Michael O'Shaughnessy
Michael Maurice O'Shaughnessy (28 May 1864 – 12 October 1934) was an Irish civil engineer who became city engineer for the city of San Francisco during the early twentieth century and developed both the San Francisco Municipal Railway (Muni) and the Hetch Hetchy water system. He is sometimes credited as being "the Irishman who built San Francisco." == Early life, education, and immigration == O'Shaughnessy was born to farmers Patrick and Margaret (née O'Donnell) at the family cottage named Jointer in Loughill Parish, County Limerick, Ireland on May 28, 1864; he was one of nine children.