WSP11272 - Laserfiche WebLink

Home Browse Search

..... en ~ to $960,000 per rng'L The Palo Verde Irngatlon DistriCt (PVID) Unit special report concludes that about 10 percent 01 the dlstflCt"S canals and lalerals could be lined under the salinity reduction program lor a Iota I construction COSt 01 abOut $17 million About 20 miles 01 canals would be lined In conjunction With onfarm practices. and logether WOUld decrease the salinity allmperial Dam by about 8 mg/L Cost- effectiveness would be $242,000 per mg'L The Dlstnct has ell:pressed an mterest In rehabilitating the remaining 275 miles 01 canals and laterals With those costs being repaid by the DIstrict Salinity benefits realized as a part at system rehabilitation would be credlled 10 the PVIQ repayment reqUirement PVID would repay With mterest. those costs not aSSOciated With salinity reduc- \ton Caples ot the status reports on the Lower Gunnison BaSin Unit. Uinta BaSin Unit. and McElmo Creek Unit are a....allable by writing to the Upper COlorado Regional Director Copies 01 the Palo Verde Ifflgatlon District Unit speCial report are avaIlable by writing to the Lower COloradO Regional Director The Colorado River Water Ouality Olllce has a limited supply 01 all tour reports (Addresses are Shown on last page) Solar Evaporation Test Facility Planned Fi....e Interconnected ponds and a Single control pond will be constructed near Henderson, Ne....ada. thiS summer so Bureau 01 Reclamation engineers can test solar e....aporatlon methods to diS- pose 01 salme water from salinity control prOjects planned for the COloradO RI....er system The Colorado RI....er annually carnes about 10 million tons 01 salts con- tributed by man-made and natural sources Controlling thiS sallloadlng to reduce economiC damage and Improve water qualily IS tne obJecllve 01 the Colorado River BaSin Salinity Control Project A major problem faCing lhe prOject IS disposal 01 the salinE' water alter It has been collected Several methods in- cluding evaporation ponds. are under study Pondlng IS very ellpenSlve but II -:::- ~ ~~ . ~ "~~,,._-, ,~..". F, ,.0;'; the evaporation rate can be malllmlzed, thiS cost would be slgmllcantly reduced Two types 01 pondmg are bemg tested One IS a smgle pond, With no outlet lor the water As the water evaporates. ttie brine concentration Increases, and the evaporation rate decreases E....entually evaporatlon'rom the pond WOUld be Significantly lower The second concepl IS a senes 01 mterconnected ponds 01 succeSSively smaller size The collected brine would Ilow tram the larger pondS to the smaller ponds (through a pumping system nOl depicted In the sketch) Evaporation rates wOuld drop tn the small ponds, but remain high In the larger ones The cumulallve eHect 01 the tnter- connected ponds Should be one of ma"'lmum e....aporation 01 lhe saline water The study proposed by the E\lapora- tlon Research Teamcomprlsed 01 Lower and Upper Colorado Region and E&R Cenler personnel is scheduled to las! 4 years A comparison of evaporatIon rates Irom the two systems Will be made upon conclUSion of the study Water Conservation LOS ANGEL ES-Suzanne 8utlerlleld Chlel 01 the 011 Ice of Water Conserva- tion. reports that the Callfornta Depart- ment of Water Resources IS preparing a gUidebook tor local governments on "Water Conservation at local AgenCies Level" She said that the Department 01 Water Resources would like to hear of any successful local programs, SUCh as publiC education. laws, poliCies. bUilding codes or mitigation measures In envHonmental Impact reports to be Included as mOdels lor other agenCies 10 10110..... II you can prO....lde leads or tnlorma- tlon write Gi'lbe Valenzuela at the SOuthern DISlnct Office, Department of Water Resources, PO Bo)!. 6598. Los Angeles. CA 90055, or telepnone (213) 620-4194 Reservoir Chemistry Study The Bureau 01 Reclamation IS plan- ning to contracl in fiscal year 1982 a two* dimenSional reservOIr model study of Lai<.e Powell and PO!:islbly Lalo.e Mead to ,f' .... .li 01 .... . Improve temperature and salinity modet* Ing capability for reservOirs Two dimenSional reservOir modeling IS necessary to more accurately predict salinity levels throughout Ihe system The major reservOirs tend to selectIVely route lhe high quality spring runofl and trap the cold salme winter base flows WhIch hi'lve grei'ller denSity These large seasonal vanatlons In salinIty and temperature produce denSity currents whiCh result In Significant hOrizontal and ....erlical tOlal dissolved solids variance In the reserVOirs Two*dlmenSlonal reser- vOir modeling together With a com* prehenSlve reser....Olr sampling program Should provide valuable data for more accurately predicting salinity le....els throughout the rlver/reser....Olr system Thls study IS scheduled to last 2 years Newly Lined Canal Section in Grand Valley Receives Water Water for the ittlgallon season was released Into the Government Highline Canal on ThurSday. Apnl2. Openmg 01 the gates Signified completion ollhe concrete lining along 68 miles of the canal The newly Imed reach. developed as a pari 01 Slage One of the Grand Valley Unit received the water by mId- day on Friday, April 3 The lining was perlormed by a private contractor. Peter KieWit Sons' Com- pany, and although oflglnally targeted lor completion In 1983. was Instead finished In fl....e months The seemingly short construction time, whIch elltended trom October 1980 through MarCh 1981. resulted from an accelerated conslruc- tlon program by the contractor Con- structIon was hastened by relatively mild winter weather and by techniques and machinery speCifIcally deSigned by the contractor for use on the prOject The waters progress through the lined section was monitored by 8i11 Klapwyk., manager of the Grand Valley Water Users ASSOCiation, as well as by the contractor s representatl....es and Bureau of Reclamation personnel Includmg prOject construction engmE'er Rudy Angeli Remalfllng Stage One conslfuChon Iflcludes completion of the cross dramage structures, the operation and maintenance road and the flefd stalion.