Sam, I'm no expert, but my ears perked up when you said the dam was all clay & rocks. Rocks cause obvious problems, but too much clay can create issues just as too little clay. You want a mix of other soils with the clay, otherwise the dam will tend to crack as it goes through a wet/dry cycle.

Of course, you might have just meant you had adequate clay for the job, in which case this is not a concern. Keep an eye on things, my neighborhood lake washed out ten years ago and caused a lot of problems due to an improperly constructed dam!

Last edited by anthropic; 01/05/22 02:56 AM.
7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160