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June 28, 2013 2010 sampling summary and weighted average examples <br />In order to illustrate how the approved reclamation success criteria would be applied IF a reclamation <br />success comparison would be made (please realize that the 2010 vegetation monitoring was not <br />conducted to be used as bond release data, and was not collected to adequacy). The following examples <br />are provided to illustrate how the reclamation success criteria would be applied and how a proposed <br />change to the location of the PJ reference area could impact the reclamation success criteria. <br />2010 Vento reclamation cover = 60.3% total vegetative cover. <br />This value would be compared to the weighted average between the two reference areas <br />If we use the proposed PJ reference area and the 1980 Grassland data (for illustration only - <br />at bond release the operator would sample both reference areas and reclaimed areas during the same <br />growing season). <br />0.90[(0.798 x 19.1) +(0.202 x 23.07) <br />= .90[(15.24) + (4.66)] <br />=17.9 % total vegetative cover <br />So the minimum cover standard the reclaimed mine area would need to meet equals 17.9% cover based <br />on the example data. As can seen by the 2010 sampling results the total vegetative cover measured on <br />the Vento property of 60.3% total cover the reclaimed area exceeds the minimmum requirement for <br />reclamation success for cover. <br />If we applied the 1980 data from the Plot B reference area to the weighted reference area formula; <br />0.90[(0.798 x 19.1) +(0.202 x 11.39) <br />= .90[(15.24) + (2.3)] <br />=15.8 % total vegetative cover <br />The minimum cover standard the reclaimed mine area would need to meet equals 15.8% total <br />vegetative cover based on the example data. The 2010 sampling results of cover measured on the Vento <br />property was 60.3% total vegetative cover. The reclaimed area exceeded the minimmum requirement for <br />reclamation success for vegetative cover based on this example. The proposed PJ area would result in a <br />higher cover standard 17.9% total vegetative cover versus 15.8% total vegetative cover. <br />For production success, 2010 Vento reclamation production = 1523.3 Ibs /acre. This value would be <br />compared to the weighted average between the two reference areas. If we use the proposed PJ reference <br />area and the 1980 Grassland data (for illustration only -at bond release the operator would sample both <br />reference areas and the reclaimed areas during the same growing season) <br />0.90[(0.798 x 1000) +(0.202 x 190) <br />= .90[(798) + (38.4)] <br />=752 Ibs /acre herbaceous production <br />752 Ibs /acre would be the minimum herbaceous productivity that the operator would need to achieve for <br />productivity reclamation success. The 2010 data measured 1523 Ibs /acre on the Vento property, which <br />would exceed the minimum required herbaceous productivity for the data used in this example. <br />