The Hartney occurrence is located north of Bartlett Creek, at about 1350 metres elevation on the northwestern flank of Idaho Peak. New Denver, British Columbia is located 3 kilometres to the northwest.

The Hartney occurrence is found on the former Hartney Group, consisting of the seven Reverted Crown and Crown grants Hartney (Lot 4864), August Flower (Lot 4865), Edith (Lot 4867), Hunter (Lot 4868), Hub & Hub (Lot 4869), Edith Fr. (Lot 4870) and Kingston (Lot 4871). The occurrence was first discovered in 1897. Workings in five adits consisted of 457 metres of drifts and crosscuts and 155 metres of raises and winzes. Work was conducted by the Hartney Group Mines Company up to 1906. Subsequent intermittent work was conducted by various lessees until 1917 when all work ceased. The property was owned by T. Avison in the 1930s. Ownership was transferred to Santiago Mines Limited in 1946. The two lowest adits were reopened and sampled. In 1951, the New Santiago Mines Limited was incorporated and acquired the Hartney claim group.

Hostrocks of the Hartney occurrence are massive argillite and pyritic, carbonaceous slate of the Triassic Slocan Group.

Galena and sphalerite mineralization are hosted in a quartz- calcite-siderite vein. Cassiterite is reported associated with the sphalerite. Minor pyrite was found coating vugs in the ore. The vein ranges from 2 centimetres to 122 centimetres width and contains brecciated wallrock.

The best ore pitched with the slope of the hillside. Three samples were taken in 1946. The best of these samples, a 15- centimetre chip sample, yielded 285 grams per tonne silver, 3.1 per cent lead, 33.7 per cent zinc, 0.49 per cent cadmium and 0.08 per cent tin (Canadian Mining and Metallurgical Bulletin, October 1946, page 593).

Production records indicate 256 tonnes of ore were mined sporadically between 1900 and 1917. A total of 522,810 grams of silver, 81,876 kilograms of lead and 7900 kilograms of zinc were recovered.