EMD power is in abundance as a Penn Central SD40 teams up with a patched Conrail SDP45 and a patched SD40 to lead an empty hopper train into Bennington Curve, about a mile east of Tunnelhill, Pennsylvania. Two tracks over, a helper set consisting of an early repaint SD40 and a patched SD45 drift east toward Altoona. This was my first trip to the Horseshoe Curve area, and it seemed that there was always activity on at least one of the four tracks.