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2013-01-04_REVISION - M1977193
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2013-01-04_REVISION - M1977193
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Last modified
6/15/2021 5:45:58 PM
Creation date
1/7/2013 3:23:09 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1977193
IBM Index Class Name
REVISION
Doc Date
1/4/2013
Doc Name
AMMENDMENT APPLICATION
From
TEZAK
To
DRMS
Type & Sequence
AM5
Email Name
TAK
Media Type
D
Archive
No
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EXHIBIT D Mining Plan <br />1 <br />The mining plan shall supply the following information, correlated with the affected lands, map(s) and <br />timetables: <br />(a) description of the method(s) of mining to be employed in each stage of the operation as related to any <br />surface disturbance on affected lands; <br />MINE PLAN REVISIONS FOR USBLM LEASED LANDS, PERMIT #M - - 193 <br />Mining will commence in 2012 from the southeastern corner of the USBLM lease area with surface <br />leveling and bench development work from the top of existing highwall at boundary line 660' west <br />and 660' north of the southeast corner of the lease area Leveling for mine benches will proceed <br />from the highwall contact working west towards the west boundary of the lease area. The ten -acre <br />area of leveling and bench development will likely take place in two or more stages over the next 1 -3 <br />years. The southeastern corner of the lease area will be accessed from a roadway developed from <br />T.H.E. mine property along the central portion of the active mining zone north of largest highwall <br />face currently exposed along the western boundary of T.H.E. property with USBLM lease lands <br />(lease land in question). <br />Bulldozers and excavators will be used to build access roads and level terrain for production drilling. <br />Conventional hard rock surface mining techniques will be employed using percussion drilling <br />equipment to drill 6" holes for bench development of 40'high and 30' wide for final highwall <br />benches. During the active phase of highwall mining, bench heights of 40' and bench width of 20' <br />will be used. The larger bench widths for final highwall configuration have been suggested to <br />improve machine access if ever necessary to clean excessive rock fall and maintain desired storm <br />drainage patterns along the toe of the mine benches. <br />Tezak Heavy Equipment typically schedules a few large production blasts rather than many small <br />production rounds. Tonnage of typical production blasts are about 150,000 tons of granitic material <br />per shot, meaning that production blasting occurs three to eight times per year. The current blasting <br />schedule and specific state -of -the -art, non - electric, sequentially delayed blasting initiation system <br />will be continued. Blasting patterns of 15'x15' burden and spacing are typically used and loading <br />factors normally run from .25 -.35 #explosive per ton rock blasted. There have been no complaints or <br />concerns regarding blasting controls at this site over the past number of years. It is a priority for <br />T.H.E. Aggregate Source to maintain and continue the good operating history regarding blasting <br />noise and vibration control during blasting operations. Each round is planned, loaded, and shot by a <br />licensed blaster. All production rounds are recorded for noise and ground vibration levels and <br />documented for blast layout and loading pattern. All blasting operations are performed within the <br />guidelines of the Technical Revision #3, Blasting Monitoring Program which was approved by DMG <br />in 1996. Please refer to the mine file for the details of this blasting control program. <br />Once a sufficient area on top has been leveled/benched, drilling operations will commence from the <br />existing highwall face west to a location suitable for shot size and face development. <br />Mine Bench Details <br />As mentioned earlier, final mine bench dimensions will be 40' high and 30' wide, with a 1% grade <br />along lateral bench reaches to nearest side drainage and 1% grade from outer edge of bench to base <br />
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