[5] The history of football in Trbovlje dates back to 1922, when ŠK Zora was established.

[6] In the same year, the club aroused a lot of interest in this sport among youth working class.

[7] A successful period lasted until 1980, as Rudar won the Republic titles two more times between 1974 and 1979.

[7] With the collapse of Yugoslavia and the independence of Slovenia, all Slovenian teams returned from the federal leagues.

Some of the key players left the club and Rudar was relegated from the newly established Slovenian PrvaLiga in the inaugural 1991–92 season.