Apr 6, 2026 - How Did Engineers Build a Massive Tunnel and Install a Hydroelectric System Inside the Alps?
600 meters beneath the Swiss Alps, engineers built a massive underground “energy battery” — the Linth-Limmern pumped storage power plant. This video breaks down how thousands of workers excavated solid rock, constructed enormous underground caverns, and assembled multi-hundred-ton machines with millimeter precision. From controlled blasting techniques and NATM tunneling to a specialized TBM drilling at a 40-degree incline — every engineering solution pushes the limits. ⚡ How did they control high-pressure groundwater that could destroy the project? ⚡ Why can this plant generate 1,000 MW in under 3 minutes? ⚡ And why is it considered a key solution for renewable energy storage?