


(* Please note this list does not include sand or gravel quarries.)
Mine name: Joe Chevreaux; Operator: Joe Chevreaux; Address & County: 890 Grass Valley Hwy., Auburn, CA 95603, Placer County; Phone: (916) 878-1454; Latitude: 39.03, Longitude: -121.03, and Mine location number: Map No. 432; Mineral commodity: Stone.
Mine name: Collet Rocklin Aggregates; Operator: R. C. Collet, Inc.; Address & County: P. O. Box 1146, Rocklin, CA 95677, Placer County; Phone: (916) 786-6015; Latitude: 38.80, Longitude: -121.27, and Mine location number: Map No. 430; Mineral commodity: Stone.
“Jumbo No. 1 Lode & Mill Site. Patented claims in secs. 5 and 6, T. 15 N. R. 11 E., M.D., are in the deep canyon of North Fork of American River on a limestone deposit first located by Sullivan and Linder. They sold it in 1931 to California Lime Association, a California corporation, formed for the avowed purpose of using the limestone from this deposit especially for making carbon dioxide. A large amount of stock was sold but the property was never operated.
“Dan Sullivan, one of the original locators, states the deposit is 300 feet wide at the river and stands 300 feet high. The river at this point is 2000 feet vertically below the railroad and 1 ½ miles south of it. A steep road from Towle passes about a mile away.”
"John McAninch. A deposit of verde antique marble is reported near the Butcher Ranch, on land owned by John McAninch."
“The north end of the large deposit which was productive at the Mountain Quarries in El Dorado County, extends into Placer County. The Middle Fork of American River has eroded this part of the deposit so that no such favorable conditions exist as were found on the El Dorado County side, although there may be a very substantial tonnage below the river level. This part of the deposit extends for about three-eigths of a mile from the river bed to a place on the steep canyon slope only a little above the present-Auburn-Forest Hill road. Total backs above the river are about 300 feet, but the road would prevent working all of it. It is 5 miles by road from Auburn ( Railroad Street ) station.
“The road traverses limestone for a diagonal distance of 228 feet, but the actual width of limestone underground is probably about 160 feet. It was possible to sample a continuous width of 100 feet. This is dark gray, medium-grained, compact and fairly tough limestone, containing enough organic matter to give a faint fetid odor when hammered. The following analysis was reported by Abbot A. Hanks for this sample”
Insoluble, 0.79 percent
Fe2O3 and Al2O3 , 0.59 percent
CaCO3 , 97.44 percent
MgCO3 , 0.29 percent
“Sullivan and McCormick claim is an unpatented location made by Dan Sullivan and McCormick, Alta, on the north end of the same deposit which is partially covered by the Jumbo patent. The limestone is claimed to be of good grade but is undeveloped. It lies less than a mile south of Gorge on the Southern Pacific Railroad but is 1500 feet below the tracks and is said to be 1000 feet below the nearest road which runs to Towle, 3 miles distant. Sullivan states the deposit is 200 feet wide.”
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