Testing old well

I am building a house on some old family land I bought back. This old well is out there. All I know is “it still worked but I think the water got dirty”. Nobody who was around then is still around to answer any questions about it. That was the early 80s from my knowledge. We’re building a house here later this year but I don’t plan on using this for the house. Mainly just want to use it for irrigation and/or watering livestock. Looks like the date on the top says 7-13-70. Is it worth it to try to put power to it and see if it brings water up? Or should I drop something down on a string to see if there is water and how deep? Any advice on the best way to proceed is appreciated