What is the standard process for checking a wooden pole for decay?

The standard process for checking a wooden pole for decay involves excavating about 12 to 18 inches below ground level. This depth is important because it allows access to the area where the wood is most susceptible to moisture and deterioration, which typically occurs at or slightly below the ground line. By examining this depth, one can assess the condition of the pole and determine if there are any signs of rot or decay, which could compromise its structural integrity.

Drilling a 1-inch hole, while it might provide insight into the central integrity of the wood, may not give a complete picture of the decay that can occur around the base of the pole where it interacts with soil and moisture. Similarly, excavating 6 inches or 24 inches below ground level may not be sufficient for a thorough inspection, as some decay may extend deeper than 6 inches, while going too deep might not provide relevant information about the condition of the surface area where decay is most likely to begin.