The WINN showing is a postglacial uranium concentration in lake-bottom sediments of an unnamed pond. It is located approximately 4.5 kilometres northwest of the Kelowna airport.

This is one of many young uranium occurrences discovered by D. G. Leighton & Associates Ltd. in the late 1970s. Work prior to the uranium moratorium in 1980 consisted of auger sampling.

The area is underlain by siltstone and argillite of the Devonian-Triassic Harper Ranch Group which is intruded by granodiorite of the Jurassic Okanagan Intrusions and overlain by trachyte and trachyandesite of the Eocene Kitley Lake Member of the Marron Formation, Penticton Group.

The occurrence is recent, having formed from the interaction of uranium-rich groundwater with unconsolidated material containing organics or clay. This process is believed to still be taking place. The source of the uranium is thought to be the surrounding igneous and volcanic rocks, where groundwaters rich in carbonate and alkali ions have leached labile uranium from fresh rock exposed after glaciation.

Uranium enrichment occurs over an area measuring 12,000 square metres and averages 0.0084 per cent uranium (Culbert, 1979). The uraniferous layer lies 2.0 metres below the surface and has an average thickness of 3.0 metres (Culbert, 1979). Within that layer a 0.5-metre section averages 0.0117 per cent uranium (Culbert, 1979).