William Mulholland

William Mulholland: The Engineer Who Built and Broke a City's Water Supply

At the inauguration of the Los Angeles Aqueduct in 1913, William Mulholland turned to the crowd gathered at the Cascades and said four words: "There it is. Take it." Fifteen years later, standing before a coroner's jury investigating a flood that had just killed hundreds of people, he said something very different — "you just fasten it on me" — and the same self-taught engineer who had built modern Los Angeles spent his final years in the ruin of that admission.

A Runaway from Belfast

Mulholland was born September 11, 1855, in Belfast to Dubliner parents Hugh and Ellen. His mother died when he was seven; his father remarried three years later. Poor marks and a beating from his father sent him running to sea at fifteen, and he spent four years in the British Merchant Navy aboard the Gleniffer, crossing the Atlantic at least nineteen times. He came ashore in New York in 1874, drifted through Great Lakes freighter work and lumber camps, nearly lost a leg to a logging accident in Michigan, and in December 1876 stowed away with his brother Hugh on a ship bound for California — a stunt discovered in Panama that forced the brothers to walk more than 47 miles through jungle to reach the Pacific side. He arrived in Los Angeles, a dusty town of about 9,000 people, in 1877.

From Well-Digger to Water Superintendent

Mulholland's first Los Angeles job was digging a well; after a stint prospecting for gold on the Colorado River, he was hired as a deputy zanjero — a ditch-tender — for the Los Angeles City Water Company under Frederick Eaton. In 1880 he laid the city's first iron water pipeline. He left briefly for the Sespe Land and Water Company, taking twenty acres as pay, then returned to the water company in 1886 as superintendent the same year he became a naturalized American citizen. Entirely self-educated in engineering — reading textbooks by lamplight rather than attending a university — he rose with the city itself: when Los Angeles declined to renew the private water company's contract in 1898, the new municipal Water Department made him superintendent, and by 1911 he was chief engineer of what became the Bureau of Water Works and Supply. His governing conviction was blunt: "If you don't get the water, you won't need it."

Reaching Two Hundred Miles for the Owens Valley

Mulholland and Mayor Frederick Eaton set their sights on the Owens Valley, roughly 230 miles to the northeast, where snowmelt from the Sierra Nevada ran to waste as far as Los Angeles was concerned. Between 1902 and 1905 the two men used methods historians have since called deceptive — understating to the public how much water Los Angeles already had, while telling Owens Valley landowners the city intended only modest use — to lock up water rights ahead of a competing federal reclamation project. Appointed chief engineer of the Los Angeles Aqueduct in 1906, Mulholland directed its construction from 1907 to 1913: 233 miles of pipe, siphon, and tunnel, 164 tunnels in all, built by as many as 3,900 workers at peak, a project contemporaries compared in difficulty to the Panama Canal. He also pioneered a hydraulic-sluicing method for building the Silver Lake Reservoir dam in 1906 that engineers later borrowed for the Panama Canal's own Gatun Dam. Water reached the San Fernando Valley on November 5, 1913. In gratitude, the University of California, Berkeley awarded him an honorary doctorate the following year inscribed: "He broke the rocks and brought the river to the thirsty land." The aqueduct's water fueled a wave of annexations that, by 1926, had doubled the city's land area and made Los Angeles the largest city by area in the country.

The Valley That Paid the Price

The water that built Los Angeles emptied the Owens Valley. What locals had called "the Switzerland of California" turned to dust; Owens Lake was dry by 1924. Ranchers and farmers, feeling cheated of the modest water use they had been promised, rebelled — seizing the Alabama Gates spillway and dynamiting the aqueduct itself at Jawbone Canyon, shutting off the city's water for four days. The revolt collapsed only after the Inyo County Bank, which had bankrolled valley resistance, failed in 1927 amid an embezzlement scandal. The episode became known as the California Water Wars, and it left a permanent mark on how the American West argues over water rights.

The St. Francis Dam Collapse

Mulholland's career ended in a single night. On March 12, 1928, roughly twelve hours after he and his assistant, Harvey Van Norman, had personally inspected it, the St. Francis Dam in San Francisquito Canyon gave way, releasing nearly 12.4 billion gallons in a wall of water 140 feet high moving at 18 miles per hour. It obliterated a power plant, killed at least 431 people — more than a hundred of them children — and carried debris 54 miles to the Pacific Ocean. At the coroner's inquest Mulholland accepted the blame without qualification: "Whether it is good or bad, don't blame anyone else, you just fasten it on me." The jury found no criminal responsibility but cited errors of engineering judgment, including a late twenty-foot increase in the dam's height without a matching widening of its base. He retired that November and lived the rest of his life in seclusion, working on an autobiography he never finished, though he was consulted late in life on the Hoover Dam and Colorado River Aqueduct. He died of a stroke on July 22, 1935, and is buried at Forest Lawn Memorial Park in Glendale.

Why William Is Called a Genius

Mulholland's reputation rests on brute practical intelligence rather than formal training or theoretical insight — a man who never attended engineering school teaching himself by lamplight to move a river 233 miles across desert and mountain using nothing but gravity, a feat contemporaries measured against the Panama Canal. That is a genius of execution: sequencing thousands of workers and 164 tunnels to a fixed deadline, and inventing construction methods, like hydraulic sluicing for dam-building, good enough that Panama Canal engineers later copied them. But the honest counter-case is severe and well documented: the same self-taught confidence that built the aqueduct led him to raise the St. Francis Dam's height without widening its base, and that miscalculation killed more than 400 people in a single night. Historian William Kahrl's judgment — that Mulholland's failures discredited the very principles of public water development he had championed — is the sober correction to any tidy hero narrative. He was a brilliant self-made builder whose confidence eventually outran his caution.

Legacy

Los Angeles still carries his name on a dam, a drive, a highway, and a middle school, and the aqueduct he built still supplies the city today. But his story also endures as American infrastructure's cautionary tale — echoed loosely in the 1974 film Chinatown — a reminder that the engineer who moves a river and the engineer who miscalculates a dam's foundation can be the very same man.

Achievements

• Notable work: St. Francis Dam
• Notable work: Los Angeles Aqueduct
• Affiliated with Los Angeles Department of Water and Power
• Worked as engineer and civil engineer