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USGS
Water Resources of Colorado


SAN JUAN RIVER BASIN

09339900 EAST FORK SAN JUAN RIVER ABOVE SAND CREEK, NEAR PAGOSA SPRINGS, CO

LOCATION.--Lat 37°23'23", long 106°50'26", in NE14 sec.4, T.36 N., R.1 E., Archuleta County, Hydrologic Unit 14080101, on right bank 0.3 mi upstream from Sand Creek, 4.0 mi upstream from West Fork San Juan River, and 13 mi northeast of Pagosa Springs.

DRAINAGE AREA.--64.1 mi2.

PERIOD OF RECORD.--October 1956 to September 1996, October 1998 to September 2003 (discontinued). Prior to October 1959, published as San Juan River above Sand Creek, near Pagosa Springs. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09339900

REVISED RECORDS.--WSP 1713: 1957.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 7,940 ft above NGVD of 1929, from topographic map.

REMARKS.--Records fair except for estimated daily discharges, which are poor. Diversions upstream from station for irrigation of about 500 acres of hay meadows 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.

EXTREMES OUTSIDE PERIOD OF RECORD.--Greatest flood since at least 1885 occurred Oct. 5, 1911.

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

16

12

14

e11

e12

e12

31

121

321

47

29

22

2

23

12

14

e11

e12

e11

37

119

302

45

33

22

3

36

11

13

e11

e12

e11

31

121

290

43

30

24

4

28

12

e12

e11

e11

e11

27

119

271

40

24

23

5

27

11

e12

e11

e11

e11

26

98

250

37

21

24

6

23

10

e12

e11

e11

e11

26

88

212

34

19

45

7

22

11

e12

e11

e11

e12

24

83

191

32

19

38

8

21

12

e11

e11

e11

e12

26

75

179

30

19

31

9

20

15

e11

e11

e11

e12

28

68

178

28

18

102

10

19

16

e11

e11

e11

e14

44

64

176

26

21

210

11

18

14

e11

e11

e11

e15

63

63

169

25

22

104

12

17

13

e11

e11

e12

e17

70

78

156

24

22

74

13

16

13

e11

e11

e14

e21

75

98

140

23

20

62

14

16

14

e11

e11

e15

e22

98

109

121

21

18

54

15

16

14

e11

e11

e13

e22

111

146

113

21

17

47

16

15

13

e11

e11

e12

e23

88

155

108

21

18

41

17

15

14

e11

e11

e12

22

86

216

98

22

17

37

18

15

14

e11

e11

e12

25

76

252

97

20

17

33

19

14

14

e10

e11

e12

25

67

247

99

20

16

31

20

14

14

e11

e11

e12

23

64

252

100

23

15

28

21

14

15

e11

e11

e11

21

81

269

90

20

15

26

22

14

15

e11

e11

e11

20

76

295

85

19

15

25

23

16

16

e11

e11

e11

22

68

306

80

19

23

23

24

16

15

e11

e11

e11

26

59

310

74

19

30

22

25

14

15

e11

e11

e11

27

67

309

68

17

24

21

26

14

14

e11

e11

e12

29

89

297

63

18

22

20

27

15

e13

e11

e11

e12

28

111

331

59

20

19

19

28

14

e13

e11

e11

e12

26

132

362

57

29

22

18

29

14

e13

e11

e11

---

26

139

366

53

36

30

18

30

13

e14

e11

e11

---

25

135

359

51

31

33

18

31

13

---

e11

e11

---

e28

---

350

---

28

30

---

TOTAL

548

402

352

341

329

610

2,055

6,126

4,251

838

678

1,262

MEAN

17.7

13.4

11.4

11.0

11.8

19.7

68.5

198

142

27.0

21.9

42.1

MAX

36

16

14

11

15

29

139

366

321

47

33

210

MIN

13

10

10

11

11

11

24

63

51

17

15

18

AC-FT

1,090

797

698

676

653

1,210

4,080

12,150

8,430

1,660

1,340

2,500

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1957 - 2003, BY WATER YEAR (WY)
MEAN

33.9

22.0

14.1

11.8

12.8

27.1

103

291

320

111

54.2

42.6

MAX

107

74.9

30.3

21.7

24.6

62.9

248

520

788

395

177

207

(WY)

(1987)

(1987)

(1987)

(1973)

(1995)

(1986)

(1985)

(1984)

(1957)

(1957)

(1999)

(1970)

MIN

8.39

8.31

4.68

5.00

5.66

8.86

29.2

50.8

29.1

10.5

7.80

10.6

(WY)

(1957)

(1961)

(1959)

(1959)

(1990)

(1977)

(1977)

(2002)

(2002)

(2002)

(2002)

(1978)

SUMMARY STATISTICS
FOR 2002 CALENDAR YEAR
FOR 2003 WATER YEAR
WATER YEARS 1957 - 2003
ANNUAL TOTAL
6,838.0
17,792
ANNUAL MEAN
18.7
48.7
87.2
HIGHEST ANNUAL MEAN
155 1985
LOWEST ANNUAL MEAN
18.3 2002
HIGHEST DAILY MEAN
69 May 21
366 May 29
1,180 May 27, 1993
LOWEST DAILY MEAN
6.1 Sep 6
10 Nov 6
3.4 Dec 26, 1958
ANNUAL SEVEN-DAY MINIMUM
6.6 Aug 26
11 Dec 13
3.7 Dec 13, 1958
MAXIMUM PEAK FLOW
413 May 30
a2,260 Sep 14, 1970
MAXIMUM PEAK STAGE
4.43 May 30
6.75 Sep 14, 1970
ANNUAL RUNOFF (AC-FT)
13,560
35,290
63,180
10 PERCENT EXCEEDS
42
121
264
50 PERCENT EXCEEDS
12
20
28
90 PERCENT EXCEEDS
8.7
11
10

e Estimated.
a From rating curve extended above 460 ft3/s, on basis of slope-area measurement at gage height, 6.13 ft.


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Water Resources of Colorado
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