The region was regularly visited by
Innu indigenous people for hunting and trapping, but they did not permanently reside there. Because of mining development in the early 1950s, some 200
Naskapi from
Fort Chimo were relocated to Schefferville in 1955 and settled near the train station in shacks built with scavenged materials. In 1956, a dozen Innu families from
Maliotenam, near
Sept-Îles, arrived and set up an encampment at Knob Lake, near the present airport. They served as guides for geological exploration work, and helped on the railway construction from Sept-Îles. In 1957, the Schefferville municipal authorities moved the Innu and Naskapi to a
site on John Lake, some four miles north-north-east of Schefferville, where they lived in poverty without water, sewage, electricity, schools, and medical facility. Initially living in tiny shacks, by 1962 Indian and Northern Affairs had built 30 houses for them. In the 1970s, the Naskapi began negotiations for a settlement of their Aboriginal claims. In 1978, they ceded any rights or interests to the Matimekosh Reserve as a prerequisite to the Northeastern Québec Agreement that provided for the formation of their own reserve. In 1983, they moved to the nearby
Kawawachikamach Reserve and left the Innu as the sole occupants of the Matimekosh Reserve. In 1982, the
Iron Ore Company of Canada closed its mines near Schefferville and most of the town's population left. In 1985 and 1995, the Government of Canada purchased more land in the defunct Municipality of Schefferville and added this to the reserve in 1996 and 1998, bringing redevelopment to the reserve through the recovery of some of the town's infrastructure. ==Demographics==