2017-03-10_REVISION - C1981019 ‎(9)‎

• Permit No: C1981019
• IBM Index Class Name: Revision
• Doc Date: 3/10/2017
• Doc Name: Application
• From: Tri-State Generation and Transmission Association, Inc
• To: DRMS
• Type & Sequence: SL12
• Email Name: ZTT
• Email Name: JRS
• Media Type: D
• Archive: No

Table of Contents
1.0 INTRODUCTION.........................................................................................................................1
2.0 METHODOLOGY FOR VEGETATION SAMPLING / COMPARISON METHODS.....................................6
2.1 Sample Site Selection / Location...........................................................................................6
2.2 Determination of Ground Cover.............................................................................................6
2.3 Sample Adequacy Determination...........................................................................................8
3.0 RESULTS....................................................................................................................................9
3.1 Phase II Summary ...................................................................................................................9
3.2 Reference Areas......................................................................................................................9
3.2.1 Mountain Shrub Reference Area.........................................................................................9
3.2.2 Sagebrush Reference Area.................................................................................................9
3.3 Sedimentology Evaluation......................................................................................................16
4.0 SUCCESS COMPARISON............................................................................................................19
5.0 LITERATURE CITED..................................................................................................................20
In -Text Maps, Figures, Tables, and Charts
ReclamationUnits Table................................................................................................................1
Map 1- Colowyo Mine - Overview................................................................................................. 2
Map 2 - Colowyo Mine - Phase II Bond Release Block Sample Sites................................................3
Map 3 - Colowyo Mine - Mountain Shrub Reference Area Sample Sites............................................4
Map 4 - Colowyo Mine - Sagebrush Reference Area Sample Sites ................................................... 5
Figure 1- Sampling Procedure at a Systematic Sample Site Location...............................................7
Table SA - Sample Adequacy Results.............................................................................................8
Table 1- Average Ground Cover by Lifeform - 2014.....................................................................11
Table 2 - Relative Ground Cover (Composition) by Lifeform - 2013 ................................................13
Chart 1- Average Ground Cover by Lifeform - 2014.....................................................................15
Chart 2 - Relative Ground Cover (Composition) by Lifeform - 2014 ................................................15
Table - K Factor for Section 16 Phase II Bond Release..................................................................17
Table - Post -Mining K Factor Inputs.............................................................................................17
Table - LS Factor for Section 16 Phase II Bond Release.................................................................17
Table - C Factor for Section 16 Phase II Bond Release..................................................................17
Table - A (soil loss in tons/acre/year) for Section 16 Phase II Bond Release...................................18
Chart 3 - Perennial Cover Success Comparison - 2014..................................................................19
Chart 4 - Averaged Sedimentology Success Comparison - 2014 .....................................................19
Appendix A - Raw Data Tables
Table A1- Vegetation Cover - Species List - 2013
Table A2 - Vegetation Cover - Phase II Bond Release Block - 2014
Table A3 - Vegetation Cover - Mountain Shrub Reference Area - 2014
Table A4 - Vegetation Cover - Sagebrush Reference Area - 2014