US Geological Survey Marker Portals in US
| # | Image | Mod | Area | L | R | HP | Days |
|---|---|---|---|---|---|---|---|
| 1 |  US Geological Survey Marker | -- | 1 | 0 | 0% | 164 | |
| 2 | US Geological Survey Marker - | SB | -- | 6 | 8 | 70% | 140 |
| 3 |  US Geological Survey Marker | PS PS | -- | 2 | 3 | 10% | ∞ |
| 4 |  US Geological Survey Marker | -- | 1 | 2 | 25% | 248 | |