Thanks.
Sounds like Juan is catching up on some of the things
we have been discussing here in the last few days.
One thing I heard new was the “Cyclopian Wall” plan.
An engineering expert who visited the troubled Oroville Reservoir said this week that it would be nearly impossible for the state to complete temporary repairs to its fractured and eroded main spillway by a target date of Nov. 1.
In a report submitted to the Federal Energy Regulatory Commission this week, a panel of five independent consulting engineers warned that “a significant risk would be incurred” if the main spillway was not operational after October, which is the traditional start of California’s rainy season.
However, an engineering and risk management expert who was not part of the consulting panel told The Times this week that he doubted the state could meet such a close deadline.
“I think that is a challenging timeline,” said Robert Bea of UC Berkeley’s Center for Catastrophic Risk Management.
Bea, a retired civil engineering professor who led an investigation into failure of the New Orleans levee system after Hurricane Katrina, visited the reservoir recently to review inspection documents, as well as the report by the Independent Board of Consultants.
The consultants proposed that temporary repairs to the spillway be completed by Nov. 1, and that permanent repairs be completed after the rainy season.
In order to accomplish this, report authors said the Department of Water Resources should award grading contracts by March 31, complete design plans by mid-May and approve a construction contract by June 1. That would give the company five months to complete the work, the report suggested.
Bea said that schedule leaves little space for unanticipated problems.
http://www.latimes.com/local/lanow/la-me-ln-oroville-repair-timeline20170324-story.html
I don’t know if a link to this doc has been posted yet, but it mentions “cyclopean check dams”
https://www.ferc.gov/industries/hydropower/safety/projects/oroville/03-17-17.pdf