2009-11-02_REVISION - C1991078 (2)

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Table 2 Hamilton - Vegetation Cover - 2009 Average Plant Cover Summary Percent Ground Cover Based on Point-intercept Sampling Adjacent Sagebrush Grassland Sagebrush Grassland Hamilton Reference Ref. Area - Ref. Area - Ref. Area - Ref. Area - Area--> Reveg Area South South North North Grasses and Grass-likes NW P Aristida purpurea Purple Threeawn - - - - 0.40 - Nw P Bouteloua gracilis Blue Grama 4.70 2.50 1.60 6.80 9.80 0.60 I A Bromus tectorum Cheatgrass 4.15 0.90 --- - - -------------- 0.60 - --------------------- 1.60 - Nw P Hiiaria jamesii James' Galleta - - - -- 0.35 ------------------ 1.60 - 0.40 1.80 1.00 N P Oryzopsis hymenoides Indian Ricegrass 2.05 1.50 0.40 - - - N P Sitanion hystrix Bottlebrush Squirreltail 1.50 -------...---------- 0.80 -------------------- 0.40 --------------------- - ----------- 1.40 ----------------- - - - - ---------.- _. ----------------------------------- -------------------- - -_1 ----------- ---------- Nw P Sporobolus airoides Alkali sacaton 1.15 0.70 - - - - N P Stipa comata Needle and Thread 7.25 2.20 1.80 14.80 3.20 14.20 Forbs I P Astragalus cicer Chickpea Milkvetch 0.45 - - - - - N P Eriogonum sp. Buckwheat - - - 0.20 - - I A Erodium cicutarium Redstem Stork'sbill 2.85 0.40 - - -------------------- - --------------------- 0.20 --------------------- - ------------------ ------------------------------------------------------------------------------------------------------------ N P Happlopappus sp. Happlopappus sp. ------------------- - ----------- -------- - - - - 0.20 N A Lappula redowskii Flatspine Stickseed 0.05 - - - - - N P Phloxlongifbia Longleaf Phlox 0.10 - 0.20 -------------------- 0:60 - - I A Salsola kali Russian Thistle 1.30 - - - - I A/B Sisymbrium altissimum Tall Tumblemustard 0.10 - - - - - N P Sphaeralcea coccinea Scarlet Globemallow 3.20 - 1.40 - 0.60 Shrubs, Cacti & Trees N P Artemisia tridentata var wyo. Wyo. Big Sagebrush 1.60 8.20 15.60 - 2.20 0.80 N P A triplex canescens Fourwing saltbush 5.30 0.10 - - - - N P Atriplexgardneri Saltbush ---------- ----- 0.05 - - - - - - - - N P Krascheninnikovia Janata Winterfat 2.45 - - - - - N P Gutierrezia sarothrae Broom Snakeweed - - 0.60 - 0.60 - N P Opuntia polyacantha Prickly-Pear - 0.40 - 0.20 0.20 - Total Plant Cover 38.60 19.50 20.40 25.00 19.80 19.00 Rock 2.15 1.60 0.20 2.00 7.60 3.80 Litter 22.05 27.70 31.40 30.20 34.40 22.60 Bare ground 37.20 51.20 48.00 42.80 38.20 54.60 Total Perennial Cover 30.15 18.20 20.40 24.40 19.60 17.20 CEDAR CREEK ASSOCIATES, Inc. Page 13 Hamilton Mine - Revegetation Evaluation - 2009