Yes, I've seen this name used by both backroadstatus.com & BRMB. 
A yellow signboard at a junction partway up had the names "North Talc Main" / "Old Spur" and looked relatively new in Sept/24, but there was no sign at the base of the road.

Agreed that it doesn't show up in the BC Gov't map, so feel free to remove the name if you feel it doesn't represent current usage.