
Source Public Domain (Original source:Andrews, E. Benjamin. History of the United States, volume V. Charles Scribner’s Sons, New York. 1912)
On 31 May 1889, a terrible flood devastated the town of Johnstown, Pennsylvania. A catastrophic failure of a dam on the Little Conemaugh River, approximately 14 miles upstream of the town occurred. Several days of heavy rains resulted in a large volume of water in the Lake Conemaugh reservoir. It is estimated 20 million tons of water were unleashed when the dam broke. Scientists believe today the volume of water released through the narrow valley to the town temporarily equaled the flow of the Mississippi River.
It took 57 minutes for the water to traverse the distance to Johnstown, whose citizens were unaware the dam had burst. Several towns along the way were hit by the raging waters along the way. Debris included livestock, homes, railroad cars and whatever it picked up along the way. It was temporarily stopped at the Conemaugh Viaduct, a 78-foot railroad bridge but it gave way allowing the flood to resume. This is believed to have made the flood stronger and thus hit Johnstown traveling at 40 mph and reaching 60 feet in height. People who managed to flee to high ground, whether it be in attics or racing to higher ground, generally survived. Many were crushed by falling debris or hit by debris within the flood surge. A second surge to hit Johnstown occurred when flood waters that had been stopped by debris at Stone Bridge gave way and entered the town from a different direction.

Unknown Artist, 1890
Reproduced from a lithograph print published by Kurz & Allison Art Publishers,Chicago Ill.
Public Domain via Wikimedia Commons
When it was all over, Johnstown had been devastated and the death toll stood at 2,209. This made it the largest single loss of life up to that time. 99 families died, 396 children. Many widows, widowers, and orphan children resulted from the tragedy. Some remains were never identified and buried in “Plot of the Unknown” in Grandview Cemetery in Westmont. Property damage was extensive with homes and industry damaged. The American Red Cross, newly founded in 1881 by Clara Barton, assisted survivors and stayed for five months. Although significant improvements have been made to protect residents of the area from floods, they still occasionally threaten and cause damage to property and life. The last major catastrophe occurred in 1977 when severe thunderstorms caused the river to rise and reaching heights of 8 feet and more. 78 people died in the area and $200 million in property damage occurred.
The dam that failed was on the South Fork Fishing and Hunting Club property whose members were affluent and prominent citizens. Many believed the club had failed to properly maintain the dam. Its lawyers, also members of the club, argued that the disaster was an Act of God. The liability laws of the time were limited, and the club was found not liable for the flood. Several millionaires who were members did, however, contribute relief funds for the town. Andrew Carnegie would build a new library for the town.
One of those who would move to Johnstown after the flood was my great-grandfather who was involved in helping to rebuild. My grandfather was born there and spent some of his youth there (the family would later relocate to Spokane, Washington). Years later my grandfather would see how that damaged people. A young woman came to live in Leavenworth, Washington where he worked as a bank cashier. The young woman, as he found out, was a Johnstown Flood orphan. She did not know her full birth name or who her family was. The Johnstown Flood had destroyed the building where all the legal documents, including birth certificates, had been stored. A sobering reminder of how these tragedies reach into lives with long lingering consequences.
Sources
“Johnstown Flood National Memorial (U.S. National Park Service),” accessed May 30, 2025, https://www.nps.gov/jofl/index.htm.
“Johnstown Flood Museum – Heritage Johnstown,” Heritage Johnstown, last modified January 26, 2025, accessed May 30, 2025, https://www.heritagejohnstown.org/attractions/johnstown-flood-museum/.
“Pennsylvania Highways: Johnstown Flood,” accessed May 30, 2025, https://www.pahighways.com/features/johnstownflood.html.
“Three Rivers Tribune – Google News Archive Search,” accessed May 30, 2025, https://news.google.com/newspapers?id=0AhmAAAAIBAJ&sjid=148NAAAAIBAJ&pg=4517,501538&dq=valley+of+death+johnstown&hl=en.
Revision Note: The was updated for 2025 with updated sources. Corrections in punctuation and grammar were also made. A revised version was posted on X.
Suggested Reading
Jim Gallagher, The Johnstown Flood (Chelsea House Pub, 1999).
David McCullough, Johnstown Flood (New York?: Simon and Schuster, 1968).
Michael R. McGough, The 1889 Flood in Johnstown, Pennsylvania, 2002.
Al Roker, Ruthless Tide: The Heroes and Villains of the Johnstown Flood, America’s Astonishing Gilded Age Disaster (William Morrow Paperbacks, 2019).
James Smith, The Flood That Changed Everything: The History of the Great Johnstown Flood Disaster(Famous Disasters For Kids) (Independently published, 2025).
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