| Name |
Comp |
Yards |
Open |
Closed |
Portal |
Portal |
Link |
| Oakamoor |
Nth Stf |
488(g) |
1849 |
1965 |
 |
 |
 |
| Oakenshaw |
L&Y |
67 |
1847 |
1965 |
|
|
 |
| Oare |
Dav |
~28 |
1916 |
1919 |
|
|
 |
| Oatlands [Pica] |
C&WJ |
55(g) |
1882 |
1938 |
|
|
|
| Ocker Hill [Wednesbury] |
LNW |
88 |
1863 |
1981 |
|
|
|
| Old Lane (North Bridge) |
GN |
402 |
1878 |
1959 |
|
|
|
| Old Warden |
Mid |
882 |
1857 |
1964 |
|
|
 |
| Oldham |
OA&GB |
59 |
1861 |
1967 |
|
|
|
| Oldham Tunnel was originally 152yds but later cut back to 59yds. |
| Oldland |
A&G |
~66 |
1831 |
1864 |
|
|
|
| Orangefield (Wellington St) |
G&A |
~150 |
1869 |
1991 |
|
|
 |
| Otley |
NE |
~89 |
1865 |
1965 |
|
|
|
| Oxendon Down |
LNW |
462 |
1859 |
1984 |
|
|
|
| Oxendon Up |
LNW |
453 |
1879 |
1984 |
|
|
|
| Oxspring Up |
GC |
558 |
1854 |
1981? |
|
|
|
|