4 6 ▁the ▁city ▁administration ▁lo bb ied ▁the ▁New ▁South ▁Wales ▁government ▁to ▁complete ▁the ▁enc irc lement ▁of ▁the ▁city ▁with ▁further ▁reg ener ation ▁res erves , ▁and ▁these ▁were ▁constructed ▁to ▁the ▁north ▁and ▁east ▁of ▁Bro ken ▁Hill ▁between ▁ 1 9 5 0 ▁and ▁ 1 9 5 8 . ▁The ▁reg ener ation ▁res erves ▁created ▁between ▁ 1 9 3 6 ▁and ▁ 1 9 5 8 ▁now ▁primarily ▁compr ise ▁the ▁current ▁Bro ken ▁Hill ▁reg ener ation ▁area , ▁with ▁minor ▁adjust ments ▁having ▁being ▁made ▁over ▁the ▁years . ▁ ▁Re - ve get ation ▁techniques ▁used ▁ ▁It ▁has ▁in ▁the ▁past , ▁and ▁still ▁is ▁very ▁often ▁mistaken ly ▁assumed , ▁that ▁a ▁plant ing ▁technique ▁was ▁util ised ▁to ▁initially ▁establish ▁all ▁of ▁the ▁reg ener ation ▁res erves . ▁It ▁is ▁correct ▁that ▁the ▁Z inc ▁Corporation ▁tree ▁plant ations ▁of ▁ 1 9 3 6 - 3 7 , ▁separate ▁and ▁relatively ▁small ▁projects ▁located ▁immediately ▁adjacent ▁to ▁the ▁urban ▁area ▁and ▁pip ed ▁water ▁resources , ▁were ▁ir rig ated , ▁and ▁their ▁veget ation ▁established ▁by ▁the ▁manual ▁plant ing ▁of ▁thousands ▁of ▁trees , ▁with ▁salt b ush ▁also ▁being ▁plant ed . ▁However ▁it ▁is ▁clear ▁from ▁the ▁documentation ▁of ▁the ▁time ▁that ▁the ▁reg ener ation ▁res erves , ▁as ▁distinct ▁from ▁the ▁tree ▁plant ations , ▁util ised ▁principles ▁of ▁natural ▁reg ener ation , ▁and ▁not ▁plant ing , ▁to