Denbigh Flood Risk Framework Phase 3

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Client: Denbighshire County Council

Value: £1,100,000

Programme: 27 weeks

Completion Date: July 2011

Having already completed two phases on the Denbigh & Corwen Flood Risk Management Framework, Phase Three was the most technically challenging involving upgrades to the existing drainage infrastructure in the heart of Denbigh Town Centre on an NEC contract. McPhillips’ input through early contractor involvement was critical and we were able to assist the designers in making the project workable replacing the original open cut design with the extensive use of no-dig techniques.


The scheme involved open face pipe jacking 180m of 1200mm diameter pipe and auger boring 190m of 600mm diameter pipe at depths of up to 5m with the construction of 10 new manholes (2 live connections in existing storm drainage system), 18nr 600x1200mm storm drainage gullies and 20m of 300mm storm pipe. Connections into existing culverts were contractor design & build. A high number of uncharted services were encountered and these involved the excavation of a large number of trial pits and re-design of pipe runs on a number of occasions. Traffic management was McPhillips designed and managed and no-dig construction methods meant that road closures were not required.