USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

USGS 05463100 Black Hawk Creek near Grundy Center, IA

Grundy County, Iowa

Hydrologic Unit Code 07080205

Latitude 42°21'43", Longitude 92°43'45" NAD27

Drainage area 71.0 square miles

Gage datum 950 feet above NGVD29

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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
13	1976-09-10 12:35	CDT	Yes	PJD	USGS	4.17				Good	Clear	NONE
12	1975-08-05 16:00	CDT	Yes	DDH	USGS	8.07	20.50			Fair	Clear	NONE
11	1973-09-07 15:10	CDT	Yes	ARC	USGS	13.5	20.04			Good	Clear	NONE
10	1971-09-02 10:00	CDT	Yes	JHH	USGS	4.00	20.84	0.00	0.20	Good	Clear	NONE
9	1970-07-07 16:35	CDT	Yes	LEB	USGS	10.2	20.62	0.00	0.30	Good	Clear	NONE
8	1966-09-08 10:10	CDT	Yes	DER	USGS	11.7	20.35			Good	Clear	NONE
7	1964-08-19 14:35	CDT	Yes	DHA	USGS	3.23	20.24			Good	Clear	NONE
6	1961-08-31 09:10	CDT	Yes	DER	USGS	6.53	19.93	0.00		Good	Clear	NONE
5	1960-10-05 -- --	--	Yes	?S	USGS	10.7	19.95			Good		NONE
4	1959-05-14 16:30	CDT	Yes	SM	USGS	28.3				Good	Clear	NONE
3	1958-10-20 16:40	CDT	Yes	TSJ	USGS	9.59	19.87	0.00	0.80	Good	DebrisLight	NONE
2	1958-05-08 09:50	CDT	Yes	DER	USGS	15.5	19.67			Unspecified		NONE
1	1957-09-24 15:15	CDT	Yes	S	USGS	8.49	19.90	0.00	0.60	Good	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

1976-09-10 12:35

CDT

Yes

PJD

USGS

4.17

Good

Clear

NONE

1975-08-05 16:00

CDT

Yes

DDH

USGS

8.07

20.50

Fair

Clear

NONE

1973-09-07 15:10

CDT

Yes

ARC

USGS

13.5

20.04

Good

Clear

NONE

1971-09-02 10:00

CDT

Yes

JHH

USGS

4.00

20.84

0.00

0.20

Good

Clear

NONE

1970-07-07 16:35

CDT

Yes

LEB

USGS

10.2

20.62

0.00

0.30

Good

Clear

NONE

1966-09-08 10:10

CDT

Yes

DER

USGS

11.7

20.35

Good

Clear

NONE

1964-08-19 14:35

CDT

Yes

DHA

USGS

3.23

20.24

Good

Clear

NONE

1961-08-31 09:10

CDT

Yes

DER

USGS

6.53

19.93

0.00

Good

Clear

NONE

1960-10-05 -- --

Yes

USGS

10.7

19.95

Good

NONE

1959-05-14 16:30

CDT

Yes

USGS

28.3

Good

Clear

NONE

1958-10-20 16:40

CDT

Yes

TSJ

USGS

9.59

19.87

0.00

0.80

Good

DebrisLight

NONE

1958-05-08 09:50

CDT

Yes

DER

USGS

15.5

19.67

Unspecified

NONE

1957-09-24 15:15

CDT

Yes

USGS

8.49

19.90

0.00

0.60

Good

Clear

NONE