The Colomac Mine was an open pit gold mine in the Northwest Territories that operated between 1990-1992, and 1994-1997. It was operated by Peggy Witte, whose first company Neptune Resources Limited had little success in making a profitable operation. In 1994 the mine reopened by her other company, Royal Oak Mines Incorporated. Low gold prices forced Royal Oak into bankruptcy and the mine was reverted to the federal government of Canada. A major cleanup effort is underway to prevent the mine from polluting the environment. The El Chino mine located near Silver City, New Mexico is an open-pit copper mine Open-pit mining refers to a method of extracting rock or minerals from the earth by their removal from an open pit or borrow. ... General Name, Symbol, Number gold, Au, 79 Chemical series transition metals Group, Period, Block 11, 6, d Appearance metallic yellow Atomic mass 196. ... Motto: None Other Canadian provinces and territories Capital Yellowknife Largest city Yellowknife Commissioner Tony Whitford Premier Joe Handley (Consensus government - no party affiliations) Area 1,346,106 km² (3rd)  - Land 1,183,085 km²  - Water 163,021 km² (12. ... 1994 was a common year starting on Saturday of the Gregorian calendar, and was designated the International year of the Family. ... The Royal Oak Mines Incorporated was a gold mining company, founded in 1990 by Peggy Witte of Washington State. ...

The Colomac Mine processed a total of 12,294,352 tons of ore to produce 535,708 troy ounces (16,662 kg) of gold.