A photograph of the completed steel shaft and engine house of the Short Mountain Colliery of the Lykens Valley Coal Company, Bear Gap, Dauphin County, Pennsylvania, taken about 1915.
The curved track in the foreground was used to return empty coal cars from the breaker to the shaft, where they would be lowered as necessary to be filled with coal – then raised, bumped off onto a track to take the loaded cars to the breaker – and repeated endlessly in that fashion.
Corrections and additional information should be added as comments to this post.
The engine house was built over the engines as can be seen in the post describing the engines, where the engines were shown, but not the housing..
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