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3. System Delay By the end of the planning period, total reliever system delay for Alternative 4 is estimated at 1S million minutes annually. The total system delay translates to approximately 1.0 minute of average delay for each aircraft operation. Average delay per aircraft at Anoka County-Blaine is reduced to 12 minutes per operation (see Table IV-7). Crystal Airport, after accepting diversion from Aaoka County-Blaine, is expected to experience 1.2 minutes of average delay per operation. 4. Preliminary System Cost The cost of building a parallel runway (17R/35L) and taxiway at Anoka County-Blaine Airport was estimated at 51,730,000 in the airport's 1983 master plan.' In 1989 dollars (assuming a 6 percent annual inflation rate), a pazallel rumvay and taxiway aze estimated to cost 52,454,000. Construction costs for an FAA tower at Anoka County-Blaine are estimated at 51,000,000 (not including annual operating costs). Inflated master plan estimates (1989 dollars) fora 1,000-foot long runway and taxiway extension at Lake Elmo are 5691,000. Total costs for Alternative 4 are estimated at 54,145,000. (5) Gateway North Industrial Airport is currently a privately owned facility. Alternative 5 assumes that this airport could secure public sponsorship and be included in the reliever system. The current land envelope associated with Gateway North is considerably smaller than that rewmmended in the airport's master plan°. Alternative 5 assumes that the pazcels identified in the Gateway North Industrial master plan could be obtained to expand the airport to permit the primary runway to be paved and extended to a length of 3,300 feet. This expansion would require the purchase of several homes and small businesses. The 1985 master plan estimated that the purchase of 227 acres would be required to accommodate runway extension. s Anoka County-Blaine Master Plan, 1983, TRA. °Gateway North Industrial Airport Master Plan, October 1985, Hakanson Anderson . Associates, Inc. N-31