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<br />') <br /> <br />this is a 539-square mile z.irS~.l ma;)ped as h'~'.J:r;9 G sed;rnenl yiel'd g:--ea:::er <br />than 0.5 acre-foot per square rrd ie per yedr. Structu!>al treatment <br />measures such as debris basins, streamban~ protection, grade control, <br />etc" will provide sediment reduction. Over time, :he most effective <br />treatment measures may be improved vegetation and iess disturbance of <br />the soil surface. Such measures i:lclude pr'uper grazing use, range seeding, <br />1 ivestock exclusion, tree planting, 'doodland improvement, etc. A combina- <br />tion of structural and vegetation improvement measures may be necessary in <br />some areas, <br /> <br />The specific potential for reducing the annual seciitnent yield of 1,086.5 <br />acre-feet, including a portion of the 408,000 tons (.f 50il loss annu:;"! 1., <br />from streambank erosion, and the 592,000 tons of total dissolved sol ids <br />from watershed areas of the lower Gunn i son Un i t is ',ot kno.", , <br /> <br />003058 <br />