William Mulholland (September 11 1855 - July 22 1935) was a water-services engineer in Southern California, United States. He was born in Belfast, Ireland (now Northern Ireland) and emigrated to New York City in the 1870s with his brother Hugh Mulholland and traveled to San Francisco in 1877. Mulholland worked as a miner in Arizona Territory before moving to the city that would build his reputation, Los Angeles. Wikipedia
A man obsessed with an engineering challenge of epic proportions, William Mulholland brought the Owens River to Los Angeles through a combination of determination and deceit. www.pbs.org/weta/thewest/people/i_r/mulholland.htm
The definitive Wikipedia entry for William Mulholland. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/William_Mulholland
