Bob, the main reason the water stays so cold is during the hottest part of the summer we have to water the corn crop. We usually pump around 600 gpm (up to 1200) into the pond for a couple of days then pump it out to water the corn. Then the process starts over. The water comes out of the ogallla aquifer and is around 52 to 56 degrees, so the water doesn't get much of a chance to warm up. Also the average low at night is the lower 60's. Maybe thats because we are at a higher elevation at 3500 ft than the rest of oklahoma. Thats just my theory. Another thing is the pond is mostly shaded. I hope I answered your questions.
