The Lost Lemon Mine is a legendary lost mine said to be located in the Canadian Province of Alberta.
 The story has been retold in countless books with the authoritative version being "The Lost Lemon Mine" by Tom Primrose.The story first appeared in the 1946 edition of the "Alberta Folklore Quarterly" and later in magazines such as "Canada West".
 The Lost Lemon Mine has also been featured in television documentary series "Northern Mysteries", and worked into the plot of "The Final Sacrifice".
 Countless people have searched for the mine.
 A number of searchers have never returned.
Lost McLeod Mine is a legend of a lost mine in the Northwest Territories of Canada.
 The story has been featured in many books and magazines.
 The events in the legend have led to geographic locations in the Northwest Territories being named Headless Valley and Headless Creek located in Nahanni National Park Reserve.
 A creek called Sheep Creek was renamed McCleod Creek in honour of the Mcleod Brothers.
 20 people have lost their lives searching for The Lost McLeod Mine.
Pebble Mine is the common name of a mineral exploration project investigating a very large porphyry copper, gold, and molybdenum mineral deposit in the Bristol Bay region of Southwest Alaska, near Lake Iliamna and Lake Clark.
 The proposal to mine the ore deposit, using large-scale operations and infrastructure, is controversial.
 Proponents argue that the mine will create jobs, provide tax revenue to the state of Alaska, and reduce American dependence on foreign sources of raw materials.
 Opponents argue that the mine would adversely affect the entire Bristol Bay watershed; and that the possible consequences to fish populations, when mining effluents escape planned containments, are simply too great of a risk.
 Much of this debate concerns the tentative plan to impound large amounts of water, waste rock, and mine tailings behind several earthen dams at the mine site.
 The project is on hold after the loss of funding partners in 2013.
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.
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.
The lost Wheelbarrow Mine is claimed to have been located about 10 mi from Potlatch in Latah County, Idaho.
 The reported location is 3,871 feet above sea level, at coordinates 46.9975° N, 116.7833° W.
 The mine, believed to have been dug prior to 1890, was said to have produced $20,000 in gold, before a falling-out between its operators led to its abandonment.
 One of the operators later returned to the area to find the mine again, but was unsuccessful.
 In June 1939, miners with the Fitsum Mining company uncovered an abandoned mine matching the description of the Wheelbarrow mine, containing human bone presumed to belong to the other operator.
The Ryan House and Lost Horse Well are historic ruins in Joshua Tree National Park, California, United States.
 It was established by the family of J.D. Ryan, the later developers of the Lost Horse Mine, which became the most profitable mine in the area.
 The Lost Horse Well at the Ryan Ranch supplied water to the Lost Horse Mine, 3 mi south and 750 ft , by pipeline.
Pitt Lake's Lost Gold Mine is a legendary lost mine said to be near Pitt Lake, British Columbia, Canada, the supposed wealth of which has held the imagination of people worldwide for more than a century.
 Ever since the years of the Fraser Canyon Gold Rush prospectors and adventurers have been looking for the mine and gold-rush rumors have evolved into legends repeated and enriched over time.
 The mysterious riches are known as Slumach’s Lost Mine, or Lost Creek Mine.
Jolly Jack's Lost Mine is a legend about a hidden placer mine supposed to be located in the Boundary Country of British Columbia.
 The mine has been written about by local historians and various magazines.
 Many have searched for the lost placer mine of Jolly Jack.
 It is a local legend in the Boundary Country.
The Wopkaimin are a small aboriginal tribe that lives in the remote Star Mountains in western Papua New Guinea in what is known as the Fly River socio-ecological region.
 The tribe speaks Faiwol.
 The Ok Tedi Mine, the third largest open pit copper and gold mine in the world is located in their traditional territory.
 Before the coming of the mine with construction starting in 1981 the Wopkaimin lived in a subsistence economy.
 The mine severely impacted the tribe, totally disrupting their traditional patterns of life.
 For one thing, Tabubil a town of 12,500 to house mine workers was built in the midst of their territory.
 Work for wages was available to tribal members, but only at the unskilled level and not on a regular basis.
 The Wopkaimin along with many other ethnic groups living in the area now live on a rotating basis between the town of Tabubil, roadside villages along the Kiunga-Tabubil Highway, and in villages away from the mine as jobs are lost or become available.

Question: What do the Lost McLeod Mine and the Colomac Mine have in common?
Answer: the Northwest Territories of Canada