No. That is not correct. Remember we are dealing with a TNC-S system here, not TT. The fault current thus flows back through the DNO, s neutral (largely) and not down through earth. Assuming there is a PME at the lamp post (100 ohms) where the fault occurs than that is simply an extra circuit through which current will flow. But the entire voltage present at the DNO, s rod will be dropped across it just like it would with any other earth electrode here. So not only will there be no dangerous voltage at the "halfway point",(an unspecified distance) there will in fact be no dangerous voltage 10 feet from the electrode as it will have been dropped in its entirety across the (presumed) 100 ohm resistance of the rod
Well if you are talking about when there IS multiple rods etc etc, then of course it ties the local ground to the substation earth.
That's EXACTLY what the calculations I provided shows.
But the description i gave where the voltage distributes along the ground is the situation where there is no multiple earthing - it illustrates the point!!!
I showed the example of large voltage differences due to not having multiple earthing - a potentially large voltage difference if you don't have the earthing in place, compared to low voltage in the event of multiple earthing in place.