No offence but what a clueless advice. And how would that help?
What you need, OP, is to locate the Citadel texture vmt and add $nofog 1 to it. That'll remove the haze. That's how HL2's Citadel is set up.
Can someone help me figure out where the textures are for this model?
You can open the .mdl file with Notepad++ and scroll all the way down to the very very end and it'll have the texture paths.
The very last bit of text in it says models/props_c17/ so that's the folder. Before that you can see the words,
"lamp"
and
"glass2"
(also before that "Body" and "idle" but that's not textures)
So you need to go to the beta (actually the Mega Build or beta w/ Megapatch 4 installed, because those models were fan-made and restored in megapatch 4), and indeed it has lamp.vtf (dark metal) and glass2.vtf (blurry bluish round glass) and you can copy those (+ their vmts) over to your mod and it should work now.