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ENFORCE22471
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Last modified
8/24/2016 7:32:13 PM
Creation date
11/21/2007 10:11:06 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Enforcement
Doc Date
3/7/1990
Doc Name
OSM MINE SITE EVALUATION INSPECTION REPORT
Violation No.
TD1990020244001TV1
Media Type
D
Archive
No
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'NSPECTION'REPORT <br />nedium for the time being with plans during the upcoming summed <br />~eaeon to topsoil and plant it. As they put in the bench and- <br />resoiled it, they threw up a temporary berm to physically separate <br />the reeoiled area with the waste. In doing so, they did no[ direct <br />the drainage from area inside from the berm to the waste or the 70 <br />foot wide bench drainage area to the mouth of the l00 year diversion <br />~n the southeastern end of the waste pile. This is an oversight on <br />the companys behalf to grade the tail of the berm and hench drainage <br />co the 100 year diversion just below the main topaotl stockpile for <br />the area. <br />The second drainage control problem was noted when Mr. Clapton and <br />myself went back out to the new waste pile bench to measure the slope <br />of the area. I overlooked it earlier in the tnspection when the <br />company official and Mse Regay were nn the site. While she was <br />working on their mineslte report, Mr. Clapton and I decided to po <br />back out to the active workings on the waste pile to survey it for <br />grade. Earlier estimates were limited to visual observation so the <br />decision was made to check the elope of the waste bench with an abney <br />level and clinometer. As we entered the waste bench off of the haul <br />road, runoff was noted crossing the road from the interior bar ditch <br />of the road onto the waste. Further investigation revealed that the <br />ditch in that area was frozen and/or filled with sediment causing it <br />to overflow and run across the road instead of going on down to a <br />culvert underpass into [he 100 year diversion along [he perimeter of <br />the waste pile. I was told by company officials that the tnterior <br />bar ditch of that haul road is the l00 year diversion for the <br />drainage above the road. I[ intercepted drainage from above as veil <br />as road runoff. The portion of the ditch that vas plugged appeared <br />as though it vas not graded properly thus allowing runoff to settle <br />instead of being carried through to the culvert and nn to [he 100 <br />year diversion. It was hard to verify that because of snow cover and <br />the north facing slope which reduced melt to a minimum in that area. <br />Page 2 <br />The Sylvestor Gulch road runoff going into the active waste disposal <br />area was caused by afternoon melt and their failure to grade the road <br />properly. Road maintenance crews grade the road nn a regular basis <br />because it is access for one of the exhaust fans for the mine. Snow <br />is pushed to the side of the road surface but not into the bar ditch. <br />The intent there I assume is not to fill in the ditch. This <br />however, causes snow accumulation on the road which in turn melts and <br />runs down tracks caused from vehicles entering [he area. The bar <br />ditch drainage on both sides of the road is directed into the 100 <br />year diversion around [he lover perimeter of [he pile. There vas some <br />comment about the road being graded with a slight incline towards one <br />or the other ditches but that vas .not apparent during the~,inspection. <br />Old plena for the road that have since been revised called for e <br />eater bar on the road to prevent some of the flow chat was <br />occurring. ~ <br />It was difficult to fully evaluate the amount of drainage directed <br />into the pile that was in violation because of al[ernatLng freeze- <br />thaw cycles encountered on the mine during the inspection. However, <br />
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