1849 1868 1880 1887 1891 1905 1909 1914 1934 1938 1940 1979 1992 1770s aerials agriculture arroyo calabasas bell creek bridges buildings canoga park chinatown construction destruction downtown drawings el pueblo elysian park engineering farms floods food freeways gardens infrastructure johnson fain labor land lashp los angeles river maps metro gold line mountains native americans nature neighborhoods north broadway north hollywood north spring street people plants railroads reservoirs rivers settlements sidewalks southern pacific stations trains transportation trees tujunga wash union station villages vineland avenue water water wheels william hammond hall workers yards zanja madre