During the construction of the M66 near Walmersley in 1976 a long-forgotten shallow coal mine dating back to at least the beginning of the 19th century was uncovered.
We have prepared a short video of the survey photos with an explanation of how the coal was mined. Click on You Tube http:/​/​youtu.​be/​m-​lJ6WMG-​rE to see the presentation 'On discovering an ancient coalmine'.