In many places in Oklahoma you can hit first ground water at around 30ft. For irrigation this water may be good enough.
It took me a bit to find this link again but it may be of help. It is an army way to get water.
http://www.fdungan.com/well.htm
It took me a bit to find this link again but it may be of help. It is an army way to get water.
http://www.fdungan.com/well.htm