Built on a shelf carved out of the hillside, Millers Dale station originally had two platforms, but a bay platform was added in 1905 to accommodate Buxton trains, plus the down platform became an island platform to serve the extra tracks.
The new loop and the second (northerly) viaduct were opened on 20 August 1905.
The old viaduct was then closed, strengthened and reopened in April 1906.
 Whilst the piers for the two viaducts are identical, the older viaduct is supported by an arch structure, whereas the later one is a box structure.

Part of the original Parliamentary Act approving the line considered the needs of invalids taking the waters at Buxton and so, for a while, 'through' carriages for Buxton were attached to, and detached from, expresses, thus alleviating the problem of changing trains.
In addition, the two main platforms were connected by a subway.
Built on a shelf carved out of the hillside, Millers Dale station originally had two platforms, but a bay platform was added in 1905 to accommodate Buxton trains, plus the down platform became an island platform to serve the extra tracks. The new loop and the second (northerly) viaduct were opened on 20 August 1905. The old viaduct was then closed, strengthened and reopened in April 1906.  Whilst the piers for the two viaducts are identical, the older viaduct is supported by an arch structure, whereas the later one is a box structure.
Part of the original Parliamentary Act approving the line considered the needs of invalids taking the waters at Buxton and so, for a while, 'through' carriages for Buxton were attached to, and detached from, expresses, thus alleviating the problem of changing trains. In addition, the two main platforms were connected by a subway.
Millers Dale railway station