If you are asking if you have
enough water,
the answer is probably yes.
As others have pointed out, you need to know three things with
wells. Depth, the highest the water rises, and gallons per minute. Unfortunately you do not have the last part of the equation, but that is okay I think.
We know your well is 505 feet deep. Since you want to keep your pump a minimum of 5 feet off the bottom, and your water is 50 feet from the ground height, you have 450 feet of water in your well. The standard well casing has 1.5 gallons per linear foot, so your well has a reservoir of 675 gallons of water! Put another way, you would have to pump out 650 gallons of water before your well went dry and that is before we calculate in a recovery rate...expressed as gallons per minute (which we do not know).
Still we do not need too. When soil engineers design septic systems they design them for a family of 4 to consume 150 gallons of water per day. That is the Joe basic, Smith family in rural America with no measurable amount of water conservation measures in place. So based on that, you can go 4.5 days just on your reserve. Want a dozen children...you would have less time before you would need some well recovery, less children and you could go longer. In short if your pump is at the bottom of the well, you got a lot of reserve.
My well is 290 feet deep, has water 17 feet from the ground level, with a recovery rate of only 2 gallons per minute. With a family of six, we have never run out of water. In contrast my fathers well is only 50 feet deep, yet gets 60 gallons a minute in recovery, and he has never run out of water with a family of 14. The more shallow your well is, the more gallons per minute you need. The deeper the well, the less you need.
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