Centre pier of Staircase Gully viaduct 1905.

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DescriptionThe pier which is of iron is seen here at its full height of 220 feet. It is built on a concrete foundation 30 feet deep. The gully is 480 feet across. The contract for building the viaduct over the Staircase Gully was the Cleveland Bridge & Engineering Co. of England. The foundations for the viaduct commenced in March 1904, but the viaduct wasn't complete until around 1906. The 36 foot wide pier is almost in the centre of the viaduct and required 4 lots of foundations.These took a considerable time to complete. Approximately 2000 cubic yards of concrete was used. The Waimakariri River was the source of gravel for the concrete. The gravel was conveyed to the top of the river bank by means of an aerial tramway, followed by another aerial line to the foundations of the viaduct. At time of construction a large cage ran on cables between the 2 sides of the gully. The length of the Staircase Viaduct is 490 feet and height 240 feet.PhotographerWeekly News Photographer.Date of Photo6th September 1905Map^[1]ContributorMaye Dunn

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Location (city or town)Staircase Gully

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Category TagBridgeRailways

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Centre pier of Staircase Gully viaduct 1905.

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