Portumna bridge lies east of the town of Portumna, in County Galway, Ireland. It is a five-span road bridge, which carries the N65 across the River Shannon to Lehinch in County Tipperary. The present bridge was designed by C. E. Stanier of London, and completed in 1911, with a central section resting on Hayes's Island which divides the river into two channels.
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The structure of the main bridge, consisting of steel girders supported by concrete filled cast iron cylinders, and the pivoting swing bridge over the navigation channel, are of technical and engineering interest. The house on Hayes Island, accessed from the bridge, was the bridge operators house and pre-dates the present bridge. The opening section was replaced in October 2008
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Five-span road bridge over River Shannon, built 1911, with central section resting on Hayes's Island which divides river into two channels. Road supported on steel structure of plate girders with parapets of rivetted steel plates. Piers in river on Tipperary side of island are concrete-filled cast-iron cylinders which continue above parapet level and are capped by domed tops with finials. Other piers, from bridge of 1834, are of dressed limestone masonry the width of the bridge, with rounded ends and support cut stone parapets. Opening section of bridge over navigation channel revolves on a pivotal support on the Galway bank of the river. On the island is former bridge operator's house, of ashlar limestone with hipped slate roof.
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