The stream is from a Canvec import, so it might well be inaccurate, or no longer accurate.

Looking at aerial imagery of its supposed route, I don't see any obvious water. I do see a ravine or gully that looks like it could carry water. Maybe it's intermittent, or the water from upstream has been redirected? Survey near its supposed source near Glenridge Road and Chine Drive might help. I also wouldn't be particularly opposed to just deleting it since it can't be seen and Canvec waterways aren't particularly credible.