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ENFORCE33233
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ENFORCE33233
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Entry Properties
Last modified
8/24/2016 7:43:49 PM
Creation date
11/21/2007 1:41:05 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Enforcement
Doc Date
2/8/2006
Doc Name
Submittal of Written Information and Request for Vacation
From
Oxbow Mining LLC
To
DMG
Violation No.
CV2006001
Media Type
D
Archive
No
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TR-52 included such changes as Permit text, revised culvert designs, revised ditch designs, <br />replacement of a clean water plunge pool with a cleanwater ditch downdrain, revised orientation <br />of the concrete pad and fan structure, revised disturbance and topsoil calculations, revised post <br />mine topography and cross-sections, revised reclamation material mass balance, revised <br />Sediment Pond F design, revised Mine Disturbance Area Table, etc. <br />Clearly, TR-52 was the most efficient and effective mechanism to incorporate the final Hubbard <br />Fansite as-built configuration into the PAP. While TR-52 wvered a variety of issues related to <br />the facility, no change in reclamation liability was determined to be applicable. Had an increase <br />in reclamation liability been determined, Oxbow has bond contingency to cover the difference. <br />TR-51 -Hubbard Fansite Boreholes <br />The mechanism for permitting of the boreholes at the Hubbard Fansite was TR-51. Completion <br />of the boreholes did not include additional surface disturbance beyond that already existing for <br />the Fansite facility. While the TR-51 application also requested DMG consideration of additional <br />reclamation liability, the Division's final TR approval did not. <br />The application text and Drawing 2.05-El-HFS "Facility Designs Hubbard Creek Fansite" <br />acknowledged the potential for more than one attempt to complete the B seam borehole. In fact, <br />the B seam borehole took three attempts. The first two attempted boreholes failed to reach B <br />seam mining voids and will be sealed with concrete as soon as a concrete tnrck can safely reach <br />the site. The third B seam attempt was successful and the B seam mining void was encountered <br />at 336'. <br />The D seam water hole (only 53 feet deep) was readily completed. Due to the potential need for <br />another utility borehole for possible methane drainage, electrical, au or water, Oxbow had the <br />drill rig simply move over and complete a second D seam borehole while on site using the <br />existing mud pit. See Photograph #2 for a view of the final borehole locations. <br />In summary, while three potential drilled boreholes were predicted in TR-51, a total of five <br />boreholes were eventually drilled, with three boreholes to be used and two boreholes to be filled <br />with concrete. <br />Similar to the experience with the overall Fansite construction, we anticipated that once the <br />boreholes were completed, we would later provide a permit revision to efficiently include the as- <br />built information into the PAP. The as-built information would include accurate completed <br />borehole locations, completion diagrams, revised maps etc. <br />During the January 18, 2006 CDMG inspection, the Hubbard Fansite was inspected. After <br />describing the configuration of the completed boreholes and status of unsuccessful boreholes, I <br />noted that the information for the as-built borehole configuration permit revision was being <br />prepared as we spoke. As soon as the borehole completion diagrams and maps were completed, <br />the revision would be promptly submitted. I noted that the submittal of the as-built information <br />was an exercise similar to that accomplished by submittal of TR- 52 for the overall Hubbard <br />Fansite facility. Oxbow had made no attempt to hide our intentions or shirk our responsibility to <br />• Page 2 <br />
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