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percent of capacity between 1993 and 1998, while Crystal will pass this mark between 1998 and 2003. By the end of the planning period, these two airports will reach 79 and 74 percent of their respective capaaties. St. Paul Downtown will reach 60 percent of available capacity by 1993, and is expected to surpass 80 percent of its capacity by the yeaz 2003. By the end of the planning period, approximately 93 percent of St. Paul Downtown's available capaaty will be utilized. Under the base case scenario, only three of the seven relievers will remain below 60 percent of ASV by the end of the planning period. Airlake is only expected to reach 39.8 percent of its capacity, operational demand at Lake Elmo will reach 46.6 percent of its capacity, and South St. Paul will reach 29 percent of its capaaty. The base case scenario indicates that airfield capacity will be a critical issue for Anoka County-Blaine and St Paul Downtown airports during the planning period. At Crystal and Flying Cloud, planning should begin in the next five to 10 years to explore ways to improve airfield capacity. As a whole, the reliever system is currently operating at an estimated 46 percent of capaaty. As system operations increase, the system will reach 60 percent of its capacity between 1998 and 2003. By the end of the planning period, demand will approach 73 percent of available capacity. These projected saturation levels indicate that alternatives to enhance the reliever system's operational capacity will be needed. (3) Ia addition to the operational capacity analysis, an airfield capacity analysis was undertaken to analyze the additional impact on the reliever system resulting from diverted general aviation operations from Minneapolis-St. Paul International. Results from the registered aircraft owners survey conducted for the Regional System Reliever Airports Study indicate that approximately 10,000 operations from locally based aircraft could potentially be diverted to the reliever system. This diversion will result from based aircraft that will be transferred from Minneapolis-St. Paul III-6