Summary – Top 10 Longest Tunnels in the World

List of Top 10 Longest Tunnels in the World

The following table lists the World’s longest tunnels in the world....

Longest Tunnel in the World – Delaware Aqueduct (United States)

The Delaware Aqueduct is a 137-kilometer (85-mile) tunnel that carries about half of New York City’s water supply. The aqueduct was constructed between 1939 and 1945, and carries around 1.3 billion US gallons of water per day....

Second Longest Tunnel in the World – Paijanne Water Tunnel (Finland)

Paijanne Water Tunnel is the second longest tunnel in the world. It is a 120-kilometer long water tunnel in Southern Finland and runs 30–100 meters below the bedrock. The tunnel was constructed between 1973 and 1982 to transport water from Lake Päijänne to the Helsinki metropolitan area. The main purpose of the tunnel is to provide fresh water to the people in the Helsinki metropolitan area....

Third Longest Tunnel in the World – Dahuofang Water Tunnel (China)

Dahuofang Water Tunnel is the third longest tunnel in the world located in the Liaoning region of China. The total length of the tunnel is 85.3 km (53 mi) with a diameter of eight meter. Around 60 km (37 mi) of the tunnel is being built by using tunnel boring machines (TBM)....

Fourth Longest Tunnel in the World – Orange–Fish River Tunnel (South Africa)

The Orange–Fish River Tunnel is the fourth longest tunnel in the world located inn the central South Africa. The tunnel is the longest continuous enclosed aqueduct in the southern hemisphere and the second-longest water supply tunnel in the world. It was built between 1966 and 1975 to divert water from the Orange River to the Fish River valley....

Fifth Longest Tunnel in the World – Bolmen Water Tunnel (Sweden)

Bolmen Water Tunnel is the world’s fifth longest tunnel located in the Kronoberg/Scania province of Sweden. It is a 51-mile (82 km) long water supply tunnel that provides drinking water to about 700,000 people. It was built between the 1970s and 1980s to meet the water supply demand of the growing population of the Sweden....

Sixth Longest Tunnel in the World – Chengdu Metro Line 6 (China)

Chengdu Metro Line 6 is a rapid transit line in Chengdu and is the sixth longest tunnel in the world. It is the second longest metro line in Chengdu and the longest non-branching line in China. Chengdu Metro Line 6 is a 68.223 km (42.4 mi)long rapid transit line that runs from Wangcong Temple to Lanjiagou....

Seventh Longest Tunnel in the World – Neelum–Jhelum Hydropower Tunnel (Pakistan)

The Neelum–Jhelum Hydropower Tunnel is a 32.5 kilometer long tunnel system located in the Muzaffarabad, Azad Kashmir, Pakistan. The main purpose of the tunnel is to divert the Neelum River water to a power station on the Jhelum River. The tunnel passes 380 m (1,247 ft) below the Jhelum River and through its bend. The tunnel system is made up of single and twin circular and horseshoe-shaped tunnels....

Eighth Longest Tunnel in the World – Emisor Oriente Tunnel (Mexico)

Emisor Oriente Tunnel is the eight longest tunnel in the world located in the Mexico City, Mexico. It is a 62.1 kilometer long wastewater treatment tunnel and is also known as the Eastern Discharge Tunnel, Eastern Wastewater Tunnel, and East Issuing Tunnel. The tunnel was constructed between 2008 and 2019 and runs at a maximum depth of 200 meters (656 Feet) below ground level....

Ninth Longest Tunnel in the World – Qingdao Metro Line 1 (China)

Qingdao Metro Line 1 is an underground metro line that runs north-south from the North Railway Station to Dongguozhuang. It is the ninth longest tunnel in the world. It is a rapid transit system that crosses Jiaozhou Bay between Fenghuangdao and Tuandao stations. It started it operation in 2020 and has 41 stations....

Tenth Longest Tunnel in the World – Guangzhou Metro Line 18(China)

Guangzhou Metro Line 18 is the world’s tenth largest tunnel in the world. It is a 61.3 km (38.1 mi) express line that runs from Wanqingsha in the Nansha District to Guangzhou East Railway Station. The total tunneling distance is 2,525 meters....

Key Points based Longest Tunnels in the World

Longest railway tunnels in the world:...

Summary – Top 10 Longest Tunnels in the World

The world’s 10 longest tunnels cover various purposes and locations. The Delaware Aqueduct serves as a water supply tunnel, while the Paijanne Water Tunnel in Finland plays a crucial role in water distribution. China boasts two significant tunnels on the list: the Chengdu Metro Line 6 and the Qingdao Metro Line 1, both facilitating urban transportation. Meanwhile, the Neelum–Jhelum Hydropower Tunnel in Pakistan contributes to power generation. Emisor Oriente Tunnel in Mexico addresses wastewater management, emphasizing environmental concerns. Guangzhou Metro Line 18 in China completes the list, showcasing the global importance of tunnels in diverse fields, from water management to transportation and infrastructure development....

FAQs – Top 10 Longest Tunnels in the World

Which is the longest tunnel in Asia?...