20160191_R-2250_96in_extension_hy8_20190509

HY-8 Culvert Analysis Report
R-2250 Greenville Bypass
96" Culvert Extension
(Analyzed as an 84" Culvert)
55+26 —Y8-

Crossing Discharge Data
Discharge Selection Method: Recurrence
USGS Urban Regression Equations-USGS SIR 2014-5030, Version 1.1 March 2014
DRNAREA = 0.19 SQ. Mi.
IMPAREA = 10%
124H50YR = 8.5 in/hr
Hydrologic Region 4
Q2 = 26.3(DRNAREA)^0.5908 * 10^(0.0173*IMPAREA) * 10^(0.0515*124H50Y)
Q5 = 40.6(DRNAREA)^0.5958 * 10"(0.0125*IMPAREA) * 10"(0.0623*124H50Y)
Q10 = 51.8(DRNAREA)^0.6004 " 10"(0.0101*IMPAREA) * 10^(0.0666*124H50Y)
Q25 = 67.1(DRNAREA)"0.6067 * 10"(0.0075*IMPAREA) * 10^(0.0708*124H50Y)
Q50 = 78.4(DRNAREA)^0.6111 * 10"(0.0058*IMPAREA) * 10^(0.0738*124H50Y)
Q100 = 90.5(DRNAREA)^0.6154 * 10"(0.0043*IMPAREA) * 10"(0.0762*124H50Y)
Q200 = 103(DRNAREA)"0.6201 * 10^(0.0029*IMPAREA) * 10"(0.0785*124H50Y)
Q500 = 119(DRNAREA)^0.6261 * 10^(0.0012*IMPAREA)'' 10"(0.0.0813*124H50Y)
Q2= 40 cfs
Say= 40 cfs
Q5= 68 cfs
Say= 70 cfs
Q 10= 89 cfs
Say= 90 cfs
Q25= 117 cfs
Say= 120 cfs
Q50= 138 cfs
Say= 140 cfs
Q100= 160 cfs
Say= 160 cfs
Q200= 183 cfs
Say= 180 cfs
Q500= 213 cfs
Say= 210 cfs

Table 1 - Summary of Culvert Flows at Crossing: -Y8- 55+26
Headwater
Elevation (ft)
Discharge Names
Total Discharge
(cfs)
Extension 96in Culvert
Discharge (cfs)
Roadway
Discharge (cfs)
Iterations
59.57
2 year
40.00
40.00
0.00
1
60.51
5 year
70.00 1
70.00
0.00
1
61.04
10 year
90.00
90.00
0.00
1
61.78
25 year
120.00
120.00
0.00
1
62.24
50 year
140.00
140.00
0.00
1
62.69
100 year
160.00
160.00
0.00
1
63.15
200 year
180.00
180.00
0.00
1
63.86
500 year
210.00
210.00
0.00
1
66.00
Overtopping
398.52
398.52
0.00
Overtopping

Crossing - -Y8- 55+26, Design Discharge - 140.0 cfs
Culvert - 96in Culvert Extension, Culvert Discharge - 140.0 cfs
.m
m
c 62
O
260
w
58
0 100 200 300
Station (ft)

Table 2 - Culvert Summary Table: 96in Culvert Extension
Discharge
Names
Total
Discharge
(cfs)
Culvert
Discharge
(cfs)
Headwater
Elevation
(ft)
Inlet
Control
Depth (ft)
Outlet
Control
Depth (ft)
Flow
Type
Normal
Depth (ft)
Critical
Depth (ft)
Outlet
Depth (ft)
ter
D
Depth (ft)
Depth
Outlet
Velocity
(ft/s)
Tailwater
Velocity
Ps)
2 year
40.00
40.00
59.57
2.206
3.072
8-H2t
-1.000
1.598
1.657
1.637
5.744
2.052
5 year
70.00
70.00
60,51
2.945
4.008
8-H2t
-1.000
2-132
2.188
2.168
6-811
2391
10 year
90.00
90.00
1 61.04
3.375
1 4.542
8-H2t
-1.000
1 2.426
2.471
1 2.451
7,410
2.558
25 year
120.00
120.00
61.78
3 966
5.276
8-H2t
-1.000
2.819
2 835
2.815
8.211
2.760
50 year
140.00
140,00
62.24
4.337
5.739
8-1-12c
-1.000
3.057
3.057
3.028
8.668
2.874
100 year
160.00
160.00
62.69
4.694
6.194
8-H2c
-1.000
3.282
3.282
3.224
9.030
2.976
200 year
180.00
180.00
63.15
5,039
6,650
8-1-12c
-1.000
3,490
3.490
3,406
9.390
3.069
500 year
210.00
210.00
63.86
5.543
7.361
8-H2c
-1,000
3,780
3.780
3.658
9.906
3.194
Straight Culvert
Inlet Elevation (invert): 56.50 ft, Outlet Elevation (invert): 56 48 It
Culvert Length: 264 00 ft, Culvert Slope: 0 0001
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Site Data - 96in Culvert Extension
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 ft
Inlet Elevation: 56.50 ft
Outlet Station: 264.00 ft
Outlet Elevation: 56.48 ft
Number of Barrels: 1
Culvert Data Summary - 96in Culvert Extension
Barrel Shape: Circular
Barrel Diameter: 8.00 ft (Analyzed as 7' Diameter Opening since culvert is buried 1.0')
Barrel Material: Corrugated Steel
Embedment: 0.00 in
Barrel Manning's n: 0.0240
Culvert Type: Straight
Inlet Configuration: Square Edge with Headwall
Inlet Depression: NONE

Table 3 - Downstream Channel Rating Curve (Crossing: -Y8- 55+26)
Flow (cfs)
Water Surface
Elev (ft)
Depth (ft)
Velocity (ft/s)
Shear (psf)
Froude Number
40.00
58.14
1.64
2.05
0.20
0.34
70.00
58.67
2.17
2.39
0.27
0.35
90.00
58.95
2.45
2.56
0.31
0.35
120.00
59.31
2.81
2.76
0.35
0.36
140.00
59.53
3.03
2.87
0.38
0.36
160.00
59.72
3.22
2.98
0.40
0.37
180.00
59.91
3.41
3.07
0.43
0.37
210.00
60.16
3.66
3.19
0.46
0.37
Tailwater Channel Data - -Y8- 55+26
Tailwater Channel Option: Trapezoidal Channel
Bottom Width: 7.00 ft
Side Slope (H:V): 3.00 (_ 1)
Channel Slope: 0.0020
Channel Manning's n: 0.0350
Channel Invert Elevation: 56.50 ft
Roadway Data for Crossing: -Y8- 55+26
Roadway Profile Shape: Constant Roadway Elevation
Crest Length: 100.00 ft
Crest Elevation: 66.00 ft
Roadway Surface: Paved
Roadway Top Width: 64.00 ft