British Columbia site C hydro 24

[GregLocock]

https://thenarwhal.ca/bc-site-c-dam-16-billion-horgan/

$8 billion overrun because they started construction before the geo was in. Projected lifetime income of the dam is $2 Billion.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[dik]

With the methane, cows produce, your steaks may go the way of the Dodo bird, too...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[1503-44]

Or turn into a nice lump of veggie burger.

 

[dik]

I've been using Ground Round (a veggie product) as hamburger for years; my wife's diet required vegetarian based... never totally vegan... It's not that vegans live longer... life just seems longer...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[SnTMan]

Same with quitting smoking

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Lou Scannon]

I always say, it's good to have several vices, so you have something to give up when times get tough.

"Schiefgehen wird, was schiefgehen kann" - das Murphygesetz

 

[1503-44]

"The World’s Forgotten Fishes" says that 80 freshwater species — which make up more than half of all the world’s species — have already been declared extinct, with 16 disappearing in 2020 alone.
Conservation groups behind the report, including World Wide Fund for Nature (WWF) and Global
Wildlife Conservation, point to a combination of pressures on global freshwater fish populations, including habitat degradation, damming and draining of rivers and wetlands, pollution, introduction of invasive species, wildlife crime and the ever-increasing threat of climate change.

https://www.nbcnews.com/news/world/...freshwater-fish-species-report-finds-n1258591

 

[bimr]

Don't it always seem to go
That you don't know what you got 'til it's gone
They paved paradise put up a parking lot

Songwriters: Joni Mitchell
For non-commercial use only.

 

[GregLocock]

""The World’s Forgotten Fishes" says that 80 freshwater species — which make up more than half of all the world’s species — have already been declared extinct, with 16 disappearing in 2020 alone.
Conservation groups behind the report, including World Wide Fund for Nature (WWF) and Global"

Sounds like a bit of cherry picking there (and fails the reasonableness test)

It has been estimated that the total number of all fishes is 32,500 species (Nelson, 2006). Considering that freshwater may constitute less than 0.3% of available global water, it is remarkable that there are more than 15,000 freshwater fish species. While marine communities contain more species in total, freshwaters are far richer per unit volume of habitat. Here, freshwater fish species occur at one per 15 km³ of water (cf. one per 100,000 km³ of sea water). This reflects the productivity, physiographic diversity and geographical isolation of freshwater habitats (Ormerod, 2003). Comprising approximately 25% of all vertebrates, freshwater fishes are an important component of global biodiversity (Reid et al., 2013).

Approximately 7,956 of all fish species (30%) are contained within just 6 of the 515 taxonomic families. Remarkably, ca 6,100 (77%) of species in these representative families live in freshwater (Figure 1).

Much taxonomic work still remains to be done and our knowledge on fishes changes rapidly. Since 1976, an average of 305 fish species have been described as new to science per year (Reid et al., 2013).

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[1503-44]

I'm pretty sure that the reporter meant to say "commercially valuable" fw fish. Of course as you note there's many thousands of fish species, like birds, but we only seem to eat ducks, geese and chickens for the most part. Ducks and geese not so much. But you are right, we shouldn't be the ones trying to sort out his obvious mistakes. And it is the commercially valuable species that get all the attention. ones that we seem to appreciate the most, rightly or wrongly, so that could be the case here. Least that's my take on it.

 

[GregLocock]

Try reading the report on which the nbc tripe was based, nowhere does it claim there are only 160 species of freshwater fish

https://wwf.panda.org/wwf_news/pres...ut-one-third-face-extinction-warns-new-report

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[waross]

I'll bite.
How many species of fish will lost due to the construction of site "C"?
Site "C" is an economic disaster, environmentally, not so much.
Are there any aquatic species unique to the 36 miles of river that will be impacted by the Site "C" Dam?

Bill
--------------------
Ohm's law
Not just a good idea;
It's the LAW!

 

[structuralCADspecialist]

Engineering in British Columbia is a hot mess right now. A mining tailing's pond's berm broke causing a huge natural disaster, two concrete buildings have apparently been designed completely wrong (and these faults were found randomly, so there could easily be others). Since I work in the construction industry I also frequently here of other incidents that don't get publicly reported. Not to mention the province's storied past (google "Station Square Collapse). I often check the province's engineering association's discipline notices (I'm curious to see the outcome of one of the concrete buildings in question). I see lots of discipline for relatively small (but time worthy) offenses, as well as fallout from the Mount Polley tailings pond disaster. Some of the big mishaps in the residential sector seem to get swept under the rug. I wonder if the association is understaffed?

Back on topic (Site C): Whether a person is a design engineer or a project manager, the person making the 'big decisions' should be held accountable. In the case of Site C, I think that someone should absolutely be held accountable. Hindsight is not applicable here as the end result was very reasonably foreseeable. To add insult to injury, the justification for building the dam is based on future projections rather than a shortfall in current demand (meaning they had no reason to rush into things like they did). People expect to receive the big salaries but with zero accountability. That's absolutely killing our society.

 

[cvg]

considering that design, permitting, construction and commissioning of a dam and hydro plant can easily take decades, it is absolutely justified to start early and use projected demands.

 

[structuralCADspecialist]

cvg, I agree 100% with starting early. That in no way justifies forgoing a thorough geotechnical study. Prior to breaking ground, several qualified experts made confident claims that there would in fact be issues (they were largely ignored of course). Whose to say whether or not the concerned group of geo's were more qualified than those saying to go ahead with the build... but look who was right in the end?

Typical cost over-runs for dam projects in Canada are ranging from 50% to 100% (1.5 to 2x the cost). Site C is the big outlier. This more or less holds true internationally as well. These are MASSIVE cost overruns and approaching Guinness World Record territory. Damns have been built in all types of soils and there are plenty of case studies to draw from. When a soil's stability is suspect, further investigation is a must. If a private contractor were responsible for this outcome they could getting their pants sued off. To be honest I won't be surprised if more facts emerge and people get in trouble. Or perhaps this will even spell the demise of BC Hydro itself.