Lamar, can you get a track hoe, backhoe or small mini-excavator near the pond? If you have the room, you could cut back the banks to create some shallow areas for the BG to spawn in, putting the dug dirt back in the pond to create more spawning area (make the sharp drop-off less steep). Don't make a "pocket", cut the banks back on a gradual radius. BG will spawn on durn near any pond bottom, but they prefer small sized gravel or sandy bottoms.