126 loads of Pennsylvania coal drag up the grade at Duff Mountain. Due to the DPU not working, the train would stall and require a de facto manned helper to get over the grade.

CSX AC4400CW #418 crests the grade at NE Kilsyth with loaded coal train T700 bound for Georgia Power's Plant Bowen.

Florida-bound empty Phosphate train CSX K811-24 crests Duff mountain at Kilsyth on the KD Sub on a sunny Christmas Eve day.

Having just topped the Duff Mountain grade K447 will continue South towards LaFollette. Once the pusher reaches this point at the Northend of Kilsyth it'll cut-off on the fly and head North back t... (more)

Fall color is ablaze as a southbound loaded grain train led by a YN2 AC4400 stomps over the summit of Duff Mountain Grade in Duff, Tennessee, splitting a set of Louisville & Nashville searchlights... (more)

Q541 crests the hill into Kilsyth, having finally won the battle against gravity and Duff Mountain. The Morely pusher is tied onto the rear, giving an assist. Many of the Absolute Signals on this ... (more)

The "Chaska Hill Helper" shoves loaded coal train T70003 up Duff Mountain on a cold winter day where the temps were 20 degrees below normal.

The "Chaska Hill Helper" uses Helper Link to cut away from coal train T700003 on the fly. In short order, C212 will receive a clear signal to drift back down Duff Mountain to their base... (more)

Southbound manifest Q539 tops the Duff Mountain grade as winter storm Jonas continues to dump snow across northern Tennessee. The storm practically shut down the KD Sub with signal failures and tr... (more)

Another northbound crests the summit at Duff. Searchlights still hold thier numbers at control points, but they are slowly being phased out.

Pulling a heavy freight over Duff Mountain and running high hood forward, a helper comes out of the sump at North Kilsyth in the Cumberland Mountains.

A welded rail train idles downhill to South Kilsyth, tying the whole KD up for the morning with trains in about every siding available between Jacksboro and Saxton.

Crawling out of the swag below the Duff Mountain grade, an engineer who's apparently extremely glad to see me works toward Lafollette and the end of the Cumberland Mountains.

Having just cut off a coal drag while in motion behind the photographer, the helper motor immediately gets the green light to return north over Duff Mountain.

With the helper still on the rear ninety some coal hoppers back, N294 clears the last swag before cresting over Duff Mountain on a beautiful sunny fall day.