The BIGGEST problem with clean energy

what if you did it in the ground?  now it sounds weird i guess, but remember that "big tunnel" program from years ago?  they dug some huge holes in the ground to help with flooding in an area... now if you dig deep enough the temperature underground gets higher.... what if you used that?  i mean you dig your hole, the water is pumped in and goes to the bottom of the hole and is turned into steam... the steam rises... the steam then condenses and can be collected at a higher point in the tunnel.... so you can get power through both the steam rising and the water falling... the thing is to create a balance... between the amount of water going down and the amount collected from above, and the lag time needed to turn it to steam.... but idk how deep you would have to go?  how wide the hole would have to be? or the designs needed to harness the powers involved.... originally i just thought about it as a home power system, the size of a well but a very deep well, with the power system being able to be raised or lowered in the well, both for variable output and for repairs.... the thing is idk how it would work out.   ty for the chance of sharing it again thou... peace.