Longest hydroelectric tunnel

What to remember

The longest tunnels in the world carry neither trains nor cars but water. The longest hydroelectric tunnel is the Neelum-Jhelum Hydropower Tunnel, at 68.0 km and dated 2017, near Muzaffarabad, Pakistan.

It is part of the 969 MW Neelum-Jhelum Hydropower Plant. The scheme diverts water from the Neelum River to a power station on the Jhelum River, 42 km south of Muzaffarabad.

Construction began in 2008, after a Chinese consortium won the contract in July 2007. The first generator was commissioned in April 2018, and the fourth and last unit was synchronised with the national grid on 13 August 2018.