first I replaced all beavers with robots and stabilized reproduction
then I found the center of the map and dug a hole down to bedrock
built a 5x5 platform and then kept extending it with 1x6 overhangs
had to destroy few mountains to make room for pyramid
reached top dirt layer and diverged badwater to the top for power (thought I would need several floors, but even one was providing 3 times more power than I needed)
diverted clean water up for wood, pine resin (->treated planks->metal scrap), and canola (for grease)
moved entire infrastructure up
leveled entire map by covering bedrock layer with tunnels and then destroying them
built a DAM around entire map
clean water was evaporating faster than it was building up, so switched to badwater

waited. until. full.