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2009-03-06_REVISION - M1983141 (5)
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2009-03-06_REVISION - M1983141 (5)
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Entry Properties
Last modified
6/16/2021 6:25:30 PM
Creation date
4/15/2009 2:24:50 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1983141
IBM Index Class Name
REVISION
Doc Date
3/6/2009
Doc Name
Submittal-Cash Mine Borehole Non-Tributary Determination Support Information
From
Mount Royale Ventures, LLC
To
DRMS
Type & Sequence
TR6
Email Name
ACS
Media Type
D
Archive
No
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Non-Tributary Support: Cash Mine Borehole AdrianBrown <br />1. INTRODUCTION <br />Mount Royale Ventures, LLC ("MRV") is applying for a permit to withdraw and beneficially use non- <br />tributary water from the Cash Mine (Dewatering) Borehole under 37-90-137(7) C.R.S. This report has <br />been prepared by Adrian Brown, P.E., acting as authorized agent for MRV (Attachment 1). The report <br />provides support geohydrology information for the Form GWS-45 General Purpose Water Well <br />Application for this permit, to which it is appended. <br />2. BOREHOLE <br />2.1 Location <br />The Cash Mine Borehole is located in Boulder County, approximately 7 miles west-northwest of <br />Boulder. It is located in the NW '/4 of the SE '/4 of Section 12, Township IN, Range 72W of the 6th <br />Principal Meridian. The location of the borehole is shown in Plate 1. Also shown on Plate 1 is the <br />location of the land owned or controlled at the site by MRV. Details of the land ownership are provided <br />in Attachment 2. <br />The Cash Mine is a gold mine, which has been operated intermittently since the late 1800s. MRV has <br />undertaken exploration for additional reserves, and is proposing to restart mine production in early <br />2007. <br />2.2 Cash Mine Borehole <br />The borehole was drilled into the Cash Mine for a previous mine operator in September-October 1998 <br />for the purpose of dewatering the mine. It is not known to be registered with the State of Colorado. The <br />borehole was completed to a depth of 552 feet below collar elevation (8106.84 ft msl), which is <br />equivalent to the #7 Level of the mine. The borehole location is shown relative to the overall property <br />area on Plate 1, and relative to the mine area on Plate 2. The completion is shown relative to the existing <br />Cash Vein workings in section in Plate 4. <br />The borehole is lined with 6" diameter welded steel casing, cemented from top to bottom with neat <br />cement grout. The borehole terminates in Level 7 of the mine, at an approximate elevation of 7553 ft <br />msl (552 feet below collar). The bottom of the hole is open to the mine void, and there is no screen. <br />2.3 Geology <br />No geologic log was apparently retained during the drilling of the borehole. Based on the geologic <br />information from the adjacent mine, and from Gable (1980)1, the hole is located in Precambrian Boulder <br />Creek Granodiorite for its entire length. This rockmass is grey, pinkish gray to black and white medium- <br />grained to very coarse grained locally porphyritic rock composed of microcline, plagioclase, and quartz, <br />and lesser amounts of biotite and hornblende. <br />"Geologic Map of the Gold Hill Quadrangle, Boulder County, Colorado", Dolores J. Gable, Department of Interior, United States <br />Geologic Survey, Geologic Quadrangle Map CQ-1525, 1980. <br />1601A-20070125 1
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