Awali Tunnel

tunnel, Lebanon

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Last updated

June 18, 2026

Quick Summary

The Awali Tunnel in Lebanon, a 10-mile civil-engineering project completed in 1960, faced significant challenges. During construction, a massive influx of water and sand inundated over 2 miles of the tunnel, more than doubling the project's duration to eight years. This incident highlights the critical role of thorough geologic investigation in tunneling projects to anticipate and mitigate risks associated with ground and water conditions. Environmental controls, such as ventilation and dust suppression, are also essential for safe working conditions in tunnels.12

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tunnels and underground excavations
Basic tunneling system
At the Awali Tunnel in Lebanon in 1960, for example, a huge flow of water and sand filled over 2 miles of the bore and more than doubled construction time to eight years for its 10-mile length.
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At the Awali Tunnel in Lebanon in 1960, for example, a huge flow of water and sand filled over 2 miles of the bore and more than doubled construction time to eight years for its 10-mile length.
Read More