Turns out I've lost nearly all of the coolant from my secondary cooling system and am trying to diagnose the problem.

Things I noticed:
-All of the hoses appear to be in good condition.
-Coolant is dripping from the center of the engine bay.
-After inspecting the turbo area, it appears the valley below the turbo is wet.

The intake manifold is still on the truck, so I haven't been able to get a better look. Is there anything else near the area I am describing that has coolant? My guess is the turbo water inlet?

Perhaps this,

 

Looks like you are on the right track. Get a small inspection mirror and a flash light and look a little closer.
Good luck !

 

I can't think of anything else it would be except EGR. Which is right there to look at.

 

Dude make sure you aren't losing it from the lower port of the secondary cooling tank. It's a MAJOR PITA to get to, and your probably not, but worth just a check before you refill it. Do not freak out either, I ran something like 300 miles at 65mph with NO coolant in the secondary cooling system. Granted, I didn't have my EGR even on my truck at that point, but my truck still runs like a boss! Knock on wood! That was also like 15k miles ago.

 

Is the lower port of that tank on the bottom of the secondary tank? If so, that's still to the passenger side of the truck. The leak appears to be from the turbo valley area.

What does the secondary system handle? EGR, fuel cooling? Anything else? I have my EGR disabled, and can remove it if necessary.

 

EGR is the passenger side bank isn't it? Anybody have a clear photo?

 

Yep. If it's coming from under the turbo, then it might be one of the fittings or something. Flip through the coffee table book in the tech folder. See if you can take a video or picture of the truck on and where you think it's leaking from. EGR, Fuel Cooler and a couple of other things, not much, the EGR would have been the big thing. It would be leaking from the EGR down into the valley, but I am guessing one of the connections around the turbo.