The upgrade will boost the site’s capacity by nearly a quarter to serve 750,000 people, with tighter environmental standards and better water quality at the heart of the scheme.
Dry weather flow will rise by 24% and full treatment capacity by around 20%.
Work gets underway this summer and will run through to 2028. The scheme follows a successful early contractor involvement phase where Kier led enabling works and design development.
It forms part of Severn Trent’s Green Recovery programme and strengthens a 20-year working relationship with Kier, who will co-locate with delivery partners on-site in a new welfare village.