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Project
Whitendale X Pipeline
Client
United Utilities
Value
£1,800,000
Case Study

Whitendale X Pipeline

Project
Whitendale X Pipeline
Client
United Utilities
Value
£1,800,000
The Project

Design and build project to replace an existing 100 year old concrete conduit used to convey raw water with a new 1.4km long, 800mm diameter gravity pipeline. Works were also undertaken to upgrade the existing aqueducts and the screening chamber on the pipeline.

The pipeline flows from Whitendale Intake and runs through the Trough of Bowland, concluding at Calf Clough Screening Chamber. It passes through farmland and SSSIs and gravitates over other water courses via the use of 2 nr. aqueducts.

The first section of the new pipeline was welded and slip lined through the conduit using 800mm PE SDR 26 pipe over a 470m length with the annulus filled with an expanding polymer. 

The main section of the pipeline was spigot and socket ductile iron 800mm diameter pipe on a water saturated steep slope for over 700m. 

The final section of the pipeline was constructed within a SSSI and an active slip zone, using 800mm plastic coated steel butt welded pipes. These were surrounded in rounded gravel and wrapped in geotextile to allow movement of the ground to occur without causing damage to the pipe. 

Due to the local geology and the potential for ground movement, we provided a specialist geotechnical engineer who provided input into the construction methodologies and reviewed and approved temporary works designs and monitored the works.

The two existing aqueducts were upgraded using repair mortars and epoxy coatings whilst walkways and handrails were installed to allow better maintenance of the aqueducts.

Image courtesy of SUAVE Aerial Photographers - www.SuaveAirPhotos.co.uk

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