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HYDRO25820
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HYDRO25820
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Entry Properties
Last modified
8/24/2016 8:45:26 PM
Creation date
11/20/2007 5:56:11 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
Hydrology
Doc Date
5/1/2006
Doc Name
2006 Annual Impoundment Inspection
From
J.E. Stover & Associates Inc
To
DMG
Permit Index Doc Type
Prof Pond Certifications
Media Type
D
Archive
No
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BOWIE RESOURCES, LLC <br />BOWIE NO.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 16, 2006 I performed the required yearly inspection. I, J. E. Stover, have a <br />wide variety experience 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 about 5-feet below the emergency spillway at approximate <br />elevation of 5947, five feet deep. Because of the water level in the pond, it is not <br />possible to determine the sediment level. It is estimated that Pond B has about 75% of <br />its sediment capacity remaining. Pond B should be dewatered. <br />The water level of Pond C was about 4-feet below the elevation of the emergency <br />spillway at approximate elevation of 5996, 6-feet deep. Because of the water level in <br />the pond, it is not possible to determine the sediment level. It is estimated Pond C has <br />had a 25% sediment build-up since it was cleaned out. Pond C should be dewatered, <br />Pond D had water standing 3.7-feet below the elevation of the emergency spillway at <br />approximate elevation of 5976, 4-feet deep. Because of the water level in the pond, it <br />is not possible to determine the sediment level. It is estimated Pond D has had a 50% <br />sediment build-up since it was cleaned out. Pond D should be dewatered. <br />Pond J was snow covered with no apparent sediment build-up. Pond K had about 6- <br />inches of snow and ice cover at an approximate elevation of 5819.5 with an estimated <br />10% sediment build-up. <br />Pond F had about 3 foot of standing water at approximate elevation 5947 with an <br />estimated sediment build-up of 10%. <br />Pond C was being dewatered at the time of the inspection. <br />
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