I am certain that this saguaro was standing upright on Wednesday evening. By Friday it had fallen over. Fortunately, no one was messing around under it when it fell.
Pretty much rotted at the base. Quite possibly a transplanted saguaro which was buried too deep, although it seemed healthy enough until recently.
Several arms on one side - perhaps they may be salvagable.
Here's a saguaro cross-section. It is high up near the end, so the circle of ribs is hardly noticable. In case you ever wondered what a saguaro looks like on the inside, here it is...
Four arms - the very top had a hole so close to the top that it wasn't worth trying to save.
They are planted in a lightly shaded structure in order to try to get them to root out.
We'll know if they made it in about 6 months to a year.