corrugated metal pipe 6

https://wiki-site.win/index.php/Understanding_Corrugated_Steel_Pipe_for_Modern_Drainage_Systems

A corrugated metal pipe lies half-buried in the muddy ditch, its galvanized surface scarred by decades of stormwater runoff. The zigzag pattern of ridges and grooves, now flecked with rust and crusted soil, channels a faint trickle after the rain. It stretches under the gravel road, a silent, functional artery for the farmland beyond, enduring collapse and neglect.