Subcategories
This category has the following 10 subcategories, out of 10 total.
0–9
- Tunnels completed in 1970 (6 P)
- Tunnels completed in 1971 (5 P)
- Tunnels completed in 1972 (10 P)
- Tunnels completed in 1973 (6 P)
- Tunnels completed in 1974 (3 P)
- Tunnels completed in 1975 (12 P)
- Tunnels completed in 1976 (3 P)
- Tunnels completed in 1977 (3 P)
- Tunnels completed in 1978 (5 P)
- Tunnels completed in 1979 (2 P)