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| ||style="text-align:center;" | '''Masonry'''
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| || All the stone must be of the best quality of Red Sandstone of the district all good sound hard stone of equal quality and such as shall receive the approval of the Engineer.<ref group="note">In May 1875 the appointed contractor, Charles Dickinson, wrote to the GWR explaining his difficulty in obtaining suitable stone for the piers of the viaduct and requesting the difference in price for it to be built entirely of brick, to which the GWR agreed.</ref?>
The foundation courses of Viaduct and Bridges shall consist of large flat bedded stones laid close together bedded and filled with mortar and brought up to a level surface to receive the masonry of the walls above and the whole work shall be executed in accordance with the drawings applicable to each structure and with the figured dimensions marked thereon.
