Corrugated Metal Pipe (CMP) 3

https://remote-wiki.win/index.php/The_Practical_Guide_to_Choosing_a_Metal_Culvert_for_Drainage_Projects

Corrugated Metal Pipe (CMP) is the go-to for drainage and culverts, its ribbed design giving it strength to handle heavy loads without being overly rigid. You'll find it under roads and in construction sites, where its durability and cost-effectiveness make it a practical choice for moving water and preventing erosion.