Copper bonded earthing rods might be reused after excavation, but there are many factors that determine whether reuse is sensible and safe. The first consideration is the state of the rod and its copper coating when unearthed.
When being excavated, copper bonded earthing rods can be subjected to mechanical stress, abrasion, or impact, which can weaken the integrity of the copper la... https://www.pioneerpowers.com/copper-bonded-earth-rod.php