Posted by MarkB_MI on February 16, 2017 at 03:12:42 from (70.194.9.61):
In Reply to: Oroville Dam posted by farmerjohn on February 15, 2017 at 09:14:17:
I visited Johnstown last fall, something I've wanted to do for years. It's interesting on many levels. I never knew, for example, of the "Inclined Plane" funicular built after the flood to quickly evacuate residents.
There are many similarities between Johnstown and Oroville, and many big differences. The dam at Johnstown was originally well-constructed, but was taken over by folks who had no interest in operating it safely. It had failed and was reconstructed with several flaws, notably the removal of the outlet pipes, leaving only the spillway to control the water level. The wealthy club members who owned the dam wanted to drive carriages over it, so they lowered the dam to make the path wider. It was not a matter of if it would fail, but when.
The Oroville dam was not deliberately compromised, but it's apparent that problems with the main spillway escaped notice and should have been repaired. It also had a serious design flaw with the emergency spillway which outside groups identified in 2005, but which the cash-strapped state government declined to address and which the federal government did not make a requirement for the dam's permit renewal. (I'll note for the record that Arnold the Barbarian was governor at the time, and the Boy King was in charge in DC. Public safety was not a big concern for either one.)
What's common to both the Johnstown disaster and the near-disaster at Oroville is that the concerns of folks living below each dam were ignored by the dams' operators.
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