Yellowknife contributed to this growth. Economic growth in the Northwest Territories was 10.6% in 2003. The major employers in Yellowknife include the Territorial Government, the Federal Government, Diavik Diamond Mines, Dominion Diamonds, DeBeers Canada, First Air, NorthwesTel, RTL Robinson Trucking, and the City of Yellowknife. Government employment accounts for 7,644 jobs, a large percentage of those in Yellowknife. During winter, the Tibbitt to Contwoyto Winter Road is opened for semi-trailer truck traffic to take supplies from Yellowknife north to various mines located in the Northwest Territories and Nunavut. This ice road is usually open from the end of January through late
Yellowknife also resulted in new discoveries at the Con Mine, greatly extending the life of the mine. The Yellowknife townsite expanded from the Old Town waterfront, and the new townsite was established during 1945–1946. The Discovery Mine, with its own townsite, operated to the north-northeast of Yellowknife from 1950 to 1969. Between 1939 and 1953, Yellowknife was controlled by the Northern Affairs department (now Indigenous and Northern Affairs Canada) of the Government of Canada. A small council, partially elected and partially appointed, made decisions. By 1953, Yellowknife had grown so much that it was made a municipality, with its own council