Allegheny Mountain Tunnel
| County | Somerset |
|---|---|
| Length | 6,070 ft |
| Opened |
1 October 1940 (Opening of the Turnpike) |
| South Penn Railroad | |
| Number | 6 |
| Planned Length | 5,919 ft |
| Heading Completed | 3,946 ft |
Allegheny Mountain Tunnel is one of the original tunnels of the Pennsylvania Turnpike.
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