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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)

246

27

MS

5/1/1991

11:20

18R

Upstream

Group

Cylindrical

1.6

6.2

14

0.6

7.0

Insignificant

Noncohesive

0.26

0.39

0.90

1.30

1.9

1.1

0.2

247

29

MS

1/30/1990

14:15

4

Downstream

Single

Square

1.6

8.2

14

2.1

6.8

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.5

0.2

248

29

MS

5/10/1991

14:45

4

Upstream

Single

Square

1.6

8.2

8

2.1

7.5

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

0.7

0.2

249

29

MS

1/30/1990

14:15

5

Upstream

Single

Square

1.9

8.2

8

2.0

8.6

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.6

0.2

250

29

MS

5/10/1991

14:45

5

Downstream

Single

Square

1.8

8.2

11

2.0

8.8

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.2

0.2

251

29

MS

1/30/1990

14:15

6

Upstream

Single

Square

1.7

8.1

0

1.1

8.0

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.7

0.3

252

29

MS

5/10/1991

14:45

6

Downstream

Single

Square

1.7

8.1

11

1.6

9.2

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

2.3

0.3

253

29

MS

1/30/1990

14:15

7

Upstream

Group

Square

1.2

7.0

0

0.6

7.0

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.2

0.2

254

29

MS

5/10/1991

14:45

7

Downstream

Group

Square

1.2

7.0

0

0.9

8.8

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

0.8

0.3

255

30

MS

1/27/1990

14:55

4

Upstream

Group

Cylindrical

1.6

6.4

8

1.6

8.2

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

0.6

0.2

256

30

MS

1/30/1990

15:00

4

Upstream

Group

Cylindrical

1.7

6.4

8

1.4

7.6

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.0

0.2

257

30

MS

5/10/1991

10:45

4

Upstream

Group

Cylindrical

1.7

6.4

11

1.6

8.9

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

0.4

0.2

258

30

MS

1/27/1990

12:30

5

Upstream

Group

Cylindrical

1.7

6.4

22

2.3

8.7

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

2.3

0.2

259

30

MS

1/30/1990

15:00

5

Upstream

Group

Cylindrical

2.0

6.4

8

1.7

8.7

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.0

0.2

260

30

MS

2/5/1990

17:35

5

Upstream

Group

Cylindrical

1.8

6.4

16

1.3

7.8

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

0.6

0.2

261

30

MS

5/10/1991

10:45

5

Downstream

Group

Cylindrical

1.7

6.4

11

2.0

8.8

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.4

0.2

262

30

MS

1/27/1990

14:55

6

Upstream

Group

Cylindrical

1.7

6.4

16

1.7

9.2

Insignificant

Noncohesive

0.39

6.90

15.00

20.00

6.2

1.5

0.2

263

30

MS

1/30/1990

15:00

6

Downstream

Group

Cylindrical

1.7

6.4

14

2.1

8.4

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

2.0

0.2

264

30

MS

2/5/1990

17:35

6

Downstream

Group

Cylindrical

1.8

6.4

18

1.3

7.7

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

2.0

0.2

265

30

MS

5/10/1991

10:45

6

Upstream

Group

Cylindrical

1.6

6.4

14

2.2

8.3

Unknown

Noncohesive

0.39

6.90

15.00

20.00

6.2

3.0

0.2

266

34

MT

5/21/1991

15:30

P1

Upstream

Single

Sharp

1.0

11.0

0

1.6

0.5

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

0.4

0.2

267

34

MT

6/4/1991

12:40

P1

Upstream

Single

Sharp

1.0

11.0

0

1.3

0.5

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

0.5

0.2

268

34

MT

6/21/1991

14:50

P1

Upstream

Single

Sharp

1.0

11.0

0

1.3

0.4

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

0.5

0.2

269

34

MT

5/21/1991

15:30

P3

Upstream

Single

Sharp

1.0

11.0

0

1.6

0.4

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

1.0

0.1

270

34

MT

6/4/1991

12:40

P3

Upstream

Single

Sharp

1.0

11.0

0

1.4

0.3

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

1.0

0.1

271

34

MT

6/21/1991

14:50

P3

Upstream

Single

Sharp

1.0

11.0

0

1.6

0.5

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

1.1

0.1

272

34

MT

5/21/1991

15:30

P4

Upstream

Single

Sharp

1.0

11.0

0

1.2

0.3

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

0.5

0.1

273

34

MT

6/4/1991

12:40

P4

Upstream

Single

Sharp

1.0

11.0

0

0.8

0.1

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

0.3

0.1

274

34

MT

6/21/1991

14:50

P4

Upstream

Single

Sharp

1.0

11.0

0

0.6

0.2

Moderate

Noncohesive

0.35

8.00

30.00

48.00

9.3

0.4

0.1

275

31

MT

6/6/1991

11:15

1

Upstream

Single

Sharp

1.3

15.2

5

2.5

2.6

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

1.1

0.1

276

31

MT

6/10/1991

12:30

1

Upstream

Single

Sharp

1.3

15.2

5

2.1

2.0

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

0.8

0.1

277

31

MT

6/13/1991

12:30

1

Upstream

Single

Sharp

1.3

15.2

5

2.1

2.3

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

0.8

0.1

278

31

MT

6/18/1991

12:45

1

Upstream

Single

Sharp

1.3

15.2

5

1.5

1.4

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

1.0

0.1

279

31

MT

6/6/1991

11:15

2

Upstream

Single

Sharp

1.3

15.2

5

2.0

2.2

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

0.8

0.1

280

31

MT

6/10/1991

12:30

2

Upstream

Single

Sharp

1.3

15.2

5

1.8

1.7

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

0.9

0.1

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)

281

31

MT

6/13/1991

12:30

2

Upstream

Single

Sharp

1.3

15.2

5

2.1

1.9

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

0.9

0.1

282

31

MT

6/18/1991

12:45

2

Upstream

Single

Sharp

1.3

15.2

5

1.1

1.2

Insignificant

Noncohesive

17.00

39.00

90.00

140.00

2.3

0.9

0.1

283

32

MT

6/6/1991

13:35

1

Upstream

Single

Sharp

1.0

12.0

3

2.6

1.5

Insignificant

Noncohesive

38.00

95.00

230.00

330.00

2.5

0.2

0.1

284

32

MT

6/18/1992

14:45

1

Upstream

Single

Sharp

1.0

12.0

3

1.6

1.0

Insignificant

Noncohesive

38.00

95.00

230.00

330.00

2.5

0.4

0.1

285

32

MT

6/23/1993

-

1

Upstream

Single

Sharp

1.0

12.0

3

1.9

1.0

Insignificant

Noncohesive

38.00

95.00

230.00

330.00

2.5

0.6

0.1

286

32

MT

6/6/1991

13:35

2

Upstream

Single

Sharp

1.0

12.0

3

3.2

1.7

Insignificant

Noncohesive

38.00

95.00

230.00

330.00

2.5

1.7

0.2

287

32

MT

6/18/1992

14:45

2

Upstream

Single

Sharp

1.0

12.0

3

2.1

1.1

Insignificant

Noncohesive

38.00

95.00

230.00

330.00

2.5

1.4

0.2

288

32

MT

6/23/1993

0:00

2

Upstream

Single

Sharp

1.0

12.0

3

2.1

1.2

Insignificant

Noncohesive

38.00

95.00

230.00

330.00

2.5

1.4

0.2

289

33

MT

5/21/1993

16:10

1

Upstream

Single

Sharp

0.9

10.4

0

2.4

2.7

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.8

0.2

290

33

MT

5/27/1993

10:00

1

Upstream

Single

Sharp

0.9

10.4

0

2.5

2.5

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.7

0.2

291

33

MT

6/30/1993

10:30

1

Upstream

Single

Sharp

0.9

10.4

0

1.5

2.0

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.6

0.2

292

33

MT

5/21/1993

16:10

2

Upstream

Single

Sharp

1.0

10.4

0

2.3

2.5

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.5

0.1

293

33

MT

5/27/1993

10:00

2

Upstream

Single

Sharp

0.9

10.4

0

2.4

2.4

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.5

0.1

294

33

MT

6/30/1993

10:30

2

Upstream

Single

Sharp

1.0

10.4

0

1.5

1.9

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.3

0.1

295

33

MT

5/21/1993

16:10

3

Upstream

Single

Sharp

0.9

10.4

0

1.0

2.3

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.1

0.1

296

33

MT

5/27/1993

10:00

3

Upstream

Single

Sharp

0.9

10.4

0

1.1

2.1

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.1

0.1

297

33

MT

6/30/1993

10:30

3

Upstream

Single

Sharp

0.9

10.4

0

1.1

1.8

Unknown

Noncohesive

28.00

73.00

150.00

190.00

2.3

0.1

0.1

298

36

NY

10/23/1970

-

1

Upstream

Single

Round

1.5

14.6

0

2.0

3.8

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.5

0.2

299

36

NY

6/24/1972

-

1

Upstream

Single

Round

1.5

14.6

0

4.1

8.3

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

1.6

0.2

300

36

NY

10/23/1970

-

2

Upstream

Single

Round

1.5

14.6

0

1.8

3.7

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.3

0.2

301

36

NY

6/24/1972

-

2

Upstream

Single

Round

1.5

14.6

0

3.9

9.5

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

1.2

0.2

302

36

NY

3/25/1980

-

2

Upstream

Single

Round

1.5

14.6

0

2.4

4.9

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.9

0.2

303

36

NY

10/23/1970

-

3

Upstream

Single

Round

1.5

14.6

0

1.5

3.4

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

0.2

304

36

NY

6/24/1972

-

3

Upstream

Single

Round

1.5

14.6

0

3.7

9.6

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

1.2

0.2

305

36

NY

9/28/1975

-

3

Upstream

Single

Round

1.5

14.6

0

3.2

5.8

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.7

0.2

306

36

NY

3/25/1980

-

3

Upstream

Single

Round

1.5

14.6

0

2.3

3.8

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

1.0

0.2

307

36

NY

10/23/1970

-

4

Upstream

Single

Round

1.5

14.6

0

1.0

2.4

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

0.2

308

36

NY

6/24/1972

-

4

Upstream

Single

Round

1.5

14.6

0

3.4

9.7

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

1.3

0.3

309

36

NY

9/28/1975

-

4

Upstream

Single

Round

1.5

14.6

0

2.9

5.7

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.6

0.2

310

36

NY

3/25/1980

-

4

Upstream

Single

Round

1.5

14.6

0

2.1

3.7

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

0.2

311

36

NY

10/23/1970

-

5

Upstream

Single

Round

1.5

14.6

0

0.8

2.0

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

0.2

312

36

NY

6/24/1972

-

5

Upstream

Single

Round

1.5

14.6

0

3.2

8.1

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

1.2

0.2

313

36

NY

9/28/1975

-

5

Upstream

Single

Round

1.5

14.6

0

2.7

5.4

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.6

0.2

314

36

NY

3/25/1980

-

5

Upstream

Single

Round

1.5

14.6

0

2.0

3.6

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

0.2

315

36

NY

10/23/1970

-

6

Upstream

Single

Round

1.5

14.6

0

0.5

1.7

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

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)

Grad-ation

Scour Depth (m)

Ac-curacy (m)

316

36

NY

6/24/1972

-

6

Upstream

Single

Round

1.5

14.6

0

2.7

5.8

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.6

0.2

317

36

NY

9/28/1975

-

6

Upstream

Single

Round

1.5

14.6

0

2.3

3.8

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.3

0.2

318

36

NY

3/25/1980

-

6

Upstream

Single

Round

1.5

14.6

0

1.6

2.6

Unknown

Noncohesive

11.00

27.00

58.00

106.00

2.3

0.0

0.2

319

40

NY

9/16/1992

-

1

Upstream

Single

Round

3.0

17.7

0

4.5

7.7

Unknown

Noncohesive

14.00

45.00

103.00

80.00

2.7

0.9

0.2

320

39

NY

10/21/1998

-

3

Upstream

Single

Sharp

1.8

6.7

0

2.9

6.4

Unknown

Noncohesive

18.00

27.00

42.00

80.00

1.5

1.0

0.2

321

35

NY

10/24/1990

-

1

Upstream

Single

Round

0.9

12.2

30

2.1

3.1

Insignificant

Noncohesive

18.00

32.00

55.00

80.00

1.8

1.6

0.1

322

37

NY

11/17/1989

-

1

Upstream

Single

Round

1.7

13.1

0

3.7

5.5

Insignificant

Noncohesive

15.00

33.00

60.00

103.00

2.0

0.6

0.1

323

37

NY

11/17/1989

-

2

Upstream

Single

Round

1.7

13.1

0

3.4

5.1

Insignificant

Noncohesive

15.00

33.00

60.00

103.00

2.0

1.1

0.1

324

38

NY

8/27/1991

-

2

Upstream

Single

Round

1.5

12.2

0

2.5

5.5

Unknown

Noncohesive

14.00

28.00

53.00

80.00

1.9

0.3

0.1

325

38

NY

8/27/1991

-

3

Upstream

Single

Round

1.5

12.2

0

2.7

5.6

Unknown

Noncohesive

14.00

28.00

53.00

80.00

1.9

0.3

0.1

326

38

NY

8/27/1991

-

4

Upstream

Single

Round

1.5

12.2

0

2.2

5.1

Moderate

Noncohesive

14.00

28.00

53.00

80.00

1.9

1.0

0.1

327

79

OH

7/13/1992

14:30

1

Upstream

Single

Round

0.8

9.4

40

0.5

3.2

Insignificant

Noncohesive

0.01

0.12

2.40

5.80

20.3

0.5

0.2

328

79

OH

7/17/1992

16:10

1

Upstream

Single

Round

0.8

9.4

50

0.3

2.2

Insignificant

Noncohesive

0.01

0.12

2.40

5.80

20.3

0.2

0.2

329

59

OH

1/28/1994

10:00

1

Upstream

Single

Round

1.2

9.4

0

1.1

3.2

Unknown

Noncohesive

0.03

0.15

0.28

0.35

2.9

0.9

0.2

330

60

OH

12/31/1992

11:05

1

Upstream

Single

Round

1.6

10.9

0

1.5

2.1

Insignificant

Noncohesive

0.39

12.00

31.00

44.00

8.9

0.4

0.2

331

60

OH

12/31/1992

11:05

3

Upstream

Single

Round

1.6

10.9

85

0.8

1.8

Insignificant

Noncohesive

0.09

9.00

33.50

71.00

19.3

0.3

0.2

332

41

OH

5/16/1990

10:00

2

Upstream

Single

Round

1.1

24.9

0

1.4

3.9

Insignificant

Noncohesive

0.75

1.82

5.00

8.80

2.6

0.5

0.2

333

41

OH

7/18/1992

12:45

2

Upstream

Single

Round

1.1

24.9

8

1.5

3.7

Insignificant

Noncohesive

0.75

1.82

5.00

8.80

2.6

0.4

0.2

334

41

OH

1/29/1994

9:10

2

Upstream

Single

Round

1.1

24.9

0

1.8

4.1

Insignificant

Noncohesive

0.25

1.30

14.00

18.00

7.5

0.3

0.2

335

41

OH

5/16/1990

10:00

3

Upstream

Single

Round

1.1

24.9

0

1.4

4.1

Insignificant

Noncohesive

0.14

0.78

1.60

1.80

3.4

0.3

0.2

336

61

OH

7/17/1992

11:40

1

Upstream

Single

Sharp

0.9

17.4

60

0.2

2.2

Insignificant

Noncohesive

-

0.01

0.08

0.33

-

0.2

0.2

337

61

OH

11/13/1992

12:10

1

Upstream

Single

Sharp

0.9

17.4

60

0.2

1.8

Insignificant

Noncohesive

-

0.06

0.18

5.40

-

0.2

0.2

338

61

OH

1/29/1994

10:55

1

Upstream

Single

sSharp

0.9

17.4

66

0.2

1.6

Unknown

Noncohesive

0.57

8.20

32.00

40.00

7.5

0.5

0.2

339

61

OH

7/17/1992

11:40

2

Upstream

Single

Sharp

0.9

17.4

66

0.2

2.3

Insignificant

Noncohesive

-

0.01

0.70

0.96

-

0.4

0.2

340

61

OH

11/13/1992

12:10

2

Upstream

Single

Sharp

0.9

17.4

66

0.2

1.9

Insignificant

Noncohesive

0.05

0.25

9.50

25.00

14.1

0.5

0.2

341

61

OH

1/29/1994

10:55

2

Upstream

Single

Sharp

0.9

17.4

66

0.3

1.7

Unknown

Noncohesive

3.50

18.00

33.00

43.00

3.1

0.5

0.2

342

61

OH

7/17/1992

11:40

3

Upstream

Single

Sharp

0.9

17.4

63

0.5

2.8

Insignificant

Noncohesive

2.20

36.30

64.00

72.00

5.4

1.0

0.2

343

61

OH

11/13/1992

12:10

3

Upstream

Single

Sharp

0.9

17.4

63

0.5

2.4

Insignificant

Noncohesive

1.65

22.50

39.50

47.00

4.9

0.8

0.2

344

61

OH

1/29/1994

10:55

3

Upstream

Single

Sharp

0.9

17.4

63

0.6

2.4

Unknown

Noncohesive

4.00

21.00

65.00

71.00

4.0

1.0

0.2

345

61

OH

7/17/1992

11:40

4

Upstream

Single

Sharp

0.9

17.4

62

0.8

3.0

Insignificant

Noncohesive

5.00

12.70

60.00

69.00

3.5

0.7

0.2

346

61

OH

11/13/1992

12:10

4

Upstream

Single

Sharp

0.9

17.4

64

0.6

2.7

Insignificant

Noncohesive

1.40

14.00

36.00

41.00

5.1

1.2

0.2

347

61

OH

1/29/1994

10:55

4

Upstream

Single

Sharp

0.9

17.4

60

0.7

2.4

Unknown

Noncohesive

6.50

27.00

43.00

48.00

2.6

1.5

0.2

348

61

OH

7/17/1992

11:40

5

Upstream

Single

Sharp

0.9

17.4

65

0.8

2.9

Insignificant

Noncohesive

1.60

4.10

10.30

38.00

6.4

0.6

0.2

349

61

OH

11/13/1992

12:10

5

Upstream

Single

Sharp

0.9

17.4

65

0.6

2.6

Insignificant

Noncohesive

2.70

29.00

58.00

70.00

4.6

0.9

0.2

350

61

OH

1/29/1994

10:55

5

Upstream

Single

Sharp

0.9

17.4

66

0.6

2.2

Unknown

Noncohesive

4.00

32.00

53.00

63.00

3.6

0.8

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)

Grad-ation

Scour Depth (m)

Ac-curacy (m)

351

61

OH

7/17/1992

11:40

6

Upstream

Single

Sharp

0.9

17.4

60

0.8

2.9

Insignificant

Noncohesive

1.00

35.50

62.00

70.00

7.9

0.8

0.2

352

61

OH

11/13/1992

12:10

6

Upstream

Single

Sharp

0.9

17.4

57

0.9

2.6

Insignificant

Noncohesive

9.50

31.00

56.00

79.00

2.4

1.0

0.2

353

61

OH

1/29/1994

10:55

6

Upstream

Single

Sharp

0.9

17.4

60

0.7

2.3

Unknown

Noncohesive

9.00

34.00

55.00

65.00

2.5

1.0

0.2

354

61

OH

7/17/1992

11:40

7

Upstream

Single

Sharp

0.9

17.4

60

0.8

3.0

Insignificant

Noncohesive

0.98

4.10

58.00

70.00

7.7

0.9

0.2

355

61

OH

11/13/1992

12:10

7

Upstream

Single

Sharp

0.9

17.4

60

0.7

2.5

Insignificant

Noncohesive

7.80

56.00

80.00

90.00

3.2

1.1

0.2

356

61

OH

1/29/1994

10:55

7

Upstream

Single

Sharp

0.9

17.4

60

0.7

2.3

Unknown

Noncohesive

4.20

24.00

45.00

62.00

3.3

1.1

0.2

357

42

OH

12/31/1990

13:00

1

Upstream

Single

Round

0.8

9.1

22

1.5

5.3

Insignificant

Noncohesive

0.86

2.85

4.70

6.00

2.3

0.8

0.2

358

42

OH

7/14/1992

10:50

1

Upstream

Single

Round

0.8

9.1

32

0.9

3.6

Insignificant

Noncohesive

0.42

11.50

55.00

80.00

11.4

0.8

0.2

359

42

OH

7/17/1992

12:40

1

Upstream

Single

Round

0.8

9.1

20

1.2

3.5

Insignificant

Noncohesive

0.42

11.50

55.00

80.00

11.4

0.7

0.2

360

42

OH

1/29/1994

13:50

1

Upstream

Single

Round

0.8

9.1

14

1.8

5.2

Unknown

Noncohesive

0.68

2.50

8.00

14.00

3.4

0.7

0.2

361

42

OH

12/31/1990

13:00

2

Upstream

Single

Round

0.8

9.1

16

0.7

4.2

Insignificant

Noncohesive

0.03

0.17

0.25

0.45

2.8

0.3

0.2

362

42

OH

7/14/1992

10:50

2

Upstream

Single

Round

0.8

9.1

12

0.6

2.3

Insignificant

Noncohesive

0.05

0.15

0.30

0.38

6.3

0.3

0.2

363

42

OH

7/17/1992

12:40

2

Upstream

Single

Round

0.8

9.1

8

1.2

2.0

Insignificant

Noncohesive

0.05

0.15

0.30

0.38

6.3

0.3

0.2

364

42

OH

1/29/1994

13:50

2

Upstream

Single

Round

0.8

9.1

0

0.8

3.7

Unknown

Noncohesive

0.07

0.16

0.26

0.38

2.0

0.2

0.2

365

43

OH

2/2/1990

15:30

2

Upstream

Single

Round

1.0

10.9

0

1.2

2.0

Insignificant

Noncohesive

9.30

18.00

34.00

44.00

1.9

0.5

0.2

366

43

OH

7/15/1992

14:25

2

Upstream

Single

Round

0.9

10.9

12

1.2

2.1

Insignificant

Noncohesive

12.00

54.00

69.00

85.00

2.4

0.4

0.2

367

43

OH

7/17/1992

10:40

2

Upstream

Single

Round

0.9

10.9

0

1.2

2.1

Insignificant

Noncohesive

12.00

54.00

69.00

85.00

2.4

0.5

0.2

368

48

OH

5/17/1990

12:15

1

Upstream

Single

Round

0.8

9.6

0

0.7

2.2

Insignificant

Noncohesive

0.08

0.19

0.54

1.10

2.6

0.4

0.2

369

48

OH

7/23/1990

13:05

1

Upstream

Single

Round

0.8

9.6

0

0.9

2.8

Insignificant

Noncohesive

0.08

0.19

0.54

1.10

2.6

0.4

0.2

370

44

OH

5/16/1990

14:30

1

Upstream

Single

Round

0.8

7.4

0

1.4

2.6

Insignificant

Noncohesive

14.70

35.00

38.00

39.00

1.6

0.2

0.2

371

44

OH

12/19/1990

10:10

1

Upstream

Single

Round

0.8

7.4

0

1.5

2.3

Insignificant

Noncohesive

14.70

35.00

38.00

39.00

1.6

0.8

0.3

372

44

OH

12/19/1990

10:10

2

Upstream

Single

Round

0.8

7.4

0

1.1

1.7

Insignificant

Noncohesive

12.00

60.00

71.00

75.00

2.4

0.2

0.2

373

62

OH

1/5/1993

12:10

1

Upstream

Single

Round

1.6

11.3

0

1.0

0.9

Substantial

Noncohesive

11.50

19.00

32.00

42.00

1.7

1.2

0.2

374

62

OH

7/2/1993

10:30

1

Upstream

Single

Round

1.6

11.3

0

1.2

1.6

Substantial

Noncohesive

3.80

25.00

56.00

69.00

3.8

1.4

0.2

375

62

OH

1/28/1994

11:25

1

Upstream

Single

Round

1.6

11.3

0

1.4

2.0

Unknown

Noncohesive

3.80

25.00

56.00

69.00

3.8

1.0

0.2

376

63

OH

1/28/1994

10:50

1

Upstream

Group

Square

0.3

14.4

14

0.3

1.8

Unknown

Noncohesive

0.12

0.46

1.20

1.80

3.2

0.2

0.2

377

64

OH

7/14/1992

10:45

2

Upstream

Single

Sharp

1.2

16.4

32

0.8

1.7

Insignificant

Noncohesive

4.10

17.30

44.00

53.00

3.3

0.4

0.2

378

64

OH

7/18/1992

10:15

2

Upstream

Single

Sharp

1.2

16.4

37

1.1

3.8

Insignificant

Noncohesive

4.10

17.30

44.00

53.00

3.3

0.5

0.2

379

64

OH

1/6/1993

13:10

2

Upstream

Single

Sharp

1.2

16.4

15

1.5

6.0

Insignificant

Noncohesive

4.10

12.00

44.00

53.00

2.6

0.2

0.2

380

64

OH

7/14/1992

10:45

3

Upstream

Single

Sharp

1.2

16.4

36

0.9

1.5

Insignificant

Noncohesive

0.34

1.30

3.00

6.60

3.0

0.3

0.2

381

64

OH

7/18/1992

10:15

3

Upstream

Single

Sharp

1.2

16.4

32

0.8

3.6

Substantial

Noncohesive

0.34

1.30

3.00

6.60

3.0

0.4

0.2

382

64

OH

1/6/1993

13:10

3

Upstream

Single

Sharp

1.2

16.4

10

0.9

5.8

Moderate

Noncohesive

0.18

2.85

8.80

14.00

7.0

0.2

0.2

383

45

OH

8/22/1990

10:40

1

Upstream

Single

Round

0.8

11.4

0

0.8

1.6

Unknown

Noncohesive

0.90

4.00

26.00

45.00

5.7

0.8

0.2

384

45

OH

12/30/1990

14:30

1

Upstream

Single

Round

0.8

11.4

0

1.3

3.2

Unknown

Noncohesive

0.90

4.00

26.00

45.00

5.7

0.7

0.2

385

45

OH

7/17/1992

14:15

1

Upstream

Single

Round

0.8

11.4

0

1.2

2.3

Moderate

Noncohesive

0.66

6.80

30.50

44.00

6.8

0.5

0.2

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