2010-06-01_REVISION - C1981019 ‎(5)‎

• Permit No: C1981019
• IBM Index Class Name: REVISION
• Doc Date: 6/1/2010
• Doc Name: Exhibit 5 2006, 2007, 2008 & 2009 Phase II Vegetation Reports
• From: Colowyo Coal Company
• To: DRMS
• Type & Sequence: SL4
• Email Name: JRS
• Email Name: SB1
• Media Type: D
• Archive: No

Table of Contents
1.0 Introduction ............................................................................................ ............................... 1
2.0 Methodology for Vegetation Sampling / Comparison Methods ............ ............................... 7
2.1 Sample Site Selection / Location ............................................................ ............................... 7
2.2 Determination of Ground Cover ............................................................. ............................... 8
2.3 Sample Adequacy Determination ......................................................... ............................... 10
2.4 Success Evaluation ............................................................................. ............................... 10
3.0 Results ................................................................................................... ............................... 12
3.1 Phase II ............................................................................................ ............................... 12
3.2 Reference Areas ................................................................................. ............................... 12
3.2.1 Mountain Shrub Reference Area ........................................................ ............................... 12
3.2.2 Sagebrush Reference Area ............................................................... ............................... 13
4.0 Conclusions ........................................................................................... ............................... 19
5.0 Literature Cited ..................................................................................... ............................... 20
In -Text Tables, Charts, Figures, and Maps
Map 1 — Vegetation Sampling Point Locations — Phase II Bond Release Area — 2007 ........................ 3
Map 2 — Vegetation Sampling Point Locations — Mountain Shrub Reference Area — 2007 .................. 4
Map 3 — Vegetation Sampling Point Locations — Sagebrush Reference Area — 2007 .......................... 5
Table P — Precipitation at the Colowyo Mine, 2001 - 2007 ............................... ............................... 6
Chart P — Precipitation by Growing Season at the Colowyo Mine, 2001 - 2007 .. ............................... 6
Figure1 ..................................................................................................... ............................... 9
Chart 1 — All Sampled Areas — Average Ground Cover by Lifeform - 2007 ..... ............................... 14
Chart 2 — All Sampled Areas — Relative Ground Cover (Composition) by Lifeform - 2007 ............... 14
Table 1 — All Sampled Areas — Average Ground Cover by Lifeform - 2007 ...... ............................... 15
Table 2 All Sampled Areas — Relative Ground Cover (Composition) by Lifeform - 2007 ................ 17
It