SW6240205_Design Calculations_20240718 (2)

Attachment B--Hydraulic Calculations
Hoke County High School Time of Concentration and Intensity Derivations:
K* (L^3/H)^0.385
Hydrograph formulation Kirpich's Equation: Tc = 128
L = 1548 Overland Hydraulic Length of watershed (ft)
H = 5 Elevation diff. along "L" (ft)
Drainage Subarea: Post to SCM 2 K = 1 Multiplier for flow path conditions
Calculated Tc= 20.32 (see HRM supp. p2-4)
Tc= 20.32 min. (use 5 as minimum)
Post Construction From Pipe Calcs
2.788 ac pavement& roof 0.95 98 =C/CN g & h are regression coeff I = g (from HRM p. 2-6)
ac roof 0.95 98 =C/CN listed in HRM supplement h + T
0 ac gravel 0.95 98 =C/CN p. 5-3 T=Tc
1.94 ac grass 0.15 30 =C/CN
4.724 1-yr 10-yr 25-yr 100-yr
Runoff Volume Estimate (SCS Curve Number Method) P (in) = 2.5 P (in) = 4.2 P (in) = 5 P (in) = 6.3
Drainage Area (ac) = 4.724 acres g = 127 g = 226 g = 271 g = 341
CN = 70.13 SCS Curve Number h = 19.6 h = 26 h = 28 h = 30
C= 0.622 Rat'I Coeff. I (in/hr) = 3.19 I (in/hr) = 4.88 I (in/hr) = 5.61 I (in/hr) = 6.78
1000 S = 4.26
S = CN 10 Peak Flow(Rational Method)
(P- 0.2*S)^2 Q (cfs) = CiA
R.O. (in) - (P + 0.8*S) Q (cfs) = 9.38 Q (cfs) = 14.34 Q (cfs) = 16.48 Q (cfs) = 19.92
Tp (min) 10.1 Tp (min) 21.1 Tp (min) 25.5 Tp (min) 31.5
1-yr 10-yr 25-yr 100-yr
I (24hr)= 0.13 I (24hr)= 0.204 I (24hr)= 0.244 I (24hr)= 0.304
Q24(cfs)= 0.382 Q24(cfs)= 0.600 Q24(cfs)= 0.717 Q24(cfs)= 0.893
R.O. (in) = 0.46 R.O.(in) = 1.47 R.O. (in) = 2.05 R.O. (in) = 3.06
R.O. (cf) = 7,884 R.O.(cf) = 25,269 R.O. (cf) = 35,096 R.O. (cf) = 52,434
Prepared 7/16/2024 Page 1

Stage-Storage Data basins
Hoke County High School
Computation of the Stage Storage Function 2.5
Contour Area Incr.Vol. Accum.Vol. Stage Zest 4th Order Polynomial
(ft) (sf) (ft"3) (ft^3) (ft) (ft) Coefficients 2 y=2E-19x°-2E-14x°+4E-10x°+5E-05x+0.0154.•• -
0 251 18,171 0.00 - 0 0.01 b 1.344E-02 ............."•....
251.20 18,682 3,685 3,685 0.2 0.20 c1 4.948E-05 1.5 -
251.40 19,193 3,788 7,473 0.4 0.40 c2 4.325E-10
251.60 19,705 3,890 11,363 0.6 0.60 c3 -2.350E-14 1 •.. -
_ 251.80 20,216 3,992 15,355 0.8 0.80 c4 2.268E-19 ,.•'`•
.1 252.00 20,728 4,094 19,449 1 1.00 ••r•
0.s -
252.20 24,001 4,473 23,922 1.2 1.20 ''�• . .
252.40 27,273 5,127 29,049 1.4 1.40
0
_ 252.60 30,546 5,782 34,831 1.6 1.60 - 10,000 20,000 30,000 40,000 50,000 60,000
252.80 33,819 6,437 41,268 1.8 1.80
2 253.00 37,092 7,091 48,359 2 2.00
18,171 =Surface area top bioretention
_ 0.5=in/hr(50%min for bioretention)
0.210 =infiltration cfs
SCM 2
stage area forebay
248 11102 bottom bioretention cell
249 13358.14
250 15714.14
251 18170.67 top bioretention cell
252 20727.73
253 37092
19,449 Storage Volume Provded
1.00 =Ponding zone(ft) 12.00 in
25.69=Drawdown time in hours
Prepared[7/16/2024] Page 2

1-yr Routing
Hoke County High School Structure Data
Not Used Peak Reduction Weir Riser(Emergency Weir)&Barrel Secondary Outlet
Routing Table(using HRM's"Chainsaw"method) Riser: Barrel: Weir: Orifice Equation: Rect Riser: Barrel: Weir
(not used) Length(ft) 0.75 Length(ft) 0.75 Width(in) 48.00
Dia.(in) 24 Dia.(in) 6 Height(ft) 0.5 Height(ft) 0.5 Length(in) 48.000 Dia.(in) 12 Cw= 3
Op(cfs)= 9.38 Inv Ele.(ft) 1,000.00 Invert(ft) 1,000.00 Inv El.(ft) 252 Invert(ft) 252 Top Ele.(ft) 252.50 Invert(ft) 248.85 Ele.(ft) 253.00
Tp(min)= 10.1 1 Cw 3.3 Cd 0.6 Cw 3.3 Cd 0.6 Cw 3.3 Cd 0.6 Length(ft) 10
Cd 0.6 Cd 0.6 Cd 0.6
dT(min)= 1.0 Suggested Time Increment(Tp/10) Weir Equation: Orifice Equation: Weir Equation: Orifice Equation: Weir Equation: Orifice Equation:
dT(min)= 1 Selected Time Increment Q=Cw"L"H^(3/2) a=Cd"A`(2"g"h)^(1/2) Q=Cw"L"H^(3/2) Q=Cd"A"(2"g"h)^(1/2) Q=Cw"L"H^(3/2) Q=Cd"A"(2`g"h)^(1/2)
b 1.344E-02
c1 4.948E-054th order polynomial coefficients
c2 4.325E-1010 used to estimate stage
c3 -2.350E-14
c4 2.268E-19
Ref.Ele.= 251 (Perm Pool)
Results:
Max.Total Outflow - cfs
Not Used - cfs
Peak Reduction Weir - cfs
Max Primary Riser - cfs
Max.Emer.W eir Outflow - cfs
Max.Water Surf.Ele. 251.39 ft
Max.Stage: 0.39 ft
Max.Storage: 7,300 cult.
`NOTE:Check Primary Riser Barrel to ensure total outflow is always less than or equal to Primary Barrel flow.
Routing Table: Computed Outflow Data:
Time
Infiltration R.O.Inflow Total Inflow Storage Wtr Surf' Stage Outflow" Not Used Peak Reduction Weir Rect.Riser Primary Ele Riser Riser Riser Riser Barrel' Control Emergency
(min) (cfs) (cfs) (cfs) (cfs) (ot) (fl) (ft) (cfs) (weir) (orifice) Barrel Control Weir (orifice) Orifice Control (weir) (orifice) Riser Control Weir
0 0.00 0.00 0.00 0.00 0.00 251.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.85 0.00 0.00
1 0.00 -0.2262 0.226 0.00 0.00 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
2 0.00 -0.2103 0.88 0.67 0.00 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
3 0.00 -0.2103 1.91 1.70 40.37 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
4 0.00 -0.2103 3.20 2.99 142.18 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.88 0.00 0.00
5 0.00 -0.2103 4.64 4.43 321.54 251.03 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.89 0.00 0.00
6 0.00 -0.2103 6.08 5.87 587.09 251.04 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.91 0.00 0.00
7 0.00 -0.2103 7.39 7.17 939.12 251.06 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.94 0.00 0.00
8 0.00 -0.2103 8.43 8.22 1369.61 251.08 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.97 0.00 0.00
9 0.00 -0.2103 9.12 8.91 1862.95 251.11 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.00 0.00
10 0.00 -0.2103 9.38 9.17 2397.48 251.13 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.04 0.00 0.00
11 0.00 -0.2103 9.19 8.97 2947.56 251.16 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.08 0.00 0.00
12 0.00 -0.2103 8.56 8.35 3486.04 251.19 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.12 0.00 0.00
13 0.00 -0.2103 7.60 7.39 3986.91 251.22 0.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.16 0.00 0.00
14 0.00 -0.2103 6.68 6.47 4430.55 251.24 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.19 0.00 0.00
15 0.00 -0.2103 5.87 5.66 4818.95 251.26 0.26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.22 0.00 0.00
16 0.00 -0.2103 5.16 4.95 5158.80 251.28 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.24 0.00 0.00
17 0.00 -0.2103 4.54 4.33 5455.97 251.29 0.29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.26 0.00 0.00
18 0.00 -0.2103 3.99 3.78 5715.64 251.31 0.31 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.28 0.00 0.00
19 0.00 -0.2103 3.51 3.30 5942.34 251.32 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.30 0.00 0.00
20 0.00 -0.2103 3.08 2.87 6140.07 251.33 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.31 0.00 0.00
21 0.00 -0.2103 2.71 2.50 6312.32 251.34 0.34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.32 0.00 0.00
22 0.00 -0.2103 2.38 2.17 6462.20 251.35 0.35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.33 0.00 0.00
23 0.00 -0.2103 2.09 1.88 6592.40 251.35 0.35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.34 0.00 0.00
24 0.00 -0.2103 1.84 1.63 6705.31 251.36 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.35 0.00 0.00
25 0.00 -0.2103 1.62 1.41 6803.02 251.36 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.36 0.00 0.00
26 0.00 -0.2103 1.42 1.21 6887.38 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.36 0.00 0.00
27 0.00 -0.2103 1.25 1.04 6959.99 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
28 0.00 -0.2103 1.10 0.89 7022.29 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
29 0.00 -0.2103 0.96 0.75 7075.51 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
30 0.00 -0.2103 0.85 0.64 7120.76 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
31 0.00 -0.2103 0.75 0.53 7159.01 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
32 0.00 -0.2103 0.65 0.44 7191.10 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
33 0.00 -0.2103 0.58 0.37 7217.77 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
34 0.00 -0.2103 0.51 0.30 7239.69 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
35 0.00 -0.2103 0.44 0.23 7257.43 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
36 0.00 -0.2103 0.39 0.18 7271.49 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
37 0.00 -0.2103 0.34 0.13 7282.32 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
38 0.00 -0.2103 0.30 0.09 7290.31 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
39 0.00 -0.2103 0.27 0.06 7295.81 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
40 0.00 -0.2103 0.23 0.02 7299.11 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
41 0.00 -0.2103 0.20 -0.01 7300.49 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
42 0.00 -0.2103 0.18 -0.03 7300.17 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
43 0.00 -0.2103 0.16 -0.05 7298.36 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
Prepared 7/16/2024 Page 3

1-yr Routing
44 0.00 -0.2103 0.14 -0.07 7295.24 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
45 0.00 -0.2103 0.12 -0.09 7290.98 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
46 0.00 -0.2103 0.11 -0.10 7285.70 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
47 0.00 -0.2103 0.09 -0.12 7279.53 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
48 0.00 -0.2103 0.08 -0.13 7272.58 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
49 0.00 -0.2103 0.07 -0.14 7264.95 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
50 0.00 -0.2103 0.06 -0.15 7256.71 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
51 0.00 -0.2103 0.06 -0.15 7247.94 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
52 0.00 -0.2103 0.05 -0.16 7238.71 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
53 0.00 -0.2103 0.04 -0.17 7229.06 251.39 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
54 0.00 -0.2103 0.04 -0.17 7219.06 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
55 0.00 -0.2103 0.03 -0.18 7208.74 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.39 0.00 0.00
56 0.00 -0.2103 0.03 -0.18 7198.14 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
57 0.00 -0.2103 0.03 -0.18 7187.30 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
58 0.00 -0.2103 0.02 -0.19 7176.24 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
59 0.00 -0.2103 0.02 -0.19 7164.99 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
60 0.00 -0.2103 0.02 -0.19 7153.58 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
61 0.00 -0.2103 0.02 -0.19 7142.02 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
62 0.00 -0.2103 0.01 -0.20 7130.33 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
63 0.00 -0.2103 0.01 -0.20 7118.53 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
64 0.00 -0.2103 0.01 -0.20 7106.63 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
65 0.00 -0.2103 0.01 -0.20 7094.64 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
66 0.00 -0.2103 0.01 -0.20 7082.58 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
67 0.00 -0.2103 0.01 -0.20 7070.45 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.38 0.00 0.00
68 0.00 -0.2103 0.01 -0.20 7058.26 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
69 0.00 -0.2103 0.01 -0.20 7046.02 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
70 0.00 -0.2103 0.00 -0.21 7033.73 251.38 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
71 0.00 -0.2103 0.00 -0.21 7021.41 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
72 0.00 -0.2103 0.00 -0.21 7009.04 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
73 0.00 -0.2103 0.00 -0.21 6996.65 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
74 0.00 -0.2103 0.00 -0.21 6984.23 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
75 0.00 -0.2103 0.00 -0.21 6971.79 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
76 0.00 -0.2103 0.00 -0.21 6959.32 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
77 0.00 -0.2103 0.00 -0.21 6946.84 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
78 0.00 -0.2103 0.00 -0.21 6934.34 251.37 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.37 0.00 0.00
Prepared 7/16/2024 Page 4

1-yr Plot
Hoke County High School
Pond Routing
10.00
1-yr
11
8.00 A
• —0—Outflow
6.00 Total Inflow
A.
N .\
`�txt.00
a
2.00
h
0.00 cs ■wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwiGW - T n.n.w. 1wlwywJ.MANOwwwwwwwwwwwwwwwwwwwwwwwww■
n 10 20 30 40 50 .1 S 80 90
-2.00
Time (min)
Prepared by Kevin Lindsay 7/16/2024 Page 5

10-yr Routing
Hoke County High School Structure Data
Not Used Peak Reduction Wok Riser(Emergency Weir)&Barrel Secondary Outlet
Rotting Table(using HRM's"Chainsan"'method) Riser: Barrel: Weir: Orifice Equation: Rect Riser: Barrel: Weir
(not used) Length(ft) 0.75 Length(ft) 0.75 Width(n) 48.00
Dia.(In) 24 Dia.(In) 6 Height(ft) 0.5 Height(ft) 0.5 L90301)In) 48.000 Dia.(In) 12 Cw= 3
Qp(cis). 14.34 10 Inv Ele.(ft) 1,000.00 Invert(ft) 1,000.00 Inv El.(ft) 252 Invert(ft) 252 Top Ele.(ft) 252.50 Invert(ft) 248.85 Ele.(ft) 253.00
Tp(min)= 21.1 Cw 3.3 Cd 0.6 Cw 3.3 Cd 0.6 Cw 3.3 Cd 0.6 Length(ft) 10
Cd 0.6 Cd 0.6 Cd 0.6
dT(min)= 2 Suggested Time Increment(Tp/10) Weir Equation: Orice Equation: Weir Equation: Orice Equation: Weir Equation: Orifice Equation:
dT(min)= 1 Selected Time Increment
O=Dw'L'H"(3l2) Q=Cd'A'(2'9 hN(1l2) Q=Cw'L'H"(3l2) Q=Cd'A')2'9 hN(1l2) Q=Cw'L'H"(3l2) O=Cd'A'(2'9'hN(1/2)
b 1.344E-02
c1 4.948E-05 4th order polynomial coefficients
c2 4.325E-14
c3 -2.3509-14 used to estimate stage
c4 2.268E-19
Ref.Ele.= 251 (Penn Pool)
Results:
Max Total Outflow 0.19 cfs
Not Used - cfs
Peak Reduction Weir 0.19 cfs
Max Pnmary Riser - cfs
Max Emer.W ok Outflow - cfs
Max Water Surf.Ele. 252.18 ft
Max Stage: 1.18 ft
Max Storage: 23,596 cu.ft.
Rating Table: Computed Outflow Data:
Inflltrallon Wbsud. net Used Peak Reduction Weir Rect.Ricer PrimaryTotalStorageOutflow' Emergency
Ele (welt) Riser (welt) Riser Riser Banal' Control
(min) (cis) (cis) (cfs) (cfs) (� (%) (%) (cfs) (weir) (orrice) Barrel Control Weir (orifice) Orifice Control (weir) (orHice) COMroI Weir
0 0.00 0.00 0.00 0.00 - 251.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.85 0.00 0.00
1 0.00 -0.08 0.08 0.00 - 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
2 0.00 -0.2103 0.32 0.10 - 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
3 0.00 -0.2103 0.70 0.49 6 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
4 0.00 -0.2103 1.23 1.02 36 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
5 0.00 -0.2103 1.89 1.68 97 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.88 0.00 0.00
6 0.00 -0.2103 2.67 2.46 198 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.88 0.00 0.00
7 0.00 -0.2103 3.55 3.34 346 251.03 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.89 0.00 0.00
8 0.00 -0.2103 4.51 4.30 546 251.04 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.91 0.00 0.00
9 0.00 -0.2103 5.52 5.31 804 251.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.93 0.00 0.00
10 0.00 -0.2103 6.57 6.36 1,123 251.07 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.95 0.00 0.00
11 0.00 -0.2103 7.64 7.43 1,505 251.09 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.98 0.00 0.00
12 0.00 -0.2103 8.70 8.49 1,950 251.11 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.01 0.00 0.00
13 0.00 -0.2103 9.72 9.51 2,460 251.14 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.05 0.00 0.00
14 0.00 -0.2103 10.68 10.47 3,030 251.17 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.09 0.00 0.00
15 0.00 -0.2103 11.57 11.36 3,658 251.20 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.13 0.00 0.00
16 0.00 -0.2103 12.36 12.15 4,340 251.23 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.18 0.00 0.00
17 0.00 -0.2103 13.04 12.83 5,069 251.27 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.24 0.00 0.00
18 0.00 -0.2103 13.58 13.37 5,838 251.31 0.31 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.29 0.00 0.00
19 0.00 -0.2103 13.99 13.78 6,641 251.35 0.35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.35 0.00 0.00
20 0.00 -0.2103 14.24 14.03 7,467 251.40 0.40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.40 0.00 0.00
21 0.00 -0.2103 14.34 14.13 8,309 251.44 0.44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.46 0.00 0.00
22 0.00 -0.2103 14.28 14.07 9,157 251.49 0.49 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.52 0.00 0.00
23 0.00 -0.2103 14.06 13.85 10,001 251.53 0.53 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.58 0.00 0.00
24 0.00 -0.2103 13.69 13.48 10,832 251.57 0.57 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.63 0.00 0.00
25 0.00 -0.2103 13.18 12.97 11,641 251.62 0.62 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.68 0.00 0.00
26 0.00 -0.2103 12.53 12.32 12,419 251.65 0.85 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.73 0.00 0.00
27 0.00 -0.2103 11.81 11.60 13,158 251.69 0.69 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.78 0.00 0.00
28 0.00 -0.2103 11.10 10.89 13,854 251.73 0.73 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.82 0.00 0.00
29 0.00 -0.2103 10.44 10.23 14,507 251.76 0.76 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.86 0.00 0.00
30 0.00 -0.2103 9.82 9.61 15,121 251.79 0.79 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.90 0.00 0.00
31 0.00 -0.2103 9.23 9.02 15,697 251.82 0.82 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.93 0.00 0.00
32 0.00 -0.2103 8.68 8.47 16,238 251.85 0.85 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.97 0.00 0.00
33 0.00 -0.2103 8.16 7.95 16,747 251.87 0.87 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.99 0.00 0.00
34 0.00 -0.2103 7.67 7.46 17,224 251.89 0.89 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.02 0.00 0.00
35 0.00 -0.2103 7.22 7.00 17,671 251.92 0.92 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.05 0.00 0.00
36 0.00 -0.2103 6.78 6.57 18,092 251.94 0.94 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.07 0.00 0.00
37 0.00 -0.2103 6.38 6.17 18,486 251.95 0.95 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.09 0.00 0.00
38 0.00 -0.2103 6.00 5.79 18,856 251.97 0.97 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.11 0.00 0.00
39 0.00 -0.2103 5.64 5.43 19,204 251.99 0.99 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.13 0.00 0.00
40 0.00 -0.2103 5.30 5.09 19,529 252.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 6.15 0.00 0.00
41 0.00 -0.2103 4.99 4.78 19,835 252.02 1.02 0.01 0.00 0.00 0.00 0.00 0.01 0.23 0.01 0.01 0.00 0.00 0.01 6.17 0.01 0.00
42 0.00 -0.2103 4.69 4.48 20,121 252.03 1.03 0.01 0.00 0.00 0.00 0.00 0.01 0.31 0.01 0.01 0.00 0.00 0.01 6.18 0.01 0.00
43 0.00 -0.2103 4.41 4.20 20,389 252.04 1.04 0.02 0.00 0.00 0.00 0.00 0.02 0.37 0.02 0.02 0.00 0.00 0.02 6.19 0.02 0.00
44 0.00 -0.2103 4.15 3.94 20,640 252.05 1.05 0.03 0.00 0.00 0.00 0.00 0.03 0.42 0.03 0.03 0.00 0.00 0.03 6.21 0.03 0.00
45 0.00 -0.2103 3.90 3.69 20,874 252.06 1.08 0.04 0.00 0.00 0.00 0.00 0.04 0.46 0.04 0.04 0.00 0.00 0.04 6.22 0.04 0.00
46 0.00 -0.2103 3.67 3.46 21,093 252.07 1.07 0.05 0.00 0.00 0.00 0.00 0.05 0.49 0.05 0.05 0.00 0.00 0.05 6.23 0.05 0.00
47 0.00 -0.2103 3.45 3.24 21,297 252.08 1.08 0.059 0.00 0.00 0.00 0.00 0.06 0.52 0.06 0.06 0.00 0.00 0.06 6.24 0.06 0.00
48 0.00 -0.2103 3.24 3.03 21,488 252.09 1.09 0.068 0.00 0.00 0.00 0.00 0.07 0.55 0.07 0.07 0.00 0.00 0.07 6.25 0.07 0.00
49 0.00 -0.2103 3.05 2.84 21,666 252.10 1.10 0.078 0.00 0.00 0.00 0.00 0.08 0.57 0.08 0.08 0.00 0.00 0.08 6.26 0.08 0.00
50 0.00 -0.2103 2.87 2.66 21,831 252.11 1.11 0.086 0.00 0.00 0.00 0.00 0.09 0.59 0.09 0.09 0.00 0.00 0.09 6.27 0.09 0.00
51 0.00 -0.2103 2.69 2.48 21,985 252.11 1.11 0.09 0.00 0.00 0.00 0.00 0.09 0.61 0.09 0.09 0.00 0.00 0.09 6.28 0.09 0.00
52 0.00 -0.2103 2.53 2.32 22,129 252.12 1.12 0.10 0.00 0.00 0.00 0.00 0.10 0.62 0.10 0.10 0.00 0.00 0.10 6.28 0.10 0.00
53 0.00 -0.2103 2.38 2.17 22,262 252.13 1.13 0.11 0.00 0.00 0.00 0.00 0.11 0.64 0.11 0.11 0.00 0.00 0.11 6.29 0.11 0.00
54 0.00 -0.2103 2.24 2.03 22,386 252.13 1.13 0.12 0.00 0.00 0.00 0.00 0.12 0.65 0.12 0.12 0.00 0.00 0.12 6.30 0.12 0.00
55 0.00 -0.2103 2.11 1.90 22,501 252.14 1.14 0.12 0.00 0.00 0.00 0.00 0.12 0.67 0.12 0.12 0.00 0.00 0.12 6.30 0.12 0.00
56 0.00 -0.2103 1.98 1.77 22,607 252.14 1.14 0.13 0.00 0.00 0.00 0.00 0.13 0.68 0.13 0.13 0.00 0.00 0.13 6.31 0.13 0.00
57 0.00 -0.2103 1.86 1.65 22,705 252.14 1.14 0.14 0.00 0.00 0.00 0.00 0.14 0.69 0.14 0.14 0.00 0.00 0.14 6.31 0.14 0.00
58 0.00 -0.2103 1.75 1.54 22,796 252.15 1.15 0.14 0.00 0.00 0.00 0.00 0.14 0.70 0.14 0.14 0.00 0.00 0.14 6.32 0.14 0.00
59 0.00 -0.2103 1.65 1.44 22,880 252.15 1.15 0.15 0.00 0.00 0.00 0.00 0.15 0.71 0.15 0.15 0.00 0.00 0.15 6.32 0.15 0.00
Prepared 7/16/2024 Page 6

10-yr Routing
60 0.00 -0.2103 1.55 1.34 22,957 252.16 1.16 0.15 WOO 0.00 0.00 0.00 0.15 0.71 0.15 0.15 r 0.00 0.00 0.15 6.32 0.15 0.00
61 0.00 -0.2103 1.46 1.25 23,029 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.22 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
62 0.00 -0.2103 1.37 1.16 23,094 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.73 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
63 0.00 -0.2103 1.29 1.08 23,154 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.73 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
64 0.00 -0.2103 1.21 1.00 23,208 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
65 0.00 -0.2103 1.14 0.93 23,258 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
66 0.00 -0.2103 1.07 0.86 23,304 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.75 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
67 0.00 -0.2103 1.01 0.80 23,345 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.34 0.18 0.00
68 0.00 -0.2103 0.95 0.74 23,382 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
69 0.00 -0.2103 0.89 0.68 23,415 252.18 1.18 0.18 0.00 0.00 0.00 0.00 0.18 0.76 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
70 0.00 -0.2103 0.84 0.63 23,445 252.18 1.18 0.18 0.00 0.00 0.00 0.00 0.18 0.76 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
71 0.00 -0.2103 0.79 0.58 23,472 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.76 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
72 0.00 -0.2103 0.74 0.53 23,495 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.76 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
73 0.00 -0.2103 0.70 0.49 23,516 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
74 0.00 -0.2103 0.65 0.44 23,533 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
75 0.00 -0.2103 0.61 0.40 23,549 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
76 0.00 -0.2103 0.58 0.37 23,561 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
77 0.00 -0.2103 0.54 0.33 23,572 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
78 0.00 -0.2103 0.51 0.30 23,580 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
79 0.00 -0.2103 0.48 0.27 23,587 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
80 0.00 -0.2103 0.45 0.24 23,591 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.36 0.19 0.00
81 0.00 -0.2103 0.42 0.21 23,594 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.36 0.19 0.00
82 0.00 -0.2103 0.40 0.19 23,596 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.36 0.19 0.00
83 0.00 -0.2103 0.38 0.17 23,595 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.36 0.19 0.00
84 0.00 -0.2103 0.35 0.14 23,594 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.36 0.19 0.00
85 0.00 -0.2103 0.33 0.12 23,591 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.36 0.19 0.00
86 0.00 -0.2103 0.31 0.10 23,586 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
87 0.00 -0.2103 0.29 0.08 23,581 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
88 0.00 -0.2103 0.28 0.07 23,574 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
89 0.00 -0.2103 0.26 0.05 23,567 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
90 0.00 -0.2103 0.24 0.03 23,558 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
91 0.00 -0.2103 0.23 0.02 23,548 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
92 0.00 -0.2103 0.22 0.01 23,538 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
93 0.00 -0.2103 0.20 -0.01 23,527 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
94 0.00 -0.2103 0.19 -0.02 23,515 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.77 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
95 0.00 -0.2103 0.18 -0.03 23,503 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.76 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
96 0.00 -0.2103 0.17 -0.04 23,490 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.76 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
97 0.00 -0.2103 0.16 -0.05 23,476 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.76 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
98 0.00 -0.2103 0.15 -0.06 23,462 252.18 1.18 0.19 0.00 0.00 0.00 0.00 0.19 0.76 0.19 0.19 0.00 0.00 0.19 6.35 0.19 0.00
99 0.00 -0.2103 0.14 -0.07 23,447 252.18 1.18 0.18 0.00 0.00 0.00 0.00 0.18 0.76 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
100 0.00 -0.2103 0.13 -0.08 23,432 252.18 1.18 0.18 0.00 0.00 0.00 0.00 0.18 0.76 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
101 0.00 -0.2103 0.12 -0.09 23,416 252.18 1.18 0.18 0.00 0.00 0.00 0.00 0.18 0.76 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
102 0.00 -0.2103 0.12 -0.09 23,400 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.76 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
103 0.00 -0.2103 0.11 -0.10 23,383 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.35 0.18 0.00
104 0.00 -0.2103 0.10 -0.11 23,367 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.34 0.18 0.00
105 0.00 -0.2103 0.10 -0.11 23,349 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.34 0.18 0.00
106 0.00 -0.2103 0.09 -0.12 23,332 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.34 0.18 0.00
107 0.00 -0.2103 0.09 -0.12 23,314 252.17 1.17 0.18 0.00 0.00 0.00 0.00 0.18 0.75 0.18 0.18 0.00 0.00 0.18 6.34 0.18 0.00
108 0.00 -0.2103 0.08 -0.13 23,296 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.75 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
109 0.00 -0.2103 0.08 -0.13 23,278 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
110 0.00 -0.2103 0.07 -0.14 23,260 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
111 0.00 -0.2103 0.07 -0.14 23,241 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
112 0.00 -0.2103 0.06 -0.15 23,222 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
113 0.00 -0.2103 0.06 -0.15 23,203 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.74 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
114 0.00 -0.2103 0.06 -0.15 23,184 252.17 1.17 0.17 0.00 0.00 0.00 0.00 0.17 0.73 0.17 0.17 0.00 0.00 0.17 6.34 0.17 0.00
115 0.00 -0.2103 0.05 -0.16 23,165 252.16 1.18 0.17 0.00 0.00 0.00 0.00 0.17 0.73 0.17 0.17 0.00 0.00 0.17 6.33 0.17 0.00
116 0.00 -0.2103 0.05 -0.16 23,145 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.73 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
117 0.00 -0.2103 0.05 -0.16 23,126 252.16 1.18 0.16 0.00 0.00 0.00 0.00 0.16 0.73 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
118 0.00 -0.2103 0.04 -0.17 23,106 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.73 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
119 0.00 -0.2103 0.04 -0.17 23,086 252.16 1.18 0.16 0.00 0.00 0.00 0.00 0.16 0.73 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
120 0.00 -0.2103 0.04 -0.17 23,067 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.72 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
121 0.00 -0.2103 0.04 -0.17 23,047 252.16 1.18 0.16 0.00 0.00 0.00 0.00 0.16 0.72 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
122 0.00 -0.2103 0.03 -0.18 23,027 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.72 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
123 0.00 -0.2103 0.03 -0.18 23,007 252.16 1.18 0.16 0.00 0.00 0.00 0.00 0.16 0.72 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
124 0.00 -0.2103 0.03 -0.18 22,987 252.16 1.16 0.15 0.00 0.00 0.00 0.00 0.15 0.72 0.15 0.15 0.00 0.00 0.15 6.33 0.15 0.00
125 0.00 -0.2103 0.03 -0.18 22,967 252.16 1.18 0.15 0.00 0.00 0.00 0.00 0.15 0.71 0.15 0.15 0.00 0.00 0.15 6.33 0.15 0.00
126 0.00 -0.2103 0.03 -0.18 22,947 252.16 1.16 0.15 0.00 0.00 0.00 0.00 0.15 0.71 0.15 0.15 0.00 0.00 0.15 6.32 0.15 0.00
127 0.00 -0.2103 0.03 -0.19 22,927 252.15 1.15 0.15 0.00 0.00 0.00 0.00 0.15 0.71 0.15 0.15 0.00 0.00 0.15 6.32 0.15 0.00
128 0.00 -0.2103 0.02 -0.19 22,906 252.15 1.15 0.15 0.00 0.00 0.00 0.00 0.15 0.71 0.15 0.15 0.00 0.00 0.15 6.32 0.15 0.00
129 0.00 -0.2103 0.02 -0.19 22,886 252.15 1.15 0.15 0.00 0.00 0.00 0.00 0.15 0.71 0.15 0.15 0.00 0.00 0.15 6.32 0.15 0.00
130 0.00 -0.2103 0.02 -0.19 22,866 252.15 1.15 0.15 0.00 0.00 0.00 0.00 0.15 0.70 0.15 0.15 0.00 0.00 0.15 6.32 0.15 0.00
131 0.00 -0.2103 0.02 -0.19 22,846 252.15 1.15 0.87 0.00 0.00 0.00 0.00 0.15 0.70 0.15 0.87 0.00 0.00 0.87 6.32 0.87 0.00
132 0.00 -0.2103 0.02 -0.19 22,782 252.15 1.15 0.85 0.00 0.00 0.00 0.00 0.14 0.70 0.14 0.85 0.00 0.00 0.85 6.32 0.85 0.00
133 0.00 -0.2103 0.02 -0.19 22,720 252.15 1.15 0.83 0.00 0.00 0.00 0.00 0.14 0.69 0.14 0.83 0.00 0.00 0.83 6.31 0.83 0.00
134 0.00 -0.2103 0.02 -0.19 22,659 252.14 1.14 0.80 0.00 0.00 0.00 0.00 0.13 0.68 0.13 0.80 0.00 0.00 0.80 6.31 0.80 0.00
135 0.00 -0.2103 0.02 -0.20 22,599 252.14 1.14 0.78 0.00 0.00 0.00 0.00 0.13 0.68 0.13 0.78 0.00 0.00 0.78 6.31 0.78 0.00
136 0.00 -0.2103 0.01 -0.20 22,540 252.14 1.14 0.76 0.00 0.00 0.00 0.00 0.13 0.67 0.13 0.76 0.00 0.00 0.76 6.30 0.76 0.00
137 0.00 -0.2103 0.01 -0.20 22,483 252.14 1.14 0.74 0.00 0.00 0.00 0.00 0.12 0.66 0.12 0.74 0.00 0.00 0.74 6.30 0.74 0.00
138 0.00 -0.2103 0.01 -0.20 22,427 252.13 1.13 0.72 0.00 0.00 0.00 0.00 0.12 0.66 0.12 0.72 0.00 0.00 0.72 6.30 0.72 0.00
139 0.00 -0.2103 0.01 -0.20 22,372 252.13 1.13 0.70 0.00 0.00 0.00 0.00 0.12 0.65 0.12 0.70 0.00 0.00 0.70 6.30 0.70 0.00
140 0.00 -0.2103 0.01 -0.20 22,318 252.13 1.13 0.68 0.00 0.00 0.00 0.00 0.11 0.65 0.11 0.68 0.00 0.00 0.68 6.29 0.68 0.00
141 0.00 -0.2103 0.01 -0.20 22,265 252.13 1.13 0.66 0.00 0.00 0.00 0.00 0.11 0.64 0.11 0.66 0.00 0.00 0.66 6.29 0.66 0.00
142 0.00 -0.2103 0.01 -0.20 22,213 252.12 1.12 0.64 0.00 0.00 0.00 0.00 0.11 0.63 0.11 0.64 0.00 0.00 0.64 6.29 0.64 0.00
143 0.00 -0.2103 0.01 -0.20 22,163 252.12 1.12 0.63 0.00 0.00 0.00 0.00 0.10 0.63 0.10 0.63 0.00 0.00 0.63 6.29 0.63 0.00
144 0.00 -0.2103 0.01 -0.20 22,113 252.12 1.12 0.61 0.00 0.00 0.00 0.00 0.10 0.62 0.10 0.61 0.00 0.00 0.61 6.28 0.61 0.00
145 0.00 -0.2103 0.01 -0.20 22,064 252.12 1.12 0.59 0.00 0.00 0.00 0.00 0.10 0.62 0.10 0.59 0.00 0.00 0.59 6.28 0.59 0.00
146 0.00 -0.2103 0.01 -0.20 22,016 252.11 1.11 0.58 0.00 0.00 0.00 0.00 0.10 0.61 0.10 0.58 0.00 0.00 0.58 6.28 0.58 0.00
Prepared 7/16/2024 Page

10-yr Plot
Hoke County High School
Pond Routing
16.00
10-yr
14.00 -=='
Ak
12.00
.\
•\ Outflow
10.00 —A—Total Inflow
di
.\
8.00
11
.\
a6.00
IA
4.00
2.00
,.
A _
M.U•000UUUUUN nnnnnlllOOMM IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
b 20 40 60 80 100 120 140
-2.00 Time (min)
Prepared by Kevin Lindsay 7/16/2024 Page 8

100-yr Routing
Hoke County High School Structure Data
Not Used Peak Reduction Weir Riser(Emergency Weir)8 Barrel Secondary Outlet
Routing Table(using HRM's"Chainsew"method) Riser Banal: Weir: Orifice Equation: Rest Ricer Barrel: Weir
(not used) Length(ft) 0.75 Length(ft) 0.75 Width(in) 48.00
Dia.(in) 24 Dia.(in) 8 Height(ft) 0.5 Height(ft) 0.5 Length(in) 48.000 Dia.(in) 12 Ow= 3
Pp(cfs)= 19.92 100 Inv Ele.(ft) 1,000.00 Invert(ft) 1,000.00 Inv El.(ft) 252 Invert(ft) 252 Top Ele.(fl) 252.50 Invert(ft) 248.85 Ele.(ft) 253.00
Tp(min). 31.5 0ev 3.3 Cd 0.6 0ev 3.3 Cd 0.6 Cw 3.3 Cd 0.6 Lengtie(ft) 10
Cd 0.6 Cd 0.6 Cd 0.6
dT(min)= 3 Suggested Time Increment(Tp/10) War Equation: Orifice Equation: War Equation: Orifice Equation: War Equation: Orifice Equation:
dT(min)= 1 Selected Time Increment Q=Cw1L•H^(3)2) Q=Cd•A•(2.9ehy(112) Q=Cw'L•H^(3)2) Q=Cd•A•(2.911)4(112) Q=Cw1L•H4(3l2) Q=Cd•A'(r9'h)4(1)2)
b 1.344E-02
c1 4.948E-05 4th order polynomial coefficients
c2 4.325E-10
3 -2.350E-10 used to estimate stage
04 2.268E-19
Ref.Ele.= 251 (Penn Pod)
Results:
Max Total Outflow 5.86 cfs
Not Used - cfs
Peak Reduction Weir 1.21 cfs
Max Primary Riser 4.65 cfs
Max.Emer.Weir Outflow - cfs
Max Wets Surf.Ele. 252.70 ft
Max Stage: 1.70 ft
Max.Storage: 37,885 cu.ft.
'NOTE:Check Primary Riser Barrel to ensure total outflow is always less then or equal to Primary Barrel flow.
Routing Table: I Computed Outflow Data:
Time
Infileation R.O.Inflow Total inflow Sto Stage out„ Emergen
Wtr Surf. Not Used Peak Reduction Weir Red.Riser Primary
rage co
Ele Riser
Riser Rise) Riser Riser Bann• Control
(min) (cfs) (cfs) (cfs) (cfs) (on (ft) (fl) (cfs) (weir) (orifice) Barrel Control War (orifice, Orifice Control (war) (orifice) Control Well
0 0.00 0.00 0.00 0.00 0.00 251.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.85 0.00 0.00
1 0.00 -0.05 0.05 0.00 0.00 251.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.85 0.00 0.00
2 0.00 -0.2103 0.20 -0.01 0.00 251.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.85 0.00 0.00
3 0.00 -0.2103 0.44 0.23 -0.81 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
4 0.00 -0.2103 0.78 0.57 13.04 251.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
5 0.00 -0.2103 1.21 1.00 47.19 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.87 0.00 0.00
6 0.00 -0.2103 1.73 1.51 107.11 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.88 0.00 0.00
7 0.00 -0.2103 2.32 2.11 198.00 251.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.88 0.00 0.00
8 0.00 -0.2103 3.00 2.79 324.76 251.03 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.89 0.00 0.00
9 0.00 -0.2103 3.74 3.53 491.91 251.34 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.91 0.00 0.00
10 0.00 -0.2103 4.54 4.33 703.60 251.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.92 0.00 0.00
11 0.00 -0.2103 5.40 5.19 963.53 251.06 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.94 0.00 0.00
12 0.00 -0.2103 6.30 6.09 1274.92 251.08 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.96 0.00 0.00
13 0.00 -0.2103 7.24 7.03 1640.47 251.10 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.99 0.00 0.00
14 0.00 -0.2103 8.21 8.00 2062.37 251.12 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.02 0.00 0.00
15 0.00 -0.2103 9.19 8.98 2542.21 251.14 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.05 0.00 0.00
16 0.00 -0.2103 10.18 9.97 3081.06 251.17 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.09 0.00 0.00
17 0.00 -0.2103 11.17 10.96 3679.35 251.20 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.14 0.00 0.00
18 0.00 -0.2103 12.15 11.94 4336.96 251.23 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.18 0.00 0.00
19 0.00 -0.2103 13.10 12.89 6063.16 251.27 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.23 0.00 0.00
20 0.00 -0.2103 14.03 13.82 5826.67 251.31 0.31 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.29 0.00 0.00
21 0.00 -0.2103 14.91 14.70 6655.60 251.36 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.35 0.00 0.00
22 0.00 -0.2103 15.74 15.53 7537.53 251.40 0.40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.41 0.00 0.00
23 0.00 -0.2103 16.52 16.31 8469.54 251.45 0.45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.47 0.00 0.00
24 0.00 -0.2103 17.23 17.02 9448.17 251.50 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.54 0.00 0.00
25 0.00 -0.2103 17.87 17.66 10469.53 251.55 0.55 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.61 0.00 0.00
26 0.00 -0.2103 18.43 18.22 11529.29 251.61 0.61 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.68 0.00 0.00
27 0.00 -0.2103 18.91 18.70 12622.74 251.67 0.67 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.75 0.00 0.00
28 0.00 -0.2103 19.30 19.09 13744.86 251.72 0.72 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.82 0.00 0.00
29 0.00 -0.2103 19.60 19.39 14890.30 251.78 0.78 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.89 0.00 0.00
30 0.00 -0.2103 19.80 19.59 16053.53 251.84 0.84 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.95 0.00 0.00
31 0.00 -0.2103 19.90 19.69 17228.81 251.89 0.89 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.02 0.00 0.00
32 0.00 -0.2103 19.91 19.70 18410.29 251.95 0.95 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.09 0.00 0.00
33 0.00 -0.2103 19.81 19.60 19592.06 252.01 1.01 0.00 0.00 0.00 0.00 0.00 0.00 0.13 0.00 0.00 0.00 0.00 0.00 6.15 0.00 0.00
34 0.00 -0.2103 19.62 19.41 20768.14 252.06 1.06 0.04 0.00 0.00 0.00 0.00 0.04 0.44 0.04 0.04 0.00 0.00 0.04 6.21 0.04 0.00
35 0.00 -0.2103 19.33 19.12 21930.67 252.11 1.11 0.09 0.00 0.00 0.00 0.00 0.09 0.60 0.09 0.09 0.00 0.00 0.09 6.27 0.09 0.00
36 0.00 -0.2103 18.95 18.74 23072.61 252.16 1.16 0.16 0.00 0.00 0.00 0.00 0.16 0.72 0.16 0.16 0.00 0.00 0.16 6.33 0.16 0.00
37 0.00 -0.2103 18.49 18.27 24187.67 252.21 1.21 0.24 0.00 0.00 0.00 0.00 0.24 0.82 0.24 0.24 0.00 0.00 0.24 6.38 0.24 0.00
38 0.00 -0.2103 17.93 17.72 25270.05 252.25 1.25 0.32 0.00 0.00 0.00 0.00 0.32 0.91 0.32 0.32 0.00 0.00 0.32 6.43 0.32 0.00
39 0.00 -0.2103 17.30 17.09 26314.41 252.30 1.30 0.40 0.00 0.00 0.00 0.00 0.40 0.98 0.40 0.40 0.00 0.00 0.40 6.48 0.40 0.00
40 0.00 -0.2103 16.63 16.42 27315.89 252.33 1.33 0.48 0.00 0.00 0.00 0.00 0.48 1.04 0.48 0.48 0.00 0.00 0.48 6.52 0.48 0.00
41 0.00 -0.2103 15.96 15.75 28272.27 252.37 1.37 0.56 0.00 0.00 0.00 0.00 0.56 1.10 0.56 0.56 0.00 0.00 0.56 6.56 0.56 0.00
42 0.00 -0.2103 15.31 15.10 29163.49 252.41 1.41 0.64 0.00 0.00 0.00 0.00 0.64 1.15 0.64 0.64 0.00 0.00 0.64 6.60 0.64 0.00
43 0.00 -0.2103 14.70 14.49 30061.30 252.44 1.44 0.72 0.00 0.00 0.00 0.00 0.72 1.20 0.72 0.72 0.00 0.00 0.72 6.63 0.72 0.00
44 0.00 -0.2103 14.10 13.89 30877.38 252.47 1.47 0.79 0.00 0.00 0.00 0.00 0.79 1.24 0.79 0.79 0.00 0.00 079 6.67 079 0.00
40 0.00 -0.2103 13.53 13.32 31663.41 252.50 1.50 0.86 0.00 0.00 0.00 0.00 0.86 1.27 0.86 0.86 0.00 0.00 0.86 6.70 0.86 0.00
46 0.00 -0.2103 12.99 12.78 32410.98 252.52 1.52 1.10 0.00 0.00 0.00 0.00 0.93 1.30 0.94 0.93 0.17 11.31 1.10 6.72 1.10 0.00
47 0.00 -0.2103 12.46 12.25 33111.64 252.55 1.55 1.49 0.00 0.00 0.00 0.00 1.00 1.33 0.98 0.98 0.51 16.42 1.49 6.75 1.49 0.00
48 0.00 -0.2103 11.96 11.75 33767.26 252.57 1.57 1.93 0.00 0.00 0.00 0.00 1.06 1.36 1.02 1.02 0.92 19.95 1.93 6.77 1.93 0.00
49 0.00 -0.2103 11.48 11.27 34346.24 252.59 1.59 2.39 0.00 0.00 0.00 0.00 1.11 1.38 1.05 1.05 1.34 22.66 2.39 6.79 2.39 0.00
50 0.00 -0.2103 11.01 10.80 34878.83 252.60 1.60 2.84 0.00 0.00 0.00 0.00 1.16 1.40 1.07 1.07 1.77 24.82 2.84 6.81 2.84 0.00
51 0.00 -0.2103 10.57 10.36 35356.60 252.62 1.62 3.27 0.00 0.00 0.00 0.00 1.21 1.42 1.10 1.10 2.17 26.60 3.27 6.83 3.27 0.00
52 0.00 -0.2103 10.14 9.93 35781.89 252.63 1.63 3.67 0.00 0.00 0.00 0.00 1.25 1.44 1.12 1.12 2.55 28.07 3.67 6.84 3.67 0.00
53 0.00 -0.2103 9.73 9.52 36167.51 252.64 1.64 4.04 0.00 0.00 0.00 0.00 1.28 1.45 1.13 1.13 2.90 29.30 4.04 6.85 4.04 0.00
54 0.00 -0.2103 9.34 9.13 36486.52 252.65 1.65 4.37 0.00 0.00 0.00 0.00 1.31 1.46 1.15 1.15 3.22 30.33 4.37 6.86 4.37 0.00
55 0.00 -0.2103 8.96 8.75 36772.10 252.66 1.66 4.66 0.00 0.00 0.00 0.00 1.34 1.47 1.16 1.16 3.50 31.19 4.66 6.87 4.66 0.00
56 0.00 -0.2103 8.60 8.39 37017.42 252.67 1.67 4.92 0.00 0.00 0.00 0.00 1.36 1.48 1.17 1.17 3.75 31.90 4.92 6.88 4.92 0.00
57 0.00 -0.2103 8.25 8.04 37225.59 252.68 1.68 5.14 0.00 0.00 0.00 0.00 1.38 1.49 1.18 1.18 3.96 32.49 5.14 6.89 5.14 0.00
58 0.00 -0.2103 7.92 7.71 37399.65 252.68 1.68 5.33 0.00 0.00 0.00 0.00 1.40 1.49 1.19 1.19 4.14 32.98 5.33 6.89 5.33 0.00
59 0.00 -0.2103 7.60 7.39 37542.46 252.69 1.69 5.49 0.00 0.00 0.00 0.00 1.41 1.50 1.19 1.19 4.29 33.37 5.49 6.90 5.49 0.00
60 0.00 -0.2103 7.29 7.08 37656.78 252.69 1.69 5.61 0.00 0.00 0.00 0.00 1.42 1.50 1.20 1.20 ` 4.41 33.68 5.61 6.90 5.61 0.00
61 0.00 -0.2103 7.00 6.79 37745.18 252.69 1.69 5.71 0.00 0.00 0.00 0.00 1.43 1.50 1.2gm 1.20 Ilmg.,p1 33.92 5.71 6.90 5.71 0.00
Prepared 7/16/2024 Page 9

100-yr Routing
62 0.00 -0.2103 6.72 6.51 37810.07 252.70 1.70 5.78 0.00 0.00 0.00 0.00 1.44 1.51 1.IM 1.21 ■ 4.52 34.09 5.78 6.91 5.78 0.00
63 0.00 -0.2103 6.45 6.24 37853.69 252.70 1.70 5.83 0.00 0.00 0.00 0.00 1.44 1.51 1.21 1.21 1 4.62 34.20 5.83 6.91 5.83 0.00
64 0.00 -0.2103 6.19 5.98 37878.15 252.70 1.70 5.86 0.00 0.00 0.00 0.00 1.44 1.51 1.21 1.21 4.65 34.27 5.86 6.91 5.86 0.00
65 0.00 -0.2103 5.94 5.73 37885.36 252.70 1.70 5.86 0.00 0.00 0.00 0.00 1.44 1.51 1.21 1.21 4.65 34.29 5.86 6.91 5.86 0.00
66 0.00 -0.2103 5.70 5.49 37877.11 252.70 1.70 5.85 0.00 0.00 0.00 0.00 1.44 1.51 1.21 1.21 4.65 34.27 5.85 6.91 5.85 0.00
67 0.00 -0.2103 5.47 5.26 37855.03 252.70 1.70 5.83 0.00 0.00 0.00 0.00 1.44 1.51 1.21 1.21 4.62 34.21 5.83 6.91 5.83 0.00
68 0.00 -0.2103 5.25 5.04 37820.62 252.70 1.70 5.79 0.00 0.00 0.00 0.00 1.44 1.51 1.21 1.21 4.59 34.12 5.79 6.91 5.79 0.00
69 0.00 -0.2103 5.03 4.82 37775.27 252.69 1.69 5.74 0.00 0.00 0.00 0.00 1.43 1.50 1.20 1.20 4.54 34.00 5.74 6.91 5.74 0.00
70 0.00 -0.2103 4.83 4.62 37720.22 252.69 1.69 5.68 0.00 0.00 0.00 0.00 1.43 1.50 1.20 1.20 4.48 33.85 5.68 6.90 5.68 0.00
71 0.00 -0.2103 4.64 4.43 37656.63 252.69 1.69 5.61 0.00 0.00 0.00 0.00 1.42 1.50 1.20 1.20 4.41 33.68 5.61 6.90 5.61 0.00
72 0.00 -0.2103 4.45 4.24 37585.53 252.69 1.69 5.53 0.00 0.00 0.00 0.00 1.42 1.50 1.20 1.20 4.34 33.49 5.53 6.90 5.53 0.00
73 0.00 -0.2103 4.27 4.06 37507.89 252.69 1.69 5.45 0.00 0.00 0.00 0.00 1.41 1.50 1.19 1.19 4.25 33.28 5.45 6.90 5.45 0.00
74 0.00 -0.2103 4.10 3.89 37424.55 252.68 1.68 5.36 0.00 0.00 0.00 0.00 1.40 1.49 1.19 1.19 4.17 33.05 5.36 6.89 5.36 0.00
75 0.00 -0.2103 3.93 3.72 37336.31 252.68 1.68 5.26 0.00 0.00 0.00 0.00 1.39 1.49 1.19 1.19 4.08 32.80 5.26 6.89 5.26 0.00
76 0.00 -0.2103 3.77 3.56 37243.86 252.68 1.68 5.16 0.00 0.00 0.00 0.00 1.38 1.49 1.18 1.18 3.98 32.54 5.16 6.89 5.16 0.00
71 0.00 -0.2103 3.62 3.41 37147.86 252.68 1.68 5.06 0.00 0.00 0.00 0.00 1.37 1.48 1.18 1.18 3.88 32.27 5.06 6.89 5.06 0.00
78 0.00 -0.2103 3.47 3.26 37048.88 252.67 1.67 4.95 0.00 0.00 0.00 0.00 1.36 1.48 1.17 1.17 3.78 31.99 4.95 6.88 4.95 0.00
79 0.00 -0.2103 3.33 3.12 36947.44 252.67 1.67 4.85 0.00 0.00 0.00 0.00 1.36 1.48 1.17 1.17 3.68 31.70 4.85 6.88 4.85 0.00
80 0.00 -0.2103 3.20 2.99 36844.01 252.67 1.67 4.74 0.00 0.00 0.00 0.00 1.35 1.47 1.16 1.16 3.57 31.40 4.74 6.88 4.74 0.00
81 0.00 -0.2103 3.07 2.86 36739.01 252.66 1.66 4.630 0.00 0.00 0.00 0.00 1.34 1.47 1.16 1.16 3.47 31.09 4.63 6.87 4.63 0.00
82 0.00 -0.2103 2.95 2.74 36632.82 252.66 1.66 4.52 0.00 0.00 0.00 0.00 1.33 1.47 1.16 1.16 3.36 30.71 4.52 6.87 4.52 0.00
83 0.00 -0.2103 2.83 2.62 36525.79 252.66 1.66 4.41 0.00 0.00 0.00 0.00 1.32 1.46 1.15 1.15 3.26 30.45 4.41 6.87 4.41 0.00
84 0.00 -0.2103 2.71 2.50 36418.20 252.65 1.65 4.30 0.00 0.00 0.00 0.00 1.31 1.46 1.15 1.15 3.15 30.12 4.30 6.86 4.30 0.00
85 0.00 -0.2103 2.60 2.39 36310.33 252.65 1.65 4.19 0.00 0.00 0.00 0.00 1.30 1.46 1.14 1.14 3.05 29.78 4.19 6.86 4.19 0.00
86 0.00 -0.2103 2.50 2.29 36202.43 252.65 1.65 4.08 0.00 0.00 0.00 0.00 1.29 1.45 1.14 1.14 2.95 29.44 4.08 6.85 4.08 0.00
87 0.00 -0.2103 2.40 2.19 36094.70 252.64 1.64 3.98 0.00 0.00 0.00 0.00 1.28 1.45 1.13 1.13 2.85 29.10 3.98 6.85 3.98 0.00
88 0.00 -0.2103 2.30 2.09 35987.33 252.64 1.64 3.87 0.00 0.00 0.00 0.00 1.27 1.44 1.13 1.13 2.74 28.75 3.87 6.85 3.87 0.00
89 0.00 -0.2103 2.21 2.00 35880.50 252.64 1.64 3.77 0.00 0.00 0.00 0.00 1.26 1.44 1.12 1.12 2.65 28.40 3., 6.84 3., 0.00
90 0.00 -0.2103 2.12 1.91 35774.34 252.63 1.63 3.66 0.00 0.00 0.00 0.00 1.25 1.44 1.12 1.12 2.55 28.05 3.66 6.84 3.66 0.00
91 0.00 -0.2103 2.03 1.82 35668.99 252.63 1.63 3.56 0.00 0.00 0.00 0.00 1.24 1.43 1.11 1.11 2.45 27.69 3.56 6.84 3.56 0.00
92 0.00 -0.2103 1.95 1.74 35564.55 252.63 1.63 3.46 0.00 0.00 0.00 0.00 1.23 1.43 1.11 1.11 2.36 27.33 3.46 6.83 3.46 0.00
93 0.00 -0.2103 1.87 1.66 35461.13 252.62 1.62 3.37 0.00 0.00 0.00 0.00 1.22 1.42 1.10 1.10 2.27 26.97 3.37 6.83 3.37 0.00
94 0.00 -0.2103 1.80 1.59 35358.80 252.62 1.62 3.27 0.00 0.00 0.00 0.00 1.21 1.42 1.10 1.10 2.18 26.61 3.27 6.83 3.27 0.00
95 0.00 -0.2103 1.72 1.51 35257.64 252.62 1.62 3.18 0.00 0.00 0.00 0.00 1.20 1.42 1.09 1.09 2.09 26.24 3.18 6.82 3.18 0.00
96 0.00 -0.2103 1.65 1.44 35157.70 252.61 1.61 3.09 0.00 0.00 0.00 0.00 1.19 1.41 1.09 1.09 2.00 25.88 3.09 6.82 3.09 0.00
97 0.00 -0.2103 1.59 1.38 35059.04 252.61 1.61 3.00 0.00 0.00 0.00 0.00 1.18 1.41 1.08 1.08 1.92 25.51 3.00 6.82 3.00 0.00
98 0.00 -0.2103 1.52 1.31 34961.69 252.61 1.61 2.91 0.00 0.00 0.00 0.00 1.17 1.41 1.08 1.08 1.84 25.14 2.91 6.81 2.91 0.00
99 0.00 -0.2103 1.46 1.25 34865.70 252.60 1.60 2.83 0.00 0.00 0.00 0.00 1.16 1.40 1.07 1.07 1.76 24., 2.83 6.81 2.83 0.00
100 0.00 -0.2103 1.40 1.19 34771.07 252.60 1.60 2.75 0.00 0.00 0.00 0.00 1.15 1.40 1.07 1.07 1.68 24.40 2.75 6.81 2.75 0.00
101 0.00 -0.2103 1.35 1.14 346]].84 252.60 1.60 2.67 0.00 0.00 0.00 0.00 1.14 1.40 1.06 1.06 1.60 24.03 2.67 6.80 2.67 0.00
102 0.00 -0.2103 1.29 1.08 34586.01 252.59 1.59 2.59 0.00 0.00 0.00 0.00 1.13 1.39 1.06 1.06 1.53 23.66 2.59 6.80 2.59 0.00
103 0.00 -0.2103 1.24 1.03 34495.60 252.59 1.59 2.51 0.00 0.00 0.00 0.00 1.13 1.39 1.05 1.05 1.46 23.29 2.51 6.80 2.51 0.00
104 0.00 -0.2103 1.19 0.98 34406.60 252.59 1.59 2.44 0.00 0.00 0.00 0.00 1.12 1.39 1.05 1.05 1.39 22.91 2.44 6.79 2.44 0.00
105 0.00 -0.2103 1.14 0.93 34319.01 252.59 1.59 2.37 0.00 0.00 0.00 0.00 1.11 1.38 1.05 1.05 1.32 22.54 2.37 6.79 2.37 0.00
106 0.00 -0.2103 1.10 0.89 34232.83 252.58 1.58 2.30 0.00 0.00 0.00 0.00 1.10 1.38 1.04 1.04 1.26 22.16 2.30 6.79 2.30 0.00
107 0.00 -0.2103 1.05 0.84 34148.05 252.58 1.58 2.23 0.00 0.00 0.00 0.00 1.09 1.38 1.04 1.04 1.19 21.79 2.23 6.79 2.23 0.00
108 0.00 -0.2103 1.01 0.80 34064.67 252.58 1.58 2.17 0.00 0.00 0.00 0.00 1.09 1.37 1.03 1.03 1.13 21.41 2.17 6.78 2.17 0.00
109 0.00 -0.2103 0.97 0.76 33982.65 252.57 1.57 2.10 0.00 0.00 0.00 0.00 1.08 1.37 1.03 1.03 1.07 21.03 2.10 6.78 2.10 0.00
110 0.00 -0.2103 0.93 0.72 33902.00 252.57 1.57 2.04 0.00 0.00 0.00 0.00 1.07 1.37 1.02 1.02 1.02 20.65 2.04 6.78 2.04 0.00
111 0.00 -0.2103 0.89 0.68 33822.68 252.57 1.57 1.98 0.00 0.00 0.00 0.00 1.06 1.36 1.02 1.02 0.96 20.27 1.98 6.77 1.98 0.00
112 0.00 -0.2103 0.86 0.65 33744.69 252.57 1.57 1.92 0.00 0.00 0.00 0.00 1.06 1.36 1.02 1.02 0.91 19.88 1.92 6.77 1.92 0.00
113 0.00 -0.2103 0.82 0.61 33667.99 252.56 1.56 1.87 0.00 0.00 0.00 0.00 1.05 1.36 1.01 1.01 0.86 19.50 1.87 6.77 1.87 0.00
114 0.00 -0.2103 0.79 0.58 33592.57 252.56 1.56 1.81 0.00 0.00 0.00 0.00 1.04 1.35 1.01 1.01 0.81 19.11 1.81 6.77 1.81 0.00
115 0.00 -0.2103 0.76 0.55 33518.39 252.56 1.56 1.76 0.00 0.00 0.00 0.00 1.03 1.35 1.00 1.00 0.76 18.72 1.76 6.76 1.76 0.00
116 0.00 -0.2103 0.73 0.52 33445.44 252.56 1.56 1.71 0.00 0.00 0.00 0.00 1.03 1.35 1.00 1.00 0.71 18.33 1.71 6.76 1.71 0.00
117 0.00 -0.2103 0.70 0.49 33373.69 252.55 1.55 1.66 0.00 0.00 0.00 0.00 1.02 1.34 1.00 1.00 0.67 17.94 1.66 6.76 1.66 0.00
118 0.00 -0.2103 0.67 0.46 33303.10 252.55 1.55 1.62 0.00 0.00 0.00 0.00 1.01 1.34 0.99 0.99 0.62 17.54 1.62 6.76 1.62 0.00
119 0.00 -0.2103 0.64 0.43 33233.66 252.55 1.55 1.57 0.00 0.00 0.00 0.00 1.01 1.34 0.99 0.99 0.58 17.14 1.57 6.75 1.57 0.00
120 0.00 -0.2103 0.62 0.41 33165.32 252.55 1.55 1.53 0.00 0.00 0.00 0.00 1.00 1.34 0.98 0.98 0.54 16.74 1.53 6.75 1.53 0.00
121 0.00 -0.2103 0.59 0.38 33098.07 252.54 1.54 1.48 0.00 0.00 0.00 0.00 1.00 1.33 0.98 0.98 0.50 16.33 1.48 6.75 1.48 0.00
122 0.00 -0.2103 0.57 0.36 33031.86 252.54 1.54 1.44 0.00 0.00 0.00 0.00 0.99 1.33 0.98 0.98 0.47 15.92 1.44 6.75 1.44 0.00
123 0.00 -0.2103 0.54 0.33 32966.68 252.54 1.54 1.40 0.00 0.00 0.00 0.00 0.98 1.33 0.97 0.97 0.43 15.50 1.40 6.74 1.40 0.00
124 0.00 -0.2103 0.52 0.31 32902.48 252.54 1.54 1.37 0.00 0.00 0.00 0.00 0.98 1.32 0.97 0.97 0.40 15.08 1.37 6.74 1.37 0.00
125 0.00 -0.2103 0.50 0.29 32839.24 252.54 1.54 1.33 0.00 0.00 0.00 0.00 0.97 1.32 0.97 0.97 0.36 14.65 1.33 6.74 1.33 0.00
126 0.00 -0.2103 0.48 0.27 32776.92 252.53 1.53 1.29 0.00 0.00 0.00 0.00 0.97 1.32 0.96 0.96 0.33 14.22 1.29 6.74 1.29 0.00
127 0.00 -0.2103 0.46 0.25 32715.49 252.53 1.53 1.26 0.00 0.00 0.00 0.00 0.96 1.32 0.96 0.96 0.30 13., 1.26 6.74 1.26 0.00
128 0.00 -0.2103 0.44 0.23 32654.91 252.53 1.53 1.23 0.00 0.00 0.00 0.00 0.95 1.31 0.96 0.95 0.27 13.32 1.23 6.73 1.23 0.00
129 0.00 -0.2103 0.42 0.21 32595.19 252.53 1.53 1.19 0.00 0.00 0.00 0.00 0.95 1.31 0.95 0.95 0.25 12.86 1.19 6.73 1.19 0.00
130 0.00 -0.2103 0.41 0.20 32536.38 252.53 1.53 1.16 0.00 0.00 0.00 0.00 0.94 1.31 0.95 0.94 0.22 12.39 1.16 6.73 1.16 0.00
131 0.00 -0.2103 0.39 0.18 32478.43 252.52 1.52 5.83 0.00 0.00 0.00 0.00 0.94 1.31 0.94 5.63 0.19 11.90 5.83 6.73 5.83 0.00
132 0.00 -0.2103 0.38 0.17 32139.77 252.51 1.51 5.51 0.00 0.00 0.00 0.00 0.91 1.29 0.92 5.44 0.07 8.51 5.51 6.71 5.51 0.00
133 0.00 -0.2103 0.36 0.15 31818.79 252.50 1.50 5.27 0.00 0.00 0.00 0.00 0.88 1.28 0.90 5.27 0.00 2.51 5.27 6.70 5.27 0.00
134 0.00 -0.2103 0.35 0.14 31511.67 252.49 1.49 5.10 0.00 0.00 0.00 0.00 0.85 1.26 0.85 5.10 0.00 0.00 5.10 6.69 5.10 0.00
135 0.00 -0.2103 0.33 0.12 31213.89 252.48 1.48 4.94 0.00 0.00 0.00 0.00 0.82 1.25 0.82 4.94 0.00 0.00 4.94 6.68 4.94 0.00
136 0.00 -0.2103 0.32 0.11 30925.04 252.47 1.47 4.78 0.00 0.00 0.00 0.00 0.80 1.24 0.80 4.78 0.00 0.00 4.78 6.67 4.78 0.00
137 0.00 -0.2103 0.31 0.10 30644.83 252.46 1.46 4.63 0.00 0.00 0.00 0.00 0.77 1.22 0.77 4.63 0.00 0.00 4.63 6.66 4.63 0.00
138 0.00 -0.2103 0.29 0.08 30372.98 252.45 1.45 4.48 0.00 0.00 0.00 0.00 0.75 1.21 0.75 4.48 0.00 0.00 4.48 6.65 4.48 0.00
139 0.00 -0.2103 0.28 0.07 30109.22 252.44 1.44 4.34 0.00 0.00 0.00 0.00 0.72 1.20 0.72 4.34 0.00 0.00 4.34 6.64 4.34 0.00
140 0.00 -0.2103 0.27 0.06 29853.27 252.43 1.43 4.20 0.00 0.00 0.00 0.00 0.70 1.19 0.70 4.20 0.00 0.00 4.20 6.63 4.20 0.00
141 0.00 -0.2103 0.26 0.05 29604.87 252.42 1.42 4.07 0.00 0.00 0.00 0.00 0.68 1.17 0.68 4.07 0.00 0.00 4.07 6.62 4.07 0.00
142 0.00 -0.2103 0.25 0.04 29363.79 252.41 1.41 3.94 0.00 0.00 0.00 0.00 0.66 1.16 0.66 3.94 0.00 0.00 3.94 6.61 3.94 0.00
143 0.00 -0.2103 0.24 0.03 29129.76 252.40 1.40 3.81 0.00 0.00 0.00 0.00 0.64 1.15 0.64 3.81 0.00 0.00 3.81 6.60 3.81 0.00
144 0.00 -0.2103 0.23 0.02 28902.56 252.40 1.40 3.70 0.00 0.00 0.00 0.00 0.62 1.14 0.62 3.70 0.00 0.00 3.70 6.59 3.70 0.00
145 0.00 -0.2103 0.22 0.01 28681.97 252.39 1.39 3.58 0.00 0.00 0.00 0.00 0.60 1.12 0.60 3.58 0.00 0.00 3.58 6.58 3.58 0.00
146 0.00 -0.2103 0.21 0.00 28467.75 252.38 1.38 3.47 0.00 0.00 0.00 0.00 0.58 1.11 0.58 3.47 0.00 0.00 3.47 6.57 3.47 0.00
147 0.00 -0.2103 0.20 -0.01 28259.70 252.37 1.37 3.36 0.00 0.00 0.00 0.00 0.56 1.10 0.56 3.36 0.00 0.00 3.36 6.56 3.36 0.00
148 0.00 -0.2103 0.19 -0.02 28057.62 252.36 1.36 3.26 0.00 0.00 0.00 0.00 0.54 1.09 0.54 3.26 0.00 0.00 3.26 6.55 3.26 0.00
149 0.00 -0.2103 0.19 -0.02 27861.30 252.36 1.36 3.16 0.00 0.00 0.00 0.00 0.53 1.08 0.53 3.16 0.00 0.00 3.16 6.55 3.16 0.00
150 0.00 -0.2103 0.18 -0.03 27670.54 252.35 1.35 3.06 0.00 0.00 0.00 0.00 0.51 1.07 0.51 3.06 0.00 0.00 3.08 6.54 3.06 0.00
Prepared 7/16/2024 Page 10

100-yr Plot
Hoke County High School
Pond Routing
25.00
100-yr
20.00
i. .\
•\ Outflow
.\
15.00 —A—Total Inflow
N
` 0.00
a
5.00 A
■■`�� rf�■ `■.■eN
■■��■■
■
0.00 11I IlI1111111111111111111111 MR . - ---'
n 20 40 60 80 100 120 140
-5.00
Time (min)
Prepared by Kevin Lindsay 7/16/2024 Page 11

Hoke County High School Underdrain
Qdes (10-year) (cfs) 0.42 Orifice Coeff. (Cd) 0.6 0.65 RCP Bell ei
Number of Barrels 3 Entrance Loss (Kent) 0.2 0.6 Default
Length (ft) 240 Exit Loss (Kexit) 1 0.52 CMP Miter(
Entrance Invert ele. (ft) 248.00 Aggregate Loss (Ke) 1.2 0.51 CMP Prole(
Max. Allow. Upstrm Wtr Surf. Ele. (ft) 252.00 Manning's n 0.013 0.59 Square ede
Expected Tailwater Ele. At Odes (ft) 249.5
Exit Invert ele. (ft) 248
Headwater Depth HW (ft) 4.00
Q (cfs) (per pipe) 0.140205787
Head H (ft) under outlet control 2.5
Inlet Control for Circular Pipes (by orifice equation)
Q=Cd*A*(2gh)^(1/2) where:
can be converted to Q = Discharge (cfs)
Q=0.0437*Cd*D^2*(Z-D/24)^(1/2) D = Pipe Diameter(in)
and rearranged to solve for D: Z = Depth of water above entrance invert(ft)
Cd = Coeff. Of discharge in British Cust. Units
Trials:
D (in) = HW/D = Q(D) (cfs) > 0.140205787
2 24.0 0.21
4 12.0 0.82
6 8.0 1.83
Za + Pa/Y +Va^2/2g =Zb + Pb/Y+Vb^2/2g + hf+ hm + Em
can be converted to: where:
Za =Zb + [522*Q^2/(D^4)]*[((5096*L*n^2)/D^1.33) + Ke] Za = Wtr. Surf. Ele. Upstream (ft)
Solve above eq. For D Zb = Wtr. Surf. Ele. Dwnstream (ft)
Trials L = Length of Pipe (ft)
D (in) = Za (ft) < Q = Discharge (cfs) per pipe
252 D = Pipe Diameter(in)
2 303.0 n = Manning's n .012 f/RCP
4 250.9 .024 f/CMP
6 249.7 Ke = Aggregate Loss Coeff.

Buoyancy Calculations--SCM 2 Outlet
Riser Width x
Depth= 4 x 4 ft
Riser Height= 5.00 ft 150 PCF concr.
Riser Area= 25.00 sf 62.4 PCF wtr
Riser Vol= 125.00 cf
Buoyancy= 7,800 LB (VoI*62.4 PCF)
Weight Riser: VOL (CF) Weight (LB)
Top= 12.50 1875
Side 1= 7.30 1095 Shortest Side 1 w/o corners
Side 2= 7.30 1095 Shortest Side 2 w/o corners
Side 3= 8.94 1341 Longest Side 1 w/corners minus pipe void
Side 4= 8.73 1310 Longest Side 2 w/corners minus pipe void
Bottom= 33.75 5063
Vol Conc.= 78.52 11,778 =LB Basin WT
FS= 1.51
Elevations
Top Riser T1 T1 252.50
A
Dimension (ft)
H1= 3.65 H1
T1= 0.5 D �/
T2= 1.35 /
_ U 248.85
W1(inside)= 4
W2(inside)= 4 T2 247.50
Weir= 0.50 H x 0.75 W I
D Orifice 2 (inside)= 0.00 W1=Width short
D Outlet (inside)= 1.00 W2=Width long