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Cramer, Johanna <br />From: Bowles, Brock <br />Sent: Monday, December 13, 2010 12:34 PM <br />To: Cramer, Johanna; Hernandez, Alysha <br />Subject: FW: Yoast Mine RN -3 <br />�r <br />E <br />From: Bowles, Brock <br />Sent: Monday, December 13, 2010 12:31 PM <br />To: Burgmaier, Susan <br />Cc: Brown, Sandy <br />Subject: Yoast Mine RN -3 <br />Re: Yoast Mine Permit No. C- 1994 -082 <br />Permit Renewal (RN -03) — Revegetation Success Demonstration Clarifications <br />Hi Susan, <br />In regards to the response letter to Dan Mathews from Roy Karo of the Seneca Coal Company dated Nov 2, 2010, the <br />revisions have been incorporated as follows: <br />1. Dan asked that the minor community (steep mountain brush) be removed for consistency with other portions of <br />the section and to revise the formula. <br />Roy included the minor community with the justification that it is an important component of the premine <br />vegetation and made the necessary changes for consistent language. Dan also asked that the formula be revised <br />to include the premine disturbed area acreage for each of the three primary community types in the numerator, <br />with the combined acreage for the three primary types in the denominator. I am unclear as to what Dan was <br />asking for in the formulas because the formula in question is a multiplication formula that does not have <br />numerators and denominators which are components of fractions (or division). <br />2. Dan asked that the narrative be revised to confirm that each of the reference area community types would be <br />sampled to statistical adequacy as specified in rule 4.15.11. <br />Roy made the appropriate changes to include references to minimum sample sizes outlined in rule 4.15.11. <br />3. Dan asked that the wording be changed in "Alternate Test B- Total Species Density Test" from "mean reference <br />area species density' and "standard deviation" to "area weighted mean reference area species density' and <br />"area weighted reference area species density standard deviation" to reflect that the reclaimed block is being <br />compared to a weighted average standard derived from multiple reference area community types. <br />Roy made the appropriate changes Test B. <br />