A & C Pit closed before ww2 and they may just have timbers over the shaft.
Maybe the Council need asked 'are these shafts still safe'.
'A' pit shaft has grass land over it and probably why it wasnt built over.
'B' Pit shaft is amongst Housing north of St Oswalds Rd.
'C' Pit shaft could be in a steet called Ashwood Croft off Ellison St.
Very deep sink holes if they ever collapsed