Subcategories
This category has the following 10 subcategories, out of 10 total.
0–9
- Tunnels completed in 1960 (3 P)
- Tunnels completed in 1961 (4 P)
- Tunnels completed in 1962 (5 P)
- Tunnels completed in 1963 (5 P)
- Tunnels completed in 1964 (10 P)
- Tunnels completed in 1965 (3 P)
- Tunnels completed in 1966 (7 P)
- Tunnels completed in 1967 (10 P)
- Tunnels completed in 1968 (10 P)
- Tunnels completed in 1969 (7 P)