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Officer reviewed the 1983 application/permit revision, the 1986 permit <br />revision, and the 1993 permit revision and has determined that there are no <br />sites within the permit area currently listed i,n the National Register of <br />Historic Places. <br />Additionally, although not required by Colorado regulations, within the <br />federal Regulations there is a further consideration of "cultural and historic <br />resources eligible for listing on the National Register of Historic Places." <br />Surveys classified seven of these sites as eligible for the National Register <br />pending further investigation. None of the seven is going to be disturbed by <br />development activities, and none will be undermined. The Roatcap Game Trail <br />Site (5DT 271) was excavated in late 1986 to ensure that increased access in <br />the East Roatcap drainage would not result in vandalism. Several of the other <br />sites have a very limited potential for subsidence damage, as they are found <br />on the margins of the angle of draw. <br />Climatological Information and Air Resources - Rules 2.04.8, 2.05.4(2)(h), <br />2.05.6(1). 4.17 <br />Climatological documentation is presented on pages 58-66, Section 2.04 of <br />Volume 1 and in the Climatology and Wind Direction Appendix, Volume 9. COVCC <br />has also provided copies of all emissions permits from the Colorado Department <br />of Health in Volume 9. Climatological data for the North Fork region is <br />available from Paonia, three (3) miles due south and 1,500 feet lower in <br />elevation than the mine site. The average annual temperature is 49.0°F at <br />Paonia, with an average monthly mean of 24.5°F in January and 71.9°F in July. <br />At Paonia, the annual precipitation is 8 to 15 inches. <br />The local climate of the North fork area is strongly influenced by <br />microclimatic features - slope aspect, elevation, soil type, soil moisture <br />content and vegetation. The steepness of the terrain, together with the type <br />and amount of vegetation, orientation and range of elevation, are the major <br />controls of the diurnal wind patterns. The shape and orientation of the North <br />Fork valley is such that the drainage (or katabatic> flow is the dominant flow <br />for most hours of the day. Prevailing winds are from the south-southeast, <br />with wind speeds of ten (10) miles per hour occurring in June. Below Paonia, <br />the wind speed appears to decrease sharply as the air spreads over the lower <br />valley. Because of this strong drainage wind, frost pockets are not allowed <br />to form, thus creating a favorable microclimate for fruit tree farming. <br />Geology - Rules 2.04.5 and 2.04.6(2) <br />Information on local and regional geology can be found on pages 15 to 26 of <br />Section 2.04.6 of Volume 1. Maps 2-1, 2-2, 2-7, 2-8, 2-11, 2-12 and 6A-8 <br />identify pertinent geologic features. Waste rock geochemical analyses can be <br />found in Volume 6A. <br />Cyprus Orchard Valley mines the D seam of the Upper Coal member of the <br />Mesaverde Formation. The seam ranges in thickness from 2 to 21 feet in the <br />permit area, with one split ranging in thickness from 15 1/2 feet to several <br />inches. The coal dips 4° to 7° to the northeast. Two high-angle, normal <br />fault zones are found in the area with displacement ranging between 1 and <br />50 feet (Map 2-8). The earliest fault system trends N65°E and dips 70° to 80° <br />with displacements of 2 to 6 feet. The other fault system trends N35°W and <br />-10- <br />