Denver International Airport is twice the size of Manhattan and is the second largest public works project in the world, second only to the Chunnel linking England and France. By land area, it is the largest US airport and third largest in the world. One hundred and ten million cubic yards ( yd.³) of earth were moved during the building of the project; this is equivalent to one third the amount of earth moved in building the Panama Canal.
The airport has 17 mechanical rooms, over 1 million pounds of ducts and 40 miles of piping. The airport also has the largest jet fuel distribution network in the world. Runways are spaced 4,200 feet from each other. The airport has electric powered subway lines that move up to 6,000 people an hour. The airport moves about 75 million passengers a year.