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` minimum, texture; and analyses to identify those horizons which contain <br />potential acid-forming, toxic-farming or alkalinity-producing materials. <br />(b) An applicant may request that any requirements of 2.04.6 <br />(2)(a)(iii) be waived by the Division. The wavier may be granted only if <br />the Division makes a written determination that the statement required is <br />unnecessary because other equivalent information is available to it in a <br />satisfactory form. <br />RESPONSE: <br />Geologic Setting and Structure <br />The coal seam to be mined at Mine No. 3 is located at the <br />southeasternmost tip of the Yampa Coal field of the Green River <br />Region. The Yampa Coal Field is a synclinal extension of the <br />• Washakie-Sand Wash Cultural Basin situated in northwestern Colorado and <br />south-central Wyoming. The main axis of the basin is highly modified <br />by numerous smaller anticlines, synclines and faults. The boundary of <br />the Yampa Coal Field is defined on the east by the Park Range Uplift. <br />This structural setting is outlined in Figure 1, Geologic Structural <br />Setting. <br />Structurally, the proposed permit area is situated along the east flank <br />of the locally significant Twentymile Park Syncline. In this <br />location, the syncline trends north-south and is doubly plunging to <br />form a structural basin northwest of the proposed permit area. The <br />average dip of the mineable coal seam (the "Wadge") and <br />• <br />PRen 2.04-23 Revised 06/15/90 <br />