[2] Prior to February 12, 2003, Moisie was an independent city; on that date, it and the Municipality of Gallix were merged into Sept-Îles.

The company was plowing through three feet of pure iron black sand lying on the beaches as raw material for the forge.

Prospectors later explored the region upstream of the river which led to the discovery of large iron ore deposits around Labrador City and Schefferville.

Between 1933 and 1949, the Hudson's Bay Company had a post at Moisie, operating as an outpost of Sept Iles.

[4] On January 1, 1955, the Municipality of Moisie was created out of territory ceded by the Township of Letellier.