Hayes Emergency Airstrip Airport (Hayes, SD) SD21 备注
| A57-32 | Approach ratio includes vehicle clearance over hwy located 450' from southeast threshold. |
| A14 | Cell 605-280-6014 |
| A110-1 | For clearance contact minneapolis artcc at 651-463-5588. |
| A11 | Donald van NESS-CHMN/county board of commissioners. |
