Pittsburgh in Allegheny County, Pennsylvania — The American Northeast (Mid-Atlantic)
—Rivers of Steel National Heritage Area —
In 1922, the Duquesne Slag Products Company, a subsidiary of Jones & Laughlin, purchased 94 acres in the Nine Mile Run Area, now the site of the Summerset at Frick Park housing development, to dump its excess slag.
The slag heap grew to heights of 150 feet and up. By the 1970s approximately 17 million cubic yards of slag nearly filled the valley from end to end.
Erected by Friends of the Riverfront, DCNR, National Park Service.
Location. 40° 25.705′ N, 79° 57.797′ W. Marker is in Pittsburgh, Pennsylvania, in Allegheny County. Marker can be reached from the intersection of Three Rivers Heritage Trail and South 28th Street. Touch for map. Located on the Three Rivers Heritage Trail on Pittsburgh's South Side, just northeast of the Hyatt Hotel. Marker is in this post office area: Pittsburgh PA 15203, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers The MonCon Railroad (a few steps from this marker); Open Hearth Steel (within shouting distance of this marker); Hazelwood: A Rivertown Rich in History (approx. ¼ mile away); Eliza Furnace (approx. half a mile away); Iron and Steel Workers (approx. half a mile away); Jones and Laughlin (approx. half a mile away); John T. Comès (approx. 0.7 miles away); Polish Army (approx. 0.9 miles away). Touch for a list and map of all markers in Pittsburgh.
Categories. • Industry & Commerce •
Credits. This page was last revised on June 16, 2016. This page originally submitted on April 21, 2016, by Mike Wintermantel of Pittsburgh, Pennsylvania. This page has been viewed 173 times since then and 9 times this year. Photos: 1, 2. submitted on April 21, 2016, by Mike Wintermantel of Pittsburgh, Pennsylvania.