The Binnian Tunnel 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.
Source: Wikipedia.org
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Address: Newry and Mourne, United Kingdom
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