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Map unit 98D has thinner Quaternary eolian deposits than map unit 98E with a mean depth to <br />bedrock of 30 inches. These deposits have developed cambic horizons, weak argillic horizons <br />and secondary accumulations of carbonates. The accumulation of carbonates is reflected in a <br />higher pH in the Bk and Btk horizons. The pH in A, Ap, ABt, Bw and Bt horizons (Lift A) <br />averages 7.7 and in the Bk Btk and C horizons (Lift B ) averages 8.1. <br />Map unit 98E consists of areas of deep Quaternary eolian deposits. These Quaternary deposits <br />overlie Dakota Sandstone and Burro Canyon Formations with depth to bedrock ranging 40 <br />inches too greater than 72 inches with a mean depth of 53 inches. These deposits have <br />stabilized and formed cambic horizons and in some places weak argillic horizons. Additionally, <br />they have developed secondary accumulations of carbonates. The accumulation of carbonates <br />is reflected in a higher pH in the Bk and Btk horizons. The pH in A, Ap, ABt, Bw and Bt horizons <br />(Lift A) averages 7.7 and in the Bk Btk and C horizons (Lift B) averages 8.2. Soil in this map <br />unit is used primarily for irrigated pasture and hay crop. Barx soil is the second component (30 <br />percent) in this map unit. Barx/Darvey is a prime farmland soil in San Miguel County, Colorado <br />if the soil is irrigated by an adequate and dependable water supply. In Attachment 2.04.9 -6 is a <br />letter from the Montrose County NRCS stating that Barx/Darvey soil in the original permit area <br />does not have an adequate or dependable water supply for irrigation. Barx/Darvey soil was <br />therefore not considered prime farmland soil in the original survey area. However, a revised <br />assessment was made by the NRCS in February 2008 (Attachment 2.04.9 -10). As of February <br />15, 2008, the entire field south of BB Road and west of 2700 Road containing this unit is <br />considered prime farmland soil since it is more than 67% prime farmland soil type, and is being <br />handled as such by the Western Fuels - Colorado LLC. This property is entirely owned by <br />Morgan. <br />Map unit 98F occurs in natural drainage areas that eventually form shallow valleys on the mesa <br />and on the low lying area near Tuttle Creek. Depth to bedrock varies widely in this map unit. <br />Haplargids with varying depths to bedrock form on drainage side slopes. Endoaquepts are <br />formed where irrigation water has accumulated in drainage bottoms. In a few naturally occurring <br />areas of water accumulation Endoaquolls have formed. <br />(Revised October 09) 2.04.9 -27 <br />