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2014-04-08_HYDROLOGY - C1980004
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2014-04-08_HYDROLOGY - C1980004
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Entry Properties
Last modified
8/24/2016 5:41:57 PM
Creation date
4/8/2014 12:44:52 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980004
IBM Index Class Name
Hydrology
Doc Date
4/8/2014
Doc Name
1st Quarter 2014 Impoundment Yearly Inspection
From
J.E. Stover & Associates, Inc
To
DRMS
Permit Index Doc Type
Sediment Pond Inspections
Email Name
ZTT
DIH
Media Type
D
Archive
No
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McClane Canyon Mining, LLC <br />McCLANE CANYON MINE <br />2014 IMPOUNDMENT YEARLY INSPECTION <br />In accordance with Rule 4.05.9(14), all impoundments shall be inspected at least yearly <br />to determine if the impoundment has been maintained as designed, and in accordance <br />with the approved plan and the applicable regulations. This yearly inspection is for the <br />impoundment located at the McClane Canyon Mine. <br />On March 18, 2014, 1 performed the required yearly inspection. I, J. E. Stover, have a <br />wide variety of experience in the design and construction of earth fill embankments. <br />Nothing was observed during the inspection that would indicate the pond has a <br />potential for failure. There was no appearance of erosion, instability, structural <br />weakness or other hazardous conditions. There are no required monitoring procedures <br />or instrumentation other than quarterly and yearly inspections. There are no aspects <br />which might affect stability and there is no required maintenance. The sediment pond <br />had water standing 12 inches below the level of the primary spillway at approximate <br />elevation of 5456. The pond /impoundment was not discharging during the inspection. <br />The required capacity of the sediment pond is 0.55 A -F. The required water capacity of <br />the sediment pond is 0.36 A -F and the required sediment capacity is 0.19 A -F (ref. PAP <br />Section 2.4.1 and Table 4.2 -12). The actual size of the pond exceeds the required <br />capacities listed in the permit. <br />The sediment pond has the following estimated capacity based on the existing water <br />level in the pond: <br />POND CAPACITY - ACRE FEET <br />Water <br />Sediment <br />Total <br />0.67 <br />0.28 <br />0.95 <br />QC, . <br />To the best of my knowledge and belief, t'rhuiitfi!i� ediment pond at the <br />McClane Canyon Mine has been maintai n �as designo; , in accordance with the <br />approved plan and applicable regulatior'"�rr -- <br />James E. Stover e ce <br />Colorado Profession sneer '# <br />Registration No. 19230�•.�Gi. <br />
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