Lake Pend Oreille
This thoughtful commentary on Lake Pend Oreille was written by:"I'm just a humble Muckraker that also writes a neighborhood column for the Spokesman-Review." contact me at:hhuseland@aol.com |
I'm
reproducing portions of my Spokesman-Review, Handle Extra
story for those outside the paper's circulation area. This
version is slightly different due lack of editing.
An error, quoting Chip Corsi, Region 1 F&G Supervisor,
saying the following is incorrect. the quote was confused
with another: Chip points out correctly, that Bull trout and
Cutthroat trout would have gone that far upriver, but not
kokanee.
First the Cabinet Gorge Dam in Montana, chopped off the
river seven miles upstream. Removing the 75 or 80 miles of
upriver spawning habitat.
Lake Pend Oreille is dying. It isn’t dying from toxic waste
or pollution, but is dying economically. This pristine body
of water, once the home of commercial fishing, is in a slump
that many experts are afraid may be irreversible. The death
of this lake was caused by human interruption of the food
chain. Re-intervention to try to right the wrongs of the
past are in motion, but hold only small hope for recovery.
In this, the first of two parts, we are going to visit the
causes. Part two will address what is being done to mitigate
and thirdly, the results as projected. We will as well, talk
to business owners around the lake regarding the economic
effect of this crisis.
Many years ago, in 1925, Macinaw, a long lived char or Lake
Trout,” were planted in Lake Pend Oreille and priest Lake by
the then, “U.S. Fish Commission,” later reformed as the U.S.
Fish and Wildlife Commission. Land locked Sockeye Salmon,
locally referred to as kokanee, Blueback or Silvers, were
flushed down the Clark Fork River, from Flathead Lake in
Montana during the regular spring floods of the day. In
1941, Idaho Fish & Game, brought both Gerrard Rainbow Trout,
and later, in the sixties, Mysis shrimp from Kootenai Lake
in British Columbia, to Lake Pend Oreille.
The apparent thinking at the time, was Idaho needed trout
capable of attaining record size. It was also felt that
since Mysis Shrimp were present in Kootenai Lake, and was a
feed source for the kokanee, that they would be an
additional value. The problem though, was that shrimp feed
on the surface of the water at night, and go deep during
daylight hours. In Kootenai Lake, the West Arm being fairly
shallow, this caused no problems. In Lake Pend Oreille it
did. kokanee couldn’t reach the shrimp at the depths they
sank to in Lake Pend Oreille because of the 1150 foot depth
of the lake. In Lake Pend Oreille, the shrimp dive down 400
to 600 feet deep during daylight hours.
What the addition of Mysis Shrimp did do however, is create
a huge food source for the deep living Macinaw, and also
Whitefish, the largest species in terms of numbers in the
lake. creating an explosion in their juvenile population.
Macinaw, can live up to twenty years old,or longer, and
Gerrard Trout, seven to ten. Both, when attaining a size of
about sixteen inches, start feeding on smaller fish. Prior
to that they are basically insect eaters. The ideal size
from the Macinaw perspective, is the one to two year old
kokanee fry. The larger the predator grows, the larger fish
they consume.
After introduction in the Forties, both kokanee and Rainbow
Trout flourished in a sustainable pattern. The World Record
Gerrard Rainbow was caught in 1947, by Wes Hamlet. During
World War Two, hardly any fishing went on. In 1945-46 and
after, the untouched fishery produced huge numbers of
kokanee and the record Rainbow Trout of 37 pounds. At one
time, kokanee were fished commercially. Many old timers
remember their Fathers hand lining with jigs, for wash tubs
full of 12 to 15 inch kokanee. Commercial fishing was
finally closed in 1973. The Old smoke house still stands
sentinel at the south end of the Long Bridge in Sandpoint,
but long since stopped the major business of smoking kokanee.
While this was going on, the Mysis Shrimp were quietly
reproducing at phenomenal rates, without, seemingly any
natural enemies, at least those that could reach them. All
was still well until 1952. This was the year that two very
significant dams were built. Cabinet Gorge, on the Clark
Fork River in Montana and Albeni Falls on the Pend Oreille
River at Priest River, Idaho. These two dams were to the
Lake Pend Oreille fishery, the death knell, but for
different reasons.
First the Cabinet Gorge Dam in Montana, chopped off the
river seven miles upstream. Removing the 75 or 80 miles of
upriver spawning habitat. After the Clark Fork ceased to be
of use, only the strain of kokanee that had adapted to
spawning in the lake shore gravels were left. kokanee spawn
in the late fall, usually late November and early December.
Granite Creek, on the east side of Lake Pend Oreille and a
few very small creeks were left, mostly too steep for fish
to swim up. Albeni Falls was the final nail in their coffin.
During the 1960's, the Bonneville Power Administration
managed to convince the U.S. Army Corps of Engineers,
controllers of the dam, to radically lower the lake level,
producing more flow for the Columbia River system and
subsequently more Winter power generation.
That did it. kokanee, the key food fish for larger fish
began to disappear rapidly. They did this because in the
beginning, Albeni Dam lowered the lake level, after the
kokanee had spawned, thereby leaving redds or egg nests high
and dry. Even then, everyone was still in denial. This
practice continued until finally, in 1996, IDFG and the
Corps of Engineers reached agreement to lower the lake prior
to the kokanee spawn. Fish & Game Department closed fishing
for kokanee altogether in 2000. Avista ponied up large
amounts of cash for mitigation, but it began to look like to
little, too late. One such result of mitigation, was that
Idaho Fish & Game opened an office in Bayview, nestled at
the south end of the lake. The purpose of this office was to
establish an unprecedented massive effort to recover the
kokanee population.
It needs to be explained that kokanee are a Salmon that
spawns every fourth year, then dies. Using Buck Rogers like
equipment, Fish & Game cris-cross the lake all Summer long
using hydro-acoustic sonar. This equipment can type, size
and count the fish as it passes over them. Based on these
counts, here are the numbers for 2007, keeping in mind that
predation accounts for the first and second year.
Fry 1-2" 3.8 million
1st year 2.2 million
2nd year 72,400
3rd year 18,108
4th year, a statistical zero, with only a scattered few
spawners


