Situated below Trevoole hamlet, the mine worked three northeast-trending lodes named North Lode, Main Lode, and South Lode. Main Lode was accessed through a series of shafts spanning approximately 450 yards along its strike, most of which are now obscured. The grid reference indicates the ruins of an engine house just northeast of Trevoole hamlet, with a large shaft burrow located nearby in an adjacent field.

Between 1827 and 1829, Trevoole Mine yielded 1,548 tons of copper ore. From 1856 to 1862, an additional 3,400 tons of 4.5% copper ore and some black tin were extracted. Although the mine ceased operations in 1841, it was re-worked from 1856 to 1864. In 1886-1887, there was an unsuccessful attempt to reopen it to locate the western extension of the Great Flat Lode, believed to pass through the sett.

Note: While Dines and Hamilton Jenkin agree on the identification of Trevoole Mine, the latter equates West Wheal Grenville with Gernick Mine, situated slightly further south. The corrigenda to the 1988 reprint of Dines clarify that Trevoole Mine was generally known as West Wheal Grenville, but this name was also adopted by Wheal Top and Gernick Mine when they were restarted in 1851.