Galvanized Steel Culvert 5

https://getmetalculvertindex.ironwoodscope.com/posts/why-metal-culvert-is-a-durable-choice-for-drainage-and-infrastructure-projects

A galvanized steel culvert handles the flow of water under a road or driveway—its corrugated surface adds strength and directs runoff during heavy rain. The zinc coating resists rust, though our typical climate and soil conditions can wear it down over decades. You might spot one where a stream passes under a rural lane or in a drainage ditch, and its metal shell shows the wear of years of water and grit moving through.