thermo generator problems

#1 Posted by Mastachief2552 (1903 posts) -

so i have steam vents and the money to build, but when i try to build a thermo generator i only have the option to excavate the spot i want to build on. is there something i am missing or is there some kind of research i need to do to build thermo generators.

#2 Posted by Zaral_1 (186 posts) -
you need to excavate before you can build on some spots