. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. ith the market demands. Crushed rock is delivered in SanFrancisco at $ per cubic yard, or it is sold at the quarry pier at90 cents to $1. These prices are for large tonnages. The company has six barges with capacities of 400 to 600 tons 600-ton barge (see photos No. 120 and No. 121) is self-dischargingand carries a crew of five men. In the hold there is a dynamo run by a50 gasoline engine. This furnishes power for the motor drivingthe conveyer belt under the
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. ith the market demands. Crushed rock is delivered in SanFrancisco at $ per cubic yard, or it is sold at the quarry pier at90 cents to $1. These prices are for large tonnages. The company has six barges with capacities of 400 to 600 tons 600-ton barge (see photos No. 120 and No. 121) is self-dischargingand carries a crew of five men. In the hold there is a dynamo run by a50 gasoline engine. This furnishes power for the motor drivingthe conveyer belt under the pockets and the motor at the head of thebucket elevator. The bucket elevator can be raised and lowered andswung sideways on an arc so as to vary the point and height of dis^ 260 MINES AND MINERAL RESOURCES. charge as required. It is stated that this barge cost $40,000 to buildand equip. From 4 to 5 hours are required to load 500 cubic yardsinto it by derrick, but at the San Pablo quarry (Contra CostaCounty) of the same company, the same amount is loaded by two con-veyer belts in IJ hours. Bibl.: Bull. 38, p. Photo No. 122. Two hundred-foot high quarry face of San Francisco Quarries Company, Marin County, California. The San Rafael Development Company has a quarry of red rock atthe end of Mission street (Pine Hill), San Rafael, but it has not beenoperated recently. Short Ranch Quames. Dodge & Croker, San Anselmo, and the Ray-mond Land Company, 1048 Mills Building, San Francisco, each hasa small quarry on land formerly a part of the Short ranch, 1 milenorth from San Anselmo. They are both operated intermittently, andthe product is used for curbs and rubble walls, being sold at $2 to $5 MARIN COUNTY. 261 per load (about 2 cubic yards). The rock is a blue metamorphic sand-stone. Steffini-Bartini Company (see Hotaling). Tihuron Point Quarry (see Northwestern Pacific Railroad Com-pany). Western Development Syndicate (see San Francisco Quarries Com-pany) . Wetmore Bros, (see Da
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