In Four Ways West's GN Equipment Color Pictorial vol. 2, p. 77, there is a picture of a GN "well" flat, #60029 from series 60000-60032, with a propeller load being unloaded in Seattle c. WWII. I don't have drawings of the flat (Staffan Ehnbom might), but proportions relative to workers on the car suggest the bottom of
the well may be 30-33" below the deck. The four-bladed prop appears to be 12-15' in diameter.
