USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

USGS 11183670 WALNUT C A DIAMOND BLVD BRIDGE NR CONCORD CA

Contra Costa County, California

Hydrologic Unit Code 18050001

Latitude 37°58'10.39", Longitude 122°03'13.62" NAD83

Drainage area 85.3 square miles

Gage datum 33 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
16	2022-05-19 09:26:54	PDT	Yes	BDCYR	USGS	7.45	8.80	0.00	0.40	Good	Clear	NONE
15	2022-04-28 12:54:06	PDT	Yes	BDCYR	USGS	10.7	8.88	0.01	0.50	Good	Clear	NONE
14	2022-04-21 10:02	PDT	Yes	BDCYR	USGS	452	13.04	-0.04	0.40	Fair	Clear	OTHR
13	2022-04-05 11:14:45	PDT	Yes	BDCYR	USGS	9.63	8.87	0.00	0.50	Good	Clear	NONE
12	2022-03-11 08:49:46	PST	Yes	BDCYR	USGS	9.89	9.01	0.00	0.50	Fair	DebrisLight	NONE
11	2022-01-28 11:15:04	PST	Yes	BDCYR	USGS	14.4	9.02	0.00	0.50	Good	Clear	NONE
10	2022-01-04 11:09:56	PST	Yes	BDCYR	USGS	156	10.96	-0.06	0.70	Good	Clear	NONE
9	2021-12-23 12:29:14	PST	Yes	BDCYR	USGS	2420	16.97	-0.58	0.80	Fair		NONE
8	2021-12-16 14:31:51	PST	Yes	BDCYR	USGS	230	11.71	-0.14	0.70	Good	Unspecifed	NONE
7	2021-12-13 12:30:10	PST	Yes	LCANNAR/BDCY	USGS	1500	15.90	-0.17	0.70	Fair	DebrisLight	NONE
6	2021-12-13 10:39:35	PST	Yes	LCANNAR/BDCY	USGS	1270	15.52	0.31	0.40	Poor	DebrisLight	NONE
5	2021-11-22 13:36:20	PST	Yes	BDCYR	USGS	6.59	8.93	0.00	0.50	Good	Clear	NONE
4	2021-11-09 09:21:22	PST	Yes	BDCYR	USGS	153	11.28	-0.10	0.50	Good	VegetationLight	NONE
3	2021-11-04 12:16:33	PDT	Yes	BDCYR	USGS	9.87	9.10	0.00	0.60	Good	DebrisLight	NONE
2	2021-01-05 12:24:40	PST	Yes	BDC	USGS	23.6	9.38	-0.03	0.60	Good	DebrisHeavy	NONE
1	2020-12-29 15:47:18	PST	Yes	LAC/CSS/TKN	USGS	6.78	9.09			Fair	DebrisLight	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

2022-05-19 09:26:54

PDT

Yes

BDCYR

USGS

7.45

8.80

0.00

0.40

Good

Clear

NONE

2022-04-28 12:54:06

PDT

Yes

BDCYR

USGS

10.7

8.88

0.01

0.50

Good

Clear

NONE

2022-04-21 10:02

PDT

Yes

BDCYR

USGS

452

13.04

-0.04

0.40

Fair

Clear

OTHR

2022-04-05 11:14:45

PDT

Yes

BDCYR

USGS

9.63

8.87

0.00

0.50

Good

Clear

NONE

2022-03-11 08:49:46

PST

Yes

BDCYR

USGS

9.89

9.01

0.00

0.50

Fair

DebrisLight

NONE

2022-01-28 11:15:04

PST

Yes

BDCYR

USGS

14.4

9.02

0.00

0.50

Good

Clear

NONE

2022-01-04 11:09:56

PST

Yes

BDCYR

USGS

156

10.96

-0.06

0.70

Good

Clear

NONE

2021-12-23 12:29:14

PST

Yes

BDCYR

USGS

2420

16.97

-0.58

0.80

Fair

NONE

2021-12-16 14:31:51

PST

Yes

BDCYR

USGS

230

11.71

-0.14

0.70

Good

Unspecifed

NONE

2021-12-13 12:30:10

PST

Yes

LCANNAR/BDCY

USGS

1500

15.90

-0.17

0.70

Fair

DebrisLight

NONE

2021-12-13 10:39:35

PST

Yes

LCANNAR/BDCY

USGS

1270

15.52

0.31

0.40

Poor

DebrisLight

NONE

2021-11-22 13:36:20

PST

Yes

BDCYR

USGS

6.59

8.93

0.00

0.50

Good

Clear

NONE

2021-11-09 09:21:22

PST

Yes

BDCYR

USGS

153

11.28

-0.10

0.50

Good

VegetationLight

NONE

2021-11-04 12:16:33

PDT

Yes

BDCYR

USGS

9.87

9.10

0.00

0.60

Good

DebrisLight

NONE

2021-01-05 12:24:40

PST

Yes

BDC

USGS

23.6

9.38

-0.03

0.60

Good

DebrisHeavy

NONE

2020-12-29 15:47:18

PST

Yes

LAC/CSS/TKN

USGS

6.78

9.09

Fair

DebrisLight

NONE