USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

USGS 01480878 Unn Trib to Valley Cr at Hwy 30 at Exton, PA

Chester County, Pennsylvania

Hydrologic Unit Code 02040205

Latitude 40°01'35", Longitude 75°38'11" NAD27

Drainage area 2.64 square miles

Gage datum 290 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
25	1999-09-14 13:15	EDT	Yes	AM	USGS	0.04				Fair	Clear	NONE
24	1999-08-17 12:00	EDT	Yes	AM	USGS	0.00				Unspecified		NONE
23	1999-08-03 08:30	EDT	Yes	AM	USGS	0.00				Unspecified		NONE
22	1999-07-20 14:20	EDT	Yes	AM	USGS	0.34	1.43	0.00	0.30	Good	Clear	NONE
21	1999-03-31 10:10	EST	Yes	AGR/DAT	USGS	1.24	1.65			Fair	Clear	NONE
20	1998-10-26 11:30	EST	Yes	DCH	USGS	0.26	1.45	0.00	0.40	Fair	Clear	NONE
19	1998-10-06 09:23	EDT	Yes	DCH/AJT	USGS	0.15	1.39	0.00	0.30	Fair	Clear	NONE
18	1998-08-31 09:20	EDT	Yes	DCH/AJT	USGS	0.35	1.42	0.00	0.40	Fair	Clear	NONE
17	1998-07-27 09:05	EDT	Yes	DCH	USGS	0.63	1.50	0.00	0.30	Fair	Clear	NONE
16	1998-06-29 09:05	EDT	Yes	DCH/AJT	USGS	2.28	1.71	-0.01	0.30	Fair	Clear	NONE
15	1998-05-28 07:45	EDT	Yes	DCH	USGS	1.72	1.68	0.00	0.40	Good	Clear	NONE
14	1998-04-20 08:44	EDT	Yes	DCH	USGS	3.69	1.81	0.00	0.40	Good	Clear	NONE
13	1998-03-24 10:30	EST	Yes	DCH	USGS	2.75	1.77	0.00	0.50	Good	Clear	NONE
12	1998-03-09 11:20	EST	Yes	DCH/JEB	USGS	31.3	2.64	-0.08	0.40	Good	Clear	NONE
11	1998-02-18 11:00	EST	Yes	DCH/JEB	USGS	3.02	1.83	0.00	0.40	Good	Clear	NONE
10	1998-01-23 14:20	EST	Yes	DCH/AJT	USGS	60.2	3.30	0.12	0.20	Fair	Clear	NONE
9	1998-01-23 12:10	EST	Yes	AJT/DCH	USGS	21.3	2.53	0.07	0.40	Fair	Clear	NONE
8	1998-01-21 10:05	EST	Yes	DCH	USGS	0.77	1.56	0.00	0.40	Good	Clear	NONE
7	1997-12-17 10:20	EST	Yes	DCH/AJT	USGS	0.34	1.55	0.00	0.40	Fair	DebrisHeavy	NONE
6	1997-11-24 11:05	EST	Yes	DCH	USGS	0.59	1.64	0.00	0.30	Fair	DebrisHeavy	NONE
5	1997-10-08 09:25	EDT	Yes	DCH	USGS	0.44	1.59	0.00	0.20	Good	Clear	NONE
4	1997-09-11 12:41	EDT	Yes	EHK	USGS	32.0	2.85	-0.24	0.80	Fair	Clear	NONE
3	1997-09-11 09:03	EDT	Yes	DCH/AJT	USGS	15.0	2.29	-0.05	0.20	Good	Clear	NONE
2	1997-08-05 09:50	EDT	Yes	DCH	USGS	0.64	1.60	0.00	0.40	Good	Clear	NONE
1	1997-06-10 12:05	EDT	Yes	DCH/AJT	USGS	1.24	1.70	0.00	0.30	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

1999-09-14 13:15

EDT

Yes

USGS

0.04

Fair

Clear

NONE

1999-08-17 12:00

EDT

Yes

USGS

0.00

Unspecified

NONE

1999-08-03 08:30

EDT

Yes

USGS

0.00

Unspecified

NONE

1999-07-20 14:20

EDT

Yes

USGS

0.34

1.43

0.00

0.30

Good

Clear

NONE

1999-03-31 10:10

EST

Yes

AGR/DAT

USGS

1.24

1.65

Fair

Clear

NONE

1998-10-26 11:30

EST

Yes

DCH

USGS

0.26

1.45

0.00

0.40

Fair

Clear

NONE

1998-10-06 09:23

EDT

Yes

DCH/AJT

USGS

0.15

1.39

0.00

0.30

Fair

Clear

NONE

1998-08-31 09:20

EDT

Yes

DCH/AJT

USGS

0.35

1.42

0.00

0.40

Fair

Clear

NONE

1998-07-27 09:05

EDT

Yes

DCH

USGS

0.63

1.50

0.00

0.30

Fair

Clear

NONE

1998-06-29 09:05

EDT

Yes

DCH/AJT

USGS

2.28

1.71

-0.01

0.30

Fair

Clear

NONE

1998-05-28 07:45

EDT

Yes

DCH

USGS

1.72

1.68

0.00

0.40

Good

Clear

NONE

1998-04-20 08:44

EDT

Yes

DCH

USGS

3.69

1.81

0.00

0.40

Good

Clear

NONE

1998-03-24 10:30

EST

Yes

DCH

USGS

2.75

1.77

0.00

0.50

Good

Clear

NONE

1998-03-09 11:20

EST

Yes

DCH/JEB

USGS

31.3

2.64

-0.08

0.40

Good

Clear

NONE

1998-02-18 11:00

EST

Yes

DCH/JEB

USGS

3.02

1.83

0.00

0.40

Good

Clear

NONE

1998-01-23 14:20

EST

Yes

DCH/AJT

USGS

60.2

3.30

0.12

0.20

Fair

Clear

NONE

1998-01-23 12:10

EST

Yes

AJT/DCH

USGS

21.3

2.53

0.07

0.40

Fair

Clear

NONE

1998-01-21 10:05

EST

Yes

DCH

USGS

0.77

1.56

0.00

0.40

Good

Clear

NONE

1997-12-17 10:20

EST

Yes

DCH/AJT

USGS

0.34

1.55

0.00

0.40

Fair

DebrisHeavy

NONE

1997-11-24 11:05

EST

Yes

DCH

USGS

0.59

1.64

0.00

0.30

Fair

DebrisHeavy

NONE

1997-10-08 09:25

EDT

Yes

DCH

USGS

0.44

1.59

0.00

0.20

Good

Clear

NONE

1997-09-11 12:41

EDT

Yes

EHK

USGS

32.0

2.85

-0.24

0.80

Fair

Clear

NONE

1997-09-11 09:03

EDT

Yes

DCH/AJT

USGS

15.0

2.29

-0.05

0.20

Good

Clear

NONE

1997-08-05 09:50

EDT

Yes

DCH

USGS

0.64

1.60

0.00

0.40

Good

Clear

NONE

1997-06-10 12:05

EDT

Yes

DCH/AJT

USGS

1.24

1.70

0.00

0.30

Good

Clear

NONE