▁coal ▁was ▁then ▁carried ▁out ▁through ▁an ▁ad it ▁in ▁Mut ten al . ▁This ▁ad it ▁was ▁added ▁to ▁the ▁west ▁of ▁the ▁Mut ten bach s . ▁ ▁The ▁ad it ▁was ▁later ▁extended ▁further ▁into ▁the ▁M aus g att . ▁In ▁ 1 8 3 0 , ▁the ▁Wilhelm ▁sh aft ▁was ▁extended ▁to ▁further ▁depth s . ▁In ▁ 1 8 3 5 ▁it ▁reached ▁the ▁Gö pel sch acht ▁Wilhelm ▁which ▁intersection ▁with ▁the ▁t unn els ▁at ▁St . ▁Johannes ▁Er bst ol len . ▁The ▁sh aft ▁now ▁had ▁a ▁depth ▁of ▁ 5 7 ▁L ach ter . ▁Later ▁in ▁that ▁same ▁year ▁the ▁Wilhelm ▁sh aft ▁was ▁equ ipped ▁with ▁a ▁Hor se ▁mill . ▁The ▁subs id ized ▁coal ▁was ▁then ▁transport ed ▁by ▁day ▁to ▁Berg isches ▁Land . ▁By ▁night , ▁the ▁drivers ▁provided ▁supplies ▁for ▁the ▁construction ▁of ▁the ▁mine ' s ▁guest house , ▁" Z ur ▁alten ▁Tür " ▁( To ▁the ▁old ▁door ). ▁ ▁The ▁waste ▁water ▁(" W asser l ös ung ") ▁was ▁now ▁carried ▁out ▁through ▁St . ▁Johannes ▁Er bst ol len . ▁Later ▁in ▁the ▁same ▁year ▁the ▁supports ▁above ▁the ▁tunnel ▁were ▁improved . ▁In ▁ 1 8 3 6 ▁construction ▁of ▁supports ▁for ▁the ▁Ger hard ▁sh aft ▁had ▁begun ▁to ▁be ▁installed . ▁ ▁The ▁Ger hard ▁sh aft ▁was ▁located ▁ 3 0 0 ▁meters ▁to ▁the ▁east ▁of ▁the ▁Wilhelm ▁sh aft ▁and ▁was ▁pushed