Why is Alpha so secret, and so badly hidden?

[cantremember]

Something that escapes me is why there was a need for so much secrecy around site Alpha. The WAU was general knowledge around Pathos II so what was the big deal of hiding its core chamber.

Also IMO it would have been farely difficult to keep it secret considering its location, it's right between Tau and Phi.. the front entrance is pretty well hidden between the rocks, but there is an access tunnel that leads straight to a path and open area in front of Phi.

There's also the cargo shaft between Tau and Phi, the inside of Alpha is right against the monorail in some part, risking discovery during maintenance or construction. (I'm assuming Alpha was built first because constructing it without raising suspicion would have been an even more gargantuan feat) I also think it would have been difficult to get supplies and personel in and out of Alpha unnoticed. I mean I suppose it's possible no one noticed and they even succeeded according to the story, but considering Alpha's proximity to Tau and Phi it seems kind of impractical to do that safely if they're so bent on secrecy.