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combined area by establishing a new dryland reference on 6.8 acres approximately 20 feet <br />east of the combined area. (A 20 -foot strip of land separates the two areas because it has <br />been used as a roadway.) CDMG required a study to verify the proposed separate dryland <br />reference area was statistically similar to the combined reference area. TR -53 established the <br />separate dryland reference in 2005, with the former combined area to continue to serve only <br />as the rangeland reference area. Attachment 2.04.10 -1 shows the general locations of all <br />previous and current reference areas and also shows the detailed location of the current <br />separate rangeland and dryland reference areas. Attachment 2.04.10- 4 is the report on the <br />comparison study done by Bio -Logic Environmental for the 2000 and 2005 in- airport reference <br />areas. The report conclusion states that "because total cover and production at the two sites <br />are very similar, and the sites are similar in other respects, the new airport reference area <br />appears to be an acceptable reference area for the dryland pasture type ". This area is now <br />known as the 2005 Reference Area. <br />6.15 Irrigated Pasture Reference Area <br />Up to Technical Revision 58 of 2009, the standards for revegetation of Irrigated Pastureland <br />were based on written letters from the nearby farmers in 1998 based on their recollection of <br />average production from the irrigated pasture fields. The standard was 90% of 1.5 tons per <br />acre for the 1' cutting. It is hardly scientific and is vulnerable to yearly problems with variation <br />in ditch flows, precipitation, etc. TR 58 established an irrigated pasture reference area <br />immediately southeast of the permit area, on land that is flood irrigated with the same ditch as <br />the reclaimed area. The area is 6.81 acres and will utilize 10 shares of water. WFC has <br />employed the same management company for the reference area as the reclaimed area. <br />A detailed method has been established to account for differences in soil type between the <br />reference area and the reclaimed irrigated pasture areas for bond release. This is discussed in <br />detail in Section 2.05.4(2)(e) Revegetation. Also, all detailed procedures for measurement and <br />evaluation of the reference area as well as the reclaimed areas are included in Section <br />2.05.4(2)(e) Revegetation. <br />7.0 Summary of Pre -Mine Vegetation Areas <br />Revised September 2010 (PR 06) 2.04.10 -93 <br />