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or turbojet operations. Flying Cloud has approximately 2 percent turboprop and turbojet operations, and St Paul Downtown has approximately 17 percent turboprop and turbojet operations. All of the reliever airports aze projected to have operating fleets containing less than 20 percent Class C aircraft. This indicates that wake and approach speed differences will not be a significant factor at any of the reliever airports. For general planning purposes, when the fleet mix index reaches 20 percent, the ASV decreases. Only one of the relievers, St. Paul Downtown, has an operating fleet containing more than 3 percent Class C aircraft. St. Paul Downtown's operating fleet contains an estimated 17 percent Class C aircraft, which will have only a minimal effect oa its capactty. Therefore,-all seven of the relievers have a homogenous fleet mi7r, which minimi~.c delay at each airport. (2) F*icti g Oneran~ apaci -Base Cate Estimates of the ASV for each of the reliever system airports aze presented is Table III 1. As shown, Airlake, Anoka County-Blaine, Lake Elmo, and South St. Paul airports have estimated ASVs of 230,000 operations. Although Anoka County- Blaine and Lake Elmo airports both have crosswind runways, crosswind runways typically have minimal impact on enhancing capactty for airports with homogenous operating fleets of aircraft under 12,500 pounds. St. Paul Downtown's ASV is estimated at 260,000 annual operations. This airport's three-rumvay configuration is such that simultaneous departures can occur from Runway 14 and Runway 12 during certain wind conditions, which provides a higher capacity than asingle-runway or intersecting crosswind configuration Crystal and Flying Cloud airports, with their parallel tumvays, have estimated ASVs of 355,000 operations, the highest among the seven reliever airports. While the runway separations are not great enough to allow simultaneous arrivals or departures, parallel nmways can increase the ASV through more efficient staging of arrivals and departures. One reliever airport, Anoka County-Blaine, is currently operating at 87 percent of its capacity. Under base case projections, this airport will be operating at more than 136 percent of capacity by the end of the planning period. Three other airports, Crystal, Flying Cloud, and St. Paul Downtown, are projected to surpass the 60 percent benchmark during the planning period. Flying Cloud will reach 60 III-4