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<br />. <br /> <br />. <br /> <br />. <br /> <br />DRAFT <br /> <br />of stream pollution, from feedlots, irrigation return flows, fertilizers, <br /> <br />chemicals, etc. Nitrate pollution of groundwaters has been found in the <br /> <br />South Platte Basin. <br /> <br />o <br />Many mountain properties have been built on the basis of the owner <br /> <br />providing his own waste-disposal system. Due to lack of adequate soil. <br /> <br />mantle, much property is located on fractured granite. This formation <br /> <br />affords good percolation rate of septic-tank effluent, but it quite often <br /> <br />provides direct contact to nearby wells. <br /> <br />Mine waste has been a long-time problem in Colorado, and mine wastes <br /> <br />are generally highly acidic. . In August, 1971, the U. S. Geological <br /> <br />Su~vey initiated a study of the mine-waste problem in the state. Com- <br /> <br />pletion of this study will permit a better definition of the extent of <br /> <br />the problem and the control measures needed. <br /> <br />. Outdoor recreation in Colorado covers a wide range of activities. <br /> <br />Primary waste management problems associated with outdoor recreation in <br /> <br />the state are concerned with camping, snow skiing, boating, and resort <br /> <br />communities. The concentration of recreational activities in small areas <br /> <br />during short periods of time makes wastes from the aforementioned <br /> <br />activities particularly significant. Disposal of wastes from recreational <br /> <br />areas becomes increasingly important because of the rapid growth in <br /> <br />recreational use and development. The problem is further compounded <br /> <br />.because a high level of waste treatment will usually be required if <br /> <br />the high .quality of the water found in recreational areas is to be <br /> <br />preserved. <br /> <br />.... <br />II:) <br />C\I <br />'C) <br /> <br />Three major sources contribute the bulk of the total salinity <br /> <br />concentrations to the state's streams. <br /> <br />(1) The contributions resulting from applied quantities of water <br /> <br />during irrigation of cropland. <br /> <br />~--~ - --- - ---- <br /> <br />-19- <br />