Megaprojects

American megaprojects: the bridges, dams and tunnels that shouldn't have worked. Every episode in this hub takes one structure and asks the engineering question behind it. Why is it there, what nearly broke it, and how did the people who built it solve problems nobody had solved before.

The first batch is a series, Megaprojects of America, in seven parts: Old River Control, the Chesapeake Bay Bridge Tunnel, the Interstate Highway System, the Mackinac Bridge, Hoover Dam, the Lake Pontchartrain Causeway and Grand Coulee Dam. Part 1 is live now. Each episode page carries a timeline, the key numbers, a map and the full list of sources, so you can check every fact we put on screen.

Start with Old River, the Louisiana structure that keeps the Mississippi from changing course, then follow the series in order. Pure engineering, no politics.