Question: Which mine is no longer in service, Colomac Mine or Red Lake Mine?

Context paragraphs:
Key Lake mine: The Key Lake mine is a former uranium mine in Saskatchewan, Canada, and the site of the largest uranium mill in the world.  It is five-hundred and seventy kilometres north of Saskatoon by air on the southern rim of the uranium-rich Athabasca Basin.  Key Lake was initially developed to open-pit mine two nearby uranium ore deposits: the Gaertner deposit and the Deilmann deposit.  Mining of this ore ceased in the late 1990s; the Key Lake mill now processes uranium ore from the McArthur River mine and from existing stockpiles on site.  High-grade ore from McArthur river is blended with lower grade local rock before being passed through the mill.  The mill has an annual production capacity of 18 million pounds of UO.  In addition, ammonium sulfate fertilizer is produced as a byproduct from used reagents.  The pits of the mined out local deposits are being used as mill tailings management facilities.

Red Lake Mine: The Red Lake mine is one of the largest gold mines in Canada and in the world.  The mine is located in northwestern Ontario at Red Lake.  The mine has estimated reserves of 3.23 million oz of gold.

Colomac Mine: The Colomac Mine was a privately owned and operated open pit gold mine located 220 km northwest of Yellowknife in the Northwest Territories in Canada .  The Colomac mine operated between 1990–1992, and 1994–1997.  It was operated by Neptune Resources Limited that had little success in making a profit during its operation.  In 1994, the mine had reopened under Royal Oak Mines Inc.  Both Neptune Resources and Royal Oak Mines where both owned and operated by Peggy Witte.  Due to low gold prices and high cost of mining, Royal Oak Mines was forced into bankruptcy.  The Federal Government of Canada became owners of the mine, along with the related environmental issues.  A major cleanup effort is under way to prevent the mine from polluting the environment, but this might be too late at this stage.  This mine is now owned and controlled by the Indigenous and Northern Affairs department of the Federal government, while Public Works and Government services is the current contracting authority.

Seven Clans Casinos: Seven Clans Casinos is a tribal gaming enterprise which is owned and operated by Red Lake Nation, and consists of three casinos: Seven Clans Casino Red Lake, Seven Clans Casino Warroad, and Seven Clans Casino Thief River Falls.  Red Lake Nation also operates the Super 8 and Lakeview Restaurant in Warroad, Minnesota.  Seven Clans Casinos is operated under Red Lake Gaming Enterprises and is licensed under the Red Lake Gaming Commission.

Red Lake, Minnesota: Red Lake is a census-designated place (CDP) within the Lower Red Lake unorganized territory located in Beltrami County, Minnesota, United States.  As of the 2010 census, Red Lake had a total population of 1,731.  The Red Lake Indian Reservation is based in Red Lake.

Red Lake Senior High School: Red Lake Senior High School is a public state-funded high school in unincorporated Red Lake, in Beltrami County, northern Minnesota, USA.  The high school is located on the Red Lake Indian Reservation on which members of the Red Lake Band of Chippewa (Ojibwe) Indians live, and has over 300 students.  The school's mascots are the "Ogichidaag" and "Ogichidaakwag" (warriors and lady warriors).  The school also hosts its own radio station, Ka-MOD (94.1 FM).  The school is a part of Red Lake School District (Independent School District #38).

Karl Brooks Heisey: Karl Brooks Heisey (b.1895 Markham, Ontario d. 7 December 1937 Toronto, Ontario) was a well-known Canadian mining engineer and mining executive in the 1930s.  Heisey pioneered the exploration and development of the Sanshaw/Red Lake metal deposits located in northwest Ontario in the 1930s.  The Red Lake Mine is one of the richest gold mines in the world, still in production today with annual production of 600,000 ounces gold and over 11 million ounces produced to date.

Colomac Airport: Colomac Airport (TC LID: CFY8) , was located near Colomac Mine in the Northwest Territories, Canada where caribou may be found on the runway.  Prior permission was required to land except in the case of an emergency.

Saskatchewan Highway 914: Highway 914 is a provincial highway in the northwest and far north regions of the Canadian province of Saskatchewan.  It begins at a turn in Highway 165 and officially ends at Key Lake mine.  Highway 914 goes north through scenic parts of Saskatchewan, including Pinehouse Lake and Gordon Lake, and does not intersect with any province-owned roads between 165 and Key Lake Mine.  Highway 914 is about 268 km (167 mi) long.

Northland Pyrite Mine: The Northland Pyrite Mine, also known as James Lake Mine, Rib Lake Mine, Harris Mine or simply Northland Mine, is an abandoned underground mine in Northeastern Ontario, Canada, located on the southwestern shore of James Lake in Best Township of Temagami.  It was operated by the Northland Mining Company during the early 1900s with the construction of a 91 m shaft and many open-cuts north of the shaft.  Minerals present at the mine include chalcopyrite, pyrite and pyrrhotite, deposited in Precambrian volcanic rock of the Canadian Shield.

Supporting paragraphs: Colomac Mine Red Lake Mine
Answer: The Colomac Mine