William A. Pratt

NS - Gallitzin Tunnel (Blair County, Pennsylvania)
Assistant Chief Engineer, 1904
Tunnel under Tunnel under Allegheny Mountains on Norfolk Southern Railway (formerly PRR) on Norfolk Southern Railway (formerly PRR)
Closed to all traffic

NS - Market Street Overpass (Perry County, Pennsylvania)
Built 1903
Bridge over Market Street on Norfolk Southern
Open to traffic

PRR - Whitford Flyover (Chester County, Pennsylvania)
Built 1904
Through truss bridge PRR P&T Branch over Amtrak
Abandoned with deck removed