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HYDRO31325
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HYDRO31325
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Last modified
8/24/2016 8:55:04 PM
Creation date
11/21/2007 1:32:28 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
Hydrology
Doc Date
4/7/2004
Doc Name
2004 Annaul Impoundment Inspection & 1st Q 2004 Rill & Gully Inspection
From
J.E. Stover & Associates
To
DMG
Permit Index Doc Type
Prof Pond Certifications
Media Type
D
Archive
No
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The estimated water capacity of Pond 6 is less than the original design requirement of <br />1.49 acre feet. However, calculations presented in Volume III, Appendix 13-2, page <br />CDRA-1-1 ii, based on the partially reclaimed and vegetated refuse pile, indicate the <br />required water capacity of Pond 6 is only 0.68 acre-feet. <br />Pond 7 collects run-off from the North Decline. The pond was dry during the <br />inspection. Volume III, Appendix 13-2, page NDEC-1 shows that its design water and <br />sediment capacities are 0.23 A-F and 0.03 A-F respectively. It is a dugout pond which <br />must be dewatered with a pump. There is little if any sediment build up in the pond. <br />Therefore, the pond's capacity is obtained from the most recent pond certification <br />performed by Larry M. Reschke, P.E., on June 1, 1995. <br /> Water Sediment Total <br />Pond 7 - A-F 0.34 N/A 0.34 <br />Pond 8 collects run-off from the South Portal and the RSRDA. The pond was dry <br />during the inspection. Volume III, Appendix 13-2, page RSS-1 shows that its design <br />water and sediment capacities are 1.79 A-F and 0.83 A-F respectively. It is a dugout <br />pond which must be dewatered with a pump. There is no sediment buildup in the pond. <br />Therefore, the pond's capacity is obtained from the most recent (2002) aerial survey. <br /> Water Sediment Total <br />Pond 8 - A-F 3.96 N/A 3.96 <br />Pond 9 coNects run-off from the South Portal and RSRDA. The pond was dry during <br />the inspection. Volume III, Appendix 13-2, page RSS-15 & 15i shows that its design <br />water and sediment capacities are 0.33 A-F and 0.33 A-F respectively. The sediment <br />was removed from the pond during 2003 so the pond had a total depth of 9-feet. One <br />foot of sediment has accumulated in the pond since it was cleaned. The percent of <br />sediment buildup is 23% (1' deep divided by 4.3' maximum depth). Based on this <br />sediment buildup and 2003 survey of the pond after sediment was removed, the pond <br />has the following estimated capacity: <br /> Water Sediment Total <br />Pond 9 - A-F 0.66 0.24 0.90 <br />Pond 10 collects run-off from CRDA-2. The pond was dry during the inspection. <br />Volume III, Appendix 13-2, page CRDA2-1 shows its design water and sediment <br />capacities are 1.37 A-F and 1,23 A-F respectively. There are approximately 3-feet of <br />sediment buildup in the pond. This figure is derived from the average length of the two <br />-2- <br />
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