Aliquippa, PA.  

Bridges  Train and Automobile Bridges of Allegheny County.

Carrie Furnace  Carrie blast furnace 1984 and after. In Swissvale and Rankin, PA.

Duquesne Works  

Edgar Thompson Works   in Braddock, PA.

Homestead Works  With a rich Labor history, it was the largest mill in the Pittsburgh area.

Spring Hill bridge  Hobo drawings from the 1930's found on this pony plate girder bridge built by the Ft. Pitt Bridge works, Pittsburg 1915. 14 miles East of downtown Pittsburgh.