Adjoining the original North mine lease to the south was Block 40, the site of operations of Broken Hill Junction North Mining Company Limited, registered at Sydney in 1890. Two of the North mine directors, Alex Campbell and Hal Sheppard were also members of the Junction North board. The company was reconstructed in Melbourne in 1901, and again in 1906, when the name was changed to Broken Hill Junction North Silver Mining Company No Liability.

Much of the company's resources were spent on costly metallurgical experiments, occasioned by the difficulty in treating the hard rhodonitic ores. There was a steady procession of mine managers, and in 1907 due to pressure exerted by a group of share- holders, control of the company reverted to Sydney.

By 1911 mine production had reached 76 000 tonnes per year, but because of the shortage of miners and decreasing ore reserves the position deteriorated. In 1912 the company became Junction North Broken Hill Mine No Liability.

During World War I the Junction North ceased operations for three years. Dwindling ore reserves were supplemented by the purchase of slime dumps and residues obtained from other mines, for treatment in the Junction North concentrating plant. A small 'puffing billy' engine hauled trucks of material at the rear of the principal mines to the Junction North ore bins. Mining of ore was also carried out at the old Pinnacles field, 16 km from Broken Hill.

The Junction North company ceased operations in 1928 and went into voluntary liquidation. It was acquired by North Broken Hill Limited at public auction for $5500 in 1931. Total ore raised by the company from 1897 to 1928 amounted to 1.3 million tonnes. Shareholders received only $342 000 during the life of the mine.