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~~~ 0~~ <br />rm'irovnrmal tnrnnm and vneinrnt <br />• <br />Estimates of stockpiled topsoil volumes. The largest stockpile (Stockpile #2) occurs about <br />500 feet northeast of the loadout area. This stockpile is estimated to be abort[ 3 acres in <br />size and contain about 44,500 cubic yards of material. The volume estimate is based on a <br />6-foot depth on about 20 percent of the stockpile, and a 10-foot depth on 80 percent of the <br />stockpile. <br />The chazacteristics of topsoil in Stockpile #2 mere examined at the three locations shown <br />on Exhibit 9-1. Soil samples were collected from Stop 23 at two depths-3 to 5 feet, and <br />5 to 6.5 feet. Topsoil quality is good. SAR and EC values aze low. Both soil samples <br />had a silty clay loam texture. Carbonates are slightly elevated, ranging from 8 to 12 <br />percent in the two samples. <br />The next largest stockpile (Stockpile #1) occurs southwest of the rail loop near the <br />intersection of the HG-1 haul road and Routt County road 53. The stockpile is estimated <br />to be 50 feet wide and 325 feet long with an average depth of 4 feet. Using these <br />estimates, about 2,400 cubic yards of soil material is stockpiled. The characteristics of <br />topsoil in Stockpile #1 were examined at three locations as shown on Exhibit 9-I. Soil <br />• samples were collected from Stop 27 at two depths-1 to 3 feet, and 3 to 5 feet. Topsoil <br />quality is good to a depth of 3 feet. The 3- to 5-foot increment had elevated sodicity and <br />salinity levels. <br />The third stockpile (Stockpile #3) is located about 1,500 feet northwest of the loadout <br />area. This stockpile is estimated to be 210 feet wide and 350 feet long with an average <br />depth of 3 feet. Using these estimates, about 8,200 cubic yards of soil tuaterittl is <br />stockpiled. The characteristics of topsoil in Stockpile #3 were examined at two locations <br />as shown on Exhibit 9-1. Soil samples were collected from Stop 31 at two depths-0 to 2 <br />feet, and 2 to 3.5 feet. Tepsoil quality is good in the 0- to 2-foot increment. Carbonates <br />are high (25%) in the 2- to 3.5-foot increment. Textures are silty clay loams and silty <br />clays. <br />Topsoil tlrickrress on the railroad embankment. Topsoil material occurs at all locations <br />examined except for a steep cut slope northwest of the loadout area. Two types of topsoil <br />material are present. A sandy loam material with about 30 to 40 percent gravels and <br />cobbles occurs on the upper portions of the embankments near the actual rail line. This <br />material also occurs at Stops lE, 1W, 2E, and 2W on the railroad embankment north of <br />the irrigation ditch. On a13 other areas, the embankment and cut slopes are covered ~vi[]t a <br />-3- <br />