My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
HYDRO25219
DRMS
>
Back File Migration
>
Hydrology
>
HYDRO25219
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 8:45:00 PM
Creation date
11/20/2007 5:23:34 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981039
IBM Index Class Name
Hydrology
Doc Date
4/28/1993
Doc Name
ROCKCASTLE CO GRASSY GAP MINE C-81-039 OCTOBER SEDIMENTPOND INSPECTION
From
ACZ INC
To
MLRD
Permit Index Doc Type
SEDIMENT POND INSPECTIONS
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
5
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
<br />appeared to be intact and functioning properly. <br />Vegetation on the embankment nest and inside slope consisted of limited amounts of native gruses and <br />fortis. There were no burrows, gullies, cracks, slides, or seepage observed on the embankment <br />sideslopes. Some erosional downcutting hu occurred in the south inltt cltartnel, however the potential <br />for further erosion appears to be limited by the mtural rocJc armoring which hu developed. <br />It wu observed that the north end of the embankment may be az a lower elevation than thu of the <br />emergenry spillway. Fill material hu been added to this area of the embankment presumably to <br />correct this problem, however it appears that some additional work may be necessary. <br />The sediment level in the pond is approvmately 1.5 feet below the water level or approzitttazely 3 feet <br />below the dewatering orifice. <br />POND 5/6 <br />Pond 5/6 is located northeast of the reclaimed Pit S and adjacent to the Pit 5 main access road The <br />water level in pond 5/6 wu at the invert of the dewazering orifice. The primary spillway wu <br />discharging and wu functioning properly. <br />Vegetation on the embankment wu limited, consisting of naive grasses and taller fortis. <br />The southeast sideslope contains a spring which has eased a minor surEdal slump approzimately 100 <br />feet wide. No recent slump movement wu observed <br />As noted in previous sediment pond inspettior~t, a 3 ft. diamtter sinkhole ezists at the base of the eat <br />embankment, just east of the riser pipe. In June, water wu observed draining into this hole. There <br />wu no evidence of piping at either the outlet culvert or on the embankment ouulope. The drainage <br />wu either reentering the outlet culvert or percolating downgndient beneath the embankment. <br />Remediation measures should be developed and implemented to seal the sink hole to provide for <br />continued stability and effettive functioning of the pond There were no additional gullies, cracks, <br />slides, or seepage observed on the embankment slopes. <br />The sediment level in the pond wu observed to be approumately az the same level u the dewatering <br />orifice. The ao: emulated sediment present is az the designed sediment level for the pond and should <br />be removed <br />
The URL can be used to link to this page
Your browser does not support the video tag.