Surface and underground work (pits, trenches, tunnels) were completed between 1928 and 1930 on the Copper Cup, Copper Chief (082LNW019) and Vimy (082LNW020) showings. The Copper Chief adjoined the Copper Cup to the east, and the Vimy adjoined the Copper Cup to the southeast.
At the Copper Cup showing, northwest trending silicified zones traverse west striking, north dipping (35 degrees) chlorite schist of the Devonian and/or older? Woolford Creek unit of the Eagle Bay assemblage. These zones contain small bodies of chalcopyrite and pyrite associated with quartz seams and cut the hostrock obliquely. Some disseminated mineralization also occurs.