To be honest, I did not read you whole post (I have a short attention span). If you are not aware, the leak is not necessarily at the level where the lake stops dropping. The lake may be connected to the water table at any place in the basin, or there could be a connection with the sand vein anywhere in the basin such that the water enters the vein but somewhere back under the soil must rise to the "lower" water level before continuing down stream.
P.S. I am no expert, but have contracted a couple successful ponds and a few wetlands. The only one that leaks is a wetland built as part of a mitigation project by "experts" on land that we volunteered, and we told them it would since they did not disrupt the field tiles properly or core the berm. Fortunately it gets enough inflow to make it a nice seasonal wetland anyway. Not sure if it will pass their criteria though.
Last edited by RAH; 09/29/13 07:10 AM.
