Both OGC mines are in the South Island, Reefton being on the other side of the Southern Alps, and Macraes being just north of Dunedin, a few hours drive away. There has been no mention of damage much further out from the Epicentre yet, and as it was a shallower earthquake it's very unlikely that Macraes infrastructure was affected, but they'd have felt it. We'll wait and see with the press release.