Devonian to Permian Knob Hill Group rocks are intruded by Cretaceous granodiorite of the Nelson Intrusins. A mineralized vein is exposed along 40 metres of strike length at 270 degrees. The mineralization consists of pyrite, chalcopyrite, galena, sphalerite, native silver, magnetite and possibly gold in a gangue of quartz. Earlier reports indicate the host to be a fine-grained dark green biotite schist intruded by narrow porphyry dikes.

In 1896 it was reported that a shaft had been sunk 10.7 metres and rich silver-gold ore had been struck. In 1898 a plan was being made to run a tunnel in 91 metres. The Combination was Crown-granted in 1899 to the Combination M & M. Co. Some work was, or recently had been, done on the Combination in 1903. The Ebolt Mining Company commenced work on the Combination in 1922 and their tunnel was in 2.7 metres. In 1923, a vein was intersected by the crosscut tunnel at 64.6 metres from the portal. It was reported at the time that the vein in the old shaft (at a higher elevation) should have been intersected at about 91 metres and that faulting had moved the vein closer than expected. The vein was drifted on for 13 metres to the east and 20 metres to the west.

In 1923 and 1924 a total of 11 tonnes of ore were produced from which 60,340 grams of silver, 653 grams of gold and 722 kilograms of lead were recovered. It was reported that 1.8 tonnes were shipped in 1925 but recovery values were not reported. Underground development recommenced in 1938 but apparently little was actually done.

In 1967, owner E.D. Campbell did some surface preparation and portal clearing. In 1970, Campbell rehabilitated the mining road and shop building and installed some machinery. T.D. Klemens was the owner who had the property prospected in 1986 with follow-up work in 1987 consisting of 16 rock and 49 soil samples.