On one of our large multi-phase sites for Bellway Homes (Essex) at Cherry Hinton, Cambridge MACL recently completed a complex package of some specialist civil engineering works to deliver a new pumping station.

In February 2026, MACL, working in partnership with HB Tunnelling successfully installed an 8m deep 2.7m diameter wet well shaft alongside a 6m deep 2.7m diameter inlet manhole shaft. The connecting pipework between the two shafts was completed using an auger bore drive from within the shafts.

Due to the high groundwater levels, the depth and size of the structures a shaft sinking methodology was adopted. This approach significantly reduced the need for extensive excavation and temporary works, providing a safer and more efficient installation process.

The original structural design, driven by the groundwater conditions required substantial concrete surround to the shafts. By adopting the shaft sinking solution this requirement was significantly reduced as the caisson rings and reinforced driving beam cast around the top of each shaft contributed to the structural resistance required.

Originally programmed as a six-week operation, the works were successfully completed in just four weeks through close collaboration with HB Tunnelling and MACL’s operational management team.  Following completion of pumping station 4 the team immediately immobilised to pumping station 2 to deliver a further installation of similar scale.