under 50, actual underground mines for metals, under 175 total open pit and underground mines for metal the real numbers for rock quarys * are hidden, and I mus

under 50, actual underground mines for metals, under 175 total open pit and underground mines for metal the real numbers for rock quarys * are hidden, and I must assume that they are also a small portion of the "total" * sell actual blocks of stone vs gravel/fill/agregate