Hi guys I'm new to the forum and to the whole pond arena and was hoping to get some advice in here. I purchased a existing pond that was originally used for irrigation. The pond is in need of repair. I know the old metal stand pipe is rusted out causing a depression thru the middle of the dam where the soil gets washed out from the inside out. My plan is to have it dug out in the summer and put in a syphion system. I've begun lowering the pond and there is a lot of muck and sediment that has filled in. I hope to dry it out enough this summer and have a dozer push all the muck over the back side of the dam as I don't have enough free board as it is. After this is done, will I have to re-seal the pond in some way or will it just fill right back up? This pond has been around 100+ years as far as I know. The muck is about two to three feet deep.