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Don Macdonald; CEC Page 6 of 6 <br />2011; ARR Review <br />April 3, 2012 <br />composition. All reclaimed areas demonstrate a diverse array of desired plant species have established at the site. <br />The data would indicate as time elapses from final revegetation seeding, desired perennial grass species are able <br />to out compete the pioneer annual species and total mean percent cover increases. For herbaceous production, the <br />reported data would indicate all of the reclaimed areas meet the revegetation success criteria. However, the <br />Division cannot verify if this is correct since the production data was not reported by life form. <br />The Operator conducts quarterly inspections for pests, noxious weeds or disease to the revegetation species. It <br />would appear these inspections do not make note of noxious weeds listed as "List U species on the State Noxious <br />Weed list. Cheatgrass; a List C noxious weed, is a very dominant species at the site. Based on the data, it would <br />appear as time elapses from the date of the final revegetation seeding, the relative cover percent of Cheatgrass <br />decreases. CEC will need to continue to monitor for this species and treat it as necessary with approved weed <br />control methods. For bond release purposes and future vegetation monitoring, cover and herbaceous production <br />contributed by Cheatgrass should not count toward revegetation success measures. Also, as discussed above, the <br />contribution of annualibiennial species to cover and production applied toward the revegetation success standards <br />cannot exceed approved amount. <br />This concludes the Divisions review of the 2011 Annual Reclamation Report for the Keenseburg Strip Mine; C- <br />1981 -028. The 2011 Annual Hydrology Report is still under review. <br />If you have any questions, please feel free to contact me at (303) 866 -3567 ext. 8120. <br />Sincerely, <br />Jared Ebert <br />Environmental Protection Specialist <br />