OTB Engineering worked to deliver Chester's biggest infrastructure project in decades: a one km long surface water drainage tunnel within historic Roman city walls as part of the Chester Northgate development. The existing drainage scheme was at capacity and new drainage infrastructure was needed.

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Working alongside Vinci, Donegan and Welsh Water, OTB provided NEC3 contract project management, project supervision, and technical advice to Cheshire West and Chester Council on tunnelling issues. As the project's manager, OTB navigated complex engineering, geological and archaeological challenges to ensure the delivery of a quality, value engineered project ahead of time and under budget.

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