I've been thinking about doing something like that on part of my little puddle, but taking it down so that full pool made it about 3 foot deep and 4 foot wide, and cover it with 1 inch limestone. Mainly to increase spawning area, but also make the pond a little bigger. I could rent a small excavator and probably get it done in a weekend.

.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!