{"schema_version":1,"airport":"ELK","entries":[{"cycle":"2026-08-06","from_cycle":"2026-07-09","id":"c7b6e742905e","priority":"fyi","category":"runway","kind":"changed","summary":"runway 35: controlling obstacle changed (now 27 ft tall, 980 ft from threshold, 280 ft left of centerline, clearance slope 28:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"270","new":"280"},{"field":"DIST_FROM_THR","old":"990","new":"980"},{"field":"OBSTN_CLNC_SLOPE","old":"30","new":"28"},{"field":"OBSTN_HGT","old":"26","new":"27"}]},{"cycle":"2026-08-06","from_cycle":"2026-07-09","id":"403a445f453b","priority":"fyi","category":"airport","kind":"changed","summary":"segmented circle: yes -> no","source":"APT_BASE","fields":[{"field":"SEG_CIRCLE_MKR_FLAG","old":"Y","new":"N"}]}],"first_cycle":"2026-08-06","last_cycle":"2026-08-06"}