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C-1981-022
<br />RN-05 Findings
<br />February 2009
<br />• TR-61, approved September 23, 2008, added one Mine Vent Borehole, pad and associated light
<br />use road.
<br />Eighteen Minor Revisions (MRs)
<br />• MR-70, approved November 3, 2003, allowed OMLLC to conduct testing of emissions from
<br />previously installed Sanborn Mine Methane De-gas Wells.
<br />• MR-71, approved December 3, 2003, provided for the construction of two topsoil stockpile areas
<br />during construction of the II West Coal Refuse Facility roads and sediment pond.
<br />• MR-72, approved June 2, 2004, updated Air Emissions and Water Discharge permits.
<br />• MR-73, approved July 12, 2004, provided for the drilling of two coal exploration holes at the
<br />location of the reclaimed Blue Ribbon Mine.
<br />• MR-74, approved July 13, 2004, expanded the facilities for the Somerset Water District.
<br />• MR-75, approved March 11, 2005, provided for surface preparation at the Hubbard Creek
<br />Fansite.
<br />• MR-76, approved March 21, 2006, added as-built information for the mine water transfer
<br />borehole at the Hubbard Creek Fansite and an amended CDPS Permit for abatement of NOV#
<br />CV-2006-001.
<br />• MR-77, approved March 27, 2006, updated the Weed Control Plan.
<br />• MR-78, approved June 9. 2006, incorporated various modifications to mine facilities.
<br />• MR-79, approved June 9, 2006, addressed Mid-Term Review items, including the addition of a
<br />Biological Block Clearance and Cultural Resources Inventory.
<br />• MR-80, approved June 9, 2006, provided expedited approval for two of the TR-54 Methane Vent
<br />Boreholes due to elevated methane levels in the mine.
<br />• MR-81, approved July 20, 2006, expanded the size of the Warehouse Facility.
<br />• MR-82, approved July 20, 2006, extended a light use road east of the Hubbard Creek drainage.
<br />• MR-83, approved September 20, 2006, incorporated seed mixes required by the BLM and USFS.
<br />• MR-84, approved September 7, 2007, provided for the relocation of a previously approved
<br />Methane Vent Borehole.
<br />• MR-85, approved October 29, 2007, provided for the installation of a methane exhauster pump
<br />apparatus at the Hubbard Creek Fansite and replacement of the BC-1 alluvial well which had
<br />been damaged.
<br />• MR-86, approved May 2, 2008, provided for the relocation of a previously approved Methane
<br />Vent Borehole.
<br />• MR-87, approved November 13, 2008, added a utility borehole to the Methane Vent Borehole
<br />pad permitted under TR-61.
<br />As the mine has been in operation since 1902, much of the disturbed area associated with the mine
<br />was affected prior to the effective date of the Surface Mining Control and Reclamation Act of 1977
<br />and the Colorado Surface Coal Mining Reclamation Act. Baseline environmental factors were not
<br />measured, and no topsoil was salvaged prior to previous disturbance. Disturbances which have been
<br />conducted since the effective date of the Act have been permitted and conducted in compliance with
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