20 Francs Hydropower

Switzerland's commemorative franc series has leaned heavily on infrastructure themes since the early 2000s, and this issue marks the centenary of several major Alpine hydroelectric projects that reshaped how the country managed its electricity grid — and its political relationship with neighboring states competing for the same glacial runoff. Swiss hydropower currently supplies roughly 56% of domestic electricity production, a figure that made neutrality in energy policy considerably easier to maintain through the twentieth century's various crises.