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<br />Appendix A <br />Spanish Fork Canyon-Nephi Irrigation System <br />Municipal and Industrial Water System <br />Representative Area Template <br /> <br />A.1.0 Introduction <br /> <br />This methodology was developed to estimate potential economic and environmental impacts that could occur as <br />a result of the construction and operation of municipal and industrial (M&I) water systems. Assuming that the <br />SFN System is constructed, it is anticipated that 10 communities within southern Utah County would improve their <br />existing water supply infrastructure enabling them to use 11,200 acre.feet of Bonneville Unit water, conveyed in <br />the SFN System, as a source for secondmy water systems. Secondary water systems provide non-potable water <br />to commercial and private residences for the purpose of watering lawns, cooling machinery and other activities <br />where using treated water suitable for human consumption is not necessmy. The 10 communities eligible to <br />receive M&I water in southern Utah County include Map1eton, Springville, Elk Ridge, Woodland Hills, Payson, <br />Salem, Santaquin, Spanish Fork, Goshen, and Genola. At this time, the Central Utah Water Conservancy District <br />(CUWCD) is unable to determine which specific communities would upgrade their water delivery systems to <br />receive Bonneville Unit water. Therefore, two communities were selected for use as "representative areas" in order <br />to conduct an impact analysis. <br /> <br />The two communities selected to develop this methodology are the cities of Mapleton and Payson. Currently, the <br />city of Map1eton does not have a secondary water system. It was selected to represent communities that are more <br />rural in character (i.e., more agricultural lands or fallow property, less pavement. less traffic, and less industry <br />within the city limit). The city of Payson has an existing secondary water system and was selected to represent <br />the more urbanized communities (Le., more developed or previously disturbed land, more residences and <br />commercial development etc.) in the area. Map D-1 shows the locations of these and the eight other southern Utah <br />County communities eligible to receive M&I water. <br /> <br />A.2.0 Assumptions <br /> <br />. All 10 communities eligible to receive M&I water would receive a portion of the allocated 11,200 acre- <br />feet of M&I water and would construct a secondmy water system. Table A-I shows estimates for water <br />allocation, worker days and costs associated with constructing a M&I system in each of the ten <br />communities. <br /> <br />. Secondary water systems would be built in existing developed areas (Le., residential/commercial areas); <br />secondary water systems would not be constructed in undeveloped agricultural areas. <br /> <br />. Communities eligible to receive M&I water would be responsible for complying with health and safety <br />requirements associated with delivering non-potable water to homes and industry. <br /> <br />. The Mapleton representative area characterizes communities in which a secondary water system would <br />be constructed within existing open. unlined ditches located adjacent to existing streets and propeny lines.. <br /> <br />A-I <br />