The property is located at 850 metres elevation on the east side of Kaslo River, 7 kilometres northwest of Kaslo.

The showings were discovered by A.J. Curle, of Kaslo, in 1907 but not being of economic value lay dormant until July 1917 when he staked 6 claims, the Manganese, Manganese 1-4, and Cantan. Two claims Manganese (Lot 10673) and Manganese No. 1 (Lot 10674) were Crown-granted to Mr. Curle in 1925. The No. 1 deposit, on the Manganese claim, was evaluated by some 85 test pits and trenches. On the No. 2 deposit (Manganese No. 1 claim) Mr. Curle sank a large number of test pits. A trial shipment of 27 tonnes (490 sacks) of ore was made in 1917 by Mr. Curle and A.G. Larson, of Spokane. In 1918 the property was under lease to Col. F.B. Millard, of Spokane, and 15 car-loads of ore were shipped by the Kaslo Nakusp Railway which bordered the lower edge of the property. The high water content of the first shipment necessitated the installation of a dryer but results were not entirely satisfactory and work ceased in October of that year. Mr. Curle made further shipments in late 1918 and 1919. The analysis of samples sent by Mr. Curle to the Mines Branch, Ottawa, in 1940 indicated the sample material was of low quality and didn't warrent further testing. Curle estimated from 700 to 800 tons averaging 30 per cent manganese remained on the Manganese claim following the 1918-19 production. On the Manganese No. 1 claim, Hanson, 1932, estimated 2270 tons; and analysis of this material gave 31.57 per cent manganese, 12.03 per cent silica, 3.75 per cent limonite.

The area is underlain by greenstone (mafic volcanics), chlorite and hornblende schist and gneiss of the Permian Kaslo Group. Three manganese deposits have been located: a lower deposit located just above the old railway bed is exposed for 21 metres along the slope; two deposits occur on a single terrace or bench some 90 metres above the railway bed and consist of the No.1 deposit covering about 20,000 square metres and the No.2, located about 350 metres to the north of the No.1, and covering about 10,000 square metres. Within these areas, the bog manganese varies from less than 2 centimetres to 1 metre in thickness. The deposits consist of different forms of wad or bog manganese interstratified with, but generally distinct from, various amounts of hydrous iron oxides, calcareous tuffa or sinter and layers of clay-rich subsoil.