What does this number measure?
The operator gives a total length of 7 919 m for the combined concrete, rockfill and earth structures. This is not the concrete section alone: these parts are brought together in the horizontal reference.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Representative or rounded dimensions according to the source; these are not a confidence interval.
Itaipu: interpreted downstream view of the complete system, schematically unfolded to make its total length readable, with long earth and rockfill embankments, the tall concrete section, penstocks and spillway. The marked width compares the 7 919 m of the entire dam system, not just the central concrete section. Water and foreground are excluded; perspective and architectural details are illustrative.