PINL:VITFF - Post by User
Post by
SWHuskyon Aug 18, 2024 10:47am
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Post# 36184842
re: The biggest dam failure in Canada
re: The biggest dam failure in Canada duck,
re: Imperial Metal (TSX III) Mount Polley Mine. The Co has survived. True,
Here's the difference! Victoria Gold is no Imperial Metals. BTW There were only a few Engineers that were ever charged with anything over the Polly disaster, and the mine is operational now.
Polly
Engineering: We need a place to dump all that unloved tailings thats full of stuff that we wouldn't get near to with a 10 ft slide rule as cheaply as possible (that always factors in, another inconvenient truth).
Ok hmmm Lets see This is what we will do. We are Engineers so we can defy the laws of physics with tech.
The 40-metre-high tailings dam was built on a sloped glacial lake. That weakened its foundation."
"A separate discipline hearing panel found that Fidel also committed several acts of unprofessional conduct.
She failed to ensure sufficient observation and monitoring of the tailings dam. The lack of site visits and monitoring of seepage flows allowed unsafe conditions — the instability of the embankment — to go undetected, according to the release.
Fidel also failed to ensure that an excavation left unfilled in the embankment was assessed to ensure stability — and failed to properly review the design drawings."
Note, This is interesting as to who was inspecting and who was overseeing and who got charged with professional behaviour unbecoming.
https://www.cbc.ca/news/canada/british-columbia/discipline-engineers-mount-polley-mine-waste-quesnel-lake-1.6137265
"He said Imperial Metals also received $100-million from an engineering firm that hired the engineers involved as compensation and $40-million tax credit for cleaning up the spill site."
Eagle
Engineering: We need a place to dump and perculate all that gold filled ore. Oh OK here a nice valley with an incline. Only problem is it's open on one end. No problem we'll just grab a bunch of dirt and rubber, block it off and call it a day. oooops we might end up with a hydrostatic pressure issue, no problem, just grab about 200k$ in tech and we'll see what happens, I mean what can go wrong, we have all the greatest modelling software and we have those world class pentium laptops so it's gotta be right, Right? Wrong! <wink>
Now I did notice a while back there were visual inspections done by an Allnorth EIT. Hmmm This sure sounds familar! Lots of questions there and please don't tell me sign off was based on pictures.
https://emr-ftp.gov.yk.ca/emrweb/COMM/major-mines/eagle-gold/emr-mml-eg-annual-physical-inspection-2022.pdf
Sec. 4 in the link below is more than interesting as to recommendations made during 2022 while the HLF was operational. It points to so many design comments that it almost like it's so "dainty" be so carefull anything you do as it could set off a disaster, then the design is flawed this is not dancing in the cornfields but MINING!
https://emr-ftp.gov.yk.ca/emrweb/COMM/major-mines/eagle-gold/Eagle%20Gold%20Heap%20Leach%20Facility%20And%20Cyanide%20Management%20Review.pdf
4.3.1 Stability Inspection In the link below is of interest
"An RST MEMS Digital Inclinometer system was procured by VGC to measure lateral movements of the HLF embankment dam" "The inclinometer provides the ability to provide the horizontal (X and Z components) of deformation tracking. Vertical deformation (settlement along the Y axis) tracking is required to fully understand the deformation pattern of the embankment as vertical settlement is typically larger in magnitude comparted to horizontal movement. Inclinometer readings will be required per the OMS and Forte and should be monitored every quarter."
https://emr-ftp.gov.yk.ca/emrweb/COMM/major-mines/eagle-gold/2023%20Annual%20Report%20Combined.pdf in my opinion