The Ministry of Energy, Northern Development and Mines (MENDM) was the ministry responsible for developing a safe, reliable and affordable energy supply across the province, overseeing Ontario’s mineral sector and promoting northern economic and community development.

The last Minister of Northern Development and Mines was Hon.

The Ministry's programs also included the Northern Ontario Heritage Fund, and the creation and funding of local services boards to provide essential services in remote Northern Ontario communities which are not served by incorporated municipal governments.

[1] [4] The OBM Progress Medal was given out by the Ontario Bureau of Mines and the Ministry of Northern Development and Mines in 1991 to celebrate 100 years of progress.

Featuring a Trillium grandiflorum laid over a Pickaxe, the Medal weighs 17 grams.