culvert steel 6

https://getcorrugatedmetalpipecmpzone.solsticebrief.com/posts/why-corrugated-metal-pipe-cmp-remains-a-top-choice-for-drainage-and-infrastructure

Culvert steel is the durable, corrugated metal often used to build those big drainage pipes you see under roads and driveways. It's thick enough to handle the weight of traffic and the constant flow of rainwater, yet it can be cut and shaped on-site to fit specific project needs. I've seen crews install it in hours without any special equipment, just careful measurements and a few bolts. It's not the prettiest material, but for moving water away fast and reliably, it's hard to beat.