Boulder Airport (Boulder, MT) 3U9 备注
| A42-11 | Runway 11/29 thlds and edges marked with white cones |
| A33-11/29 | Has 1% to 3% uphill gradient from runway 29 end to runway 11 end. |
| A110-4 | For clearance contact helena approach at 406-449-5756/5761, when approach closed contact salt lake artcc at 801-320-2568. |
| A110-3 | -2 ft drainage ditch +1 ft berm west side of runway full length; 43 ft from runway 11/29 centerline. |
| A110-2 | No phone on airport. |
| A110-1 | No snow removal |
