Your Most Autistic /sci/ Ideas

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Have you ever had outlandish or borderline absurd ideas for engineering projects? Post them here.

A recurring idea of mine involves a geoengineering megaproject that involves digging a canal to divert a small (around 5 to 10 percent of flow) portion of the Colorado River in order to flood the area that is now Death Valley national park and create a massive new manmade lake. The canal must be routed to have minimal impact on nearby Las Vegas; some of it may have to be underground.

Essentially I would try to recreate a series of prehistoric lakes that existed in the area 20,000 years ago. Runoff would eventually flow south to the Salton Sea (largely eliminating the ongoing salinity crisis there), before finally reaching the Pacific Ocean.