You are right, there is not a FAA control tower there. It is still a private advisory tower, which on the first position report they will give out current weather, winds, runway braking report, runway condition and advise of any other traffic. But they do weather, which they are well equipped and trained on. They can't give IFR clearances, and it looks like there is not a NDB approach there anymore so it is possibly a FVR only airport now. And it is still a privately owned airport.
Since it is a mine, lots of traffic going in and out that supports the mine and employees. It is not open to the public except for emergency only. And they have a great mess hall. When ever I had to stay on the ground there, I chose going to the mess hall over taking a tour of the mine.