2010-03-12_REPORT - C1981019 (8)

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?. Compendium 2 - EP042 REVEGETATION DATA Ground Cover' % Growing Seasons --> 2 4 7 9 10 Year Sampled--> 2004 2006 2009 2011 2012 Perennial Grasses Perennial Forbs Shrubs Annuals Biennials 1.0 0.1 0.1 61.7 9.0 0.5 - 37.0 33.6 0.9 0.3 34.4 ?r r Litter 16.9 37.3 18.2 Standing Dead - - - Rock 1.0 1.2 - Bare Ground 19.2 15.0 12.3 Ground Cover 100% e0% REVEGETATION S Unit:', Acres: 21.0 Location:! East Pit Season:`. 2002 60°? a 2009 Success Criterion = Topography: .. .......... ..... ......... 43.1% Perennial Cover .............. ....... ...... Aspect: , NE 1 Slope:; 40% Regrading Notes:i 20% - Topsoil: Mo/Yr of Placement: Depth of Placed Topsoil! R Surface Preparation:' 0% 2004 2006 2009 2011 2012 Soil Augmentation Activities o./Yr. Ibs/ac. Wood Plant Density Countable Shr ubs) Growing Seasons --> 2 4 7 9 SO Year Sampled--> 2004 2006 2009 2011 2012 Young & Mature per acre 372 119 119 Seedin s Species* Dominant Woody Plant Density Method:{ earOn l y) 1200 Total s PLS / Acre:I 20.21 eded S ie S veant 1000 MO./Yr. OP $eedin ( e pec s R.I. Co- Species Seeded: # PLS/ac. none 800 Shrubs Serviceha 20.21 1.69 n 600 Fringed Sae 0.01 Volunteers y 400 R S b h 03 0 K t k Bl 26 91 8 200 age rus Fourwin solthush . 0.84 en uc uegrass irks ike Wh rass . 8.78 3 0 ountain Mountain Mahogany 0.77 0.22 22 Western Whey rd55 Cheatgra55 6.33 36.9 .91 2004 2006 2009 2011 2012 Rubber Rabbitbrush 0.11 Ja nese Brome 11.22 Current Annual Producti on Pounds per Acre Low Rabbitbrush 0.03 Mountain Brome 2.45 Growing Seasons --> 2 4 7 9 10 Squaw Apple 0.84 Crested Wheatgrass 1.15 Year Sampled--> 2004 2006 2009 2011 2012 Black Chokeche 9.08 Bottlebrush uirrehail 1.15 Perennial Grasses 1,117.0 Antelope Bitterbrush Skunkbush Sumac 2.90 2.15 Perennial Forbs Sub-Shrubs 15.7 - Wood's Rosa 0.96 Annual Grasses 265.5 Mountain Snowberry 0.58 Annual Forbs Total 3.6 1,401.8 * Taxa w/ 1% composition - taxa counting toward diversity standard Current Annual Production 2000 (3%<X<SO%) are blue Remediation/ Weed Control Measures / Other Notes: 1600 1200 v 800 Shrub Qualified* Acres a 2009 success Criterion = (>1505tem5 per Acre) ° 548 Pe ?enni?l lbs?at;e A ,,,, cres 6.98 400 *Shrub patches were delineated using 300 t id li 0 s ems per acre as a gu ne. e Therefore additional acres may qualify 2004 2006 2009 2011 2012 . , RECOMME NDATIONS Diversity Perennial round cover is lo w for 7-year old reveg, but it is increasing 2 Perennial grasses between 3% and SO% Relative Cover Due to shrub only seed mbt. Success Criteria Forb Relative Cover between 1% and 500/b Recommend monitoring annual for the next few ears with round cover Growing Seasons --> 2 4 7 9 SO only, unless on the three year cycle Year Sampled --> 2004 2006 2009 2011 2012 Annual bromes probably require attention. Number of Perennial Grasses 0 1 3 Forbs (% Relative Cover) 0 17.3 2.6 CEDAR CREEK ASSOCIATES, Inc. Page 15 Colowyo Mine 2009 Revegetation Monitoring Report