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Publication Number: FHWA-RD-03-052
Date: May 2005

Field Observations and Evaluations of Streambed Scour at Bridges

APPENDIX A:PIER SCOUR FIELD DATA

Table 23. List of sites.

Site

Stream

State

Route Class

Route Number/Name

Drainage Area (km2)

Slope in Vicinity (m/m)

1

Susitna River

AK

State

3

29785

0.00040

2

Knik River

AK

Unknown

Old Glenn Hwy.

3108

0.00069

3

Knik River

AK

State

1

-

0.00100

4

Tazlina River

AK

State

4

6915

0.00210

5

Tanana River

AK

State

2

34965

0.00060

6

Tanana River

AK

State

3

66304

0.00015

7

Snow River

AK

State

9

389

-

8

Red River

AR

U.S.

71

124398

-

9

Red River

AR

Interstate

30

135550

-

10

Red River

AR

U.S.

82

136428

-

11

South Platte River

CO

State

37

24859

0.00093

12

South Platte River

CO

County

87

31391

0.00132

13

Arkansas River

CO

County

613

-

0.00050

14

Rio Grande River

CO

U.S.

285

4118

0.00075

15

Leipsic River

DE

State

9

-

-

16

Assawoman Bay

DE

State

54

-

-

17

South Altamaha River

GA

Interstate

95

36260

-

18

Eel River

IN

State

59

2279

0.00035

19

Wabash River

IN

State

163

30355

0.00014

20

White River

IN

State

157

11375

0.00020

21

Red River

LA

State

3032

157213

0.00010

22

Red River

LA

State

3032

157213

0.00010

23

Youghiogheny

MD

State

42

764

0.00500

24

Big Pipe Creek

MD

State

194

264

0.00157

25

Choptank River

MD

State

287

-

-

26

Pearl River

MS

State

25

8107

0.00019

27

Pearl River

MS

State

25

8107

0.00019

28

Homochitto River

MS

U.S.

84

469

0.00093

29

Pearl River

MS

U.S.

98

14815

0.00019

30

Pearl River

MS

U.S.

98

14815

0.00019

31

Clarks Fork Yellowstone River

MT

U.S.

310

4685

0.00700

32

Gallatin River

MT

U.S.

191

2137

0.00630

33

Yellowstone River

MT

U.S.

89

7366

0.00220

34

Badger Creek

MT

U.S.

89

619

0.00390

35

Otselic River

NY

State

23

396

0.00040

36

Chemung River

NY

State

427

6491

0.00075

37

Schoharie Creek

NY

State

30

1383

0.00200

38

Susquehanna River

NY

County

314

5781

0.00057

39

Genesee River

NY

County

Bailey Road

2549

0.00090

40

Delaware River

NY

City

6

7951

0.00114

41

Great Miami River

OH

State

128

9402

0.00049

Table 23. List of sites, continued.

Site

Stream

State

Route Class

Route Number/Name

Drainage Area (km2)

Slope in Vicinity (m/m)

42

Hocking River

OH

State

278

1492

0.00038

43

Honey Creek

OH

State

67

386

0.00140

44

Little Miami River

OH

State

350

1748

0.00084

45

Ottawa River

OH

County

122

337

0.00144

46

Scioto River

OH

State

4

1368

0.00008

47

Todd Fork

OH

State

22

679

0.00179

48

Killbuck Creek

OH

County

621

1197

0.00023

49

Pamunkey River

VA

State

614

2800

0.00012

50

Nottoway River

VA

State

653

3680

0.00016

51

Bush River

VA

U.S.

460

166

0.00110

52

Dan River

VA

U.S.

501

7071

0.00025

53

Tye River

VA

State

56

240

0.00290

54

Little Nottoway River

VA

State

603

-

0.00200

55

Reed Creek

VA

State

649

-

0.00010

56

North Fork Holston River

VA

State

633

-

0.00100

57

Mississippi River

IL

State

51/150

1835274

0.00030

58

Mississippi River

MN

State

3

95312

0.00022

59

Clear Creek

OH

U.S.

33

238

0.00190

60

Grand River

OH

State

84

1774

0.00109

61

Great Miami River

OH

State

41

2401

0.00023

62

Mad River

OH

U.S.

36

420

0.00136

63

Massies Creek

OH

U.S.

68

219

0.00357

64

Maumee River

OH

U.S.

127

5895

0.00022

65

Salt Creek

OH

U.S.

50

741

0.00082

66

Scioto River

OH

State

159

9969

0.00035

67

Sugar Creek

OH

U.S.

250

805

0.00087

68

Tuscarawas River

OH

City

Walnut Road

1329

0.00008

69

Tascarwas River

OH

County

14

6216

0.00047

70

Wakatomika Creek

OH

State

16

363

0.00062

71

Walnut Creek

OH

County

17

559

0.00068

72

Minnesota River

MN

County

14

10619

-

73

Pomme De Terre River

MN

County

22

2165

0.00060

74

Brazos River

TX

County

2004

113810

0.00030

75

Mississippi River

MO

Interstate

255

-

0.00010

76

Mississippi River

MO

State

799

1805230

-

77

Middle Fork Crow River

MN

State

4

-

0.00100

78

Pomme De Terre River

MN

U.S.

12

2189

0.00050

79

Agulaize River

OH

State

198

518

0.00060



Table 24. Pier scour observations.

Measurement

Site

State

Date

Time

Pier

Upstream/ Downstream

Pier Type

Pier Shape

Pier Width (m)

Pier Length (m)

Skew (deg)

Velocity (m/s)

Depth (m)

Debris Effects

Bed Material

D16 (mm)

D50 (mm)

D84 (mm)

D95 (mm)

Gradation

Scour Depth (m)

Accuracy (m)

1

2

AK

7/11/1965

15:30

5

Upstream

Single

Sharp

1.8

8.8

0

3.7

5.5

Unknown

Noncohesive

0.92

5.00

27.00

83.00

5.5

1.1

0.2

2

3

AK

6/24/1966

-

1

Upstream

Single

Round

1.5

11.2

0

1.5

2.1

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.6

0.2

3

3

AK

6/28/1966

-

1

Upstream

Single

Round

1.5

11.2

0

0.9

0.9

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.5

0.2

4

3

AK

6/24/1966

-

2

Upstream

Single

Round

1.5

11.2

0

1.6

2.0

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.6

0.2

5

3

AK

6/28/1966

-

2

Upstream

Single

Round

1.5

11.2

0

1.0

0.9

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.6

0.2

6

3

AK

6/17/1966

-

3

Upstream

Single

Round

1.5

11.2

0

0.5

1.2

Unknown

Noncohesive

0.08

0.58

4.00

14.00

6.9

0.3

0.2

7

3

AK

6/24/1966

-

3

Upstream

Single

Round

1.5

11.2

0

1.6

3.0

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.9

0.2

8

3

AK

6/28/1966

-

3

Upstream

Single

Round

1.5

11.2

0

1.1

1.8

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.5

0.2

9

3

AK

6/17/1966

-

4

Upstream

Single

Round

1.5

11.2

0

0.8

1.5

Unknown

Noncohesive

0.08

0.58

4.00

14.00

6.9

0.3

0.2

10

3

AK

6/24/1966

-

4

Upstream

Single

Round

1.5

11.2

0

2.0

3.2

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

1.2

0.2

11

3

AK

6/28/1966

-

4

Upstream

Single

Round

1.5

11.2

0

1.2

2.4

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.6

0.2

12

3

AK

6/17/1966

-

5

Upstream

Single

Round

1.5

11.2

0

0.9

1.2

Unknown

Noncohesive

0.08

0.58

4.00

14.00

6.9

0.3

0.2

13

3

AK

6/24/1966

-

5

Upstream

Single

Round

1.5

11.2

0

1.8

3.0

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

1.4

0.2

14

3

AK

6/28/1966

-

5

Upstream

Single

Round

1.5

11.2

0

1.1

2.3

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.8

0.2

15

3

AK

6/17/1966

-

6

Upstream

Single

Round

1.5

11.2

0

0.3

0.5

Unknown

Noncohesive

0.08

0.58

4.00

14.00

6.9

0.8

0.2

16

3

AK

6/24/1966

-

6

Upstream

Single

Round

1.5

11.2

0

2.1

2.6

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

1.1

0.2

17

3

AK

6/28/1966

-

6

Upstream

Single

Round

1.5

11.2

0

1.1

1.5

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.5

0.2

18

3

AK

6/17/1966

-

7

Upstream

Single

Round

1.5

11.2

0

0.2

0.6

Unknown

Noncohesive

0.08

0.58

4.00

14.00

6.9

1.2

0.2

19

3

AK

6/24/1966

-

7

Upstream

Single

Round

1.5

11.2

0

1.8

3.0

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

1.8

0.2

20

3

AK

6/28/1966

-

7

Upstream

Single

Round

1.5

11.2

0

1.0

2.0

Unknown

Noncohesive

0.39

1.80

8.00

22.00

4.6

0.8

0.2

21

7

AK

9/23/1970

-

5

Unknown

Single

Round

1.0

0.0

0

1.6

1.5

Insignificant

Noncohesive

3.00

7.60

18.00

31.00

3.0

0.8

0.2

22

1

AK

7/2/1971

-

1

Upstream

Single

Sharp

1.5

6.1

0

2.0

5.8

Insignificant

Noncohesive

58.00

70.00

85.00

96.00

1.2

0.8

0.2

23

1

AK

8/11/1971

-

1

Upstream

Single

Sharp

1.5

6.1

0

3.0

5.3

Insignificant

Noncohesive

58.00

70.00

85.00

96.00

1.2

0.6

0.2

24

1

AK

7/2/1971

-

2

Upstream

Single

Sharp

1.5

6.1

0

2.6

4.1

Insignificant

Noncohesive

58.00

70.00

85.00

96.00

1.2

0.8

0.2

25

1

AK

8/11/1971

-

2

Unknown

Single

Sharp

1.5

6.1

0

2.9

6.6

Insignificant

Noncohesive

58.00

70.00

85.00

96.00

1.2

0.6

0.3

26

1

AK

7/2/1971

-

3

Upstream

Single

Sharp

1.5

6.1

0

2.1

3.4

Insignificant

Noncohesive

58.00

70.00

85.00

96.00

1.2

0.6

0.2

27

1

AK

8/11/1971

-

3

Unknown

Single

Sharp

1.5

6.1

0

3.5

5.2

Insignificant

Noncohesive

58.00

70.00

85.00

96.00

1.2

0.6

0.3

28

1

AK

7/2/1971

-

4

Downstream

Single

Sharp

1.5

6.1

0

1.5

4.1

Substantial

Noncohesive

58.00

70.00

85.00

96.00

1.2

1.5

0.2

29

1

AK

8/11/1971

-

4

Downstream

Single

Sharp

1.5

6.1

0

2.9

5.3

Substantial

Noncohesive

58.00

70.00

85.00

96.00

1.2

1.5

0.3

30

5

AK

7/16/1971

-

1

Downstream

Single

Round

1.5

9.4

37

2.2

3.7

Moderate

Noncohesive

5.00

14.00

42.00

86.00

3.0

1.8

0.2

31

5

AK

7/16/1971

-

2

Downstream

Single

Round

1.5

9.4

37

2.2

3.7

Moderate

Noncohesive

5.00

14.00

42.00

86.00

3.0

2.1

0.2

32

5

AK

7/16/1971

-

3

Downstream

Single

Round

1.5

9.4

37

2.1

4.6

Moderate

Noncohesive

5.00

14.00

42.00

86.00

3.0

1.8

0.2

33

5

AK

7/16/1971

-

4

Downstream

Single

Round

1.5

13.5

37

1.7

4.3

Moderate

Noncohesive

5.00

14.00

42.00

86.00

3.0

2.4

0.2

34

6

AK

8/17/1967

-

1

Downstream

Group

Sharp

3.0

14.6

0

2.6

6.7

Moderate

Noncohesive

12.00

15.00

19.00

23.00

1.3

1.8

0.2

35

4

AK

9/2/1971

-

1

Upstream

Group

Round

4.6

0.0

0

2.9

3.7

Insignificant

Noncohesive

68.00

90.00

120.00

144.00

1.3

1.5

0.2

Table 24. Pier scour observations, continued.

Measurement

Site

State

Date

Time

Pier

Upstream/ Downstream

Pier Type

Pier Shape

Pier Width (m)

Pier Length (m)

Skew (deg)

Velocity (m/s)

Depth (m)

Debris Effects

Bed Material

D16 (mm)

D50 (mm)

D84 (mm)

D95 (mm)

Gradation

Scour Depth (m)

Accuracy (m)

36

4

AK

9/4/1971

-

1

Upstream

Group

Round

4.6

0.0

0

3.5

4.6

Insignificant

Noncohesive

68.00

90.00

120.00

144.00

1.3

1.7

0.2

37

8

AR

5/9/1990

15:00

8

Downstream

Group

Round

2.1

9.4

11

2.7

12.3

Unknown

Unknown

-

0.12

-

-

-

2.3

0.2

38

8

AR

5/9/1990

15:00

9

Downstream

Group

Round

2.1

9.4

8

3.9

13.0

Unknown

Unknown

-

0.12

-

-

-

3.4

0.2

39

9

AR

5/12/1990

14:00

4

Upstream

Unknown

Sharp

2.1

0.0

0

2.9

10.8

Unknown

Unknown

-

0.18

-

-

-

4.4

0.2

40

9

AR

5/12/1990

14:00

5

Upstream

Unknown

Sharp

2.0

0.0

0

0.7

8.1

Unknown

Unknown

-

0.18

-

-

-

2.7

0.2

41

10

AR

5/14/1990

14:00

7

Downstream

Group

Round

3.0

10.9

0

1.9

11.7

Unknown

Unknown

-

0.32

-

-

-

4.4

0.2

42

10

AR

5/14/1990

14:00

8

Downstream

Group

Square

3.0

10.9

14

2.3

13.5

Unknown

Unknown

-

0.32

-

-

-

1.8

0.2

43

10

AR

5/14/1990

14:00

10

Downstream

Group

Round

3.0

10.9

0

1.5

9.1

Unknown

Unknown

-

0.32

-

-

-

3.3

0.2

44

13

CO

5/23/1984

9:00

1

Upstream

Single

Round

1.2

6.4

12

1.0

2.1

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.6

0.2

45

13

CO

5/23/1984

10:30

1

Downstream

Single

Round

1.2

6.4

12

1.0

2.1

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.4

0.2

46

13

CO

6/5/1984

14:00

1

Upstream

Single

Round

1.2

6.4

0

1.6

2.3

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

1.3

0.3

47

13

CO

6/5/1984

15:00

1

Downstream

Single

Round

1.2

6.4

0

1.6

2.3

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.5

0.2

48

13

CO

9/27/1984

10:00

1

Upstream

Single

Round

1.2

6.4

19

0.8

0.7

Unknown

Noncohesive

0.34

0.64

1.19

2.87

1.9

0.6

0.2

49

13

CO

9/27/1984

11:00

1

Downstream

Single

Round

1.2

6.4

19

0.8

0.7

Unknown

Noncohesive

0.34

0.64

1.19

2.87

1.9

0.4

0.2

50

13

CO

5/23/1984

9:00

3

Upstream

Single

Round

1.2

6.4

0

0.7

0.6

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.3

0.2

51

13

CO

5/23/1984

10:30

3

Downstream

Single

Round

1.2

6.4

0

0.7

0.6

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.3

0.2

52

13

CO

6/5/1984

14:00

3

Upstream

Single

Round

1.2

6.4

0

1.0

1.0

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.3

0.2

53

13

CO

6/5/1984

15:00

3

Downstream

Single

Round

1.2

6.4

0

1.0

1.0

Unknown

Noncohesive

0.40

1.19

5.15

10.70

3.6

0.3

0.2

54

14

CO

5/22/1984

12:00

1

Upstream

Single

Sharp

0.9

27.4

26

1.6

1.2

Unknown

Noncohesive

8.81

29.80

68.90

80.80

3.0

0.5

0.2

55

14

CO

5/22/1984

14:00

1

Downstream

Single

Sharp

0.9

27.4

26

1.6

1.2

Unknown

Noncohesive

8.81

29.80

68.90

80.80

3.0

0.5

0.2

56

14

CO

9/25/1984

8:00

1

Upstream

Single

Sharp

0.9

27.4

36

1.1

0.3

Unknown

Noncohesive

8.81

29.80

68.90

80.80

3.0

0.3

0.2

57

11

CO

5/21/1984

10:00

3

Upstream

Single

Sharp

0.5

7.1

20

1.4

1.8

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.3

0.2

58

11

CO

5/21/1984

13:00

3

Downstream

Single

Sharp

0.5

7.1

20

1.4

1.8

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.7

0.2

59

11

CO

5/21/1984

10:00

4

Upstream

Single

Sharp

0.5

7.1

20

1.8

1.6

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.3

0.2

60

11

CO

5/21/1984

13:00

4

Downstream

Single

Sharp

0.5

7.1

20

1.8

1.6

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.8

0.2

61

11

CO

6/26/1984

14:00

4

Upstream

Single

Sharp

0.5

7.1

43

1.0

1.4

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.5

0.2

62

11

CO

6/26/1984

16:00

4

Downstream

Single

Sharp

0.5

7.1

43

1.0

1.4

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.7

0.2

63

11

CO

10/3/1984

8:00

4

Upstream

Single

Sharp

0.5

7.1

0

0.6

0.6

Substantial

Noncohesive

0.43

1.80

7.86

14.80

4.3

0.5

0.2

64

11

CO

10/3/1984

10:00

4

Downstream

Single

Sharp

0.5

7.1

0

0.6

0.6

Substantial

Noncohesive

0.43

1.80

7.86

14.80

4.3

0.7

0.2

65

11

CO

5/21/1984

13:00

5

Downstream

Single

Sharp

0.5

7.1

20

1.4

1.3

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.9

0.2

66

11

CO

6/26/1984

16:00

5

Downstream

Single

Sharp

0.5

7.1

43

1.0

1.0

Unknown

Noncohesive

0.43

1.10

5.12

10.40

3.5

0.5

0.2

67

11

CO

10/3/1984

10:00

5

Downstream

Single

Sharp

0.5

7.1

43

0.8

0.7

Unknown

Noncohesive

0.43

1.80

7.86

14.80

4.3

0.4

0.2

68

12

CO

5/18/1984

11:00

1

Upstream

Single

Square

0.3

7.3

26

0.8

1.0

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.6

0.2

69

12

CO

5/18/1984

13:30

1

Downstream

Single

Square

0.3

7.3

26

0.8

1.0

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.6

0.2

70

12

CO

6/25/1984

14:00

1

Upstream

Single

Square

0.3

7.3

15

0.7

0.6

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.2

0.2

Table 24. Pier scour observations, continued.

Measurement

Site

State

Date

Time

Pier

Upstream/ Downstream

Pier Type

Pier Shape

Pier Width (m)

Pier Length (m)

Skew (deg)

Velocity (m/s)

Depth (m)

Debris Effects

Bed Material

D16 (mm)

D50 (mm)

D84 (mm)

D95 (mm)

Gradation

Scour Depth (m)

Accuracy (m)

71

12

CO

6/25/1984

16:30

1

Downstream

Single

Square

0.3

7.3

15

0.7

0.6

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

72

12

CO

10/2/1984

14:00

1

Upstream

Single

Square

0.3

7.3

15

0.7

0.2

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.5

0.2

73

12

CO

10/2/1984

16:00

1

Downstream

Single

Square

0.3

7.3

15

0.7

0.2

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.0

0.2

74

12

CO

5/18/1984

11:00

2

Upstream

Single

Square

0.3

7.3

26

1.1

1.0

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.2

0.2

75

12

CO

5/18/1984

13:00

2

Downstream

Single

Square

0.3

7.3

26

1.1

1.0

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.5

0.2

76

12

CO

5/18/1984

11:00

3

Upstream

Single

Square

0.3

7.3

14

1.2

1.0

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.3

0.2

77

12

CO

5/18/1984

13:30

3

Downstream

Single

Square

0.3

7.3

14

1.2

1.0

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.3

0.2

78

12

CO

6/25/1984

14:00

3

Upstream

Single

Square

0.3

7.3

20

0.8

0.3

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.3

0.2

79

12

CO

6/25/1984

16:30

3

Downstream

Single

Square

0.3

7.3

20

0.8

0.3

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.0

0.2

80

12

CO

5/18/1984

11:00

4

Upstream

Single

Square

0.3

7.3

23

1.2

1.3

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.2

0.2

81

12

CO

5/18/1984

13:30

4

Downstream

Single

Square

0.3

7.3

23

1.2

1.3

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.3

0.2

82

12

CO

6/25/1984

14:00

4

Upstream

Single

Square

0.3

7.3

16

1.0

0.3

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

83

12

CO

6/25/1984

16:30

4

Downstream

Single

Square

0.3

7.3

16

1.0

0.3

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.2

0.2

84

12

CO

10/2/1984

14:00

4

Upstream

Single

Square

0.3

7.3

16

0.7

1.0

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.4

0.2

85

12

CO

5/18/1984

11:00

5

Upstream

Single

Square

0.3

7.3

16

1.2

1.9

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.6

0.2

86

12

CO

5/18/1984

13:30

5

Downstream

Single

Square

0.3

7.3

16

1.2

1.9

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.5

0.2

87

12

CO

6/25/1984

14:00

5

Upstream

Single

Square

0.3

7.3

11

1.1

0.4

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.5

0.2

88

12

CO

6/25/1984

16:30

5

Downstream

Single

Square

0.3

7.3

11

1.1

0.4

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

89

12

CO

10/2/1984

14:00

5

Upstream

Single

Square

0.3

7.3

11

1.1

0.9

Unknown

Noncohesive

0.40

0.94

3.51

6.98

2.6

0.5

0.2

90

12

CO

10/2/1984

16:00

5

Downstream

Single

Square

0.3

7.3

11

1.1

0.9

Unknown

Noncohesive

0.40

0.94

3.51

6.98

2.6

0.5

0.2

91

12

CO

5/18/1984

11:00

6

Upstream

Single

Square

0.3

7.3

16

1.2

2.7

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.7

0.2

92

12

CO

5/18/1984

13:30

6

Downstream

Single

Square

0.3

7.3

16

1.2

2.7

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.8

0.2

93

12

CO

6/25/1984

14:00

6

Upstream

Single

Square

0.3

7.3

8

1.1

0.5

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.5

0.2

94

12

CO

6/25/1984

16:30

6

Downstream

Single

Square

0.3

7.3

8

1.1

0.5

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

95

12

CO

10/2/1984

14:00

6

Upstream

Single

Square

0.3

7.3

8

1.1

0.6

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.6

0.2

96

12

CO

10/2/1984

16:00

6

Downstream

Single

Square

0.3

7.3

8

1.1

0.6

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.6

0.2

97

12

CO

5/18/1984

11:00

7

Upstream

Single

Square

0.3

7.3

14

1.6

2.8

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

98

12

CO

5/18/1984

13:30

7

Downstream

Single

Square

0.3

7.3

14

1.6

2.8

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

99

12

CO

6/25/1984

14:00

7

Upstream

Single

Square

0.3

7.3

13

1.1

0.7

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.5

0.2

100

12

CO

6/25/1984

16:30

7

Downstream

Single

Square

0.3

7.3

13

1.1

0.7

Unknown

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.4

0.2

101

12

CO

10/2/1984

14:00

7

Upstream

Single

Square

0.3

7.3

13

0.7

0.7

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.6

0.2

102

12

CO

10/2/1984

16:00

7

Downstream

Single

Square

0.3

7.3

13

0.7

0.7

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.9

0.2

103

12

CO

5/18/1984

11:00

8

Upstream

Single

Square

0.3

7.3

11

1.3

2.9

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.2

0.2

104

12

CO

5/18/1984

13:30

8

Downstream

Single

Square

0.3

7.3

11

1.3

2.9

Substantial

Noncohesive

0.40

0.94

3.51

6.98

3.0

0.6

0.2

105

12

CO

10/2/1984

14:00

8

Upstream

Single

Square

0.3

7.3

11

0.7

0.8

Insignificant

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.2

0.2

Table 24. Pier scour observations, continued.

Measurement

Site

State

Date

Time

Pier

Upstream/ Downstream

Pier Type

Pier Shape

Pier Width (m)

Pier Length (m)

Skew (deg)

Velocity (m/s)

Depth (m)

Debris Effects

Bed Material

D16 (mm)

D50 (mm)

D84 (mm)

D95 (mm)

Gradation

Scour Depth (m)

Accuracy (m)

106

12

CO

10/2/1984

16:00

8

Downstream

Single

Square

0.3

7.3

11

0.7

0.8

Unknown

Noncohesive

0.30

0.67

2.10

9.30

2.6

0.3

0.2

107

16

DE

9/24/1991

14:00

C

Upstream

Group

Cylindrical

0.8

13.1

0

0.3

3.2

Unknown

Unknown

0.09

0.18

0.37

0.65

2.0

0.7

0.3

108

16

DE

6/8/1992

9:00

C

Upstream

Group

Cylindrical

0.8

13.1

0

0.3

3.1

Unknown

Unknown

0.09

0.18

0.37

0.65

2.0

0.5

0.3

109

16

DE

6/8/1992

10:30

C

Upstream

Group

Cylindrical

0.8

13.1

0

0.3

3.1

Unknown

Unknown

0.09

0.18

0.37

0.65

2.0

0.3

0.3

110

16

DE

9/24/1991

14:00

E

Upstream

Group

Cylindrical

0.8

13.1

0

0.3

8.0

Unknown

Unknown

0.09

0.18

0.37

0.65

2.0

1.6

0.3

111

16

DE

6/8/1992

9:00

E

Upstream

Group

Cylindrical

0.8

13.1

0

0.5

7.8

Unknown

Unknown

0.09

0.18

0.37

0.65

2.0

1.4

0.3

112

16

DE

6/8/1992

10:30

E

Upstream

Group

Cylindrical

0.8

13.1

0

0.5

7.8

Unknown

Unknown

0.09

0.18

0.37

0.65

2.0

1.4

0.3

113

16

DE

9/24/1991

14:00

F

Upstream

Group

Cylindrical

0.8

13.1

0

0.4

7.1

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

0.5

0.3

114

16

DE

6/8/1992

9:00

F

Upstream

Group

Cylindrical

0.8

13.1

0

0.5

7.6

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

1.2

0.3

115

16

DE

6/8/1992

10:30

F

Upstream

Group

Cylindrical

0.8

13.1

0

0.5

7.6

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

1.2

0.3

116

16

DE

9/24/1991

14:00

G

Upstream

Group

Cylindrical

0.8

13.1

0

0.3

3.8

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

0.4

0.3

117

16

DE

6/8/1992

10:30

G

Upstream

Group

Cylindrical

0.8

13.1

0

0.3

3.7

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

0.2

0.3

118

16

DE

6/8/1992

9:00

H

Upstream

Group

Cylindrical

0.8

13.1

0

0.2

1.5

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

0.5

0.3

119

16

DE

6/8/1992

10:30

H

Upstream

Group

Cylindrical

0.8

13.1

0

0.2

1.5

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

0.5

0.3

120

16

DE

6/8/1992

9:00

I

Upstream

Group

Cylindrical

0.8

13.1

0

0.2

0.3

Unknown

Unknown

0.06

0.18

0.37

0.65

2.0

0.2

0.3

121

15

DE

11/28/1988

16:00

C2

Upstream

Group

Square

0.4

8.2

0

0.6

4.7

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

122

15

DE

11/15/1990

13:30

C2

Upstream

Group

Square

0.4

8.2

0

0.7

5.3

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

123

15

DE

12/2/1990

13:00

C2

Upstream

Group

Square

0.4

8.2

0

0.4

4.8

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.3

0.3

124

15

DE

12/2/1990

14:00

C2

Upstream

Group

Square

0.4

8.2

0

0.7

4.2

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

125

15

DE

12/4/1990

15:00

C2

Upstream

Group

Square

0.4

8.2

0

0.4

4.7

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.3

0.3

126

15

DE

10/7/1991

13:00

C2

Upstream

Group

Square

0.4

8.2

0

0.5

4.6

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

127

15

DE

6/10/1992

9:30

C2

Upstream

Group

Square

0.4

8.2

0

0.5

4.6

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

128

15

DE

6/10/1992

10:30

C2

Upstream

Group

Square

0.4

8.2

0

0.5

4.2

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

129

15

DE

6/10/1992

11:30

C2

Upstream

Group

Square

0.4

8.2

0

0.5

3.7

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.2

0.3

130

15

DE

11/15/1990

13:30

C3

Upstream

Group

Square

0.4

8.2

0

0.5

4.0

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.1

0.3

131

15

DE

6/10/1992

10:30

C3

Upstream

Group

Square

0.4

8.2

0

0.5

4.9

Unknown

Unknown

0.06

0.40

1.40

8.00

5.1

0.3

0.3

132

17

GA

2/12/1990

14:45

11

Upstream

Group

Square

1.2

9.9

0

0.6

5.7

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

2.1

0.1

133

17

GA

2/12/1990

17:05

11

Upstream

Group

Square

1.2

9.9

0

0.5

5.5

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

2.0

0.1

134

17

GA

2/12/1990

13:00

12

Upstream

Group

Square

1.2

10.8

0

0.5

7.1

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

1.2

0.1

135

17

GA

2/12/1990

14:45

12

Upstream

Group

Square

1.2

10.8

0

0.7

6.4

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

1.4

0.1

136

17

GA

2/12/1990

17:05

12

Upstream

Group

Square

1.2

10.8

0

0.7

6.2

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

1.7

0.1

137

17

GA

2/12/1990

13:00

13

Upstream

Group

Square

1.8

10.8

0

0.5

8.0

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

1.2

0.1

138

17

GA

2/12/1990

14:45

13

Upstream

Group

Square

1.8

10.8

0

0.7

7.6

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

1.5

0.1

139

17

GA

2/12/1990

17:05

13

Upstream

Group

Square

1.8

10.8

0

0.7

7.0

Insignificant

Noncohesive

0.55

1.00

2.45

4.10

2.1

1.6

0.1

140

57

IL

8/3/1993

-

11

Upstream

Single

Square

4.0

11.6

11

2.4

22.5

Insignificant

Noncohesive

0.30

0.60

1.30

4.20

2.1

7.1

0.6

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). The hydraulics and hydrology research program at the TFHRC Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
FHWA
United States Department of Transportation - Federal Highway Administration