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INSPEC23304
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Last modified
8/24/2016 9:23:14 PM
Creation date
11/18/2007 9:49:18 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981025
IBM Index Class Name
Inspection
Doc Date
9/24/1999
Doc Name
OSM MINE SITE EVALUATION STATE PROGRAM
Inspection Date
9/16/1999
Media Type
D
Archive
No
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September 17, 1999 <br />Minrec, Inc. <br />C/O Jim Stover & Associates <br />2768 Compass Drive, Suite 101 <br />Grand Junction, CO 81506 <br />North Thompson Creek Mine <br />Complete, oversight inspection <br />September 15 & 16, 1999 <br />Participants: <br />Jim Stover, Minrec, Inc. <br />Dan Hernandez, Colorado Division of Minerals and Geology (DMG) <br />Byron Walker, DMG <br />Henry Austin, Office of Surface Mining (OSM) <br />I participated in a complete, oversight inspection of the North Thompson Creek Mine as <br />indicated above. This site was selected for inspection by the joint DMG/OSM oversight team and <br />the primary focus of this inspection was on reclamation success. Weather conditions included <br />variable cloudiness with light rain on Sept. 15'" ,and clear and mild on Sept. 16's. Ground <br />conditions were dry throughout the minesite with the exception of one section of the light use <br />road to the former fan portal. <br />We began the inspection on the afternoon of Sept. 15'" by walking the light use road to the former <br />fan portal. The bridge over N. Thompson Ck. is in need of repair to make it functional. The <br />roadway to the fan portal was stable in all areas, one section was wet as indicated above. The <br />small cut slopes for the road are well stabilized by vegetation and no problems with the roadway <br />were noted. The reclaimed fan portal is also stable and no problems were noted there. The <br />disturbed area boundary is clearly mazked. We next inspected the proposed fan reclaimed area, <br />and Canadian thistle needs to be managed here (Mr. Walker noted several areas where Canadian <br />thistle management was necessary). We next inspected the Mine No. 3 reclaimed portal entrance <br />area and associated roadway to the former fan portal. The reclaimed roadway is an excellent <br />example of returning disturbance areas to their approximate original contour. All areas inspected, <br />including the former fan portal, were stable and the revegeta[ion mix was dominated by cicer <br />milk vetch and crested wheatgrass. There is an active ground water monitoring well on the <br />reclaimed Mine No. 3 area also. This well is used to monitor water levels in the sealed mine. <br />Appazently during approximately the second calender quarter of 1995, water began discharging <br />out of the former Mine No. 3 portal (through designed discharge pipe outlets) and on or about <br />August 11, 1995, the permittee combined the Mine No. 3 discharge with the Mine No.l <br />discharge into the long pond (separate piped discharges). We next inspected the former water <br />tank site, it also is stable, dominated by the same revegetation mix with perhaps more wheatgrass <br />cover, and also contains an active groundwater monitoring well. This concluded the inspection <br />on Sept. I S'". <br />
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