Puzzling out the Dam Battlegrounds key locations in Arc Raiders is a big part of learning the map. While it's exciting to find a keycard when you're out looting, you then have to work out where to actually use it on the map, as well as if it's worth your time. Uncommon rarity keycards, for example, like Dam Surveillance, rarely have good loot in my experience.
Rare and epic rarity, though, are definitely worth cracking open if you happen to be in the area. While you're looting these rooms, it's important to remember two things. First off, put your key in your safe pocket until you actually use it on the door. This way, even if you get downed on your way there, you can keep the key for another run.
