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USGS
Water Resources of Colorado


GUNNISON RIVER BASIN

09118450 COCHETOPA CREEK BELOW ROCK CREEK, NEAR PARLIN, CO

LOCATION.--Lat 38°20'08", long 106°46'18", in SW14NE14 sec.17, T.47 N., R.2 E. Saguache County, Hydrologic Unit 14020003, on left bank 0.75 mi downstream from Rock Creek and 12 mi south of Parlin.

DRAINAGE AREA.--334 mi2.

PERIOD OF RECORD.--October 1981 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09118450

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 8,470 ft above NGVD of 1929, from topographic map.

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions for irrigation of hay meadows upstream from station. Transmountain diversion by Tarbell ditch exports water upstream from station to Saguache Creek, since 1913. 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

e16

e16

e15

e9.1

e6.3

e11

29

28

39

8.0

11

20

2

14

e17

e14

e9.1

e6.7

e13

33

27

36

6.8

9.6

18

3

14

e18

e13

e11

e6.7

e13

28

25

32

6.0

12

18

4

14

e19

e12

e9.5

e6.7

e14

25

27

26

6.9

14

21

5

14

e19

e12

e9.5

e7.9

e14

21

26

23

6.0

8.8

22

6

14

e18

e11

e9.5

e8.3

e14

20

24

20

6.0

9.2

28

7

14

e18

e11

e8.7

e8.3

e15

19

23

15

11

9.1

32

8

15

e18

e12

e7.5

e9.5

e16

19

24

13

13

7.9

27

9

15

e18

e11

e8.3

e11

e16

22

24

13

11

6.7

26

10

16

e17

e12

e8.3

e9.9

e17

30

22

17

14

6.7

59

11

14

e18

e10

e7.5

e9.9

e19

37

22

16

e11

7.6

49

12

16

e18

e12

e6.0

e11

e20

40

18

16

e9.5

8.0

36

13

17

e17

e14

e7.5

e11

e19

41

20

18

e8.0

15

29

14

18

e18

e12

e7.1

e11

e18

44

22

16

e7.5

15

26

15

18

e18

e9.1

e6.7

e10

e21

49

29

15

e6.8

13

24

16

18

e21

e13

e6.3

e10

e23

36

35

14

e8.5

14

23

17

18

e21

e9.8

e7.1

e8.4

e21

34

29

14

e11

15

26

18

19

e22

e9.4

e6.7

e11

e25

32

31

10

10

15

24

19

e22

e20

e9.1

e6.7

e11

e27

29

36

16

8.7

16

22

20

e21

e19

e10

e6.7

e9.6

e27

27

29

29

8.9

15

24

21

e21

e18

e9.8

e6.3

e9.6

e25

28

27

21

13

13

23

22

e21

e19

e8.3

e7.1

e10

e23

30

24

17

10

13

22

23

e23

e19

e9.9

e7.1

e10

e23

28

29

14

13

15

22

24

e22

e20

e8.3

e7.5

e9.6

e22

23

23

11

12

17

20

25

e22

e20

e8.7

e6.7

e8.8

e26

24

23

13

8.5

34

20

26

e20

e20

e8.7

e8.3

e11

e32

24

24

13

8.9

25

18

27

e20

e18

e11

e9.9

e10

e32

25

20

13

8.5

20

17

28

e18

e18

e9.5

e9.1

e9.2

e31

28

21

13

7.7

23

17

29

e14

e16

e8.7

e9.0

---

e28

30

25

14

7.7

41

16

30

e15

e16

e9.5

e7.1

---

e26

29

29

12

8.6

33

16

31

e15

---

e9.1

e7.1

---

e25

---

30

---

9.1

26

---

TOTAL

538

554

332.9

244.0

262.4

656

884

796

539

285.6

488.6

745

MEAN

17.4

18.5

10.7

7.87

9.37

21.2

29.5

25.7

18.0

9.21

15.8

24.8

MAX

23

22

15

11

11

32

49

36

39

14

41

59

MIN

14

16

8.3

6.0

6.3

11

19

18

10

6.0

6.7

16

AC-FT

1,070

1,100

660

484

520

1,300

1,750

1,580

1,070

566

969

1,480

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1982 - 2003, BY WATER YEAR (WY)
MEAN

35.5

29.9

22.3

19.2

19.6

31.4

52.4

82.7

82.4

49.1

62.2

45.2

MAX

72.6

49.9

39.5

36.6

33.4

52.3

135

413

240

130

153

90.8

(WY)

(1983)

(1983)

(1985)

(1984)

(1986)

(1985)

(1987)

(1984)

(1984)

(1995)

(1999)

(1982)

MIN

17.4

15.0

10.3

7.87

9.37

12.5

27.9

13.2

8.66

7.63

10.9

14.7

(WY)

(2003)

(1993)

(1982)

(2003)

(2003)

(1982)

(1990)

(2002)

(2002)

(2002)

(2002)

(1996)

SUMMARY STATISTICS
FOR 2002 CALENDAR YEAR
FOR 2003 WATER YEAR
WATER YEARS 1982 - 2003
ANNUAL TOTAL
6,053.7
6,325.5
ANNUAL MEAN
16.6
17.3
44.4
HIGHEST ANNUAL MEAN
106 1984
LOWEST ANNUAL MEAN
17.3 2002
HIGHEST DAILY MEAN
73 Apr 4
59 Sep 10
954 May 23, 1984
LOWEST DAILY MEAN
4.0 Jul 31
e6.0 Jan 12
4.0 Jul 31, 2002
ANNUAL SEVEN-DAY MINIMUM
5.4 Jul 27
6.6 Jan 15
5.4 Jul 27, 2002
MAXIMUM PEAK FLOW
62 Sep 10
1,120 May 23, 1984
MAXIMUM PEAK STAGE
2.25 Sep 10
a4.49 May 23, 1984
ANNUAL RUNOFF (AC-FT)
12,010
12,550
32,170
10 PERCENT EXCEEDS
28
29
89
50 PERCENT EXCEEDS
13
16
31
90 PERCENT EXCEEDS
7.6
8.0
14

e Estimated.
a Maximum gage height, 5.64 ft, Mar 25, 1998, backwater from ice.


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Water Resources of Colorado
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