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Show The bulk of the water supply developed through the diking of Utah Lake would be transferred by exchange to the proposed Jordanelle Reservoir, mainly for municipal and industrial use in Utah and Salt Lake Counties. This would be accomplished by withholding the high flood flow and part of the winter flow of the Provo River in Jordanelle and Deer Creek Reservoirs and replacing it with Bonneville Unit water in Utah Lake. In the interim, before the Goshen Bay Dike is completed, part of the irrigation releases scheduled for the southern areas of the Bonneville Unit would be delivered to Utah Lake to accomplish the replacement for exchange. An additional low- quality industrial supply which is not part of the 313,000 acre- feet of Bonneville Unit water discussed above would be developed by the Lampton Reservoir on the Jordan River. Water supply operation studies prepared by the Bureau of Reclamation show that a 45,000- acre- foot active capacity reservoir could regulate Bonneville Unit return flows and firm up an additional supply of 172,000 acre- feet of low- quality water for use on the lower Jordan River System. c. Changes in the Plan Since Publication of the Definite Plan Report The Definite Plan Report^ dated August 14, 1964, is the basis for appropriation of funds and the construction of the Bonneville Unit. Since that time, several changes have been made in the plan as a result of additional study and through cooperative planning with State and Federal agencies,, All of the changes were designed to improve the Bonneville Unit, and some would definitely reduce adverse environmental impacts. The changes are described in the following paragraphs to show the relationship of the plan described herein to that of the Definite Plan Report. These changes have all been included in the official plan, except for the addition of Lampton Reservoir, which is pending. ( 1) Supplemental irrigation service would be extended to the Sevier River Basin in lieu of service to a portion of the full- service irrigation lands in the Mona- Nephi and Mosida- Elberta areas. In April 1957, the Utah Water and Power Board ( presently the Utah State Division of Water Resources) passed a resolution recommending that this change in allocation of irrigation water be effected. This resolution is in harmony with the Division's objectives as stated in the State Water Plan. 19 Detailed study of this proposal indicated that the change was economically justified. This change would reduce the full- service area of the Bonneville Unit from 43,740 acres to 32,900 acres, eliminate 13 |