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Re:The World’s Aging Dams by dleslie on Tuesday February 09, 2021 @02:25AM (#26074791)
The three gorges dam was recently built; and closer to SV, Site C is under construction in British Columbia. There's definitely folks alive who know how to build dams.

I think the issue is less the lack of knowledge, and more the lack of political will to meaningfully tackle the problem.

Re:The World’s Aging Dams by bregma on Tuesday February 09, 2021 @07:13AM (#26076595)
Capital spending and construction are far more friendly to electoral politics than ongoing maintenance and operating expenditures.

People see what a good job you've done getting a dam built or a bridge constructed, they vote for you. People don't vote for you because they didn't suffer the consequences of reduced maintenance. People vote against you if you raise taxes to pay for maintenance or if they're inconvenienced by shutdowns while they repair your dam or bridge.

The problem is systemic.

Re:The World’s Aging Dams by HenryKissinger on Tuesday February 09, 2021 @08:12AM (#26077060)
Reject democracy, embrace technocracy.
Re:The World’s Aging Dams by sudosysgen on Tuesday February 09, 2021 @11:47AM (#26079607)
You can have a democracy that operates largely like a technocracy if you make it an actual democracy and align incentives.
Re:The World’s Aging Dams by Arrath on Tuesday February 09, 2021 @10:46AM (#26078801)
I'm currently on a project in California to repair and rehab a dam to extend its service life, working for a contractor that just finished a dam rehab job and is bidding on two more in the future.

The work is being done, probably not at a scale or pace big enough to meet the needs of the infrastructure (see: all those old and ailing bridges across the country) but it is being done at some level.

Re:The World’s Aging Dams by bullen on Tuesday February 09, 2021 @02:28AM (#26074805)
The problem is you need to burn alot of dead trees to make a dam and EROEI is dwindling too fast for this to become a viable option. Nuclear and hydro will never be rebuilt to the same level we have now.
Re:The World’s Aging Dams by varjag on Tuesday February 09, 2021 @03:48AM (#26075254)
Nuclear has its own decommissioning and long term disposal problem.
Re:The World’s Aging Dams by throwaway0a5e on Tuesday February 09, 2021 @06:54AM (#26076448)
If anything nuclear's problem is even more political than practical.

We could fulfill the world's nuclear waste storage needs with a couple landfills if the will was there (though any geologist will tell you are better options than near surface storage).

From an ecological perspective nuclear is the best option by a mile because the amount of stuff you need to pull out of the ground, move around, use and dispose of is so small per energy produced.

Re:The World’s Aging Dams by varjag on Tuesday February 09, 2021 @07:03AM (#26076516)
It's the same for hydro, the lack of political stakeholders in decomissioning process. I wasn't suggesting that it's physically impossible.
Re:The World’s Aging Dams by bullen on Tuesday February 09, 2021 @07:21AM (#26076641)
Nuclear has 1.000.000.000x the energy density of batteries so yes, but you need dead trees to build and maintain power lines, the power grid cannot be remade after it's current decline.

Tiny local hydro (with natural dam) is the future, but getting a building permit is near impossible. (I leave it to the reader to guess why)

We need to switch off electricity for everything except (low power) computers and networks. = hand pumped water, wood stove for water heater, earth cellar as fridge!

Mass transports are completely over, grow/breed/preserve your food locally!

Re:The World’s Aging Dams by bzbarsky on Tuesday February 09, 2021 @08:42AM (#26077305)
> wood stove for water heater

Even ignoring the CO2 aspect, the particulate emissions from this would be quite problematic in any sort of dense area. Not to mention what fraction of those particulates would end up inside the house...

Also, you don't mention heating (houses, not water). That is a huge part of energy consumption in many parts of the world.

Re:The World’s Aging Dams by ryanmarsh on Tuesday February 09, 2021 @08:59AM (#26077488)
> the power grid cannot be remade

What has changed such that you could not remake the power grid? Do we lack the raw materials or know how?

Re:The World’s Aging Dams by sudosysgen on Tuesday February 09, 2021 @11:48AM (#26079617)
You don't need trees for powerlines. Steel and an excavator is more than enough. Actually, just a shovel would be enough.
Re:The World’s Aging Dams by greedo on Tuesday February 09, 2021 @10:29AM (#26078560)
And then reality set in. This lifestyle simply won't happen.
Re:The World’s Aging Dams by cbmuser on Tuesday February 09, 2021 @03:18AM (#26075059)
Nuclear is being built in China like crazy. They‘re currently constructing 12 plants at the same time.
Re:The World’s Aging Dams by bullen on Tuesday February 09, 2021 @03:38AM (#26075182)
China has less reactors than france with 20x the population. They would need 1000 reactors to match.

For a commodore user you are very optimistic about things getting better!

More nuclear plants are getting closed than built.

Re:The World’s Aging Dams by boomboomsubban on Tuesday February 09, 2021 @03:41AM (#26075209)
It's still a far cry from the 70's. My quick counting showed the US opening around 40 from 70-75.
Re:The World’s Aging Dams by natmaka on Tuesday February 09, 2021 @11:04AM (#26079065)
Not really.

In short: ((by 2035)) nuclear generating capacity ((will be)) 7.7% out of predicted total electricity generating capacity.

See https://en.wikipedia.org/wiki/Nuclear_power_in_China#History

They, however, built renewables like crazy.

Re:The World’s Aging Dams by ryanmarsh on Tuesday February 09, 2021 @09:02AM (#26077515)
I hope they're better at running nuclear power plants than they are at running infectious disease labs.
Re:The World’s Aging Dams by Kluny on Tuesday February 09, 2021 @12:30PM (#26080221)
> Site C is under construction in British Columbia.

Not sure if this is a good example of "know how to build dams". It's a dam foolish design, built on an earthquake fault zone that's been made unstable by the excavation that's being done to build the dam. The design has been changed to include this ridiculous earthfill section (https://www.sitecproject.com/about-site-c/site-c-project-com...) to compensate for the weirdness of the geography there. It's probably going to fail catastrophically at some point and destroy a lot of homes downstream from it, and the controversy over the project basically caused the downfall of BC's last government.

Re:The World’s Aging Dams by remote_phone on Tuesday February 09, 2021 @03:15PM (#26081934)
My friend does some auxiliary work for Site C. He said everything is over budget and a mess. The initial contractor underbid because they thought they could get migrant workers in. But now they are dealing with union workers so the contractors messed it up badly.
Re:The World’s Aging Dams by dleslie on Tuesday February 09, 2021 @04:35PM (#26082654)
Somewhat relatedly; I have PEng friends who worked on the budgeting for Transmountain before the Grits bought it.

The true cost will be somewhere around 3x the expected, in the long run. They lied through their teeth to offload the lemon onto the feds.

Re:The World’s Aging Dams by dleslie on Tuesday February 09, 2021 @04:39PM (#26082683)
All of BC's dams were built in an earthquake zone. That's sort-of a given.

Huge portions of the Comox Valley and Coquitlam are precarious; a strong shake will send a wave of water that will wipe out thousands of homes.

Re:The World’s Aging Dams by Kluny on Tuesday February 09, 2021 @06:06PM (#26083715)
We're not just talking about natural earthquake risk. The fracking that's happening near the dam is actively making the earthquakes worse.

https://thenarwhal.ca/fracking-induced-earthquakes-buffer-zo...

Re:The World’s Aging Dams by dleslie on Tuesday February 09, 2021 @08:56PM (#26084977)
Why on earth are the NDP allowing fracking that close to those dams? Holy hell.
Re:The World’s Aging Dams by Kluny on Wednesday February 10, 2021 @12:42AM (#26086033)
Hey, give credit - the Liberals allowed it, the NDP just continued to allow it.