The change on 3 February 2026 to increase Depletion accumulation not only reverses the reduction of Depletion on the previous change (4 October 2024) but raises it to punitive levels where it will be 100% in 10 weeks if there is no Premium in force and no Storekeeper officer. The Senate should consider whether the recent change should be rescinded and Depletion accumulation reduced to the level prior to 3 February 2026, or at least no more than the level before 4 October 2024.

The change, effective February 3, 2026, which increases the accrual of depreciation deductions, not only eliminates the depreciation deduction reduction provided by the previous change (October 4, 2024), but also increases it to a punitive level, reaching 100% after 10 weeks if there is no insurance premium and no storekeeper. The Senate should consider whether to repeal the recent change and reduce the accrual of depreciation deductions to the level in effect before February 3, 2026, or at least to no higher than the level in effect before October 4, 2024.

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К корректности расчёта скорости истощения, представленного ТС, есть некоторые вопросы.

Предлагаю следующее сравнение истощения ДО и ПОСЛЕ введения новой формулы:
По старой формуле истощение через 6 мес. составляло 18,77% , через 1 год -- 35% , через 2 года -- 65%. Через 3 года шахта полностью истощалась.

По новой формуле полное истощение наступает примерно через 700 дней. Со временем истощение значительно увеличивается, если шахте больше года. Таким образом истощение растёт по экспоненте, с нарастанием уровня истощения по времени.

через 10 недель накопление амортизационных отчислений будет ( выработка упадёт ) = 0.01% *10^2 = 1% .

Thanks for the feedback here and in IMs.
I am not sure if the worked example was added in the game later or I just missed it, but this clarifies the need to multiply by 0.01 as well as treat the value as a percentage.
i.e. the depletion factor after 6 weeks is actually 0.01 x 6^2 percent (i.e. 0.36%) not 6^2 percent (i.e. 36%)
Taking this interpretation I have updated the chart and this looks much better, with a lower Depletion initially but rising much quicker over time.


I think the in-game definition should be clarified to reflect the actual calculation as per the worked example as currently it is ambiguous.

Current: The depletion percentage is equal to the number of weeks since the current building level was constructed to the power of 2.
Proposed: The depletion percentage is equal to 0.01 multiplied by the number of weeks since the current building level was constructed to the power of 2.

So today we have a new Depletion change:

So if Depletion was 25% and you upgrade a Mine you could end up with 95% Depletion!?!?!
So nobody in their right mind would upgrade before Depletion was well over 50% as the effect would probably be worse not better Depletion!
A random percentage between 0 and the previous depletion level (so between 0 and 25 in the example above) would be logical and acceptable...0-100% is not!

No.
There's an “exhaustion accumulation period” that is used to calculate current level of exhaustion. Earlier it was set to 0 after a mine upgrade, now it is reduced by this random percentage.

UncleanOne, So the upgrade will reset current Depletion to zero, but whatever this “exhaustion accumulation period” is will be set to a random number 0-100 at the same time?
So what does this actually mean? Can you give a worked example?

I am guessing you might mean is that if you had 25 weeks depletion (i.e. since the last upgrade) that would be reduced by 0-100 so you MIGHT get a reset to zero, or you may not get much reduction at all, but it won't get worse. Is that right?

No.



It won't be set to random number, it will be reduced by random percentage.



Suppose your previous upgrade was 50 weeks ago. So your exhaustion is at 25% (50^2*0.01).
After an upgrade, these 50 weeks will be reduced by a random percentage, from 0% to 100%. If it, for example, gets 70% as a random roll, your 50 weeks will be reduced to 15 weeks. So your new exhaustion will be 2.25% (15^2*0.01).

UncleanOne, Got it, thanks so much! I'd never have got this from the change description. It would be really helpful if changes like this had an explanation linked from the notification in Balance

This may be an auto-translation problem, human review of these announcements may lag for a day or two.