Utility Pole Casings allow for large utility transmission poles or commercial sign structures to be stabilized in sandy or moist soils. As a foundation, Large Diameter Pipe is introduced vertically as a hole is dug in unstable soils to hold back mud and prevent cave in. Arcadia Culverts stocks and sells Corrugated Metal Pipe, and HDPE Corrugated Plastic Pipe for use as Utility Pole Casings.