The Superior (Lucky Todd) occurrence is located north of Railroad Creek, approximately 1 kilometre north west of its junction with Vuich Creek.

The area is underlain by dioritic intrusive rocks of the late Jurassic to early Cretaceous Eagle Plutonic Complex. To the west coarse-clastic sedimentary rocks of the Cretaceous Pasayten Group and Eocene Princeton Group are exposed.

Locally, a large quartz porphyritic dike cuts granodiorite. Pyrite and traces of chalcopyrite occur in narrow seams along fractures in the dike. Later reports, in 2005, describe a shear zone, up to 4.5 metres wide, within greenstones and intrusives hosting disseminations of chalcopyrite, pyrite, bornite and tetrahedrite. The zone trends north and has been intermittently traced for 600 metres.

A sample taken across 1.5 metres assayed 0.69 gram per tonne gold and nil copper (Minister of Mines Annual Report 1913, page 232).

In 1990, two samples (236052 and 236057) assayed 1.21 and 1.67 per cent copper, 157.5 and 96.8 grams per tonne silver with 0.10 and 0.22 gram per tonne gold (Property File - Imperial Metals Corp. [1990-06-11]: Geochemical Analysis Certificate - No. 90-1691 - Rail Claims).

In 2005, two select grab samples from the adit 1 dump assayed 2.12 and 1.66 per cent copper and 362 and 6 grams per tonne silver with 0.03 and 1.51 grams per tonne gold, whereas historical samples from the third adit are reported to have assayed up to 376 grams per tonne silver and 1.6 per cent copper over 1.25 metres (Property File - Claron Ventures Inc. [2005-07-31]: Geological Evaluation Report on the Lucky Todd Mineral Claims).

The area has been explored since the late 1800’s. By 1937, exploration work included 11 adits, with more than 180 metres of underground development. In 1980, programs of soil geochemical sampling and geophysical surveys were completed. In 1990, Imperial Metals examined the area as the Rail claims. In 2005, Claron Ventures evaluated the property.