| Date - Field | Portugal - Waterways |
2008 January Waterways | 210 km (on Douro River from Porto) (2006) |
2007 January Waterways | 210 km (on Douro River from Porto) (2003) |
2006 January Waterways | 210 km (on Douro River from Porto) (2003) |
2005 January Waterways | 210 km (on Douro River from Porto) (2003) |
2004 January Waterways | 820 km note: relatively unimportant to national economy, used by shallow-draft craft limited to 300 metric-ton or less cargo capacity |
2003 January Waterways | 820 km note: relatively unimportant to national economy, used by shallow-draft craft limited to 300 metric-ton or less cargo capacity |
2002 January Waterways | 820 km note: relatively unimportant to national economy, used by shallow-draft craft limited to 300 metric-ton or less cargo capacity |
2001 January Waterways | 820 km
note: relatively unimportant to national economy, used by shallow-draft craft limited to 300 metric-ton or less cargo capacity |
2000 January Waterways | 820 km navigable; relatively unimportant to national economy, used by shallow-draft craft limited to 300 metric-ton or less cargo capacity |