- How French Drains Work (practical.engineering)
In February of 2017, one of the largest spillways in the world, the one at Oroville Dam in northern California, was severely damaged during releases from heavy rain. You might remember this. I made a video about it, and then another one about the impressive feat of rebuilding the structure. In the forensic report following the incident, one of the contributing causes identified in the failure was the drainage system below the spillway. Rather than being installed below the concrete, each drain protruded into it, reducing the thickness of the concrete and making it more prone to cracking.
- Mendota, Minnesota (Wikipedia)
Mendota (/mɛnˈdoʊtə/ men-DOH-tə) is a city in Dakota County, Minnesota, United States. The name is a mispronunciation of the Dakota word for the location, bdóte, which in Dakota tradition is the center of the world. The word in this use means “the confluence of the Minnesota and Mississippi Rivers,” and generally “mouth or junction of one river with another.” The population was 198 at the 2010 census.