They Were Warned Three Times. 2,209 Died Anyway | The Johnstown Flood, 1889

At 4:07 p.m. on May 31, 1889, a wall of water and wreckage reached Johnstown, Pennsylvania. Fourteen miles up the valley, the South Fork Dam — an earth dam holding back a private lake for a club of Pittsburgh's richest men — had given way. The Johnstown Area Heritage Association counts 2,209 dead. No dam failure in American history has killed more people. Johnstown was warned. Three telegrams went down the valley that afternoon: at about one o'clock, at 1:52, and at 2:45. At three o'clock, Western Union manager Hettie Ogle passed the warning on to Pittsburgh and called it her last message. But the town had heard the same warning spring after spring for years, and every time the dam had held. By then, the dam breaking was a running joke. This documentary follows how that warning wore out: the first breach in 1862 that killed no one, the repairs made with rock, mud, brush, hay and horse manure, the crest cut down for a carriage road, the discharge pipes that were never put back, the screens across the spillway, an engineer's report in November 1880 and the reply that said there was no danger. Then the morning of May 31 — the shovels on the crest, the telegraph tower at South Fork, the Conemaugh Viaduct, John Hess and his locomotive whistle, Woodvale, the Stone Bridge fire — and an investigation, and four lawsuits, that never held anyone responsible. ⏱ Chapters 0:00 4:07 p.m., May 31, 1889 0:23 Johnstown was warned 1:12 The lake above the city 1:43 A dam built for a canal 2:05 How much water? 2:36 A bathtub above the stairwell 2:49 The steel town below 3:11 Do you know your dam? 3:33 "They were warned" — the tidy version 4:24 1862: the first time it broke 5:20 No deaths, no story 5:41 The patch 6:11 A lake for a club 7:11 Rock, mud, hay — and horse manure 7:58 Lowering the rim 8:32 The missing pipes 9:18 Screens across the spillway 9:51 Less than half 10:42 The engineer who went up to look 11:35 "No danger": the reply 12:00 A warning that lived in an office 13:03 Spring after spring 13:27 The car alarm 14:26 Decoration Day, 1889 15:11 May 31: the lake rises 15:51 Two floods 16:02 Hettie Ogle at the key 16:38 Shovels against a lake 17:38 What overtopping does 18:00 No way out 18:34 1:00 p.m.: the first warning 19:22 1:52 p.m.: water over the top 20:03 2:45 p.m.: "may possibly go" 20:47 3:00 p.m.: her last message 21:33 Put yourself in that town 22:06 When did the dam break? 22:56 The lake empties 23:16 South Fork 23:42 The Conemaugh Viaduct 24:21 Mineral Point 24:34 John Hess and the whistle 25:38 Woodvale 26:15 4:07 p.m.: Johnstown 26:54 The Stone Bridge 27:21 Fire on the wreckage 27:44 How many died 29:15 The engineers' report 30:09 In court: "an act of God" 30:44 Charity, not compensation 31:05 Where the warning failed 31:52 The dam above your home In memory of the people of Johnstown, South Fork, Mineral Point, East Conemaugh, Woodvale and the Conemaugh valley who died on May 31, 1889 — and of Hettie Ogle and Minnie Ogle, who stayed at the telegraph key. Have you ever stopped hearing a warning because you'd heard it too many times — a siren test, an alarm, a flood watch? Tell us in the comments — and which dam we should investigate next. They Were Warned — the stories behind the world's most devastating engineering failures. Subscribe for a new investigation every week. #JohnstownFlood #DamDisaster #SouthForkDam