Service Reservoir Cleaning, Maintenance and Refurbishment Framework Agreement

Dwr Cymru (Welsh Water/DCC) is seeking to establish a Framework Agreement for cleaning, maintenance, and refurbishment services for approximately 828 potable water storage tanks across its operational area. This business-critical service is essential for maintaining the cleanliness, integrity, and operational condition of water storage assets while ensuring compliance with Drinking Water Inspectorate (DWI) regulations and internal standards. Scope of Services: Cleaning: High-pressure water or soft brush cleaning with DWI-approved disinfectants, and chemical cleaning where required. All cleaning activities include inspection of service reservoirs. Maintenance: Minor planned and reactive remedial works including concrete and steel repairs, coatings, membranes, ladders, pipework, joints, and external earthworks. Emergency reactive repairs are also included. Excluded works are structural modifications, embankment works, hydraulic modifications, capacity alterations, and Reservoirs Act Panel Engineer appointments. Framework Details: The framework will be awarded to two suppliers with an initial contract term of 3 years, extendable for up to 5 additional years (2+2+1 structure). The estimated value for the initial 3-year term is £25.5 million (approximately £8.5 million annually), with a maximum 8-year contract value of £68 million. Tank Types: The estate includes below-ground and above-ground steel or concrete tanks and water towers, with most being square, underground concrete structures requiring routine cleaning and inspection per DCC's internal standard PNL 810.