Got it! 45°51'51.41"N 122°45'4.13"W It's about 2 miles as the crow flies from Saint Helens, Oregon but it's in Washington state. Not at all where I thought it was going to be!
Well what do you know, it is too. Just a ways north of Portland, so I wouldn't have found it for a rather long time. And that plane still has no shadow (because of the way the photos are stitched together, the grid where the shadow would fall was photographed when there was no plane in the neighbouring grid). Well done!
