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2. upr 7RVER SYSTEM AI.,'I`ERNA'1'IVFt As mentioned, eight alternatives were developed to resolve existing and future deficiencies in the reliever airport system. These alternatives are a combination of various capacity-enhancement strategies, including improving capacity at existing airports, adding new or existing airports to the reliever system, and infra-system diversion. The need to resolve operational capacity shortfalls was the primary factor considered in the formulation of system alternatives. As dis~vssed in Chapter III, each of the reliever airports appears to have existing on-airport property available to accommodate projected based aircraft levels. The operational capacity of the reliever system can be increased by: Increasing the available capacity at existing reliever airports Diverting system aircraft to underutilized facilities . Constructing new reliever airports Bringing existing nonreliever airports into the system These options were incorporated into the development alternatives identified for the existing reliever system. (1) Alternarive 1- Minimum Development Alternative 1, a minimum development scenario, was used as a base case to which all other alternatives were rnmpared. In this alternative, the only improvement to the reliever system is increasing airport storage capaaty as demand warrants. It is assumed that each reliever airport will be able to develop aircraft storage and parking to accommodate projected demand. As mentioned previously, each airport in the reliever system has an adequate land envelope to potentially accommodate its projected number of based aircraft. This conclusion is based on estimates of developable storage derived from the 1987 "Evaluation of Aircraft Storage Capacity" report prepared by MAC and data provided by airport management. Alternative 1 does not provide for improvements to the existing system's operational capacity nor N-16