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Esbibit IV 7 shows the reliever system and capacity utilization for each airport in Alternative 4. 1. System Diversion Even with the addition of a parallel nmway and increased capacity, Anoka County-Blaine would have to divert 43 based aircraft before annual operations are lowered to 80 percent of increased operational capacity. St. Paul Downtown and Flying Cloud airports are projected to surpass 80 percent of their available operational capaaty by the end of the planning period. These two airports must divert 55 and nine aircraft, respectively, to obtain an 80 percent ratio between demand and capacity. An estimated 26 based aircraft can be diverted from Anoka Counry- Blaine to Crystal Airport. Fifty-five single-and lighttwin-engine aircraft could be diverted from St. Paul Downtown to Lake Elmo. This diversion would occur only if the users of the overburdened airport perceive the delay as an actual problem and view the neighboring airport as a suitable option for basing their aircraft. Diversion from Flying Cloud is not expected to occur, because an airport with additional capaaty is not located in close proximity. • 2. Operational Demand With an increased ASV of 355,000 and 297,000 projected annual operations (after possible diversion) by the end of the planning period, Anoka County-Blaine will approach 84 percent of its operational capacity by the end of the planning period. The relationship between demand and capacity at each of the other reliever airports is shown in Table N-7. An increase in available capacity at Anoka County-Blaine duectly relates to an increase in the entire reliever system's capacity. Therefore, with the number of projected operations remaining constant, the overall demand for available operating capacity is reduced to 69 percent in Alternative 4. The projected number of annual operations as a percentage of ASV for Alternative 4 is presented in Table IV-7. • N-28