Construction work for water projects

Tender description

TWUL are procuring design and build delivery capability for Infrastructure and non-Infrastructure projects. Essentially, TWUL recognises these as: Infrastructure – nominally the underground network of water mains and sewage: and Non-infrastructure – nominally all above ground plant, equipment, structures and process; the expected scope of works spans Thames Water’s water and wastewater infrastructure (network) and non-infrastructure (treatment) assets across the Thames Water region. The nature of the infrastructure scope broadly extends from rehabilitation, replacement and provision of new sewers and potable water pipelines to inspection and maintenance of aqueducts and tunnels. This will also include refurbishment, replacement and provision of new pumping station assets. Non-infrastructure scope includes refurbishment, replacement and provision of new potable water and wastewater treatment assets including service and storage reservoirs. The water Non Infrastructure scope includes but is not limited to: — refurbishment, replacement and provision of new potable ground and surface water production assets such as enhanced slow sand filter performance — disinfection — surge protection — chemical dosing — Supervisory Control and Data Acquisition (SCADA) — run-to-waste facilities — cartridge filters and UV — increased power resilience — new service reservoirs — inspection and maintenance of existing service and storage reservoirs The Wastewater non-infrastructure scope includes but is not limited to: — refurbishment, replacement and provision of new treatment facilities such as inlet works — stormwater storage — event duration monitors — settlement tanks — biological treatment, tertiary treatment, sludge treatment including Thermal Hydrolysis Process (THP) — Digester roof replacement — Combined Heat and Power (CHP) — chemical dosing — phosphorous removal, — odour control — SCADA — increased power resilience. The scope of Water Infrastructure programme includes but is not limited to the following activities: — trunk mains replacement; — new trunk mains associated with growth, distribution mains and lead communications pipe replacement; — pressure management activities; — inspection and maintenance of aqueducts, bridges and tunnels. The scope of Wastewater Infrastructure programme includes but is not limited to the following activities — new rising mains and their replacement; — rehabilitation and replacement of sewers near and crossing rail; — gravity solutions to maintain asset health and accommodate growth together with pipe bridge inspections. This programme will also include sustainable urban drainage (SUDs) and the need to respond effectively to emergency works that are generally pipeline related. Investment in sewage pumping stations will include; pump replacement, enhanced power resilience, switchgear and transformer replacement. The requirements outlined above will be located across all Thames Water's Operational Areas.