Scarborough Revised Bathing Water Directive – Sewerage Detention Upgrade

The Scarborough rBWD project included the construction of a Wastewater Pumping Station of 6900l/s capacity in a wet well/dry well configuration. The function of the structure is to provide for storm storage and pumping to treatment of 6500m3 of water storage. A restricted location was chosen for the site, sandwiched between a cliff face and the North Sea, and constrained by an adjacent 2100mm existing tunnel and promenade.

A circular caisson structure was the preferred option, given the site restrictions and the substantial imposed loading of the adjacent cliff face. 20m internal diameter was decided upon to facilitate one-way traffic on the adjacent roadway. Ward & Burke carried out all of the detailed design which was subject to independent Cat III checking.

The Scarborough project won the prestigious 2015 ICE Yorkshire and Humber region Centenary Award which is given annually to the best infrastructure project worth £5 million or over in the region.

Challenging works in this marine environment included the design, fabrication and installation of temporary cofferdam frames.

Extensive rock armour construction was carried out on this project in the challenging and aggressive environment of England’s North Sea coast.