Ice Mine II

Basic Structure
This 3x3 structure digs deeper in the lunar regolith to find ice. It can be put anywhere, it does not need to touch an Ice Crater. Adds the extraction of Gold, Oxygen, Silicon, Metal and Calcium (basically adds the capabilities of a Regolith Processing Plant 2 to an Ice Mine.  The prerequisites are higher as well as the cost and energy  demands, ofset slightly by smaller workforce and space that would be needed for two separate facilities.)