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Or. Kent Butler October 21, 1985 Page 5 existing or planned roadways where possible. Where no roadways have yet been planned, the locations should be considered as approximate, with the recognition that there is great flexibility in the location of lines in a pressurized system. The lines are sized to keep velocities below 5.0 feet per second duri ng maximum flow conditions. However, a number of lines are sized somewhat 1 arger either to maintain acceptable pressures or to provi de alternate flow paths to allow continued service in the event that a line has to be temporarily removed from service. To make such alternate paths available, lines should be "looped", with connections to other main lines at both ends, wherever practical. It should be noted that the system is heavily dependent upon the 30/24/20-inch line between the 3.0 MG tank west of Post Road and I.H. 35, especi ally in the early phases of development. The cost of providing an adequate additional flow route is probably prohibitive, but would increase the sy stem rel i abil i ty. Consideration should be given to an early connection of the proposed system to the City system. There are two lines shown which cross I.H. 35. The sizes shown represent the sizes which would be recommended for lines in ordinary locations. However, since highway crossings usually require expensive "jack-and-bore" construction, it is generally desirable to make such crossings larger than would otherwise be required, to avoid the necessity of building parallel crossings nearby in the future. Consideration should be given to oversizing these proposed crossings to minimize long-term costs. COST ALLOCATION State pol i ci es and regulations pertaining to the creation of MUDs imply that the cost of constructing new facilities be shared proportionately by the MUDs and other entities involved on the basis of use. The following discussion outlines a proposed methodology for the allocation of costs. The actual allocation equations are presented in Appendix A. A. Supply Facilities The well sand associated transmission 1 i nes benefit all users equally, regardless of pressure plane. It is also practical to add wells incrementally, allowing the use of a relatively short design period. For these reasons, it is suggested that the well and associated transmission line costs be allocated on the basis of the projected LUEs for each entity in each design period, independent of location. B. Storage The cost allocation for storage facilities was examined individually for each faci 1 ity. Every effort has been made to make the allocation as fair as possible, with consideration given to both short-term and long-term needs.