Laserfiche WebLink
<br />w <br />W <br />': ~. <br />c.. <br /> <br />overincised channels to aggrade, and if conditions are adequate. result in the creation or <br />restoration of streamside riparian zones. <br /> <br />Reservoirs are as efficient in controlling salinity as mey are in trapping runoff and sediment <br />and should be impermeable to avoid leaking salt through the subsurface. While a retention <br />Structure will cease to function for salinity control after it is filled with sediments in ex.cess <br />of its design capacity, a proper spillway will keep the structure from failing and becoming a <br />future source of salt and sediment. l\.1aintenance of retention stnlctures-either by <br />excavating stored sediments or by increasing structure height-will allow the structures to <br />function beyond their original design life. <br /> <br />In strongly saline areas, retention structures may be the only practical management <br />alternative. However, structure maintenance problems in saline sites are often severe. The <br />feasibility of constructing these types of structures depends upon identifying secondary <br />benefits such as flood control, water supply, and wildlife habitat In less saline areas, <br />onsite benefits to water supply, vegetation production, and riparian enhancement often will <br />be greater than in highly saline areas, but mechanical treatments and vegetation management <br />also may be more feasible treatment strategies, depending upon the management objectives. <br /> <br /> <br />Elephant Skin Wash salinic)" concrol \'erification project near Montrose, Colorado. <br /> <br />Energy and Minerals Management <br /> <br />The Bureau of Land Management administers the leasing of all Federally owned mineral <br />resources. Coal, oil. gas. and oil shale development in the Colorado River basin can <br />contribute salt to the Colorado River. Fossil fuel resources are located in marine--derived <br />formations that are high in soluble salts. Salinity can be increased by the dissolution of <br />minerals, or by consumption of good quality water during extraction of the resource. Any <br />disturbance of saline formations will allO\\/ additional soluble minerals to enter the basin's <br />v,'ater systems. <br /> <br />13 <br />