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Exhibit Page 34 • <br />Unit 018 <br />Name Endoaquolls-Ustifluvents complex, 0 to 5 percent slopes <br />Description The map unit is a complex of very deep, somewhat poorly drained to well <br />drained soils on flood plains. Elevation is 7,100 to 8,500 feet. The average <br />annual precipitation is 18 to 22 inches, the average annual air temperature is <br />43 to 47 degrees F., and the average frost-free period is 75 to 100 days. The <br />moisture regime is aquic for the Endoaquolls and ustic for the Ustifluvents. <br />The temperature regime is frigid for both soils. <br />This map unit is 45 percent Endoaquolls and 40 percent Ustifluvents. The <br />components of this unit are so intricately intermingled that it was not practical <br />to map them separately at the scale used. <br />Contrasting Inclusions <br />Included in this unit is about 5 percent Riverwash and open water in the stream <br />course, 5 percent Dalmatian loam and 5 percent Apmay loam, both on river <br />terraces. Dalmatian soils and Apmay soils have dark colored surface layers <br />more than 16 inches thick. Inclusions make up about 15 percent of the total <br />acreage. The percentage varies from one area to another. <br />Vegetation <br />The dominant plant association is Populus angustifolia/Salix exiqua. <br />Deschampsia cespitosa/Carex spp. Occurs in the wetter areas. The native <br />vegetation consists of narrow leaf cottonwood, willows, blue spruce, and <br />common snowberry. Other important plants that characterize this unit are <br />tufted hairgrass, redtop, bluegrass, mountain brome, sedge, Baltic rush, and <br />Woods' rose. The potential production of native understory vegetation on the <br />Endoaquolls soil is about 2,000 pounds of air-dry vegetation per acre, and on <br />the Ustifluvents it is about 1000 pounds per acre. <br />Soil Management Implications <br />The unit is used for livestock grazing, wildlife habitat, and recreation. <br />Mass movement potential is rated very low for this unit because of slope <br />The main limitations to the building of unsurfaced roads on this unit are <br />flooding and high water table. <br />Proper grazing use in conjunction with a planned grazing system is important <br />practices (sic) to ensure the desired quality and quantity of native vegetation. <br />More uniform distribution of livestock is aided by properly locating stock water <br />development and salt, and by fencing and herding. <br />This unit is poorly suited to recreational development. The main limitations are <br />flooding and high water table. <br />Four States Aggregates, LLC 30 DEC 2000 <br />Application for Permit: Line Camp Pit FSA-LCP-D1-001 <br />