Dome Mine is situated in the City of Timmins, Ontario, Canada; and was developed during the Porcupine Gold Rush.

[1] Last operated by Canadian company Goldcorp, before it became a subsidiary of American company Newmont, it is one of three mines (along with Hoyle Pond underground and Hollinger Open Pit, both still active) owned by Newmont in the Porcupine district in and around Timmins.

The vein Preston discovered dripped with gold and was referred to as the "Golden Staircase".

[2]: 90, 101  The company built a community, also called Dome, of approximately 60 houses leased to miners with families.

Through its early years, Ambrose Monell, Joseph Delamar, and Jules Bache served as presidents of Dome Mines Limited.