# Nant de Drance pumped storage power plant.
Publisher: CapexCue
Canonical dossier:
Dossier reference: release 1 (e7f9ea29-828b-4601-8cde-b75c5d1ca82b)
Released project intelligence
Oldest supporting observation: 2026-10-17T16:42:01.175680+00:00
Dossier released: 2026-10-17T16:58:07.995185+00:00
Source report dates and capture dates are listed per fact below; neither establishes an event date.
## Project summary
Nant de Drance is a pumped-storage plant between the Emosson and Vieux Emosson reservoirs, with its power house cavern 600 metres underground. The source reports 900 MW total capacity across six 150 MW pump turbines and 20 million kWh of storage. It also reports a maximum turbine flow of 360 m³/s and a five-minute switch from full-power pumping to full-power turbining.
## Evidence limits and unknowns
- The supplied source snapshot, observed 2026-10-17, does not state procurement status, a buying schedule, financing, ownership or operator, or a next project milestone.
Current purchasing availability: unknown.
Source-dated plans do not establish current progress or available supplier packages.
## Project metadata
Country: Switzerland
Region: Europe
Physical assets: Pumped Hydro
Derived from the exact released evidence; unresolved fields remain unclassified.
## Project category
Energy
Derived from the reviewed scope statement; delivery stage remains unclassified.
The plant is rated at 900 MW and comprises six 150 MW pump turbines. Reported storage capacity is 20 million kWh; maximum turbine flow is 360 m³/s. The plant can switch from full-power pumping to full-power turbining in 5 minutes.
Source: www.nant-de-drance.ch — https://www.nant-de-drance.ch/en/the-power-plant | published unknown | observed 2026-10-17T16:42:01.175680+00:00
Project overview
Oldest decisive evidence: 2026-10-17T16:42:01.175680+00:00
Newest evidence: 2026-10-17T16:42:01.175680+00:00
Knowledge reviewed: 2026-10-17T16:56:44.973702+00:00
Publication reviewed: 2026-10-17T16:57:59.287564+00:00
## Name
Nant de Drance pumped storage power plant.
Status: reported
Attribution: www.nant-de-drance.ch
Source: www.nant-de-drance.ch — https://www.nant-de-drance.ch/en/the-power-plant | published unknown | observed 2026-10-17T16:42:01.175680+00:00
## Scope
The plant is rated at 900 MW and comprises six 150 MW pump turbines. Reported storage capacity is 20 million kWh; maximum turbine flow is 360 m³/s. The plant can switch from full-power pumping to full-power turbining in 5 minutes.
Status: reported
Attribution: www.nant-de-drance.ch
Source: www.nant-de-drance.ch — https://www.nant-de-drance.ch/en/the-power-plant | published unknown | observed 2026-10-17T16:42:01.175680+00:00
## Sector
Pumped-storage power generation and electricity storage.
Status: reported
Attribution: www.nant-de-drance.ch
Source: www.nant-de-drance.ch — https://www.nant-de-drance.ch/en/the-power-plant | published unknown | observed 2026-10-17T16:42:01.175680+00:00
## Activity
Water is pumped from the lower dam to the upper dam to store energy when electricity demand is low or renewable production exceeds demand; water passes through the turbines to meet peak demand.
Status: reported
Attribution: www.nant-de-drance.ch
Source: www.nant-de-drance.ch — https://www.nant-de-drance.ch/en/the-power-plant | published unknown | observed 2026-10-17T16:42:01.175680+00:00
## Location
Underground between the Emosson and Vieux Emosson reservoirs; the power house cavern is 600 metres underground.
Status: reported
Attribution: www.nant-de-drance.ch
Source: www.nant-de-drance.ch — https://www.nant-de-drance.ch/en/the-power-plant | published unknown | observed 2026-10-17T16:42:01.175680+00:00
## Cite this dossier
CapexCue — Nant de Drance pumped storage power plant. — dossier released 2026-10-17T16:58:07.995185+00:00, release 1 (e7f9ea29-828b-4601-8cde-b75c5d1ca82b) — https://capexcue.com/projects/nant-de-drance-pumped-storage-power-plant-e0c9a0df-d7a/.
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