Project Details

AMCO are currently undertaking works for Warrington Borough Council for the Design, Supply and Construction of a new Bascule Bridge carrying Marsh House Lane over the disused St Helens canal.

Design and Build NEC2 Option A

The temporary steel bridge at Marsh House Bridge is to be replaced with a new moveable Bascule steel bridge of single leaf construction. The existing foundations previously installed has been fully or partially demolished and modified to accommodate the new abutments.

A permanent moveable bridge deck will be installed, commissioned and operated over a period of 6 months, by utilising a temporary power pack and hoses to check its operation. The bridge lift operation will be undertaken in a separate one day visit, following commissioning.

A temporary pedestrian footbridge was installed over the canal while the old bridge was being removed, for light deliveries on foot to the industrial units.


The scheme has required continuous liaison with Network Rail, National Grid, adjacent business and the general public.

Close liaisons with National Grid was required so that planned construction activities did not affect the integrity of a medium pressure pipeline which was in the vicinity. This involved de-pressurising the pipe and checking pipe joints whilst maintaining our programme of works.

The construction of the bridge /abutments were in close proximity of an operational railway / adjacent level crossing. This required continual liaison with Network Rail to satisfy their requirements and avoid affecting train movements and maintaining construction activities. The same goes for access to the adjacent industrial units on the opposite side of the canal and informing unit holders and the public of potential road closures at key times.

In February 2016 Marsh House Bridge site received 100% across health & safety, environment, quality and CSR following an Achilles Verify Audit, which is an excellent score and is the first time AMCO has ever received full marks.