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Los Angeles pipe rupture: A look at the numbers

A torrent of water spewed from a nearly century-old pipe that burst in Los Angeles, shutting down a section of Sunset Boulevard and inundating the campus of UCLA. Here are some of the numbers behind Tuesday's rupture: — Some 8 million gallons spilled from the pipe over nearly 3½ hours, at a rate of 38,000 gallons per minute. — The water main is a 30-inch riveted steel pipe that delivers water at a high velocity from Upper Stone Canyon Reservoir. It was installed in 1921. — The amount of water that spilled is enough to fill more than 500 average-sized backyard swimming pools, or about 200,000 bathtubs. — It's enough water to serve more than 52,500 Los Angeles Department of Water and Power customers in a single day. — When the pipe is operational, water flow is estimated at 75,000 gallons per minute. — The Department of Water and Power's aging, 7,200-mile water system provides approximately 500 million gallons of water to customers each day. About 2 percent of that total was lost Tuesday. — In 2009, a team of analysts found 90 percent of the department's ruptures happened in cast-iron pipes that were corroded. — When Gov. Jerry Brown declared a state drought emergency in January, he asked California residents and businesses to voluntarily reduce their water consumption by 20 percent.

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