"Gil" informs visitors to Malheur National Wildlife Refuge of the carp problems.
Malheur Lake is 7 miles by 9 miles and once had abundant vegetation and millions of birds using it annually. Now the lake is mostly devoid of vegetation.
Malheur NWR has a labyrinth of diversions and water control structures.
Fish screen on a diversion from the Blitzen River. The automatic brush that keeps the screen clear of debris is circled.
Fish ladder on the Blitzen River leading to a fish trap.
Lifting the fish trap from the ladder.
Small male common carp captured in the trap.