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HYDRO30663
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Entry Properties
Last modified
8/24/2016 8:49:20 PM
Creation date
11/21/2007 12:41:00 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1991078
IBM Index Class Name
Hydrology
Doc Date
2/16/2005
Doc Name
P.E. Certfication for Reconstructed Pond Embankment
From
J.E. Stover & Associates
To
DMG
Permit Index Doc Type
Prof Pond Certifications
Media Type
D
Archive
No
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HONEYWOOD COAL COMPANY <br />HAMILTON MINE <br />IMPOUNDMENT INSPECTION <br />In accordance with Rule 4.05.9(14), impoundments wilt be inspected during <br />construction and upon completion of construction by a qualified registered professional <br />engineer or other qualified professional specialist under the direction of a professional <br />engineer. This certification is for the repair of the embankment of Sediment Pond B <br />located at the Hamilton Mine. <br />During a routine partial inspection performed by the DMG on January 26, 2005, it was <br />noted that settling and erosion of material along the spillway had breached the <br />embankment of Pond B. <br />On January 26, 2005, the DMG issued the Operator a Notice of Violation (CV-2005- <br />001)for failure to construct and/or maintain the embankment for Pond B as necessary <br />to ensure integrity and stability of the pond embankment. The abatement steps were to <br />excavate the failed portions of the embankment and reconstruct the embankment in <br />accordance with approved designs and the applicable requirements of Rules 4.05.6, <br />4.05.9(1), 4.05.9(6), 4.05.9(7), and submit a P.E. certification of the reconstructed <br />pond embankment in accordance with rule 4.05.9(14) to the DMG by February 22, <br />2005. <br />The pond was first dewatered beginning on January 28, 2005. It took approximately <br />five days to dewater the pond. After the pond was dewatered to an acceptable point, <br />the failed portions of the pond embankment were excavated and then reconstructed in <br />accordance with the approved designs and applicable rules with one exception. Anew <br />six inch diameter primary spillway pipe was installed in lieu of the four inch diameter <br />pipe shown on the drawings. An anti-seep collar was installed on the pipe. The <br />reconstruction of the pond embankment was completed on February 4, 2005. <br />On February 4, 2005, I performed the final inspection of the reconstructed pond <br />embankment. I, J. E. Stover, have a wide variety of experience in the design and <br />construction of earth fill embankments. Nothing was observed during the inspection that <br />would indicate the pond has a potential for failure. There was no appearance of <br />erosion, instability, structural weakness or other hazardous conditions. There are no <br />required monitoring procedures or instrumentation other than quarterly and yearly <br />inspections. There are no aspects which might affect stability and there is no required <br />maintenance. The sediment pond had water at the invert of the primary spillway at <br />approximate elevation of 5811. <br />The sediment pond has the following estimated capacity assuming no sediment build- <br />up: <br />~- <br />
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