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GENERAL31572
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Last modified
8/24/2016 7:54:38 PM
Creation date
11/23/2007 7:02:48 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981017
IBM Index Class Name
General Documents
Doc Date
1/28/2002
Doc Name
Annual Report Coal Basin Sediment Pond Reclamation Projects Stormwater Permit
From
Stormwater Permit Ponds Folder
Permit Index Doc Type
Reclamation Project
Media Type
D
Archive
No
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Pond Outfall <br />Number Noes <br />001 Old Refuse Pile, East <br /> U er <br /> Middle <br /> Lower <br />006 Old Refuse Pile, To <br />008 Bus Gaza e <br /> East <br /> West <br /> North <br />O10 Wazehouse <br /> U er <br /> Lower <br />013 Mine 4 <br />Pond Outfall <br />Number Notes <br />017 Mine 5 <br />018 Mine 1 <br /> U er <br /> Lower <br />021 Sute Refuse Pile <br /> U er <br /> Lower <br />022 Mine 2 <br /> U er <br /> Lower <br />023 Mine 3 Bin Pad <br />024 Slu Pond <br />025 Rock Tunnel Pad <br />Reclamation construction at each of the ponds was accomplished in the same manner. <br />Construction began by excavating the corrugated metal pipe (CMP) dewatering device located <br />within each pond. During removal of the CMP, the side slopes of each cut were reduced to 2.5 H <br />1 V, and the excavation base was widened to five feet minimum width. Following completion <br />of excavation, two courses of rip rap were placed within the cut. The first was mechanically <br />pushed into the base of the excavation, and into the lower portion of the side cuts. The second <br />course was placed over the first. The cut slopes were then severely roughened to minimize <br />erosion potential and to promote successful revegetation. A wetlands seed mixture was <br />distributed around the perimeter of each pond from the water level to an elevation ten feet above <br />the water level. An upland, high altitude reclamation seed mixture was distributed on any <br />disturbed azeas above the ten foot elevation. Approximately sixty willow cuttings were planted <br />at the perimeter of each pond. <br />The Best Management Practices employed included severe surface roughening of excavated pond <br />embankments in order to disrupt surface flows and to minimize erosion potential. Construction <br />was accomplished when water levels were low so as to not impact water quality with sediment. <br />Silt fences were erected below excavation azeas in order to retain sediment prior to it entering <br />adjacent water resources. All disturbed areas were revegetated with appropriate wetlands and <br />uplands area seed mixtures in order to promote long term stability of the sites. <br />Inspections conducted in 2001 indicate that the Best Management Practices employed during <br />construction were functioning as designed. The rock rip rap placed in the bottom of the <br />excavated spillways was sufficient in size and volume to deter erosion. No erosion of the <br />embankment cut slopes was observed. The severe scarification and the minimal height of these <br />areas were sufficient to minimize erosion potential. The silt fence erected at the base of each cut <br />slope was tightened and stabilized as needed. No erosion or sediment generation problems were <br />noted at any of the discrete pond locations. It is assumed that the vegetative cover will become <br />sufficiently established in 2002 so as to watrant a request for permit termination in 2002 or 2003. <br />
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