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The Great Britain Guide

Natural landmarks · Northern Ireland

Binnian Tunnel

In or near Kilcoo.

Free admission

Binnian Tunnel in Northern Ireland, United Kingdom.

Inflow to Silent Valley Reservoir - geograph.org.uk - 7221791

N Chadwick — CC BY-SA 2.0 via Wikimedia Commons licence

Plan your visit

Typical visit
1 h–2 h
  • Free entry
  • Dog-friendly

About

Binnian Tunnel is a place of interest in Northern Ireland, United Kingdom — drawn from open-data sources for visitor reference. See the linked Wikipedia article for the full description.

Photo gallery

From the Wikipedia article

The Binnian Tunnel (2.5 miles long) was constructed between 1947 and 1950/51 and is located under the Mourne Mountains in County Down, Northern Ireland. The main purpose of the tunnel is to divert water from the Annalong Valley to the Silent Valley Reservoir underneath Slieve Binnian, after which the tunnel was named. A workforce of 150 was involved in two tunnelling teams which started from opposite ends and met in the middle nearly 800m under the roof of the mountain. When the two teams met in the middle on 6 December 1950, they were only inches out. The tunnel was created using drilling and blasting techniques. The shelters for the workers can be found on Slievenaglogh. The tunnel was designed to carry 90 million imperial gallons (410,000 m3) of water per day, be 2.5 miles (4.0 km) long, 7 feet (2.1 m) high and 8 feet (2.4 m) wide. The tunnel was officially opened in August 1952.

Excerpt from Wikipedia under CC BY-SA 4.0. See the source article linked in Sources below.

Coordinates
54.1370, -5.9960

Sources

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Frequently asked questions

Where is Binnian Tunnel?
Binnian Tunnel is in Northern Ireland, United Kingdom.
What is Binnian Tunnel?
Binnian Tunnel in Northern Ireland, United Kingdom.
How do I get to Binnian Tunnel?
Its coordinates are 54.1370°, -5.9960°.
Is Binnian Tunnel free to visit?
Yes, Binnian Tunnel is free to enter.