{"schema_version":1,"airport":"57S","entries":[{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"7f280b46cb0c","priority":"fyi","category":"airport","kind":"changed","summary":"airport phone number changed to 406-334-7038","source":"APT_CON","fields":[{"field":"PHONE_NO","old":"406-334-7037","new":"406-334-7038"}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"bbcc62caca3b","priority":"fyi","category":"airport","kind":"changed","summary":"airframe repair: none -> none; bottled oxygen: none -> none; bulk oxygen: none -> none; engine repair: none -> none","source":"APT_BASE","fields":[{"field":"AIRFRAME_REPAIR_SER_CODE","old":"NONE","new":""},{"field":"BOTTLED_OXY_TYPE","old":"NONE","new":""},{"field":"BULK_OXY_TYPE","old":"NONE","new":""},{"field":"PWR_PLANT_REPAIR_SER","old":"NONE","new":""}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"bc161ef32345","priority":"fyi","category":"airport","kind":"changed","summary":"airport phone number changed to 406-334-7037","source":"APT_CON","fields":[{"field":"PHONE_NO","old":"(406) 334-7037","new":"406-334-7037"}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"b63412beddde","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: +5 FT FENCE 13 FT FM RWY END BOTH SIDES.","source":"APT_RMK","original":"+5 FT FENCE 13 FT FM RWY END BOTH SIDES.","fields":[{"field":"REMARK","old":"+5 FT FENCE 13 FT FM END OF RWY 0B;","new":"+5 FT FENCE 13 FT FM RWY END BOTH SIDES."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"eafa3109a799","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: +5-80 FT TREES WI PRI SFC BGN 25-200 FT FT FM RWY END BOTH SIDES.","source":"APT_RMK","original":"+5-80 FT TREES WI PRI SFC BGN 25-200 FT FT FM RWY END BOTH SIDES.","fields":[{"field":"REMARK","old":"RWY 14 +5 TO +80 FT TREES WI PRI SFC BGN 25 FT FM END OF RWY TO 200 FT FM END OF RWY 0B.","new":"+5-80 FT TREES WI PRI SFC BGN 25-200 FT FT FM RWY END BOTH SIDES."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"f637c020ff50","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Controlling obstacle exceeds a 45-degree slope; approach slope is 16:1 from the displaced threshold.","source":"APT_RMK","original":"CTLG OBSTN EXCEEDS A 45 DEG SLP. APCH SLP 16:1 FM DTHR.","fields":[{"field":"REMARK","old":"APCH SLP 16:1 FM DTHR.","new":"CTLG OBSTN EXCEEDS A 45 DEG SLP. APCH SLP 16:1 FM DTHR."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"78131678450c","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: CRACKS, WEEDS, BROKEN ASPH.","source":"APT_RMK","original":"CRACKS, WEEDS, BROKEN ASPH.","fields":[{"field":"REMARK","old":"CRACKS IN PAVEMENT WITH WEEDS; BROKEN UP ASPH.","new":"CRACKS, WEEDS, BROKEN ASPH."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"1fd6659cb51e","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Displaced threshold is marked with white arrows.","source":"APT_RMK","original":"DTHR MKD WITH WHITE ARROWS.","fields":[{"field":"REMARK","old":"RY 32 DSPLCD THLDS MKD WITH WHITE ARROWS.","new":"DTHR MKD WITH WHITE ARROWS."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"ba89ed96609e","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: In winter, call 406-295-4693.","source":"APT_RMK","original":"WINTER - 406-295-4693.","fields":[{"field":"REMARK","old":"MGR NUMBER DISCONNECTED WINTER MONTHS. CALL OWNER AT 406-295-4693 DURING THIS PERIOD.","new":"WINTER - 406-295-4693."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"1be850046e16","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: LGTD HELI ADJ TO SEGMENTED CIRCLE.","source":"APT_RMK","original":"LGTD HELI ADJ TO SEGMENTED CIRCLE.","fields":[{"field":"REMARK","old":"LGTD HELIPAD ON ARPT ADJACENT TO SEGMENTED CIRCLE.","new":"LGTD HELI ADJ TO SEGMENTED CIRCLE."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"1d41fedfc641","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Lincoln County.","source":"APT_RMK","original":"LINCOLN COUNTY.","fields":[{"field":"REMARK","old":"MAINTAINED BY LINCOLN COUNTY.","new":"LINCOLN COUNTY."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"74d46bdd9ca2","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Pedestrian walking trail in vicinity of movement area.","source":"APT_RMK","original":"PEDESTRIAN WALKING TRAIL INVOF MOV AREA.","fields":[{"field":"REMARK","old":"PEDESTRIANS USING  WALKING TRACK INVOF MOVEMENT AREA.","new":"PEDESTRIAN WALKING TRAIL INVOF MOV AREA."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"94f7aae0eb18","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Snow is not removed and airport surface conditions are not monitored.","source":"APT_RMK","original":"NO SNOW REMOVAL. ARPT SFC COND UNMON.","fields":[{"field":"REMARK","old":"NO SNOW REMOVAL.","new":"NO SNOW REMOVAL. ARPT SFC COND UNMON."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"eb4e230a7b13","priority":"fyi","category":"runway","kind":"changed","summary":"runway 14: controlling obstacle changed (now 80 ft tall, 200 ft from threshold, 0 ft either side of centerline, clearance slope 0:1)","source":"APT_RWY_END","fields":[{"field":"OBSTN_CLNC_SLOPE","old":"1","new":"0"},{"field":"OBSTN_HGT","old":"40","new":"80"}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"f59d3d606e10","priority":"fyi","category":"runway","kind":"changed","summary":"runway 32: controlling obstacle changed (now 69 ft tall, 445 ft from threshold, 0 ft off centerline, clearance slope 3:1)","source":"APT_RWY_END","fields":[{"field":"OBSTN_HGT","old":"65","new":"69"}]}],"first_cycle":"2024-11-28","last_cycle":"2025-12-25"}