Let me just say rooftop jumping is [censored] awesome, but it really svcks cause I cant get over the bridge...I've tried several times...died each time..and I an at a loss for how to get past the electromagnetic sentries. One shot your dead. Should I try going through from below? (I mean i didn't want to cause climbing the buildings was just fun)...but I am trying to be as clean as possible on this mission (I think ive only killed 1 or 2 guys thus far) and id rather not just annihilate everyone just to get past the bridge, (also do the electro-sentries count as a dead body?

Kaldwin's Bridge, as in, Jessamine and Emily Kaldwin. I just removed the whale oil tanks connected to the Arc Pylons and everything was OK.

Kunwall bridge? lol.

Anyway, I got past that device by using the passage under the bridge IIRC. Fast-blinking there to be exact, using the 1-2 seconds charge-up of the sentries to my advantage.

You could possess a guard and walk through.

There are multiple solutions to getting through.... the safest, albeit more time-consuming, is to disable the arc pylons by removing the whale
oil tanks powering them (to do so typically just follow the thick lines of cable on the ground while avoiding detection). You can also use Dark Vision
to pinpoint their location.

If you don't mind killing, you can rewire the pylon controls and have them take out the guards for you.

Or what Celan said - by possessing a guard. Bit risky, but if you're quick you'll pass through with no problems AND be conveniently positioned
behind a guard once the spell wears out, so you can knock him out.

One easy way is to blink up on the right suspension cable of the bridge, then blink over the to the left and then blink further up and use the hanging rope available and basically climb over the whole bridge.