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HYDRO21519
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HYDRO21519
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Entry Properties
Last modified
8/24/2016 8:42:57 PM
Creation date
11/20/2007 2:21:13 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
Hydrology
Doc Date
4/24/2003
Doc Name
2003 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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BOWIE RESOURCES LIMITED <br />BOWIE N0. 2 MINE <br />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 />impoundments located at the Bowie No. 2 Mine. <br />On March 31, 2003 I performed the required yearly inspection. I, J. E. Stover, have a <br />wide variety experience of in the design and construction of earth fill embankments. <br />Nothing was observed during the inspection that would indicate the ponds have 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 monthly and yearly inspections. There are no aspects <br />which might affect stability. <br />Pond B had a pool of water near the elevation of the primary spillway at approximate <br />elevation of 5944, two feet deep. Sediment has accumulated on the west end of pond <br />B. It is estimated that Pond B has about 50% of its sediment capacity remaining. <br />The water level of Pond C was above the primary spillway at approximate elevation of <br />5997, seven feet deep, three feet below the level of the emergency spillway. Because <br />of the water level in the pond, it is not possible to determine the sediment level. Since <br />the sediment was recently removed from Pond C, it will be assumed the pond has <br />100% of its as-built sediment capacity. Pond C should be dewatered. <br />Pond D had a small pool of water a few inches deep at about elevation 5970. The <br />sediment level was about 2 feet below the elevation of the primary spillway. The design <br />of the pond calls for 3-feet of sediment storage, therefore Pond D contains about 66% <br />of its design sediment capacity. <br />Pond J was dry with no apparent sediment build-up. Pond K was damp to dry with an <br />estimated 10% sediment build-up. <br />There was no discharge from any of the pond/impoundments. <br />
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