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all to be completed this summer. as well as development 01 lateral Improvements for which a contract award IS e~pected near the end 01 thIS !Iscal year As a result 01 trash prOblems en- countered dUring mltlal operation olthe newly tined canal Reclamation has been wor..mg with the Grand Valley Water Users AssOCiation to deSign a trash rake and 'raveling water screen faCilities These !acllitles Will assure proper system operation !ollowlng mstallatlon of Ine proposed pipe laleral system Advisory Council and Forum Reports The 1980 Annual Report 01 the Colorado River BaSin Salinity Control Advisory CounCil dated January 1981 has been released The Fourth Annual Progress Repoll dated MarCh 1981 ot the Colorado River BaSin Salmlty Control Forum IS also available !rom Jack A Barnett. E~ecutlve Dlrec10r. Colorado River BaSin Salinity COntrol Forum. 220 S 200 East, Sal1lake City, Utah 84111 Las Vegas Wash A Technical Coordination Group was formed to develop a COOrdinated plan lor salinity control and wastewater manage- mentln Las Vegas Valley The City of Las Vegas. Clark County, Boulder CllY. City 01 North Las Vegas Clly 01 Henderson. Nevada Power, and BaSIC Management Incorporated (BMI) are represented In thiS grouP Price-San Rafael Rivers Unit The proposals lor profeSSional ser- vices to conduct feaSibility in- vestIgations are being reViewed An award 01 contract IS anticIpated m AugUS11981 New USDA Report The Soli Conservation Service (SCSI 01 USDA has released a report on salinity control In the Moapa Valley Subevalua- tlon Un.tln Nevada. part Of the Vlrg,n River Unit The study Identifies alter- native solutions lOr redUCing sail loading 01 the Colorado RIver tlOm IrTlgatlon and other dltluse salt sources The USDA SCience and Education Administration-Agricultural ResearCh (SEA-ARj SaliMy Laboratory In River- Side, Calltornla provided consulting serVices, analyzed water quallty samples and aSSisted 10 interpreting laboralory test results. ASSistance from other Federal and Nevada Slate agen- cies IS acknowledged Clark County Conservation D,stnct onlarm Ifflgahon II1ventones and reports prepared lor Clark Counly Nevada areaWide water management plannmg were used e~ten- slvely SCS Invesl.gatlons on Moapa Indian lands are under a cooperative agreement between the ConservatIOn Dlstnct and the local Trrbal CounCil MUddy Rl\Ier. which !lows through the Moapa Valley, COntrloutes an average 01 73.400 tons of salt and 385,000 tons 01 sediment to Lake Mead each year An annual reduction 01 19.500 tons of salt could be accomplished by (1) Im- proving the Irrigation dehvery system to reduce canal seepage (1,835 tons). (2) Improving onlarm Irrigation water management and decleaslng deep per- colallOn (17,39510nsl. and (3) reducmg erOSIon by shapmg and seeding Channel banks With protectIve measules at road crossmgs (270 tons) Installation a! the erOSIOn contrOl measures IS esllmated to reduce the annual sediment Yield by 5,000 tons ErOSion control Improvements are estimated to cost $112,100 Operation and maintenance cost IS estimated to be $3,000 annually The total cost for the recommended plan. mcludlng $506,800 lor technical aSSistance. IS $6.300,000 Total prograll' cost With operall0n. malnlenance, and replacement added 10 IS $883,500 an- nually ....I!h a reSultant cost- ellectlveness of about S~40.000 per mg'L reduction al Impenal Dam An environmental evalua\lon ShOwS that the proposed salmlty control " . measures Will ha'Je no adverse e'fectson resource users Overall Improvement In some resource conditions will occur when me recommended plan,s Im- plemented Irrigation water delivered 10 the Overton Wlldllle Refuge near Lak.e Mead will be at better quality The Improved low 110w '....'ater quality and the vegetatIOn to be established to control erOSion Will enhance wlldllle habitat PhYSical land treatment 01 langeland rn Moapa Valley IS nOt considered In thiS plan, and there is no torestland Unique cultural. historical archeological. or nalural resources Will not be disturbed by me ImplementatIOn 01 propOSed measures AbDul 32 acres of rlparlal"! weIland habitat will be converted to upland wild Ide habitat which represents aboul 0 5 percent of the total wetland area In the Subevaluatlon Unit USDA recommends that ongOing USDA conservation programs be accelerated to accomplish needed Im- provements Monitoring ollrrtgatlon water management and related resources allected by the Improvements will be Initiated and e~panded to assess Impacts 01 proposed salinity control measures Copies 01 the report entitled. Sahnl1y ContrOl and Environmental Assessment. Moapa Valley Subevaluatlon Unit. Nevada Colorado River BaSin Sallnlly ContrOl Program. are available by wntmg to Gerald C Thola Slate Conser- vationist 5011 Conservation Service. P 0 Bo~ 4850 Reno, Nevada 89505 Big Sandy River Unit A COntracl award lor feaSibility mveshgatlons on the Big Sandy River Unit Will be made soon Final negotiations With prospective conHac- 10rS were conducted the week of May 18 The pUblic inVOlvement program on Big Sandy IS underway Meeker Dome Unit The contractor has allempled to re- enter the Marland Well unsuccess1ully and has drilled a parallel hole 10 allempt Pluggmg at depth MonllOrmg IS un- derway to determme IheeHecllveness of pluggmg the James. Scell. and Marland Wells as a salinily controltechn!que