That is the same situation we had here years ago. People had burn barrels, when the barrels got full, they dumped them in a low spot as filler. When my kids were little, a new burn barrel meant that they got handed a 22 rifle and they got to shoot holes in the burn barrel so it would drain out the rain water. Talk about some fun! Then some counties had the big roll off dumpsters where people could take their trash for free. Finally enterprising people opened up garbage companies-pick up trucks with side boards and a trailer. Then that morphed into garbage trucks, side loaders where the driver operates controls inside the truck, an arm goes out, grabs the can, dumps it and sets it down. In our area, they use rear loaders, the driver has to get out at every can, get the can, take it to the back of the truck, tip it, then take the can back, get in the truck and drive to the next can.
On our place was 2 layers of trash. One layer was old, from over 60 years ago and contained bits of rusted away metal and broken glass from yesteryear, mostly canning jars and bits of colored glass, ancient car parts, even the twisted back end of an old Studebaker. The 2nd layer was new, from the lazy, nasty slobs who this place got repo'ed from. It contained everything from beer bottles and cans to toilet seats, carpet, shoes, toys, above ground pool parts, anything and everything that a family could consume and throw out.
Cool story, a batch of feeder hogs we had unearthed an old fashioned juice strainer, the glass kind where you twist a half orange over the pointed part and the juice collects in the tray below. It was starting to oxidize and didn't even have a chip on it. I gave it to a neighbor whose house stood on our land when he was a boy, figuring that it belonged to his mother, age 96, who still lives around the corner in the "better" house her husband built 60 years ago. Neighbor lives in a newer brick house built on inherited land from his father. That old glass juicer is now his prized possession.