The Eagle occurrence is situated on the New Denver-Three Forks highway, immediately west of Three Forks at 884 metres elevation above sea level, in the Slocan Mining Division.

Regionally, the area lies on the western margin of the Kootenay Arc, in allochthonous rocks of the Quesnel Terrane. In the vicinity of the occurrence, the Quesnel Terrane is dominated by the Upper Triassic Slocan Group, a thick sequence of deformed and metamorphosed shale, argillite, siltstone, quartzite and minor limestone. Rocks of the Slocan Group are tightly and disharmonically folded. Early minor folds are tight to isoclinal with moderate east plunging, southeast inclined axial planes and younger folds are open, southwest plunging with subhorizontal axial planes. The sedimentary sequence has been regionally metamorphosed to lower greenschist facies.

South of the occurrence, the Slocan Group has been intruded by the Middle Jurassic Nelson intrusions which comprise at least six texturally and compositionally distinct phases ranging from diorite to lamprophyre. The most dominant phase is a medium to coarse grained potassium feldspar porphyritic granite. Several feldspar porphyritic granodiorite dikes, apparently related to the Nelson intrusions, also cut the sedimentary sequence near the occurrence (Paper 1989-5).

The property is underlain by massive argillite and quartzite of the Slocan Group and by a granite porphyry plug probably related to the Nelson intrusions. A small quartz vein cuts the granite porphyry near its eastern contact. The vein is 2 to 20 centimetres wide, strikes east and dips 38 degrees north. A short adit explored the vein for about 25 metres. Near the face the vein appeared to pinch out but still carried conspicuous disseminations of tetrahedrite.

Production from the occurrence in 1928 yielded 11,073 grams of silver from a total of four tonnes mined. The property was held by Golden Slipper Mines Ltd. in the early 1950's.