" writes:

I'm slowly converting my tiny suburban back area into a garden.

Progress is slowed because of a chronic problem of landscapers
dumping unused overburden on it.

Are these landscapers you've asked to come and work on your
property?

I understand why, because our local landfill charges $200 a yard
to dump the stuff. (Ask Me How I Know This.)

I shovel and vacuum the dirt up off the clay, but a month later,
I'm gifted with another half-a-yard of fill dirt, neatly
distributed over the surface and pushed into the crawlspace under
an outbuilding.

Every week for the last decade, I've filled my garbage can
full of this soil but the amount in the back yard is a constant,
not a variable. The next larger trash can would cost me an
additional $30 a month, which I don't have to spare.

I have a Freecycle ad offering this clean fill but I have
no takers.

How would you solve this problem?

The rest of your post makes no sense to me.
Are these your landscapers doing something you don't like or
some random landscapers illegally dumping soil on your land?

Or are you just having us on?

--
Dan Espen