Browse the atlas
OverWatts AtlasCountriesOwnersInsightsWireChangesSources Live map
Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Grid Storage
Châtelard-Vallorcine hydroelectric plant
8th-largest grid storage in France of 9 · top 81% worldwide (#776 of 965)
- Operator
- Emosson (ESA)
- Owner
- Electricité de France SA, Alpiq Suisse SA
- Status
- operating
- Capacity
- 260 MW
- Technology
- pumped storage (site also has conventional hydro)
- Commissioned
- 1978
- Also listed as
- A power plant — this site generates as well as stores
Comparable grid storages · France · 9 ranked
- #1Grand Maison hydroelectric plant1.7 GW
- #6Pouget hydroelectric plant447 MW
- #7Coche hydroelectric plant384 MW
- #8Châtelard-Vallorcine hydroelectric plant260 MW
- #9Lac Noir Pumped Storage hydroelectric plant55 MW
Grid connection · within 50 km
- Nearest substation
- Poste électrique du Châtelard
- Its voltage
- 380 kV
- Distance
- 1.7 km
- Strongest line nearby
- 400 kV
- Line operator
- Swissgrid
- Substations in range
- 5
Mapped grid infrastructure from OpenStreetMap, whose coverage is excellent in some regions and sparse in others. Nothing shown here means nothing is mappednearby — not that the site is unconnected. Lines are matched on a segment’s midpoint, so a corridor passing directly overhead can be missed; this under-reports rather than invents.
Co-located infrastructure · within 25 km
- Châtelard-Vallorcine hydroelectric plant0 m · Power Plant · 260 MW · hydro
- Le Chatelard hydroelectric plant1.4 km · Power Plant · 112 MW · hydro
- Le Chatelard hydroelectric plant1.4 km · Grid Storage · 112 MW
- 380 kV line1.7 km · Transmission Line
- Poste électrique du Châtelard1.7 km · Substation / Converter
- Nant de Drance4.0 km · Substation / Converter
- Nant De Drance hydroelectric plant4.1 km · Power Plant · 900 MW · hydro
- Nant De Drance hydroelectric plant4.1 km · Grid Storage · 900 MW
- 400 kV line11 km · Transmission Line
- Bâtiaz11 km · Substation / Converter
On the interactive map
Portfolio
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)