K298 Maple Lodge STW Quality AMP 7 New Permit

THAMES WATER UTILITIES LIMITEDcontractFind a TenderRef ocds-h6vhtk-04faf2Procurement Act 2023Utilities regimepending
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Estimated value

Awarded value

Awarded 17 Feb 2026

Suppliers

1

Lots

1

1 awarded

Published

17 Feb 2026

Description

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.

Scope

Reference
TC2239
Commercial tool
Standalone contract
Contract dates
19 Oct 2025 to 29 Mar 2030
CPV classifications
45252127
Contract locations
London, United Kingdom

Award criteria

Criteria the buyer will use to evaluate bids.

NameDescriptionTypeWeighting
Technicalquality40.00%
Commercialprice40.00%
Behavioralquality20.00%

Submission & procedure

Procedure
Competitive flexible procedure

Award details

Awarded supplier(s), contract period and value as published in the award notice.

Awarded value

Award date

17 Feb 2026

Contract start

31 Mar 2026

Contract end

29 Mar 2030