on historical passage timing, the run of endangered Snake River sockeye salmon
through the lower Snake River dams is nearly complete, according to Russ Kiefer
of the Idaho Department of Fish and Game.
just a few of the fish have been seen in the lower Salmon River and none have
reached as far as the Sawtooth Basin, their final stop and spawning grounds.
of this week, passage at Ice Harbor Dam, the lowest of the four dams, is
generally 97 to 98 percent complete, while passage at the upper dam, Lower
Granite, is typically 80 to 90 percent complete, Kiefer said at the July 26
interagency Technical Management Team meeting.
a total fish run estimate this year of just 401 fish, by July 25 some 225 fish
had passed Lower Granite Dam. The Ice Harbor Dam count of 382 likely included
some mid-Columbia fish that will eventually turn around and leave the Snake
River, Kiefer said.
on track and toward the end of the (Snake River) sockeye run,” Kiefer said. He
called the management of the river for sockeye, particularly with the large
turbine out at Dworshak Dam, a success. Snake River sockeye are listed as
endangered under the federal Endangered Species Act.
CBB, July 21, 2017, “Dworshak’s Largest Turbine Out Another Year; Poses
Challenges For Salmon Management,” http://www.cbbulletin.com/439312.aspx)
year on the same date, some 877 sockeye had passed Ice Harbor and the 10-year
average is 890. For Lower Granite Dam, the count last year was 767 and the
10-year average is 957.
run of sockeye was downgraded last week by the US v Oregon Technical Advisory
Committee to 88,200 fish as measured at the Columbia River mouth. The preseason
forecast was 198,500 sockeye, with 1,400 of those fish thought to be Snake
River sockeye listed as endangered under the federal Endangered Species Act.
TAC had previously downgraded the run to 90,400 fish. The latest run size
estimate of 401 Snake River sockeye is based on TAC’s final run size of 88,200
87,069 sockeye had crossed Bonneville Dam as of July 25, but the daily passage
is falling quickly, with 173 fish passing the dam on July 20, but just 85 on
July 25. Last year on the same date, 339,935 sockeye had passed and the 10-year
average is 314,167.
only concerning issue is the conversion rate between Bonneville and The Dalles
dams,” Kiefer said, adding that just 76 percent of the fish that passed
Bonneville Dam also made it past The Dalles Dam. The average is an 84 percent
conversion rate, he said.
63,494 sockeye had passed The Dalles Dam as of July 25. The count last year was
286,307 and the 10-year average is 267,502.
57,602 sockeye had passed McNary Dam, a conversion rate from The Dalles of
about 91 percent. Last some 287,368 fish had passed and the 10-year average is
CBB, July 21, 2017, “Summer Chinook, Sockeye Runs Downgraded; Treaty Commercial
Fishery Extended,” http://www.cbbulletin.com/439313.aspx
July 14, 2017, “Harvest Managers Approve More Tribal Fishing, Concerns
Expressed Over Low Sockeye, Summer Steelhead,” http://www.cbbulletin.com/439267.aspx