TOP 10 ACHIEVEMENTS OF THE 20TH CENTURY.

According to an international panel of executives and editors in the construction, aggregates, and ready mixed concrete industries, the top 10 construction achievements of the 20th century (in no particular order) are the Aswan High Dam (Egypt); Chek Lap Kok Airport (Hong Kong); the Chunnel linking the United Kingdom and France; Dwight D. Eisenhower System of Interstate and Defense Highways (U.S.); Empire State Building (U.S.); Golden Gate Bridge (U.S.); Hoover/Boulder Dam (U.S.); Panama Canal (Panama); Sydney Opera House (Australia); and World Trade Center (U.S.).

Selection criteria included a strong impact/benefit to humanity; measurable economic...