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 |
Previous | Table
of Contents | Next
| 
