m4rtink 6 hours ago

This is quite normal thing to do for many open pit mines or rather hard not to do if the pit goes below the water table.

There are some very nice natural swimming pools in the local area thanks to that, for example:

https://www.kudyznudy.cz/aktivity/koupaliste-u-libuse-v-lule... (stone quarry, IMHO one of the best summer swimming pools anywhere)

https://cs.wikipedia.org/wiki/Zatopen%C3%BD_lom_v_Blansku (stone quarry)

https://www.jednoustopouceskem.cz/listing/lom-kaolinka-prime... (kaolin mine)

larusso 4 hours ago

This report seems to be a bit one-sided. They say the lakes will be used as reservoirs for rivers like the spree. The issue is that the spree was feed for years with excess water from the old mines which had to pump the water out. Now they don’t pump water anymore to fill up these lakes and some parts of the spree run low on water during summer. The water table fell a lot over the last 10 to 20 years in Berlin. I’m not sure what exactly contributed to this situation overall. But they had plans to pump water from the Elbe into the Spree to help out with the situation. But cities downstream are not happy about the situation. For me this feels like a somewhat similar situation to the Colorado River situation with the upper and lower basins.

https://www.rbb24.de/panorama/beitrag/2026/07/wasser-mangel-...

  • Krasnol 3 hours ago

    > The water table fell a lot over the last 10 to 20 years in Berlin. I’m not sure what exactly contributed to this situation overal

    Climate change, as your article says.

    It also says that they want to use those new lakes as reservoirs to help out the situation.

    • larusso 2 hours ago

      Yes climate change is the biggest issue. But also the fact that the spree was artificially topped up for roughly 100 years and the cities and industries count on that water.

      So it will be rough for the area. It’s man-made though. That’s why I compared it to the Colorado basin situation around lake Lake Mead. Here is another article: https://www.umweltbundesamt.de/presse/pressemitteilungen/spr...

      • margalabargala 7 minutes ago

        Only temporarily. If water was being pumped out of the mines into the spree, and now is filling the lake, that only affects the spree until the lakes are full. Then the same amount of water will again flow into the spree as when pumping was happening.

martin_a 4 hours ago

To provide a counterpoint that is missing in the article: Conservation organizations are somewhat skeptical that these projects might take much longer and be more expensive than planned, due to climate change.

Projects like Garzweiler and Hambach were expected to take 25 to 30 years to fill up, but with droughts like this summer it might take much longer and the water would have to be diverted from already stressed ecosystems like the Rhine.

This whole topic has become much more complicated in the last years...

wewewedxfgdf 5 hours ago

Mining operations often are toxic environments for various reasons aren't they?

  • munk-a 2 hours ago

    It's dependent on the minerals being prospected for and the mining techniques as well as general awareness and regulations that were in place during operation. Yellowknife has a huge ecological issue due to Arsenic being actively used in Giant Mine[1] but that was introduced to ease mining (mercury is also commonly used for gold extraction and purification, though occasionally offsite). So it really depends on the mine. Mines are never good for the environment but how toxic they are will vary.

    1. https://en.wikipedia.org/wiki/Giant_Mine

  • altcognito 5 hours ago

    Excavation pits can be clean and I'm pretty sure they would have considered what was left in the pit.

    What you're thinking of is the processing aspect of mining, which is a whole different beast.

    • pixl97 5 hours ago

      No, not exactly. Many kinds of rocks and soil will release Acid Mine Drainage (AMD) or otherwise release sulfates and heavy metals into the environment. Of course a lot of this will already be known from the treatments they had to do when keeping the water table low when mining.

      When I was a kid I remember a number of very old stone quarries that had been allowed to fill, then years later they had to put up warnings for people to stay out because the high Ph water was dissolving metals into it.

pretzellogician 6 hours ago

These strip mine reclamations are just great.

In the 1990s, we lived on a lake in Indiana that was reclaimed from strip mines. Recommended.

jttnr 6 hours ago

On the one hand, it's nice that they're doing it.

One might think that they've come to the conclusion that it's time to phase out coal and move towards renewables. But coal is still big in Germany, and with the current Minister for Economic Affairs, Katarina Reiche [1], the fossil fuel lobby has installed a puppet in that position, one who is going all in on fossils again and pushing legislation that makes it much harder to expand solar and wind capacity. Even though no one needs coal anymore, big companies like RWE still forcibly demolish villages to expand their mines and show off their power .

[1] https://en.wikipedia.org/wiki/Katherina_Reiche [2] https://en.wikipedia.org/wiki/Hambach_surface_mine

  • cbmuser 5 hours ago

    Wind and solar power do not provide dispatchable power and they therefore do not replace conventional power plants.

    Germany isn't keeping their coal-fired power plants and they're not building new gas-fired power plants despite the energy transition but because of it.

    You're spreading conspiracy theories when you claim Katherina Reiche is a fossil fuel puppet. She is doing what has always been the plan for the energy transition: Building gas-fired power plants.

    That plan is even in the DENA study for the energy transition:

    https://www.dena.de/fileadmin/dena/Dokumente/Pdf/9262_dena-L... (p. 29)

    And before you claim DENA is some sort of fossil fuel lobby organization, they're not. DENA belongs to the German state and was founded in 2000 by SPD and Greens:

    https://de.wikipedia.org/wiki/Deutsche_Energie-Agentur

    • foota 2 hours ago

      "Wind and solar power do not provide dispatchable power and they therefore do not replace conventional power plants. Germany isn't keeping their coal-fired power plants and they're not building new gas-fired power plants despite the energy transition but because of it."

      4 hour storage battery operated renewables are now cost competitive with gas plants.

      • leonidasrup 39 minutes ago

        The problem is that you need energy storage for much longer times then 4 hours.

        " Most of these events occur from October to February; typically 50 to 150 hours per year, a single event usually lasts up to 24 hours "

        https://en.wikipedia.org/wiki/Dunkelflaute

      • jttnr an hour ago

        Exactly, but it is not a binary thing. The most capable solution is a combination of both. The batteries can kick in within seconds to bridge a couple of hours, while the gas turbines have enough time to fire up slowly as the batteries get close to empty and there is still no wind or sun.

    • sajithdilshan an hour ago

      I remember reading somewhere that they are planning on using excessive wind/solar energy to generate Hydrogen gas and use that for energy instead of Hydrocarbon gases.

    • planb 5 hours ago

      Sorry, but in Germany there isn't even much of a debate anymore about whether she is a puppet of the gas industry. She even asked EnBW for arguments in favor of gas-fired power plants in order to avoid holding a technology-neutral tender process as required by the EU: https://www.spiegel.de/wirtschaft/katherina-reiches-minister...

    • yangm97 4 hours ago

      Yes, the so called base load isn’t the strength of intermittent renewables and yet Germany turned off clean, nuclear power in favor of gas and coal plants.

      I wonder how that happened…

      • crote 3 hours ago

        Base load is an obsolete concept. A renewables-heavy grid simply doesn't work that way.

        Renewables like solar have a per-MWh generation cost of zero. You literally have to make the electricity price negative before it makes sense for the operator to shut it down. Their profitability depends only on the average electricity price: the high market price during the winter makes up for the near-zero market price during the summer.

        In a free electricity market there is absolutely zero demand for a power plant which generates a constant amount of power and acts as the "base supply". With dirt-cheap renewables its capacity simply isn't needed during the summer and its nonzero running costs makes it unable to compete. What is needed instead is a peaker plant which can supplement renewables, and which is profitable when it operates only during low-sun low-wind "dunkelflaute" winter weeks.

        Nuclear is fundamentally incompatible with this. It is the most expensive form of electricity generation and its costs are dominated by the need to pay back a massive construction loan. In a free market a nuclear power plant would only be able to operate for a few weeks per year, which instantly kills its business case.

        Want nuclear? Then you'll have to accept that it will require huge government subsidies, and that during high-supply moments you'll be turning off free renewables to make space for expensive nuclear.

        If anything, one could say that renewables will be the new base load supply. The real question is: who will be doing the peaking?

      • b2ccb2 4 hours ago

        Fear. I grew up when the radioactive cloud from Chernobyl reached us. I didn’t grow up eating mushrooms. We still measure radioactivity here, ask any hunter. When Fukushima happened, it tore open an old wound. Is it rational? I’m not sure, but I remember my parents taking in 2 Ukrainians for a month to detox in Germany.

        • ba1afd89f34cb23 4 hours ago

          I think this is spot on. It is not rational, but it's deeply rooted. I vividly remember the children's TV explaining nuclear chain reactions, what happened in Chernobyl, and why kids couldn't play in sandboxes on the playground anymore for a while. Die Sendung mit der Maus had a whole segment with ping pong balls on mousetraps, setting one off, and that cascading into hundreds of mousetraps shooting the balls everywhere. Much like middle-aged American adults in 20 years are going to remember Sesame Street having very special episodes about Katrina or 9/11, middle-aged Germans remember a very fearful time around a nuclear disaster that happened close enough to home that it impacted them - fortunately not in a truly disastrous way. And that has an impact on public opinion, emotionally.

        • Krasnol 3 hours ago

          We measure radioactivity in Germany because boar and deer are still contaminated. Especially in southern Bavaria. Samples exceeded the EU limit value for consumption by up to 25 times.

          A study found that most of the contamination these days doesn't come from Chernobyl anymore but from nuclear weapon tests.

          https://www.infranken.de/bayern/warum-wildschweine-in-bayern...

          PS: hunters with contaminated boars have to pay for the disposal themselves but can get the money back from the state. So, like with everything around nuclear: in the end it's the taxpayer who has to pay for it.

          https://www.bayern.landtag.de/www/ElanTextAblage_WP17/Drucks...

      • mschuster91 3 hours ago

        > and yet Germany turned off clean, nuclear power

        Oh ffs. Nuclear power is not clean. Look what the GDR left us with the Wismut "heritage" - mining for uranium is incredibly toxic, and safely disposing of the spent fuel and all the other irradiated remains is incredibly expensive.

        We just don't see it in our Western nations because we get our uranium from Russia, other -'stan countries and remote regions in Australia and Canada where barely anyone lives to care about the destruction.

        As for the disposal, over half of the already measly budget for the Ministry of Environment goes to take care of the nuclear waste - 1.4 billion euros A YEAR [1]. In contrast, only 400 million euros are spent on environmental production. Nuclear power wasn't just never clean, it also was never cheap because the true costs were never accounted for.

        [1] https://taz.de/Budget-des-Umweltministeriums/!6102402/

        • crote 3 hours ago

          On the other hand: it is significantly cleaner than power generated by burning fossil fuels, and we don't exactly account for the environmental impact of renewables either. Like it or not, people care only about the direct impact it has on them, and it has been long enough since Chernobyl that nuclear isn't scary anymore. An anti-nuclear argument based on waste might not be wrong, but it isn't going to convince many people either.

          Want to convince people that nuclear is a bad idea? Forget about the waste, the dangers, and the overseas environmental impact, and instead focus purely on the cost. The business case for nuclear in a renewable-heavy grid is extremely poor, and very few people like nuclear enough that they would willingly pay massive subsidies to choose it instead of any of the alternatives. For most people nuclear is a necessary evil and a magic-solve-everything solution to the climate crisis: they don't like it enough to stick to it when more attractive options exist.

    • martin_a 4 hours ago

      > conspiracy theories when you claim Katherina Reiche is a fossil fuel puppet

      lol, wtf?!

      Before becoming a minister she was employed by E.ON (for non-Germans: one of the big four energy companies in Germany) to lobby for their interests.

      She is _the_ prototype of a fossil fuel puppet.

ixxie 4 hours ago

Cool, but how is this bigger than, e.g. East Finland's lake landscape?

nephihaha an hour ago

This is a great idea. I think there are issues with possible contaminants but if that can be sorted...

ed_balls 5 hours ago

I wish someone would try to convert them in geothermal plant.

  • Quarrelsome 5 hours ago

    I think you need to go much, much, much deeper for that.

    • ed_balls 3 hours ago

      I was thinking about hybrid approach. Drilling to 5km and get water that has 200 C and use natural gas to provide additional heat to produce steam at 374°C.

      Alternatively, flood the mineshafts and set up heat exchangers. Wait for Co2 turbines to become viable and get rid of gas.

    • yangm97 4 hours ago

      Millimeter wave boring (aka death star laser) is supposed to help with that.

nurettin 6 hours ago

Germany is pretty famous for tagebaurekultivierung.

  • ant6n 5 hours ago

    The Tagebaurekultivierungsaktivitäten have been going on for a long time. I remember visiting some former open pit in the 90s, as they started filling it, noting how it would take like 10 years or so. Pretty strange land.

    • jcattle 5 hours ago

      10 years? That's nothing. Flooding Hambach will take approximately 40 years. And that includes water from the Rhine carried there by pipeline, which in the current state of the Rhine is... optimistic.

7e 5 hours ago

Is it safe to recreate in water that has been exposed to all of that mining slough?

wg0 7 hours ago

Now please bring back solar + nuclear energy and stop pretending that burning oil is cleaner.

  • eigenspace 6 hours ago

    Why mention nuclear but not wind? Wind has nearly as low an LCOE as solar, and is still dropping too, and wind power is anti-correlated with solar power, meaning we get more wind at night and in the winter.

    • wg0 6 hours ago

      Yeah wind too.

    • dgellow 6 hours ago

      The north, where I live, has lots of windmills and more is being built

    • cbmuser 5 hours ago

      > Wind has nearly as low an LCOE as solar

      Because production costs aren't what's setting the prices, supply and demand is.

      Cheap solar and wind power doesn't help when it's not available.

      • mejutoco 5 hours ago

        How much less of a problem is this as batteries improve? Honest question, I never saw this quantified.

  • Zigurd 6 hours ago

    One of these things is not like the other. You can have solar next week at a reliable price and you'll be able to buy insurance for your solar array on the private market. Nuclear isn't going to happen no matter how many data center projects get hyped. No nuclear project will be complete before we're all talking about data centers like we talk about the Metaverse.

  • sharpshadow 5 hours ago

    Good luck with solar in Germany when you will be paying a fee for feeding in energy to the grid during solar peek time from 2027 onwards.

    • 1718627440 4 hours ago

      Why would that be unreasonable? Generating some power somewhere, sometime isn't hard. Generating the right amount at the right time in the right location is. (In other words logistics.)

      So yeah the cost is in moving and storing the electricity by maintaining and expanding the infrastructure.

    • mejutoco 5 hours ago

      Do you have a source? Can you "waste" that energy instead of feeding it in?

      • fc417fc802 an hour ago

        It's solar so you can literally just unplug it. Although at the scale of an individual house you can just unplug (or otherwise deactivate) pretty much anything. It's the industrial scale stuff that can't be adjusted on a dime.

        • artisinal an hour ago

          I could probably make a small PCB with a light sensor, that disconnects the solar panels (through a relay) once sunlight hits the sensor. So you aren't paying any fees for supplying the grid with energy.

      • martin_a 3 hours ago

        Why not store it in small and large battery systems and use it later?

        • mejutoco 3 hours ago

          Much better yes. I am just thinking that worse case one could burn it to not have to pay, so in reality having to pay would not be a problem.

  • BlackRabbit1 7 hours ago

    We are currently busy building new gas turbines. lol.

    • eigenspace 6 hours ago

      Even if the number of gas turbines will increase (it's not increasing nearly as much as you'd think if you just look at the number being built, because old ones are also being decomissioned), the amount of gas being burnt on an annual level is going to be going down. These gas plants are for bridging gaps left open by wind and solar which cannot yet be covered by batteries.

      If you believe in the transition to renewables, Germany fundamentally does still need gas turbines to make that happen, more than we currently have.

    • bryanlarsen 6 hours ago

      That's not inconsistent. A robust grid will have enough capacity of any sort to cover peak demand during a dankelflaute but enough zero-emissions generation and storage to cover generation at all other times.

      And that's exactly what Germany is doing. Their natural gas plants only run ~15% of the time. Usage is going down faster than capacity is going up.

      https://unpopular-truth.com/2024/07/05/natures-influence-on-...

      • Tomte 6 hours ago

        Because everyone copies it: the word is Dunkelflaute. U, not a.

      • KyleTheDev 6 hours ago

        TIL Dankelflaute, a time when it is too dark with too little wind for either solar or wind energy generation. Thank you for this amazing word.

        • bryanlarsen 6 hours ago

          It has to be scoped by area. A Dankelflaute that covers the European continent has never been observed. OTOH, a Dankelflaute that covers only Germany is a regular occurrence.

          • cbmuser 5 hours ago

            So, you're telling me there is daylight in Spain when we have night in Germany?

            Also, have you ever done some research on how winds work? They're usually blowing (or not blowing) across the whole continent.

            So, yeah, Dunkelflauten usually cover the whole continent.

      • e2le 5 hours ago

        I'm sceptical that more gas turbines doesn't create a more vulnerable grid. The possibility of gas shortages this winter is on the horizon and if the UK were to cease exports for whatever reason it would be a disaster for the rest of Europe.

        Ed Conway released a video on the UK's gas network and disaster planning[0].

        As shown in their documentary, a shutdown of exports to Europe would only require 2 or 3 failure events (low production from wind/solar, high-usage of gas for power/heating, disruption or cessation of imports via gas-tankers, well-placed damage to the gas network, extreme weather in the north sea). To maintain pressure in the gas network, they would begin shedding the largest loads first, exports to mainland Europe is #1 on that list.

        Let's also not forget Nordstream and the disaster that caused when it mysteriously blew up. Before those pipelines exploded, there were protests in Germany because people were struggling to heat their homes.

        Nuclear isn't vulnerable to any of these issues, we're very lucky that construction and investment has continued these past decades. /s

        [0]: https://www.youtube.com/watch?v=sKDnZz4wypI

        • bryanlarsen 5 hours ago

          Capacity isn't the problem, usage is. If Europe reduced its usage to about 10% of current usage, full tanks would last a full year.

          Nuclear is unsuited for this problem. Europe needs something that will supply approximately all of its power needs for only a few days a year. Europe already has enough natural gas storage to do this. If you built enough nuclear to cover all its power needs for a few days a year you'd have enough nuclear to supply all its power needs 365 days a year. That would work great, but it would cost tens of trillions.

    • cbmuser 5 hours ago

      We have to build new gas turbines since wind and solar do not provide dispatchable power.

xbar 5 hours ago

I feel bad for the post-apocalypse folks who won't be able to find any dry, solid fuel to burn.

  • giardini 4 hours ago

    I dunno:

    1. There should be plenty broken up press board after the apocalypse. It is apparently quite flammable but sometimes gives off bad emissions. Perhaps you should set up a website where people can print a guide to press board emissions, so we all will know which to cook foods with and which to only heat with.

    2. And there should be plenty of auto tires. Here's a fella who needs only a few tires each day to heat a 12' x 16' corrugated metal siding workshop:

    https://www.farmshow.com/view_articles.php?a_id=1072

    Another article with photos:

    https://www.farmshow.com/a_download_page.php?aid=MzI4Nw==

    3. Finally we see:

    "Study Shows Dangerous Plastics Are Being Used As Fuel To Heat Homes":

    https://www.slashgear.com/2075676/plastic-fuel-burning-heat-...

    So I don't see a problem finding dry combustible fuel, In fact gathering fuel will be somewhat like gathering manna in the desert!8-))