okay so i'm not sure how accurate any of this is since it's overlaying sun angles over a photo that is very likely not taken from a 90deg overhead angle to the bomber... and the scale of the image may be distorted a little...

I discovered on google earth that the image was taken May 16th.

I used this site http://shadowcalculator.eu/#/lat/39.02397754136213/lng/-93.6... to draw a fence around the bomber and defined the "structure" to be an arbitrarily tall height until the sun angle lined up.

Then I lowered the height until the sun angle touched the location of the shadow and I came to an altitude of 1100ft / 335.28m (rough height of the "structure")