Hi Judi.
I garden on bedrock, thus plenty of soil building.
The area right in front of my house catches the rain water off the roof, so I thought a bog or rain garden would work. But we get an awful lot or rain, and the garden would eventually go; mould, mildew, muck, mud, and mosquitoes.
To remedy that, I dug down to the bedrock (2.5 feet) and put a pond liner in with an overflow. I now have a mot in front of my house with a walk way over it to the front door. Frogs love it, and they take care of the mosquito issue. Alas, I haven't taken the time to take pics of the mot, maybe when the warm weather returns.
I hope to post more recent pics of the pond shown in this
thread, to show how it has evolved.
Cheers! K