USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

USGS 11274790 TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY

Tuolumne County, California

Hydrologic Unit Code 18040009

Latitude 37°55'00", Longitude 119°39'32" NAD27

Drainage area 301 square miles

Gage datum 3,813.65 feet above NAVD88

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Meas. Number	Date Time	Time Datum	Measurement Used?	Who	Measuring Agency	Stream flow (ft³/s)	Gage Height (ft)	GH Change (ft)	Meas. Duration (hr)	Meas. Rated	Control	Flow Adjust. Code
62	2025-08-27 10:34:17	PDT	Yes	KBARRIOS	USGS	238	8.93	-0.01	0.24	Fair	Clear	NONE
61	2025-07-08 12:02:58	PDT	Yes	KBARRIOS	USGS	230	8.78	0.01	0.50	Poor	Clear	NONE
60	2025-05-21 15:15:16	PDT	Yes	KBARRIOS/YGA	USGS	2390	12.94	0.03	0.41	Poor	Clear	NONE
59	2024-10-15 14:03:37	PDT	Yes	KBARRIOS/AMI	USGS	7.21	6.67	0.00	2.18	Poor	Clear	NONE
58	2024-09-04 13:01:18	PDT	Yes	KBARRIOS	USGS	18.3	7.01	0.00	1.13	Poor	Clear	NONE
57	2024-07-24 13:28:58	PDT	Yes	KBARRIOS	USGS	240	8.72	0.01	0.23	Poor	Clear	NONE
56	2024-06-05 14:33	PDT	No
55	2024-06-05 13:51:32	PDT	Yes	KBARRIOS/YGA	USGS	2820	13.76	0.03	0.40	Poor	Clear	NONE
54	2023-10-11 12:26:56	PDT	Yes	KBARRIOS/JCH	USGS	50.2	7.57	0.00	2.00	Poor	Clear	NONE
53	2023-08-31 11:29:07	PDT	Yes	YGAO/JCHASE	USGS	195	8.71	0.01	0.25	Poor	Clear	NONE
52	2023-08-31 11:03:27	PDT	Yes	YGAO/JCHASE	USGS	193	8.71	0.01	0.23	Poor	Clear	NONE
51	2023-06-29 15:19	PDT	Yes	KBARRIOS	USGS	3390	15.15	-0.08	0.66	Poor	Clear	NONE
50	2022-10-04 13:12:27	PDT	Yes	trhiett/kbar	USGS	16.8	7.00	0.01	0.90	Poor	Clear	NONE
49F	2022-10-03 13:00	PDT	No
49E	2022-10-03 13:00	PDT	No
49D	2022-10-03 13:00	PDT	No
49C	2022-10-03 13:00	PDT	No
49B	2022-10-03 13:00	PDT	No
49A	2022-10-03 13:00	PDT	No
48	2022-08-09 13:42:29	PDT	Yes	trhiett/kbar	USGS	99.2	8.06	0.00	1.50	Poor	Clear	NONE
47	2022-06-13 14:00:08	PDT	Yes	trhiett/jrgr	USGS	834	10.95	-0.02	0.40	Poor	Clear	OTHR
46	2022-06-13 13:21:23	PDT	Yes	trhiett/jrgr	USGS	854	10.96	0.00	0.40	Poor	Clear	OTHR
45	2022-05-19 14:30:43	PDT	No
44	2020-10-19 12:23:52	PDT	Yes	BDC	USGS	4.78	6.54	0.00	0.60	Poor	Clear	NONE
43	2020-09-03 11:39:17	PDT	Yes	TRH	USGS	16.7	6.93	0.00	0.73	Poor	Clear	NONE
42	2020-06-11 11:43	PDT	Yes	JDJ/ JFC	USGS	515	10.08	0.02	0.75	Poor	Clear	OTHR
41	2020-02-27 11:52:04	PST	Yes	JDJ/MDR/TRH	USGS	96.0	8.00	0.00	2.00	Poor	Clear	NONE
40	2019-12-09 12:17:32	PST	Yes	JDJ/TRH	USGS	46.1	7.57	0.05	1.00	Poor	Clear	NONE
39	2019-10-10 12:08	PDT	Yes	JDJ	USGS	15.4	6.98	0.01	1.00	Poor	Clear	NONE
37	2019-05-02 11:41:22	PDT	No
38	2019-04-25 13:42:06	PDT	No
35	2018-12-20 12:49:24	PST	Yes	JDJ/MAO	USGS	55.1	7.77	0.01	1.00	Poor	Clear	NONE
34	2018-10-18 14:46:54	PDT	Yes	JDJ/YSG/DWB	USGS	15.8	6.87	0.00	1.00	Poor	Clear	NONE
33	2018-10-18 13:26:12	PDT	Yes	JDJ/YSG/DWB	USGS	15.7	6.87	0.00	1.00	Poor	Clear	NONE
32	2018-08-16 13:15	PDT	Yes	JDJ / TRH	USGS	57.7	7.65	0.02	1.00	Poor	Clear	NONE
31	2017-10-12 14:25:01	PDT	Yes	JRG	USGS	42.8	7.48	-0.01	0.75	Poor	Clear	NONE
30	2016-10-06 12:08	PDT	Yes	JRG	USGS	17.2	6.73	0.00	0.70	Poor	VegetationLight	NONE
29	2016-10-06 11:29	PDT	Yes	JRG	USGS	15.0	6.74	0.00	0.60	Poor	VegetationLight	NONE
28	2016-08-25 13:05:30	PDT	Yes	JRG	USGS	30.7	7.23	0.00	1.50	Poor	Clear	NONE
27	2015-10-07 12:38:44	PDT	Yes	SJB	USGS	22.7	7.03	0.00	0.60	Poor	VegetationLight	NONE
26	2015-09-02 13:12:36	PDT	Yes	SJB	USGS	16.5	6.86	0.00	0.40	Poor	VegetationLight	NONE
25	2015-06-30 13:13:28	PDT	Yes	SJB/ORB	USGS	232	8.49	0.00	0.90	Poor	Clear	NONE
24	2014-10-08 14:12:19	PDT	Yes	SJB/JKH	USGS	19.3	6.69	0.00	0.50	Poor	VegetationLight	NONE
23	2014-07-15 13:09:43	PDT	Yes	SJB/GC	USGS	88.8	7.84	0.00	0.50	Poor	VegetationLight	NONE
22	2013-10-22 14:57:42	PDT	Yes	SJB	USGS	15.6	6.74	0.00	0.70	Poor	VegetationLight	NONE
21	2013-08-15 14:09:52	PDT	Yes	SJB/MRH	USGS	24.7	7.05	-0.01	1.50	Poor	Clear	NONE
20	2013-07-18 14:24:40	PDT	Yes	SJB	USGS	94.0	7.78	0.00	0.80	Poor	VegetationLight	NONE
19	2012-09-17 13:39:01	PDT	Yes	TRH	USGS	13.1	6.88	0.00	0.50	Poor	Clear	NONE
18	2012-08-22 12:49:46	PDT	Yes	TRH	USGS	64.0	7.60	-0.01	0.50	Poor	Clear	NONE
17	2012-07-25 13:59:51	PDT	Yes	TRH	USGS	82.3	7.67			Poor	Clear	NONE
16	2011-10-26 12:22:48	PDT	Yes	TRH	USGS	87.5	7.85	0.00	0.50	Poor	Clear	NONE
15	2011-10-04 11:58:46	PDT	Yes	TRH	USGS	74.8	7.61	0.00	0.50	Poor	Clear	NONE
14	2011-10-04 11:26:11	PDT	Yes	TRH	USGS	68.3	7.61	0.00	0.50	Poor	Clear	NONE
13	2010-10-13 14:38	PDT	Yes	TRH	USGS	116	7.97	0.00	0.50	Poor	Clear	NONE
12	2010-09-01 13:40	PDT	Yes	TRH	USGS	35.4	7.32	0.00	0.50	Poor	Clear	NONE
11	2009-08-13 11:27	PDT	Yes	TRH	USGS	59.8	7.76	0.00	0.50	Poor	Clear	NONE
10	2008-10-07 12:32	PDT	Yes	TRH	USGS	22.7	7.05	0.00	0.50	Poor	Clear	NONE
9	2008-08-28 13:11	PDT	Yes	TRH	USGS	18.6	7.11	0.00	0.50	Poor	Clear	NONE
8	2008-08-13 10:54	PDT	Yes	TRH	USGS	34.8	7.37	0.00	0.50	Poor	Clear	NONE
5	2007-10-04 11:47	PDT	Yes	TRH	USGS	11.5	6.76	0.00	0.50	Poor	Clear	NONE
4	2007-08-22 13:48	PDT	Yes	TRH	USGS	15.8	6.97	0.00	0.60	Poor	Clear	NONE
3	2007-07-16 13:10	PDT	Yes	TRH	USGS	68.4	7.79	-0.01	0.70	Poor	Clear	NONE
2	2007-06-27 11:30	PDT	Yes	TRH	USGS	136	8.40	0.00	0.70	Poor	Clear	NONE
1	2006-10-18 12:30	PDT	Yes	TRH	USGS	16.0	6.99	0.00	0.50	Poor	Clear	NONE

Meas.
Number

Date Time

Time
Datum

Measurement
Used?

Who

Measuring
Agency

Stream
flow
(ft³/s)

Gage
Height
(ft)

GH
Change
(ft)

Meas.
Duration
(hr)

Meas.
Rated

Control

Flow
Adjust.
Code

2025-08-27 10:34:17

PDT

Yes

KBARRIOS

USGS

238

8.93

-0.01

0.24

Fair

Clear

NONE

2025-07-08 12:02:58

PDT

Yes

KBARRIOS

USGS

230

8.78

0.01

0.50

Poor

Clear

NONE

2025-05-21 15:15:16

PDT

Yes

KBARRIOS/YGA

USGS

2390

12.94

0.03

0.41

Poor

Clear

NONE

2024-10-15 14:03:37

PDT

Yes

KBARRIOS/AMI

USGS

7.21

6.67

0.00

2.18

Poor

Clear

NONE

2024-09-04 13:01:18

PDT

Yes

KBARRIOS

USGS

18.3

7.01

0.00

1.13

Poor

Clear

NONE

2024-07-24 13:28:58

PDT

Yes

KBARRIOS

USGS

240

8.72

0.01

0.23

Poor

Clear

NONE

2024-06-05 14:33

PDT

2024-06-05 13:51:32

PDT

Yes

KBARRIOS/YGA

USGS

2820

13.76

0.03

0.40

Poor

Clear

NONE

2023-10-11 12:26:56

PDT

Yes

KBARRIOS/JCH

USGS

50.2

7.57

0.00

2.00

Poor

Clear

NONE

2023-08-31 11:29:07

PDT

Yes

YGAO/JCHASE

USGS

195

8.71

0.01

0.25

Poor

Clear

NONE

2023-08-31 11:03:27

PDT

Yes

YGAO/JCHASE

USGS

193

8.71

0.01

0.23

Poor

Clear

NONE

2023-06-29 15:19

PDT

Yes

KBARRIOS

USGS

3390

15.15

-0.08

0.66

Poor

Clear

NONE

2022-10-04 13:12:27

PDT

Yes

trhiett/kbar

USGS

16.8

7.00

0.01

0.90

Poor

Clear

NONE

49F

2022-10-03 13:00

PDT

49E

2022-10-03 13:00

PDT

49D

2022-10-03 13:00

PDT

49C

2022-10-03 13:00

PDT

49B

2022-10-03 13:00

PDT

49A

2022-10-03 13:00

PDT

2022-08-09 13:42:29

PDT

Yes

trhiett/kbar

USGS

99.2

8.06

0.00

1.50

Poor

Clear

NONE

2022-06-13 14:00:08

PDT

Yes

trhiett/jrgr

USGS

834

10.95

-0.02

0.40

Poor

Clear

OTHR

2022-06-13 13:21:23

PDT

Yes

trhiett/jrgr

USGS

854

10.96

0.00

0.40

Poor

Clear

OTHR

2022-05-19 14:30:43

PDT

2020-10-19 12:23:52

PDT

Yes

BDC

USGS

4.78

6.54

0.00

0.60

Poor

Clear

NONE

2020-09-03 11:39:17

PDT

Yes

TRH

USGS

16.7

6.93

0.00

0.73

Poor

Clear

NONE

2020-06-11 11:43

PDT

Yes

JDJ/ JFC

USGS

515

10.08

0.02

0.75

Poor

Clear

OTHR

2020-02-27 11:52:04

PST

Yes

JDJ/MDR/TRH

USGS

96.0

8.00

0.00

2.00

Poor

Clear

NONE

2019-12-09 12:17:32

PST

Yes

JDJ/TRH

USGS

46.1

7.57

0.05

1.00

Poor

Clear

NONE

2019-10-10 12:08

PDT

Yes

JDJ

USGS

15.4

6.98

0.01

1.00

Poor

Clear

NONE

2019-05-02 11:41:22

PDT

2019-04-25 13:42:06

PDT

2018-12-20 12:49:24

PST

Yes

JDJ/MAO

USGS

55.1

7.77

0.01

1.00

Poor

Clear

NONE

2018-10-18 14:46:54

PDT

Yes

JDJ/YSG/DWB

USGS

15.8

6.87

0.00

1.00

Poor

Clear

NONE

2018-10-18 13:26:12

PDT

Yes

JDJ/YSG/DWB

USGS

15.7

6.87

0.00

1.00

Poor

Clear

NONE

2018-08-16 13:15

PDT

Yes

JDJ / TRH

USGS

57.7

7.65

0.02

1.00

Poor

Clear

NONE

2017-10-12 14:25:01

PDT

Yes

JRG

USGS

42.8

7.48

-0.01

0.75

Poor

Clear

NONE

2016-10-06 12:08

PDT

Yes

JRG

USGS

17.2

6.73

0.00

0.70

Poor

VegetationLight

NONE

2016-10-06 11:29

PDT

Yes

JRG

USGS

15.0

6.74

0.00

0.60

Poor

VegetationLight

NONE

2016-08-25 13:05:30

PDT

Yes

JRG

USGS

30.7

7.23

0.00

1.50

Poor

Clear

NONE

2015-10-07 12:38:44

PDT

Yes

SJB

USGS

22.7

7.03

0.00

0.60

Poor

VegetationLight

NONE

2015-09-02 13:12:36

PDT

Yes

SJB

USGS

16.5

6.86

0.00

0.40

Poor

VegetationLight

NONE

2015-06-30 13:13:28

PDT

Yes

SJB/ORB

USGS

232

8.49

0.00

0.90

Poor

Clear

NONE

2014-10-08 14:12:19

PDT

Yes

SJB/JKH

USGS

19.3

6.69

0.00

0.50

Poor

VegetationLight

NONE

2014-07-15 13:09:43

PDT

Yes

SJB/GC

USGS

88.8

7.84

0.00

0.50

Poor

VegetationLight

NONE

2013-10-22 14:57:42

PDT

Yes

SJB

USGS

15.6

6.74

0.00

0.70

Poor

VegetationLight

NONE

2013-08-15 14:09:52

PDT

Yes

SJB/MRH

USGS

24.7

7.05

-0.01

1.50

Poor

Clear

NONE

2013-07-18 14:24:40

PDT

Yes

SJB

USGS

94.0

7.78

0.00

0.80

Poor

VegetationLight

NONE

2012-09-17 13:39:01

PDT

Yes

TRH

USGS

13.1

6.88

0.00

0.50

Poor

Clear

NONE

2012-08-22 12:49:46

PDT

Yes

TRH

USGS

64.0

7.60

-0.01

0.50

Poor

Clear

NONE

2012-07-25 13:59:51

PDT

Yes

TRH

USGS

82.3

7.67

Poor

Clear

NONE

2011-10-26 12:22:48

PDT

Yes

TRH

USGS

87.5

7.85

0.00

0.50

Poor

Clear

NONE

2011-10-04 11:58:46

PDT

Yes

TRH

USGS

74.8

7.61

0.00

0.50

Poor

Clear

NONE

2011-10-04 11:26:11

PDT

Yes

TRH

USGS

68.3

7.61

0.00

0.50

Poor

Clear

NONE

2010-10-13 14:38

PDT

Yes

TRH

USGS

116

7.97

0.00

0.50

Poor

Clear

NONE

2010-09-01 13:40

PDT

Yes

TRH

USGS

35.4

7.32

0.00

0.50

Poor

Clear

NONE

2009-08-13 11:27

PDT

Yes

TRH

USGS

59.8

7.76

0.00

0.50

Poor

Clear

NONE

2008-10-07 12:32

PDT

Yes

TRH

USGS

22.7

7.05

0.00

0.50

Poor

Clear

NONE

2008-08-28 13:11

PDT

Yes

TRH

USGS

18.6

7.11

0.00

0.50

Poor

Clear

NONE

2008-08-13 10:54

PDT

Yes

TRH

USGS

34.8

7.37

0.00

0.50

Poor

Clear

NONE

2007-10-04 11:47

PDT

Yes

TRH

USGS

11.5

6.76

0.00

0.50

Poor

Clear

NONE

2007-08-22 13:48

PDT

Yes

TRH

USGS

15.8

6.97

0.00

0.60

Poor

Clear

NONE

2007-07-16 13:10

PDT

Yes

TRH

USGS

68.4

7.79

-0.01

0.70

Poor

Clear

NONE

2007-06-27 11:30

PDT

Yes

TRH

USGS

136

8.40

0.00

0.70

Poor

Clear

NONE

2006-10-18 12:30

PDT

Yes

TRH

USGS

16.0

6.99

0.00

0.50

Poor

Clear

NONE