This is the dirt mover they used when building dams in the 40s and early 50s. I have some home movies that the Romains took that include some dam building. It's one of my more popular videos. The dam building starts at the 5 minute mark [ youtube video ] The first part of the video is plowing etc and in between you'll see a troublemaker.

Towed Cable Scraper
https://classicdozers.wordpress.com/towed-scrapers/
https://contractormag.co.nz/classic-mac ... d-scraper/