(Little Underwater Neighborhood Keepers Encompassing Rheotactic Salmonids)

A LUNKER structure, first developed and used in Wisconsin, is an engineered, overhanging-bank structure designed to provide habitat for aquatic fishes while also improving bank stability. A LUNKER is typically 8 ft long, by 1 to 2 ft tall, by 3 ft deep, constructed of hardwood or rock, with an open front an ends. The toe of the outer bank of the stream is leveled, then the LUNKER is placed on the level bed and 0.5 inch, x 7 ft long sections of rebar are driven through pre-drilled holes and into the stream substrate, anchoring the LUNKER to the stream bed. The area bankward of the LUNKER is filled with rip-rap, and either large stones, or soil and a circular coir fiber roll are positioned on the top of the LUNKER.