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Which Is The World’s Longest Tunnel: Top 9!

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The world’s largest tunnels are one of the greatest engineering skills humanity has ever developed. In fact, we (humanity) have been digging tunnels in various ways for millennia. Today, the advancement of technology and the increase in opportunities facilitate the construction of huge tunnels.

However, not all tunnels were dug purely for “logistical” needs, as might be expected. Tunnels were widely used in mining operations (still in use) and in warfare.

The predecessors of modern tunnels are canals built to carry water for irrigation, drinking or sewage, as well as road, rail and underwater tunnels. The first Qanats, the first underground aqueducts, date well before the 2000s BC.

Where is the World’s Longest Road Tunnel and How Many Km?

longest tunnels in the world laerdal tunnel

The longest road tunnel in the world is the Laerdal Tunnel in Norway. It is 24.5 kilometers in total and was built between 1995 and 2000.

In Which Country Is The Longest Underwater Tunnel And How Long Is It?

Although not included in our list below, the longest underwater tunnel is the Eurotunnel, which runs between Folkestone in England and Calais in France. This tunnel was for a long time the second longest railway tunnel in the world.

The tunnel, which still maintains the title of the longest underwater tunnel and the longest international tunnel, is more than 50 kilometers long and has been in service since 1994.

Mankind has been digging tunnels for thousands of years, yes. However, these 9 tunnels on our list are an indication of how advanced digging techniques have been. Here are the 9 longest tunnels in the world.

1. Delaware Water Tunnel (The Longest Tunnel in the World)

world’s longest tunnels delaware water tunnel

Location: New York State, USA

Length: ~137 kilometers

Usage Area: Water Supply

The Delaware Aqueduct is the longest continuous tunnel in the world. It carries the water to New York City.

The tunnel was dug through hard rock and has a width of 4 meters for most of its route. This massive water transport tunnel was built during WWII and carries around 1.3 billion gallons (1 gallon = 3.78 liters) of water per day.

2. Päijänne Water Tunnel (The Second Longest Tunnel in the World)

longest tunnels in the world päijänne water tunnel

Location: Southern Finland

Length: ~ 120,000 m

Usage Area: Water Supply

The Päijänne Water Tunnel is the second longest tunnel in the world with a length of just over 120,000 meters. It is located in Southern Finland and is located 30 to 100 meters below the ground surface.

The tunnel carries clean water for the millions of residents of Southern Finland’s major cities such as Helsinki, Espoo and Vantaa. Construction began in 1972 and took nearly 10 years to complete.

3. Dahuofang Water Tunnel (The Longest Tunnel in China)

world’s longest tunnels dahuofang water tunnel

Location: Liaoning Province, China

Length: 85,000 m

Usage Area: Water Supply

The Dahuofang Water Tunnel is the third longest continuous tunnel in the world. It is located in Liaoning Province of China and is approximately 85.3 km long.

The tunnel was built to supply fresh water from the Dahuofang Reservoir to the cities of Shenyang, Fushun, Liaoyang, Anshan, Panjin, Yingkou, and Dalian. Construction began in 2006 and was completed just three years later.

4. Orange–Fish River Tunnel

longest tunnels in the world orange fish river tunnel

Location: South Africa

Length: > 82.000 m

Purpose of Use: Water Supply

The Orange-Fish River Tunnel is an irrigation tunnel located in South Africa. Its construction began in 1966 and was completed in 1975.

The tunnel’s length of more than 82 km makes it the longest closed water tunnel in the southern hemisphere. An estimated 842,000 m3 of concrete was used for the construction work.

5. Bolmen Water Tunnel

world’s longest tunnels bolmen water tunnel

Location: Kronoberg / Scania, Sweden

Length: ~ 82,000 m

Purpose of Use: Water Supply

Bolmen Water Tunnel is another water transport tunnel in Scandinavia. It was built to carry water from Lake Bolmen in Kronoberg to Skane, Sweden.

It supplies water to around 700,000 Swedish citizens and has a cross-sectional area of ​​about 8 m2. Construction began in 1975 and took nearly 12 years to complete.

6. Emisor Oriente Tunnel (World’s Longest Wastewater Tunnel)

world’s longest tunnels emisor oriente tunnel

Location: Mexico City, Mexico

Length: > 62,000 m

Usage Area: Waste Water Transport

The Emisor Oriente Tunnel is a wastewater treatment tunnel located in Mexico City, Mexico. Its length of 62 km makes it the longest tunnel of its kind.

Construction began in 2008 and was completed in 2014 using a tunnel boring machine. The tunnel serves 20 million people in Mexico City and surrounding cities.

7. Guangzhou Subway Line No. 3, (World’s Longest Subway Tunnel)

longest tunnels in the world guangzhou metro 3

Location: Guangzhou, China

Length: > 60,000 m

Usage Area: Metro, Public Transport

Guangzhou Metro Line is the longest subway tunnel in the world. The longest uninterrupted section of the subway’s main branch line runs between Tianhe Terminal and Tiyu Xilu.

8. Gotthard Base Tunnel (World’s Longest Railroad Tunnel)

longest tunnels in the world gotthard base

Location: Central Swiss Alps, Switzerland

Length: ~ 57,000 m

Intended Use: Railway

Gotthard Base Tunnel is the longest railway tunnel in the world. It is also the longest transit tunnel in the world, with a total underground length of approximately 151 km (we can’t put it at the top as there isn’t a single tunnel).

Since the total tunnel diverges at certain points, it is in the 9th place, not the 1st. Construction started in 1999 and it was put into service in 2016 as a result of long studies.

9. Beijing Subway Line 10

world’s longest tunnels beijing subway line 10

Location: Beijing, China

Length: > 57,000 m

Usage Area: Metro, Public Transport

Beijing Subway Line 10 runs approximately 57 km in total and is the second loop line in Beijing’s rapid transit system. The whole tunnel goes underground and goes through the Haidian, Chaoyang and Fengtai districts.

Line 10 is the longest subway loop line in the world and one of the longest fully underground subway lines.

Helpful sources: dunya – dusge

We have listed the 9 longest tunnels in the world for you. Do not forget to share your questions and thoughts on this subject, as well as in the comments…

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