The winner of the 2022 ACEI Project of the Year is the Cork Lower Harbour Main Drainage Scheme. The scheme provides treatment for a 65,000 PE population previously discharged, untreated, to Cork Harbour. It includes 36 km of sewers, twenty pump stations, and twin rising mains laid beneath the estuary. Significant works were required in poor ground close to old buildings. A complex project for which the consultant provided a high level of skill in engineering design, planning, consultation, and approvals. The project has had a significant environmental benefit for a wide community. The use of innovative treatment technologies and the recovery of methane to provide power for the treatment plant are considered highly sustainable design features.