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HYDRO30933
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HYDRO30933
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Entry Properties
Last modified
8/24/2016 8:54:43 PM
Creation date
11/21/2007 12:59:58 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980004
IBM Index Class Name
Hydrology
Doc Date
4/1/2002
Doc Name
2002 Annual Impoundment Inspection
From
J.E. Stover & Associates
To
DMG
Permit Index Doc Type
Prof Pond Certifications
Media Type
D
Archive
No
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LODESTAR ENERGY, INC. <br />McLANE CANYON MINE <br />IMPOUNDMENT YEARLY INSPECTION <br />In accordance with Rule 4.05.9(14), all impoundments shall be inspected at least yearly to <br />determine if the impoundment has been maintained as designed, and in accordance with the <br />approved plan and the applicable regulations. This yearly inspection is for the impoundments <br />located at the McClane Canyon Mine. <br />On March 26 & 28, 2002, I performed the required yearly inspections. I, J. E. Stover, have a <br />wide variety experience in the design and construction of earth fill embankments. Nothing was <br />observed during the inspection that would indicate the ponds have a potential for failure. <br />There was no appearance of erosion, instability, structural weakness or other hazardous <br />conditions. There are no required monitoring procedures or instrumentation. There are no <br />aspects which might affect stability and there is no required maintenance. The sediment pond <br />was dry. The topsoil and excess material stockpile impoundments were dry. The office area <br />impoundment was muddy. No discharge was occurring from any of the impoundments. <br />The inside slopes of the sediment pond were flattened to approximately 2H:1 V during the first <br />quarter 2002. The required water capacity of the sediment pond is 0.54 A-F (ref. PAP Section <br />2.4.1). There is no specific sediment capacity defined for the pond. The actual size of the <br />pond exceeds the required capacity listed in the permit. <br />The sediment pond has the following estimated capacity considering the flattened side slopes: <br />POND CAPACITY -ACRE FEET <br />Water Sediment Total <br />0.57 0.42 0.99 <br />Appendix M lists three small area exemptions where run-off is controlled by a sediment trap. <br />The sediment traps are now categorized as impoundments. <br />SAE-1 -The office area impoundment has a required capacity of 1400 cubic feet. The actual <br />size of the impoundment meets or exceeds the required capacity. <br />SAE-2 The topsoil impoundment has a required capacity of 375 cubic feet. The actual size of <br />the impoundment meets or exceeds the required capacity. <br />SAE-3 The excess material {rip rap) stockpile impoundment has a required capacity of 750 <br />cubic feet. The actual size of the impoundment meets or exceeds the required capacity. <br />To the best of 1v~yijgdge and belief, the impoundments at the McClane Canyon Mine are <br />maintained~~~s~rfetic'$f~ in accordance with the approved plan and applicable regulations. <br />i * I G ~ Z d2_ <br />~,, . James . Std Date <br />~~~7lgrado Prof~~s``(~nal Engineer <br />•.~$~h$,ltgK•l°Id. 19230 <br />
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