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Shafts completed on world’s second deepest sewage treatment works

Construction work on the 68m deep shafts for a new sewage treatment works in Saudi Arabia is thought to have secured the project the title of being the world’s second deepest facility of this type.

Saudi Arabia’s National Water Company new North Jeddah Pumping Station project comprises of a screen shaft and two pumping shafts, all of which drop over 72m in total into the ground.

The three 68m deep, circular shafts were formed by main contractor Abuljadayel Co using diaphragm walling techniques and were then lined following excavation and formation of the base slab using RMD Kwikform formwork.

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