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Published October 1, 2026 at 8:00 PM

Updated October 7, 2026

Site work, paving and new construction of a civil project in Somerset, Pennsylvania. Design plans call for the construction of a bridge / tunnel; and road / highway.

Plans call for the replacement of the historic, narrow, twin-tube Allegheny Tunnel built in the 1940's. The project will carve out a massive open-air cut, roughly 250 feet deep and 1,000 feet wide, through the ridge of the Allegheny Mountain to create a seven-lane alignment with dedicated truck-climbing lanes. TIMELINE: Preliminary engineering & environmental studies will run through 2029, with property acquisition planned for 2030 and construction targeted to begin 2033.

Design

Bridges / Tunnels

$500,000,000.00

Public - State/Provincial

New Construction, Paving, Site Work

Plans and Specifications are not available for this project. If that changes, they will be made available here.

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April 1, 2033

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PA Turnpike, Somerset, PA

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