The "ground" is bone dry and very resistive up here. Given that a fat wire looks like an inductor at high frequency, and that lightning and surges are usually very high frequency-like events, these bonding methods seem ineffective.

When we run a motor with a VFD, we use special layered-shielded cable now. It has a fat ground wire for grounding against shorts, but it also has layers of braid, foil, and metal conduit shielding (all plane-like) to mitigate high frequency noise from the switching. The shielding is a low impedance path at the higher frequencies- each type has its favorite frequency band where its impedance is lowest, and they overlap.

The grounding methods for buildings seems to be all wire-like or inductor-like.

Pipes: look like wires/inductors Rebar: look like wires/inductors, though in a grid they may do better grounding wire: is a wire/inductor grounding rods: look like wires/inductors

Does anyone measure the impedance of the ground and grounding system with frequency and with energy?

Matt