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6.4.9 EXHIBIT I - SOILS INFORMATION <br />Weld County, Colorado, Southern Part <br />1—Altvan loam, 0 to 1 percent slopes <br />Map Unit Setting <br />• Elevation: 4,500 to 4,900 feet <br />• Mean annual precipitation: 14 to 16 inches <br />• Mean annual air temperature: 46 to 48 degrees F <br />• Frost -free period: 130 to 150 days <br />Map Unit Composition <br />• Altvan and similar soils: 90 percent <br />• Minor components: 1 percent <br />Description of Altvan <br />Setting <br />• Landform: Terraces <br />• Down-slope shape: Linear <br />• Across -slope shape: Linear <br />• Parent material: Old alluvium <br />Properties and qualities <br />• Slope: 0 to 1 percent <br />• Depth to restrictive feature: More than 80 inches <br />• Drainage class: Well drained <br />• Capacity of the most limiting layer to transmit water (Ksat): Moderately high to <br />high (0.20 to 2.00 in/hr) <br />• Depth to water table: More than 80 inches <br />• Frequency of flooding: None <br />• Frequency of ponding: None <br />• Calcium carbonate, maximum content. 5 percent <br />• Available water capacity: Low (about 5.7 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 3s <br />July 2015 Chavers Mining Resource <br />Regular 112 Permit Application <br />