first revenue train along the ex N&W mainline through Tunnel 4, which was recently enlarged to allow for doublestack clearance along NS's "Heartland Corridor". Casey Thomason... (more)

An appropriate meeting for its first occurrence: As the NW heritage unit makes its maiden voyage across "home" rails, it meets the Southern heritage unit at "Farm". The helper set will pass under ... (more)

NS 8101, the Central of Georgia heritage unit, is seen here leading its first train towards the southwest Virginia coal fields, thru Natural Tunnel. Casey Thomason photo, copyright Norfolk Southe... (more)

NS 8101, the Central of Georgia heritage unit, is seen here leading its first train towards the southwest Virginia coal fields. The old barn advertises "Rock City" atop Lookout Mountain in Chatta... (more)

Norfolk and Western 8103, Norfolk Southern's fifth Heritage locomotive, is seen here just before it received its first rain-rinse in Altoona. Casey Thomason photo, copyright Norfolk Southern Corp... (more)