Why is the water level not rising in borewell?


I have dug a borewell 855 feet deep. I got two sources, one at 196 ft and another at 220 ft. Total yeild is 3/4". But after scanning the boewell using a camera, I found that there is only 50ft of water from the bottom of the borewell .

At 816 ft there is one more source. But I dont know whether it is a dry source. So please let me know why water level is not rising up.