{"schema_version":1,"airport":"ALO","entries":[{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"ff5582a0fa53","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 12 amended (amdt 1A)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 12","amdt":"1A","pdf":"https://aeronav.faa.gov/d-tpp/2607/00945R12.PDF"}},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"96b41bb72b15","priority":"fyi","category":"chart","kind":"changed","summary":"airport diagram changed","source":"D-TPP","chart":{"code":"APD","name":"AIRPORT DIAGRAM","amdt":"","pdf":"https://aeronav.faa.gov/d-tpp/2607/00945AD.PDF"}},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"7f074d365153","priority":"action","category":"tower","kind":"changed","summary":"approach/departure control now provided by DSM (was ALO); control facility operator: Federal Aviation Admin (F) -> none; approach/departure control: WATERLOO (ALO) -> DES MOINES (DSM); secondary approach/departure control: ARTCC ZMP (MINNEAPOLIS, MN) (special) -> ZMP (ARTCC); control facility approach/departure call: WATERLOO -> none; primary control facility hours: 0600-2000 -> none; facility type: tower plus terminal radar approach control (ATCT-TRACON) -> air traffic control tower (ATCT); secondary control facility hours: 2000-0600 -> none","source":"ATC_BASE","fields":[{"field":"APCH_DEP_OPER_CODE","old":"F","new":""},{"field":"APCH_P_PROVIDER","old":"ALO","new":"DSM"},{"field":"APCH_S_PROVIDER","old":"ARTCC ZMP (MINNEAPOLIS, MN)","new":"ZMP"},{"field":"APCH_S_PROV_TYPE_CD","old":"S","new":"C"},{"field":"CTL_FAC_APCH_DEP_CALLS","old":"WATERLOO","new":""},{"field":"CTL_PRVDING_HRS","old":"0600-2000","new":""},{"field":"DEP_P_PROVIDER","old":"ALO","new":"DSM"},{"field":"DEP_S_PROVIDER","old":"ARTCC ZMP (MINNEAPOLIS, MN)","new":"ZMP"},{"field":"DEP_S_PROV_TYPE_CD","old":"S","new":"C"},{"field":"FACILITY_TYPE","old":"ATCT-TRACON","new":"ATCT"},{"field":"PRIMARY_APCH_RADIO_CALL","old":"WATERLOO","new":"DES MOINES"},{"field":"PRIMARY_DEP_RADIO_CALL","old":"WATERLOO","new":"DES MOINES"},{"field":"SECONDARY_CTL_PRVDING_HRS","old":"2000-0600","new":""}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"b2480c366271","priority":"action","category":"tower","kind":"changed","summary":"ATC service: BASIC RADAR SVC CTC APCH CTL. -> BASIC RADAR SVC","source":"ATC_SVC","fields":[{"field":"CTL_SVC","old":"BASIC RADAR SVC CTC APCH CTL.","new":"BASIC RADAR SVC"},{"field":"FACILITY_TYPE","old":"ATCT-TRACON","new":"ATCT"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"d9c53d5d4cf5","priority":"action","category":"frequency","kind":"changed","summary":"approach control radio call: WATERLOO -> DES MOINES","source":"FRQ","fields":[{"field":"FACILITY_TYPE","old":"ATCT-TRACON","new":"ATCT"},{"field":"PRIMARY_APPROACH_RADIO_CALL","old":"WATERLOO","new":"DES MOINES"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"19e1a71ddf91","priority":"action","category":"frequency","kind":"removed","summary":"frequency 126.75 (APCH/S DEP/S) removed","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"277e65315571","priority":"action","category":"remark","kind":"changed","summary":"remark updated: APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQS 118.9/251.15 (REMOTED FROM WATERLOO) WHEN DES MOINES APCH CTL CLSD.","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQS 118.9/251.15 (REMOTED FROM WATERLOO) WHEN DES MOINES APCH CTL CLSD.","fields":[{"field":"FACILITY_TYPE","old":"ATCT-TRACON","new":"ATCT"},{"field":"REMARK","old":"APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQ 118.9 (REMOTED FROM WATERLOO) WHEN WATERLOO APCH CTL CLSD.","new":"APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQS 118.9/251.15 (REMOTED FROM WATERLOO) WHEN DES MOINES APCH CTL CLSD."}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"2c885acada12","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD IF UNA ON 121.9 CTC WATERLOO ATCT AT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","source":"APT_RMK","original":"FOR CD IF UNA ON 121.9 CTC WATERLOO ATCT AT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","fields":[{"field":"REMARK","old":"FOR CD CTC WATERLOO ATCT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC  MINNEAPOLIS ARTCC AT 651-463-5588.","new":"FOR CD IF UNA ON 121.9 CTC WATERLOO ATCT AT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588."}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"517ecd5c6132","priority":"fyi","category":"tower","kind":"removed","summary":"ATC service ARTS-II: no longer listed","source":"ATC_SVC","fields":[{"field":"FACILITY_TYPE","old":"ATCT-TRACON","new":""},{"field":"FACILITY_ID","old":"ALO","new":""},{"field":"CTL_SVC","old":"ARTS-II","new":""}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"0ef6963d5fbb","priority":"action","category":"other","kind":"removed","summary":"radar ASR: removed (was hours 0600-2300)","source":"RDR","fields":[{"field":"FACILITY_ID","old":"ALO","new":""},{"field":"FACILITY_TYPE","old":"AIRPORT","new":""},{"field":"RADAR_TYPE","old":"ASR","new":""},{"field":"RADAR_NO","old":"1","new":""},{"field":"RADAR_HRS","old":"0600-2300","new":""}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"b4370ac6e9ad","priority":"action","category":"frequency","kind":"changed","summary":"tower hours changed: 0600-2000 -> none listed local; frequency now provided by DSM (was ALO)","source":"FRQ","fields":[{"field":"FACILITY","old":"ALO","new":"DSM"},{"field":"FAC_NAME","old":"WATERLOO RGNL","new":"DES MOINES INTL"},{"field":"PRIMARY_APPROACH_RADIO_CALL","old":"WATERLOO","new":"DES MOINES"},{"field":"TOWER_HRS","old":"0600-2000","new":""}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"b226c70c94c4","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 118.9 now also listed for WATERLOO RCAG","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"beb940d07869","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 121.9 now also listed for CD/P","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"b593113a1c3a","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 251.15 now also listed for WATERLOO RCAG","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"e86979b4c6fa","priority":"fyi","category":"airport","kind":"changed","summary":"tower type: tower plus terminal radar approach control (ATCT-TRACON) -> air traffic control tower (ATCT)","source":"APT_BASE","fields":[{"field":"TWR_TYPE_CODE","old":"ATCT-TRACON","new":"ATCT"}]},{"cycle":"2025-07-10","from_cycle":"2025-06-12","id":"b4a3d9883eed","priority":"fyi","category":"remark","kind":"added","summary":"new remark: ACR NA TWY A EAST OF RWY 12/30.","source":"APT_RMK","original":"ACR NA TWY A EAST OF RWY 12/30."},{"cycle":"2025-07-10","from_cycle":"2025-06-12","id":"bb6b66a36b40","priority":"fyi","category":"remark","kind":"added","summary":"new remark: TWY A LGT BTN RWY 12/30 & ARMY AVN SUPPORT RAMP NA.","source":"APT_RMK","original":"TWY A LGT BTN RWY 12/30 & ARMY AVN SUPPORT RAMP NA."},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"039ab5856aab","priority":"action","category":"weather","kind":"changed","summary":"AWOS/ASOS phone number changed to 319-209-4125","source":"AWOS","fields":[{"field":"PHONE_NO","old":"319-233-8984","new":"319-209-4125"}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"4387e0f34975","priority":"action","category":"tower","kind":"changed","summary":"secondary approach control: CHICAGO ARTCC (APCH/S CALL IS CHICAGO ARTCC) -> MINNEAPOLIS ARTCC (ARTCC ZMP (MINNEAPOLIS, MN)); secondary departure control: CHICAGO ARTCC (DEP/S CALL IS CHICAGO ARTCC) -> MINNEAPOLIS ARTCC (ARTCC ZMP (MINNEAPOLIS, MN))","source":"ATC_BASE","fields":[{"field":"APCH_S_PROVIDER","old":"APCH/S CALL IS CHICAGO ARTCC","new":"ARTCC ZMP (MINNEAPOLIS, MN)"},{"field":"DEP_S_PROVIDER","old":"DEP/S CALL IS CHICAGO ARTCC","new":"ARTCC ZMP (MINNEAPOLIS, MN)"},{"field":"SECONDARY_APCH_RADIO_CALL","old":"CHICAGO ARTCC","new":"MINNEAPOLIS ARTCC"},{"field":"SECONDARY_DEP_RADIO_CALL","old":"CHICAGO ARTCC","new":"MINNEAPOLIS ARTCC"}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"8392909c16d6","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD CTC WATERLOO ATCT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC  MINNEAPOLIS ARTCC AT 651-463-5588.","source":"APT_RMK","original":"FOR CD CTC WATERLOO ATCT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC  MINNEAPOLIS ARTCC AT 651-463-5588.","fields":[{"field":"REMARK","old":"FOR CD CTC WATERLOO ATCT AT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC CHICAGO ARTCC AT 630-906-8921.","new":"FOR CD CTC WATERLOO ATCT 319-233-4835. WHEN WATERLOO ATCT CLSD, FOR CD CTC  MINNEAPOLIS ARTCC AT 651-463-5588."}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"a4d5867a6d81","priority":"fyi","category":"airport","kind":"changed","summary":"responsible ARTCC name: CHICAGO -> MINNEAPOLIS; ARTCC computer identifier: ZCG -> ZCP; responsible ARTCC: ZAU -> ZMP","source":"APT_BASE","fields":[{"field":"ARTCC_NAME","old":"CHICAGO","new":"MINNEAPOLIS"},{"field":"COMPUTER_ID","old":"ZCG","new":"ZCP"},{"field":"RESP_ARTCC_ID","old":"ZAU","new":"ZMP"}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"9453097b785b","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQ 118.9 (REMOTED FROM WATERLOO) WHEN WATERLOO APCH CTL CLSD.","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQ 118.9 (REMOTED FROM WATERLOO) WHEN WATERLOO APCH CTL CLSD.","fields":[{"field":"REMARK","old":"APCH/DEP SVC PRVDD BY CHICAGO ARTCC ON FREQS 118.9 (REMOTED FROM WATERLOO) WHEN APCH CTL CLSD.","new":"APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQ 118.9 (REMOTED FROM WATERLOO) WHEN WATERLOO APCH CTL CLSD."}]}],"first_cycle":"2025-02-20","last_cycle":"2026-07-09"}