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USGS
Water Resources of Colorado


SAN JUAN RIVER BASIN

09358550 CEMENT CREEK AT SILVERTON, CO

LOCATION.--Lat 37°49'11", long 107°39'47", in SW14SW14 sec.8, T.41 N., R.7 W., San Juan County, Hydrologic Unit 14080104, on left bank, at abandoned railroad crossing Cement Creek, 0.1 mile north of Silverton, and 0.8 mile upstream from mouth.

DRAINAGE AREA.--20.1 mi2.

PERIOD OF RECORD.--October 1991 to September 1993, October 1994 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09358550

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 9,380 ft above NGVD of 1929, from topographic map.

REMARKS.--Records fair except for estimated daily discharges, which are poor. Natural regulation by many lakes upstream from station. Diversions for mining operations upstream from station. However, these diversions are returned to the creek upstream of the gage. Mine drainage contributes considerable amounts of water to the creek. 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.--A major flood occurred October 5, 1911. A more recent flood occurred June 6, 1978, when Lake Emma (6.5 mi northeast of Silverton) was undermined by mining operations, and released a large quantity of water into the headwaters of Cement Creek. Discharge not determined.

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

19

16

e13

e8.0

e8.7

e8.4

18

53

196

36

16

14

2

20

16

e13

e8.2

e8.7

e8.5

17

49

194

35

16

14

3

21

15

e13

e8.3

e8.7

e8.6

15

48

168

35

16

14

4

22

15

e13

e8.4

e8.7

e8.7

14

48

146

33

16

14

5

22

15

e13

e8.5

e8.8

e8.9

14

40

129

30

15

15

6

21

15

e13

e8.5

e8.9

e9.0

14

35

116

28

16

16

7

21

15

13

e8.5

e8.9

e9.2

14

33

109

26

16

18

8

21

16

13

e8.5

e8.9

e9.4

13

31

109

24

16

15

9

20

16

e11

e8.5

e9.0

e9.7

16

28

108

23

15

25

10

19

15

e11

e8.5

e9.1

e10

22

26

104

22

16

36

11

19

15

e10

e8.6

e9.3

e12

27

29

99

21

e15

33

12

18

14

e9.7

e8.8

e8.7

13

28

42

86

20

e14

38

13

18

15

e8.5

e9.0

e8.4

14

32

55

73

20

19

35

14

17

15

e8.2

e9.3

e8.2

14

38

70

71

19

20

31

15

17

15

e8.0

e9.3

e8.1

14

35

77

75

18

16

29

16

17

13

e8.0

e9.5

e7.9

13

28

85

69

19

20

27

17

17

15

e8.0

e9.7

e7.7

13

29

122

60

19

18

25

18

16

14

e8.0

e9.8

e7.5

13

29

119

56

18

17

23

19

15

14

e8.0

e10

e7.6

12

24

107

56

19

16

e22

20

16

14

e7.9

e11

e7.7

12

25

118

55

17

15

e21

21

16

15

e7.8

e13

e7.7

12

28

137

53

17

15

20

22

16

16

e7.8

e12

e7.8

13

26

170

55

17

15

19

23

16

16

e7.7

e11

e8.0

14

23

194

55

17

18

18

24

15

15

e7.6

e10

e8.1

15

23

202

50

17

16

17

25

15

15

e7.6

e9.8

e8.2

15

32

166

46

17

15

17

26

16

14

e7.6

e9.3

e8.3

15

47

167

45

16

15

16

27

16

14

e7.6

e9.2

e8.3

15

60

205

44

17

15

16

28

15

e14

e7.6

e8.9

e8.3

13

65

239

42

17

16

15

29

16

e14

e7.6

e8.7

---

e15

59

237

40

17

15

15

30

14

e13

e7.7

e8.7

---

e17

55

218

39

16

18

15

31

16

---

e7.9

e8.7

---

e17

---

203

---

16

15

---

TOTAL

547

444

294.8

288.2

234.2

381.4

870

3,353

2,548

666

501

633

MEAN

17.6

14.8

9.51

9.30

8.36

12.3

29.0

108

84.9

21.5

16.2

21.1

MAX

22

16

13

13

9.3

17

65

239

196

36

20

38

MIN

14

13

7.6

8.0

7.5

8.4

13

26

39

16

14

14

MED

17

15

8.0

8.9

8.3

13

26

85

70

19

16

18

AC-FT

1,080

881

585

572

465

757

1,730

6,650

5,050

1,320

994

1,260

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1992 - 2003, BY WATER YEAR (WY)
MEAN

18.7

16.1

13.0

12.1

12.1

15.3

29.3

101

125

54.0

26.2

21.7

MAX

28.9

19.8

15.6

15.8

17.8

22.7

42.1

145

263

149

50.7

34.6

(WY)

(1998)

(1999)

(1995)

(1995)

(1995)

(1995)

(2000)

(1996)

(1995)

(1995)

(1999)

(1999)

MIN

14.0

12.7

9.26

8.27

8.36

12.3

22.6

37.3

24.6

13.2

12.9

16.9

(WY)

(1992)

(2002)

(2002)

(2002)

(2003)

(2003)

(1998)

(2002)

(2002)

(2002)

(2002)

(2002)

SUMMARY STATISTICS
FOR 2002 CALENDAR YEAR
FOR 2003 WATER YEAR
WATER YEARS 1992 - 2003
ANNUAL TOTAL
6,364.3
10,760.6
ANNUAL MEAN
17.4
29.5
37.1
HIGHEST ANNUAL MEAN
56.3 1995
LOWEST ANNUAL MEAN
17.0 2002
HIGHEST DAILY MEAN
50 May 20
239 May 28
385 Jun 16, 1995
LOWEST DAILY MEAN
e7.6 Dec 24
e7.5 Feb 18
a,e7.5 Jan 2, 1992
ANNUAL SEVEN-DAY MINIMUM
7.6 Dec 23
7.6 Dec 23
e7.6 Dec 23, 2002
MAXIMUM PEAK FLOW
300 May 28
471 Jun 14, 1995
MAXIMUM PEAK STAGE
2.26 May 28
2.85 Jun 14, 1995
ANNUAL RUNOFF (AC-FT)
12,620
21,340
26,850
10 PERCENT EXCEEDS
33
60
95
50 PERCENT EXCEEDS
14
16
18
90 PERCENT EXCEEDS
8.2
8.4
11

e Estimated.
a Also occurred Feb 18, 2003.


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U.S. Geological Survey
Water Resources of Colorado
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