USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

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USGS 11441800 SILVER C BL JUNCTION DAM NR POLLOCK PINES CA

El Dorado County, California

Hydrologic Unit Code 18020129

Latitude 38°51'08", Longitude 120°27'22" NAD27

Drainage area 146 square miles

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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
1031	2025-08-12 12:59:48	PDT	Yes	eparvin	USGS	16.1	2.75	0.00	0.55	Fair	Clear	NONE
1030	2025-08-12 12:18:59	PDT	Yes	eparvin	USGS	15.1	2.76	0.00	0.70	Fair	Clear	NONE
1029	2025-05-13 14:47:04	PDT	Yes	eparvin	USGS	77.6	4.04	0.00	0.75	Poor	Clear	NONE
1028	2024-05-02 16:17	PDT	Yes	EPARVIN	USGS	79.3	4.12	0.00	0.55	Fair	Clear	NONE
1027	2023-12-20 14:14:55	PST	Yes	JCHASE/ ESTH	USGS	20.5	2.90			Poor	Clear	NONE
1026	2023-12-20 13:32	PST	Yes	JCHASE/ ESTH	USGS	17.5	2.90			Poor	Clear	NONE
1024	2023-10-04 16:55:39	PDT	Yes	eparvin	USGS	15.2	2.70	0.00	0.49	Fair	Clear	NONE
1025	2023-10-04 15:56:32	PDT	Yes	eparvin	USGS	14.1	2.70	0.00	1.20	Poor	Clear	NONE
1023	2023-06-21 12:03:45	PDT	Yes	EPARVIN	USGS	72.1	3.98	0.00	0.90	Fair	Clear	NONE
1022	2022-10-11 15:32:01	PDT	Yes	EPARVIN	USGS	16.0	2.68	0.00	0.70	Fair		NONE
1021	2022-06-15 13:52:38	PDT	Yes	EPARVIN	USGS	55.3	3.75			Fair	Clear	NONE
1020	2021-09-29 11:57:31	PDT	Yes	PHONEYWE/KB	USGS	13.1	2.68	0.00	0.50	Fair	DebrisHeavy	NONE
1019	2021-05-02 12:24:23	PDT	Yes	EPARVIN	USGS	49.0	4.17	0.00	0.60	Fair	DebrisModerate	NONE
1018	2020-09-22 17:13:47	PDT	Yes	EMP	USGS	11.9	2.66			Fair	DebrisHeavy	NONE
1017	2020-06-10 13:35:32	PDT	Yes	emp	USGS	41.0	3.87	0.00	0.80	Fair	DebrisHeavy	NONE
1016	2019-09-17 11:57	PDT	Yes	EMP	USGS	18.9	2.81	-0.01	0.55	Fair	Clear	NONE
1015	2019-07-02 15:37:33	PDT	Yes	EMP	USGS	36.3	3.37	0.00	0.55	Fair	Clear	NONE
1014	2018-09-25 11:19:24	PDT	Yes	EMP	USGS	15.3	2.64	0.00	0.55	Fair	Clear	NONE
1013	2018-06-05 12:09	PDT	Yes	EMP	USGS	59.9	3.83	0.00	0.78	Fair	VegetationLight	NONE
1012	2017-09-26 15:41:07	PDT	Yes	PH/KB	USGS	23.5	2.89	0.00	0.50	Fair	Clear	NONE
1011	2017-07-13 12:02:42	PDT	Yes	PH	USGS	41.1			0.90	Fair	Unspecifed	NONE
1010	2016-09-29 12:18	PDT	Yes	PH/SMUD	USGS	18.2	2.23	0.00	0.30	Fair	Clear	NONE
1009	2016-05-17 13:45:30	PDT	Yes	PH/GW	USGS	70.6	3.45	0.00	0.90	Fair	Clear	NONE
1008	2015-09-15 14:40	PDT	Yes	PH/SMUD	USGS	9.94	1.80	0.00	0.50	Fair	VegetationLight	NONE
1007	2015-06-04 12:47	PDT	Yes	PH/SMUD	USGS	24.2	2.45	0.00	0.50	Fair	Clear	NONE
1006	2014-09-11 14:16	PDT	Yes	PH/SMUD	USGS	10.1	1.80	0.00	0.50	Fair	Clear	NONE
1005	2014-05-29 12:32:30	PDT	Yes	PH/SMUD	USGS	10.3	1.81	0.00	0.50	Fair	Clear	NONE
1004	2013-09-16 16:14:30	PDT	Yes	PH/SMUD	USGS	15.1	2.09	0.00	0.50	Fair	Clear	NONE
1003	2013-05-30 12:13	PDT	Yes	PH/GW	USGS	15.7	2.07	0.00	0.60	Fair	Clear	NONE
1002	2012-09-20 13:40:30	PDT	Yes	PH/GW	USGS	10.4	1.82	0.00	0.50	Fair	Clear	NONE
1001	2012-06-05 14:04	PDT	Yes	PH/GW	USGS	11.0	1.82	0.00	0.40	Fair	Clear	NONE
1000	2011-09-29 12:41	PDT	Yes	PH/GW	USGS	21.5	2.34	0.00	0.40	Fair		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

1031

2025-08-12 12:59:48

PDT

Yes

eparvin

USGS

16.1

2.75

0.00

0.55

Fair

Clear

NONE

1030

2025-08-12 12:18:59

PDT

Yes

eparvin

USGS

15.1

2.76

0.00

0.70

Fair

Clear

NONE

1029

2025-05-13 14:47:04

PDT

Yes

eparvin

USGS

77.6

4.04

0.00

0.75

Poor

Clear

NONE

1028

2024-05-02 16:17

PDT

Yes

EPARVIN

USGS

79.3

4.12

0.00

0.55

Fair

Clear

NONE

1027

2023-12-20 14:14:55

PST

Yes

JCHASE/ ESTH

USGS

20.5

2.90

Poor

Clear

NONE

1026

2023-12-20 13:32

PST

Yes

JCHASE/ ESTH

USGS

17.5

2.90

Poor

Clear

NONE

1024

2023-10-04 16:55:39

PDT

Yes

eparvin

USGS

15.2

2.70

0.00

0.49

Fair

Clear

NONE

1025

2023-10-04 15:56:32

PDT

Yes

eparvin

USGS

14.1

2.70

0.00

1.20

Poor

Clear

NONE

1023

2023-06-21 12:03:45

PDT

Yes

EPARVIN

USGS

72.1

3.98

0.00

0.90

Fair

Clear

NONE

1022

2022-10-11 15:32:01

PDT

Yes

EPARVIN

USGS

16.0

2.68

0.00

0.70

Fair

NONE

1021

2022-06-15 13:52:38

PDT

Yes

EPARVIN

USGS

55.3

3.75

Fair

Clear

NONE

1020

2021-09-29 11:57:31

PDT

Yes

PHONEYWE/KB

USGS

13.1

2.68

0.00

0.50

Fair

DebrisHeavy

NONE

1019

2021-05-02 12:24:23

PDT

Yes

EPARVIN

USGS

49.0

4.17

0.00

0.60

Fair

DebrisModerate

NONE

1018

2020-09-22 17:13:47

PDT

Yes

EMP

USGS

11.9

2.66

Fair

DebrisHeavy

NONE

1017

2020-06-10 13:35:32

PDT

Yes

emp

USGS

41.0

3.87

0.00

0.80

Fair

DebrisHeavy

NONE

1016

2019-09-17 11:57

PDT

Yes

EMP

USGS

18.9

2.81

-0.01

0.55

Fair

Clear

NONE

1015

2019-07-02 15:37:33

PDT

Yes

EMP

USGS

36.3

3.37

0.00

0.55

Fair

Clear

NONE

1014

2018-09-25 11:19:24

PDT

Yes

EMP

USGS

15.3

2.64

0.00

0.55

Fair

Clear

NONE

1013

2018-06-05 12:09

PDT

Yes

EMP

USGS

59.9

3.83

0.00

0.78

Fair

VegetationLight

NONE

1012

2017-09-26 15:41:07

PDT

Yes

PH/KB

USGS

23.5

2.89

0.00

0.50

Fair

Clear

NONE

1011

2017-07-13 12:02:42

PDT

Yes

USGS

41.1

0.90

Fair

Unspecifed

NONE

1010

2016-09-29 12:18

PDT

Yes

PH/SMUD

USGS

18.2

2.23

0.00

0.30

Fair

Clear

NONE

1009

2016-05-17 13:45:30

PDT

Yes

PH/GW

USGS

70.6

3.45

0.00

0.90

Fair

Clear

NONE

1008

2015-09-15 14:40

PDT

Yes

PH/SMUD

USGS

9.94

1.80

0.00

0.50

Fair

VegetationLight

NONE

1007

2015-06-04 12:47

PDT

Yes

PH/SMUD

USGS

24.2

2.45

0.00

0.50

Fair

Clear

NONE

1006

2014-09-11 14:16

PDT

Yes

PH/SMUD

USGS

10.1

1.80

0.00

0.50

Fair

Clear

NONE

1005

2014-05-29 12:32:30

PDT

Yes

PH/SMUD

USGS

10.3

1.81

0.00

0.50

Fair

Clear

NONE

1004

2013-09-16 16:14:30

PDT

Yes

PH/SMUD

USGS

15.1

2.09

0.00

0.50

Fair

Clear

NONE

1003

2013-05-30 12:13

PDT

Yes

PH/GW

USGS

15.7

2.07

0.00

0.60

Fair

Clear

NONE

1002

2012-09-20 13:40:30

PDT

Yes

PH/GW

USGS

10.4

1.82

0.00

0.50

Fair

Clear

NONE

1001

2012-06-05 14:04

PDT

Yes

PH/GW

USGS

11.0

1.82

0.00

0.40

Fair

Clear

NONE

1000

2011-09-29 12:41

PDT

Yes

PH/GW

USGS

21.5

2.34

0.00

0.40

Fair

NONE