We were engaged in 2023 by Jons Engineering to provide conservation architect oversight of a comprehensive programme of works to the Obelisk Bridge, Drogheda for Louth County Council.
Iron lattice girder bridges were introduced to Ireland and the U.K. by Irish railway engineer Sir John Benjamin McNeill, who was a pupil, and later an associate, of Thomas Telford. McNeill was also the engineer of the Dublin – Cork railway line which terminates at Heuston Station.
The lattice Girder were introduced to the Obelisk Bridge to replace the former wooden structure which had been carried away by the action of ice and floods in 1867, some of the timbers having been decayed. The original bridge together with its stone abutments was erected in 1856. The abutments were reused, partially rebuilt. The bridge was associated with the nearby Obelisk which was destroyed by Nationalists in 1922.
The 2023 works included re-pointing and masonry consolidation of the historic masonry walls and cut stone piers as well as repairs to the wrought iron superstructure and upgrade of the bridge deck.