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o OJ C) o During FY -98, an estimated 10-15 tons per year in salt savings was achieved in Nevada, primarily through grazing restrictions, vegetative management activities and burro removals. 1 J In the Las Vegas District, one detention basin was completed in FY -98 bringing to 21 the total that have been completed to date under the 1991 Clark County Flood Control Master Plan. Although the primary objective of these facilities is to minimize the loss of life and property, there is also an undetermined reduction in dissolved solids entering the Las Vegas Wash and Lake Mead. i . . -j The Appropriate Management Level established in FY-95 for wild burros has been achieved for the Gold I1utte Herd Management Area. Burro removals have been conducted in cooperation with the BLM Yuma District. Arizona the past few years. Some reduction in salt loading to Lake Mead is anticipated. '1 .'k 'f 'f Within the Las Vegas District 17 grazing allotments. on 141,000 acres of highly saline soils tributary tb the Colorado, are affected by the Desert Tortoise Biological Opinions of 1991 and 1994. During FY-98, grazing restrictions consistent with the Biological Opinions remained in place. ,,'1 " " , In FY-95, .the grazing preference on the Wilson Creek Allotment was reduced. Livestock is run at 80 percent of the former level. The prescription remained in place during FY -98 and will be reevaluate\! in FY -99. i ;1 l ~ 4 .:-a: ,! As a continuation of a FY -97 tamarisk removal project, tamarisk resprouts were treated with herbicide Gn 6 acres in Hiko Wash, located approximately 6 miles above the Colorado River. The Virgiq River Tamarisk Work Group, established in FY-97 to control of tamarisk along the Virgin River, is preparing an environmental assessment for the removal of tamarisk and the restoration of native habitat on a 160 acre pilot project. ..;i, I 1 t ~ , In June 19"98. a 330 acre wildfire occurred in the tamarisk along the Virgin River.. A River Fire Rehabilita\ion Plan has been prepared and approved and reestablishment of native habitat has begun. The removal of tamarisk and the reestablishment of native habitat will result in reduction of salt loading to Lake Mead. ;'\ :1 -~ '" New Mexico J >'~ Farmingtoq is the principal New Mexico Field Office with activities that impact the Colorado River drainage. Salinity reduction measures taken by that office in FY -98 resulted in an estimated reduction in salinity of 38-40 tons per year for New Mexico BLM. Three watershed/riparian projects were undertaken in FY-98. In the first, 75 indigenous cottonwood poles were planted on 3 acres of Pioche Canyon, a tributary of the Largo Canyon watershed; To protect the trees from damage from wildlife and/or livestock disturbances, individual fencing was placed around each tree. -~i , oJ 15 , i j .1 <~ , > :i ..~I ~ n.., :',i";_,,:' ;.i;'" Jti,li '--".-.,