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r- ..... <.0 <: c::. c ;'.:: -6- Recharge C6ntrol alternative consists of diverting the recharge water around a key recharge point in Dotsero Crater and allowing it to flow into the Colorado River system. In this way, a small percentage of the saline \.,rater would be prevented from becoming sal ine. The effects on the water rights system are negligible. There are no rights on the streamflow path between the proposed recharge point and the outflow of the Dotsero springs. If the theory of recharge is correct, the Dotsero springs will produce a certain percentage less volume when the recharge control ~s in operation. Because none of these springs are appropriated, the change in flow will not affect any present owners. The discharge point for the present flow will be moved upstream from the spring location to Dotsero Crater, passing no existing rights on the way. The planned diversions of salt water at Glenwood Springs will be increased to compensate for the decreased effect of using the recharge control method at Dotsero instead of alluvial wells. The collection of the springs at the mouth will continue and alluvial wells will be added to the system. Here problems may develop as the withdrawal by the wells might affect the spring flow which will be supplying the e~isting spring owners at Glenwood Spri ngs. Whether, and to what extent the divers ion by well s affects the spring flow has not and cannot be physically determined without more information. If it does appear to affect the spring flO\.,r, negotiations will be required with the spring owners to provide satisfactory (in quantity, temperature and quality) replacement water. The fact that this "satisfactory" replacement water may not be available is important and its absence could impair the f easibi 11 ty of thi s al ternati ve. The water collected at Glenwood would be piped to the New Castle site, desalinized by reverse osmosis, the brines (estimated at 25% of the input volume) would be deep well injected and the treated water returned to the river (Figure 4). C\) Leonard Rice Consulting Water Engineers. Inc.