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Baseline environmental quality data including vegetation, soils, surface water, and ground water was collected, evaluated, and summarized in this document. In addition, cultural and historical features, surface ownership, coal ownership, wildlife, and land use was evaluated and summarized in the permit revision application. Permits for lscharge of surface water from the South Taylor mining area, air quality emissions, blasting activities, wetlands disturbance and reclamation, installation and maintenance of groundwater monitoring wells, and weights and measures will be obtained prior to beginning mining activities as part of this application. This permit revision document is intended to only present information relevant to the expansion area and does not include information regarding the existing mining area. Sections of the existing permit that present general information that is applicable to the existing operation were not changed and therefore are not included in this document. Please refer to the existing permit document for general information not presented in this document. Colowyo has been mining for over 27 years and current evidence documents that Colowyo's mining and reclamation plan, including the associated design criteria are functioning in compliance with the rules of the Colorado Division of Minerals and Geology -Mined Land Reclamation Division (the Division). The extension of the mining and reclamation plan into adjacent areas are anticipated to meet with a similar high degree of success. The Division has been provided significant information regarding Colowyo's current operation through the initial and subsequent permit applications, permit renewals, and site visits. In addition, the Division has been presented information regarding the proposed permit boundary expansion area during on-site presentations, meetings, and correspondence. Additional information is presented in the following permit revision application. There are several items which are part of this application but will be provided under separate cover. We would anticipate that these will be provided within about 2 weeks. Specifically, these items include: • Exhibit 7, Item 14 • • Exhibit 7, Item 14 • Exhibit 7, Item 14 • Exhibit 7, Item 20 • Exhibit 21, Item 1 Introductory text describing Sediment Pond Hydrologic Design SEDCAD design information for the temporary side collector ditches and the permanent ditches associated with the South Taylor Mine Plan Update to summary spreadsheet showing pond design information. SEDCAD model runs for the 4 new ponds Geotechnical Report -South Taylor Excess Fills There are also three maps which will not be submitted at this time. As we have discussed with you, these are all bond related maps which can be submitted following your initial review of the proposed postmining topography. While these have not been started, we would anticipate they could be completed in about 2 weeks. Specifically, these maps are: • Map 35A -Bond Calculation Map Worst Case Topography -South Taylor • Map 36A -Bond Calculation Map Regraded Topography -South Taylor • Map 40A -Bond Calculation Cross Sections -South Taylor Please contact me at (970) 824-1579 with any questions that may develop during your review of the attached permit revision application. Sincerely, f''f Tafid -~~ ay A. zzl ~i Senior Environmental Engineer Colowyo Coal Company .Attachment: CDMG Application Form for a Revision to a Coal Mining and Reclamation Permit Cc: Central Files Colowyo Mine • 5731 State Highway l3 • Meeker, Colorado SIG41 T +1 970 824 1500 • F +I 970 824 1504 • www_rtearom