b'MAC RELIEVER AIRPORTSThe MACs six general aviation reliever airports are open for publicbased aircraft. The operations totals are obtained from the FAA for use 24 hours a day. Aircraft operators must choose an airport atMAC reliever airports with an air traffic control tower. At the two which to base their aircraft. Airports in Minnesota are required toreliever airports without an air traffic control tower (LVN and 21D), submit to the State a report that identifies the aircraft based atthe operations totals are estimated through various methods and their facilities for 180 days or more. The tables below show theavailable data.2017 and 2018 reliever airport operations and reliever airport Reliever Airport OperationsAirportLVN21DMICSTPFCMANEANNUAL TOTAL201736,67028,33734,22340,48990,83574,943305,497201832,98631,69338,10940,11688,76275,465307,131YY Comparison2018-2017(3,684)3,3563,886(373)(2,073)5221,634 Source: MAC Airport Development and FAAReliever Airports Based Aircraft AirportLVN21DMICSTPFCMANE ANNUAL TOTAL 2017135193168873733771,333 2018142189168903643811,334 YY Comparison 2018-20177(4)-3(9)41 Source: MAC Airport Development and FAALVN = Airlake | 21D = Lake Elmo | MIC = Crystal | STP = St. Paul Downtown | FCM = Flying Cloud | ANE = Anoka County-Blainexi'