USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 06807550 West Nishnabotna River near Malvern, IA

Mills County, Iowa

Hydrologic Unit Code 10240002

Latitude 40°57'30", Longitude 95°33'22" NAD27

Drainage area 974 square miles

Gage datum 960 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
12	1971-08-31 09:10	CDT	Yes	RDB	USGS	42.0	23.84			Good	Clear	NONE
11	1968-06-18 13:45	CST	Yes	OJR	USGS	53.6	23.17			Good	Clear	NONE
10A	1967-05-23 10:30	CST	Yes	OJR	USGS	45.1	23.46			Good	Clear	NONE
10	1967-05-23 08:20	CST	Yes	OJR	USGS	1.92	26.87			Unspecified	Clear	NONE
9	1966-08-29 13:35	CST	Yes	OJR	USGS	120	-22.95			Good	Clear	NONE
8	1964-10-27 08:20	CST	Yes	RDB	USGS	142	22.65			Unspecified	Clear	NONE
7	1963-11-05 13:40	CST	Yes	102	USGS	76.9	-22.91			Good	Clear	NONE
6	1961-08-30 08:55	CST	Yes	RDB	USGS	185	22.92			Fair	Clear	NONE
5	1960-09-15 13:00	CST	Yes	OJR	USGS	264	-22.19			Good	Clear	NONE
4	1959-10-20 11:15	CST	Yes	FEL	USGS	94.6	22.71			Fair	Clear	NONE
3	1958-10-15 11:25	CST	Yes	OJR	USGS	153	-23.07	-0.01	0.90	Good	Clear	NONE
2	1958-05-14 13:15	CST	Yes	GGP	USGS	113	23.25	0.00	0.40	Unspecified	Clear	NONE
1	1957-09-24 12:45	CST	Yes	FEL	USGS	30.4	23.59			Unspecified	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

1971-08-31 09:10

CDT

Yes

RDB

USGS

42.0

23.84

Good

Clear

NONE

1968-06-18 13:45

CST

Yes

OJR

USGS

53.6

23.17

Good

Clear

NONE

10A

1967-05-23 10:30

CST

Yes

OJR

USGS

45.1

23.46

Good

Clear

NONE

1967-05-23 08:20

CST

Yes

OJR

USGS

1.92

26.87

Unspecified

Clear

NONE

1966-08-29 13:35

CST

Yes

OJR

USGS

120

-22.95

Good

Clear

NONE

1964-10-27 08:20

CST

Yes

RDB

USGS

142

22.65

Unspecified

Clear

NONE

1963-11-05 13:40

CST

Yes

102

USGS

76.9

-22.91

Good

Clear

NONE

1961-08-30 08:55

CST

Yes

RDB

USGS

185

22.92

Fair

Clear

NONE

1960-09-15 13:00

CST

Yes

OJR

USGS

264

-22.19

Good

Clear

NONE

1959-10-20 11:15

CST

Yes

FEL

USGS

94.6

22.71

Fair

Clear

NONE

1958-10-15 11:25

CST

Yes

OJR

USGS

153

-23.07

-0.01

0.90

Good

Clear

NONE

1958-05-14 13:15

CST

Yes

GGP

USGS

113

23.25

0.00

0.40

Unspecified

Clear

NONE

1957-09-24 12:45

CST

Yes

FEL

USGS

30.4

23.59

Unspecified

Clear

NONE

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U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Streamflow Measurements
URL: https://waterdata.usgs.gov/nwis/measurements?

Page Contact Information: Iowa Water Data Support Team
Page Last Modified: 2025-12-19 17:15:58 EST
0.28 0.27 caww02