TGP undertook the detailed design of 2.2km of bypass up to three lanes wide incorporating large diameter culvert and pumping station beneath the Stirling Alloa Kincardine railway line. This scheme also comprised design of two new signal controlled junctions within Kincardine Village. Key to the scheme was the remediation of old mine workings to enable the bypass to cross the redeveloped areas.

The scheme involved the grouting of approximately 74,000 cubic metres of sub-surface coal seams beneath the carriageway and associated junctions. The road was built partially on the flood plain of the River Forth on embankments. A trial embankment, constructed at commencement of the works was used to monitor pore pressure dissipation in the underlying strata. The data collected from the trial embankment was used to optimise the design and eliminate the need for band drains that are typically used to accelerate consolidation in soft ground conditions.

As the line of the road leaves the flood plain it crosses the line of an old sea wall. At this location a geocell mattress was designed to re-distribute loads and mitigate the effects of the change from soft to harder ground conditions. Extensive consultation with environmental bodies was necessary due to the close proximity of a site of special scientific interest. Surface water run-off and excess from the flooded mine workings was contained in temporary settlement ponds and ditches until the permanent works filtration drains and pumped drainage outfall were fully operational.

The project illustrates the advantages of having an integrated design and construction planning team to manage of the earthworks. Due to the local topography, the highway was constructed almost totally on embankments that were designed to utilise lightweight PFA fill, economically sourced from the power station located close to the site boundary. However, this material would be rendered unsuitable if exposed to wet weather during the winter period and was therefore capped by spent oil shale, another bi-product of local industrial activity. Also, in areas where the lightweight properties of the fill do not offer advantages, the PFA was replaced by spent oil shale.