Fort Laughlin was a Civil War redoubt, built in 1863 for the defense of Pittsburgh by the employees of Jones and Laughlin Iron Works, and named for James H. Laughlin.
[1][2] It was a circular earthwork on Ormsby's Hill, now part of Arlington Park on Arlington Avenue.
[3]40°25′07″N 79°58′30″W / 40.41861°N 79.97500°W / 40.41861; -79.97500[4] Built along the bluffs of the Monongahela River in Pittsburgh, Pennsylvania in 1863 by Jones and Laughlin Iron Works[5] in response to the threatened invasion of Pennsylvania by the Confederate States Army, this circular, earthen, Civil War redoubt was also known as "Fort McKinley" or "Fort Ormsby.
"[1][2] It was located on Ormsby's Hill in what is now Arlington Park, which is located on Arlington Avenue and is bordered by Fernleaf, Salisbury, Sterling, and Fort Hill streets.
[3][4] No remains of the structure were evident as of 2019.