{"schema_version":1,"airport":"CKC","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"7461a3009f00","priority":"action","category":"remark","kind":"removed","summary":"remark removed: COMMUNICATIONS PRVDD BY PRINCETON RADIO ON FREQ 122.3 (GRAND MARAIS RCO).","source":"ATC_RMK","original":"COMMUNICATIONS PRVDD BY PRINCETON RADIO ON FREQ 122.3 (GRAND MARAIS RCO)."},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"7f9b3aaa32e8","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.3 via the Grand Marais outlet no longer available","source":"FRQ"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"45084af679da","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: For clearance contact MINNEAPOLIS ARTCC at 651-463-5588.","source":"APT_RMK","original":"FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.","fields":[{"field":"REMARK","old":"FOR CD IF UNA TO CTC ON FSS FREQ, CTC MINNEAPOLIS ARTCC AT 651-463-5588.","new":"FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588."}]},{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"1f5124986636","priority":"action","category":"navaid","kind":"removed","summary":"CKC NDB (358) decommissioned/removed","source":"NAV_BASE"},{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"557267a6786f","priority":"action","category":"frequency","kind":"removed","summary":"frequency 358.0 (CKC NDB) removed","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"a0aea6d9d24c","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: 4 FT BRUSH, 95 FT DIST, 218 FT R.","source":"APT_RMK","original":"4 FT BRUSH, 95 FT DIST, 218 FT R."},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"7f8a40ea8b5e","priority":"fyi","category":"runway","kind":"changed","summary":"runway 10: controlling obstacle changed (now 6 ft tall, 373 ft from threshold, 177 ft right of centerline, clearance slope 28:1); controlling obstacle: none -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"R"},{"field":"CNTRLN_OFFSET","old":"","new":"177"},{"field":"DIST_FROM_THR","old":"","new":"373"},{"field":"OBSTN_CLNC_SLOPE","old":"34","new":"28"},{"field":"OBSTN_HGT","old":"","new":"6"},{"field":"OBSTN_TYPE","old":"","new":"TREE"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"b3f120dbe69a","priority":"fyi","category":"runway","kind":"changed","summary":"runway 28: controlling obstacle changed (now , clearance slope 34:1); controlling obstacle: BRUSH -> none","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":""},{"field":"CNTRLN_OFFSET","old":"20","new":""},{"field":"DIST_FROM_THR","old":"445","new":""},{"field":"OBSTN_CLNC_SLOPE","old":"15","new":"34"},{"field":"OBSTN_HGT","old":"16","new":""},{"field":"OBSTN_TYPE","old":"BRUSH","new":""}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"bb1fee165b58","priority":"fyi","category":"runway","kind":"changed","summary":"runway 10: runway end elevation: 1803.1 -> 1803 ft MSL; touchdown zone elevation: 1803.1 -> 1803 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"1803.1","new":"1803"},{"field":"TDZ_ELEV","old":"1803.1","new":"1803"}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"bd48f1c33a22","priority":"fyi","category":"runway","kind":"changed","summary":"runway 28: touchdown zone elevation: 1797 -> 1796.9 ft MSL","source":"APT_RWY_END","fields":[{"field":"TDZ_ELEV","old":"1797","new":"1796.9"}]}],"first_cycle":"2024-09-05","last_cycle":"2026-09-03"}