Collection search - (Quebec Bridge) Quebec Bridge. View looking west showing actual fall of the centre span of Quebec Bridge as it was being lifted into place Sept. 11th, 1917. The photo shows southwest corner disappearing into the water, the span turning over on its side, while the other three corners are still resting on their supports. The twisting of the span is causing the bracing to tear apart and buckle, leaving the trusses unsupported and causing collapse of the whole span

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