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2012-08-14_PERMIT FILE - C1996084A
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2012-08-14_PERMIT FILE - C1996084A
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Last modified
8/24/2016 5:05:13 PM
Creation date
10/15/2012 10:55:26 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996084A
IBM Index Class Name
Permit File
Doc Date
8/14/2012
Doc Name
pg 2.05-1 to 2.05-45a
Section_Exhibit Name
Section 2.05 Operation and Reclamation Plans
Media Type
D
Archive
Yes
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Rule 1: Permi(s <br />• (6) Overburden <br />Surface Mine <br />Excess overburden material generated by surface mining activities will be placed in valley fills <br />as shown on Maps 2.05.3-1 and 2.05.3-2 and discussed in Section 2.05.3(2). Materials to be <br />stockpiled are summarized in Exhibit 16. <br />The areas of contour mining in Lorencito Canyon will be backfilled to approximate original <br />contour behind the advancing face. Average stripping ratios will be approximately 10 bcy <br />overburden per ton of coal mined, resulting in excess overburden assuming a 30 percent swell. <br />Cross sections shown in Figures 2.05.4-14a through 2.05,4-14c illustrate proposed fills. These <br />fills are located in areas where they can be constructed at least 100 feet from the main Lorencito <br />drainage and have slopes constructed at 3H:IV for stability. According to the CTL/Thompson, <br />Inc. stability analysis (attached) these slopes will exceed the minimum 1.3 factor of safety. In <br />addition, the side drainage for these fills have been designed to pass a 100-year, 24-hour, storm <br />event to assure stability. <br />Reclamation will follow mining in a cyclic plan, with overburden and topsoil back-hauled as it is <br />mined, once the original box cuts are constructed. Use of a long term or permanent stockpiles <br />will be minimized. <br />Surface Blasting Plan <br />• LCC will engage in blasting and blast casting of overburden. LCC, in conducting surface <br />blasting activities, will comply with all applicable State and Federal laws in the use of explosives <br />and requirements of Section 4.08 of the Boazd's regulations in consultation with appropriate <br />State agencies (Section 4.08.0(1)). All surface blasting activities will be conducted by <br />experienced, trained and competent persons that understand the hazards involved with <br />explosives. The person responsible for blasting operations will be familiar with the blasting plan <br />and any site-specific performance standards. The blaster and at least one other person will be <br />present at the firing of a blast. Each person responsible for blasting operations will possess a <br />valid certification in accordance with appropriate Federal and State laws (Section 4.08.1(3)). <br />Because blasting operations will be conducted within 500 feet of an active underground mine, <br />the blast plan will be prepared and signed by a certified blaster before blasting operations shall <br />begin. The general sequence for drilling and blasting of overburden will be as follows: <br />1. Establish drill bench on the overburden; <br />2. Drill the blasting pattern; <br />3. Load drill holes with explosives; <br />4. Blast overburden; <br /> <br /> <br />Page 2.0536 Rule 2 Pem~its (1ua27.02).doc 2.05-36 (Revised 7/09/02) <br />~~ <br />
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