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Site Description (copt'd1 Exhibit B <br />NRCS Soils Information <br />5G <br />chealgraSS Invade. The average annual production of <br />air-dry vegetation is ahou1800 pounds per acre. <br />Seeding late 4t lad helps to ensure estab115hment of <br />scedlings the following spring when the content or <br />moisture M me soil Is more likely to be adequate. <br />Native grasses that can be seeded in areas of mis unit <br />are weslem whealgrass, naetlteandthreed, bluebunch <br />wheatgrass, and Indian dcegrass. Inboduced grasses <br />that may ba considered for pasture planting are <br />crested wheaigmss and Russian wlldrye. The plants <br />selected for seeding should meet me seasonal <br />requirements of livestock wilcAile, or both. Brush <br />management can knprove tleteriorale0 areas of range <br />that are producing moro woody shrubs ttan were <br />present In the potential plant community. Boilable <br />management practices include proper rongo use, <br />deferred grazing, and a planned grazing system. <br />Grasses and legumes grow well it adequate <br />fertilizer is used. Leveling helps to ensure me uniform <br />apps'cation of water. Proper grazing pracUCes, weed <br />control, and fertilizer are needed to ensure maximum <br />quality of loraga. Because of the moderately rapid <br />permeability in Ihls soil, adjusting the length of runs is <br />necessary to pemNt adequate NfiUratbn of water. <br />This soil is only a fair source of reconstruction <br />material for drastkally dsturbetl areas because of the <br />limited available water capacity. <br />The capability dassibcation Ls 4e, nonlnigated. This <br />unU Is In the Rolling Loam ecological silo x298. <br />4~Happle very channery sandy loam, 12 <br />to 25 percent slopes <br />This deep, well tlrainedsoil is on alluvial-colluvial <br />cans and toeslopes. It loaned in collwium and <br />alluvium derrvatl dominantly born the Green Alver <br />shale lortnation. The native vegetation a mainly <br />sagebrush, grasses, and toms. Elevation Is 5,400 to <br />6,20Dtee1. The average annual precipitaton is 1210 <br />75 ktafes, the avemge annual a)r temperature Is 4S to <br />52 degrees F, and the average frost-free period Is 100 <br />to i 5D days. <br />Typicalty, the surtace layer is lightgray very <br />channery sandy loam about 7 inches thick. The upper <br />part of the unrklrtying material Is very pale sown very <br />channery sandy loam about 7 inches thick. The next <br />pert is Ilght gray very channery sandy clay loam about <br />18 inches thick The lower part of the untlertying <br />material to a depth of 80 Inches or more Is Tight gray <br />oxlremety channery coarse sandy loam. <br />Included in mapping are small areas oI Debepua <br />very channery loam. Included areas make up about 20 <br />percent of the Iofal aoreage of this untt. The <br />percentage varies from one mapped erne to another. <br />Soil Survey of <br />Permeability 6S moderate In fhe Heppla Sod. Tho <br />available water capacity is low. Tho efleclive rooting <br />depth )s 607nches amore. Runoll !s medium, and the <br />hazard al water erosion is severs. <br />This untt Is used for liveatork gmzYtg of as wildlife <br />habitat. <br />The potential plant community is mainy bluebunch <br />wheatgrdss, needleandthmad, westam wheatgrass, <br />IndWO ricegrass, true mountain mahogany, an0 <br />Wyoming big sagebmsh. Other less extensive grasses <br />era mutlongmss and a variety of (orbs. II range <br />condition declines as a result of overgrazing, all the <br />grasses writ decrease and (orbs and shrubs will <br />increase. If continued r191edoratlon is allowed, Russian <br />thistle and chaatgrass invade. The average annual <br />production oiair-dryvcgata8on Is about 750 pounds <br />per acre, <br />Range seetllrlg generally is IimUed to broadcasting <br />because al the slope and the stenos on the sudace. <br />Seeding late M tall helps io ensure esfabfl5hment of <br />seedlings the followirg spring when the content of <br />mgislure In the sdl Is more Ilkety to be adequate. <br />Adapted native grasses are bluebunch wheatgrass, <br />Indian rkegrass, and western wheatgrass. Inirotluced <br />grasses that may he considered for pasture planting <br />Induce crested wheatgrass and pubescent <br />whealgrass. Selection of species should be hosed on <br />Tho needs of livestock and wndGte. The use Of <br />mechanical equipment for hmsh conaol Is not <br />practical because of the slope and the stones on the <br />surface. Suitable management practices Include <br />proper range use, deferred grazing, and aplanned <br />grazing system. <br />This soil is onty a Ialr source of reconstruction <br />material far drasfically dsNrbed areas because of the <br />limited available water capacky. <br />The capability classification is 6e, noninigated. This <br />unit is in the Loamy Sbpes ecological Site 5303. <br />4S-Napple-Rock outcrop association, 25 <br />to 65 percent slopes <br />This map unit is on side slopes andcanyon rims. <br />The native vegetation Is matnly sagebrush, grass, and <br />toms. Elevation is 6,200 to 7,2001eet. The average <br />annual precipitation IS 12 to 15lnches, the average <br />annUSl air temperature is 46 to 52 degrees F, and the <br />average iroshlree period Is 100 to iS0 days. <br />This unit is about 50 percent Heppla very channery <br />sandy loam and 35 percent Rock outcrop. The Happle <br />soil Is on the lower part of the sbpes, and the Rock <br />outcrop is on U1e upl»r part (/ig. 10). <br />Included in mapping are small areas of soils that <br />are similar to me Happle soil but are 5tallow or <br />United States. United States Department of Agriculture, Natural Resources Conservation Service. Soil Survey of Douglas- <br />Plateau Area, Colorado, Parts of Gazfield and Mesa Counties. By David K. Alstatt. Colorado: 2003. <br />NORTH CLEAR CREFIC CONSTROC7ION MATERIALS MINE CORDILLEAAN COMPLLINCE SERVICES, INC <br />E05574 PAGESOE 21 GRAND]GNCIiON, COLORADO <br />