Formal pond/rubber liner/cement edging. Please help!

[Roansdad]

I am about to dig out my new pond. I'm aiming for 12/6/4' pure rectangle. My last pond was informal with flagstone edging. I want this to have a formal hard look with cement edging and a small basin and overflow at one end for water return. How do I go about the edging?? I'm thinking dig a collar that is about 4" thick and 6-8" high The liner would be under the cement and then some type of capping like pavers or the cement itself extending away from the water. This should allow the water level to drop without exposing the liner and give me the look I want.

But it can't be that easy. What am I missing?? Rebar? Mesh?? Forms?? To thick?? Thin??
I hope u can help
Thank you.

 

[whiskey]

Are you after some thing like this

 

[Roansdad]

yes thats pretty close to what i want but with some edging under the pavers to allow for buffer when the water drops without the liner being exposed, and more closer to this picture

 

[sissy]

The hardest part you may encounter is hiding the filter .It is pretty easy just liners seem to be harder to fold and hide on those type ponds .i know mine was

 

[addy1]

Have your liner folded under the cap, go above the water level on the outside edge. Have your cap below the normal and lowest water level, so when the water drops you will just see the cap not the liner.