Oxford Tunnel

The tunnel was completed in 1862, and was retrofitted with a gauntlet track by 1900.

The completion of the tunnel was delayed due to inconsistent funding, American Civil War-era technology, and issues with digging through gneiss.

Later on, as train cars became larger, it became impossible to allow two tracks to fit through the tunnel.

The gauntlet track maximized the overhead and side clearances in the tunnel, but restricted the tunnel to a single-track section, creating a bottleneck on the line.

In the end, the building of the Lackawanna Cut-Off would be the only solution that worked.