A view of the ill-fated cast iron road bridge at Yarm, its foundations were laid 3rd September, 1803, completed 3rd September, 1805, but it collapsed on the night of the 13th January, 1806, before its official opening. 
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Designing cast iron bridges is tricky. If the side thrust on the abutments is too high or too low the cast iron structure will be put under tensile load and fracture without warning.