The Trethewey Mine is an abandoned silver mine in Cobalt, Ontario, Canada, located northwest of the Coniagas Mine near Sasaginaga Lake. [1] The mine was discovered in May 1903 by William Griffith Trethewey.[ citation needed ]
47°24′00″N79°41′07″W / 47.4°N 79.6852777778°W
Timiskaming