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MINOR REVISION NO. 46 <br />MODIFICATION OF PERMIT DOCUMENTATION <br />COORS ENERGY COMPANY <br />PERMIT NO. C- 1981 -028 <br />In submitting this Minor Revision No. 46, Coors Energy Company (CEC) seeks to modify <br />several components to the Permit. <br />The first modification CEC is seeking is a correction to the Total Vegetation Cover equation on <br />page 116B. The equation was listed as y= 0.0127x3+0.2115x2 +2.1772x. The correct equation <br />should be y= - 0.0127x3 +0.2115x2 +2.1772x. <br />The second modification is the Contemporaneous Reclamation date for ongoing operations from <br />March 2014 until March 2021. The necessity for this permit modification stems from <br />modifications to mine reclamation operations, mainly the reduction in ash loads from the Golden <br />Brewery power facility. The power facility is transitioning from a solely coal fired plant to a co- <br />fired plant using both coal and natural gas. Based on current projects, it is anticipated that the <br />mine will be filled during the year 2021. CEC requests a modification of the date for <br />Contemporaneous Reclamation from March 2014 to December 2021. <br />The third modification CEC is seeking is an adjustment to the bonding amounts with this Minor <br />Revision based on a revised estimate by the State. The new bond amount is estimated at <br />$1,971,874. As such, CEC proposes to issue a new bond for this amount. <br />The Division's approval of this Minor Revision No. 46, to modify the permit as mentioned, is <br />hereby requested. <br />