2010-03-12_REPORT - C1981019 (8)

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Compendium 6 - S16 Year 10 REVEGETATION DATA Ground Cover % Growing seasons --> 2 4 7 10 13 Year Sampled --> 2001 2003 2006 2009 2012 Perennial Grasses 36.1 45.5 27.4 Perennial Forbs 3.8 2.0 5.1 Photo Unavailable Due Shrubs 0.6 1.3 22.2 Technical Difficult t Annuals/ Biennials 13.9 2.2 6.7 y o Litter 24.9 44.1 33.2 Standing Dead 0.1 - - Rock 0.7 0.7 0.7 Bare Ground 19.8 3.9 4.9 Ground Cover 100% 80% REVEGETATION SPECIFICATIONS Unlt:iS1601 & S16017 Acres:! 25.4 60% uc?eaa Location' Section 16 First Growing Season:; 2000 a Criterion = 43.1% h : T .. P.aremi?l4gret ................ ..... ................. opograp y ao% .'.Aspect:' SE Avg. % Slope: Regrading Notes:! 20% To Soil: Mo/Yrof Placementf Depth of Placed Topsoil; o% Surface Preparation:' 2001 2003 2006 2009 2012 1111 SollAugmentation Activities Mo./Yr. Ibs/ac. Wood Plant Densi Countable Shrubs Growing seasons --> 2 4 7 10 13 Year Sampled -> 2001 2003 2006 2009 2012 Young 8: Mature per acre 703 322 105 Seeding Dominant Emergent Spe cies* Woody Plant Density `Method;) Most Current Year Onl 1200 31 11 tal # PLS / Acre:! T Pacebt Ral . . o I Seeded Species cove, 1000 Mo./Yr. of Seeding Species Seeded: # PLS/ac. Kentucky Bluegrass 24.69 800 20 90 b Grasses 5.06 Basin Wild rye . 600 Thicks ike When rass 0.50 Streambank Whea ram 9.72 ° Streambank whaling- 0.50 Thicks Ike Wh rass 7.03 488 Siberian Wheat rasa 0.25 Smooth Brome 6.69 ; 200 western Wheat rasa 0.67 Western Whea rass 3.17 0 Slender When rasa 0 Brome 3.03 2001 2003 2006 2009 2012 smooth Brome Orchardgrass 2.55 Mountain ell Slender Whey rasa 2.34 Current Annual Producti n Pounds per Acre h d Siberian Whea rass 1.52 Growing seasons 2 4 7 30 13 ar rasa orc Basin Wiklrye Cicer Milkvetch 1.03 Year Sam led 2001 2003 2006 2009 2012 Russian Wild a Perennial Grasses 1,182.7 1,461.4 Hard Fe cue Volunteers Perennial Forbs 9.6 45.7 Timothy 0.13 Crested Whea rasa 9.86 Sub-Shrubs - - Kentucky Blu rasa 0.06 3a nese Brome 1.31 Annual Grasses 1.0 1.1 Forbs 3.81 Annual Forbs 4.4 7.5 western Yarrow 0.06 Total 1.197.7 1.515.6 Cker Milkvatch 1.67 * Taxa w/ 1% composition - taxa Current Annual Production Arrowleaf Balsamroot 0.25 counting toward. diversity standard i l < Lewis Flax 0.33 n b 50%) are ue. (3%<X 2000 Alfalfa 0.13 Rernediation / Weed Control Sahdoin 1.00 Measures / Other Notes: 1600 Palmer ratemon 0.13 Roc Mtn. Ponstemon 0.25 Shrubs 2.44 a 1200 Serviceberry 0.13 Fringed Sage 0.06 e ft sot brush 0.13 Shrub Qualified* Acres 800 2009 Success Criterion = Fourwi sahbush 1.00 (>150 Stems per Acre) ° ,.,,A4$RerealnW(IgslaGrA. Winterfat 0.13 13.06 Acres 400 Rubber Rabbitbrush 0.25 Antelope Sitterbrush 0.50 *Shrub patches were delineated using g Mountain Snowbe O•u 300 stems per acre as a guideline. 2003 2003 2006 2009 2012 Therefore, additional acres may qualify. RECOMM ENDATIONS Diversity This unit is well positioned for bond rel ease. Success Criteria: 2 Perennial grasses between 3% and 50% Relative Cover Monitor again In 2012 if not released. Perennial forb Relative Cover between 1% and 50% Growing seasons --> 2 4 7 30 13 Year Sampled-> 2001 2003 2006 2009 2012 Number of Perennial Grasses 6 7 8 Forts % Relative Cover 7.1 4.0 3.3 CEDAR CREEK ASSOCIATES, Inc. Page 23 Colowyo Mine 2009 Revegetation Monitoring Report