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AWARD Complete

K298 Maple Lodge STW Quality AMP 7 New Permit

Published 17 Feb 2026
17 Feb 2026


Reference: TC2239
This project includes, but is not limited to the following packages of work: An additional inlet screen with civils alterations and screening handling upgrade An additional detritor and flow inlet channel, incorporating a new storm separation weir A new storm tank and river outfall, including flow transfer culvert and new storm return pumping station Upgrades to the existing six PSTs and conversion of three storm tanks into PSTs, fitted with chain and flight scraper Replacement Primary chemical dosing pumps to aid Phosphorus removal A new activated sludge plant Bank C, with new feed PS and blowers Eight new 28m diameter final settlement tanks, interconnecting pipework, distribution chambers and RAS system A new secondary chemical dosing system to aid Phosphorus removal Two new Tertiary Solids Removal treatment plants, one serving the effluent from Bank A and B, and one serving the effluent from the new Bank C An additional Drum thickener New incoming switchboard for the new DNO supply Modification and upgrade of HV/LV networks Modification and upgrade to the power management system and site-wide SCADA Modification and upgrade to the Process SCADA Additional standby powered generation Demolition and removal of redundant structures, plant and equipment N.B. Please note that this Contract Notice shows a value of £280m. The current contract value is circa £140m-£280m.

Full CPV breakdown

  • 45252127 — Wastewater treatment plant construction work (primary)

Notice details

Buyer type
Utility
Competition
Restricted / competitive (suppliers are shortlisted first)
Contract type
Works
Winning supplier
Large company
Procurement method
Competitive flexible procedure
Main category
Works
Above threshold
Yes
Legal basis
UKPGA 2023/54
Notice status
Complete
Award status
Pending
Award date
17 Feb 2026
Standstill period ends
26 Feb 2026
Reserved / special regime
Utilities
Language
EN
Published
17 Feb 2026 15:58
OCID
ocds-h6vhtk-04faf2
Notice ID
TC2239

Organisations on this notice

2nd Floor Optimum House, Salford, M50 3XP, United Kingdom
GB-COH 01157281

Key dates

Future Signature Date
31 Mar 2026 · Scheduled

Everything the publisher included in this notice, organised by section.

Organisations

Party 1 › Name THAMES WATER UTILITIES LIMITED
Party 1 › Address › Street Clearwater Court
Party 1 › Address › Town / city Reading
Party 1 › Address › Postcode RG1 8DB
Party 1 › Address › Country GB
Party 1 › Address › Country United Kingdom
Party 1 › Address › Region (NUTS) UKJ11
Party 1 › Contact › Email procurement.support.centre@thameswater.co.uk
Party 1 › Role buyer
Party 1 › Classification › Description Private utility
Party 2 › Name KIER INFRASTRUCTURE AND OVERSEAS LIMITED
Party 2 › Address › Street 2nd Floor Optimum House
Party 2 › Address › Town / city Salford
Party 2 › Address › Postcode M50 3XP
Party 2 › Address › Country GB
Party 2 › Address › Country United Kingdom
Party 2 › Address › Region (NUTS) UKD34
Party 2 › Contact › Email kisproposals@kier.co.uk
Party 2 › Role supplier
Party 2 › Link http://www.kier.co.uk
Party 2 › Business size large
Party 2 › VCSEs No
Party 2 › Public service mission organisation No
Party 2 › Sheltered workshop No

Buyer

Name THAMES WATER UTILITIES LIMITED

Tender

Title K298 Maple Lodge STW Quality AMP 7 New Permit
Status complete
Procedure type selective
Procedure Competitive flexible procedure
Special regime utilities
Lot › Status complete

Awards

Title K298 Maple Lodge STW Quality AMP 7 New Permit
Status pending
Date 17 Feb 2026
Value › Value incl. VAT £280,000,000
Value › Currency GBP
Category works
Above threshold Yes
Supplier › Name KIER INFRASTRUCTURE AND OVERSEAS LIMITED
Item › CPV › Description Wastewater treatment plant construction work
Item › Delivery › Region (NUTS) UKI
Item › Delivery › Country GB
Item › Delivery › Country United Kingdom
Standstill period › End 26 Feb 2026
Contract period › Start 1 Apr 2026
Contract period › End 29 Mar 2030
Document › Document type Award notice
Document › Description Contract award notice on Find a Tender
Document › Link https://www.find-tender.service.gov.uk/Notice/014471-2026
Document › Published 17 Feb 2026
Assessment Summaries Date Sent 17 Feb 2026
Milestone › Type Future signature date
Milestone › Due 31 Mar 2026
Milestone › Status scheduled
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