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GENERAL33746
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Last modified
8/24/2016 7:55:33 PM
Creation date
11/23/2007 7:43:23 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977410
IBM Index Class Name
General Documents
Doc Date
10/25/1993
Doc Name
BOULDER MILL SECTIONS 22 & 23 TIN R70W BOULDER CNTY
From
HENDRICKS MINING
To
MLRD
Media Type
D
Archive
No
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Hendricks Mining Co., Inc. <br />Caribou, Colorado <br />(~eirrruyr/rte ~rose•, vr'o/n!.,lliie• Jrirce• ~79 <br />December 4, 1989 <br />Mr. John Doerfer <br />Mined Land Reclamation Division <br />215 Centennial Building <br />1313 Sherman St. <br />Denver, CO 80203-2273 <br />Dear John: <br />~E~~~l~E~ <br />D E C 5 1999 <br />MINED I,.ANU <br />RECLAMATION D)vIRtON <br />I am planning a small mill test at our Boulder Mill facility this <br />December. I plan to mill approximately 257 tons of gold/silver <br />ore that I mined last fall from the Apache Vein at our Cross Gold <br />Mine. This small mill test will be designed to bulk sample the <br />initial ore run and to provide metallurgical data. C will be <br />making a flotation concentrate which will be shipped to Cominco <br />smelter in Trail, B.C. The flotation process will only use <br />minute amounts of pine oil and Z-11 (biodegradable X~snthate) . <br />I will be maintaining a pH in the mill water of 9 with soda ash. <br />The tailings will be deposited in a small excavated basin in <br />impervious Pierre shale. There will be no water discharge and <br />the water will evaporate. Upon completion of the mill test, I <br />plan to cover the tailings sand with several feet of Pierre <br />shale. I will be doing a composite sample of the tailings sand <br />for future reference. Last summer, I allowed Western Mobile <br />Pre-Mix to deposit several thousand yards of Pierre shale <br />immediately west of this small tailings pond. I will use this <br />material to cover the sand. I have enclosed photographs showing <br />the deposition site. The large uplift north of the pond is the <br />impervious basalt dike. <br />If this small mill test works successfully, Hendricks Mining will <br />make application by February to build a new tailings pond area at <br />the Boulder Mill to accommodate 2,000 to 3,000 tons of tailings <br />deposition which, upon approval, would start next April. I will <br />come in to meet with you sometime in January to discuss what is <br />required for such a permit. If you have any questions or require <br />any additional information, please feel free to contact me. <br />Mailing Address: Post Office Box 653-Caribou • Nederland, Colorado 80466-0653 <br />Phone; Office-Boulder 303443-1502 Mine 303-258-3806 Fax u 303-443-6601 <br />
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