Minutes before midnight on the evening of March 12, 1928, the St. Francis Dam collapsed. The dam's 200-foot concrete wall crumpled, sending billions of gallons of raging flood waters down San Francisquito Canyon, sweeping 54 miles down the Santa Clara River to the sea, and claiming over 450 lives in the disaster. Captured here in over 200 images is a photographic record of the devastation caused by the flood, and the heroic efforts of residents and rescue workers. Built by the City of Los Angeles' Bureau of Water Works and Supply, the failure of the St. Francis Dam on its first filling was the greatest American civil engineering failure of the 20th century. Beginning at dawn on the morning after the disaster, stunned local residents picked up their cameras to record the path of destruction, and professional photographers moved in to take images of the washed-out bridges, destroyed homes and buildings, Red Cross workers giving aid, and the massive clean-up that followed. The event was one of the worst disasters in California's history, second only to the San Francisco Earthquake and Fire.

Minutes beforeÊmidnightÊon March 12, 1928, the St. Francis Dam collapsed, sending more than 12 billion gallons of water surging through CaliforniaÕs Santa Clara Valley and killing some 400 people, causing the greatest civil engineering disaster in twentieth-century American history. This extensively illustrated volume gives an account of how the St. Francis Dam came to be built, the reasons for its collapse, the terror and heartbreak brought by the flood, the efforts to restore the Santa Clara Valley, the political factors influencing investigations of the failure, and the effect of the disaster on dam safety regulation. Underlying all is a consideration of how the damÑand the disasterÑwere inextricably intertwined with the life and career of William Mulholland.Ê

Minutes before midnight on March 12, 1928, the St. Francis Dam collapsed, sending more than twelve billion gallons of water surging through Southern California’s Santa Clara Valley, killing some four hundred people and causing the greatest civil engineering disaster in twentieth-century American history. In this carefully researched work, Norris Hundley jr. and Donald C. Jackson provide a riveting narrative exploring the history of the ill-fated dam and the person directly responsible for its flawed design—William Mulholland, a self-taught engineer of the Los Angeles municipal water system. Employing copious illustrations and intensive research, Heavy Ground traces the interwoven roles of politics and engineering in explaining how the St. Francis Dam came to be built and the reasons for its collapse. Hundley and Jackson also detail the terror and heartbreak brought by the flood, legal claims against the City of Los Angeles, efforts to restore the Santa Clara Valley, political factors influencing investigations of the failure, and the effect of the disaster on congressional approval of the future Hoover Dam. Underlying it all is a consideration of how the dam—and the disaster—were inextricably intertwined with the life and career of William Mulholland. Ultimately, this thoughtful and nuanced account of the dam’s failure reveals how individual and bureaucratic conceit fed Los Angeles’s desire to control vital water supplies in the booming metropolis of Southern California.

The St. Francis Dam was built in San Francisquito Canyon to provide additional storage for the Los Angeles - Owens River Aqueduct. On the night of 12/13 March 1928, it failed catastrophically, killing about 450 people in the San Francisquito and Santa Clara River valleys.

“I’ve been thinking a lot about Cadillac Desert in the past few weeks, as the rain fell and fell and kept falling over California, much of which, despite the pouring heavens, seems likely to remain in the grip of a severe drought. Reisner anticipated this moment. He worried that the West’s success with irrigation could be a mirage — that it took water for granted and didn’t appreciate the precariousness of our capacity to control it.” – Farhad Manjoo, The New York Times, January 20,2023 "The definitive work on the West's water crisis." --Newsweek The story of the American West is the story of a relentless quest for a precious resource: water. It is a tale of rivers diverted and dammed, of political corruption and intrigue, of billion-dollar battles over water rights, of ecological and economic disaster. In his landmark book, Cadillac Desert, Marc Reisner writes of the earliest settlers, lured by the promise of paradise, and of the ruthless tactics employed by Los Angeles politicians and business interests to ensure the city's growth. He documents the bitter rivalry between two government giants, the Bureau of Reclamation and the U.S. Army Corps of Engineers, in the competition to transform the West. Based on more than a decade of research, Cadillac Desert is a stunning expose and a dramatic, intriguing history of the creation of an Eden--an Eden that may only be a mirage. This edition includes a new postscript by Lawrie Mott, a former staff scientist at the Natural Resources Defense Council, that updates Western water issues over the last two decades, including the long-term impact of climate change and how the region can prepare for the future.