The Spokane area is underlain by limestone of the Lower Cambrian Badshot Formation and metasediments of the Cambrian to Devonian Index Formation (Lardeau Group) consisting of schist, phyllite, quartzite, slate and limestone.

In 1900 on the Spokane group, the property of the Canadian Lardeau Mining and Development Company, a crosscut tunnel was driven about 30 metres when the ledge was intersected. Drifts were then run 60 metres. The ledge was found to be very broken and a new tunnel was started in order to cut the lead at a greater depth. It was in 30 metres in 1900.

In 1993, Jopec Resources Ltd. examined some old workings that they felt might be those of the old Spokane group. Mineralization was described as being 9 metres thick in thin-bedded, coarse-grained limestone. Unfortunately, the mineralogy was not given. A 0.91-metre channel sample yielded 0.71 per cent copper, 1.23 per cent lead, 18.19 per cent zinc and 5.49 grams per tonne silver. Another sample (grab) taken at the same time assayed 10.36 per cent lead, 3.41 per cent zinc and 81.60 grams per tonne silver (Assessment Report 22917, page 48).