20 years ago, my sister had that done to the pond behind her house,,
the one acre pond was doubled in size,,,
They had a guy with a dragline excavate it out,,,
the counterweight on the dragline was multiple pieces,, and weighed 90,000 pounds,, JUST the weight of the counterweight.
Well, one night, the operator did not back away from the pond far enough,, the earth gave away,, the dragline flipped on its side, into the pond,,,
Luckily, the dragline owner knew some recovery specialist from Norfolk VA,,
the guy drove up with a one ton truck full of cable, and pulleys,,
They buried a 2 foot diameter, 20 foot long hickory that was cut from the farm they were on,,
using that as a deadman, buried over 15 feet deep,, the farm's 4WD JD tractor was hooked to the cable,,
and the tractor went close to 1/8 of a mile, pulling the cable,,
IIRC, the cable was a 6 way lay,,, that farm tractor never spun,, it simply pulled the giant dragline out of the pond, and flipped it back on its tracks,,
So, the moral of the story is,,,
DO NOT park the excavator on loose soil over night,,,,
