Scottish Water refurbishes the Pitfodels Distribution Service Reservoir in Aberdeen, United Kingdom; extends service life and potable-water compliance

Scottish Water refurbishes the Pitfodels Distribution Service Reservoir in Aberdeen, United Kingdom; extends service life and potable-water compliance

saw_Pitfodels Distribution Service Reservoir

Sika@Work Structural Strengthening, Concrete Repair & Protection Structural Repair and Strengthening Pitfodels Distribution Service Reservoir, ­Aberdeen, United Kingdom

Project description Pitfodels Distribution Service Reservoir (DSR), located in Aberdeen, is an important part of Scottish Water’s drinking water distribution network. Originally constructed in the 1930s, the reinforced concrete reservoir was taken out of service after inspections identified water ingress and significant deterioration of the roof structure. Rather than replacing the ageing asset, Scottish Water chose to refurbish and strengthen the existing reservoir, providing a more sustainable and cost-effective solution. Covering approximately 3,000 m² with a depth of 8 metres, the reser- voir is comparable in size to two football pitches. Following refurbish- ment, the structure was upgraded to meet the stringent requirements for potable water storage, extending its service life while restoring an essential part of the region’s drinking water infrastructure. Project requirements The refurbishment presented significant structural and operational challenges. Initial inspections identified water ingress through the roof structure. Once the reservoir had been drained, detailed investigations revealed substantially greater deterioration than originally anticipated, requiring extensive structural repairs and strengthening beyond the initial scope. The project was further complicated by the absence of as-built docu- mentation, requiring engineering decisions to be made following de- tailed on-site investigations. Working inside an 8-metre-deep confined space also imposed strict health and safety requirements, including specialist confined-space procedures and emergency rescue planning. A further challenge was the continuously damp environment. Since several strengthening systems require dry substrates to achieve opti- mum performance, the reservoir had to be carefully dehumidified before repair and strengthening works could begin. Finally, all repair materials had to comply with the stringent hygiene requirements applicable to structures used for drinking water storage, ensuring long-term durability without compromising water quality. The cost-effective repair and refurbishment of a mothballed reservoir to bring it back into service proves a sustainable, economic alternative to a costly new build replacement. Pitfodels Distribution Service Reservoir      Aberdeen, United Kingdom

Sika solutions Following detailed condition assessments, Sika worked closely with Morrison Construction, Fraser Bruce Group and the project engineers to develop an optimized refurbishment strategy that provided both struc- tural strengthening and longterm concrete protection. Structural Repair and Strengthening Concrete defects were repaired using Sika MonoTop® repair mortars before strengthening works commenced. Because the soffit surface was uneven and remained damp, the origi- nally proposed CFRP fabric system was replaced by the Sika® CarboDur® Grid C system, which uses a cementitious mortar to bond and encap- sulate an expanded CFRP grid. This solution allowed efficient streng- thening of the extensive roof soffit despite the challenging substrate conditions. The secondary beams were further strengthened using Sika® CarboDur® S626 carbon fibre plates bonded with Sikadur®-30, providing additional structural capacity where required. After completion of the strengthening works, the concrete surfaces were protected with SikaTop®-588 Seal, a Drinking Water Inspectorate (DWI) approved protective coating suitable for potable water applications. Technical service and on-site support Sika played an active role throughout the project, supporting the con- tractor from the early design stage through to final installation. Working together with Morrison Construction, Fraser Bruce Group and Allen Gordon LLP, Sika participated in developing the refurbishment strategy after the true extent of the deterioration became evident. Technical specialists assisted in selecting the most appropriate streng- thening solution, adapting the specification when site conditions made the original approach impractical. To ensure successful installation of the new strengthening system, Sika provided hands-on installation training, with a specialist travelling from Switzerland to train the contractor on the application techniques, spray equipment and product systems. Sika personnel also completed Confined Space Training, enabling them to safely access the reservoir and provide on-site technical assistance whenever required. This close collaboration between client, contractor, engineers and Sika ensured the selected solution could be installed efficiently while main- taining the highest standards of quality and safety. Pitfodels Distribution Service Reservoir      Aberdeen, United Kingdom

Project participants Project owner Scottish Water Main contractor Morrison Construction Specialized ­contractor Fraser Bruce Group Ltd Structural ­engineer Allen Gordon LLP Sika Organization Sika Limited (United Kingdom) Project outcome The refurbishment successfully returned the reservoir to service as a drinking water storage facility while avoiding the need for complete re- placement. By refurbishing the existing structure, Scottish Water achie- ved a solution costing approximately one quarter of a new replacement, representing savings of around £3 million. The upgraded structure benefits from a 30-year design life, providing a sustainable solution that significantly reduced material consumption, construction waste and embodied carbon compared with building a new reservoir. Sika Services AG Tueffenwies 16 CH-8048 Zurich Switzerland Contact Phone +41 58 436 40 40 sika.com Any product name or reference reflects the Sika product name at the time of creation of this document and may differ from the product name or reference during past events. Our most current General Sales Conditions shall apply. Please consult the most current local Product Data Sheet prior to any use. © Sika Services AG / Engineered Refurbishment / 07.2026 Pitfodels Distribution Service Reservoir      Aberdeen, United Kingdom