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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 24. Pier scour observations, continued.

Meaurement

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)

Grad-ation

Scour Depth (m)

Ac-curacy (m)

141

57

IL

8/12/1993

11

Upstream

Single

Square

4.1

11.6

4

2.0

22.4

Insignificant

Noncohesive

0.30

0.60

1.30

4.20

2.1

6.2

0.6

142

57

IL

9/13/1993

11

Upstream

Single

Square

4.7

11.6

4

1.8

16.7

Insignificant

Noncohesive

0.30

0.60

1.30

4.20

2.1

6.5

0.6

143

18

IN

11/13/1992

12:30

1

Downstream

Single

Round

0.9

10.2

0

0.3

5.1

Unknown

Noncohesive

0.25

0.50

2.25

8.00

3.0

0.4

0.2

144

18

IN

11/13/1992

10:30

2

Upstream

Single

Round

0.9

10.2

0

0.8

5.9

Unknown

Noncohesive

0.25

0.50

2.25

8.00

3.0

1.0

0.2

145

19

IN

1/3/1991

11:00

8

Upstream

Single

Round

0.9

10.5

5

1.6

9.4

Unknown

Noncohesive

0.24

0.34

0.34

0.55

1.4

0.7

0.2

146

19

IN

1/3/1991

11:45

8

Downstream

Single

Round

0.9

10.5

5

1.6

9.4

Unknown

Noncohesive

0.24

0.34

0.34

0.55

1.4

0.5

0.2

147

20

IN

1/3/1991

12:30

2

Upstream

Single

Round

0.9

14.5

5

1.1

3.4

Unknown

Noncohesive

0.24

0.90

4.20

7.00

4.2

0.4

0.2

148

20

IN

1/4/1991

12:00

2

Upstream

Single

Round

0.9

14.5

5

1.0

3.2

Unknown

Noncohesive

0.24

0.90

4.20

7.00

4.2

0.4

0.2

149

20

IN

1/4/1991

13:00

2

Downstream

Single

Round

0.9

14.5

5

1.0

3.2

Unknown

Noncohesive

0.24

0.90

4.20

7.00

4.2

0.2

0.2

150

20

IN

1/3/1991

12:30

3

Upstream

Single

Round

0.9

13.1

0

1.3

5.1

Unknown

Noncohesive

0.24

0.90

4.20

7.00

4.2

0.7

0.2

151

20

IN

1/3/1991

12:30

4

Upstream

Single

Round

0.6

12.8

10

1.6

6.6

Unknown

Noncohesive

0.24

0.90

4.20

7.00

4.2

1.1

0.2

152

20

IN

1/4/1991

12:00

4

Upstream

Single

Round

0.6

12.8

10

1.9

6.2

Unknown

Noncohesive

0.24

0.90

4.20

7.00

4.2

1.2

0.2

153

21

LA

5/19/1990

14:20

4

Upstream

Single

Sharp

4.3

16.5

0

2.6

11.6

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

3.7

0.6

154

21

LA

5/19/1990

15:30

4

Downstream

Single

Sharp

4.3

16.5

0

2.6

12.3

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

0.9

0.3

155

21

LA

5/22/1990

13:35

4

Upstream

Single

Sharp

4.3

16.5

0

2.1

9.4

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

3.5

0.3

156

21

LA

5/22/1990

14:45

4

Downstream

Single

Sharp

4.3

16.5

0

2.1

9.4

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

1.1

0.3

157

21

LA

5/19/1990

14:20

5

Upstream

Single

Sharp

4.3

16.5

0

3.2

11.9

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

7.0

0.6

158

21

LA

5/19/1990

15:30

5

Downstream

Single

Sharp

4.3

16.5

0

3.2

12.6

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

5.2

0.6

159

21

LA

5/22/1990

13:35

5

Upstream

Single

Sharp

4.3

16.5

0

2.9

9.8

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

7.7

0.3

160

21

LA

5/22/1990

14:45

5

Downstream

Single

Sharp

4.3

16.5

0

2.9

9.8

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

5.6

0.3

161

22

LA

5/17/1990

13:30

4

Upstream

Single

Round

4.3

12.2

0

2.5

11.7

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

4.4

0.3

162

22

LA

5/17/1990

15:10

4

Downstream

Single

Round

4.3

12.2

0

2.5

11.7

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

3.9

0.6

163

22

LA

5/19/1990

10:25

4

Upstream

Single

Round

4.3

12.2

0

2.6

10.8

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

3.3

0.6

164

22

LA

5/19/1990

12:55

4

Downstream

Single

Round

4.3

12.2

0

2.6

11.3

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

2.1

0.3

165

22

LA

5/22/1990

8:55

4

Downstream

Single

Round

4.3

12.2

0

2.1

9.3

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

4.2

0.3

166

22

LA

5/22/1990

10:30

4

Upstream

Single

Round

4.3

12.2

0

2.1

9.3

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

3.8

0.3

167

22

LA

5/17/1990

13:30

5

Upstream

Single

Round

4.3

12.2

0

3.0

12.0

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

4.5

0.3

168

22

LA

5/17/1990

15:10

5

Downstream

Single

Round

4.3

12.2

0

3.0

11.7

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

4.8

0.6

169

22

LA

5/19/1990

10:25

5

Upstream

Single

Round

4.3

12.2

0

3.2

11.2

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

5.5

0.3

170

22

LA

5/19/1990

12:55

5

Downstream

Single

Round

4.3

12.2

0

3.2

11.7

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

5.2

0.3

171

22

LA

5/22/1990

8:55

5

Downstream

Single

Round

4.3

12.2

0

2.9

9.6

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

5.6

0.6

172

22

LA

5/22/1990

10:30

5

Upstream

Single

Round

4.3

12.2

0

2.9

9.7

Insignificant

Noncohesive

0.20

0.30

0.40

0.50

1.4

3.7

0.3

173

24

MD

6/23/1972

17:30

1

Upstream

Single

Round

1.2

9.8

0

0.8

3.5

Unknown

Unknown

13.00

22.00

76.00

160.00

2.4

0.4

0.3

174

24

MD

9/25/1975

19:00

1

Upstream

Single

Round

1.2

9.8

0

1.3

3.1

Unknown

Unknown

13.00

22.00

76.00

160.00

2.4

0.4

0.3

175

24

MD

6/23/1972

17:30

2

Upstream

Single

Round

1.2

9.8

0

1.1

2.4

Unknown

Unknown

13.00

22.00

76.00

160.00

2.4

0.7

0.3

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)

Grad-ation

Scour Depth (m)

Ac-curacy (m)

176 24 MD 9/25/1975 19:00 2 Upstream Single Round 1.2 9.8 0 1.6 2.4 Unknown Uknown 13.00 22.00 76.00 160.00 2.4 0.5 0.3
177 24 MD 5/29/1990 20:30 2 Upstream Single Round 1.2 9.8 0 1.0 1.9 Unknown Uknown 13.00 22.00 76.00 160.00 2.4 0.3 0.3

178

24

MD

10/23/1990

15:30

2

Upstream

Single

Round

1.2

9.8

0

1.6

2.0

Unknown

Unknown

13.00

22.00

76.00

160.00

2.4

0.4

0.3

179

24

MD

10/23/1990

20:00 2 Upstream Single Round 1.2 9.8 0 1.6 3.1 Unknown Unknown 13.00 22.00 76.00 160.00 2.4 0.5 0.3
180 25 MD 2/23/1989 11:00 CNTR Upstream Single Square 1.2 10.7 0 0.1 1.1 Unknown Unknown 0.18 0.38 0.94 2.60 2.3 0.7 0.3

181

25

MD

3/25/1989

14:00

CNTR

Upstream

Single

Square

1.2

10.7

0

0.4

2.2

Unknown

Unknown

0.18

0.38

0.94

2.60

2.3

0.7

0.3

182

25

MD

7/28/1991

10:30

CNTR

Upstream

Single

Square

1.2

10.7

0

0.2

1.5

Unknown

Unknown

0.18

0.38

0.94

2.60

2.3

0.6

0.3

183

25

MD

2/23/1989

11:00

LEFT

Upstream

Single

Square

1.2

10.7

0

0.7

1.9

Unknown

Noncohesive

0.18

0.38

0.94

2.60

2.3

1.2

0.3

184

25

MD

3/25/1989

14:00

LEFT

Upstream

Single

Square

1.2

10.7

0

0.8

3.1

Unknown

Noncohesive

0.18

0.38

0.94

2.60

2.3

1.6

0.3

185

25

MD

7/28/1991

10:30

LEFT

Upstream

Single

Square

1.2

10.7

0

0.8

2.2

Unknown

Unknown

0.18

0.38

0.94

2.60

2.3

1.3

0.3

186

25

MD

2/23/1989

11:00

RT

Upstream

Single

Square

1.2

10.7

0

0.3

1.1

Unknown

Unknown

0.18

0.38

0.94

2.60

2.3

0.5

0.3

187

25

MD

2/23/1989

14:00

RT

Upstream

Single

Square

1.2

10.7

0

0.6

2.1

Unknown

Unknown

0.18

0.38

0.94

2.60

2.3

0.7

0.3

188

25

MD

7/28/1991

10:30

RT

Upstream

Single

Square

1.2

10.7

0

0.3

1.5

Unknown

Unknown

0.18

0.38

0.94

2.60

2.3

0.7

0.3

189

23

MD

7/13/1990

13:00

LEFT

Upstream

Single

Sharp

1.5

12.7

0

2.3

2.4

Unknown

Unknown

68.00

108.00

233.00

350.00

1.8

0.3

0.3

190

23

MD

4/1/1993

9:30

LEFT

Upstream

Single

Sharp

1.5

12.7

0

2.1

2.1

Unknown

Unknown

68.00

108.00

233.00

350.00

1.8

0.4

0.3

191

23

MD

7/13/1990

13:00

RT

Upstream

Single

Sharp

1.5

12.7

0

2.6

3.0

Unknown

Unknown

68.00

108.00

233.00

350.00

1.8

0.8

0.3

192

23

MD

4/1/1993

9:30

RT

Upstream

Single

Sharp

1.5

12.7

0

1.9

2.4

Unknown

Unknown

68.00

108.00

233.00

350.00

1.8

0.5

0.3

193

58

MN

3/28/1969

14:30

9

Upstream

Single

Square

5.0

9.8

0

0.7

5.9

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

21.8

0.9

0.0

194

58

MN

4/3/1969

11:57

9

Upstream

Single

Square

4.8

9.8

0

0.8

6.5

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.9

0.1

195

58

MN

4/9/1969

11:52

9

Upstream

Single

Square

4.5

9.8

0

1.2

8.5

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.8

0.1

196

58

MN

4/15/1969

12:40

9

Upstream

Single

Square

5.3

9.8

0

1.6

11.8

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

4.6

0.2

197

58

MN

4/23/1969

11:37

9

Upstream

Single

Square

5.4

9.8

0

1.4

9.5

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

4.2

0.2

198

58

MN

4/28/1969

12:15

9

Upstream

Single

Square

5.5

9.8

0

1.1

8.7

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

3.1

0.1

199

58

MN

6/4/1969

13:55

9

Upstream

Single

Square

5.1

9.8

0

0.5

5.7

Unknown

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.7

0.0

200

58

MN

3/28/1969

14:30

10

Upstream

Single

Square

3.3

9.8

0

0.7

4.3

Insignificant

Noncohesive

0.20

0.48

6.70

1.10

1.8

0.5

0.0

201

58

MN

4/3/1969

11:57

10

Upstream

Single

Square

3.3

9.8

0

0.8

4.8

Insignificant

Noncohesive

0.20

0.48

6.70

1.10

1.8

0.4

0.0

202

58

MN

4/9/1969

11:52

10

Upstream

Single

Square

3.3

9.8

0

1.2

6.7

Insignificant

Noncohesive

0.20

0.48

6.70

1.10

1.8

0.9

0.0

203

58

MN

4/15/1969

12:40

10

Upstream

Single

Square

3.1

9.8

0

1.6

9.8

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.7

0.0

204

58

MN

4/23/1969

11:37

10

Upstream

Single

Square

3.7

9.8

0

1.4

9.8

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.8

0.0

205

58

MN

4/28/1969

12:15

10

Upstream

Single

Square

3.7

9.8

0

1.1

7.9

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.4

0.0

206

58

MN

6/4/1969

13:35

10

Upstream

Single

Square

4.1

9.8

0

0.5

4.7

Insignificant

Noncohesive

0.20

0.48

0.67

1.10

1.8

0.5

0.0

207

75

MO

7/14/1993

8

Upstream

Single

Square

2.8

9.0

0

0.0

12.6

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

3.7

0.9

208

75

MO

7/17/1993

8

Upstream

Single

Square

2.8

9.0

0

1.9

14.3

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

4.3

0.6

209

75

MO

7/19/1993

8

Upstream

Single

Square

2.8

9.0

0

2.0

15.1

Insignificant

Unknown

0.28

0.70

2.10

4.60

2.7

3.8

0.6

210

75

MO

8/17/1993

8

Upstream

Single

Square

2.8

9.0

0

1.2

12.9

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

3.8

0.6

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)

211

75

MO

9/16/1993

8

Upstream

Single

Square

2.8

9.0

0

1.1

11.0

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

4.3

0.6

212

75

MO

7/14/1993

9

Upstream

Single

Square

2.9

9.0

0

0.0

13.3

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

4.0

0.9

213

75

MO

7/17/1993

9

Upstream

Single

Square

2.9

9.0

0

2.3

14.6

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

4.0

0.6

214

75

MO

7/19/1993

9

Upstream

Single

Square

2.9

9.0

0

2.0

15.4

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

3.7

0.6

215

75

MO

8/17/1993

9

Upstream

Single

Square

2.9

9.0

0

1.4

12.9

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

3.7

0.6

216

75

MO

9/16/1993

9

Upstream

Single

Square

2.9

9.0

0

1.2

11.0

Insignificant

Noncohesive

0.28

0.70

2.10

4.60

2.7

3.7

0.6

217

76

MO

7/15/1993

10

Upstream

Single

Sharp

5.5

20.7

0

2.6

20.0

Insignificant

Noncohesive

0.55

0.96

2.50

4.03

2.1

4.1

0.6

218

28

MS

1/25/1990

9:00

3

Upstream

Single

Cylindrical

2.4

2.4

0

1.9

3.0

Insignificant

Noncohesive

0.49

7.51

23.20

27.00

6.9

1.2

0.3

219

28

MS

8/27/1992

10:10

3

Downstream

Single

Cylindrical

2.4

2.4

0

1.9

2.6

Substantial

Noncohesive

0.49

7.51

23.20

27.00

6.9

1.0

0.3

220

28

MS

12/21/1972

6:00

4

Upstream

Single

Cylindrical

2.4

2.4

0

2.1

3.9

Unknown

Noncohesive

0.49

7.51

23.20

27.00

6.9

0.9

0.2

221

28

MS

4/25/1973

5:30

4

Upstream

Single

Cylindrical

2.4

2.4

0

1.9

2.7

Unknown

Noncohesive

0.49

7.51

23.20

27.00

6.9

0.9

0.2

222

28

MS

1/25/1990

9:00

4

Upstream

Single

Cylindrical

2.4

2.4

0

2.1

2.9

Insignificant

Noncohesive

0.49

7.51

23.20

27.00

6.9

1.2

0.3

223

28

MS

8/27/1992

11:10

4

Upstream

Single

Cylindrical

2.4

2.4

0

2.3

2.7

Insignificant

Noncohesive

0.49

7.51

23.20

27.00

6.9

2.0

0.3

224

28

MS

1/25/1990

9:00

5

Upstream

Single

Cylindrical

2.4

2.4

0

1.7

3.0

Insignificant

Noncohesive

0.49

7.51

23.20

27.00

6.9

1.4

0.3

225

28

MS

8/27/1992

10:55

5

Upstream

Single

Cylindrical

2.4

2.4

0

2.0

3.1

Insignificant

Noncohesive

0.49

7.51

23.20

27.00

6.9

1.4

0.3

226

26

MS

2/25/1991

14:30

12L

Upstream

Group

Square

0.4

8.0

28

0.8

2.9

Insignificant

Cohesive

0.6

0.2

227

26

MS

5/1/1991

10:00

12L

Downstream

Group

Square

0.4

8.0

23

0.8

5.1

Insignificant

Cohesive

0.8

0.2

228

26

MS

2/25/1991

14:30

14L

Upstream

Group

Square

0.4

8.0

18

1.0

7.3

Insignificant

Cohesive

0.0

0.2

229

26

MS

5/1/1991

10:00

14L

Upstream

Group

Square

0.4

8.0

16

1.3

6.4

Insignificant

Cohesive

0.0

0.2

230

26

MS

2/25/1991

14:30

15L

Upstream

Group

Square

0.4

8.0

16

1.2

8.9

Insignificant

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.4

0.2

231

26

MS

5/1/1991

10:00

15L

Downstream

Group

Square

0.4

8.0

14

1.3

8.8

Insignificant

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.9

0.2

232

26

MS

2/25/1991

14:30

16L

Upstream

Group

Square

0.8

8.0

16

1.2

8.8

Insignificant

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.4

0.2

233

26

MS

5/1/1991

10:00

16L

Upstream

Group

Square

0.8

8.0

8

1.4

8.2

Moderate

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.4

0.2

234

26

MS

1/31/1990

15:00

17L

Upstream

Group

Cylindrical

1.8

6.2

11

0.9

5.3

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

0.6

0.2

235

26

MS

2/25/1991

14:30

17L

Upstream

Group

Cylindrical

1.6

6.2

16

1.0

6.7

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

1.1

0.2

236

26

MS

5/1/1991

10:00

17L

Upstream

Group

Cylindrical

1.4

6.2

11

1.1

6.5

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

1.2

0.2

237

26

MS

1/31/1990

15:00

18L

Upstream

Group

Cylindrical

1.8

6.2

11

0.4

5.3

Moderate

Noncohesive

0.26

0.39

0.90

1.30

1.9

0.5

0.2

238

26

MS

2/25/1991

14:30

18L

Upstream

Group

Cylindrical

1.6

6.2

16

0.6

6.4

Moderate

Noncohesive

0.26

0.39

0.90

1.30

1.9

0.6

0.2

239

26

MS

5/1/1991

10:00

18L

Downstream

Group

Cylindrical

1.5

6.2

14

0.7

6.8

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

0.8

0.2

240

27

MS

5/1/1991

11:20

15R

Upstream

Group

Square

0.4

8.0

16

1.6

9.3

Insignificant

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.4

0.2

241

27

MS

2/25/1991

15:20

16R

Upstream

Group

Square

0.8

8.0

16

1.2

8.4

Insignificant

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.9

0.2

242

27

MS

5/1/1991

11:20

16R

Downstream

Group

Square

0.8

8.0

11

1.4

8.1

Insignificant

Noncohesive

0.36

0.54

1.20

2.90

1.8

0.6

0.2

243

27

MS

2/25/1991

15:20

17R

Upstream

Group

Cylindrical

1.7

6.2

16

0.9

7.1

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

0.5

0.2

244

27

MS

5/1/1991

11:20

17R

Upstream

Group

Cylindrical

1.5

6.2

8

1.0

6.6

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

1.2

0.2

245

27

MS

2/25/1991

15:20

18R

Upstream

Group

Cylindrical

1.6

6.2

20

0.7

6.2

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

1.7

0.2

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