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The Powered Mill is a Production Building that must be purchased with Pramin. It was added on October 5th. Like the Logging Camp, the Powered Mill produces and stores wood, producing and storing more with each upgrade.  A certain amount of wood produced by the Powered Mill is automatically stored in the Powered Mill until it is harvested (by clicking on the Powered Mill) and thus transferred to Wood Storage

A maximum of 8 Powered Mills can be built.

Building/Upgrading[]

Rank Resources Cost Time to Build* Max Storage Time to Fill* Production per Minute* Payback Time (Wood Only) (Days)* Payback Time (All Resources) (Days)*
Rank 1 25 Pramin 00:00:15 300 02:00:00 2.5 -- --
Rank 2 2310 Wood 1000 Metal 04:00:00 1680 08:00:00 3.5 2.19 2.88
Rank 3 9720 Wood 6000 Metal 10:00:00 4320 16:00:00 4.5 8.63 12.79
Rank 4 28050 Wood 18000 Metal 20:00:00 7920 24:00:00 5.5 24.06 36.56
Rank 5 64740 Wood 42000 Metal 28:00:00 12480 32:00:00 6.5 52.54 81.71

* assuming that Rally isn't used to speed up building or production


"Payback Time" refers to the length of time for the production of the new upgraded Powered Mill to match the production of the unupgraded Powered Mill. The first Payback Time column above takes only wood into account. The second (All Resources) Payback Time column adds wood and metal units together. This may assist players in making the best possible decision regarding building and upgrading.  

Here is a simple example to illustrate payback time:

Upgrading from Rank 3 to Rank 4 costs 28050 metal and involves a production time of 0.83 day (if not using Rally).  From the time the upgraded is started, it will be 24.06 days before the upgraded mine has caught up to the production of the mine if it had not been upgraded:

(Production for Rank 3) = (4.5 wood/min) * (60 min/hr) * (24 hr/day) * 24.06 days = 155,909 wood

(Production for Rank 4) = (5.5 wood/min) * (60 min/hr) * (24 hr/day) * (24.06 - 0.83) days - 28050 wood = 155,931 wood

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