Jacksonville was a California Gold Rush mining community located on the Tuolumne River of southwest Tuolumne County. The original alignments of California State Route 49 and California State Route 120 both once passed through the town site of Jacksonville. Jacksonville was razed during 1967-71 to make way for the expanded Don Pedro Lake which inundated the town site. Featured as the cover photo is California State Route 49 and California State Route 120 near Jacksonville as seen in the July/August 1963 California Highways & Public Works. Below the original alignments of California State Route 49 and California State Route 120 in the Jacksonville area can be seen contrasted to the modern highway alignments.
Part 1; the history of California State Route 49 and California State Route 120 in Jacksonville
Jacksonville was a community located on the Tuolumne River in southwest Tuolumne County. Jacksonville was settled during Spring 1849 by Julian Smart along a location on the Tuolumne River which became a hot bed of mining activity. Jacksonville was named in honor of Colonel Alden Jackson who settled in the community during Autumn of 1849. Jacksonville obtained Post Office Service during October 1851 and is reported to have had a census population of 252. Unlike many other Gold Rush era mining towns Jacksonville would remain relevant into the onset of American involvement in World War II due to the prospects of the Eagle-Shawmut Mine.
Jacksonville can be seen in southwest Tuolumne County the 1857 Britton & Rey's Map of California.
Immediately north of the James E. Roberts Memorial Bridge there is an overlook of Don Pedro Lake which faces the former site of the community of Jacksonville. The New Don Pedro Dam expanded the Don Pedro Reservoir by replacing the 1924 concrete Don Pedro Dam.