{"schema_version":1,"airport":"OLZ","entries":[{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"92e76420b5bb","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: controlling obstacle changed (now , clearance slope 20:1); controlling obstacle: BRUSH -> none","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":""},{"field":"CNTRLN_OFFSET","old":"81","new":""},{"field":"DIST_FROM_THR","old":"445","new":""},{"field":"OBSTN_CLNC_SLOPE","old":"30","new":"20"},{"field":"OBSTN_HGT","old":"8","new":""},{"field":"OBSTN_TYPE","old":"BRUSH","new":""}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"b8556deec875","priority":"action","category":"tower","kind":"changed","summary":"approach/departure control now provided by DSM (was ALO); approach/departure control: WATERLOO (ALO) -> DES MOINES (DSM); secondary approach/departure control: ARTCC ZMP (MINNEAPOLIS, MN) (special) -> ZMP (ARTCC)","source":"ATC_BASE","fields":[{"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":"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":"PRIMARY_APCH_RADIO_CALL","old":"WATERLOO","new":"DES MOINES"},{"field":"PRIMARY_DEP_RADIO_CALL","old":"WATERLOO","new":"DES MOINES"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"ae23977e124e","priority":"action","category":"frequency","kind":"changed","summary":"frequency now provided by DSM (was ALO); approach control radio call: WATERLOO -> DES MOINES","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"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"f509d67856c5","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":"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":"32038077567a","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD CTC DES MOINES APCH AT 515-974-8016. WHEN DES MOINES APP CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","source":"APT_RMK","original":"FOR CD CTC DES MOINES APCH AT 515-974-8016. WHEN DES MOINES APP CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","fields":[{"field":"REMARK","old":"FOR CD CTC WATERLOO APCH 319-233-4835. WHEN WATERLOO APCH CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","new":"FOR CD CTC DES MOINES APCH AT 515-974-8016. WHEN DES MOINES APP CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588."}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"263b259ecb11","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":"354f19b1bfa1","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":"23cf081d4c52","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: AG OPS DRG SUMMER MONTHS","source":"APT_RMK","original":"AG OPS DRG SUMMER MONTHS","fields":[{"field":"REMARK","old":"AG OPERATIONS DURING SUMMER MONTHS","new":"AG OPS DRG SUMMER MONTHS"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"8acf5ce20d8c","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: RWY 18/36 CLSD AFT FST SNWFL.","source":"APT_RMK","original":"RWY 18/36 CLSD AFT FST SNWFL.","fields":[{"field":"REMARK","old":"RY 18/36 CLSD AFTER FIRST SNOWFALL.","new":"RWY 18/36 CLSD AFT FST SNWFL."}]},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"39b0402817aa","priority":"action","category":"airport","kind":"removed","summary":"airport attendance schedule: dropped MON-SAT 0800-DUSK","source":"APT_ATT"},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"658369c4100c","priority":"fyi","category":"airport","kind":"added","summary":"airport attendance schedule: added UNATNDD","source":"APT_ATT"},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"7946af11c8e8","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: AFT HRS SVC BY APNTMT CALL (563)880-2915.","source":"APT_RMK","original":"AFT HRS SVC BY APNTMT CALL (563)880-2915."},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"5e64bc551908","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":"6990a9b2843c","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD CTC WATERLOO APCH 319-233-4835. WHEN WATERLOO APCH CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","source":"APT_RMK","original":"FOR CD CTC WATERLOO APCH 319-233-4835. WHEN WATERLOO APCH CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","fields":[{"field":"REMARK","old":"CLEARANCE DELIVERY PHONE: FOR CD CTC WATERLOO APCH 319-233-4835. WHEN WATERLOO APCH CLSD, FOR CD CTC CHICAGO ARTCC AT 630-906-8921.","new":"FOR CD CTC WATERLOO APCH 319-233-4835. WHEN WATERLOO APCH CLSD, FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588."}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"3ff0745ade73","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":"fffa7a75c41e","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 WATERLOO APCH CTL CLSD.","new":"APCH/DEP SVC PRVDD BY MINNEAPOLIS ARTCC ON FREQ 118.9 (REMOTED FROM WATERLOO) WHEN WATERLOO APCH CTL CLSD."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"83a24d394aea","priority":"fyi","category":"airport","kind":"changed","summary":"airport phone number changed to 319-283-5440","source":"APT_CON","fields":[{"field":"PHONE_NO","old":"563-880-2915","new":"319-283-5440"}]}],"first_cycle":"2024-11-28","last_cycle":"2025-12-25"}