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RULE 2 PERMITS <br />In order to verify the predicted effects of mining activities on groundwater and surface water, Stipulation <br />#1 of the initial Permit required Colowyo to submit a comprehensive water monitoring plan. For further <br />details regarding this plan, refer to Section 4.05.13, Surface and Groundwater Monitoring. Refer to the <br />1983 - 1989 Annual Reclamation Reports for further details as to the data collected. <br />2.06.9 Angering and Highwall Mining <br />In the South Taylor Pit, highwall mining has successfully occurred on the E seam in the northwestern area <br />of the West Taylor Fill and the northeastern extent of the box cut. Please see Map 23A for these <br />locations. Currently, Colowyo is proposing to highwall mine the G7/G8, E, and D2 seams on the low <br />wall and end wall of the South Taylor Pit (see Map 23A). The planned highwall mining sequencing will <br />begin with the G7/G8 seam, and once mining is completed the pit will be backfilled to the E seam. <br />Colowyo plans to highwall mine the E seam then backfill to up to the next seam and highwall mine it <br />accordingly. This sequencing of highwall mining and backfill will adequately mine the full extent of the <br />reserve over time. One additional area has been proposed to be highwall mined on the western perimeter <br />of the South Taylor Pit (see Map 23A); however, at this time additional engineering studies and <br />exploratory drilling evaluations may be needed to fully define the mineable reserve in this area. <br />Please see Volume 1, Rule 2.06-8 for previously and proposed highwall mining locations in the East and <br />West Pits. <br />2.06.10-2.06.11 Processing Plants, In -Situ Processing <br />See original permit for these three sections <br />2.06.12.1 Coal Refuse Piles <br />Coal refuse piles do not exist on the Colowyo property. Thus, this section is not applicable. <br />2.07-2.10 VARIOUS <br />Information required by these sections is included in Volume 1, in other sections of this application, in the <br />cover letter or is not applicable to the South Taylor mining area. Colowyo understands the permitting <br />process employed by the Division and will facilitate that process as requested. <br />South Taylor/Lower Wilson — Rule 2, Page 91 Revision Date: 4/7/17 <br />Revision No.: RN -07 <br />