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Extraction of coal from the East Pit was terminated in 2006. All reclamation activities have been <br /> completed in the East Pit and is in the required final revegetation stages. <br /> The West Pit is located to the west of the East Pit. The method of operation utilized in, and the <br /> coal seams extracted from, the West Pit were the same as those of the East Pit. The West Pit was <br /> roughly the same overall size as the East Pit. Mining in the West Pit advanced from the north to <br /> south, paralleling the movement of the adjacent East Pit. Mining operations in the West Pit were <br /> completed in 2015. Currently reclamation activities remaining in the West Pit include <br /> backfilling, grading, reduction of the highwall, and revegetation. <br /> Colowyo is continuing to perform reclamation maintenance and activities in the East Pit and <br /> West Pit. Reclamation in the East Pit and West Pit is expected to conclude in 2029. <br /> Operations in the South Taylor Pit began after the approval of PR-02 in 2007. This pit is located <br /> north and west of the northward flowing Good Spring Creek and southwest of the West Pit. It <br /> lies partially in Rio Blanco County. In the South Taylor Pit, 17 seam and sub-seam complexes <br /> are mined. The seams are the A, B, C, D, E, F and G seams and their seam complexes (for <br /> example, the G-Seam is separated into G7, G8 and G9 in the South Taylor Area). At the peak of <br /> operations, the South Taylor Pit will be nearly 4,000 feet wide, 6,000 feet long, and 550 feet <br /> deep. Pit progression is from east to west. Projected life of the South Taylor Pit is estimated to <br /> be until 2021 as per the currently approved Map 23A of the PAP, not including potential <br /> highwall mining, which could prolong this schedule. Reclamation in the South Taylor Pit is <br /> expected to conclude in 2029. <br /> In 2017, construction began for the Collom Pit expansion approved with PR-04. Current <br /> activities are limited to all activities outlined in Exhibit 13C—Collom Cumulative Bond <br /> Schedule of the PAP. <br /> Permit, Performance Bond, and Bond Release History <br /> The permanent program mining permit was issued on November 4, 1982. Seven successive <br /> permit renewals have been approved subsequent to the initial permanent program permit <br /> approval; the most recent, Permit Renewal No. 7, was issued August 14, 2018, for a permit term <br /> that will expire November 5, 2022. The Division currently holds a reclamation bond, in the form <br /> of a self-bond, in the amount of$108,025,721.00. <br /> Proposed Decision and Findings of Compliance October 22,2019 <br /> Partial Phase I,II and III Bond Release SL-16 Page 3 <br />