How do they make the gigantic piles of rocks you see at construction sites? There’s some construction taking place near me and the pile of small rocks and dirt has to be a good 50+ feet tall to the very top, and its like mountain shaped. How does that happen? Does the bulldozer just keep pushing it all together and it keeps getting taller? Doesn’t it become a safety hazard for it to all collapse and bury the bulldozer? Im very confused about it, the pile in question seemed to have appeared overnight.
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We have [piles of rocks](https://upload.wikimedia.org/wikipedia/commons/a/af/All_Gizah_Pyramids.jpg) that have been stable for a lot longer than most construction projects the shape is naturally the most stable. It’s probably not a smart idea to go climbing a randomized pile of rocks until its had a while to really settle into the shape but the [shape a pile makes](https://images.unsplash.com/photo-1518281361980-b26bfd556770?ixid=MnwxMjA3fDB8MHxzZWFyY2h8Mnx8aG91cmdsYXNzfGVufDB8fDB8fA%3D%3D&ixlib=rb-1.2.1&w=1000&q=80) as particles are dumped on it is pretty uniform. Just a question of how well the bits stick together or flow around each other to decide how steep the side is. (I think others have covered what machine may have created the pile exactly.)
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