Replace the existing Corrugated Metal Pipe (CMP) culvert with a 42-inch Outside Diameter, High-Density Polyethylene (HDPE) culvert.
Install a duckbill-style elastomer (non-corrodible) check valve in conjunction with the HDPE culvert.
Modify the existing permeable structure adjacent to
the fish grow-out pond by removing and/or replacing the permeable structure material.
The permeable structure at the outlet will also be modified.
Replace the existing combined permeable structure and CMP pipe culvert with a stoplog weir structure.