▁where ▁the ▁coal ▁se ams ▁dip ▁at ▁ 1 ▁in ▁ 4 . 5 ▁towards ▁the ▁south . ▁Sh aft ▁s inking ▁comm enced ▁in ▁ 1 9 0 8 ▁and ▁proved ▁difficult ▁because ▁of ▁water ▁and ▁quick s and . ▁The ▁company ▁contract ed ▁Han iel ▁and ▁Lu eg ▁of ▁Düsseldorf - D üss elt al ▁to ▁sink ▁the ▁sh aft . ▁The ▁W ors ley ▁Four ▁Foot ▁mine ▁was ▁reached ▁in ▁April ▁ 1 9 1 0 ▁and ▁more ▁water - b ear ing ▁rock ▁was ▁anticip ated ▁before ▁the ▁Ar ley ▁mine ▁was ▁reached . ▁No ▁ 1 ▁pit ▁was ▁s unk ▁to ▁ 8 9 0 ▁yards ▁primarily ▁to ▁win ▁coal ▁from ▁the ▁T rench er bone ▁mine ▁and ▁No ▁ 2 ▁pit ▁was ▁ 8 3 3 ▁yards ▁deep . ▁The ▁sh aft ▁was ▁ 2 3 ▁feet ▁in ▁diameter . ▁The ▁C rom b ou ke ▁and ▁R ams ▁mines ▁were ▁inter se cted ▁by ▁the ▁sink ings . ▁F ired amp ▁was ▁a ▁problem ▁in ▁the ▁new ▁work ings ▁and ▁vent ilation ▁was ▁a ▁problem . ▁The ▁head ge ar ▁of ▁No . 1 ▁pit ▁surv ives , ▁it ▁is ▁made ▁from ▁wr ought ▁iron ▁lattice ▁g ird ers ▁with ▁riv et ed ▁pl ates ▁at ▁the ▁joint s ▁and ▁one ▁small ▁and ▁two ▁large ▁whe els ▁mounted ▁at ▁the ▁top . ▁It ▁is ▁nearly ▁ ▁high ▁and ▁was ▁built ▁by ▁Head ▁Wright son ▁of ▁Stock ton - on - Te es ▁and ▁completed ▁by ▁