2010-03-12_REPORT - C1981019 (8)

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Compendium 3 - EP043 REVEGETATION DATA Ground Cover pia Growing Seasons --> 2 4 7 9 10 . ?, Year Sampled --> 2004 2006 2009 2011 2012 Perennial Grasses 18.7 36.7 41.6 Perennial Forts 0.9 2.2 6.5 ' Y shrubs 0.3 0.2 0.2 't Annuals Biennials 36.5 8.1 19.5 22 _ Utter 19.7 42.4 24.7 ^« t Standing Dead - - - Rock 0.9 0.4 0.2 Bare Ground 22.9 10.0 7.S Ground Cover 100*0a 80% - REVEGETATION SPECIFICATIONS Unit: EP043 acres: 13.9 60% , Location: '. East Pit First Growing Seasonal 2003 # 2009 Success Criterion - Topography: L' 431%Perennial Cover Aspect: NE Avg. %Sb : ° 40% Regrading Notes:! 20% To p soil: Mo/yr of Placement: i Depth of Placed Topsoil. Surface Preparation: I gd 2004 2006 2009 2011 2012 Soil Augmentation Activities Mo./Yr. Ibs/ac. Wood Plant Densi co untable Shru bs Growing Seasons --> 2 4 7 9 10 Year Sam --> 2004 2006 2009 2011 2012 YOU & Mature per acre 267 192 188 Seeding Dominant Grass Speci es* Woody Plant Density Method:; Most Current Year Onl ) 1200 Total # PLS/ Acre: 13.65 S d d S i PerCtl1t R.I. 1000 Mo./Yr. of Seedin i ee e pec es cover u 800 Species Seeded: R PLS/ac. Stmambank Wheatgrass 12.63 Grosses 3.46 Cicer Milkvetch Forb 8.42 is 600 Thicks Ike When mss 0.34 Western Wh rass 5.17 ° 400 Strmmbank Whmran Bl b h w B dl 0.34 0 67 Slender Wh rest B dl Bl h W b 4.87 4 28 > 200 ue uM . ear ess Waste-wheat rots . 0.79 ear ess unc . ue Basin Wildrye . 4.21 3 0 Slender Whey ran Mountain Brome 0.49 0.48 icks ke Wh rass 3.18 2004 2006 2009 2011 2012 Basin Wild a 0.20 Current Annual Producti on Pounds r Acre Roc Mtn. Fescue 0.10 Growing Seasons --> 2 4 7 9 10 Big Bluegrass 0.05 Volunteers Year Sampled --> 2004 2006 2009 2011 2012 Forts 3.06 Kentucky Bluegrass 21.42 Perennial Grasses 947.8 Westem Yarrow 0.04 la nese Brome 15.88 Perennial Forbs 177.7 Louisiana Sae 1.04 Chea rats 9.82 Sub-Shrubs - Pacific Aster 0.02 Smooth Brome 4.06 Annual Grasses 260.2 Cicer Milkvetch 0.30 Bluebunch Wheat grass 1.03 Annual Forts 5.0 Lewis Flax 0.09 Total 1,390.7 Saintoin 1.45 * Taxa w/ 1% composition - taxa Palmer penstemon 0.06 counting toward diversity standard Current Annual Production 2000 Rocky Mtn. Penstemon 0.06 (3%<X<50*/o) are blue Shrubs 7.13 Remediation / Weed Control Se viceber 1.69 Measures / Other Notes: 1600 Silver Sage 0.06 Fringed Sae 0.01 1200 Big Sagebrush 0.02 Fourwi saftbush 0.84 Winterfat 0.51 0 Rubber Rabbitbrush 0.04 Shrub Qualified* Acres 02 C 800 2009 success Criterion = Antelope Bitterbrush 2.90 (>150 Stems per Acre) ° ?,4$P.SSC41U?l1DS/A4:C.... ................................... ........ wood's Rose 0.48 Mountain Snowberry 0.58 0.58 Acres aoo *Shrub patches were delineated using i li 0 300 stems per acre as a gu ne. de Therefore additional acres may qualify 2004 2006 2009 2011 2012 , . RECOMME NDATIONS Diversity unit is progressing well no remediation necessary. 2 Perennial grasses between 3% and 50% Relative Cover Monitor again in 2012. Success Criteria. Farb Relative Cover between 1% and S00/6 Growing Seasons --> 2 4 7 9 10 Year Sam ed--> 2004 2006 2009 2011 2012 Number of Perennial Grasses 6 8 Forts % Relative Cover 7.9 12.6 CEDAR CREEK ASSOCIATES, Inc. Page 17 Colowyo Mine 2009 Revegetation Monitoring Report