I think the original agreement with Freewest & SPQ allowed KWG to earn a bit more interest in BT by doing work, which KWG did, so earning a greater than 30% interest.

The split was originally something like FWR 40% & SPQ & KWG 30% each. So, if the merger of SPQ & KWG had gone through, the combined co. would have had 60%, but instead SPQ sold out to CLF, so they had 40+30, or 70%