Sheri, thank you for posting about your pond. It motivated me to finally try it. I have a back corner of my yard that was clay after I dug out 8 inches of topsoil. I dug out a 5' x 10' rough hole 3 feet deep. Filled it with water and waited for two weeks to see if it would hold. It did so no liner! I used the extra dirt to cover some hugle mounds to add some texture around the ponds. It turned out great after landscaping it. Thanks again for the inspiration!