My pond is a water table pond and the back side of it is shallow, about 2' max. The bottom is sandy with a few inches of organic material on top of that.

I'd like to build a land walkway over the top of this. It's about 50-60 feet in length, and I'd do the project in the summer when it's usually close to dry. I have access to cement blocks, both broken and whole. I was thinking about stacking cement blocks something like 3 wide and 3-4 high for the entire length. Then, maybe filling them, and over flowing them with some sort of settling stone.

Does this seem like a reasonable idea? Has anyone done something similar to this?