<font color="blue">....where did you dispose of all the spoils Gerard? </font>
The front yard was pretty low so it's spread throughout the front yard, mostly by the garage and then around the perimeter of the pond. There is at least 4 feet of fill in spots next to the garage (compare photos).
As for depth and fish, it's only about 5 feet deep so I don't think that fish would do well in it (winters) unless you know something about what kind of fish that would.