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
Letlhakane diamond mine at a processing plant at its sister mine, Orapa diamond mine, about distant. The Letlhakane mine is also managed from the Orapa mine. In 2015, over 2.1 million tons per year of ore was mined, and over 2.3 million tons was treated, resulting in 583,000 carats of diamond. As of 2017, the Letlhakane Mine ceased open pit operations and completed a plant for the processing of tailings. This is expected to extend the life of the operations at this facility until 2043. Letlhakane diamond mine The Letlhakane diamond mine is a diamond mine located in Botswana about west of the