By 1900, the population was nearing 900 and the locals pushed out the Tamalpais Land &amp; Water Co. in favor of incorporation. Organizations and clubs cropped up including the Outdoor Art Club (1902) (organized by Laura Lyon White), Masonic Lodge (1903) which celebrated its centennial in 2003 and the Dipsea Race (1905), the latter marking its 100th anniversary in 2010. The second big population boom came after the 1906 Great earthquake. While much of San Francisco and Marin County was devastated, many fled to Mill Valley and most never left. In that year alone the population grew to over 1,000 permanent residents. Creeks were bridged over or dammed, more roads laid down and oiled, and cement sidewalks poured. Tamalpais High School opened in 1908, the first city hall was erected in 1908, and Andrew Carnegie's library in 1910. The Post Office opened under the name "Eastland", however after many objections it was changed to "Mill Valley" in 1904. The very first Mountain Play was performed at the Mountain Theater on Mt. Tam in 1913.