It seems to be near the tourist attraction of "Gold Reef City". "Street address" is more American. It will have been extensive and more hidden underground than a specifically having a "Street Address". I see it mentioned as still operating as it seems to causing problems for "Gold Reef City".
"In the largest basin, the water level has been rising at an average rate of 0.59m per day since July 2009. By end-November 2010, mine water reached a level of 510m below surface at the Catlin shaft of Simmer & Jack. It is expected that the rising water level would reach the surface by March 2013".
“By this time, however, it will have sterilised still exploitable gold reserves located at a depth of less than 400m below surface,” read the report. “Of greater concern is that it will not only have flooded the shallower underground tourist facilities at Gold Reef City, but also compromised the shallow groundwater resource associated with the dolomitic strata located to the southeast of Johannesburg.
It seems if you go to "Gold Reef City" the mine will be around there.