[left-struck]

> In addition to this underground chamber, there are two massive pumps on either sides, which divert the water from whichever river is surging to the other (Arakawa & Edogawa possibly).

You probably mean pumping stations right? Usually single pumps don’t have that kind of flow rate. Just a nit pick though, your comment was really interesting!

[srvmshr]

I'm sorry, yes, two stations with huge pumps. They are like towers, but built from basement level downwards if that impression makes sense.

[OneDeuxTriSeiGo]

Yeah throughout the entire facility (several large chambers with large tunnels between them) there's something like eighty 10MW pumps to move water out of the chambers into the river.