You and me both fella... I am currently trying to piece together the Butterley co railway Network which is quite complex as some of it was tramways later superseded by their railway.
The key Butterley pits appear to have been Hartshay upper and Lower, Brittain, western, High holborn, Forty Horse, Ripley and so on.... I am doing an Atlas and Gazeteer of route but its a way off yet. Mixed in with Butterley co pits are some private others etc so a tricky one.
Take High Holborn (Butterley No 5) on the ridge at Codnor Gate, there was a second colliery on that ridge on the codnor castle side (Celebration I think it was) which had an incline to it!
PM me your email and I will try and send you some maps i have done to date 😉
Aaaaaaaaaaaaaaaaaaagh Creeper!!!!!