The property is located at 1097 metres elevation on the south side of Porcupine Creek, about 1.6 kilometres east of the Salmo River and 3.2 kilometres south-southeast of Ymir. The Porcupine property (82 F/6, Ag 2) adjoins to the northeast.

The Nevada claim (Lot 3504) was located in July 1898 by J.B. Stover and Crown-granted in 1899 to R.C. Pollett. The Imperial claim (Lot 3025), adjoining to the southeast, was Crown-granted to G.F. Whiteman in 1898. The Victor, Emerald, and Porcupine claims (Lots 2906-2908 respectively), extending south from the Imperial, were Crown-granted to P. Thompson, A. Johnson & associates in 1902. The Sandaulphon, Gorgina, Champagne, and Rio Grande Fr. (Lots 4639, 5130-5132 respectively), located adjoining to the north of the Nevada claim, were Crown-granted to The Rio Grande Gold and Silver Mining Company, Limited Liability in 1901; the Champagne claim in later years became part of the Porcupine property.

In about 1907 the Rio Grande Fr., Gorgina, and Sandaulphon claims were purchased at a tax sale by O. and C. Anderson, of Ymir. The Nevada and Imperial claims were acquired in 1911 by Messrs. Grobe and MacLeod, of Ymir. Development work to 1915 totalled about 98 metres of drifts and crosscuts in 4 adits. Work on the Rio Grande Fr. included about 122 metres of drift and crosscuts in one adit; a lower adit was being extended in 1915. Further development work was reported in 1917. The Imperial claim was re-Crown-granted in 1918 to D.E. Grobe. Sampling was reportedly carried out on the property in the 1930's by Wesko Exploration and Development Company, Limited. In 1937 some development work was carried out by David Grobe of Spokane; a small shipment of ore was reported under the name of J.A. Armes, of Vancouver, as owner.

The property was bonded in 1926 by R.K. Waite for Cleveland Ohio interests. Cleveland Mines, Limited was incorporated in September of that year but no activity was reported other than the shipment of a few tons of ore. Intermittent prospecting and development by Haukedahl and Peterson continued until about 1930; work to date included numerous open cuts and about 130 metres of underground work in 5 adits.

Late in 1937 the property was optioned by C. Wolf and E.H. Carlson, of Spokane, who carried out 84 metres of drifting the following year. A Spokane syndicate, Maple Leaf Gold Mining Co. Inc. was organized to continue the development work. In 1939 underground work totalled 49 metres of drifting and 18 metres of crosscutting; an additional 38 metres of drifting was reported in 1944. The company in 1948 held the Ambassador, Easter, and Sun Fr. claims in this vicinity. An adit was driven during the year and a small amount of ore shipped. Duval International Corporation held the Porcupine and adjacent claims in 1968; geological mapping and sampling was reported. The Porcupine, Franklin, and Champagne claims were owned in 1976 by I. Urquhart, c/o Cochrane Consultants Ltd. Geological mapping, and sampling of trenches, dumps, and adits was reported in 1976 and 1978.

The Nevada showings are located on the south side of Porcupine Creek, about 3.2 kilometres southeast of Ymir. The Porcupine showings (082FSW063) adjoin to the northeast.

The area is underlain by metasediments of the Jurassic Ymir Group intruded by Middle to Late Jurassic granite and granodiorite of the Nelson Intrusions.

Two types of mineralization occur on the property: 1) veins and 2) shear zones.

A number of irregular quartz veins strike 050 to 080 degrees and dip 60 to 75 degrees south. The veins occur at and near the margins of the intrusives, hosted mainly in schist and argillaceous quartzite. The veins are 15 to 75 centimetres wide and contain quartz with sheared or schistose wallrocks. Mineralization consists of scattered patches and disseminations of fine-grained pyrite, galena, sphalerite and common limonite.

Shear zones are developed along a north trend of about 40 degrees, with dips in the order of 80 degrees southeast. The shears are up to 3 metres wide and contain stringers of quartz in sheared wallrock. Mineralization is sparse and includes galena, sphalerite and pyrite. Silicification is locally developed at and near granite contacts. Gold and silver values are low and sporadic.

A shipment of 9 tonnes in 1937 contained 62 grams of gold, 1773 grams of silver, 546 kilograms of lead and 381 kilograms of zinc.