I've discovered pretty much every part of Floodmoor Basin (and everywhere else on Eden-6) required for the "Swamped" achievement, but it's marking 14/15 locations... Did I miss a location or something? :
Borderlands 3 Typhon Logs Guide: How to open every locked chest Dead Drop | VG247
The Anvil Map for Borderlands 3 | game-maps.com
Atlas HQ Map for Borderlands 3 | game-maps.com
Kill The Unstoppable - Sanctuary - Side Missions | Borderlands 3 | Gamer Guides®
Raiders of the Lost Rock - Ambermire - Side Missions | Borderlands 3 | Gamer Guides®
Raiders of the Lost Rock - Ambermire - Side Missions | Borderlands 3 | Gamer Guides®