Geneva’s Jet d’Eau to close for nearly five weeks

The fountain will fall silent for nearly five weeks as Geneva’s annual maintenance work gets under way. From Monday, crews will service the Jet d’Eau, with the lake-side landmark expected to resume operation on December 4, weather permitting. The shutdown gives Geneva Industrial Services, known as SIG, time to work on the machinery and lighting that keep the fountain running.

The pause affects one of the city’s most recognisable sights. The Jet d’Eau sends 500 litres of water per second into the air, reaching 140 metres above Lake Geneva. Its stream leaves the nozzle at 200 kilometres per hour, according to Swissinfo’s account of the fountain’s 125th anniversary. Those figures help explain why the installation relies on regular work below the surface as well as attention to its visible display.

SIG will remove the Jura pump for servicing at its workshops in Geneva. The pump is one of the two that power the Jet d’Eau. Every five years, one of the pair undergoes a full overhaul, a process that can take several months, SIG said. A spare pump is used during the work to minimise the effect on the landmark’s operation.

This year’s overhaul falls within the fountain’s annual maintenance period, which will keep the installation out of action for nearly five weeks. The planned return date is December 4, subject to weather conditions. The removal of the Jura pump is the main equipment work identified for this year’s programme, and takes place away from the fountain at SIG’s workshops.

Crews will also work on the valves, pumps and motors housed beneath the Jet d’Eau. SIG’s annual programme covers the machinery in the room under the fountain, along with the installation’s external lighting system. The work combines routine servicing with the more extensive overhaul of the Jura pump.

The fountain’s operating scale makes those systems central to its display. Water rises from Lake Geneva at a rate of 500 litres per second and reaches 140 metres; it exits the nozzle at 200 kilometres per hour. The maintenance shutdown gives teams time to work on equipment that supports that flow, as well as on the lights that illuminate the fountain. The Jet d’Eau is expected back in operation on December 4, if weather conditions allow.

Geneva is due to see the Jet d’Eau running again on December 4, weather permitting. Until then, the fountain will remain switched off while SIG completes the annual maintenance and services the Jura pump. The spare pump helps limit the impact of the overhaul on operations, while crews also attend to the other pumps, valves, motors and external lighting.

The return date marks the end of a shutdown expected to last nearly five weeks. The longer overhaul cycle for each pump is part of the installation’s maintenance routine: one of the two pumps receives a full overhaul every five years, and that work can take several months. For now, the next milestone is the planned restart in early December, when the Jet d’Eau is expected to resume its familiar rise above Lake Geneva.