Just added a pic / drawing to a post above, sorry I didn't put it there first go round,....I THINK that what we're seeing in that hole immediately below that spill wall IS the actual core structure of the "impervious wall". The minimalist philosophy that defines the engineering of "Earth Filled Dams" DICTATES that that core structure has to have massive weight (overburden) bearing on it from above,..... ....washing it all away is not a very bright idea, and one has to ask, WTF else did they EXPECT that overburden to do ?
GTC
Member, Clan of the Border Rats -- “Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.”- Mark Twain
