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<br />J <br />J <br />J <br />J <br />J <br />J <br />J <br />J <br />J <br />J <br />J <br />I <br />J <br />J <br />J <br />I <br />I <br />I <br />I <br /> <br />3745 <br /> <br />wells in the vicinity have been plugged by the BuRec. Data <br /> <br />collection studies indicate that seepage is continuing and the <br /> <br />salt loading estimate for 1979 approximated 27,000 tons. <br /> <br />BLM - Ground Water Contribution <br /> <br />The White River Basin at Watson, Utah yielded an average <br /> <br />annual salt load of 275,000 tons from 1966-75. Of that total, <br /> <br />approximately 196,000 tons, or 71% of the total basin salt <br /> <br />yield, was attributed to ground water sources. <br /> <br />Summary <br /> <br />Both the EPA and USGS reports account for the entire <br />White River salt yields contributed by lands within Colorado. <br />Assuming there have been no significant changes in basin <br />conditions since these investigations were conducted, no real <br />gap in salt loading information exists. Conflicts in <br />information, however, do exist. <br /> <br />USGS <br /> <br />Man Caused <br />Natural <br /> <br />50% <br />50% <br /> <br />20% <br />80% <br /> <br />EPA <br /> <br />Man Caused <br />Natural <br /> <br />The most obvious conflict involves the portion of total salt <br />yield each report attributes to man caused sources of salinity. <br />The USGS suggested that irrigated agriculture in the basin adds <br />about 163,500 tons annually (50% of the total yield) while the <br />EPA report attributes about 7,300 tons annually (2% of the total <br /> <br />-13- <br />