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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.

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)

386

45

OH

8/22/1990

10:40

2

Upstream

Single

Round

0.8

11.4

0

0.2

1.5

Insignificant

Noncohesive

0.08

0.25

5.00

7.90

8.0

0.2

0.2

387

45

OH

12/30/1990

14:30

2

Upstream

Single

Round

0.8

11.4

0

0.7

3.1

Insignificant

Noncohesive

0.08

0.25

5.00

7.90

8.0

0.2

0.2

388

65

OH

1/28/1994

10:50

1

Upstream

Single

Round

1.3

8.3

18

1.5

4.5

Insignificant

Noncohesive

0.10

0.30

0.75

1.40

2.7

0.6

0.2

389

65

OH

1/28/1994

10:50

2

Upstream

Single

Round

1.3

8.3

18

1.7

6.0

Unknown

Noncohesive

0.46

2.20

8.00

15.00

4.2

0.9

0.2

390

46

OH

5/14/1990

16:05

1

Upstream

Single

Sharp

1.1

10.2

8

0.4

1.8

Moderate

Noncohesive

0.03

0.17

0.36

0.70

3.5

0.2

0.2

391

46

OH

5/18/1990

10:50

1

Upstream

Single

Sharp

1.1

10.2

8

0.5

2.5

Insignificant

Noncohesive

0.03

0.17

0.36

0.70

3.5

0.1

0.2

392

46

OH

12/31/1990

11:55

1

Upstream

Single

Sharp

1.1

10.2

8

0.8

4.2

Insignificant

Noncohesive

0.03

0.17

0.36

0.70

3.5

0.2

0.2

393

66

OH

1/29/1994

11:50

28

Upstream

Single

Round

1.4

18.3

0

0.9

3.7

Insignificant

Noncohesive

0.70

6.00

18.00

22.00

5.1

0.4

0.2

394

66

OH

1/29/1994

11:50

29

Upstream

Single

Round

1.4

18.3

8

1.5

5.9

Unknown

Noncohesive

0.18

0.59

1.30

1.70

2.7

1.3

0.2

395

66

OH

1/29/1994

11:50

30

Upstream

Single

Round

1.4

18.3

10

1.3

5.7

Unknown

Noncohesive

0.04

2.41

16.00

19.00

19.8

1.9

0.2

396

67

OH

1/14/1993

11:15

1

Upstream

Single

Round

0.9

18.8

0

1.3

1.7

Insignificant

Noncohesive

0.74

21.50

66.00

82.00

9.4

0.2

0.2

397

67

OH

12/6/1993

8:20

1

Upstream

Single

Round

0.9

18.8

0

1.3

1.8

Unknown

Noncohesive

6.10

19.00

45.00

63.00

2.7

0.2

0.2

398

69

OH

1/15/1993

10:45

2

Upstream

Single

Round

1.0

8.9

0

1.2

2.3

Insignificant

Noncohesive

0.46

1.15

3.10

8.50

2.6

0.5

0.2

399

69

OH

12/6/1993

10:00

2

Upstream

Single

Round

1.0

8.9

0

1.5

2.4

Insignificant

Noncohesive

1.30

10.00

27.00

40.00

4.6

0.7

0.2

400

69

OH

1/15/1993

10:45

3

Upstream

Single

Round

1.0

8.9

0

1.3

3.0

Moderate

Unknown

4.40

11.50

22.00

33.00

2.2

0.4

0.2

401

69

OH

12/6/1993

10:00

3

Upstream

Single

Round

1.0

8.9

0

1.4

3.1

Unknown

Noncohesive

3.70

17.00

29.00

38.00

2.8

0.5

0.2

402

47

OH

5/16/1990

11:45

1

Upstream

Single

Round

1.1

11.9

0

1.6

1.6

Insignificant

Noncohesive

0.67

5.00

16.00

22.00

4.9

0.4

0.2

403

47

OH

5/17/1990

9:05

1

Upstream

Single

Round

1.1

11.9

0

2.1

2.9

Insignificant

Noncohesive

0.67

5.00

16.00

22.00

4.9

0.7

0.2

404

47

OH

12/18/1990

14:30

1

Upstream

Single

Round

1.1

11.9

0

1.8

3.1

Insignificant

Noncohesive

0.67

5.00

16.00

22.00

4.9

0.5

0.2

405

47

OH

1/28/1994

12:50

1

Upstream

Single

Round

1.1

11.9

0

1.8

2.5

Insignificant

Noncohesive

13.00

30.00

40.00

46.00

1.8

0.6

0.2

406

47

OH

5/16/1990

11:45

2

Upstream

Single

Round

1.3

11.9

0

1.7

2.0

Insignificant

Noncohesive

4.55

17.00

29.00

40.00

2.5

0.7

0.2

407

47

OH

5/17/1990

9:05

2

Upstream

Single

Round

1.3

11.9

0

2.1

3.2

Insignificant

Noncohesive

4.55

17.00

29.00

40.00

2.5

0.9

0.2

408

47

OH

12/18/1990

14:30

2

Upstream

Single

Round

1.4

11.9

0

2.0

3.4

Insignificant

Noncohesive

4.55

17.00

29.00

40.00

2.5

1.0

0.2

409

47

OH

1/28/1994

12:50

2

Upstream

Single

Round

1.3

11.9

0

1.7

2.7

Insignificant

Unknown

37.00

51.00

63.00

70.00

1.3

1.0

0.2

410

71

OH

7/13/1992

12:30

1

Upstream

Single

Round

0.6

10.2

0

0.9

2.0

Insignificant

Noncohesive

1.20

6.80

16.00

23.00

3.7

0.5

0.2

411

71

OH

7/17/1992

15:00

1

Upstream

Single

Round

0.6

10.2

0

1.2

3.1

Moderate

Noncohesive

1.20

6.80

16.00

23.00

3.7

0.3

0.2

412

74

TX

10/23/1994

-

6

Downstream

Group

Square

22.9

14.0

0

2.4

12.5

Substantial

Cohesive

-

-

-

-

-

7.5

0.9

413

51

VA

5/29/1990

12:00

2

Upstream

Single

Round

0.8

13.1

0

0.6

2.7

Unknown

Unknown

0.29

0.92

4.80

10.50

4.1

0.8

0.3

414

52

VA

10/24/1990

11:00

1

Upstream

Single

Round

1.0

25.3

0

1.6

6.2

Unknown

Noncohesive

0.14

0.28

0.46

0.77

1.8

1.1

0.3

415

52

VA

10/25/1990

11:00

1

Upstream

Single

Round

1.0

25.3

0

1.9

7.9

Unknown

Noncohesive

0.14

0.28

0.46

0.77

1.8

1.2

0.3

416

52

VA

4/22/1992

12:00

1

Upstream

Single

Round

1.0

25.3

0

1.3

5.8

Unknown

Noncohesive

0.14

0.28

0.46

0.77

1.8

0.8

0.3

417

52

VA

10/25/1990

11:00

2

Upstream

Single

Round

1.0

25.3

0

2.2

9.3

Unknown

Noncohesive

0.14

0.28

0.46

0.77

1.8

1.1

0.3

418

52

VA

4/22/1992

12:00

2

Upstream

Single

Round

1.0

25.3

0

1.7

8.4

Unknown

Noncohesive

0.14

0.28

0.46

0.77

1.8

1.5

0.3

419

54

VA

5/2/1989

13:00

1

Upstream

Single

Round

0.7

8.5

0

0.7

1.7

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

0.3

420

54

VA

8/24/1990

10:30

1

Upstream

Single

Round

0.7

8.5

0

0.7

1.8

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

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)

421

54

VA

8/24/1990

14:30

1

Upstream

Single

Round

0.7

8.5

0

0.6

1.6

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.2

0.3

422

54

VA

3/29/1991

12:30

1

Upstream

Single

Round

0.7

8.5

0

0.4

0.9

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

0.3

423

54

VA

3/29/1991

15:30

1

Upstream

Single

Round

0.7

8.5

0

0.5

1.4

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

0.3

424

54

VA

3/29/1991

17:30

1

Upstream

Single

Round

0.7

8.5

0

0.5

1.6

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

0.3

425

54

VA

5/2/1989

13:00

2

Upstream

Single

Round

0.7

8.5

0

0.2

1.0

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.5

0.3

426

54

VA

8/24/1990

10:30

2

Upstream

Single

Round

0.7

8.5

0

0.3

0.9

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.7

0.3

427

54

VA

5/2/1989

13:00

3

Upstream

Single

Round

0.7

8.5

0

0.2

0.9

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.5

0.3

428

54

VA

8/24/1990

10:30

3

Upstream

Single

Round

0.7

8.5

0

0.3

0.8

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

0.3

429

54

VA

8/24/1990

14:30

3

Upstream

Single

Round

0.7

8.5

0

0.2

0.6

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.4

0.3

430

54

VA

3/29/1991

17:30

3

Upstream

Single

Round

0.7

8.5

0

0.5

1.1

Unknown

Unknown

0.35

0.69

1.30

1.90

1.9

0.5

0.3

431

56

VA

5/29/1990

11:00

1

Upstream

Single

Round

0.6

9.0

0

1.2

2.2

Unknown

Noncohesive

18.00

37.00

75.00

180.00

2.0

0.1

0.3

432

56

VA

5/29/1990

11:00

2

Upstream

Single

Round

0.6

9.0

0

1.4

2.4

Unknown

Unknown

18.00

37.00

75.00

180.00

2.0

0.1

0.3

433

56

VA

3/30/1991

10:00

2

Upstream

Single

Round

0.6

9.0

0

1.4

2.6

Unknown

Unknown

18.00

37.00

75.00

180.00

2.0

0.2

0.3

434

56

VA

2/26/1992

10:00

2

Upstream

Single

Round

0.6

9.0

0

1.4

3.0

Unknown

Unknown

18.00

37.00

75.00

180.00

2.0

0.3

0.3

435

56

VA

3/4/1993

13:30

2

Upstream

Single

Round

0.6

9.0

0

1.5

3.0

Unknown

Unknown

18.00

37.00

75.00

180.00

2.0

0.2

0.3

436

56

VA

3/4/1993

17:30

2

Upstream

Single

Round

0.6

9.0

0

1.6

3.3

Unknown

Unknown

18.00

37.00

75.00

180.00

2.0

0.4

0.3

437

50

VA

1/16/1991

10:30

CNTR

Upstream

Single

Round

0.9

9.8

0

0.9

4.7

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.3

0.3

438

50

VA

1/18/1991

10:30

CNTR

Upstream

Single

Round

0.9

9.8

0

0.8

4.9

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.5

0.3

439

50

VA

4/4/1991

14:30

CNTR

Upstream

Single

Round

0.9

9.8

0

1.0

5.0

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

440

50

VA

4/5/1991

12:00

CNTR

Upstream

Single

Round

0.9

9.8

0

1.0

4.8

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

441

50

VA

3/12/1992

11:30

CNTR

Upstream

Single

Round

0.9

9.8

0

0.9

4.5

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

442

50

VA

3/11/1993

9:30

CNTR

Upstream

Single

Round

0.9

9.8

0

1.1

5.0

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

443

50

VA

3/17/1993

9:30

CNTR

Upstream

Single

Round

0.9

9.8

0

1.0

5.1

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.5

0.3

444

50

VA

3/18/1993

12:00

CNTR

Upstream

Single

Round

0.9

9.8

0

1.1

4.8

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.6

0.3

445

50

VA

3/19/1993

11:00

CNTR

Upstream

Single

Round

0.9

9.8

0

1.1

5.2

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.6

0.3

446

50

VA

4/1/1993

10:00

CNTR

Upstream

Single

Round

0.9

9.8

0

1.1

4.7

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.6

0.3

447

50

VA

1/16/1991

10:30

LEFT

Upstream

Single

Round

0.9

9.8

0

0.9

4.3

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.3

0.3

448

50

VA

1/18/1991

10:30

LEFT

Upstream

Single

Round

0.9

9.8

0

0.8

4.4

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.2

0.3

449

50

VA

4/4/1991

14:30

LEFT

Upstream

Single

Round

0.9

9.8

0

0.9

4.5

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.3

0.3

450

50

VA

4/5/1991

12:00

LEFT

Upstream

Single

Round

0.9

9.8

0

0.9

4.3

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.3

0.3

451

50

VA

3/12/1992

11:30

LEFT

Upstream

Single

Round

0.9

9.8

0

0.9

4.4

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.5

0.3

452

50

VA

3/11/1993

9:30

LEFT

Upstream

Single

Round

0.9

9.8

0

1.0

4.6

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

453

50

VA

3/17/1993

9:30

LEFT

Upstream

Single

Round

0.9

9.8

0

1.0

4.4

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

454

50

VA

3/18/1993

12:00

LEFT

Upstream

Single

Round

0.9

9.8

0

1.0

4.6

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.5

0.3

455

50

VA

3/19/1993

11:00

LEFT

Upstream

Single

Round

0.9

9.8

0

1.0

4.6

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.5

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)

456

50

VA

4/1/1993

10:00

LEFT

Upstream

Single

Round

0.9

9.8

0

1.0

4.7

Unknown

Unknown

0.35

0.74

2.00

4.00

2.4

0.4

0.3

457

49

VA

5/31/1990

13:30

CNTR

Upstream

Single

Round

0.9

10.7

0

1.4

8.7

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.5

0.3

458

49

VA

1/14/1991

12:00

CNTR

Upstream

Single

Round

0.9

10.7

0

1.0

7.3

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.8

0.3

459

49

VA

12/13/1992

11:30

CNTR

Upstream

Single

Round

0.9

10.7

0

1.0

4.9

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.4

0.3

460

49

VA

12/14/1992

10:00

CNTR

Upstream

Single

Round

0.9

10.7

0

1.0

6.9

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.1

0.3

461

49

VA

12/15/1992

11:00

CNTR

Upstream

Single

Round

0.9

10.7

0

0.9

6.7

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.4

0.3

462

49

VA

1/11/1993

12:00

CNTR

Upstream

Single

Round

0.9

10.7

0

0.9

6.5

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.6

0.3

463

49

VA

1/12/1993

10:30

CNTR

Upstream

Single

Round

0.9

10.7

0

0.9

6.6

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.3

0.3

464

49

VA

4/12/1993

12:00

CNTR

Upstream

Single

Round

0.9

10.7

0

1.0

7.5

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.2

0.3

465

49

VA

4/13/1993

9:30

CNTR

Upstream

Single

Round

0.9

10.7

0

1.0

7.4

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.1

0.3

466

49

VA

4/19/1993

10:00

CNTR

Upstream

Single

Round

0.9

10.7

0

1.0

7.6

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.1

0.3

467

49

VA

5/31/1990

13:30

LEFT

Upstream

Single

Round

0.9

10.7

0

0.5

6.5

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

1.0

0.3

468

49

VA

12/13/1992

11:30

LEFT

Upstream

Single

Round

0.9

10.7

0

0.4

5.0

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

469

49

VA

12/14/1992

10:00

LEFT

Upstream

Single

Round

0.9

10.7

0

0.4

5.3

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.9

0.3

470

49

VA

12/15/1992

11:00

LEFT

Upstream

Single

Round

0.9

10.7

0

0.3

5.2

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.6

0.3

471

49

VA

1/11/1993

12:00

LEFT

Upstream

Single

Round

0.9

10.7

0

0.3

4.8

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

472

49

VA

1/12/1993

10:30

LEFT

Upstream

Single

Round

0.9

10.7

0

0.3

5.0

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.9

0.3

473

49

VA

4/12/1993

12:00

LEFT

Upstream

Single

Round

0.9

10.7

0

0.5

5.5

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

474

49

VA

4/13/1993

9:30

LEFT

Upstream

Single

Round

0.9

10.7

0

0.4

5.6

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.6

0.3

475

49

VA

4/19/1993

10:00

LEFT

Upstream

Single

Round

0.9

10.7

0

0.5

5.8

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.7

0.3

476

49

VA

5/31/1990

13:30

RT

Upstream

Single

Round

0.9

10.7

0

0.6

8.0

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.9

0.3

477

49

VA

12/13/1992

11:30

RT

Upstream

Single

Round

0.9

10.7

0

0.4

5.9

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

478

49

VA

12/14/1992

10:00

RT

Upstream

Single

Round

0.9

10.7

0

0.4

6.1

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.6

0.3

479

49

VA

12/15/1992

11:00

RT

Upstream

Single

Round

0.9

10.7

0

0.2

5.7

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.4

0.3

480

49

VA

1/11/1993

12:00

RT

Upstream

Single

Round

0.9

10.7

0

0.3

5.6

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

481

49

VA

1/12/1993

10:30

RT

Upstream

Single

Round

0.9

10.7

0

0.3

5.9

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.4

0.3

482

49

VA

4/12/1993

12:00

RT

Upstream

Single

Round

0.9

10.7

0

0.4

6.3

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

483

49

VA

4/13/1993

9:30

RT

Upstream

Single

Round

0.9

10.7

0

0.3

6.4

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.5

0.3

484

49

VA

4/19/1993

10:00

RT

Upstream

Single

Round

0.9

10.7

0

0.3

7.1

Unknown

Unknown

0.32

0.70

1.60

2.80

2.2

0.9

0.3

485

55

VA

3/29/1991

14:30

2

Upstream

Single

Round

0.6

9.1

0

1.1

0.8

Unknown

Noncohesive

38.00

55.00

84.00

130.00

1.5

0.5

0.3

486

55

VA

6/5/1992

10:30

2

Upstream

Single

Round

0.6

9.1

0

1.7

3.2

Unknown

Noncohesive

38.00

55.00

84.00

130.00

1.5

0.6

0.3

487

55

VA

3/24/1993

9:30

2

Upstream

Single

Round

0.6

9.1

0

2.0

3.2

Unknown

Noncohesive

38.00

55.00

84.00

130.00

1.5

0.5

0.3

488

53

VA

5/3/1989

12:00

2

Upstream

Single

Round

0.6

12.5

0

0.6

0.5

Unknown

Noncohesive

33.00

72.00

170.00

250.00

2.3

0.2

0.3

489

53

VA

5/7/1989

9:00

2

Upstream

Single

Round

0.6

12.5

0

1.6

0.7

Unknown

Noncohesive

33.00

72.00

170.00

250.00

2.3

0.2

0.3

490

53

VA

4/22/1992

11:00

2

Upstream

Single

Round

0.6

12.5

0

1.6

1.7

Unknown

Noncohesive

33.00

72.00

170.00

250.00

2.3

0.5

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)

491

53

VA

5/3/1989

12:00

3

Upstream

Single

Round

0.6

12.5

0

1.2

1.2

Unknown

Noncohesive

33.00

72.00

170.00

250.00

2.3

0.3

0.3

492

53

VA

5/7/1989

9:00

3

Upstream

Single

Round

0.6

12.5

0

1.6

1.5

Unknown

Noncohesive

33.00

72.00

170.00

250.00

2.3

0.4

0.3

493

53

VA

4/22/1992

11:00

3

Upstream

Single

Round

0.6

12.5

0

2.6

2.6

Unknown

Noncohesive

33.00

72.00

170.00

250.00

2.3

0.8

0.3

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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