Yorkshire Water has gone out to tender with a major AMP8/9 Storm Overflow Alliance contract worth an estimated £1.3 billion.

The water company is looking to put a Storm Overflow Alliance in place to support the delivery of its AMP8 capital investment programme for the AMP8 regulatory period will run from April 2025 to March 2030.
The contract covers design, civil engineering works and process works (including mechanical, electrical, instrumentation and telemetry) as well as scope and programme change management, progress and performance reporting, quality management and commissioning. The Alliance Agreement will also include the option of extension for AMP9 requirements.
The Alliance partners will be required primarily to provide expertise, guidance, support and resources in design, planning, management, and delivery of assets associated with combined sewer overflows.
This includes new assets, renewals, modification, maintenance, and refurbishment.
Partners appointed to the Alliance may also be required to provide expertise, guidance, support and resources in design, planning, management, and delivery of extensions to water networks, sewerage networks and sewer rehabilitation works, and pumping stations.
The utility is currently compiling its strategy for PR24, working in collaboration with stakeholders and regulators to confirm the capital projects and programmes that will need to be undertaken, and the investment available.
Yorkshire Water anticipates that the main tranches of work will be Storm Overflow Programme outputs.
Project delivery may also be required prior to the start of the regulatory period - Yorkshire Water is also anticipating instructing work to be carried out before the start of AMP8 to assist the transition from the current AMP7 programme into the next regulatory programme.
YW anticipates that an Alliance will consist of a minimum of one solutions design consultant and three contractors and intends to create a pre-qualified bidder list from which bidders will be requested to create a pre-formed Alliance for Invitation to Tender (ITT) stage.
The anticipated Alliance spend is £500 million for AMP8, with a projected £800 million for AMP9, based on the Estimated Total Value.
The water company is looking to award of a 10-year Alliance contract, with the option of a break period after 5 years to coincide with the end of AMP8.
Time limit for receipt of tenders or requests to participate is 11 August 2023 - click here to access the tender documentation.
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Hear how United Utilities is accelerating its investment to reduce spills from storm overflows across the Northwest.