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USGS
Water Resources of Colorado


GUNNISON RIVER BASIN

09147000 DALLAS CREEK NEAR RIDGWAY, CO

LOCATION.--Lat 38°10'40", long 107°45'28", on line between sec.4 and 5, T.45 N., R.8 W., Ouray County, Hydrologic Unit 14020006, on right bank 20 ft downstream from county road bridge, 1.5 mi upstream from mouth, and 1.5 mi northwest of Ridgway.

DRAINAGE AREA.--97.2 mi2.

PERIOD OF RECORD.--March 1922 to October 1927, October 1955 to September 1971, October 1979 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09147000

REVISED RECORDS.--WSP 1924: 1960. WDR CO-88-2: Drainage area.

GAGE.--Water stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,980 ft above NGVD of 1929, from topographic map. Mar. 1, 1922 to Oct. 31, 1927, nonrecording gage at different datum.

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions upstream from station for irrigation of about 4,500 acres upstream from and 700 acres downstream from station. One small ditch imports water from Leopard Creek (Dolores River basin) to drainage upstream from station. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality Data For Gaging Stations" section of this report.

Discharge, cubic feet per second 
WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES
DAY
OCT
NOV
DEC
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
1

26

22

20

e16

15

13

30

4.3

87

5.0

47

45

2

29

22

22

e15

14

e15

36

3.8

86

5.3

37

38

3

43

18

19

e16

12

17

32

2.7

81

12

34

34

4

32

20

20

e16

e14

13

25

2.8

81

15

31

30

5

33

17

17

e16

e16

13

22

2.7

71

15

29

29

6

30

18

20

15

e15

14

23

2.5

46

16

26

33

7

30

19

22

e15

e15

14

23

2.0

34

16

24

43

8

29

20

22

e16

e15

16

20

1.9

30

12

25

44

9

29

37

e21

e15

e15

e22

25

2.1

29

11

21

123

10

27

28

e21

14

e14

e26

33

2.1

26

8.4

19

192

11

25

24

e21

14

e15

e27

60

2.0

24

11

17

90

12

25

19

22

14

e15

e30

96

2.4

23

16

18

66

13

25

21

20

e15

e15

33

114

2.1

19

18

19

63

14

25

21

e20

e16

e17

26

93

2.0

15

22

75

63

15

25

21

16

16

e15

28

71

2.1

18

21

54

57

16

25

21

19

e16

14

26

50

2.0

18

21

57

53

17

26

24

14

e15

14

22

62

2.0

16

22

74

52

18

27

21

14

e15

14

20

55

1.9

14

20

66

52

19

26

20

16

e16

13

18

51

2.8

15

21

37

49

20

25

23

e18

e16

15

16

46

1.8

15

19

30

44

21

22

21

e17

e16

13

20

45

4.3

12

18

26

41

22

22

20

e19

e15

13

17

54

7.0

13

21

24

41

23

22

20

e18

16

e16

21

41

8.5

16

26

23

39

24

22

19

e17

14

14

25

27

11

13

26

22

35

25

22

20

e17

13

13

29

33

35

9.1

24

25

28

26

23

18

e17

15

13

25

33

32

8.0

23

22

26

27

25

20

e16

15

e15

24

30

32

8.6

22

25

22

28

23

e22

e17

14

12

19

20

64

6.4

24

35

20

29

25

23

e16

14

---

15

13

94

6.0

42

44

17

30

24

24

e16

15

---

16

7.9

94

7.5

37

43

15

31

23

---

e16

14

---

21

---

85

---

48

42

---

TOTAL

815

643

570

468

401

641

1,270.9

514.8

847.6

617.7

1,071

1,484

MEAN

26.3

21.4

18.4

15.1

14.3

20.7

42.4

16.6

28.3

19.9

34.5

49.5

MAX

43

37

22

16

17

33

114

94

87

48

75

192

MIN

22

17

14

13

12

13

7.9

1.8

6.0

5.0

17

15

AC-FT

1,620

1,280

1,130

928

795

1,270

2,520

1,020

1,680

1,230

2,120

2,940

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1922 - 2003, BY WATER YEAR (WY)
MEAN

25.6

24.4

20.1

17.8

18.7

25.6

57.5

49.0

59.4

72.6

57.7

39.6

MAX

65.1

39.1

33.9

32.0

32.0

59.4

183

249

171

230

141

117

(WY)

(1985)

(1926)

(1924)

(1924)

(1924)

(1985)

(1985)

(1984)

(1984)

(1983)

(1983)

(1927)

MIN

2.07

14.4

13.4

9.61

11.9

14.8

4.13

0.67

1.49

0.75

3.95

2.58

(WY)

(1957)

(1957)

(1994)

(1980)

(1994)

(1980)

(1990)

(1981)

(2002)

(2002)

(2002)

(1956)

SUMMARY STATISTICS
FOR 2002 CALENDAR YEAR
FOR 2003 WATER YEAR
WATER YEARS 1922 - 2003
ANNUAL TOTAL
5,606.42
9,344.0
ANNUAL MEAN
15.4
25.6
38.8
HIGHEST ANNUAL MEAN
86.4 1984
LOWEST ANNUAL MEAN
13.8 1990
HIGHEST DAILY MEAN
103 Sep 11
192 Sep 10
740 May 3, 1924
LOWEST DAILY MEAN
0.48 May 17
1.8 May 20
0.21 Jun 19, 1981
ANNUAL SEVEN-DAY MINIMUM
0.58 Jun 25
2.1 May 12
0.38 May 11, 1981
MAXIMUM PEAK FLOW
1,170 Sep 9
a3,960 Jul 31, 1999
MAXIMUM PEAK STAGE
b5.79 Sep 9
c8.42 Jul 31, 1999
ANNUAL RUNOFF (AC-FT)
11,120
18,530
28,130
10 PERCENT EXCEEDS
29
47
88
50 PERCENT EXCEEDS
16
21
24
90 PERCENT EXCEEDS
0.68
12
11

e Estimated.
a On basis of slope-area measurement of peak flow.
b From crest-stage gage.
c From high water mark.


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Water Resources of Colorado
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