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USGS
Water Resources of Colorado


GUNNISON RIVER BASIN

09112500 EAST RIVER AT ALMONT, CO

LOCATION.--Lat 38°39'52", long. 106°50'51", in NW14SE14 sec.22, T.51 N., R.1 E., Gunnison County, Hydrologic Unit 14020001, on left bank at Almont, 200 ft upstream from bridge on State Highway 135, and 400 ft upstream from confluence with Taylor River.

DRAINAGE AREA.--289 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April to October 1905, July 1910 to September 1922, October 1934 to current year. Monthly discharges only for some periods, published in WSP 1313. For a complete listing of historical data available for this site, see http://waterdata. usgs.gov/co/nwis/inventory/?site_no=09112500

REVISED RECORDS.--WSP 1313: 1911. WSP 1733: 1952. WSP 1924: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Datum of gage is 8,006.29 ft above NGVD of 1929. Apr. 16 to Sept. 30, 1905, and July 27, 1910 to
Apr. 30, 1922, nonrecording gages at bridge 200 ft downstream, at different datums. Oct. 1, 1934 to Sept. 22, 1954, water-stage recorder at present site
at datum 2.00 ft higher.

REMARKS.--Records good except for estimated daily discharges, which are poor. Diversions for irrigation of about 7,400 acres upstream from station.

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

121

85

e74

e47

e49

e48

68

376

2,310

423

200

105

2

109

88

e69

e55

e49

e46

75

354

2,060

423

194

97

3

102

82

e68

e47

e48

e45

77

346

1,810

e377

200

94

4

101

81

e65

e50

e48

e47

74

358

1,650

e351

199

97

5

98

82

e68

e51

e47

e48

71

332

1,460

e323

188

94

6

102

76

e65

e49

e42

e47

71

271

1,270

e298

180

100

7

100

78

e63

e49

e40

e46

68

248

1,120

e270

176

111

8

96

90

e61

e51

e37

e48

62

234

1,010

e259

172

121

9

96

93

e55

e49

e42

e51

69

227

1,050

257

163

140

10

96

83

e53

e51

e48

49

80

202

1,050

241

161

245

11

95

88

e56

e56

e47

53

104

190

1,020

225

164

204

12

91

81

e63

e56

e49

58

142

188

1,020

202

170

135

13

86

84

e66

e54

e47

58

183

230

983

189

169

153

14

85

90

e60

e49

e54

62

253

280

924

190

171

146

15

83

84

e61

e55

e58

68

296

487

925

190

155

138

16

80

69

e62

e54

e51

70

243

572

937

e188

152

130

17

80

80

e61

e45

e50

67

241

905

828

e190

163

123

18

79

83

e56

e53

e51

63

233

1,070

810

193

153

120

19

76

78

e51

e44

e49

61

198

1,050

779

191

140

114

20

77

81

e46

e49

e47

56

205

1,010

731

187

128

112

21

75

79

e53

e49

e46

64

230

1,080

662

256

122

108

22

77

75

e55

e51

e50

59

253

1,220

650

326

121

97

23

80

75

e44

e51

e49

63

262

1,460

635

290

130

92

24

83

84

e38

e50

e46

67

221

1,620

601

293

127

80

25

80

79

e57

e51

e49

63

233

1,770

517

257

125

77

26

78

64

e53

e49

e48

63

301

1,630

483

252

136

75

27

85

e59

e47

e49

e48

63

379

1,870

459

261

123

74

28

86

e66

e49

e49

e48

56

445

2,120

456

240

122

73

29

88

e72

e49

e49

---

56

440

2,220

445

246

119

72

30

82

e71

e52

e49

---

59

419

2,370

441

218

113

67

31

82

---

e48

e49

---

69

---

2,250

---

183

112

---

TOTAL

2,749

2,380

1,768

1,560

1,337

1,773

5,996

28,540

29,096

7,989

4,748

3,394

MEAN

88.7

79.3

57.0

50.3

47.8

57.2

200

921

970

258

153

113

MAX

121

93

74

56

58

70

445

2,370

2,310

423

200

245

MIN

75

59

38

44

37

45

62

188

441

183

112

67

AC-FT

5,450

4,720

3,510

3,090

2,650

3,520

11,890

56,610

57,710

15,850

9,420

6,730

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1911 - 2003, BY WATER YEAR (WY)
MEAN

117

95.2

73.1

62.2

59.5

68.2

248

1,018

1,353

555

233

130

MAX

279

172

128

102

90.4

137

670

1,978

2,670

2,037

659

271

(WY)

(1912)

(1987)

(1985)

(1985)

(1962)

(1986)

(1936)

(1936)

(1920)

(1957)

(1995)

(1965)

MIN

56.3

47.8

42.0

25.5

28.7

43.1

77.2

222

282

93.5

25.0

52.4

(WY)

(1978)

(1978)

(1977)

(1940)

(1940)

(1976)

(1964)

(1977)

(2002)

(1977)

(1913)

(1977)

SUMMARY STATISTICS
FOR 2002 CALENDAR YEAR
FOR 2003 WATER YEAR
WATER YEARS 1911 - 2003
ANNUAL TOTAL
50,808
91,330
ANNUAL MEAN
139
250
335
HIGHEST ANNUAL MEAN
574 1995
LOWEST ANNUAL MEAN
104 1977
HIGHEST DAILY MEAN
681 Jun 1
2,370 May 30
5,000 Jun 12, 1918
LOWEST DAILY MEAN
32 Sep 6
e37 Feb 8
19 Aug 13, 1913
ANNUAL SEVEN-DAY MINIMUM
35 Sep 1
43 Feb 5
21 Jan 15, 1940
MAXIMUM PEAK FLOW
2,560 May 30
a6,500 Jun 15, 1921
MAXIMUM PEAK STAGE
6.42 May 30
b6.60 Jun 15, 1921
ANNUAL RUNOFF (AC-FT)
100,800
181,200
242,700
10 PERCENT EXCEEDS
350
655
1,040
50 PERCENT EXCEEDS
86
88
108
90 PERCENT EXCEEDS
53
49
55

e Estimated.
a Site and datum then in use, from rating curve extended above 3,000 ft3/s.
b Maximum gage height 8.41 ft, Jun 18, 1995, present datum.


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Water Resources of Colorado
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