In C-evo, as generally in games of this type, the time a settler or engineer takes to perform terrain improvement tasks depends on the task and may also depend on the terrain. The in-game manual refers readers to a "terrain enhancement box". That box seems to be missing from the currently available version. It would probably contain a table of required movement points such as the following:
- (under construction)
|EASY country without river||Easy country WITH river||ROUGH country without river||Rough country WITH river||Hill||Mountain|
|Road||3 (includes desert)||12||6||15||6||9|
|Fortress (manual says "6" but that is clearly wrong for some terrains)||6||6||12||12||12||18|
|Military base (manual says "6" but that is clearly wrong for some terrains)||6||6||12||12||12||18|
|Clean up pollution||18|
If you want to build a mine quickly on Arctic terrain, before you have engineers, you can build a military base (requiring Medicine) first, because it neutralises terrain hostility letting you replace it with a mine without having to move off for recovery every few turns.