I'm done with the excavation and am now lining my impoundment pond with what I think is a good quality clay, as described by various posts here on your wonderful website. I've got 2 feet of compacted clay on the dam, at about a 2:1 slope. Today we excavated a trench about 1/2 of the way into the dam, (about 25 feet) and placed a dry hydrant so we can draw water for fire protection here in Colorado : 6" PVC pipe that starts about 4 foot above the bottom and exits by the road on top of the dam, with 2 45 degree angles so that it does not go all the way thru the dam. However, it does go into the rotten granite and sandy soil that makes up that part of the dam. I am about to fill in the trench and after spending lots of my money on bringing in clay to line this previously leaking pond, I'm worried that I'll have water leaking around the pipe.
Do I need an antiseep collar or will just careful packing of the clay around the pipe be good enough since the pipe does not go thru the dam? If I use a collar, how far back along the pipe does it go? IF I pack the clay, how do you pack it under the pipe?
I've posted some other questions lately as I've been working on this project and have appreciated all the responses. So far so good! Barbara