🛠️ Invention or technique

La Rance tidal power station

Central mareomotriz de La Rance

Date
1966 · confidence high
Place
La Rance, Saint-Malo, Brittany, France
Credited to
Électricité de France (Robert Gibrat)
Field
Matter & energy

What it is

A barrage closing the Rance estuary with 24 bulb turbines totalling 240 MW, using tides of up to 13 m. It was the first large-scale tidal power station and the largest for almost half a century.

Opened in November 1966; Korea's Sihwa station (254 MW, 2011) surpassed it in capacity.

What it led to

  • the Annapolis and Sihwa tidal stations
  • reversible bulb turbines
  • environmental impact studies for tidal barrages
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Sources✓ verified 2026-11-04