Encyclopedia
Earthworks
Earthworks - works involving excavation of soil to a depth exceeding 30 centimeters (excluding plowing), driving and sinking piles during construction of all types of objects and structures, underground and above-ground engineering networks, communications, as well as backfilling with soil to a height exceeding 50 centimeters
Source: LAW OF THE MOSCOW REGION dated November 29, 2005 No. 249/2005-OZ
"ON ENSURING CLEANLINESS AND ORDER ON THE TERRITORY OF THE MOSCOW REGION"