I forgot I had this. One winter I went out on the ice and drew an 8 by 8 foot grid pattern on the ice. I measured the coordinates of the pond edge at every grid intersection and I drilled holes and measured depth. Then I put all the data points into a CAD program and connected the dots. This picture is the result. Each contour line is 1 foot depth starting with the first one being 1 foot. My max depth in the section on the right is 6 feet, middle section 8 feet, section on left 4 feet. As you can see I've got a lot of structure and perhaps some areas I could section off. The total area of this pond is 1/2 acre.
