The film follows the timber industry from logging through to export
The sawmill is in Chemainus, this version was built in 1924. At the time the sawmill has owned by the Victoria Lumber Company. It is 1946 that the sawmill came under the control of HR MacMillan.
Given this is Chemainus the logging operation is most likely a Victoria Lumber Company show.
2:10 - Spar Tree being made
3:10 - buckers sawing a tree to length
3:16 - steam donkey in operation
3:43 - skidway to the water
4:33 - Logging railway
4:52 - sawmill and log dump
8:10 - ship being loaded
The film was made by the Canadian Government Motion Picture Bureau
Narration David Gwydyr
Narrator Rupert Caplan
Original source footage at this link:
https://youtu.be/lYu6TP9d-tc