I just read your answers about "Building a raised wall for a pond." Although quite detailed, I am not very physics minded and hope someone will give me a thumbs up or down.
I have a pond that is about 16' x 30', 3 sides will be earthen and stone walls (of which, I am not so concerned) the 4th wall is block and masonry.
The wall I am concerned about is 2 concrete blocks high (16") and about 30' long. The first course is about 2-3" below grade.
I laid 4 courses of decorative wall block (the wall blocks weigh about 23 lbs each) about 4-6" behind the cement block wall, 1 course is below grade. I then filled the gap between the two walls with about 1000 lbs of concrete. The cement block was filled with ground and gravel and 1/2" x 4' rebar driven in each hole.
Is this sufficient of a wall to retain the pond water?