Table:
text: Lists of copper mines in the United States
Leading copper-producing mines
Leading copper-producing mines
Rank_ Mine County_and_State Operator_ Source_of_copper Capacity_thousands_of_metric_tons
1 Morenci Greenlee County, Arizona Freeport-McMoRan Copper ore, leached 390
2 Bingham Canyon Salt Lake County, Utah Kennecott Utah Copper Copper-molybdenum ore, concentrated 300
3 Ray Pinal County, Arizona ASARCO Copper ore, concentrated and leached 170
4 Bagdad Yavapai County, Arizona Freeport-McMoRan Copper-molybdenum ore, concentrated and leached 100
5 El Chino Grant County, New Mexico Freeport-McMoRan Copper-molybdenum ore, concentrated and leached 125
6 Sierrita Pima County, Arizona Freeport-McMoRan Copper-molybdenum ore, concentrated and leached 100
7 Tyrone Grant County, New Mexico Freeport-McMoRan Copper ore, leached 80
8 Continental Pit Silver Bow County, Montana Montana Resources LLP Copper-molybdenum ore, concentrated 45

Question: From the list of copper mines in the United States, in Silver Bow County, Montana, if capacity is greater than 45 tons, what is the highest rank found?