. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. ico. The supply of such material is immense. Bechtel-Kaiser Bock Company, Oroville, has recently installed andput in operation a rock crushing plant about two miles south ofOroville. Coast Bock and Gravel Company. Main office Hunter-Dulin Build-ing, San Francisco. The Oroville plant is within the city limits. Itbelongs to Natomas Company of California and is operated under W. Thorne, superintendent. This plant has a daily capacity of 1000 tons of crushed rock and1000
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. ico. The supply of such material is immense. Bechtel-Kaiser Bock Company, Oroville, has recently installed andput in operation a rock crushing plant about two miles south ofOroville. Coast Bock and Gravel Company. Main office Hunter-Dulin Build-ing, San Francisco. The Oroville plant is within the city limits. Itbelongs to Natomas Company of California and is operated under W. Thorne, superintendent. This plant has a daily capacity of 1000 tons of crushed rock and1000 tons of gravel. Crushed rock is produced in standard sizes from2J-inch to dust, gravel i by 2, i by 1 and pea gravel, besideswhich special sizes can be supplied. Rock is loaded by steam shovel and hauled a mile and a half in6-yard and 12-yard cars by gasoline locomotives. The scalping screenseparates rock for the crushers, of which there are one 36 by 24, one36 by 18 and two 36 by 10. The larger rocks go to the first ofthese, while that from two to four inches goes to the 36 by 10 210 REPORT OF STATE MINERALOGIST. Plant of Coast Rock and Gravel Company at Oroville. crushers, and minus 2-inch gravel goes direct to the washing and gravel is stored in bins and stockpiles. There are spur tracksfrom both the Western Pacific and Sacramento Northern men are employed. Johnston Rock Company, Chico. J. E. Johnston, manager. Thisrock crushing plant is utilizing old dredger rock piles left by El OroDredging Company on Butte Creek about a mile and a half from Chico. TALC AND SOAPSTONE These are widely distributed in those parts of the county where thebedrock formations are exposed, but many of the deposits are a con-siderable distance from railroad and are undeveloped. Soapstone isa common mineral in the state and in other counties deposits nearrailroad have supplied the demand, with consumers in a position wherethey can choose from a number of available so
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