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Section 779.22 (a) Continued. <br />improvement is impractical. Areas where these soil classes are <br />found are in Eckman Park to the southwest of Pinnacle Peak. P;ative <br />vegetation is sagebrush and aspen. All of these lands are currently <br />used as rangeland. <br />Class JIII. Commercial plant production on these soils is im- <br />possible on the proposed permit area. Only steep rocky cliffs are <br />found within this class. All of this land is currently used as <br />rangeland within the boundaries of the proposed permit area. <br />Subclasses. With the exception of the areas along Fish Creek, <br />Foidel Creek and Middle Creek where land capab?lity is restricted <br />uy soil wetness, the predominant limitations for agronomic purposes <br />is the risk of erosion. <br />Present productivity of the lands is largely determined by the <br />• extent and nature of the present vegetation found growing within <br />the proposed permit area. Although small in acreage, the cropland <br />and pasturelands are important for livestock and wildlife produc- <br />tion. The climatic, hydrologic, vegetal anu edaphic factors <br />control plant growth which i^ turn controls animal productivity. <br />These factors are all closely related in terms of site productivity <br />and potential. <br />Hydrological Capability <br />As explained in detail in the discus~iotis under Sections 779.15 and <br />779.16, the available ground and surface water supplies in the <br />mine plan aad adjacent area are limited in quantity and quality. <br />Yields to private stock-watering and domestic wells are commonly <br />less than 10 gallons per minute of hard, alkaline, moderately <br />saline water. No springs or other major ground water discharge <br />points occur in the mine plan area. Surface water supplies are <br />limited by temporal flow in the ephemeral and intermittent streams <br />779-307 <br />