Pump station PS205 Upgrade Location: Christchurch, NZ Schedule: 2021 – 2023 Project Background This pump station, commissioned in 1979, is Christchurch’s largest stormwater pump station, consisting of three Archimedes Screw-pumps with a total pumping capacity of 13 m3/s. The station serves a crucial role in preventing flooding of roads and properties surrounding Horseshoe Lake by effectively pumping stormwater from the lake and discharging it into the Ōtākaro Avon River. After 40 years of service, the station required an upgrade to restore discharge height lost in the Christchurch earthquakes of 2010 – 2011, improve equipment reliability, and enhance safety for operators and maintenance staff. Project Overview The sustainability of this project is notable for the decision to refurbish the existing Archimedes screws locally instead of purchasing replacement screws from The Netherlands or remanufacturing new screws in New Zealand. Head Contractor Seipp Construction engaged Taurus Engineering to conduct the screw refurbishment, including removal, condition assessment/reporting, repairs, modification, grit blast/repaint, and reinstallation/alignment of the screws back in position at the station. Taurus Engineering was also responsible for all other structural metalwork and mechanical fitting tasks associated with the upgrade, such as fuel pipework, heat exchangers, exhaust pipework/discharge stack, lifting gantries, tank support frames, platforms, handrails, rotating equipment guarding, debris screens, and the removal and reinstallation of the screw drive trains.