File:Appendix to the Journals of the Senate and Assembly of the session of the Legislature of the State of California (1917) (14784107535).jpg

Identifier: appendixtojourna19177cali (find matches)
Title: Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California
Year: 1853 (1850s)
Authors: California. Legislature
Subjects: Legislative journals
Publisher: Sacramento : State Printing
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
with an average value of $3.60 per ton. Workhas been opened up through two vertical shafts, main working shaftbeing the Cross shaft with a depth of 1470 feet; 1100 feet north ofCross shaft on 1400-foot level winze 700 feet deep to 2100-foot level; CALAVERAS COUNTY. Ill 1600-foot crosscut from 1500-foot level connects Utica workings withGold Cliff workings on 2400-foot level. The Stickles shaft, which hasa depth of 1000 feet, is used only for lowering timbers; also as ^nemergency pumping shaft. The water is handled from this shaft by a6-mch 6-stage centrifugal pump, driven by 200 h.p. motor. Thereare over 100 miles of underground workings on this property. Theore is hoisted through Cross shaft (3-compartment, 7 x 16 in the clear)in 4-ton skips by a 600 h.p. double conical drum hoist run by waterpower, and dumped at the head of shaft over a grizzly of 3 roundiron bars. 10 long, placed If apart and set at an inclination of40^. At lower end of grizzly the rock passes to 10 x 26 Sturtevant
Text Appearing After Image:
Hep.dframe at Cross shall, Uiica Mining Company, Angels Camp, Calaveras County, California. Photo by W. W. Bradley. crusher. The crusher and grizzly are set over a 50-ton bin from whichthe ore is conveyed to mill by electric tram to 200-ton capacity bins.Mining and development are carried on with air drills, air supplied bythree compressors, one run by water power, and two by electric power,including a new Laidlaw-Dunn-Gordon (size 22 x 24, 14x24)2-stage compressor. Water is hoisted out of this shaft by water skipof 1500 gallons capacity. Utica Mill: 60 stamps, weighing 1000 pounds per stamp, dropping7 inches at 104 drops per minute and crushing 5 tons per stampthrough No. 1 punched screen. Pulp concentrated on thirty-six 4-footFrue vanners. Mill is driven by 150 h.p. motor. Power furnishedby Union Water Company, which is controlled by Utica MiningCompany, at a cost of $2 per h.p. An extraction of 85% is made in 112 MINES AND MINERAL RESOURCES. amalgamation and concentration Avith a l

Note About Images