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<br />B. Considering A flow Sf 8 ft3/sec, the flow of salt in tons/year can <br />be calculated. Also 7.9 ft /sec of makup water is necessary, assume this <br />makup water has the same quality as "above La Verkin Spring". These two <br />components must be sunnned to form "La Verkin Springs Desalting Plant <br />Product Water and Replacement" shown on tables 7 and 9. The calculation <br />discussed above is displayed in table 10. <br /> <br />The sums, shown on table la, are entered into table 7 where <br />entitled "La Verkin Springs Desalting Plant Product I-Iater and Replacement". <br />Calculations, on table 7, proceed downstream, using An unmodified <br />Littlefield Springs inflow. The result is a 5.4 mg/L reduction at Imperial <br />Dam for the life of the project if the infiltration near Bloomington, Utah <br />is not the source of the Littlefield Springs flow. <br /> <br />If the infiltrationnear Bloomington, Utah is the source of <br />Littlefield Springs flow, the affect of this project on the quality of the <br />Littlefield Springs flow must be estimated. This is done by adding to the <br />infiltration near Bloomington, Utah the underground salt pickup. This <br />calculationis displaved on table 8. <br /> <br />The values from Table 8 labeled "Estimate of the Duality of <br />Littlefield Springs flow after 22 + years" is entered for Littlefield <br />Springs on Table 9. The flows (salt loading) are summed and a new value <br />for salt loading at the Virgin River at Littlefield is the result. This <br />value is compared with the corresponding value from Table 2 and the <br />difference extrapolated to a salinity reduction at Imperial Dam using the <br />future effect equation. <br /> <br />C. The conclusion reached from these calculations is; given the <br />desalti~g plant alternative from the previous inve3tigation operat~ng on <br />10.9 ft /cec of La Verkin Springs instead of 12 ft /sec and 2.9 ft /sec of <br />water from Quail Creek Reservoir, the salinitv reduction at IMperial Dam <br />would be 5.4 mg/L. <br /> <br />If the infiltration near Bloomington, Utah is the source of <br />Littlefield Springs, this salinity reduction at Imperial Dam would increase <br />to 8.7 mg/L after 22 + years of operation. <br /> <br />11 <br /> <br />~6t)c::. <br />OO".....J <br />