How do they fill artificial lakes and ponds that you see on peoples property or at state parks, etc.?

Question

I've seen them all over the place, and I don't usually see anything that could be a source of water. No streams or anything.

Answer 1

My father-in-law owned 23 acres near Washington, Missouri and had a  small sized pond , I'd say 100' by 50' with a depth of about 20', dug in on his property.  It took the better part of a year or so for it to fill up, via Mother Nature.  Being on the downside of a slight hill helped a little.

Answer 2

Doesn't take much of a stream and it could be an underground spring or one that you did not see.

Answer 3

Farm ponds are typically lined with clay and retain water very well.  Rainfall is typically enough to keep them full.

Answer 4

Often times rain is enough to keep at OK level.  If not some may pump water in from city/county water of have a well.