To help bridge the gap created by the missing (Sheriff Mill) viaduct, spoil from the excavation of Imberhorne cutting (part of the works necessary for the Bluebell's extension to East Grinstead) was used to extend existing embankments, towards Ardingly.
The construction project involved using spoil from the excavation at Imberhorne cutting, which is part of the work needed for the Bluebell's extension to East Grinstead, to raise existing embankments towards Ardingly to bridge the gap left by the missing Sheriff Mill bridge.