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land surface included in this permit application. While some burrowing rodents may be displaced during the rehabilitation --- and construction of the mine access road and the eonstruct.i.on of the hoist and compressor house, none of tl~e larger mammal species will be permanently dislocated during the actual min- - ing operation. All of the bird species found in this area are extremely adaptable and capable of leaving their nesting habi- tat when conditions there change. The Colorado Division of Wildlife has identified the grouse strutting grounds in the Gold Hill area, and the proposed mining operation is not ex- pected to have an adverse impact on the life cycle of this ' game species. Several of the animal species listed above quickly become accustomed to the presence of human beings, and no decrease in the wildlife population was noticed during or after previous operations at this mine. The coniferous forest wildlife habitat is widespread and extensive throughout the general area, and none of the wildlife presently inhabiting the proposed mine site will suffer a permanent loss of food or habitat. Water Resources The surface water drainage on the affected lands consists en- tirely of rainfall and melting snow which flows into Cash Gulch. During most of the year this flow is intermittent, and • it seldom reaches the drainage culvert that passes beneath County Road No. 89. There is a difference in altitude of 400 _ feet between the Cash mine portal and the road, and any water • must flow a distance of 2,100 feet to reach the drainage culvert. The Environmental Protection Agency requires that the follow- ing limitations establish the concentration of pollutants which may be discharged by a point source after application of the best practicable control technology currently available. For Mines: The concentration of pollutants discharged in mine drainage from mines operated to obtain copper bearing ores, lead bearing ores, zinc bearing ores, gold bearing ores, or silver bearing ores or any combination of these ores from open-pit or underground operations other than placer deposits shall not exceed: Effluent-Limitations Average of Daily Values Effluent Maximum for for 30 Consecutive Days Characteristic Any One Day Shall Not Exceed (milligrams per liter) Total suspended solids 30.000 20.000 Cu 0.300 0.150 Zn 1.500 0.750 Pb 0.600 0.300 Hg 0.002 0.001 pH within the range of 6.0 to 9.0 Gold Hill Mining Company geologists obtained water samples from 4 sites for analysis by Hazen Research, Inc., 4601 Indiana Street, Golden, Colorado. One water sample was taken from the Cash mine portal, one from a site 100 feet below the portal in Cash Gulch, and two from separate locations in Gold Run Gulch. The results of the analysis are shown below; Cash Mine Gold Run Gold Run Element Found Portal Cash Gulch No. 1 No. 2 Copper mg/1 0.1700 0,3800 <0.0100 <0.0100 Zinc mg/1 37.4000 22.4000 0.2200 <10.0000 Lead mg/1 0.2900 0,1000 <0.0100 0.0700 Mercury mg/1 <0.0001 <0.0001 <0.0001 <0.0001 pH 3.8 4,3 7,6 7.8 Solids: dissolved mg/1 1,590 1,070 112 178 suspended mg/1 <10 <10 <10 <10 -7-