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The '''Whitehall Tunnel''' in [[Allegheny County, Pennsylvania]] was originally built by the [[B&O Railroad]] in 1899 as a double
It was part of the [[Baltimore and Ohio Short Line Railroad]], and allowed the B&O to bypass its former route into Pittsburgh along the [[Pittsburgh Southern Railway|Pittsburgh Southern]] and [[Little Saw Mill Run Railroad]]. It is currently a single-track tunnel, owned by [[CSX]]. One worker, Antonio De Bono, was killed during its construction.<ref>{{cite news |title=Fatal cave-in in a tunnel |work= [[New York Times]] |date= 25 March 1900|accessdate=3 March 2009 |quote= |url=http://query.nytimes.com/mem/archive-free/pdf?_r=1&res=9F05E7DD1E3CE433A25756C2A9659C946197D6CF}} </ref>
The tunnel is approached from [[Glenwood B&O Railroad Bridge|Glenwood]] in the south, up a steep grade along the [[Streets Run]] valley to the northern end of the tunnel. The line continues from the southern end to [[Bruceton, Pennsylvania]].
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Engineer: W. T. Manning; Bennet & Talbot, subcontractor, 1901-02
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