Thank you for the reply, nice to hear from someone upstate. So your evaporation and or absorption is about on par with my neighbors. Which is about half of mine.
There was definitely no core trench for the damn. We basically dug one pond next to another. The piece in between which we call a land bridge serves as a dam, but wasn’t constructed as such. The pond was not rolled, only graded with the dozer.
I just looked back at old pictures I took from when it was dug. It seems there are definitely sand and gravel veins at the very bottom. I didn’t notice anywhere else other than the deepest areas. I thought it seemed strange at the time of the dig, but as a novice I didn’t know that it may be an issue. If anything, I thought it would help fill the pond from below. The contractor is pretty reputable and does million dollar projects all over the area, he didn’t seem too concerned, so it was never addressed. Here are some photos…
https://ibb.co/m8YVryDhttps://ibb.co/9v0mYvqhttps://ibb.co/8XkHgF1https://ibb.co/3NxNKBgSo short of emptying, lining with more clay over the veins and compacting, what are my other options… do you believe something like damit or another polymer would work?
Another user said he was digging a sand point well to feed his pond. Maybe I dig one of those knowing there is Sandy ground just past 12’?
