PERMFILE44628 - Laserfiche WebLink

Home Browse Search

25 SOILS INFORMATION SEC 12 & 1J, T15N, R17W, NMPM STONE GRAVEL PIT DAREN STONE -PROPRIETOR EXHIBIT I Soils at the site aze primarily aeolian accumulations of clayey silo deposited upon the gravelly alluvial faze of the Ute iVfountain grazritics outwash. Test piu dug to depths of up to 12 feet showed a thin poor soil horizon underlain by humus-poor silty clays in depths of from 2 to 8 feet. Gravel terraces underlie the soils over most of the site to 12-foot depths or more. The gravels aze sand-poor accumulations of pebble to boulder sized semi- aztgulaz to sub-rounded porpheries folrlrerty outwashed from the steep slopes of the Ute Mountain uplifted bathofith. The aeolian and alluvial soils are in turn underlain by the highty weathered lower unto of the Mancos shale and the upper sandstone beds of the Dakota sandstone. The Natwal Resowces Conservation Service (formerly S.C.S.) soil survey names these soils SIL4RPES LOtLbl (Soil Uniu ROL-Cl, ROL-Dl, & RY-CI ). The following printout describes their general characteristics more definitivety. ROL-C SIL4RPS LOAM 3 TO 6 PERCENT SLOPES The Sharps soil is moderately deep and well drained on hillsides, uplands, ridges, and mesa tops. Typically the surface layer is loam about 9 inches thick The upper part of the subsoil is clay loam about 10 inches thick. The next part is loam 6 inches thick The lower part of the subsoil to a depth of 30 inches is loam. Shale or soft sandstone is at a depth of 30 inches. Permeability is moderately slaw. Available water capacity is low. Effective root depth is 1 to 40 inches. Runoff is medium, and the hazard of water erosion is moderate. Depth to soft bedrock ranges from 20 to 40 inches. If this unit is used for irrigated crops, the main limitations are potential erosion hazard, short growing season, and depth to rock Sprinkler irrigation can be used, but water needs to be applied slowly to minimize runoff. Some small areas of this unit have large stones. Removal of the stones may 6e necessary to prevent damage to equipment. If this unit is used for non-irrigated crops, the main limitations are potential erasion hazard, depth to rocl~ short growing season, and limited precipitation. ~ It can be readily seen that the difference between the proposed site and the typical Sharps Loam described in the soil survey is the alluvial fan "outwash" upon which the aeolian soils are deposited. These alluvial gravel deposiu are the resowce to be mined.