[TowerTalk] Crank-Up Tower Base Question

[RICHARD SOLOMON]

I plan to install an LM-470 in the near future. The base specs are 3'6 X 3'6 X 7 feet. A note
on the drawing mentions ..."undisturbed soil"... . The Backhoe Operator tells me the hole he
digs will be more like 6' X 6' and the will use concrete forms to reduce it to the required size.
After the forms are removed, they will backfill the hole.
 
What do you folks think of that plan ? 
 
Thanks, Dick, W1KSZ/7