{"schema_version":1,"airport":"ALX","entries":[{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"c40c074bfbd3","priority":"fyi","category":"runway","kind":"changed","summary":"runway 18: controlling obstacle changed (now 129 ft tall, 2006 ft from threshold, 572 ft right of centerline, clearance slope 15:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":"R"},{"field":"CNTRLN_OFFSET","old":"118","new":"572"},{"field":"DIST_FROM_THR","old":"1016","new":"2006"},{"field":"OBSTN_CLNC_SLOPE","old":"14","new":"15"},{"field":"OBSTN_HGT","old":"57","new":"129"}]},{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"6a328f6c138d","priority":"fyi","category":"runway","kind":"changed","summary":"runway 36: controlling obstacle changed (now 46 ft tall, 1117 ft from threshold, 347 ft left of centerline, clearance slope 19:1); controlling obstacle: TREES -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"R","new":"L"},{"field":"CNTRLN_OFFSET","old":"284","new":"347"},{"field":"DIST_FROM_THR","old":"737","new":"1117"},{"field":"OBSTN_CLNC_SLOPE","old":"17","new":"19"},{"field":"OBSTN_HGT","old":"30","new":"46"},{"field":"OBSTN_TYPE","old":"TREES","new":"TREE"}]}],"first_cycle":"2025-10-30","last_cycle":"2025-10-30"}