2011-06-15_GENERAL DOCUMENTS - C1981025

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No record was found where a third portal, located between US Forest Service Road 306 and Middle Thompson Creek, was used during permanent permit time periods. An air shaft, the Stoney Ridge air shaft, was located in the Middle Thompson Creek drainage to the south of Portal 1. Coal processing and other major surface facilities were located to the northeast of Portal 1 between North Thompson Creek and County Road 108. Coal was hauled by truck via County Road 108 and a spur road to a loadout facility. The spur road and loadout facility, which have been released from the permit, were located on private lands within Garfield County, Colorado, northwest of Carbondale. Coal was dumped from trucks on the west side of the Roaring Fork River and conveyed by a conveyor belt across the Roaring Fork River to a rail loadout facility on the east side of the river. The former permit area east of the center of the Roaring Fork River (the 29-acre Diamond A parcel) was released from bonding requirements and the permit in 1994 (sl- 03), and is not included in the current permit. Following the approval of Bond Release SL-06, the permit area is 1,086.00 acres. This includes 20.00 acres of federal and 1,066.00 acres of private lands, all of which are at the mine site (the 36 at the loadout was released with the approval of Bond Release SL-05). Of these, 67 have been disturbed by surface activities. By 1988 demolition of structures and grading and seeding of disturbed areas had been completed, and a Phase I bond release was approved (SL-01). However, mine water seeps had developed at Portal 1. A 2.2-acre area was re-disturbed to accommodate a mine water discharge collection system and treatment facility in 1988. In 1995, mine water discharges from Portal 3 were diverted to the treatment facility, resulting in a total of 2.6 acres re-disturbed for the mine water portals discharges collection and treatment system. A 100% bond release (reduction) was approved in 1993 for a section (approximately 2 acres) of permanent road located in the loadout site (SL-04). On 22 December 2009 the Division approved a Partial Phase I/11/11I Bond Release, SL-06, at the North Thompson Creek Mine. This release granted a full Phase III release on all areas that did not overly the workings, reducing the current permit boundary to 1,086.00 acres. This release also included all of the remaining surface areas with the exception of the 4.10 acres that comprise the passive treatment system for the Portal #1 and Portal #3 mine water discharge. This passive treatment system has been permitted as a permanent feature (a developed water resource) and will not be reclaimed. Based on the approval of Bond Release SL-06, there is no remaining reclamation work required at the North Thompson Creek mine. There have been no Notices of Violation issued against the North Thompson Creek Mine permit since the last Permit Renewal (RN-05) in May 2009. The last Notice of Violation issued at the mine was in June 2007. II - REVISIONS TO THE PERMIT The following is a summary of the revisions to the permit since the approval of Permit Renewal 05 on 12 May 2009. Technical Revision 24 was received on 18 March 2010, deemed complete on 29 March 2010 and approved on 19 April 2010. TR-24 incorporated a new CDPS permit (no. CO-048233) into the mine permit. North Thompson Creek Mines C-1981-025 2011 Midterm Review (MT-06) -3- 15 June 2011