If you're going to pump water back in you better check out going solar. I have 2 wells, 1 solar, 1 electric, pumping from 150 ft. deep. The solar setup wasn't cheap (about 7K) but I only incurred the original setup cost, it pumps about 18 GPM whenever the sun is out. The 3 HP electric pump does 35 GPM but runs about $10 per day to operate. Since you're just pumping from a downhill pond, you should be able to get by with a much smaller setup, you may be able to do it for less than $1000. Just a thought. My 3 acre pond has no watershed, the solar setup has been in almost a year and works great. I haven't been forced to use the Electric well and I'm in East Texas which went thru a really bad dry spell last year.
