Findings of congress
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Findings of Congress. “ Various species of fish, wildlife, and plants have been rendered extinct as a consequence of growth untempered by adequate conservation.”

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Findings of Congress

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Findings of congress

Findings of Congress

  • “Various species of fish, wildlife, and plants have been rendered extinct as a consequence of growth untempered by adequate conservation.”

  • “These species are of esthetic, ecological, educational, historical, recreational, and scientific value to the nation and its people.”ESA Sec. 2

  • The Endangered Species Act is the last resort for species at risk of extinction.

  • Under the ESA, the National Marine Fisheries Service (NOAA Fisheries) is accountable to ensure that salmon and marine species are preserved for future generations.


Federal columbia river power system fcrps

Federal Columbia River Power System (FCRPS)

  • Dams and reservoirs on the mainstem Columbia and Snake rivers and their tributaries comprise the FCRPS.

  • Operation of this dam and reservoir system is a federal action and subject to ESA consultation.


Effects of dams on salmonids

Effects of Dams on Salmonids

  • Restrict access to habitat

  • Alter habitat

  • Alter hydrology

  • Alter gradient

  • Passage hazard

  • Creates recreational opportunities and expectations.

  • Creates opportunities for further water development within the basin.


Actions called for in biological opinions

Actions called for in biological opinions

  • Dam Operations

  • Dam Modifications

  • Spill at Dams

  • Flow Measures

  • Research Monitoring & Evaluation

  • Transportation

  • Hatcheries

  • Habitat


Flow management program

Flow Management Program

  • Spring Season

    • Yearling migrants

  • Summer Season

    • Subyearling migrants


Spring flow management

Spring Flow Management

  • Largely achieved by having reservoirs operate no lower than their flood control rule curves by April 10.

  • Rationale is it passes the freshet into the river as opposed to refilling reservoir space.


Summer flow management

Summer Flow Management

  • Goal is to refill all storage project to full pool by June 30.

  • Draft reservoirs within draft limits to increase river flow during the summer months.


Summer flow management volumes

Summer Flow Management Volumes


Findings of congress

Chief Joseph

Wells

GrandCoulee

Rocky Reach

Rock Island

Wanapum

Ice Harbor

Priest Rapids

Lower Granite

Little Goose

Lower Monumental

McNary

John Day

Bonneville

Hells Canyon

The Dalles

Oxbow

Brownlee


Findings of congress

Fall Chinook Adult Returns to Bonneville Dam

500000

450000

400000

350000

300000

# of Adults

250000

adult returns

200000

150000

100000

50000

0

1955

1957

1959

1961

1963

1965

1967

1969

1971

1973

1975

1977

1979

1981

1983

1985

1987

1989

1991

1993

1995

1997

1999

2001

Year


Findings of congress

Wild Steelhead Adult Returns to Bonneville Dam

160,000

140,000

120,000

100,000

# of adults

80,000

adult returns

60,000

40,000

20,000

0

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

Year


Findings of congress

Spring Chinook Adult Returns to Bonneville Dam

450,000

400,000

350,000

300,000

250,000

# of adults

adult returns

200,000

150,000

100,000

50,000

0

1960

1962

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

Year


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