Lac de Gras a wide and long stream called the Narrows. The median flood peak discharge in the Narrows is making it an important corridor for fish movements. Lac de Gras Lac de Gras is a lake approximately north east of Yellowknife, in the Northwest Territories of Canada. Lac de Gras was the centre of the diamond rush of the 1990s. There are two working, and one closed, diamond mines in the area, Diavik Diamond Mine, Ekati Diamond Mine, and the care and maintenance Snap Lake Diamond Mine. It was called Ekati by aboriginal peoples. The lake is ultraoligotrophic but supports a slow-growing
Ekati Diamond Mine company. The next kimberlites to be developed at Ekati will be mined using open pit methods and are named Jay and Sable, discovered in 1993 and 1995, respectively. Underground mining of the Misery kimberlite will commence in 2020, after open pit operations have been completed. Ekati Diamond mine, which is currently operated by Dominion Diamond is scheduled to remain operational until 2033. On November 13, 2012, CBC reported that the Harry Winston Diamond Corporation (now: Dominion Diamond Mines), 40% owners of Diavik Diamond Mine, would buy Ekati for US$500 million. Diamonds at the Ekati site are found in 45- to