{"schema_version":1,"airport":"U54","entries":[{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"09a8304c7d44","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: 4 FT FENCE AT 0 FT, 85 FT R; 325 FT RIDGE 1000 FT, ON CNTRLN; 300 FT RIDGE 350 FT, 500 FT L; 60 FT RIDGE 250 FT, 175 FT R.","source":"APT_RMK","original":"4 FT FENCE AT 0 FT, 85 FT R; 325 FT RIDGE 1000 FT, ON CNTRLN; 300 FT RIDGE 350 FT, 500 FT L; 60 FT RIDGE 250 FT, 175 FT R.","fields":[{"field":"REMARK","old":"RWY 17 +4 FT FENCE AT 0 FT 85 FT R; +500 FT RDG AT 1000 FT ON CNTRLN; +500 FT RDG AT 500 FT 200 FT R; +30 FT RDG AT 200 FT ON CNTRLN.","new":"4 FT FENCE AT 0 FT, 85 FT R; 325 FT RIDGE 1000 FT, ON CNTRLN; 300 FT RIDGE 350 FT, 500 FT L; 60 FT RIDGE 250 FT, 175 FT R."}]},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"8fcaa825b17f","priority":"fyi","category":"runway","kind":"changed","summary":"runway 17: controlling obstacle changed (now 50 ft tall, 375 ft from threshold, 0 ft either side of centerline, clearance slope 7:1); controlling obstacle: TREE -> HILL","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":"B"},{"field":"CNTRLN_OFFSET","old":"50","new":"0"},{"field":"DIST_FROM_THR","old":"160","new":"375"},{"field":"OBSTN_CLNC_SLOPE","old":"3","new":"7"},{"field":"OBSTN_TYPE","old":"TREE","new":"HILL"}]},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"5f27ee27dbef","priority":"fyi","category":"runway","kind":"changed","summary":"runway 35: controlling obstacle changed (now 160 ft tall, 1275 ft from threshold, 300 ft left of centerline, clearance slope 7:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"R","new":"L"},{"field":"DIST_FROM_THR","old":"1000","new":"1275"},{"field":"OBSTN_CLNC_SLOPE","old":"5","new":"7"},{"field":"OBSTN_HGT","old":"170","new":"160"}]}],"first_cycle":"2025-09-04","last_cycle":"2025-09-04"}