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<br />,. <br /> <br />Paradox Va*ey <br /> <br />Paradox Valley, loj,ated in eouth- <br />western Colorado, w~ formed from <br />a collapaed salt dom~ The valley <br />lies above a residual maum cap <br />that covera a fonnati~n of salt and <br />i\:) salt.rich shale that ~gins at a <br />c,.;, depth of about 600 tol 1,000 feet and <br />CD extends downward fot about <br />l~ 14,000 feet, <br /> <br />The Dolores River a>ic~s up <br />apprQXimately 205,Oop tons of salt <br />annually aa it crosses\PlU'adox <br />Valley, primarily fro~ the surfacing <br />of brine ground wate~. The deep. <br />well injection plan is ~eaigned to <br />prevent approximately 90 percent <br />ofJ;he natural brine i4flow <br />(180,000 tons annuallf) from <br /> <br />Editor: Petty J. Glllesp!e <br />Salinity Update Is p~bllshed four times <br />per year by the Cotoraqo RIVer Salinity <br />Program Coordinator, 'ure~u of <br />Reclamstlon, Oepartm4nt of the interior. <br /> <br />"..,. United Stetes <br />Department of the Intj.rior <br />Bureau of ReclamatioQ, D.5090 <br />P,O. Box 25007 , <br />Denver, CO 80225-00p7 <br />: <br /> <br />OFFICIAL BUSINESS' <br /> <br />entering the Colorado Rivsr system, <br />The saline ground water (brine of <br />260,000 mgIL TDS) will be pumped <br />from shallow collection wells <br />acijacent to the Dolores River, thus <br />preventing it from surfacing in the. <br />riverbed. <br /> <br />Oeep-well injection was selected <br />as a test method of disposal for the <br />collected brine because it was <br />technically sound and environmen- <br />tally and economically preferable to <br />the original disposal method of <br />evaporation. <br /> <br />Construction of the test injection <br />well and associated facilities is <br />complete. Preliminary testing will <br />begin in the fall of 1990 and a <br />2-year injection testing program will <br /> <br />Questions concerning the program or <br />specific projects should be addressed to: <br />Stan Gappa, 0-5090 <br />Bureau of Reclamation <br />P.O. Box 25007 <br />Denver, CO 80225 <br /> <br />begin in tl)e spring of 1991. 'Results <br />from the.2.year testwil1enliPle a <br />final evaluation of brine disJl,08al'by <br />injection vereus evaporation/ <br /> <br /> <br />. USDA McE:lmo <br />Creek' project <br /> <br />First-year funding for USj)A <br />salinity 'control contracts was <br />allocated.to the Mc)!Jlmo Creek <br />project in 1990. In the Ilrst,pgn.'lP <br />. period, 124 applications were <br />received. At least seVen contrl\cts <br />have been signed to date, and <br />salinity practices ai'e being installsd <br />by the participants. <br /> <br /> <br />Telephone: FTS n6-6782 <br />Commercial: (303) 236-6782 <br />When writing to request address . <br />changes or deletions, please incluae a <br />recent address label. Contributions to' the <br />newsletter are enCouraged. <br /> <br />,~ . <br /> <br /> <br />'", ~ ~-o"y <br /> <br />-".", <br /> <br />