Pond Boss Forums Thread Like Summary - A few questions about a botched pond job

Hey guys, just looking for some input to a few of my questions since I'm learning on the fly here.

So I had a contractor dig a pond that was supposed to be swimmable on my property in VT that was supposed to be 40x60 and 9 feet deep, fed by rain/gutters. The soil is sandy (soil type A I believe now) so we needed clay. Contractor dug the pit and then brought in blue grey clay to line the pond (1 foot thickness).

The pond ended up only being 5 and a half feet deep so we got into an argument. However, I don't think this was the only big detail that he overlooked.

1) After the clay is spread, should he have applied a layer of soil over the clay?

2) Should the clay layer be smooth without any excavator/skid steer tracks in it?

3) Should there be a clearly defined pond edge? Problem here is that there is a steep slope above the pond and I can just see lots of runoff coming off of it straight into the pond.

4) Should something go under the packed clay? I think its called compaction or something?

Sorry if I missed any details about the pond, as I'm very new to this and worried that I just have an expensive hole in the ground currently. It is filling up with rain water (currently 2 feet deep), but I'm just very worried that I'll have major issues with water quality.

The negative of this:

If done correctly the bottom should be very smooth as the compaction gets up optimal level the sheepsfoot should be compressing the ground less with each pass. I like to run it until the ground is smooth and develops a shine to it.

You can also pull a large sheepsfoot roller behind a dozer, but it won't be a vibratory one. The different lifts need to be knitted together with a sheepsfoot and not a smooth barrel roller. You will end up with a pond bottom that looks like pages in a book with a smooth barrel roller. Water can work it's way through each page, move horizontally until it finds another crack/fissure, go down a page, rinse and repeat until it leaks out of the pond. In a pond that has the lifts knitted together that won't happen - the water cannot move horizontally.