The Therien-Mallaig Mutual Telephone Company was incorporated under The Companies Act on August 18, 1963 and served the area around Therien, Mallaig, Goodridge, St-Vincent and Glendon, Alberta. Specifically, it included Townships 59, 60, 61, 62 and 63, Ranges 8, 9, and 10, West of the 4th Meridian (59, 60, 61, 62, 63-8,9,10-W4). Alberta Government Telephones (AGT) agreed to maintain and repair telephone systems and install or move telephone sets for Therien-Mallaig Mutual Telephone Company on September 1, 1967. The Therien-Mallaig Mutual Telephone Company transferred complete ownership to AGT in 1972.