SWA000204_Design Calculations_20230425

YMI
YARBROUGH-WILLIAMS & HoULE, INC.
Planning • Surveying * Engineering
730 WINDSOR OAK COURT (28273)
P.O. BOX 7007 (28241)
CHARLOTTE, NC
PHONE [phone] FAX [phone]
NC CORPORATE REGISTRATION #C-0475
CALCULATION
FOR
GLENNS II
DATE: 02/17/23
CONTENTS:
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7637 -
frrrH rru rlt►►►►► � 3
• STORM DRAINAGE CALCULATIONS
• GUTTER SPREAD CALCULATIONS
• DROP INLET CALCULATIONS
• RIP RAP APRON CALCULATIONS
• SEDIMENT BASIN CALCULATIONS
• SKIMMER CALCULATIONS
• TEMPORARY DIVERSION DITCHES
• WET POND # 1 CALCULATIONS
• WET POND #2 CALCULATIONS

STORM DRAINAGE
CALCULATIONS

P. O .BOX 1198
PINEVILLE, N.C. 28134
Phone: [phone]
Fax: [phone]
YARBROUGH-WILLIAMS & HOULE, INC.
STORM DRAIN CALCULATIONS Planning • Surveying • Engineering
Version9.27.12 Project Name: GLENNS II
REV,
REV.
REV.
WKD
10 YR RUNOFF COEFFICIENT =
0.6
- INPUT CELLS DATE: 2/21/2023 WKD
SURFACE
LATERAL
1DRAINAGI
DESIGN
RUNOFF
SECTION
TC from HYDROCAD OR
RAINFALL
RAINFALL
RAINFALL
INL/CONT
PIPE
PIPE
PIPE
/A
ACTUAL
STRUCTUR
STRUCTU
LENGTH
SLOPE
RAINAG .
PIPES
AREA
RE DENC
MANNING'S
COEFF,
FLOW TIME
ACCUM. FLOW TIME
Tc
INTENSITY
INTENSITY
INTENSITY
RUNOFF
Q MAX
DIAMETER
DIAMETER
CAPACITY
VEL.
VEL.
FROM
TO
FEET
%
AREA
AREA
TOTAL
10/25/100
n
C USED
MINUTES
MINUTES
USED
10 YR
25 YR.
100 YR
CFS
HW/D: 1.2
REQUIRED
DESIGNED
Q FULL
FPS
FPS
1
2
45.12
0.51
0A8
0.68
10
0.012
0.60
0.18
0.01
5M
7.03
287
12,17
15
5.00
23
4.1
2
3
97.24
0.51
0.39
107
10
0.012
0.60
0.35
0.19
5M
7.03
4.51
14.42
15
5,00
3.7
4.6
3
4
37.75
0.64
0.06
1,13
10
0.012
0.60
0.12
0.55
5,00
703
477
14.11
15
5.60
3.9
5.1
4
5
18638
0.65
0.17
0.34
1.64
10
0.012
0.60
0.55
0.67
5.00
7.03
692
16.18
18
9,17
3.9
5.7
5
6
117.41
0.50
0,66
0.74
3.04
10
0.012
0.60
032
121
5.00
7.03
12.82
21.42
24
17.32
M
6.0
6
7
52.74
1.71
0.17
3.21
10
0,012
0,60
0.09
1.54
5.00
7.03
1354
17.36
24
32.04
4.3
9.6
7
8
24.00
0.50
0.05
3.26
10
0.012
0.60
0.07
1.63
5.00
7,03
1375
21,99
24
17.32
4.4
60
8
9
73.00
0,51
0.03
3.29
10
0.012
0.60
0,20
L70
5M
7.03
13 88
21.98
24
17.50
4.4
61
9
27
13937
0.50
0.10
2,19
5.58
10
0,012
060
0.33
1,90
5,00
703
23.54
26.89
30
3141
4.8
70
27
28
277.47
0,50
0.03
5.61
10
0.012
0.60
0.66
2.23
5,00
703
23.66
26.95
30
31.41
4.8
7.0
28
28A
268.45
0.51
007
5.68
10
0.012
0.60
0.63
2,89
5.00
703
23,96
26.97
30
31.72
4.9
71
28A
82
178.00
1.00
0.10
5.78
10
0,012
0.60
0.32
3.52
500
703
2438
23.93
30
44A2
5.0
9.2
13
14
61.15
0.51
0,81
0.81
16
0.012
0.60
0.18
0.01
5.00
7,03
342
12.99
15
5.00
2 8
4.4
14
15
90.80
0.62
0.57
1.38
10
0.012
0,60
028
0.19
5.00
7.03
5.82
1530
18
8.96
3 3
5.4
15
16
51.89
0.60
0.10
1.48
10
0.012
0.60
0.16
0.47
5.00
7.03
6.24
15.80
18
8.81
3.5
5.3
16
17
24.00
1 0.62
0.11
1.59
10
0 012
0.60
0,07
063
5,00
7.03
6.71
16.13
18
8.96
38
5.5
17
18
51.16
0.61
0.13
1.72
10
0.012
0,60
0.15
0.71
5.00
7.03
725
16.66
18
8.88
4.1
5.6
18
19
135.63
0.51
0.02
1.74
10
0 012
0.60
0.44
0.86
5.00
7.03
734
17.31
181
8.12
4.2
5.2
19
20
97.77
0.50
0.17
0.56
2.47
10
0 012
0.60
0.28
1.30
500
7.03
1042
19.81
24
17.32
3.3
5.8
20
21
126.47
0.50
0.13
0.42
3.02
10
0.012
0,60
0.35
1.58
5.00
T03
1274
2136
24
17.32
4,1
6,0
21
22
154.10
0.51
037
2.12
5.51
10
0.012
0.60
0.37
1.93
500
7.03
2324
26.67
30
31.72
4.7
TO
22
HW 23
42.87
0.51
5.51
10
0.012
0.60
0.10
230
5.00
7.03
2324
26.67
30
31.72
4.7
7.0
24
4
24.00
050
0.34
0.34
10
0.012
060
0.12
0.01
5.00
703
1 43
9.42
15
4.95
12
3.5
25
5
24,00
0.50
074
0.74
10
0.012
0.60
0.09
0.01
5.00
7.03
3.12
1261
15
4.95
2.5
42
26
10
24.00
0.50
0.74
0.74
10
0.012
060
0,09
0.01
5.00
7.03
312
1261
15
4.95
2.5
4.2
11
12
24.00
0.50
0.39
0.39
10
0.012
0.60
0.11
0.01
5,00
7.03
1 65
992
15
4.95
13
3.6
12
10
1193800
050
0,59
0.98
10
0.012
0.60
44.16
0.12
5.00
7.03
4.13
14.01
15
4.95
3.4
45
10
9
36.98
1,00
0.47
0,74
2.19
10
0.012
0.60
0.11
44.29
44.29
282
370
11 80
15
7.00
3.0
5.7
28
14
24.00
0.50
0.81
081
10
0.012
0.60
0.09
0.01
5,00
703
342
1304
15
4.95
2.8
4.3
29
19
24.00
0,50
0.56
056
10
0.012
060
010
001
5.00
7.03
236
1136
15
4.95
19
40
30
20
24.00
0.50
0.42
1
0.42
10
0 012
0.60
0.11
0.01
5.00
7.03
1 77
1020
15
495
14
3.6
31
32
24.44
0.98
OM
0.02
10
0.012
060
022
0.01
5.00
7.03
0.08
2.87
15
6.93
0.1
18
32
33
96.60
1.27
0.04
0.06
10
0.012
060
0.60
023
5.00
T03
0.25
413
15
7.88
0.2
2.7
33
34
100.74
0.50
0.20
0.26
10
0,012
060
0.52
0.83
5,00
7.03
L10
852
15
4,95
0.9
3.2
34
35
49,61
1.01
0,61
068
1.55
10
0,012
060
0.13
1.35
5.00
7M
6.54
14.58
15
7.03
5.3
6.4
35
21
24.00
0.71
0.57
2.12
10
0,012
0.60
0.07
1.48
5.00
T03
894
1752
18
9.59
5.1
6.1
36
34
24.00
0.50
0.68
0.68
10
0,012
0,60
0.10
0.01
5.00
T03
287
1221
15
495
23
41

P. O .BOX 1198
PINEVILLE, N.C. 28134 YW
Phone: [phone]
Fax: [phone]
YARBROUGH-WI LLIAMS & HOULE, INC.
STORM DRAIN CALCULATIONS Planning • Surveying • Engineering
Version 9.27.12 project Name: GLENNS II
REV.
REV
REV
WKD
10 YR RUNOFF COEFFICIENT =
0.6
v INPUT CELLS DATE: FEBURARY 21 2023 WKD
SURFACE
LATERAL
DRATNAGI
DESIGN
RUNOFF
SECTION
CC from HYDROCAD OR
RAINFALL
RAINFALL
RAINFALL
1NL/CONT
PIPE
PIPE
PIPE
/A
ACTUAL
STRUCTURE
STRUCTURE
LENGTH
SLOPE
)RAINAGI
PIPES
AREA
RE UENC
MANNING'S
COEFF
FLOW TIME
ACCUM. FLOW TIME
Tc
INTENSITY
INTENSITY
INTENSITY
RUNOFF
Q MAX
DIAMETER
DIAMETER
CAPACITY
VEL
VEL
FROM
TO
FEET
%
AREA
AREA
TOTAL
10/251100
n
C USED
MINUTES
MINUTES
USED
10 YR
25 YR
100 YR.
(CFS)
HW/D: 1.2
REQUIRED
DESIGNED
( FULL
FPS
FPS
37
38
28.53
0.53
022
022
10
0 012
0.60
015,
0.01
5.00
7-03
093
791
15
509
08
31
38
39
8101
0.51
012
034
10
0.0121
0.60
0.40
0.16
500
1 7.03
1 43
938
15
500
1.2
35
39
40
52.97
0.51
0.03
037
10
0.012
1 0.60
025
0.56
500
7,03
1 56
969
15
5.00
1.3
35
40
41
2401
0.50
003
040
10
0.012
0.60
0.11
0.81
5.00
7.03
1.69
1001
15
495
1.4
3.6
41
43
9029
0. SO
005
2,47
2.92
ID
0.012
0.60
025
0.92
5.00
703
1232
21.10
24
17.32
3.9
5.9
43
44
8615
060
068
On
442
10
0.012
0.60
021
1.18
500
7.03
1864
23.82
24
18.98
5.9
68
44
77
11745
0.60
0.03
445
10
0.012
0.60
028
134
500
703
18.77
23 88
24
18.98
6.0
69
77
78
2400
0.83
0.41
4.86
10
0,012
0.60
D.05
1.67
500
703
20.50
2322
24
22.32
6.5
80
78
79
5939
0.50
041
527
10
0,012
0.60
0.14
1.72
500
703
22.23
26.32
30
31 41
4.5
6.8
79
71
96.47
050
021
3.80
928
10
0 012
0.60
0.20
186
500
7,03
39 14
3255
361
51.08
5.5
79
48A
81
9924
050
057
0.57
10
0 012
060
0.10
001
5.00
7.03
240
1143
15
495
20
3.9
65
50
24.00
050
0.34
0.34
10
0.012
0.60
0.12
0.01
500
703
1 43
942
15
4.95
1.2
3 5
50
51
125.55
0.50
021
0.55
10
0.012
0.60
0.54
0.13
500
703
232
1128
15
4.95
1.9
3 9
51
52
8010
0.50
0.23
0.66
1 44
10
0.012
0.60
027
0.66
5.00
7.03
607
16.18
18
8.04
3.A
50
52
53
65.98
1 0.50
0.07
1 51
10
0.012
0.60
0.22
093
5.00
7.03
637
16.47
181
8.04
3.6
50
53
54
91.02
0,55
0.09
1.60
10
0.012
0.60
0.29
1.15
500
7.03
675
16.54
18
8.44
3.8
53
54
55
93.65
0-59
0-19
0.45
2.24
10
0.012
0-60
027
1 44
5.00
7.03
945
1852
24
18.82
3.0
5.9
55
56
80.58
0.50
021
245
10
0 012
0,60
024
1.71
5.00
7.03
10.33
19.75
24
17.32
33
5.7
56
57
2400
0.50
0.1E
261
I0
0.012
060
007
1 94
5.00
7.03
11 Ol
2023
24
1732
35
5.9
57
58
17442
050
059
1296
1616
10
0 012
060
033
2 Ol
5.00
7.03
68.16
40.07
42
77.05
7.1
99
58
59
11-96
0.51
1616
10
0,012
0.60
002
234,
5.00
7,03
68.16
3992
42
77.81
7.1
91
67
44
2400
1 0.5D
0.82
1
0.82
10
0.012
060
0.09
001
5.00
703
346
13.10
15
4.95
28
43
68
69
47.71
0,50
0,57
057
10
0.012
0,60
0,20
001
5.00
7.03
240
11 43
15
4.95
2.0
3 9
69
70
78.12
0.51
031
0.88
10
0.012
1 0.60
030
0.21
5 00
7.03
3 71
1340
15
5.00
30
44
70
71
181.54
1,75
0.60
0.61
2.15
10
0 012
060
036 1
0.51
5.00
703
9.07
1487
15
9.25
7.4
85
71
72
2400
063
027
9,28
11.70
10
0 012
060
0.04
1 0.86
5.00
7.03
4935
34.00
36
57.33
70
91
72
73
52-66
0,89
0.24
11.94
10
0 012
060
008
091
500
7.03
5036
32.11
36
68.15
7.1
10 5
73
74
65.19
0.51
0.05
11.99
10
0.012
0.60
0.13
0.99
500
7.03
5057
35.70
36
51.59
7.2
8.2
74
57
92.36
0 50
0.17
1 0.80
12.96
10
0.012
060
018
1.12
5.00
703
1
54.67
36.89
42
77.05
5.7
8.6
75
70
24.00
0.54
0.67
0.67
10
0.012
0.60
0.09
0.01
5.00
7.03
2.83
11.97
15
5.14
23
4.3
76A
76
54.16
0.50
051
0.51
10
0,012
0.60
024
0.01
5.00
703
2.15
10.97
15
4.95
18
3.8
76
74
24.00
0.83
029
080
10
0.012
060
0.08
025
5.00
7.03
3.37
11.90
15
637
28
52
46A
46
63.56
267
045
0,45 1
10
0.012
0.60
0-16
0.01
500
7.D3
1.90
764
15
11.43
1.5
6.7
46
47
24.02
1.08
0.68
1.13
10
0,012
0.60
0.06
0,17
5 00
7.03
4.77
1279
15
727
3.9
6.2
47
48
45A9
1.00
0.68
1.91
10
0.012
0.60
i 0.11
023
500
7,03
7.63
15.48
18
11 38
43
69
48
49
154.41
0.70
0.48
2.29
10
0.012
0.60
0.41
034
500
7.03
966
18.08
24
2050.
31
6.3
49
81
24,00
0.50
0.05
234
10
0.012
0,60
0.07
0.75
500
7.03
987
19.41
24
17.32
3.1
5.6
81
82
64_89
0.51
0.03
0.57
2.94
10
0-012
0.60
0.18
0.82
500
7.03
1240
21.07
24
1750
3.9
5.9
82
83
144.75
0.50
0.13
578
8.85
10
0.012
0.60
031
1.00
5.00
7.03
37.33
31.97
36
51 08
5.3
7 8
83
84
3945
051
0.06
8.91
10
0.012
060
008
0.01
5.00
703
37.58
31.93
36
51 59
5 3
7.9
60
61
12000
100
0.68
0.68
10
0 012
0.60
0.12
0-01
5.00
7.03
2.87
10.73
15
700
2.3
5.4
61
62
2400
E 00
036
1.04
10
0 012 j
066
020
0.13
5.00
703
1
4.39
12.58
15
7.00
3.6
59
62
42
58.44
0.51
0.64
1 68
10
0 012
0.60
0.06
0.33
5.00
7.03
709
17.08
18
8,12
4.0
5 1
42
42A
24.18
0,83
0.42
2 10
10
0.012
0.60
0.12
039
5.00
7.03
886
16.95
18
1036
5.0
53
42A
41
53.17
3.61
0,37
247
10
0.012
0.60
0.05
0,51
5.00
7.03
1042
1
1368
18
21 61
5.9
121
65
50
24.00
0,50
068
068
10
0.012
066
0.10
0.01
5.00
7.03
287
12.21
15
495
23
41
66
51
24.00
100
0.66
066
10
0.012
0.60
0.07
001
500
7.03
2.78
1061
15
7.00
23
54
45
53
185,45
2,81
o.51
0.51
10
0.012
0.60
0.10
0-01
500
7.03
215
7.93
15
11.73
19
6.9
100
101
18332
0.50
3.79
3.79
10
0.012
0,60
0.49
0.01
500
7.03
15.99
2326
24
1732
5.1
6.2
101
79
150.00
0.55
0.01
3.80
10
0_012
0.60
038 1
0.50
5 00
703
16.03
2287
24
18.17
5.1
6.5

GUTTER SPREAD
CALCULATIONS

INLET SPREAD CHART
Version 9.27,12
WKD
Pro ect Paramecars
Intensity: 4.00
C: 0.60
Crown: 0.0313 1 - Input 0.0208 or 0.0313
"yw3
YARBROUGH-WILLIAMS & HOULE, INC.
Planning • Surveying • Engineering
= inaut cells
730 Windsor Oak Ct.
Charlotte, NC 28273
P.O. Box 1198
Pineville NC 28134
Fax: [phone]
Ph. 704-556-1990
Project Name GLENNS II Date: February 8, 2oza
Inlets on Slope
INLET
DRAINAGE
SLOPE
BYPASS
TYPE
SURF Q
BYPASS Q
SURF Q
1 INLET
BYPASS
SLOPE
#
AREA AC
LONG %
TO INLET #
INLET
K
SUB
RECEIVED
TOTAL
Qcap
Q SENT
TRANS.
n
SPREAD
REMARKS
3
006
1.00
4
S
19
014
000
014
030
000
00313
0016
26
1/2 TRAVEL LANE +
4
0.17
1.00
5
S
19
0.41
000
041
057
000
00313
0.016
3.9
1' OF GUTTER = 6 5'
6
0 17
1.00
7
S
19
041
0.00
0.41
057
000
00313
0 016
3 9
MAX SPREAD
7
0.05
1.00
26
S
1 19
0.12
0.00
0.12
0.26
000
00313
0.016
25
8
0.031
1,00
9
S
191
0.07
0.00
007,
0 19
0001
00313
0.016
2,0
9
0.10
1.00
10
S
19
024
0.00
024
041
000
00313
0.016
3.2
11
039
1.00
261
S
19
0.94
000
094
096
000
0.0313
0.016
5.3
12
0.59
1.00
101
S
19
142
0.00
1.42
1 24
0 18
00313
0 016
6.2
0
0.00
0.00
0
15
0.10
1 00
14
S
19
024
000
024
041
000
00313
0,016
3,2
16
Oil
1,00
14
S
19
0 26
0.00
0.26
043
0.00
0.0313
0,016
33
17
0.13
1.00
14
S
19
0.31
0.00
031
0481
0.00
0.0313
0.016
3 5
l8
0-021
1.00
14
S
191
0.05
0,00
0.05
0 15
000
0.0313
0.016
17
19
0 17
1.00
20
S
191
041
0.00
0.41
0.57
000
00313
0,016
39
20
0.13
1.00
21
S
19
031
0.00
031
048
000
0.0313
0.016
3.5
24
0.34
1.00
25
S
19
082
000
082
088
000
00313
0.016
50
0
0.00
0.001
0
29
0.56
100
30
S
19
1.34
000
134
1,20
015
00313
0.016
61
30
0.42
1,00
35
S
19
1.011
0.15
1 15
1.09
0.06
Q0313
0016
5.7
31
0.02
1.00
S
19
0.051
000
0.051
0,15
0,00
0.0313
0-0161
17
32
0.04
1.00
S
19
0.101
0.00
010[
0,23
0,00
0.0313
0.016
2.3
33
020
2.84
34
S
251
0,48
000
0.481
0 60
0.00
00313
0 016
34
34
0.611
112
35
S
19
1.46
000
1 46
1 22
024
00313
0 016
62
36
0.681
112
21
S
19
1,63
000
1 63
j 3 t
033
00313
0 016
64
37
0221
1 00
1 S
19
0,53
0 34
087
091
0.00
0.0313
0 016
521
38
0.12
1.00
S
19
0.29
000
0.29
046
000
0.0313
0 016
3.4
39
0.03
L00
38
S
19
007
000
0.07
0 19
0.00
00313
0 016
20
40
0.03
1.00
39
S
19
007
009
0 16
032
0.001
0.0313
0.016
28
41
0.05
1.00
39
S
19
0 12
0.07
0.19
036
0001
0.0313
0.016
29
42
0,49
1.00
41
S
19
1.19
000
1•.18
110
0071
0.0313
0 016
58
43
0,68
1 00
37
S
191
1 63
000
1.63
1 35
028
0.0313
0 016
65
44
0.03
1 00
41
S
19
007
0.00
0,07
0 19
000
0.0313
0 016
2.0
0
0.00
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0
47
0.68
1 00
46
S
19
1.63
0.00
1 63
1.35
028
00313
0 016
6.5
48
035
1.00
47
S
19
0.84
0.00
084
0.89
000
00313
0.016
5.1
49
005
1.00
48
S
19
0 12
0.00
0.12
0,26
000
00313
0.016
25
51
023
1.00
50
S
19
0.55
0.00
0551
0.69
0.00
0,0313
0.016
4.4
52
007
1.00
51
S
19
0.17
000
0 17
033
0.00
0.0313
0 016
2.8
53
0.091
1 00
52
S
191
0.22
000
022
038
0.00
0.0313
0 016
3.1
60
0-691
1.00
611
S
19
1.63
000
1 63
135
0,28
0.0313
0.0161
6.5
61
0.3¢
LOG
37
S
19
0.86
0.29
1.14
1.08
0.06
0.0313
0 016
5.7
62
0.64
1.00
37
S
19
1 54
0.00
1.54
1.30
0.23
00313
0 016
64
0
0.00
000
0
66
0,66
100
65
S
19
1 58
0 00
1.58
1 33
026
00313
0 016
6.5
42A
0.37
100
41
S
19
089
0 00
0-891
093
006
00313
0 016
52
46A
045
1.00
46
S
19
1 08
0001
1 081
1 05
003
00313
0.016
5.6
Inlets at Sag
INLET
DRAINAGE
SURFQ
BYPASS Q
SURF Q
SLOPE
SINGLE="S"
DEPf6
#
AREA
SUB
RECEIVED
TOTAL
TRANS
DOUBLE ="D"
(D)
SPREAD
REMARKS
1
0.68
163
000
163
00313
S
017
549
1/2TRAVEL LANE +
2
039
094
000
094
00313
S
0.12
379
]'OFGUTTER =6.5'
5
0.66
1 58
000
1 58
00313
S
0 17
5 38
MAX SPREAD
10
0.47
113
0 18
1.31
00313
S
0 15
473
14
0.57
1.371
000
1 37
003131
S
0 15
4881
21
0371
089
033
1.21
003131
S
0 14
4.51
25
0-741
1.78
000
1 78
0.0313
S
0 18
5811
26
0 741
1 78
000
1.78
0,03 13
S
0 18
581
13
0.811
1 94
0.00
1.94
0.0313
S
0 19
6,17
35
0.57
137
031
168
0.0313
S
0 17
5.59
46
0.68
1,63
0.03
1 66
0.0313
S
017
5.56
50
021
0.50
0.00
0.501
0.0313
S
009
2 51
0
0
0.00
0
0.00
65
068
1.63
026
1 89
0,0313
S
019
6.06
67
0.82
1 97
000
1.97
0 0313
S
0 19
6,22
47
082
L97
000
1 97
0 0313
S
0 191
6221

U* LET SPREAD CHART
Version 9.27.12
WKD
Intensity: 4.00
C 0.60
Crown: 0.0313 Input 0.0208 or 0.0313
YARBROUGH-WILLIAMS & HOULE, INC.
Planning • Surveying • Engineering
Name: GLENNS II
= input cells
730 Windsor Oak Ct.
Charlotte, NC 28273
P.O. Box 1198
Pineville NC 28134
Fax: [phone]
Ph.704-556-1990
Date: I February 17, 2023

DROP INLET
CALCULATIONS

STANDARD DRDP INLET GRATE TYPE
6 SLAB TYPE - DEPTH CALCULATION
PROJECT:
GLENNS II
1
YAR81ROUGH-WILLIAMS&ASSOC INC
DATE:
2117123
704.556.189p
%1 AilIR!
GRATE
GRATE.
ORATE,
GRATE
GRATV
51AJ1
SLAB
G&FTa
ST MTLIW,'
GINI}:
DRAINAGE
RUNOFF
WMMITY
51JRFALI:
❑PI•]11HII
WEIR
ORIFICE
WEIR
CONTROLLING
Wilt
va!IR
TYPP
AREA AC
COEFF C
ARFA S . FT
MR"A TER
DEPTH
DEPTH
DRPTH
PI.121MF: n+R
11M•III
45
SINGLE
GRATE
0.45
0.66
8.21
244
366
11.08
0.02
0.16
016
76A
SINGLE
GRATE
0.51
0.85
9,21
2.76
366
11.08
0.02
0.18
018
100
BINDLE
SLAB
3.79
0.66
121
20,54
11.50
0.66
101
SINGLE
GRATE
001
0.66
81i
0-05
3 66
1108
0.00
0.01
0.01
#VALUEi
p,pp
000
#VALUE!
*VALUE
#VALUEi
KVALUM
000
0,0p 1
0.00 i
#DIVIDI
I # IVI01 j
#DIV/ON I

RIP RAP APRON
CALCULATIONS

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Figure 8-1
8-5 YARBROUGH-WILLIAMS & HOME, INC.
730 WINDSOR OAK COURT CHARLOTTE, NC 28273
P.O. BOX 1198 PINEVILLE, NC 28134
PHONE [phone] FAX [phone]

\Ij,t -� ?.r,) S> -1+- ?,-
J03
Outlet W = Do + Lapipediameter
�T it ester S 0.5Do - -80
1�1 7n
toy
e�g�ro4 PQ 60
.50
Curves may not be extrapolated.
1 50 100 200 Soo
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�`N DIA- (,1P ?,W
L= t , Q, =1 '
Design Of Riprap apron Under Minimum Tailwater Conditions
Figure 8-1
YARBROUCIH-WILLiAMS & HOULE, INC.
8-5 730 WINDSOR OAK COURT CHARLOTTE, NG 28273
p,O. BOX 1198 PINEVILLE, NG 28134
PHONE VO4) 556-1990 FAX VO4) 556-0505
r
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1000

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8_5 YARBROUGH-WILLIAMS & HOULE, INC.
730 WINDSOR OAK COURT CHARLOTTE, NC 28273
P.O. BOX 1198 PINEVILLE, NC 28134
PHONE [phone] FAX [phone]