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Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501 Station Name: Gila River @ Olberg Station ID Number History: 780 since 04/12/95 Station Type: Rain / Stream Data Begins: 04/12/1995 Years Since Installation: 20.47 (as of 10/01/15) Data Repeater: Sacaton Peak County: Pinal Latitude: 33º 05’ 13.4” (33.08706) Longitude: 111º 41’ 13.2” (111.68700) Elevation: 1,305 ft. msl Location: Gila River at Olberg Bridge, 3 mi. ENE of Sacaton Data Record: Incomplete Months: None Missing Months: None Remarks: Records Good 0 2 4 6 8 10 12 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Precipitation (in) Water Year Gila River @ Olberg

Station Name: Gila River @ Olbergalert.fcd.maricopa.gov/alert/Rain/Master/0780.pdf · Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

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Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Station Name: Gila River @ Olberg

Station ID Number History: 780 since 04/12/95

Station Type: Rain / Stream

Data Begins: 04/12/1995

Years Since Installation: 20.47 (as of 10/01/15)

Data Repeater: Sacaton Peak

County: Pinal

Latitude: 33º 05’ 13.4” (33.08706)

Longitude: 111º 41’ 13.2” (111.68700)

Elevation: 1,305 ft. msl

Location: Gila River at Olberg Bridge, 3 mi. ENE of

Sacaton

Data Record:

Incomplete Months: None

Missing Months: None

Remarks: Records Good

0

2

4

6

8

10

12

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

Pre

cip

itat

ion

(in

)

Water Year

Gila River @ Olberg

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Data Statistics for Period of Record:

Number of storms greater than 1 inch in 24 hours: 21

Number of storms greater than 2 inches in 24 hours: 3

Number of storms greater than 3 inches in 24 hours: 0

Approx. Tr

Greatest 15 minute total: 0.87" on 07/14/14 16 years

Greatest 1 hour total: 1.85" on 09/18/04 52 years

Greatest 3 hour total: 2.05" on 09/18/04 41 years

Greatest 6 hour total: 2.28" on 07/29/01 38 years

Greatest 24 hour total: 2.52" on 09/18/04 13 years

Greatest 72 hour total: 2.52” on 09/18/04 7 years

Water Year Totals: (Mean of Complete Water Years [20] = 5.91 inches)

Water Year Total Water Year Total Water Year Total

2020 2010 6.14 2000 2.20

2019 2009 5.43 1999 4.17

2018 2008 7.76 1998 7.99

2017 2007 4.65 1997 3.93

2016 2006 6.81 1996 3.43

2015 5.20 2005 9.72 1995 M

2014 8.23 2004 6.97 1994

2013 4.65 2003 6.77 1993

2012 6.50 2002 5.20 1992

2011 2.17 2001 10.20 1991

M: One or more months contain partial or missing data

Design Rainfall for this Geographic Location:

Click this link for Point Precipitation Frequency Estimates

(Annual Maximum Series) in Tabular and Graphical Formats

from NOAA Atlas 14, Volume I, Version 5

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River at Olberg (gage # 780) for Water Year 2015

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

-------------------------------------------------------------------------------

1 .04 .04

2 .28 3 .04

4 .59 .28

5 .08

6 .04 7 .20 .04

8 .39 .08

9

10 11 .08

12 .16 .08

13 .04 .04 .04

14 .04 15 .75

16 .04

17 .16 .04

18 .08 .12 19 .08 .04

20

21 .08

22 .04 23

24

25 .08 .04

26 .04 27 .04

28

29 .12 ----

30 .59 ---- 31 ---- .08 .20 ---- ---- ---- .04 ----

-------------------------------------------------------------------------------

SUM 0.39 0.00 0.87 0.98 0.04 0.43 0.12 1.06 0.12 0.24 0.59 0.35

ACC 0.39 0.39 1.26 2.24 2.28 2.72 2.83 3.90 4.02 4.25 4.84 5.20

MAX 0.39 0.00 0.59 0.59 0.04 0.28 0.08 0.75 0.08 0.12 0.20 0.08

NO. 1 0 4 5 1 3 2 3 2 4 6 7

Maximum Daily Rainfall 0.75

Maximum Monthly Rainfall 1.06

Total Annual Rainfall 5.20

Number of Days with Rain 38

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River at Olberg (gage # 780) for Water Year 2014

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

-------------------------------------------------------------------------------

1 .75

2 .08 .04 3 .28

4 .04

5 .04

6 .31 7

8 .04 .98

9 .28

10 .12 11

12 .08

13 .04

14 1.46 15

16

17

18 19

20 .43

21 .04 .04 .04

22 1.57 23 .43 .04

24

25

26 .08 27 1.02

28

29 ----

30 ---- 31 ---- ---- ---- ---- ----

-------------------------------------------------------------------------------

SUM 0.00 2.13 0.47 0.00 0.00 0.83 0.08 0.00 0.00 1.85 0.28 2.60

ACC 0.00 2.13 2.60 2.60 2.60 3.43 3.50 3.50 3.50 5.35 5.63 8.23

MAX 0.00 1.57 0.43 0.00 0.00 0.75 0.08 0.00 0.00 1.46 0.12 1.10

NO. 0 5 2 0 0 2 1 0 0 5 4 4

Maximum Daily Rainfall 1.57

Maximum Monthly Rainfall 2.60

Total Annual Rainfall 8.23

Number of Days with Rain 23

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River at Olberg (gage # 780) for Water Year 2013

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

-------------------------------------------------------------------------------

1

2 3

4

5

6 .35 7

8 .51 .12 .16

9 .04 .55

10 .04 11

12

13 .08

14 .28 15 .35

16

17

18 19 .08

20 .35 .08

21

22 .04 23

24

25

26 1.10 .16 .16 27 .04 .04

28

29 ----

30 .04 ---- .08 31 ---- ---- ---- ---- ----

-------------------------------------------------------------------------------

SUM 0.00 0.08 0.83 1.14 0.35 0.51 0.12 0.00 0.00 0.31 0.59 0.71

ACC 0.00 0.08 0.91 2.05 2.40 2.91 3.03 3.03 3.03 3.35 3.94 4.65

MAX 0.00 0.04 0.35 1.10 0.35 0.51 0.12 0.00 0.00 0.16 0.35 0.55

NO. 0 2 5 2 1 1 1 0 0 4 3 2

Maximum Daily Rainfall 1.10

Maximum Monthly Rainfall 1.14

Total Annual Rainfall 4.65

Number of Days with Rain 21

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River at Olberg (gage # 780) for Water Year 2012

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1

2 3 .16

4 .04

5 .08

6 7 .12 .24

8

9 .08

10 .08 11 .20 .04

12 .55 .39

13 .94 .12

14 .12 .04 .47 15 .04

16 .04

17

18 .04 .35 19

20

21 .04 .08 .16

22 .04 23 .12

24 .04

25

26 27

28 .04 .24

29 1.61

30 ---- 31 ---- ---- ---- ---- ----

------------------------------------------------------------------------------

SUM 0.00 0.24 1.69 0.04 0.12 0.35 0.04 0.08 0.04 3.19 0.35 0.35

ACC 0.00 0.24 1.93 1.97 2.09 2.44 2.48 2.56 2.60 5.79 6.14 6.50

MAX 0.00 0.12 0.94 0.04 0.12 0.35 0.04 0.08 0.04 1.61 0.16 0.24

NO. 0 3 4 1 1 1 1 1 1 9 4 3

Maximum Daily Rainfall 1.61

Maximum Monthly Rainfall 3.19

Total Annual Rainfall 6.50

Number of Days with Rain 29

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River at Olberg (gage # 780) for Water Year 2011

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1 2 .12

3

4

5 .24 6

7

8

9 10 .04

11 ---- .12

12

13 .04 14 ----

15 ----

16 ---- .16

17 ---- .04 18 .16

19 .35

20 .04

21 .04 22 ----

23 .16

24

25 26

27 .28

28

29 .31 ---- 30 .04 ----

31 ---- ---- ---- ---- .04 ----

------------------------------------------------------------------------------

SUM 0.39 0.00 0.71 0.00 0.67 0.00 0.00 0.00 0.00 0.20 0.16 0.04

ACC 0.39 0.39 1.10 1.10 1.77 1.77 1.77 1.77 1.77 1.97 2.13 2.17

MAX 0.24 0.00 0.31 0.00 0.35 0.00 0.00 0.00 0.00 0.12 0.16 0.04

NO. 3 0 5 0 3 0 0 0 0 3 1 1

Maximum Daily Rainfall 0.35

Maximum Monthly Rainfall 0.71

Total Annual Rainfall 2.17

Number of Days with Rain 16

Annual Total (mm): 55 Days Down: 9.50 Gage 0780 down from 04/21 20:11 (56) through 04/23 20:11 (56) due to data collision; no rain fell. Gage 0780 down from 10/13 05:12 (9) through 10/18 11:12 (9) due to repeater failure; no rain fell. Gage 0780 down from 11/10 05:12 (10) through 11/12 11:12 (10) due to battery failure; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila R. @ Olberg (gage # 780) for Water Year 2010

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1

2 3

4

5

6 7 .16 .12 .43

8 .04 .28

9 .04

10 11

12

13 .08

14 .04 15

16

17 .08

18 .04 19 .75

20 .12 .04

21 1.14 .04 .47

22 .08 .39 .08 .08 23 .12 ----

24 ---- ----

25

26 27 .20

28 .16 .28

29 ---- .51

30 ---- 31 ---- ---- ---- ---- .39 ----

------------------------------------------------------------------------------

SUM 0.00 0.04 0.28 2.87 0.55 0.87 0.00 0.00 0.00 0.91 0.63 0.00

ACC 0.00 0.04 0.31 3.19 3.74 4.61 4.61 4.61 4.61 5.51 6.14 6.14

MAX 0.00 0.04 0.16 1.14 0.28 0.43 0.00 0.00 0.00 0.51 0.47 0.00

NO. 0 1 3 8 5 4 0 0 0 2 3 0

Maximum Daily Rainfall 1.14

Maximum Monthly Rainfall 2.87

Total Annual Rainfall 6.14

Number of Days with Rain 26

Notes:

Annual rainfall in millimeters: 156 Gage 0780 down from 12/23 05:09 (8) through 12/25 17:08 (8) due to data collision; no rain fell. Gage 0780 down from 08/22 15:33 (156) through 08/25 11:01 (156) due to transmitter failure; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila @ Olberg (gage # 780) for Water Year 2009

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------ 1

2 .08

3 .24 .04

4 .16 .12 5 .04

6

7

8 .04 .28 9 .28

10

11 .31

12 .12 .12 13 .28

14

15

16 .43 .43 17 .31 .08 .08

18 .04 .16 .24

19 .04

20 21

22 .08 .04 .16 .04

23 .16

24 25 .12 .12 ----

26 .24 .20 ---- .04 ----

27 .16 ----

28 ---- 29 ---- ----

30 ---- ----

31 ---- ---- ---- ---- .16 ----

------------------------------------------------------------------------------ SUM 0.00 0.39 1.38 0.20 0.63 0.59 0.43 0.16 0.00 0.94 0.47 0.20

ACC 0.00 0.39 1.77 1.97 2.64 3.23 3.66 3.82 3.82 4.76 5.24 5.43

MAX 0.00 0.24 0.43 0.16 0.28 0.43 0.31 0.16 0.00 0.24 0.28 0.12

NO. 0 2 8 2 3 2 2 1 0 8 3 3

Maximum Daily Rainfall 0.43

Maximum Monthly Rainfall 1.38

Total Annual Rainfall 5.43

Number of Days with Rain 34

Notes:

Annual rainfall in millimeters: 138 Total down-time: 9.04 days Gage 0780 down from 3/25 09:53 (84) through 3/31 15:54 (84) due to failure of Sacaton repeater, no rain fell. Gage 0780 down from 8/24 22:33 (131) through 8/27 12:42 (131) due to transmitter failure; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila R. @ Olberg (gage # 780) for Water Year 2008

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1 .20

2 3

4 .55

5

6 .04 7 .24 .35

8 .28

9 .04

10 .20 1.14 .24 11 .31 .04

12

13 .04

14 .04 15 .39

16

17

18 19

20

21

22 .79 23 .04 .20

24 .08

25 .20

26 27 .67 .08

28 .31

29 .04

30 1.06 ---- 31 ---- ---- ---- ---- .16 ----

------------------------------------------------------------------------------

SUM 0.00 1.06 1.22 1.06 0.94 0.00 0.00 0.91 0.00 1.26 0.63 0.63

ACC 0.00 1.06 2.28 3.35 4.29 4.29 4.29 5.24 5.24 6.50 7.13 7.76

MAX 0.00 1.06 0.31 0.67 0.55 0.00 0.00 0.79 0.00 1.14 0.31 0.24

NO. 0 1 5 3 2 0 0 3 0 4 5 3

Maximum Daily Rainfall 1.14

Maximum Monthly Rainfall 1.26

Total Annual Rainfall 7.76

Number of Days with Rain 26

Notes:

Annual rainfall in millimeters: 197 Total down-time: 0.00 days

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila @ Olberg (gage # 780) for Water Year 2007

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1

2 3

4

5

6 .04 7

8

9

10 11

12 .04

13 .04 .04

14 .04 .04 15

16 .16

17 .04

18 19 .12 .31

20 .08

21 .04 .63

22 .16 .55 .04 23 .12 .35

24 .20 .04

25 .51 .12

26 27 ----

28 .04 ---- .24

29 ---- ---- .04

30 .12 ---- ---- .04 31 ---- ---- ---- ---- .47 ----

------------------------------------------------------------------------------

SUM 0.24 0.00 0.20 0.28 0.47 0.67 0.08 0.00 0.00 2.32 0.39 0.00

ACC 0.24 0.24 0.43 0.71 1.18 1.85 1.93 1.93 1.93 4.25 4.65 4.65

MAX 0.20 0.00 0.16 0.12 0.31 0.55 0.04 0.00 0.00 0.63 0.16 0.00

NO. 2 0 2 3 4 2 2 0 0 8 5 0

Maximum Daily Rainfall 0.63

Maximum Monthly Rainfall 2.32

Total Annual Rainfall 4.65

Number of Days with Rain 28

Notes:

Annual rainfall in millimeters: 118 Total down-time: 5.00 days

Gage 0780 down from 6/26 13:51 (49) through 7/01 13:51 (49) due to data collision; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River @ Olberg (gage # 780) for Water Year 2006

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------ 1

2 1.18

3

4 5 .08

6

7 .43

8 .04 9 .04

10

11 2.36

12 .04 .47 13 .43

14 .04

15

16 17 .08

18 .04

19 .16

20 .04 21

22

23 .04

24 .24 25 .55

26 .12

27 .35

28 29 ----

30 ---- .08

31 ---- ---- ---- ---- ----

------------------------------------------------------------------------------ SUM 0.20 0.00 0.00 0.00 0.00 2.56 0.00 0.00 0.00 1.18 1.22 1.65

ACC 0.20 0.20 0.20 0.20 0.20 2.76 2.76 2.76 2.76 3.94 5.16 6.81

MAX 0.08 0.00 0.00 0.00 0.00 2.36 0.00 0.00 0.00 0.55 0.47 1.18

NO. 4 0 0 0 0 3 0 0 0 5 5 3

Maximum Daily Rainfall 2.36

Maximum Monthly Rainfall 2.56

Total Annual Rainfall 6.81

Number of Days with Rain 20

Notes:

Annual rainfall in millimeters: 173 Total down-time: 0.00 days

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River @ Olberg (gage # 780) for Water Year 2005

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep ------------------------------------------------------------------------------

1

2 1.57

3 .94 .08 4 .31 .43

5 .16 .20

6 .04 .08

7 8 .51

9

10 .12

11 .75 12 .51 .04

13

14 .31

15 16

17 .08

18 .08

19 .59 20 .04

21 .12 .04

22 .04 .08 .28 .31

23 .04 .16 24 .04 .08

25

26 .28

27 .08 28 .39 .24

29 .28 -----

30 ----- .28

31 ----- ----- ----- ----- .16 ----- ------------------------------------------------------------------------------

SUM 0.55 0.16 0.79 1.73 2.48 0.28 0.16 0.31 0.00 0.75 2.52 0.00

ACC 0.55 0.71 1.50 3.23 5.71 5.98 6.14 6.46 6.46 7.20 9.72 9.72

MAX 0.39 0.08 0.31 0.94 0.75 0.20 0.16 0.24 0.00 0.31 1.57 0.00

NO. 3 3 4 4 9 2 1 2 0 3 5 0

Maximum Daily Rainfall 1.57

Maximum Monthly Rainfall 2.52

Total Annual Rainfall 9.72

Number of Days with Rain 36

Notes:

Annual rainfall in millimeters: 247 Total down-time: 0.00 days

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River @ Olberg (gage # 780) for Water Year 2004

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1

2 .47 3 .08 .04

4 .28

5 .12

6 7

8

9

10 .04 11 .16

12 .47

13 .20

14 .04 15 .20

16

17

18 2.13 19 .39

20

21 .12

22 .59 23 .24 .75

24 ----- .04 .04 .04 .04

25 ----- .08

26 27 .43

28

29

30 ----- 31 ----- ----- ----- ----- -----

------------------------------------------------------------------------------

SUM 0.00 0.47 0.20 1.06 0.87 0.39 0.55 0.00 0.00 0.51 0.39 2.52

ACC 0.00 0.47 0.67 1.73 2.60 2.99 3.54 3.54 3.54 4.06 4.45 6.97

MAX 0.00 0.47 0.16 0.59 0.75 0.28 0.47 0.00 0.00 0.43 0.20 2.13

NO. 0 1 2 5 3 2 3 0 0 3 2 2

Maximum Daily Rainfall 2.13

Maximum Monthly Rainfall 2.52

Total Annual Rainfall 6.97

Number of Days with Rain 23

Notes: Annual rainfall in millimeters: 177 Total down-time: 3.00 days Gage 780 down from 10/23 22:46 (0) through 10/26 22:46 (0) for unknown reason; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River @ Olberg (gage # 780) for Water Year 2003

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------ 1 .04 .04

2 .08

3

4 5

6

7

8 .24 9

10

11

12 13 1.10

14 .43 1.14

15 .04 .04

16 .20 17 .08

18

19

20 21 .04 .04

22

23 .55 .04

24 .24 25 .28 -----

26 .39 .28 -----

27 -----

28 .12 ----- 29 .35 ----- .91

30 .12 -----

31 ----- ----- ----- ----- -----

------------------------------------------------------------------------------ SUM 0.00 0.47 0.67 0.00 2.20 0.31 0.04 0.00 0.00 1.06 1.50 0.51

ACC 0.00 0.47 1.14 1.14 3.35 3.66 3.70 3.70 3.70 4.76 6.26 6.77

MAX 0.00 0.35 0.55 0.00 1.10 0.20 0.04 0.00 0.00 0.91 1.14 0.24

NO. 0 2 3 0 4 3 1 0 0 3 4 3

Maximum Daily Rainfall 1.14

Maximum Monthly Rainfall 2.20

Total Annual Rainfall 6.77

Number of Days with Rain 23

Notes: Total annual rainfall in millimeters: 172 Total down-time: 4.61 days Gage 0780 down from 9/24 20:13 (192) through 9/29 10:58 (192) due to programming error; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila @ Olberg (gage # 0780) for Water Year 2002

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

------------------------------------------------------------------------------

1

2 3

4 .83

5

6 .04 .35 7 .16 .39

8 .04

9 .43 .20

10 1.10 11 .12 .04

12

13

14 .35 15 .04

16

17

18 19

20

21

22 23 .94

24 .04

25

26 27

28

29 -----

30 .12 ----- 31 ----- ----- ----- ----- -----

------------------------------------------------------------------------------

SUM 0.16 0.04 0.98 0.12 0.00 0.04 0.00 0.00 0.00 1.77 0.00 2.09

ACC 0.16 0.20 1.18 1.30 1.30 1.34 1.34 1.34 1.34 3.11 3.11 5.20

MAX 0.16 0.04 0.83 0.12 0.00 0.04 0.00 0.00 0.00 0.94 0.00 1.10

NO. 1 1 3 1 0 1 0 0 0 4 0 5

Maximum Daily Rainfall 1.10

Maximum Monthly Rainfall 2.09

Total Annual Rainfall 5.20

Number of Days with Rain 16

Notes: Total annual rainfall in millimeters: 132 Total down-time: 0.00 days

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila @ Olberg (gage # 780) for Water Year 2001

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep ------------------------------------------------------------------------------

1

2 ----

3 ---- 4 ----

5 .12 ----

6 .91 .35 ----

7 .59 ---- 8 .08 .04 .16 ----

9 .24 .16

10 .04 .08 .08

11 .04 12 .31 ----

13 ----

14 .16 ----

15 16 .24 .08

17 .04

18

19 20

21 .31 .43

22 .91 .35

23 .47 24

25 .04 .04 .16

26

27 .31 .43 .08 28 .28 .08 .08

29 ---- 1.73

30 .12 ---- .59

31 .08 ---- ---- ---- ---- ---- ------------------------------------------------------------------------------

SUM 2.56 0.98 0.00 1.38 0.39 0.83 1.26 0.00 0.04 2.48 0.28 0.00

ACC 2.56 3.54 3.54 4.92 5.31 6.14 7.40 7.40 7.44 9.92 10.20 10.20

MAX 0.91 0.91 0.00 0.43 0.16 0.59 0.43 0.00 0.04 1.73 0.16 0.00

NO. 9 2 0 6 5 3 4 0 1 3 3 0

Maximum Daily Rainfall 1.73

Maximum Monthly Rainfall 2.56

Total Annual Rainfall 10.20

Number of Days with Rain 36

Notes: Annual rainfall in millimeters: 259 Total down-time: 13.44 days Gage 780 down from 5/11 11:22 (188) through 5/15 08:39 (188) due to battery failure; no rain fell. Gage 780 down from 7/03 08:34 (189) through 7/09 09:51 (189) due to battery failure; no rain fell. Gage 780 down from 8/01 10:39 (252) through 8/04 22:40 (252) for unknown reason; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila @ Olberg (gage # 780) for Water Year 2000

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep ------------------------------------------------------------------------------

1

2

3 4

5 .08

6 1.30

7 .39 .08 8

9

10

11 12 .04

13

14

15 16

17 .04

18 .08

19 20

21

22 .04

23 24

25 .04

26

27 28 .04 .04

29

30 ---- .04

31 ---- ---- ---- ---- ---- ------------------------------------------------------------------------------

SUM 0.00 0.00 0.00 0.00 0.04 1.81 0.00 0.00 0.04 0.00 0.31 0.00

ACC 0.00 0.00 0.00 0.00 0.04 1.85 1.85 1.85 1.89 1.89 2.20 2.20

MAX 0.00 0.00 0.00 0.00 0.04 1.30 0.00 0.00 0.04 0.00 0.08 0.00

NO. 0 0 0 0 1 4 0 0 1 0 6 0

Maximum Daily Rainfall 1.30

Maximum Monthly Rainfall 1.81

Total Annual Rainfall 2.20

Number of Days with Rain 12 Notes:

Annual rainfall in millimeters: 56 Total down-time: 0 days

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila @ Olberg (gage # 780) for Water Year 1999

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP ------------------------------------------------------------------------------

1 .31

2 .08 .51

3 4 .12 .24

5 .08 .04

6 .04 .16 .04

7 .04 8

9

10

11 .12 12 .47

13 .04

14 .12 .04

15 .12 .08 .12 16

17 .04

18

19 .24 20 ----

21 ----

22 ---- .08

23 .51 .04 24 .04

25 .08

26

27 28 .08 .04 .12

29 ----

30 ----

31 ---- ---- ---- ---- .16 ---- ------------------------------------------------------------------------------

SUM 0.00 0.08 0.28 0.00 0.67 0.04 1.14 0.00 0.00 0.94 0.39 0.63

ACC 0.00 0.08 0.35 0.35 1.02 1.06 2.20 2.20 2.20 3.15 3.54 4.17

MAX 0.00 0.08 0.12 0.00 0.47 0.04 0.51 0.00 0.00 0.51 0.16 0.24

NO. 0 1 4 0 3 1 5 0 0 6 4 6

Maximum Daily Rainfall 0.51

Maximum Monthly Rainfall 1.14

Total Annual Rainfall 4.17

Number of Days with Rain 30 Notes:

Annual rainfall in millimeters: 106 Total down-time: 4.96 days Gage down from 11/20 10:20 (0) through 11/23 09:19 (0) due to transmitter failure; no rain fell. Gage down from 9/19 09:15 (97) through 9/21 09:15 (103) due to repeater failure; assigned 6mm to 9/19.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila River @ Olberg (gage # 780) for Water Year 1998

DAY Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep -------------------------------------------------------------------------------

1 .24 .16 .12

2 .55

3 .04 4 .31 .08

5 .04

6 .04 .04

7 .12 .16 .04 8 .12 .51

9 ---- .83 .04

10 ---- .04

11 .16 12 .08

13 .20

14 .04 .12

15 .51 .67 16

17 .24

18 .04

19 20

21 .20 .08 .20

22 .08 .24

23 24 .31

25 .04

26 .47

27 28 .24 .35

29 ---- .28

30 ----

31 ---- ---- ---- ---- ---- -------------------------------------------------------------------------------

SUM 0.28 0.28 1.42 0.04 2.95 1.10 0.16 0.00 0.00 0.20 1.38 0.20

ACC 0.28 0.55 1.97 2.01 4.96 6.06 6.22 6.22 6.22 6.42 7.80 7.99

MAX 0.20 0.16 0.55 0.04 0.83 0.47 0.16 0.00 0.00 0.16 0.67 0.08

NO. 2 3 8 1 8 4 1 0 0 2 5 4

Maximum Daily Rainfall 0.83

Maximum Monthly Rainfall 2.95

Total Annual Rainfall 7.99

Number of Days with Rain 38

Notes:

Annual rainfall in millimeters: 198 Total down-time: 2.6 days Gage down from 12/08 10:12 (42) through 12/11 12:08 for unknown reason; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila R. @ Olberg (gage # 780) for Water Year 1997

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

------------------------------------------------------------------------------ 1

2 .16

3 .24 .24 .08

4 .12 5 .04

6 .08 .12

7

8 .04 9 .12 .28

10 .04

11

12 13 .20

14 .12

15

16 17

18

19

20 21

22 .28

23 .04 .16

24 .24 25

26 .04

27 .04

28 .20 29 .04

30 .12 .04

31 .35

------------------------------------------------------------------------------ SUM 0.00 0.35 0.00 0.43 0.24 0.00 0.24 0.00 0.00 0.12 1.57 0.43

ACC 0.00 0.35 0.35 0.79 1.02 1.02 1.26 1.26 1.26 1.38 2.95 3.39

MAX 0.00 0.28 0.00 0.20 0.20 0.00 0.24 0.00 0.00 0.12 0.35 0.16

NO. 0 3 0 4 2 0 1 0 0 1 9 5

Maximum Daily Rainfall 0.35

Maximum Monthly Rainfall 1.57

Total Annual Rainfall 3.39

Number of Days with Rain 25

Notes:

Annual rainfall in millimeters: 86 Total down-time: 0 days

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila R. @ Olberg (gage # 780) for Water Year 1996

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

------------------------------------------------------------------------------ 1 .39

2 .12 .12

3

4 5 .04 .16

6 .16

7 .08

8 .28 9 .04

10

11

12 13 .04 .24

14 .04 .12

15 .04

16 17

18

19

20 21

22

23

24 .04 25 .20 .91

26 .04

27

28 29 .24

30

31

------------------------------------------------------------------------------ SUM 0.00 0.31 0.00 0.00 0.63 0.28 0.00 0.00 0.00 1.18 0.55 0.31

ACC 0.00 0.31 0.31 0.31 0.94 1.22 1.22 1.22 1.22 2.44 2.99 3.43

MAX 0.00 0.16 0.00 0.00 0.39 0.24 0.00 0.00 0.00 0.91 0.28 0.16

NO. 0 3 0 0 3 2 0 0 0 5 3 3

Maximum Daily Rainfall 0.91

Maximum Monthly Rainfall 1.22

Total Annual Rainfall 3.43

Number of Days with Rain 19

Notes: Annual Rainfall in mm: 87 Gage down from 12/13 23:39 (8) through 12/19 11:38 (8) due to repeater failure; no rain fell. Gage down from 6/7 23:42 (31) through 6/11 11:43 (31) due to repeater failure; no rain fell.

Flood Control District of Maricopa County, 2801 W. Durango St., Phoenix, AZ 85009 (602) 506-1501

Flood Control District of Maricopa County ALERT System Daily Rainfall at Gila R. @ Olberg (gage # 780) for Water Year 1995

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

------------------------------------------------------------------------------ 1

2

3

4 5

6

7 0.04

8 9

10

11 0.24

12 0.12 13

14 0.39

15

16 0.59 17 0.04

18 0.08

19 0.24

20 0.31 21 0.04

22

23

24 25

26

27

28 0.43 29 0.04

30

31

------------------------------------------------------------------------------ SUM ---- ---- ---- ---- ---- ---- 0.12 0.00 0.00 0.12 1.81 0.51

ACC ---- ---- ---- ---- ---- ---- 0.16 0.16 0.16 0.28 2.09 2.60

MAX ---- ---- ---- ---- ---- ---- 0.08 0.00 0.00 0.12 0.59 0.43

NO. ---- ---- ---- ---- ---- ---- 2 0 0 1 6 3

Maximum Daily Rainfall 0.59

Maximum Monthly Rainfall 1.81

Partial Annual Rainfall 2.60

Number of Days with Rain 12

Notes: Gage installed 4/12/95. Gage down from 7/26 11:36 (7) through 7/28 11:35 (7) due to Signal Peak repeater failure; no rain fell. Partial Annual rainfall in mm: 66