Subcategories
This category has the following 10 subcategories, out of 10 total.
0–9
- Tunnels completed in 1950 (3 P)
- Tunnels completed in 1951 (2 P)
- Tunnels completed in 1952 (4 P)
- Tunnels completed in 1953 (5 P)
- Tunnels completed in 1954 (2 P)
- Tunnels completed in 1955 (3 P)
- Tunnels completed in 1956 (7 P)
- Tunnels completed in 1957 (3 P)
- Tunnels completed in 1958 (1 P)
- Tunnels completed in 1959 (3 P)