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View northwest of arch spans from Commericial St;
Center arch;
Side-by-side pairs of arch ribs meet at piers
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Arch rib meets base of pier;
Pier columns step back in Gothic-Deco design;
Western arch plunges into hillside above Nine Mile Run;
Paver block lining controls scour below westen arch
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Drop arch design of transverse arches which connect spandrels;
Inspection catwalk runs entire length under each structure
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Two views northeast from slag pile;
View southeast from Squirrel Hill Tunnel fill
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Details of western concrete beam approach spans;
View east of deck from slag pile;
View north from PA Dept of Highways press release
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