Also, turbines are your friends. If the power isn't on, place a turbine under a lamp post and it should light up green. Go out into the fog and when a denizen grabs onto you, quickly run to the lamp post, knifing the denizen (but not consecutively). He'll jump off and burrow under ground, making a "teleporter." Jump in it and you'll spawn anywhere else in the map where there's a lamp post.
So if you were wondering where the teleporters went, that's where.