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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,194 companies indexed · Last updated: today
DirectoryIndustryEnergy IndustryChâteau-D'OexForces Motrices Hongrin-Léman S.A. (FMHL)
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Forces Motrices Hongrin-Léman S.A. (FMHL)

Summary

About the company

Forces Motrices Hongrin-Léman S.A. (FMHL) operates a hydroelectric storage and pumped‑storage facility comprising a dam and underground pumping/turbine power stations. Key assets include the Hongrin dam and two underground pumped‑storage plants; Alpiq manages production and Hydro Exploitation SA operates the installations under mandate.

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Hydropower development for storage and pump-turbine operation
Hydropower development for storage and pump-turbine operation, including the Hongrin dam, the underground power plants in Veytaux, and storage and water-transfer infrastructure.
Hongrin Dam
Storage structure holding 52 million m3 of water, with two double-curvature arch dams, supplied by a natural catchment area and intake structures.
Hydropower plants in Veytaux
Underground pump-turbine power plants using the hydraulic infrastructure between the Hongrin and Lake Léman to generate and transfer electricity.
Pump-turbine operation
Storage and feed-back of electricity by pumping water to the Hongrin lake and then running it through turbines, to compensate for generation fluctuations and stabilise the grid.
Peak energy generation
Production of around one billion kilowatt-hours of peak energy per year, fed into the high-voltage grid.
Security of electricity supply
Contribution to winter electricity supply security thanks to the volume of the Hongrin lake and the storage capacity of the development.
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Location

Hier entsteht die Karte
1660 Château-D'Oex

At a glance

Legal form
Corporation
UID
CHE-101.440.939
Founded
1963 · 63 years
Last commercial register change
February 2, 2026
Employees
1 to 10

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