In cleaning out my pond, a T-shape cedar dock structure was removed. The boards are 5/4 x 6". Lengths range from 40" to 8'. I thought about repurposing the wood for a new dock, but now is a good time to build fish structure in the empty pond. What are some good wood designs to consider? The fish stocking plan is LMB -or- SMB, YP, FHM.

Horizontal platforms for the minnows?
Cube shaped cribs filled with something?
Teepee or A-frames?
Other?

Thanks.