The KELLY occurrence is located on the north side of Trout Creek, approximately 4 kilometres southwest of Summerland.

The area is underlain by highly fractured and altered granite of the Jurassic Okanagan Intrusions, which is unconformably overlain to the east by a succession of clastic sediments, ash flows, and alkaline lavas of the Eocene Penticton Group, Marama and White Lake formations. The Trout Creek and Summerland fault zones may be part of a major Tertiary detachment zone along which the Okanagan granitic and Summerland volcanic complexes have been decoupled, by extensional tectonics, from the Monashee foreland to the east.

Mineralization exposed at the KELLY occurrence includes galena, tetrahedrite, sphalerite and pyrite in a quartz-carbonate altered shear zone.

The property was first developed under the name "Last Chance" in 1906 when a 36.5-metre decline was driven along a silicified shear zone. Two "pay streaks" were identified, 4 centimetres and 5 centimetres wide respectively.

A high-grade grab sample assayed 3428 grams per tonne silver and 500 kilograms per tonne lead (Minister of Mines, Annual Report 1906, page 172). Limited production did took place during the period 1926 to 1927 when it became known as the KELLY mine. A total of 2 tonnes of ore were mined yielding 2769 grams of silver, 69 kilograms of lead and 63 kilograms of zinc (Minister of Mines Annual Report, Index No. 3, page 202).