1930-1946 Hartley Main Collieries Ltd 1947-1955 National Coal Board
Hartley (b)
aka Hartley (d) or New Hartley
Coal Mine
Worked from 1930 to 1959
Jan 1st, 2024 from NMRS by Buddle-Bot
| Durham & Northumberland Coalfields | |
| New Hartley | |
| 55.087573, -1.529945 | |
| NZ 3010 7712 | |
| Private Land | |
| 24m | |
| #23,933 |
Gloria - 596m- Seaton Delaval, Engine Pit - 721m
- Seaton Delaval, Relief Pit - 743m
- Seaton Delaval, E & F Pits - 754m
- Seaton Delaval, C & D Pits - 767m
- Seaton Delaval - 802m
- Seaton Delaval, A & B Pits - 807m
- New Hartley, Hester Pit - 1,075m
- Seaton Delaval, Hastings Pit - 1,132m
- Cramlington, Lamb Pit - 1,728m
- Low Cramlington, Engine Pit - 1,761m