Location:
Greater London and the Thames Valley
St Albans, Hertfordshire
Client:
Affinity Water
Contract value:
£5.8 million
Scope of works:
Clean Water Trunk Main Installation
Browne delivered the Hemel Road to Stonecross trunk main, an essential project to secure water supply for St Albans and protect local chalk streams.
of potable water pipeline installed across diverse landscapes
accidents or incidents across 14,500 working hours
weeks ahead of schedule completion
Significant environmental protection measures incorporated for the River Ver and local habitats
Browne was appointed by Affinity Water to deliver the Hemel Road to Stonecross trunk main, a £5.8 million project designed to secure a sustainable water supply for St Albans while protecting the River Ver. The scheme involved installing 8km of new pipeline to reduce abstraction from sensitive chalk streams.
This included 3.3km of PE pipe laid across fields and 4.7km of ductile iron main through busy urban roads. As part of our established approach, early engagement with Hertfordshire Highways enabled a carefully phased programme that helped minimise road closures and reduce disruption to the local community.
Environmental Care
The route crossed environmentally sensitive areas, including the River Ver and protected habitats. Browne conducted early assessments, secured permits, and adapted methods to protect wildlife, including water voles and a badger sett.
Urban–Rural Delivery
Navigating varied landscapes, Browne used a phased approach to accelerate work and complete key sections ahead of highway resurfacing.
Safety Performance
With over 14,500 hours worked, the project was completed without incidents, supported by strong safety processes, audits, and team engagement.
Exceptional performance on Thames Water’s Mains Renewal Framework
Delivering a Resilient Water Network for Greater London and the Thames Valley
Borehole Installation and Pumping Station in Walthamstow
Delivering Sustainable Water Infrastructure in Environmentally Sensitive Areas
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