Not all visionary plans are good plans.
In 1970, two guys with connections to UNL convinced themselves that the Missouri River Megalopolis needed an enormous international airport. They put the development potential for the Lincoln-Omaha-Sioux-Falls-Kansas-City region on par with coastal California and New England.
To speed contiguous urban connection between Lincoln and Omaha, the pair latched onto an idea floated by the US Army Corps of Engineers to dam the Platte River to create a huge lake out of Ashland. A new city would form around the lake. Lincoln and Omaha would be linked by sprawling new development.
The plan was published on thick glossy paper in a 78-page book and included many detailed drawings and other supporting documentation. Here is the layout for the runway.
Plenty of room for any plane to takeoff or land. I love how the Boeing 747 requirements are based on advanced data. (That iconic plane entered service the same year as the airport plan was published.)
The large lake and park would also provide excellent sound buffering for our supersonic planes.
These guys.
The Death and Life of Omaha 