Pittsburgh Steel Company, Monessen Works, Blast Furnace No. 1 & No. 2, Donner Avenue, Monessen, Westmoreland County, PA

Significance: No. 1 and No. 2 Blast Furnaces were blown-in in 1913. The two furnaces were nearly identical in design and capacity at the time of construction and shared a common cast house, an unusual arrangement. The cast house was composed of an integrated structural system comprised of brick masonry and steel. This was a common mill construction technique during this period. The plan arrangement of the cast house was such that molten iron was directed to hot metal transfer (torpedo) cards on the south side of the building, while slag was deposited into slag cars or into a slag pit on the north side.
Unprocessed Field note material exists for this structure: N260
Survey number: HAER PA-253-A
Building/structure dates: 1919 Initial Construction
Building/structure dates: 1977 Subsequent Work
Building/structure dates: 1985