There's always been something off about projections around the need for the project.  All the upgrades to power facilities on the Columbia have been completely ignored when calculating power generated here.  BC Hydro finally invested in the Waneta project, (which did come in on time and budget for its partners) after not being interested while the work was being done.  It's not worth 7 billion (at minimum) to keep a couple of thousand workers in camps where they do very little for the local or the BC  economy when they take their pay cheques home to their provinces or countries of origin when their work is done. When the dam is complete, the Peace will slide back into a bust cycle, minus some agricultural activity
I was a kid when the WAC Bennett dam was completed, and the old farmers used to complain that the region might as well be part of Alberta, because BC was only interested in it when they could scoop money out of it.  I don't know that much has changed.