GWIN MINE, PALOMA, AND LOWER RICH GULCH WAS MINED
FOR PLACER IN 1849. QUARTZ WAS DISCOVERED
BY J. ALEXANDER IN 1851. PROPERTY WAS ACQUIRED BY
WILLIAM M. GWIN, CALIFORNIA'S FIRST U.S. SENATOR, IN 1851.
THE GWIN MINE, CLOSED IN 1908, YIELDED MILLIONS.
Photo courtesy @NoeHill via their historical markers page.