Wessex Water has awarded multiple contracts for its £multi-million pound AMP8 Design and Build Contractors (Minor Works) Framework - the contract was tendered in 2024 via the Achilles UVDB qualification system.

Scope covers design and build (minor works) projects, covering potable and waste water, including new

works and / or the refurbishment, replacement, and maintenance of existing assets, including cyclical maintenance programmes.

Contracts awarded under the Framework Agreement will be for an initial term of five years with further potential extension options of up to three years in total.

Lot 1 - Non-Infrastructure Works (potable water and wastewater)

a) Potable water non-infrastructure scope including:

i. Refurbishment, replacement and provision of new potable ground and surface water production assets such as enhanced slow sand filter performance

ii. Disinfection, surge protection, chemical dosing, pumping systems and supervisory control

iii. Run-to-waste facilities, cartridge filters and UV

iv. Increased power resilience

v. New service reservoirs and inspection and maintenance of existing service and storage reservoirs

b) Wastewater non-infrastructure scope including:

i. Refurbishment, replacement and provision of new inlet screens

ii. MCC (Motor Control Centre) replacement and associated DNO (Distribution Network Operator) works

iii. Stormwater storage

iv. Event duration monitors

v. Settlement tanks

vi. Modular treatment equipment

vii. Digester roof replacement

viii. Chemical dosing

ix. Phosphorous removal

x. Odour control and increased power resilience.

Lot 2 Infrastructure Works (potable water and wastewater)

a) Potable water infrastructure scope including:

i. Distribution mains and lead communications pipe replacement

ii. Pressure management activities

iii. Inspection and maintenance of aqueducts, bridges and tunnels

iv. Reservoir maintenance and upgrades

b) Wastewater infrastructure programme including:

i. New rising mains and their replacement

ii. Refurbishment of stormwater management systems (inc. Tanks, overflow channels, outlets etc)

iii. Gravity solutions to maintain asset health and accommodate growth together with pipe bridge inspections

iv. Sustainable urban drainage (suds) and the need to respond effectively to emergency works that are generally pipeline related

v. Sewage pumping station refurbishments, enhanced power resilience, switchgear and transformer replacement

Lot 1 - Non-Infrastructure Works (potable water and wastewater) – contracts awarded:

• Bartlett Contractors Limited
• Bridges (Electrical Engineers) Ltd
• D.M.S. Engineeering Ltd
• EcoGenR8 Limited
• Electrical & Pump Services Ltd
• Envolve infrastructure ltd
• Galliford Try Construction Ltd
• Gel Engineering Ltd
• Hanevo Ltd
• Integrated Water Services Ltd
• Mildren Construction Ltd
• Mills Engineering Services Ltd
• OCU Utility Services Ltd
• OnSite Central Ltd
• Renn Consultancy Ltd.
• rhames Limited
• Stonbury Ltd
• Trant Engineering Ltd
• Unitspark Ltd

Lot No 2 - Infrastructure Works (potable water and wastewater) – contracts awarded:

• Bartlett Contractors Ltd
• Envolve infrastructure Ltd
• Galliford Try Construction Ltd
• Glanville Cleansing Ltd
• Mildren Construction Ltd
• Network Plus Services Ltd
• OCU Utility Services Ltd
• OnSite Central Ltd
• Stonbury Ltd
• United Infrastructure Water Ltd
• Unitspark Ltd

No information has been made available with regard to estimated total value of the contracts.