To construct a 3.5km long 2.85m wide tunnel, situated 30m below ground level to the west of Preston and to include eight tunnel shafts. On completion, the tunnels will hold up to 40 million litres of storm water to prevent overflows into the river Ribble.

Our brief included the production of an evidence-built programme from contemporaneous site records, and a review of KMI’s accepted programmes for robustness and suitability for any delay analysis. We were also required to repair the accepted programme in line with the findings in the review above as well as the need to consider any preparation that may be needed from the impact of the resultant delays with the ground collapse at the terminal pumping station shafts. Having gathered and assessed this information we then drew up a report to identify these delays and calculated the extension of time that would be required by KMI in order to progress through the revised works.

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