The Kennecott Copper Mines, McCarthy Alaska

1982 PHOTOCOPY OF DRAWING OF MILL NO. 3, FEDERAL LEAD COMPANY, FLOW SHEET

1982 PHOTOCOPY OF DRAWING, AMMONIA LEACHING PLANT

1982 PHOTOCOPY OF DRAWING, AMMONIA LEACHING PLANT

1982 PHOTOCOPY OF DRAWING, AMMONIA LEACHING PLANT

1982 PHOTOCOPY OF DRAWING, AMMONIA LEACHING PLANT ROOF TRUSS DETAILS, SACKING SHED-FLOTATION UNIT

1982 PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT ROOF TRUSS DETAILS, SACKING SHED-FLOTATION UNIT