One additional note about placement of gravel or sand to beach area. If the pond is new and not filled with water, it is best to create a curb or ridge that outlines the area of the beach. This "curbing" or wall (8" to 14" high) will keep the beach material from washing off around the beach's edges & into the depths. In my pond I had the bulldozer operator push up a small dike of clay to outline the areas of the beach to act as a curb to hold the gravel in place.
If the pond is already full this obviously cannot be done. For beaches that have a steep slope beyond the beach area, the sand or gravel on the edges will thin out & work its way down the slope. If the slope is gradual all the way to deep water then no real problem with sand/gravel loss.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management