Clancy to connect Hampshire water infrastructure: design and delivery notes for engineers
Reviewed by Joe Ashwell
First reported on The Construction Index
30 Second Briefing
Portsmouth Water has awarded Clancy a £26.84m contract to build a new pumping station at Farlington Water Treatment Works and an 8.5km pipeline linking the works to Nelson reservoir and associated storage. Designed to transfer up to 32.4 million litres of treated water per day, the main will enable supply from Havant Thicket Reservoir while cutting abstraction from the River Test and River Itchen chalk streams. Clancy’s in-house team will deliver civil works, M&E integration and commissioning, with construction starting December and completion due early 2030.
Technical Brief
- Contract value is £26.84m, covering civils, M&E integration and commissioning under a single package.
- New pumping station is located within Portsmouth Water’s existing Farlington Water Treatment Works site.
- Pipeline alignment runs from Farlington WTW to multiple reservoirs, with Nelson reservoir as the terminal node.
- Clancy’s directly employed multidisciplinary team will manage detailed planning and all temporary works design in-house.
- Treated water transfer capacity is specified at 32.4 million litres per day through the new main.
- Scheme is explicitly tied to the Havant Thicket Reservoir project as its downstream treated-water transfer route.
- Abstraction reduction is targeted on the River Test and River Itchen chalk streams by rerouting supply via the new main.
Our Take
The 8.5km link between Havant Thicket Reservoir, Farlington WTW and Nelson reservoir will materially change how Portsmouth Water can balance abstractions from the River Test and River Itchen, likely giving the utility more headroom to manage drought restrictions and environmental flow constraints in Hampshire.
With Vysiion already upgrading Portsmouth Water’s OT/IT resilience under a separate AMP8 framework, this new Clancy pipeline scheme indicates the utility is sequencing both physical network reinforcement and digital control upgrades in parallel, which should improve system-level reliability once Havant Thicket comes online.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
Related Articles
Related Industries & Products
Construction
Quality control software for construction companies with material testing, batch tracking, and compliance management.
Mining
Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.
QCDB-io
Comprehensive quality control database for manufacturing, tunnelling, and civil construction with UCS testing, PSD analysis, and grout mix design management.