The BW 4 occurrence is located south of Wattaway Creek, approximately 500 metres north of Wood Mountain Ski Park.

The area is underlain by intermediate to mafic basalts, volcanic tuffs and associated breccias, all of the Upper Triassic Karmutsen Formation (Vancouver Group). The basalt is typically fine-grained and porphyritic and contains abundant thin quartz stringers.

Locally, an 8 metre wide gossanous zone with interlaced silicified chlorite breccia and carbonate breccia hosts pyrite, chalcopyrite and tetrahedrite(?) mineralization. In 1988, a sample (BW 1) assayed 1.33 grams per tonne gold, 12.9 grams per tonne silver, 0.175 per cent zinc and 2.07 per cent copper (Assessment Report 17093).

In 1988, Nation River Resources completed a program of prospecting, rock and soil sampling and a ground electromagnetic survey on the area as the BW 4 claim.