If you don't have access to a gantry crane or similar, how about calling in a large boom wrecker? The big wreckers usually have a boom arm with a pretty good reach and height, and should be able to easily handle the dump.
I would think it would be fairly cheap, since it won't take long, and they can do it as fill work. Guessing $150.00 or less. And in my experience, the drivers usually get a kick out of "different" types of jobs.
Just an idea.
-Michael
