 The power station houses a three @-@ section 48 by 12 foot ( 14 @.@ 6 m × 3 @.@ 7 m ) modernist mural in wood , plastic and gold leaf by English artist Elizabeth Falconer . The mural includes Celtic crosses , pylons , mythical beasts , and men of industry . The first section depicts the mythical Cailleach Bheur , who guarded the spring underneath the mountain . The middle panel commemorates fifteen workers killed when the roof of the turbine hall collapsed , and the final section shows the station working . 
