Copperopolis, CA…Firefighters have made quick work of the now 23 acre #DiamondFire [update] A hoselay around the perimeter of the 23 acre vegetation fire has been established. Near Hwy 4 and Main St. Copperopolis (Calaveras County), #DiamondFire Firefighters are aggressively fighting the 20 acre fire and requesting additional resources to assist with the vegetation fire near Hwy 4 and Main St. Copperopolis (Calaveras County)