Monongahela Connecting Railroad Company, Hot Metal Bridge, Spanning Monongahela River at mile post 3.1, Pittsburgh, Allegheny County, PA

Significance: Formerly enabled the hauling of molten iron from J & L Blast Furnaces on the north side over the bridge to the Open Hearth Furnaces on the south side of the Monongahela River.

Survey number: HAER PA-277-C

Building/structure dates: 1900 Initial Construction

Building/structure dates: 1950 Subsequent Work

Building/structure dates: 1960 Subsequent Work

steel truss bridges railroad bridges transportation railroad companies steel industry pittsburgh pa monongahela railroad railroad company hot metal bridge hot metal bridge monongahela river post mile post pittsburgh allegheny allegheny county pennsylvania engineers and contractors carl j jacobsen edgemoor bridge works historic american engineering record jones and laughlin steel corporation ltv steel corporation richard l mccombs monongahela connecting railroad company edwin k morse william samek structural associates photo ultra high resolution high resolution construction sites construction bridge construction library of congress

1900

Library of Congress

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