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INSPEC12857
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INSPEC12857
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Last modified
8/24/2016 9:14:33 PM
Creation date
11/18/2007 8:57:50 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977493
IBM Index Class Name
Inspection
Doc Date
9/21/1998
Doc Name
Insp Rpt
From
DMG
To
Climax Molybdenum Company
Inspection Date
9/17/1998
Media Type
D
Archive
No
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:~ <br />• (Page 2) <br />MINE ID # OR PROSPECTING ID # M-77-493 <br />INSPECTION DATE 9(17(98 INSPECTOR'S INITIALS ACS <br />OBSERVATIONS <br />On August 26, 1998, the Division of Minerals and Geology issued a conditional <br />approval of revision SR-002 to the Climax Mine reclamation permit. Conditional <br />approval of revision SR-002 was based on the Division's finding that the approved <br />post-mining land use of developed water resources had been accomplished for Eagle <br />Park Reservoir. Condition no. 3 to the approval of SR-002 states: <br />Approval of SR-002 require(s) the removal of inert debris from below the high <br />water mark of the reservoir and diversion of water from the steep slopes on the <br />reservoir's southern shore... <br />These requirements are further discussed in the Division's 7/2/98 inspection report <br />filed for the Climax Mine. The primary purpose of this inspection was to determine <br />if the reclamation work required under condition no. 3 to SR-002 had been completed. <br />The road immediately above the steep slopes on the reservoirs south shore was <br />inspected. This road is located topographically below the county road that parallels <br />the Chalk Mountain Intercept, and for the purpose of this report will be called the <br />South Shore Road. The Operator has constructed a continuous berm along the north <br />edge of the South Shore Road (between the road and the reservoir) and has graded the <br />road to tilt to a ditch running along the road's south edge. These measures will <br />effectively prevent water from spilling down the steep slope to the reservoir. At <br />a certain point water in the South Shore Roadside ditch disappears into the ground. <br />During the Division's 7/2/98 inspection, it was discussed that this water may <br />subsequently daylight on the steep slope down to the reservoir, potentially <br />destabilizing the soil mantle. However, no springs were observed on the steep slope <br />to indicate where the ditch water may be surfacing. To address this potential <br />stability issue, the Operator spread granular bentonite in an effort to seal the area <br />were the ditch water flows into the ground. The effectiveness of this bentonite seal <br />should be monitored, and if the water continues to flow into the ground, some more <br />aggressive sealing efforts for the roadside ditch may be necessary. It was discussed <br />that the South Shore Road has no long-term utility, and will eventually be reclaimed. <br />The Operator has scheduled a group of CSU students to plant 4" tublings of Colorado <br />Currant and plugs of Western Wheatgrass on the steep south slope of the reservoir. <br />This is an effort to further stabilize the mantle of soil on this slope. The <br />plantings are scheduled to occur during the weekend of 9/19/98. <br />The monuments installed to monitor the shear surface identified on the south shore <br />of the reservoir were surveyed on 7/22/98, and the survey results have been provided <br />to the Division. These data show no movements in excess of .047 feet from the <br />6/22/97 survey. In order to follow the guidance for slope monitoring approved in <br />revision SR-002, the monuments should be surveyed one more time in 1998 during <br />October, and twice in 1999 in June and October. <br />The area at the east-end of the Eagle Park Reservoir was inspected. The debris that <br />had been observed here during the Division's 7/2/98 inspection had been removed. <br />There is a road that drops down from the South Shore Road to the stream inlet at <br />the reservoir's east-end. This road then continues around to the reservoir's north <br />
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