South Dakota historic civil engineering landmark. Portal in Norton Acres South Dakota United States
| # | Image | Mod | Area | L | R | HP | Days |
|---|---|---|---|---|---|---|---|
| 1 |  South Dakota historic civil engineering landmark. | PS PS | -- | 5 | 8 | 85% | 64 |
| # | Image | Mod | Area | L | R | HP | Days |
|---|---|---|---|---|---|---|---|
| 1 | South Dakota historic civil engineering landmark. | PS PS | -- | 5 | 8 | 85% | 64 |