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<br /> <br />PQIQdOH volle <br /> <br />~ SALINITY CONTROL PROJECI~~'-;8 1984 ~ <br />J une 198~LcOLORAI??O~l\ri~~RD <br />co",,,"r'l\l!l;i',, ' <br />, .~v;,...':'\~' .. <br /> <br /> <br />~,}Cv1Ji" eJj <br />c"y~( <br /> <br />OrY- During the past 2 years we have continued to <br />investigate the feasibility of deep well injection as a <br />means of disposing of the saline water that enters <br />the Dolores River in Paradox Valley, Our studies <br />have indicated that it is still a better alternative than <br />evaporation ponds, which were recommended <br />several years ago before advanced planning studies <br />had begun. <br />The next step is to drill a deep test well to <br />determine specific design requirements and the <br />proper number of final project wells and their <br />location, <br />This spring, geophysicists hired by Reclamation <br />are analyzing seismic test results to find alternative <br />test well locations, The use of an existing petroleum <br />well was considered but rejected because It was not <br />straight and contained metal debris, Potential well <br />sites are located within the valley near the <br />Dolores River and within the river can- <br />yon for about 5 miles upstream. <br />We anticipate the awarding <br />of a contract to design the <br />well by this fall and another <br />contract to drill the well by <br />next fall. The well will probably <br />have to be drilled to a depth of <br />between 12,000 and 15,000 <br />feet where a limestone forma- <br />tion is located that can acco' <br />modate the briny water, <br /> <br />IJO 874 <br /> <br /> <br />After the well is drilled, the hydraulic charac, <br />teristics of the limestone disposal formation will be <br />determined along with the compatibility of the <br />formation for the waste brine. These results will <br />guide us in designing the final project facilities, <br />which will probably include the following: buried <br />pipelines, an injection pumping plant. a brine treat, <br />ment plant, access roads and power lines, <br />Environmental impacts associated with deep <br />well injection appear to be minimal, but an environ, <br />mental assessment will be prepared and made <br />available for public review after the test well results <br />are in, The decision on whether or not to use deep <br />well injection as a permanent brine disposal <br />technique will be made after the well testing, <br /> <br />-=~ .--- --- -- <br /> <br />"\.''':~ <br /> <br />Bedr-ock Store <br />