Before Byron Hill was double tracked it was quite a bottleneck from East Valley at the bottom to West Byron at the top. Over the years it was just dealt with by first the Soo then WC. When traffic exploded on the WC in the mid 90's, with a bunch of different ore moves it became a real nightmare operationally. It seemed every westbound was coming in on short time and they would be running into a problem with a eastbound ore load crawling uphill while they cooled there heels at West Byron. This is the pusher set on an eastbound SPLD at Hamilton. WC 6621, 6605, 6588 are shoving for all there worth on this heavy ore train. These three units had brought this train down from the iron range, they were cut off and replaced with SP power at Shops yard and quickly shuffled to the rear of the train to be used to give it a push over Byron.
