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Currently, Gateway North Industrial Airport has 30 based aircraft. Estimates <br />derived from the airport's master plan indicate that 55 based aircraft can be expected <br />at Gateway North by the end of the planning period. If extended as outlined in its <br />master plan, this airport would have a land envelope large enough to accommodate <br />160 based aircraft. <br />Alternative 5 assumes that diversion will occur between airports where <br />possible; diversion assumptions for Alternative 5 aze described is a following section. <br />Alternative 5 does not provide for capaaty enhancements to existing relievers. A <br />runway extension at Lake Elmo is recommended to help divert single-and light twin- <br />engine aircraft from St. Paul Downtown. <br />Fshrbit ]N-8 depicts the reliever system and operational capacities for both <br />the system and individual relievers in Alternative 5. <br />1. System Diversion <br />An estimated 105 based aircraft wind be diverted from Anoka County- <br />Blaine to Gateway North Industrial Airport, which would maximize Gateway <br />North's aircraft storage potential As in all the diversion scenarios, 55 single- <br />and light twin-engine aircraft would be diverted from St. Paul Downtown to <br />Lake Elmo. Improvements (namely a runway extension) will be required at <br />Lake Ehno to help realize this diversion. <br />2. Operational Demand <br />For Anoka County-Blaine Airport to reach an operational level equal <br />to 80 percent of ASV, a total of 191 based aircraft would need to be diverted. <br />Gateway North Industrial, with improved facilities, can acwmmodate 105 of <br />these 191 aircraft. An estimated 71,000 annual operations would be <br />transferred from Anoka County-Blaine Airport to Gateway North Industrial <br />with diversion of these 105 based aircraft. Even with this diversion, Anoka <br />Cotmty-Blaine would still be operating at 105 percent of its annual capacity <br />by the end of the planning period. Gateway North Industrial, with an <br />estimated ASV of 200,000 operations, would be operating at approximately <br />55 percent of its annual capacity by the end of the planning period, assuming <br />it realizes growth as projected in its master plan and accommodates diverted <br />demand from Anoka County-Blaine Airport. <br />IV-32 <br />