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2010-04-05_HYDROLOGY - C1981041 (6)
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2010-04-05_HYDROLOGY - C1981041 (6)
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Last modified
8/24/2016 4:03:17 PM
Creation date
4/6/2010 10:11:31 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
HYDROLOGY
Doc Date
4/5/2010
Doc Name
2010 Annual Impoundment Inspection
From
J.E. Stover & Associates, Inc
To
DRMS
Permit Index Doc Type
Prof Pond Certifications
Email Name
MPB
SB1
Media Type
D
Archive
No
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The north decline east and west non-discharging sumps are designed to contain <br />the 25-year 24 hour storm event without discharge. The sumps were damp during the <br />inspection. The sumps were certified by Larry M. Reschke, P.E. on December 21, <br />1992. Based on visual observations during the inspection and a hand level survey of <br />the depth of the sumps, the sumps have excess capacity plus the following design <br />capacity: <br /> Water Sediment Total <br />East Sump - A-F 0.08 N/A 0.08 <br />West Sump - A-F 0.32 N/A 0.32 <br />The sewage lagoons located at the unit train loadout consist of an aeration lagoon and <br />a series of three non-discharging lagoons. During the inspection, the aeration lagoon <br />and the first non-discharging lagoons were damp. Some grading work had been done <br />on the aeration lagoon and the first non-discharging lagoon in preparation for <br />reclamation. The second and third non-discharging lagoons had shallow pools of water <br />at approximate elevation of 4758. The capacity of the lagoons is not considered <br />important and is therefore not presented. The lagoons are inactive. The embankment <br />on all of the lagoons needs to be graded to smooth out erosional features. The sewage <br />lagoons are to be reclaimed during 2010 so this maintenance work will not be <br />performed. <br />To the best of my knowledge and belief, the impoundments with the exception of the <br />sewage lagoons, have been maintai e s0designed and in accordance with the <br />approved plan and applicable re ,,ioh§G/`? <br />0, - 013300 <br />© a <br />a?oQ J -tea <br />James E. Stover a Date <br />Colorad®??fessional sneer <br />RegistrKq-NQ.a'? -e® <br />/,OIVAL too, <br />-4-
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