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2020 Reclaimed Areas Phase H Total Vegetation Cover Success Criterion <br />Xbar <br />S <br />Number of samples <br />Number of samples for sample adequacy <br />2020 Extended 2020 Reclaimed Areas <br />Reference Area <br />11.06%(') 55.07% <br />5.63% 1 6.04% <br />15 1 15 <br />1 1 2 <br />(1) Vegetation success criterion is the total herbaceous cover of the extended reference <br />area (sum of graminoid and forb cover) <br />Based on the results of the 2020 quantitative sampling, the reclamation areas exceeded the <br />revegetation total live vegetation cover success criterion of 11.06 percent, thereby meeting <br />the revegetation success criterion and supporting the post -mining land use. <br />Phase II Bond Release Reclaimed and Revegetated Areas Reclamation Success: <br />Species Composition (2020) <br />The Elk Creek Mine permit document specifies that to meet the requirements of the <br />revegetation success criterion for species composition, species composition on any eligible <br />reclaimed area will be successful when there are three or more perennial or biennial plant <br />species of which two are graminoids and one is a perennial or biennial forb or shrub. No <br />one component of the above three species should comprise greater than 60% relative cover <br />nor less than 2% relative cover, during a given year's quantitative sampling. <br />The following reflects the number of individual species required by the success standard <br />and the number of individual species encountered in quantitative sampling this year at the <br />eligible reclamation areas. <br />Total Perennial Species* <br />(>2% rel. cover) <br />Cool Season Grasses* <br />Cool Season Forbs or Woody <br />Plants* <br />Relative Importance <br />(2%<x<60%) <br />Success 2020 Reclaimed Areas <br />Standard <br />3 7 <br />2 4 <br />1 3 <br />All All Species <br />Species <br />* Numbers reflect only those species meeting the relative importance percentage limitation and does <br />not include any prohibited species <br />The 2020 Phase II reclamation areas exceeded the requirements for species composition, <br />thereby meeting the revegetation success criterion and supporting the post -mining land use. <br />........................................................................ <br />Oxbow Mining, LLC Elk Creek Mine Page 7 <br />SL -03 2020 Phase 11 Bond Release 5ynopsi5 <br />