2004 Water Supply Summary

Bill Ondrechen

IDWR

ACCUMULATED OBSERVED AND AVERAGE PRECIPITATION LOST-WOOD DIVIDE SNOTEL SITE

0

20

40

60

80

100

120

140

160

180

Oct

-99

Jan

-00

Ap

r-00

Jul-

00

Oct

-00

Jan

-01

Ap

r-01

Jul-

01

Oct

-01

Jan

-02

Ap

r-02

Jul-

02

Oct

-02

Jan

-03

Ap

r-03

Jul-

03

Oct

-03

Jan

-04

Ap

r-04

Jul-

04

INC

HE

S

OCT 1999 TO AUGUST 2004

AVERAGE

OBSERVED

38 inch deficit

AVERAGE ANNUAL PRECIPITATION 33.8

BEAR LAKE END OF MONTH STORAGE

0

200

400

600

800

1000

1200

1400

1600

Oct

-21

Oct

-25

Oct

-29

Oct

-33

Oct

-37

Oct

-41

Oct

-45

Oct

-49

Oct

-53

Oct

-57

Oct

-61

Oct

-65

Oct

-69

Oct

-73

Oct

-77

Oct

-81

Oct

-85

Oct

-89

Oct

-93

Oct

-97

Oct

-01

10

00

AC

FT

5923.65 FULL

5920

5918

5915

5911UPSTREAM STORAGE

RESTRICTION

5904

5902 MIN LEVEL

WATER YEARS 1922-2004E

LE

VA

TIO

NUPDATED THRU Sep 30, 2004

2004: UNIQUE APSECTS

• Near record low March and April precipitation greatly reduced water supply conditions

• Irrigation demand was lower than 2003 due to cooler temperatures and more rainfall

2004 April-July Runoff

• Bear Lake inflow 15.3 kaf 9 % of avg 9th lowest/ 78 years

• Snake R. nr Heise* 2387 67 % 19 / 99

• Big Wood at Hailey 125 49 % 13 / 77

• Boise R. nr Boise* 877 62 % 23 / 109

• Payette at HSB* 1209 75 % 23 / 85

• Weiser nr Weiser 256 61 % 19 / 78

• Snake at Weiser 2704 47 % 14 / 94

• Salmon at Whitebird 4030 69 % 19 / 94

• St. Joe at Calder 929 82 % 24 / 85

• * Unregulated or natural flow

SUMMARY HYDROGRAPH SALMON RIVER AT WHITEBIRD

0

20000

40000

60000

80000

100000

120000

140000

1-O

ct

15-O

ct

29-O

ct

12-N

ov

26-N

ov

10-D

ec

24-D

ec

7-Ja

n

21-J

an

4-F

eb

18-F

eb

3-M

ar

17-M

ar

31-M

ar

14-A

pr

28-A

pr

12-M

ay

26-M

ay

9-Ju

n

23-J

un

7-Ju

l

21-J

ul

4-A

ug

18-A

ug

1-S

ep

15-S

ep

29-S

ep

CF

S1911-2000

2004 APR-JUL VOLUME 4012 KAF 69 % OF AVERAGE

MAX OF RECORD

MIN

50%

2004

90%

10%

ACCUMULATED WATER USE ALFALFA HAY ABERDEEN IDAHO

0

5

10

15

20

25

30

35

40

451-

Ap

r

8-A

pr

15-A

pr

22-A

pr

29-A

pr

6-M

ay

13-M

ay

20-M

ay

27-M

ay

3-Ju

n

10-J

un

17-J

un

24-J

un

1-Ju

l

8-Ju

l

15-J

ul

22-J

ul

29-J

ul

5-A

ug

12-A

ug

19-A

ug

26-A

ug

2-S

ep

9-S

ep

16-S

ep

23-S

ep

30-S

ep

INC

HE

S

2001

2003 (HOT,DRY)

1992

1996 (AVG)

1993 (COOL,WET)

2004

USBR Agrimet Data

BIG WOOD RIVER BELOW MAGIC RESERVOIR

0

100

200

300

400

500

600

700

800

1960

1962

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

10

00

AC

FT

APR-SEP VOLUMES

DASHED LINE IS 4 YEAR MOVING AVERAGE

SNAKE RIVER NR HEISE NATURAL FLOW

0

1000

2000

3000

4000

5000

6000

7000

8000

900019

11

1915

1919

1923

1927

1931

1935

1939

1943

1947

1951

1955

1959

1963

1967

1971

1975

1979

1983

1987

1991

1995

1999

2003

WATER YEAR

1000

AC

FT

1911-2004

DASHED LINE IS 4 YEAR MOVING AVERAGE

UPPER SNAKE RIVER RESERVOIR SYSTEM

0

500

1000

1500

2000

2500

3000

3500

4000

4500

19

60

19

62

19

64

19

66

19

68

19

70

19

72

19

74

19

76

19

78

19

80

19

82

19

84

19

86

19

88

19

90

19

92

19

94

19

96

19

98

20

00

20

02

20

04

10

00

AC

FT

END OF SEPTEMBER STORAGE

CAPACITY

AVG

2004 APR-JUL NATURAL FLOW SNAKE R NR HEISE 2387 KAF 66% AVG

JCK+PAL+ISL+AMF

NATURAL FLOW BOISE RIVER NR BOISE

0.0

500.0

1000.0

1500.0

2000.0

2500.0

3000.0

3500.0

4000.018

96

1900

1904

1908

1912

1916

1920

1924

1928

1932

1936

1940

1944

1948

1952

1956

1960

1964

1968

1972

1976

1980

1984

1988

1992

1996

2000

WATER YEAR

1000

AC

FT

1896-2004

DASHED LINE IS 3 YR MOVING AVG

ANNUAL DIVERSION NEW YORK CANAL

0

200

400

600

800

1000

120019

2819

3019

3219

3419

3619

3819

4019

4219

4419

4619

4819

5019

5219

5419

5619

5819

6019

6219

6419

6619

6819

7019

7219

7419

7619

7819

8019

8219

8419

8619

8819

9019

9219

9419

9619

9820

0020

0220

04

1000

AC

FT

1928-2003

DROUGHT THRESHOLD

BOISE RIVER RESERVOIR SYSTEM

0

200

400

600

800

1000

12001

960

196

2

196

4

196

6

196

8

197

0

197

2

197

4

197

6

197

8

198

0

198

2

198

4

198

6

198

8

199

0

199

2

199

4

199

6

199

8

200

0

200

2

200

4

10

00

AC

FT

END OF SEPTEMBER STORAGE

CAPACITY

AVG

BEAR LAKE INFLOW

0

100

200

300

400

500

600

700

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

1000

AC

FT

APRIL THROUGH SEPTEMBER RAINBOW INLET CANAL VOLUME

BEAR LAKE ADJUSTED STORAGE RELEASE

0

200

400

600

800

1000

1200

14006-

May

13-M

ay

20-M

ay

27-M

ay

3-Ju

n

10-J

un

17-J

un

24-J

un

1-Ju

l

8-Ju

l

15-J

ul

22-J

ul

29-J

ul

5-A

ug

12-A

ug

19-A

ug

26-A

ug

2-S

ep

9-S

ep

16-S

ep

23-S

ep

30-S

ep

CF

S

OUTLET CORRECTED FOR RAINBOW, DINGLE AND DECREE ADJUSTMENT

2003

2004

TOTAL DIVERSION AND NATURAL FLOW 2004, 2003

0

200

400

600

800

1000

1200

1400

1600

1800

2000

30-A

pr

7-M

ay

14-M

ay

21-M

ay

28-M

ay

4-Ju

n

11-J

un

18-J

un

25-J

un

2-Ju

l

9-Ju

l

16-J

ul

23-J

ul

30-J

ul

6-A

ug

13-A

ug

20-A

ug

27-A

ug

3-S

ep

10-S

ep

17-S

ep

24-S

ep

CF

S

NATURAL FLOW 2004

TOTAL DIV 2004

BRC 1889 right

NATURAL FLOW 2003

BEAR LAKE OUTLET TO CUTLER

333 cfs

LAST CHANCE SYSTEM APR-SEP DIVERSION

0

20

40

60

80

100

12019

70

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

1000

AC

FT

STORED WATER DIVERSION IN RED ( 2000-2004 ONLY)

WEST CACHE CANAL APR-SEP DIVERSION

0

10

20

30

40

50

6019

70

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

1000

AC

FT

STORED WATER DIVERSION SHOWN IN RED ( 2000-2004 ONLY )

CUB RIVER PUMPS APR-SEP DIVERSION

0

5

10

15

20

25

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

1000

AC

FT

STORED WATER DIVERSION SHOWN IN RED ( 2000-2004 ONLY )

BEAR RIVER CANALS APR-SEP DIVERSION

0

50

100

150

200

250

30019

70

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

1000

AC

FT

STORED WATER DIVERSION IN RED (2000-2004 ONLY)