by Jeff Smith
http://thealternativepress.com/articles ... g-marvel-1
When William Trusdale became president of the Delaware, Lackawanna and Western in 1899, he began looking for a straighter route. By 1905, engineers had surveyed more than a dozen potential routes between Port Morris and Slateford, Pa., Because any east-west route in Northwest New Jersey would cross the north-south hills, some tunneling seemed inevitable. Some of the routes surveyed would have required much longer tunnels than the Oxford Tunnel.
The route that was chosen had no grade crossings and its longest tunnel, Roseville, was 1,024 feet. It reduced the curvature by 1,560 degrees and the average grade from 1.1 percent to .55 percent. It cut the distance by 11 miles. The entire 11 feet of rise and fall was on an east-west upgrade on the Pequest Fill east of Greendell, meaning the majority of the distance saw a grade of less than .1 percent.
The downside was it required construction of the world’s largest land bridge.
Still an engineering marvel after more than 100 years, the Paulinskill Viaduct is 115 feet high and 1,100 feet long. It was the largest reinforced concrete structure in the world, when it was built between 1908 and 1910.
Because it is hidden in the hills of Knowlton Township, the viaduct, also called the Hainsburg Viaduct for the nearby village, shocks first-time drivers who round a curve on Station Road off Route 94 and find themselves suddenly under a massive arch.
Next stop, Willoughby
~el Jefe ("Jeff Smith Rules") :: RAILROAD.NET Site Administrator/Co-Owner
~el Jefe ("Jeff Smith Rules") :: RAILROAD.NET Site Administrator/Co-Owner