If the water flows under its own pressure, it would be worth repairing the structure. Clean, fresh is invaluable during an emergency. If it flows, it would be handy for livestock and irrigation during non-emergency.
If it does not flow under its own pressure, can a hand operated pump be installed?
What is the temperature of the water as it comes out of the well?
I've done some number crunching on using irrigation water to cool a structure. If the water is flowing, run it through a radiator or a waterfall setup (swamp cooler), put a fan behind it, cool a room or a structure, the water then moves on to irrigate crops. The biggest
energy draw is pumping the water needed to cool a space. Free flowing water only needs a small fan to cool a space.
How about use the water for raising fish in tanks? The flow would maintain cleanliness in the tank. The dirty water moving out of the tank would do an even better job of irrigating crops.
The stemwall and slab of the building look pretty good. The
wood structure looks aged but straight. Anything wrong with the structure that cant be seen in these pics?