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 05461500 Shell Rock River near Clarksville, IA

Butler County, Iowa

Hydrologic Unit Code 07080202

Latitude 42°47'25", Longitude 92°41'15" NAD27

Drainage area 1,626.00 square miles

Gage datum 916.00 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)	Meas. Rated	Control	Flow Adjust. Code
43	1934-09-20 15:30	CST	Yes	JAS	USGS	38.4	0.50	Fair	Unspecifed	NONE
42	1934-09-07 15:25	CST	Yes	SKJ	USGS	31.9	0.40	Unspecified	Unspecifed	NONE
41	1934-07-26 17:30	CST	Yes	JAS	USGS	17.1	0.26	Unspecified	Unspecifed	NONE
40	1934-05-09 09:10	CST	Yes	SKJ	USGS	66.3	0.72	Unspecified	Unspecifed	NONE
39	1934-03-13 14:15	CST	Yes	SKJ	USGS	62.9	0.68	Unspecified	Unspecifed	NONE
38	1933-11-18 12:50	CST	Yes	SKJ/RGK	USGS	72.3	0.84	Unspecified	Unspecifed	NONE
37	1933-08-23 16:55	CST	Yes	HPE/RGK	USGS	49.8	0.64	Poor	Unspecifed	NONE
36	1933-08-04 12:25	CST	Yes	RGK	USGS	71.5	0.82	Unspecified	Unspecifed	NONE
35	1933-06-15 13:10	CST	Yes	RGK	USGS	167	1.26	Unspecified	Unspecifed	NONE
34	1933-04-06 11:05	CST	Yes	RGK/HPE	USGS	4900	6.89	Unspecified	Unspecifed	NONE
33	1933-03-30 13:00	CST	Yes	RGK	USGS	9480	10.27	Unspecified	Unspecifed	NONE
32	1933-03-14 14:05	CST	Yes	RGK	USGS	360	1.64	Unspecified	Unspecifed	NONE
31	1927-05-03 10:45	CST	Yes	USGS	USGS	813	2.55	Unspecified	Unspecifed	NONE
30	1927-03-21 12:20	CST	Yes	USGS	USGS	1640	3.71	Good	Unspecifed	NONE
29	1926-10-28 16:10	CST	Yes	USGS	USGS	231	1.34	Fair	Unspecifed	NONE
28	1926-08-01 11:45	CST	Yes	USGS	USGS	393	1.71	Fair	Unspecifed	NONE
27	1926-07-30 16:25	CST	Yes	USGS	USGS	76.9	0.68	Unspecified	Unspecifed	NONE
26	1926-04-28 06:20	CST	Yes	USGS	USGS	273	1.42	Good	Unspecifed	NONE
25	1925-06-04 09:35	CST	Yes	USGS	USGS	72.0	0.62	Good	Unspecifed	NONE
24	1924-10-14 15:00	CST	Yes	USGS	USGS	164	1.08	Good	Unspecifed	NONE
23	1924-05-20 15:00	CST	Yes	USGS	USGS	288	1.43	Good	Unspecifed	NONE
22	1923-06-25 17:00	CST	Yes	USGS	USGS	84.0	0.78	Good	Unspecifed	NONE
21	1922-09-12 12:50	CST	Yes	USGS	USGS	75.6	0.69	Good	Unspecifed	NONE
20	1922-06-16 09:30	CST	Yes	USGS	USGS	191	1.14	Good	Unspecifed	NONE
19	1921-09-27 08:15	CST	Yes	USGS	USGS	364	1.79	Good	Unspecifed	NONE
18	1921-06-01 14:30	CST	Yes	USGS	USGS	2390	4.53	Good	Unspecifed	NONE
17	1921-05-24 16:15	CST	Yes	USGS	USGS	905	2.66	Good	Unspecifed	NONE
16	1920-08-31 10:00	CST	Yes	USGS	USGS	285	1.60	Good	Unspecifed	NONE
15	1920-04-16 13:00	CST	Yes	USGS	USGS	737	2.39	Good	Unspecifed	NONE
14	1920-01-07 15:15	CST	Yes	USGS	USGS	114	1.93	Good	Unspecifed	NONE
13	1919-09-09 09:20	CST	Yes	USGS	USGS	169	1.23	Good	Unspecifed	NONE
12	1919-07-26 07:30	CST	Yes	USGS	USGS	329	1.76	Good	Unspecifed	NONE
11	1919-05-15 07:15	CST	Yes	USGS	USGS	1060	2.90	Unspecified	Unspecifed	NONE
10	1919-03-25 08:20	CST	Yes	USGS	USGS	1980	4.13	Unspecified	Unspecifed	NONE
9	1918-10-13 14:15	CST	Yes	USGS	USGS	287	1.73	Good	Clear	NONE
8	1918-03-24 08:05	CST	Yes	USGS	USGS	1290	3.42	Unspecified	Unspecifed	NONE
7	1917-09-15 08:55	CST	Yes	USGS	USGS	245	1.67	Unspecified	Unspecifed	NONE
6	1917-06-25 15:10	CST	Yes	USGS	USGS	2660	5.01	Good	Unspecifed	NONE
5	1916-11-12 15:00	CST	Yes	USGS	USGS	274	1.71	Unspecified	Unspecifed	NONE
4	1916-07-21 13:35	CST	Yes	USGS	USGS	296	1.81	Unspecified	Unspecifed	NONE
3	1915-09-11 15:08	CST	Yes	USGS	USGS	330	1.92	Unspecified	Unspecifed	NONE
2	1915-06-07 09:15	CST	Yes	USGS	USGS	2740	5.21	Unspecified	Unspecifed	NONE
1	1915-05-31 08:42	CST	Yes	CH	USGS	7490	9.07	Unspecified	Unspecifed	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

1934-09-20 15:30

CST

Yes

JAS

USGS

38.4

0.50

Fair

Unspecifed

NONE

1934-09-07 15:25

CST

Yes

SKJ

USGS

31.9

0.40

Unspecified

Unspecifed

NONE

1934-07-26 17:30

CST

Yes

JAS

USGS

17.1

0.26

Unspecified

Unspecifed

NONE

1934-05-09 09:10

CST

Yes

SKJ

USGS

66.3

0.72

Unspecified

Unspecifed

NONE

1934-03-13 14:15

CST

Yes

SKJ

USGS

62.9

0.68

Unspecified

Unspecifed

NONE

1933-11-18 12:50

CST

Yes

SKJ/RGK

USGS

72.3

0.84

Unspecified

Unspecifed

NONE

1933-08-23 16:55

CST

Yes

HPE/RGK

USGS

49.8

0.64

Poor

Unspecifed

NONE

1933-08-04 12:25

CST

Yes

RGK

USGS

71.5

0.82

Unspecified

Unspecifed

NONE

1933-06-15 13:10

CST

Yes

RGK

USGS

167

1.26

Unspecified

Unspecifed

NONE

1933-04-06 11:05

CST

Yes

RGK/HPE

USGS

4900

6.89

Unspecified

Unspecifed

NONE

1933-03-30 13:00

CST

Yes

RGK

USGS

9480

10.27

Unspecified

Unspecifed

NONE

1933-03-14 14:05

CST

Yes

RGK

USGS

360

1.64

Unspecified

Unspecifed

NONE

1927-05-03 10:45

CST

Yes

USGS

813

2.55

Unspecified

Unspecifed

NONE

1927-03-21 12:20

CST

Yes

USGS

1640

3.71

Good

Unspecifed

NONE

1926-10-28 16:10

CST

Yes

USGS

231

1.34

Fair

Unspecifed

NONE

1926-08-01 11:45

CST

Yes

USGS

393

1.71

Fair

Unspecifed

NONE

1926-07-30 16:25

CST

Yes

USGS

76.9

0.68

Unspecified

Unspecifed

NONE

1926-04-28 06:20

CST

Yes

USGS

273

1.42

Good

Unspecifed

NONE

1925-06-04 09:35

CST

Yes

USGS

72.0

0.62

Good

Unspecifed

NONE

1924-10-14 15:00

CST

Yes

USGS

164

1.08

Good

Unspecifed

NONE

1924-05-20 15:00

CST

Yes

USGS

288

1.43

Good

Unspecifed

NONE

1923-06-25 17:00

CST

Yes

USGS

84.0

0.78

Good

Unspecifed

NONE

1922-09-12 12:50

CST

Yes

USGS

75.6

0.69

Good

Unspecifed

NONE

1922-06-16 09:30

CST

Yes

USGS

191

1.14

Good

Unspecifed

NONE

1921-09-27 08:15

CST

Yes

USGS

364

1.79

Good

Unspecifed

NONE

1921-06-01 14:30

CST

Yes

USGS

2390

4.53

Good

Unspecifed

NONE

1921-05-24 16:15

CST

Yes

USGS

905

2.66

Good

Unspecifed

NONE

1920-08-31 10:00

CST

Yes

USGS

285

1.60

Good

Unspecifed

NONE

1920-04-16 13:00

CST

Yes

USGS

737

2.39

Good

Unspecifed

NONE

1920-01-07 15:15

CST

Yes

USGS

114

1.93

Good

Unspecifed

NONE

1919-09-09 09:20

CST

Yes

USGS

169

1.23

Good

Unspecifed

NONE

1919-07-26 07:30

CST

Yes

USGS

329

1.76

Good

Unspecifed

NONE

1919-05-15 07:15

CST

Yes

USGS

1060

2.90

Unspecified

Unspecifed

NONE

1919-03-25 08:20

CST

Yes

USGS

1980

4.13

Unspecified

Unspecifed

NONE

1918-10-13 14:15

CST

Yes

USGS

287

1.73

Good

Clear

NONE

1918-03-24 08:05

CST

Yes

USGS

1290

3.42

Unspecified

Unspecifed

NONE

1917-09-15 08:55

CST

Yes

USGS

245

1.67

Unspecified

Unspecifed

NONE

1917-06-25 15:10

CST

Yes

USGS

2660

5.01

Good

Unspecifed

NONE

1916-11-12 15:00

CST

Yes

USGS

274

1.71

Unspecified

Unspecifed

NONE

1916-07-21 13:35

CST

Yes

USGS

296

1.81

Unspecified

Unspecifed

NONE

1915-09-11 15:08

CST

Yes

USGS

330

1.92

Unspecified

Unspecifed

NONE

1915-06-07 09:15

CST

Yes

USGS

2740

5.21

Unspecified

Unspecifed

NONE

1915-05-31 08:42

CST

Yes

USGS

7490

9.07

Unspecified

Unspecifed

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: 2026-01-22 00:45:59 EST
0.41 0.39 vaww01