Case Study
Bramley Sewer Scheme
A new foul water rising main for Thames Water — combining directional drilling and open excavation to extend network capacity at the Bramley Storm Tank with minimal surface disruption.
Aerial view of the Bramley Sewer Scheme route.
Client
Thames Water
Programme
10 weeks · Apr 2026
Rising Main
796m of 225mm PE100
Scheme Value
£1.3M
01 — Overview
A new foul rising main for the Bramley network
The Bramley Sewer Scheme delivered a new foul water rising main for Thames Water — connecting into the existing network at the Bramley Storm Tank via a new 1500mm chamber. The 10-week programme commenced on 27 April 2026 and represented a £1.3M investment in local network capacity.
The scope combined directional drilling with open excavation, along with a short gravity sewer connection, ancillary fittings and slab crossings — designed to extend network performance and resilience while minimising disruption to the surrounding residential and agricultural land.
02 — Scope of Works
Six workstreams, end to end
The 10-week programme covered six interlocking workstreams — from the rising main itself to the chamber, gravity sewer connection, ancillaries and ditch crossings.
Rising Main
~796m of 225mm OD SDR11 PE100 foul rising main installed and commissioned.
Directional Drilling
~646m of sewer installation using directional drilling, minimising surface disruption across the route.
Gravity Sewer
8m of DN375 concrete gravity sewer, connecting to the existing Thames Water manhole.
New Chamber
1500mm diameter chamber constructed and commissioned at the Bramley Storm Tank connection.
Ancillaries
One washout, two air valves and associated chambers installed along the rising main.
Ditch Crossings
Four concrete slab crossings over existing ditches along the easement.
Site Photography
On site
03 — Outcomes
Delivered on time, on budget, to specification
796m
Of 225mm PE100 rising main installed and commissioned along the route.
646m
Delivered via directional drilling to minimise surface disruption.
£1.3M
Scheme value, delivered to specification over a 10-week programme.
Foul water rising main successfully delivered, improving network performance and resilience with minimal surface disruption to the surrounding residential and agricultural land.
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