HomeMy WebLinkAboutDrainage Report DRAINAGE REPORT
FOR
Barron Crest
Subdivision
College Station, Texas
JUNE 2014
REVISED SE-141E44MR 2014
oc -o be
MBESI# 1086-0002
D McCLURE & BROWNE ENGINEERING/SURVEYING, INC.
a 1008 Woodcreek Dr.,Suite 103 College Station,Tx.77845 (979)693-3838 Engineer Reg.No.F-458
Survey Reg.No.101033-00
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EXHIBIT"D-2"
PROPOSED DETENTION POND ROUTING
"Plugged Condition"
Barron Crest Subdivision
D.A.# D.A.# Pond Routing EVENT= 5 D.A.# D.A.# D.A.#
* C
a
O. W' C W CI
o) Z r• d a O J O J F-
13 o reo + n x
>. p Ox O X
i a o .E N N 5 aW,
a F- 0. W W F- W
Qp 22.8 2.0 17.5 2.8
Tc 10.0 10.0 10.0 10.0
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 2.28 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 2.3 2.3 6.84 2.28 2.28 0.00 324.2 0.2 0.20 1.8 0.3 2.03
2.0 4.6 4.6 11.40 9.12 9.12 0.00 324.3 0.4 0.40 3.5 0.6 4.07
3.0 6.8 6.8 15.96 20.52 20.52 0.00 324.5 0.6 0.60 5.3 0.8 6.10
4.0 9.1 9.1 20.52 36.48 36.48 0.00 324.6 0.8 0.80 7.0 1.1 8.13
5.0 11.4 11.4 25.08 57.00 57.00 0.00 324.7 1.0 0.99 8.8 1.4 10.17
6.0 13.7 13.7 29.64 82.09 82.09 0.00 324.8 1.2 1.19 10.5 1.7 12.20
7.0 16.0 16.0 34.20 111.73 111.73 0.00 325.0 1.4 1.39 12.3 2.0 14.23
8.0 18.2 18.2 38.76 145.93 145.93 0.00 325.2 1.6 1.59 14.0 2.2 16.27
9.0 20.5 20.5 43.32 184.69 184.69 0.00 325.3 1.8 1.79 15.8 2.5 18.30
10.0 22.8 22.8 44.46 228.01 228.01 0.00 325.5 2.0 1.99 17.5 2.8 20.33
11.0 21.7 21.7 42.18 272.48 272.48 0.00 325.7 1.9 1.89 16.7 2.7 19.32
12.0 20.5 20.5 39.90 314.66 314.66 0.00 325.9 1.8 1.79 15.8 2.5 18.30
13.0 19.4 19.4 37.62 353.51 354.56 0.53 326.0 1.7 2.22 14.9 2.4 17.28
14.0 18.2 18.2 35.34 387.88 391.13 1.63 326.1 1.6 3.22 14.0 2.2 16.27
15.0 17.1 17.1 33.06 418.03 423.22 2.60 326.2 1.5 4.09 13.2 2.1 15.25
16.0 16.0 16.0 30.78 444.22 451.09 3.44 326.2 1.4 4.83 12.3 2.0 14.23
17.0 14.8 14.8 28.50 466.69 475.00 4.16 326.3 1.3 5.45 11.4 1.8 13.22
18.0 13.7 13.7 26.22 485.66 495.19 4.77 326.3 1.2 5.96 10.5 1.7 12.20
19.0 12.5 12.5 23.94 501.35 511.88 5.27 326.3 1.1 6.36 9.6 1.5 11.18
20.0 11.4 11.4 21.66 513.95 525.29 5.67 326.4 1.0 6.67 8.8 1.4 10.17
21.0 10.3 10.3 19.38 523.64 535.61 5.98 326.4 0.9 6.88 7.9 1.3 9.15
22.0 9.1 9.1 17.10 530.61 543.02 6.21 326.4 0.8 7.00 7.0 1.1 8.13
23.0 8.0 8.0 14.82 535.01 547.71 6.35 326.4 0.7 7.04 6.1 1.0 7.12
24.0 6.8 6.8 12.54 537.01 549.83 6.41 326.4 0.6 7.01 5.3 0.8 6.10
25.0 5.7 5.7 10.26 536.74 549.55 6.40 326.4 0.5 6.90 4.4 0.7 5.08
26.0 4.6 4.6 7.98 534.35 547.00 6.33 326.4 0.4 6.72 3.5 0.6 4.07
27.0 3.4 3.4 5.70 529.96 542.33 6.19 326.4 0.3 6.48 2.6 0.4 3.05
28.0 2.3 2.3 3.42 523.69 535.66 5.98 326.4 0.2 6.18 1.8 0.3 2.03
29.0 1.1 1.1 1.14 515.65 527.11 5.73 326.4 0.1 5.83 0.9 0.1 1.02
PEAK FLOWS
23 23 6 326.40 2 7 18 3 1 20
10860002-dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-2"
PROPOSED DETENTION POND ROUTING
"Plugged Condition"
Barron Crest Subdivision
D.A.# D.A.# Pond Routing 'EVENT= 25 D.A.# D.A.# D.A.#
a c c
.c o
m Lu .+ ., c y CD
rn Z C O ° o J O
O N m C ri 7 ' R G Q a F
o N x>. c 0 m 2 O 0: K O X
I 0. 0 5 N N a O. W 0. i- 0. W W I- Ill
Qp 29.2 2.5 22.5 3.6
Tc 10.0 10.0 10.0 10.0
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 2.92 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 2.9 2.9 8.77 2.92 2.92 0.00 324.2 0.3 0.25 2.2 0.4 2.61
2.0 5.8 5.8 14.61 11.69 11.69 0.00 324.3 0.5 0.51 4.5 0.7 5.21
3.0 8.8 8.8 20.46 26.31 26.31 0.00 324.5 0.8 0.76 6.7 1.1 7.82
4.0 11.7 11.7 26.31 46.77 46.77 0.00 324.6 1.0 1.02 9.0 1.4 10.43
5.0 14.6 14.6 32.15 73.07 73.07 0.00 324.8 1.3 1.27 11.2 1.8 13.03
6.0 17.5 17.5 38.00 105.23 105.23 0.00 325.0 1.5 1.53 13.5 2.1 15.64
7.0 20.5 20.5 43.84 143.22 143.22 0.00 325.1 1.8 1.78 15.7 2.5 18.24
8.0 23.4 23.4 49.69 187.07 187.07 0.00 325.3 2.0 2.04 18.0 2.9 20.85
9.0 26.3 26.3 55.54 236.76 236.76 0.00 325.6 2.3 2.29 20.2 3.2 23.46
10.0 29.2 29.2 57.00 292.29 292.29 0.00 325.8 2.5 2.55 22.5 3.6 26.06
11.0 27.8 27.8 54.07 348.56 349.29 0.37 326.0 2.4 2.79 21.4 3.4 24.76
12.0 26.3 26.3 51.15 398.69 402.63 1.97 326.1 2.3 4.27 20.2 3.2 23.46
13.0 24.8 24.8 48.23 443.04 449.84 3.40 326.2 2.2 5.56 19.1 3.0 22.15
14.0 23.4 23.4 45.31 481.98 491.27 4.65 326.3 2.0 6.69 18.0 2.9 20.85
15.0 21.9 21.9 42.38 515.82 527.28 5.73 326.4 1.9 7.64 16.9 2.7 19.55
16.0 20.5 20.5 39.46 544.87 558.20 6.66 326.4 1.8 8.45 15.7 2.5 18.24
17.0 19.0 19.0 36.54 569.43 584.33 7.45 326.5 1.7 9.11 14.6 2.3 16.94
18.0 17.5 17.5 33.61 589.62 605.96 8.17 326.5 1.5 9.70 13.5 2.1 15.64
19.0 16.1 16.1 30.69 604.61 623.24 9.31 326.5 1.4 10.71 12.4 2.0 14.34
20.0 14.6 14.6 27.77 615.08 635.30 10.11 326.5 1.3 11.38 11.2 1.8 13.03
21.0 13.2 13.2 24.85 621.63 642.85 10.61 326.5 1.1 11.76 10.1 1.6 11.73
22.0 11.7 11.7 21.92 624.78 646.48 10.85 326.5 1.0 11.87 9.0 1.4 10.43
23.0 10.2 10.2 19.00 624.97 646.70 10.86 326.5 0.9 11.76 7.9 1.3 9.12
24.0 8.8 8.8 16.08 622.60 643.97 10.68 326.5 0.8 11.45 6.7 1.1 7.82
25.0 7.3 7.3 13.15 618.01 638.68 10.33 326.5 0.6 10.97 5.6 0.9 6.52
26.0 5.8 5.8 10.23 611.49 631.17 9.84 326.5 0.5 10.35 4.5 0.7 5.21
27.0 4.4 4.4 7.31 603.30 621.72 9.21 326.5 0.4 9.59 3.4 0.5 3.91
28.0 2.9 2.9 4.38 593.65 610.61 8.48 326.5 0.3 8.73 2.2 0.4 2.61
29.0 1.5 1.5 1.46 582.30 598.04 7.87 326.5 0.1 7.99 1.1 0.2 1.30
PEAK FLOWS
I 29 29 11 326.53 3 12 22 4 26
10860002-dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-2"
PROPOSED DETENTION POND ROUTING
"Plugged Condition"
Barron Crest Subdivision
D.A.# D.A.# Pond Routing I EVENT= 10 D.A.# D.A.# D.A.#
at c
ct
n W a+ c W0
s'> a an. aF-
c + i-
i. o O + in N c o c2 O m x x O X
>r a. o E N N a d W O. F- 0. W W F- W
Qp 25.6I 2.2 19.7 3.1
Tc 10.0 _ 10.0 10.0 10.0 __
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 2.56 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 2.6 2.6 7.68 2.56 2.56 0.00 324.2 0.2 0.22 2.0 0.3 2.28
2.0 5.1 5.1 12.80 10.24 10.24 0.00 324.3 0.4 0.45 3.9 0.6 4.56
3.0 7.7 7.7 17.91 23.03 23.03 0.00 324.5 0.7 0.67 5.9 0.9 6.85
4.0 10.2 10.2 23.03 40.95 40.95 0.00 324.6 0.9 0.89 7.9 1.3 9.13
5.0 12.8 12.8 28.15 63.98 63.98 0.00 324.7 1.1 1.12 9.8 1.6 11.41
6.0 15.4 15.4 33.27 92.13 92.13 0.00 324.9 1.3 1.34 11.8 1.9 13.69
7.0 17.9 17.9 38.39 125.40 125.40 0.00 325.1 1.6 1.56 13.8 2.2 15.97
8.0 20.5 20.5 43.51 163.79 163.79 0.00 325.2 1.8 1.79 15.7 2.5 18.26
9.0 23.0 23.0 48.63 207.30 207.30 0.00 325.4 2.0 2.01 17.7 2.8 20.54
10.0 25.6 25.6 49.91 255.93 255.93 0.00 325.6 2.2 2.23 19.7 3.1 22.82
11.0 24.3 24.3 47.35 305.83 305.83 0.00 325.9 2.1 2.12 18.7 3.0 21.68
12.0 23.0 23.0 44.79 352.21 353.18 0.48 326.0 2.0 2.49 17.7 2.8 20.54
13.0 21.8 21.8 42.23 393.39 397.00 1.80 326.1 1.9 3.70 16.7 2.7 19.40
14.0 20.5 20.5 39.67 429.68 435.62 2.97 326.2 1.8 4.75 15.7 2.5 18.26
15.0 19.2 19.2 37.11 461.38 469.35 3.99 326.2 1.7 5.66 14.8 2.4 17.12
16.0 17.9 17.9 34.55 488.76 498.49 4.86 326.3 1.6 6.43 13.8 2.2 15.97
17.0 16.6 16.6 31.99 512.08 523.31 5.61 326.3 1.5 7.06 12.8 2.0 14.83
18.0 15.4 15.4 29.43 531.60 544.07 6.24 326.4 1.3 7.58 11.8 1.9 13.69
19.0 14.1 14.1 26.87 547.53 561.03 6.75 326.4 1.2 7.98 10.8 1.7 12.55
20.0 12.8 12.8 24.31 560.09 574.40 7.15 326.4 1.1 8.27 9.8 1.6 11.41
21.0 11.5 11.5 21.75 569.50 584.41 7.45 326.5 1.0 8.46 8.9 1.4 10.27
22.0 10.2 10.2 19.19 575.93 591.25 7.66 326.5 0.9 8.55 7.9 1.3 9.13
23.0 9.0 9.0 16.64 579.57 595.12 7.78 326.5 0.8 8.56 6.9 1.1 7.99
24.0 7.7 7.7 14.08 580.58 596.20 7.81 326.5 0.7 8.48 5.9 0.9 6.85
25.0 6.4 6.4 11.52 579.13 594.66 7.76 326.5 0.6 8.32 4.9 0.8 5.71
26.0 5.1 5.1 8.96 575.36 590.65 7.64 326.5 0.4 8.09 3.9 0.6 4.56
27.0 3.8 3.8 6.40 569.41 584.32 7.45 326.5 0.3 7.79 3.0 0.5 3.42
28.0 2.6 2.6 3.84 561.42 575.81 7.20 326.4 0.2 7.42 2.0 0.3 2.28
29.0 1.3 1.3 1.28 551.51 565.26 6.88 326.4 0.1 6.99 1.0 0.2 1.14
PEAK FLOWS
26 26 8 326.49 2 9 20 3 1 23
10860002-dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-2"
PROPOSED DETENTION POND ROUTING
"Plugged Condition"
Barron Crest Subdivision
D.A.# D.A.# Pond Routing _EVENT= 1 100 D.A.# D.A.# D.A.#
it c 0
W a w
a + c C7
cn
L Z C o J Z
o N m + C7 W M Q a a ~
a rt c a + + C > a N O N r� u)
>. ° 0 + y c o " 2 OrG x x O x
I a. U C N C`4
O o. W 4. H a. W W F W
Qp37.1 3.2 28.6 4.5
Tc
10.0 1 10.0 10.0 10.0
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 3.71 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 3.7 3.7 11.14 3.71 3.71 0.00 324.2 0.3 0.32 2.9 0.5 3.31
2.0 7.4 7.4 18.56 14.85 14.85 0.00 324.4 0.6 0.65 5.7 0.9 6.62
3.0 11.1 11.1 25.99 33.41 33.41 0.00 324.6 1.0 0.97 8.6 1.4 9.93
4.0 14.9 14.9 33.41 59.40 59.40 0.00 324.7 1.3 1.30 11.4 1.8 13.24
5.0 18.6 18.6 40.84 92.82 92.82 0.00 324.9 1.6 1.62 14.3 2.3 16.55
6.0 22.3 22.3 48.27 133.66 133.66 0.00 325.1 1.9 1.94 17.1 2.7 19.86
7.0 26.0 26.0 55.69 181.93 181.93 0.00 325.3 2.3 2.27 20.0 3.2 23.17
8.0 29.7 29.7 63.12 237.62 237.62 0.00 325.6 2.6 2.59 22.8 3.6 26.49
9.0 33.4 33.4 70.54 300.73 300.73 0.00 325.8 2.9 2.91 25.7 4.1 29.80
10.0 37.1 37.1 72.40 369.22 371.28 1.03 326.1 3.2 4.27 28.6 4.5 33.11
11.0 35.3 35.3 68.69 435.32 441.62 3.15 326.2 3.1 6.23 27.1 4.3 31.45
12.0 33.4 33.4 64.97 493.94 504.00 5.03 326.3 2.9 7.94 25.7 4.1 29.80
13.0 31.6 31.6 61.26 545.54 558.92 6.69 326.4 2.8 9.44 24.3 3.9 28.14
14.0 29.7 29.7 57.55 590.35 606.80 8.23 326.5 2.6 10.82 22.8 3.6 26.49
15.0 27.8 27.8 53.84 626.01 647.90 10.94 326.5 2.4 13.37 21.4 3.4 24.83
16.0 26.0 26.0 50.12 653.74 679.85 13.06 326.6 2.3 15.32 20.0 3.2 23.17
17.0 24.1 24.1 46.41 674.57 703.86 14.64 326.6 2.1 16.75 18.6 3.0 21.52
18.0 22.3 22.3 42.70 689.43 720.98 15.78 326.6 1.9 17.72 17.1 2.7 19.86
19.0 20.4 20.4 38.98 699.10 732.12 16.51 326.6 1.8 18.29 15.7 2.5 18.21
20.0 18.6 18.6 35.27 704.27 738.08 16.91 326.6 1.6 18.53 14.3 2.3 16.55
21.0 16.7 16.7 31.56 705.53 739.54 17.00 326.6 1.5 18.46 12.9 2.0 14.90
22.0 14.9 14.9 27.85 703.41 737.09 16.84 326.6 1.3 18.14 11.4 1.8 13.24
23.0 13.0 13.0 24.13 698.34 731.25 16.46 326.6 1.1 17.59 10.0 1.6 11.59
24.0 11.1 11.1 20.42 690.73 722.48 15.88 326.6 1.0 16.85 8.6 1.4 9.93
25.0 9.3 9.3 16.71 680.89 711.15 15.13 326.6 0.8 15.94 7.1 1.1 8.28
26.0 7.4 7.4 12.99 669.14 697.60 14.23 326.6 0.6 14.88 5.7 0.9 6.62
27.0 5.6 5.6 9.28 655.72 682.14 13.21 326.6 0.5 13.69 4.3 0.7 4.97
28.0 3.7 3.7 5.57 640.85 665.00 12.07 326.5 0.3 12.40 2.9 0.5 3.31
29.0 1.9 1.9 1.86 624.73 646.42 10.85 326.5 0.2 11.01 1.4 0.2 1.66
PEAK FLOWS
37 37 17 326.60 3 19 29 5 1 33
1
4
I
I
1
s
i
t
i
9
i
I
1
3
'I
1
1
10860002-dra.xls
0.00 indicates inital condition Exhibit D-1
i.
EXHIBIT"D-2"
PROPOSED DETENTION POND ROUTING
"Plugged Condition"
Barron Crest Subdivision
D.A.# D.A.# Pond Routing EVENT= 50 D.A.# ' D.A.# D.A.#
# c
It
O 0 0
WZu.i co
0 V N N C7 a W a o- Da w I' ° w
Qp 33.0 2.9 _ 25.4 4.0
Tc 10.0 10.0 10.0 10.0
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 3.30 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 3.3 3.3 9.91 3.30 3.30 0.00 324.2 0.3 0.29 2.5 0.4 2.95
2.0 6.6 6.6 16.52 13.22 13.22 0.00 324.4 0.6 0.58 5.1 0.8 5.89
3.0 9.9 9.9 23.13 29.74 29.74 0.00 324.5 0.9 0.86 7.6 1.2 8.84
4.0 13.2 13.2 29.74 52.87 52.87 0.00 324.7 1.2 1.15 10.2 1.6 11.79
5.0 16.5 16.5 36.35 82.60 82.60 0.00 324.8 1.4 1.44 12.7 2.0 14.73
6.0 19.8 19.8 42.95 118.95 118.95 0.00 325.0 1.7 1.73 15.2 2.4 17.68
7.0 23.1 23.1 49.56 161.90 161.90 0.00 325.2 2.0 2.02 17.8 2.8 20.62
8.0 26.4 26.4 56.17 211.47 211.47 0.00 325.5 2.3 2.31 20.3 3.2 23.57
9.0 29.7 29.7 62.78 267.64 267.64 0.00 325.7 2.6 2.59 22.9 3.6 26.52
10.0 33.0 33.0 64.43 330.42 330.42 0.00 326.0 2.9 2.88 25.4 4.0 29.46
11.0 31.4 31.4 61.13 391.37 394.85 1.74 326.1 2.7 4.48 24.1 3.8 27.99
12.0 29.7 29.7 57.82 445.54 452.50 3.48 326.2 2.6 6.07 22.9 3.6 26.52
13.0 28.1 28.1 54.52 493.34 503.36 5.01 326.3 2.4 7.46 21.6 3.4 25.04
14.0 26.4 26.4 51.21 535.15 547.86 6.35 326.4 2.3 8.66 20.3 3.2 23.57
15.0 24.8 24.8 47.91 571.34 586.37 7.51 326.5 2.2 9.68 19.1 3.0 22.10
16.0 23.1 23.1 44.61 601.15 619.25 9.05 326.5 2.0 11.07 17.8 2.8 20.62
17.0 21.5 21.5 41.30 624.16 645.76 10.80 326.5 1.9 12.67 16.5 2.6 19.15
18.0 19.8 19.8 38.00 641.25 665.46 12.10 326.5 1.7 13.83 15.2 2.4 17.68
19.0 18.2 18.2 34.69 653.21 679.25 13.02 326.6 1.6 14.60 14.0 2.2 16.20
20.0 16.5 16.5 31.39 660.73 687.91 13.59 326.6 1.4 15.03 12.7 2.0 14.73
21.0 14.9 14.9 28.09 664.38 692.12 13.87 326.6 1.3 15.16 11.4 1.8 13.26
22.0 13.2 13.2 24.78 664.69 692.47 13.89 326.6 1.2 15.04 10.2 1.6 11.79
23.0 11.6 11.6 21.48 662.08 689.47 13.69 326.6 1.0 14.70 8.9 1.4 10.31
24.0 9.9 9.9 18.17 656.96 683.56 13.30 326.6 0.9 14.17 7.6 1.2 8.84
25.0 8.3 8.3 14.87 649.64 675.13 12.74 326.6 0.7 13.46 6.4 1.0 7.37
26.0 6.6 6.6 11.56 640.43 664.51 12.04 326.5 0.6 12.62 5.1 0.8 5.89
27.0 5.0 5.0 8.26 629.56 651.99 11.21 326.5 0.4 11.65 3.8 0.6 4.42
28.0 3.3 3.3 4.96 617.27 637.82 10.28 326.5 0.3 10.57 2.5 0.4 2.95
29.0 1.7 1.7 1.65 603.74 622.23 9.25 326.5 0.1 9.39 1.3 0.2 1.47
PEAK FLOWS
1 33 33 14 326.57 3 15 25 4 1 29
10860002-dra.xls
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EXHIBIT B-3 - INLET AND PIPE SIZING MAP
®SCALE: Hor: 1" = 20'
0 10' 20' 40'
C
!i'
its Barron Crest Subdivision
Stormwater Management Technical Design Summary Report
Ilni MBESI#1086-0002
Jib
PART 1—Executive Summary Report
Section 1 —Contact Information:
PPI
ii Project Designer: McClure and Browne Engineering and Surveying,Inc.
1008 Woodcreek Drive, Suite 103
College Station,TX 77845
979-693-3838
I Project Developer: BA Cathey Ltd
PO Box 9517
College Station,TX 77845
979-255-7064
Submittal Date: July 2014
ISection 2-General Information:
Barron Crest is a master planned community to be constructed in south College Station. The total area of
the development is approximately 9.9 acres with a total of 30 lots. The plan is based on the Preliminary Plat
I
submitted May 2014.
Section 3—Project Location:
0.
,,, Barron Crest is located in south College Station near the intersection of Barron Road and Fieldstone Place.
The entire project site is located within the city limits of College Station.
The entire site is located within the Spring Creek Drainage Basin. No portion of the site is shown to be
within the 100-year floodplain.(Fema Firm Map#48041C0325E).
Based on Table B-1, Appendix B of the Unified Stormwater Design Guidelines, this portion of Spring
Creek from S.H.6 upstream is required to have detention for flood control.
Section 4—Hydrologic Characteristics:
The project site is mostly open grass with some scattered trees. There are no well defined drainage swales
on the existing site. The site drains generally to the south and enters the Barron Road drainage system.
There are no existing drainage easements or ROW on the property. With this development drainage
easements will be provided along the paths of conveyance to the existing creek.
II
1 Stormwater Management Technical Design Summary Report Page 1 of 2
Barron Crest Subdivision
r
Section 5—Stormwater Management:
Stormwater will be conveyed by curb and gutter to recessed inlets. The stormwater will be discharged
directly into the proposed detention ponds where it will be released at a rate the meets the existing runoff rates from
the site. Proper end treatments and riprap stabilization will be used to prevent erosion.
' Section 6—Coordination and Permitting:
No coordination or permitting is required for this development.
Section 7—Reference:
' Exhibit A Appendix D—Technical Design Summary
Exhibit B-1 Existing Conditions
Exhibit B-2 Proposed Conditions
' Exhibit B-3 Inlet and Pipe Sizing
Exhibit C-1 Rational Formula Drainage Area Calculations
Exhibit C-2 Inlet Computations— 10 year storm
' Exhibit C-3 Inlet Computations— 100 year storm
Exhibit C-4 Pipe Size Calculations— 10 year storm
Exhibit C-5 Pipe Size Calculations— 100 year storm
Exhibit C-5 Hydraulic Grade Line— 10-Year Storm
' Exhibit C-6 Hydraulic Grade Line— 100-Year Storm
Exhibit D-1 Routing Results for Proposed Detention Pond
i
1
1
Stormwater Management Technical Design Summary Report Page 2 of 2
Barron Crest Subdivision
I
I
I
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
The Cities of Bryan and College Station both require storm drainage design to follow these
Unified Stormwater Design Guidelines. Paragraph C2 of Section III (Administration) requires
submittal of a drainage report in support of the drainage plan (stormwater management plan)
proposed in connection with land development projects, both site projects and subdivisions.
That report may be submitted as a traditional prose report, complete with applicable maps,
graphs, tables and drawings, or it may take the form of a "Technical Design Summary". The
format and content for such a summary report shall be in substantial conformance with the
description in this Appendix to those Guidelines. In either format the report must answer the
questions (affirmative or negative) and provide, at minimum, the information prescribed in the
"Technical Design Summary" in this Appendix.
The Stormwater Management Technical Design Summary Report shall include several parts
as listed below. The information called for in each part must be provided as applicable. In
addition to the requirements for the Executive Summary, this Appendix includes several
pages detailing the requirements for a Technical Design Summary Report as forms to be
I II completed. These are provided so that they may be copied and completed or scanned and
digitized. In addition, electronic versions of the report forms may be obtained from the City.
I Requirements for the means (medium) of submittal are the same as for a conventional report
as detailed in Section III of these Guidelines.
I Note: Part 1 — Executive Summary must accompany any drainage report
required to be provided in connection with any land development project,
regardless of the format chosen for said report.
INote: Parts 2 through 6 are to be provided via the forms provided in this
Appendix. Brief statements should be included in the forms as requested,
Ibut additional information should be attached as necessary.
Part 1 — Executive Summary Report
Part 2— Project Administration
Part 3— Project Characteristics
iii Part 4— Drainage Concept and Design Parameters
Part 5— Plans and Specifications
Part 6— Conclusions and Attestation
I r
h STORMWATER MANAGEMENT TECHNICAL DESIGN SUMMARY REPORT
Part 1 — Executive Summary
lb This is to be a brief prose report that must address each of the seven areas listed below.
I ma
Ideally it will include one or more paragraphs about each item.
1. Name, address, and contact information of the engineer submitting the report, and
of the land owner and developer (or applicant if not the owner or developer). The
date of submittal should also be included.
1
2. Identification of the size and general nature of the proposed project, including any
proposed project phases. This paragraph should also include reference to
ISTORMWATER DESIGN GUIDELINES Page 1 of 26 APPENDIX. D:TECH.DESIGN SUMMARY
Effective February 2007 As Revised February 2008
I
I
SECTION IX
is APPENDIX D - TECHNICAL DESIGN SUMMARY
applications that are in process with either City: plat(s), site plans, zoning requests,
or clearing/grading permits, as well as reference to any application numbers or
codes assigned by the City to such request.
I 3. The location of the project should be described. This should identify the Named
Regulatory Watershed(s) in which it is located, how the entire project area is
situated therein, whether the property straddles a watershed or basin divide, the
I approximate acreage in each basin, and whether its position in the Watershed
dictates use of detention design. The approximate proportion of the property in the
city limits and within the ETJ is to be identified, including whether the property
straddles city jurisdictional lines. If any portion of the property is in floodplains as
I described in Flood Insurance Rate Maps published by FEMA that should be
disclosed.
4. The hydrologic characteristics of the property are to be described in broad terms:
1 existing land cover; how and where stormwater drains to and from neighboring
properties; ponds or wetland areas that tend to detain or store stormwater; existing
creeks, channels, and swales crossing or serving the property; all existing drainage
I easements (or ROW) on the property, or on neighboring properties if they service
runoff to or from the property.
5. The general plan for managing stormwater in the entire project area must be
I outlined to include the approximate size, and extent of use, of any of the following
features: storm drains coupled with streets; detention / retention facilities; buried
conveyance conduit independent of streets; swales or channels; bridges or culverts;
I outfalls to principal watercourses or their tributaries; and treatment(s) of existing
watercourses. Also, any plans for reclaiming land within floodplain areas must be
outlined.
6. Coordination and permitting of stormwater matters must be addressed. This is to
include any specialized coordination that has occurred or is planned with other
entities (local, state, or federal). This may include agencies such as Brazos County
government, the Brazos River Authority, the Texas A&M University System, the
Texas Department of Transportation, the Texas Commission for Environmental
Quality, the US Army Corps of Engineers, the US Environmental Protection Agency,
et al. Mention must be made of any permits, agreements, or understandings that
pertain to the project.
7. Reference is to be made to the full drainage report (or the Technical Design
Summary Report) which the executive summary represents. The principal
I elements of the main report (and its length), including any maps, drawings or
construction documents, should be itemized. An example statement might be:
"One -page drainage report dated , one set of
I construction drawings ( sheets) dated , and a
-page specifications document dated comprise
the drainage report for this project."
OW
1 ill
ISTORMWATER DESIGN GUIDELINES Page 2 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
I
I
I SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
IPart 2 — Project Administration Start (Page 2.1)
Engineering and Design Professionals Information
Engineering Firm Name and Address: Jurisdiction
I
McClure & Browne Engineering/Surveying, Inc. City: Bryan
1008 Woodcreek Dr., Ste. 103 X College Station
I College Station, Tx 77845 Date of Submittal: June 2014
Lead Engineer's Name and Contact Info.(phone, e-mail, fax): I Other:
Jeffery Robertson, PE, PH: 693-3838, FX: 693-2554, jeffr@mcclurebrowne.com
ISupporting Engineering / Consulting Firm(s): Other contacts
IDeveloper/ Owner/Applicant Information
Developer/Applicant Name and Address: Phone and e-mail:
r BA Cathey Ltd. PH: 979-255-7064
c College Station, Tx 77802 blakecathey@yahoo.com
I
Property Owner(s) if not Developer/ Applicant(& address): Phone and e-mail:
IP Project Identification
Development Name: Barron Crest Subdivision
Is subject property a site project, a single-phase subdivision, or part of a multi-phase subdivision?
No If multi-phase, subject property is phase of .
6 Legal description of subject property(phase) or Project Area:
(see Section II, Paragraph B-3a)
I
' If subject property (phase) is second or laterphase of a project, describe general status of all
P P Y �
earlier phases. For most recent earlier phase Include submittal and review dates.
Ii.
I General Location of Project Area, or subject property (phase):
Intersection of Barron Road and Fieldstone Place
ii In City Limits? Extraterritorial Jurisdiction (acreage):
Bryan: acres. Bryan: College Station:
College Station: 9.9 acres. Acreage Outside ETJ:
a
I ' STORMWATER DESIGN GUIDELINES Page 3 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2— Project Administration Continued (page 2.2)
Project Identification (continued)
Roadways abutting or within Project Area or Abutting tracts, platted land, or built
it
subject property: developments:
Barron Road & Hofburg Drive Undeveloped Land owned by Gene
Savage and Charles Carnes
No
Named Regulatory Watercourse(s) &Watershed(s): Tributary Basin(s):
Spring Creek
Plat Information For Project or Subject Property(or Phase)
Preliminary Plat File#: Final Plat File#: Date:
Name: Status and Vol/Pg:
M If two plats, second name: File#:
Status: Date:
awa
Zoning Information For Project or Subject Property (or Phase)
Zoning Type: GS Existing or Proposed? Case Code:
Case Date Status: Existing
Zoning Type: Existing or Proposed? Case Code:
vro
Case Date Status:
Stormwater Management Planning For Project or Subject Property (or Phase)
r..
Planning Conference(s) & Date(s): Participants:
Imp Preliminary Report Required? Submittal Date Review Date
Review Comments Addressed? Yes No In Writing? When?
Compliance With Preliminary Drainage Report. Briefly describe (or attach documentation
explaining) any deviation(s)from provisions of Preliminary Drainage Report, if any.
1rr
ews
ear»
STORMWATER DESIGN GUIDELINES Page 4 of 26 APPENDIX. D:TECH.DESIGN SUMMARY
Ira
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 2 — Project Administration Continued (page 2.3)
Coordination For Project or Subject Property (or Phase)
Note: For any Coordination of stormwater matters indicated below, attach documentation
describing and substantiating any agreements, understandings, contracts, or approvals.
Coordination Dept. Contact: Date: Subject:
With Other
Departments of
Jurisdiction
City(Bryan or
College Station)
Coordination With Summarize need(s)&actions taken (include contacts &dates):
Non-jurisdiction
City Needed?
Yes No X
Coordination with Summarize need(s)&actions taken (include contacts &dates):
Brazos County
Needed?
Yes No X
in
Coordination with Summarize need(s)&actions taken (include contacts&dates):
TxDOT Needed?
Yes No X
Coordination with Summarize need(s)&actions taken (include contacts &dates):
TAMUS Needed?
Yes No X
Permits For Project or Subject Property(or Phase)
As to stormwater management, are permits required for the proposed work from any of the entities
listed below? If so, summarize status of efforts toward that objective in spaces below.
Entity Permitted or Status of Actions (include dates)
Approved ?
US Army Crops of
Engineers
No X Yes
US Environmental
Protection Agency
No X Yes
Texas Commission on
Environmental Quality
No X Yes
r 1
Brazos River
Authority
NoX Yes
I
116
fa
STORMWATER DESIGN GUIDELINES Page 5 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
is" Effective February 2007 As Revised February 2008
I
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Start (Page 3.1)
Nature and Scope of Proposed Work
Existing: Land proposed for development currently used, including extent of impervious cover?
Land is currently open with scattered trees.
1
Site Redevelopment of one platted lot, or two or more adjoining platted lots.
Development Building on a single platted lot of undeveloped land.
Project Building on two or more platted adjoining lots of undeveloped land.
(select all Building on a single lot, or adjoining lots, where proposed plat will not form
[ applicable) a new street(but may include ROW dedication to existing streets).
ill Other(explain):
Subdivision Construction of streets and utilities to serve one or more platted lots.
Development X Construction of streets and utilities to serve one or more proposed lots on
Project lands represented by pending plats.
Site proiects: building use(s), approximate floor space, impervious cover ratio.
Describe Subdivisions: number of lots by general type of use, linear feet of streets and
Nature and drainage easements or ROW.
Size of 30 Lots - Single Family Residential
Proposed 1 Lot- School
II Project Streets - 1,150 LF
Is any work planned on land that is not platted If yes, explain:
or on land for which platting is not pending?
11116 X No Yes
IFEMA Floodplains
Is any part of subject property abutting a Named Regulatory Watercourse No X Yes
(Section II, Paragraph B1)or a tributary thereof?
Is any part of subject property in floodplain No Yes X Rate Map 48041 C0325E
area of a FEMA-regulated watercourse?
Encroachment(s) Encroachment purpose(s): Building site(s) Road crossing(s)
into Floodplain
areas planned? Utility crossing(s) Other(explain):
am No X
NI Yes
Mill If floodplain areas not shown on Rate Maps, has work been done toward amending the FEMA-
approved Flood Study to define allowable encroachments in proposed areas? Explain.
mo
I
I is
to STORMWATER DESIGN GUIDELINES Page 6 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
II
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.2)
Hydrologic Attributes of Subject Property(or Phase)
Has an earlier hydrologic analysis been done for larger area including subject property?
or Yes Reference the study(&date) here, and attach copy if not already in City files.
Is the stormwater management plan for the property in substantial conformance with the
,., earlier study? Yes No If not, explain how it differs.
Oft
No If subject property is not part of multi-phase project, describe stormwater management
X plan for the property in Part 4.
If property is part of multi-phase project, provide overview of stormwater management plan
for Project Area here. In Part 4 describe how plan for subject property will comply
therewith.
Do existing topographic features on subject property store or detain runoff? X No Yes
Describe them (include approximate size, volume, outfall, model, etc).
r..
Any known drainage or flooding problems in areas near subject property? _x _No Yes
oro Identify:
PIM
Based on location of study property in a watershed, is Type 1 Detention (flood control) needed?
(see Table B-1 in Appendix B)
X Detention is required. Need must be evaluated. Detention not required.
What decision has been reached? By whom?
If the need for
Type 1 Detention How was determination made?
must be evaluated:
PIM
STORMWATER DESIGN GUIDELINES Page 7 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.3)
Hydrologic Attributes of Subject Property (or Phase) (continued)
Does subject property straddle a Watershed or Basin divide? X No Yes If yes,
describe splits below. In Part 4 describe design concept for handling this.
Watershed or Basin Larger acreage Lesser acreage
SPIN
it
Above-Project Areas(Section II, Paragraph B3-a)
Does Project Area (project or phase) receive runoff from upland areas? X No Yes
Size(s)of area(s)in acres: 1) 2) 3) 4)
Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable
concentrated section(s), small creek(non-regulatory), regulatory Watercourse or tributary);
i" Flow determination: Outline hydrologic methods and assumptions:
Does storm runoff drain from public easements or ROW onto or across subject property?
No Yes If yes, describe facilities in easement or ROW:
Are changes in runoff characteristics subject to change in future? Explain
OPP
ir.
Conveyance Pathways (Section II, Paragraph C2)
Must runoff from study property drain across lower properties before reaching a Regulatory
Watercourse or tributary? X No Yes
Describe length and characteristics of each conveyance pathway(s). Include ownership of
property(ies).
Olt
MIPS
STORMWATER DESIGN GUIDELINES Page 8 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
�"" Effective February 2007 As Revised February 2008
Ebb
NO" SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 3 — Property Characteristics Continued (Page 3.4)
Hydrologic Attributes of Subject Property (or Phase) (continued)
Conveyance Pathways (continued)
Do drainage If yes, for what part of length? % Created by? plat, or
easements instrument. If instrument(s), describe their provisions.
exist for any
part of
pathway(s)?
No
Yes
Where runoff must cross lower properties, describe characteristics of abutting lower
property(ies). (Existing watercourses? Easement or Consent aquired?)
I"' Pathway
Areas
.. Describe any built or improved drainage facilities existing near the property(culverts,
bridges, lined channels, buried conduit, swales, detention ponds, etc).
Nearby
Drainage Do any of these have hydrologic or hydraulic influence on proposed stormwater
Facilities design? No Yes If yes, explain:
1
f
STORMWATER DESIGN GUIDELINES Page 9 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.2)
Stormwater Management Concept (continued)
Within Prosect Area Of Multi-Phase Project
Identify gaining Basins or Watersheds and acres shifting:
Will project result
in shifting runoff
between Basins or
between What design and mitigation is used to compensate for increased runoff
Watersheds? from gaining basin or watershed?
X No
Yes
How will runoff from Project 1. With facility(ies) involving other development projects.
Area be mitigated to pre-
2. X Establishing features to serve overall Project Area.
development conditions?
Select any or all of 1, 2, 3. On phase (or site) project basis within Project Area.
and/or 3, and explain below.
1. Shared facility(type& location of facility; design drainage area served; relationship to size of
Project Area): (Attached Exhibit#
2. For Overall Project Area (type & location of facilities): (Attached Exhibit#
Proposed Detention Pond at intersection of Barron Road and Crestmont.
Dry pond with sloped headwall control structure connected to existing inlet on
Barron Road.
3. By phase (or site) proiect: Describe planned mitigation measures for phases (or sites)in
subsequent questions of this Part.
Are aquatic echosystems proposed? No Yes In which phase(s)or
project(s)?
N u,
>_ Are other Best Management Practices for reducing stormwater pollutants proposed?
a. No Yes Summarize type of BMP and extent of use:
w
c
0)
w
a,
o z
If design of any runoff-handling facilities deviate from provisions of B-CS Technical
X Specifications, check type facility(ies)and explain in later questions.
IL) Detention elements Conduit elements Channel features
Swales Ditches Inlets Valley gutters Outfalls
Culvert features Bridges Other
I
STORMWATER DESIGN GUIDELINES Page 11 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
I
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.3)
Stormwater Management Concept(continued)
Within Prosect Area Of Multi-Phase Project(continued)
Will Project Area include bridge(s)or culvert(s)? X No Yes Identify type and
general size and In which phase(s).
orr
110100
If detention/retention serves (will serve)overall Project Area, describe how it relates to subject
w,. phase or site project(physical location, conveyance pathway(s), construction sequence):
The proposed detention pond will be built with this phase.
WOO
Within Or Serving Subject Property(Phase, or Site)
If property part of larger Project Area, is design in substantial conformance with earlier analysis
and report for larger area? Yes No, then summarize the difference(s):
Identify whether each of the types of drainage features listed below are included, extent of use,
and general characteristics.
Typical shape? Surfaces?
.r. C‘.
°�,' N Steepest side slopes: Usual front slopes: Usual back slopes:
a)
Flow line slopes: least Typical distance from travelway:
(Attached Exhibit#
o typical greatest
-csC,, z
o X Are longitudinal culvert ends in compliance with B-CS Standard Specifications?
+.� Q Yes No, then explain:
So
ti) At intersections or otherwise, do valley gutters cross arterial or collector streets?
,., _X _No Yes If yes explain:
U 13
4?
s uX
UAre valley gutters proposed to cross any street away from an intersection?
z X _No Yes Explain: (number of locations?)
s.
STORMWATER DESIGN GUIDELINES Page 12 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
r Effective February 2007 As Revised February 2008
I
II SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.4)
Stormwater Management Concept(continued)
I
Within Or Serving Subject Property(Phase, or Site) (continued)
Gutter line slopes: Least_0.69% Usual.2.0% _ Greatest_3.19%
1 Are inlets recessed on arterial and collector streets? Yes X No If"no",
identify where and why. No collector roadways.
Will inlets capture 10-year design stormflow to prevent flooding of intersections (arterial
Lwith arterial or collector)? X Yes No If no, explain where and why not.
0--
m
= Will inlet size and placement prevent exceeding allowable water spread for 10-year
CB design storm throughout site (or phase)? _X_Yes No If no, explain.
a)
r i,
" °'' Sag curves:Are inlets placed at low points? X Yes No Are inlets and
-g conduit sized to prevent 100-year stormflow from ponding at greater than 24 inches?
o X Yes No Explain "no" answers.
E _. .
,... ,......
(13
a)
2
1119. V)
2 Will 100-yr stormflow be contained in combination of ROW and buried conduit on
"" Q whole length of all streets? X Yes No If no, describe where and why.
PM
iiii
Do designs for curb, gutter, and inlets comply with B-CS Technical Specifications?
_X,Yes No If not, describe difference(s) and attach justification.
pip Are any 12-inch laterals used? X No Yes Identify length(s)and where
used.
MN
NPipe runs between system Typical_90' Longest 142'
m a access points (feet):
aa)XAre junction boxes used at each bend? Yes X No If not, explain where
I and why• HDPE Bend adjacent to headwall.
Til z
E
.. ° Are downstream soffits at or below upstream soffits? Least amount that hydraulic
ma u) Yes X No If not, explain where and why: grade line is below gutter line
— (system-wide):
1.37' (10-year)
STORMWATER DESIGN GUIDELINES Page 13 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
I
I SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
IPart 4— Drainage Concept and Design Parameters Continued (Page 4.5)
Stormwater Management Concept (continued)
IWithin Or Serving Subject Property(Phase, or Site) (continued)
Describe watercourse(s), or system(s) receiving system discharge(s) below
(include design discharge velocity, and angle between converging flow lines).
mIii 1) Watercourse (or system), velocity, and angle?
SD-1, 4.3 fps, 0 deg.
1 IIP" `'
0
m E 2) Watercourse (or system),velocity, and angle?
L-
c o
C d
o v-
0 C
Ear
lam a) E — 3)Watercourse (or system), velocity, and angle?
2 g3T
c :0 0
IN T2 O
i "a a
E m For each outfall above, what measures are taken to prevent erosion or scour of
receiving and all facilities at juncture?
CO co
a) 1) SD-1 - Rock rip-rap at end of headwall.
1
L
co
Q
2)
11
u)
0 3)
I Are swale(s)situated along property lines between properties? No Yes
Number of instances: For each instance answer the following questions.
Surface treatments (including low-flow flumes if any):
Iu)
a)
U , Flow line slopes (minimum and maximum):
0
U Z Outfall characteristics for each (velocity, convergent angle, &end treatment).
U)
°'X
Ts
"ft . Will 100-year design storm runoff be contained within easement(s)or platted drainage
ROW in all instances? Yes No If"no" explain:
pi, i
STORMWATER DESIGN GUIDELINES Page 14 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.6)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
lir
Are roadside ditches used? No Yes If so, provide the following:
) Is 25-year flow contained with 6 inches of freeboard throughout? Yes No
0 Are top of banks separated from road shoulders 2 feet or more? Yes No
Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes No
a)
For any"no"answers provide location(s)and explain:
as
0
Ohm
If conduit is beneath a swale, provide the following information (each instance).
IMO Instance 1 Describe general location, approximate length:
O Is 100-year design flow contained in conduit/swale combination? Yes No
``w If "no"explain:
.v 0 as Space for 100-year storm flow? ROW Easement Width
Z .c Swale Surface type, minimum Conduit Type and size, minimum and maximum
X s and maximum slopes: slopes, design storm:
• m Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type):
c
as c
- as
U
Obi c
o o Access Describe how maintenance access is provided (to swale, into conduit):
E
O• 0
NIS m
= c
.S .a) Instance 2 Describe general location, approximate length:
a>
E
c a Is 100-year design flow contained in conduit/swale combination? Yes No
o If "no"explain:
n
E a) Space for 100-year storm flow? ROW Easement Width
O c
O CD Swale Surface type, minimum Conduit Type and size, minimum and maximum
cu and maximum slopes: slopes, design storm:
co as
TInlets Describe how conduit is loaded (from streets/storm drains, inlets by type):
a)
m c
3 0
Access Describe how maintenance access is provided (to swale, into conduit):
STORMWATER DESIGN GUIDELINES Page 15 of 26 APPENDIX. D:TECH.DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.7)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site)(continued)
If"yes" provide the following information for each instance:
Instance 1 Describe general location, approximate length, surfacing:
c
iibto
CT,
o w
S
uj Is 100-year design flow contained in swale? Yes No Is swale wholly
r■. C >- within drainage ROW? Yes No Explain "no" answers:
a)
2Access Describe how maintenance access is provide:
• z
410.
0 Cx
Ito • Instance 2 Describe general location, approximate length, surfacing:
a)
L �
Pow -0
- m
L a)
Ki Is 100-year design flow contained in swale? Yes No Is swale wholly
a �' within drainage ROW? Yes No Explain "no" answers:
0
To
(i) O
▪ rX Access Describe how maintenance access is provided:
U_
r Q
Instance 3,4, etc. If swales are used in more than two instances, attach sheet
providing all above information for each instance.
lio
"New" channels: Will any area(s)of concentrated flow be channelized (deepened,
widened, or straightened)or otherwise altered? No Yes If only slightly
shaped, see"Swales" in this Part. If creating side banks, provide information below.
C•-•
a®' .0 Will design replicate natural channel? Yes No If"no", for each instance
o a describe section shape &area, flow line slope (min. & max.), surfaces, and 100-year
' o w design flow, and amount of freeboard:
u)- Instance 1:
c
a)
E
a)
o Instance 2:
o
z
m
2 X Instance 3:
ca
L
U
STORMWATER DESIGN GUIDELINES Page 16 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
E
II
Ei SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
IPart 4— Drainage Concept and Design Parameters Continued (Page 4.8)
Stormwater Management Concept(continued)
I Within Or Serving Subject Property(Phase, or Site) (continued)
Existing channels (small creeks): Are these used? No Yes
If"yes" provide the information below.
I Will small creeks and their floodplains remain undisturbed? Yes No How
many disturbance instances? Identify each planned location:
IFor each location, describe length and general type of proposed improvement
(including floodplain changes):
I
For each location, describe section shape&area, flow line slope (min. & max.),
1 I surfaces, and 100-year design flow.
1
m
c
c
."c Watercourses (and tributaries): Aside from fringe changes, are Regulatory
1 [ o
• Watercourses proposed to be altered? No Yes Explain below.
c Submit full report describing proposed changes to Regulatory Watercourses. Address
E existing and proposed section size and shape, surfaces, alignment, flow line changes,
I
• length affected, and capacity, and provide full documentation of analysis procedures
n and data. Is full report submitted? Yes No If"no"explain:
E
71)
o
All Proposed Channel Work: For all proposed channel work, provide information
0
requested in next three boxes.
1 I If design is to replicate natural channel, identify location and length here, and describe
design in Special Design section of this Part of Report.
Will 100-year flow be contained with one foot of freeboard? Yes No If
not, identify location and explain:
I
I
Are ROW/easements sized to contain channel and required maintenance space?
Yes No If not, identify location(s)and explain:
1
STORMWATER DESIGN GUIDELINES Page 17 of 26 APPENDIX. D:TECH.DESIGN SUMMARY
Effective February 2007 As Revised February 2008
I
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.9)
Stormwater Management Concept(continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
How many facilities for subject property project? For each provide info. below.
,, For each dry-type facilitiy: Facility 1 Facility 2
Acres served &design volume+ 10% 5.7ac i 0.7 ac-ft
ow
100-yr volume:free flow& plugged 0.6ac 0.7 ac-ft
` Design discharge (10 yr&25 yr) 17cfs 21 cfs
Spillway crest at 100-yr WSE? X yes no yes no
Berms 6 inches above plugged WSE? X yes no yes no
[ Explain any"no" answers:
cn
a)
>-
X
For each facility what is 25-yr design Q, and design of outlet structure?
z Facility 1: X
Facility 2:
Do outlets and spillways discharge into a public facility in easement or ROW?
I
) Facility 1: X Yes No Facility 2: Yes No
If"no" explain:
0
a
I
o
ri
m For each, what is velocity of 25-vr design discharge at outlet? &at spillway?
= Facility 1:_6.4 fps &_0.0 fps _ Facility 2: &
I as
u0 Are energy dissipation measures used? No X Yes Describe type and
o location: Rock
c
a)
1
a
a>
< For each, is spillway surface treatment other than concrete? Yes or no, and describe:
' Facility 1: Grass Sod
Facility 2:
For each, what measures are taken to prevent erosion or scour at receiving facility?
IFacility 1: Receiving Facility is concrete. Rock Riprap is placed
Facility 2: upstream of it.
I If berms are used give heights, slopes and surface treatments of sides.
Facility 1: 4' 4:1 grass sod
Facility 2:
r
1 iii.
STORMWATER DESIGN GUIDELINES Page 18 of 26 APPENDIX. D:TECH.DESIGN SUMMARY
ab Effective February 2007 As Revised February 2008
II
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.10)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Do structures comply with B-CS Specifications? Yes or no, and explain if"no":
Facility 1; Yes
JIMm
410
L Facility 2:
c :r
• c
▪ o
U
o ., For additional facilities provide all same information on a separate sheet.
t Are parking areas to be used for detention? _X No Yes What is
maximum depth due to required design storm?
Roadside Ditches: Will culverts serve access driveways at roadside ditches?
No Yes If"yes", provide information in next two boxes.
Will 25-yr. flow pass without flowing over driveway in all cases? Yes No
Without causing flowing or standing water on public roadway? Yes No
Designs &materials comply with B-CS Technical Specifications? Yes No
Explain any"no" answers:
C
c
oU } Are culverts parallel to public roadway alignment? Yes No Explain:
�
a)
(0
Q Creeks at Private Drives: Do private driveways, drives, or streets cross drainage
▪ ways that serve Above-Project areas or are in public easements/ROW?
0
z No Yes If"yes" provide information below.
' • x How many instances? Describe location and provide information below.
o• Location 1:
U
111
v Location 2:
Q
Location 3:
For each location enter value for: 1 2 3
Design year passing without toping travelway?
Water depth on travelway at 25-year flow?
Water depth on travelway at 100-year flow?
For more instances describe location and same information on separate sheet.
STORMWATER DESIGN GUIDELINES Page 19 of 26 APPENDIX. D:TECH.DESIGN SUMMARY
""' Effective February 2007 As Revised February 2008
I
SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.11)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Named Regulatory Watercourses(&Tributaries): Are culverts proposed on these
facilities? _X_No Yes, then provide full report documenting assumptions,
criteria, analysis, computer programs, and study findings that support proposed
design(s). Is report provided? Yes No If"no", explain:
.60
Arterial or Maior Collector Streets: Will culverts serve these types of roadways?
1.0
- No Yes How many instances? For each identify the
„�. location and provide the information below.
} a Instance 1:
bar
cp Instance 2:
o Instance 3:
c
li g
o .7 Yes or No for the 100-year design flow: 1 2 3
zE
o Headwater WSE 1 foot below lowest curb top?
X c
a, Spread of headwater within ROW or easement?
Is velocity limited per conditions (Table C-11)?
Explain any"no" answer(s):
o c
v o
T fQ
(Q
taw o Minor Collector or Local Streets: Will culverts serve these types of streets?
,., I) • X No Yes How many instances? for each identify the
location and provide the information below:
las Ca
C, Instance 1:
*•Y • c Instance 2:
CD• o Instance 3:
CD
• 0 For each instance enter value, or"yes"/"no"for: 1 2 3
• CO
( Design yr. headwater WSE 1 ft. below curb top?
Q .a) 100-yr. max. depth at street crown 2 feet or less?
E Product of velocity(fps)&depth at crown (ft)= ?
o Is velocity limited per conditions (Table C-11)?
Limit of down stream analysis (feet)?
Explain any"no" answers:
rr
STORMWATER DESIGN GUIDELINES Page 20 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.12)
i
Stormwater Management Concept (continued)
' Within Or Serving Subject Property(Phase, or Site)(continued)
All Proposed Culverts: For all proposed culvert facilities (except driveway/roadside
ditch intersects) provide information requested in next eight boxes.
Do culverts and travelways intersect at 90 degrees? Yes No If not,
identify location(s)and intersect angle(s), and justify the design(s):
Does drainage way alignment change within or near limits of culvert and surfaced
approaches thereto? No Yes If"yes" identify location(s), describe
change(s), and justification:
1
Are flumes or conduit to discharge into culvert barrel(s)? No Yes If yes,
identify location(s)and provide justification:
ii p
Are flumes or conduit to discharge into or near surfaced approaches to culvert ends?
cu
No Yes If"yes" identify location(s), describe outfall design treatment(s):
r�r c
0
U
�sw U
a)
or Is scour/erosion protection provided to ensure long term stability of culvert structural
components, and surfacing at culvert ends? Yes No If"no" Identify
locations and provide justification(s):
Will 100-yr flow and spread of backwater be fully contained in street ROW, and/or
drainage easements/ROW? Yes No if not, why not?
Do appreciable hydraulic effects of any culvert extend downstream or upstream to
' neighboring land(s)not encompassed in subject property? No Yes If
"yes"describe location(s)and mitigation measures:
Are all culvert designs and materials in compliance with B-CS Tech. Specifications?
Yes No If not, explain in Special Design Section of this Part.
am
U
STORMWATER DESIGN GUIDELINES Page 21 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
r
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.13)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site)(continued)
Is a bridge included in plans for subject property project? X No Yes
If"yes" provide the following information.
Name(s)and functional classification of the roadway(s)?
4110,
..
What drainage way(s) is to be crossed?
a)
A full report supporting all aspects of the proposed bridge(s) (structural, geotechnical,
hydrologic, and hydraulic factors)must accompany this summary report. Is the report
provided? Yes No If"no"explain:
Is a Stormwater Provide a general description of planned techniques:
Pollution Prevention An erosion control drawing has been included with
Plan (SW3P)
established for the plans. The SW3P will be the responsibility of
c
m project construction? the contractor.
X
No Yes
Special Designs—Non-Traditional Methods
Are any non-traditional methods (aquatic echosystems, wetland-type detention, natural stream
replication, BMPs for water quality, etc.) proposed for any aspect of subject property project?
et
X No Yes If"yes" list general type and location below.
+rr
w.
Provide full report about the proposed special design(s) including rationale for use and
expected benefits. Report must substantiate that stormwater management objectives will not
be compromised, and that maintenance cost will not exceed those of traditional design
solution(s). Is report provided? Yes No If"no"explain:
4111.
STORMWATER DESIGN GUIDELINES Page 22 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Olio
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.14)
Stormwater Management Concept (continued)
Within Or Serving Subject Property(Phase, or Site) (continued)
Special Designs—Deviation From B-CS Technical Specifications
If any design(s)or material(s)of traditional runoff-handling facilities deviate from provisions of
B-CS Technical Specifications, check type facility(ies)and explain by specific detail element.
Detention elements Drain system elements Channel features
Culvert features Swales Ditches Inlets Outfalls
'"" Valley gutters Bridges (explain in bridge report)
In table below briefly identify specific element,justification for deviation(s).
Specific Detail Element Justification for Deviation (attach additional sheets if needed)
FPI
1)
2)
imo
3)
I—
4)
5)
Have elements been coordinated with the City Engineer or her/his designee? For each item
above provide"yes" or"no", action date, and staff name:
1)
ern 2)
3)
4)
5)
Design Parameters
Hydrology
Is a map(s)showing all Design Drainage Areas provided? X Yes No
Briefly summarize the range of applications made of the Rational Formula:
Determination of flow rates for inlets and pipes along the roadway.
apsx
What is the size and location of largest Design Drainage Area to which the Rational Formula
has been applied? 5.7 _acres Location (or identifier): Prop2
STORMWATER DESIGN GUIDELINES Page 23 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.15)
Alikor
Design Parameters(continued)
401.
Hydrology(continued)
In making determinations for time of concentration, was segment analysis used?
X_No Yes In approximately what percent of Design Drainage Areas?
As to intensity-duration-frequency and rain depth criteria for determining runoff flows, were any
criteria other than those provided in these Guidelines used? _X_No Yes If"yes"
identify type of data, source(s), and where applied:
101.
For each of the stormwater management features listed below identify the storm return
frequencies (year)analyzed (or checked), and that used as the basis for design.
r Feature Analysis Year(s) Design Year
Storm drain system for arterial and collector streets 10, 100 10, 100
Storm drain system for local streets 10, 100 10, 100
Open channels N/A N/A
Swale/buried conduit combination in lieu of channel N/A N/A
Swales N/A N/A
Roadside ditches and culverts serving them N/A N/A
1111.
Detention facilities: spillway crest and its outfall N/A N/A
iitar
Detention facilities: outlet and conveyance structure(s) N/A N/A
oi' Detention facilities: volume when outlet plugged N/A N/A
Culverts serving private drives or streets N/A N/A
Culverts serving public roadways 2,5,10,25,50,100 2,5,10,25,50,100
OPP
iw
Bridges: provide in bridge report. N/A N/A
Hydraulics
What is the range of design flow velocities as outlined below?
Design flow velocities; Gutters Conduit Culverts Swales Channels
Highest(feet per second) 5.7 10.8
NPR
Lowest(feet per second) 0.00 3.24
Streets and Storm Drain Systems Provide the summary information outlined below:
Roughness coefficients used: For street gutters: _0.018
For conduit type(s) RCP HDPE Coefficients: 0.013 0.012
4411*
STORMWATER DESIGN GUIDELINES Page 24 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Ow
Effective February 2007 As Revised February 2008
SECTION IX
APPENDIX D - TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.16)
Design Parameters (continued)
Hydraulics(continued)
Street and Storm Drain Systems (continued)
For the following, are assumptions other than allowable per Guidelines?
Inlet coefficients? X No Yes Head and friction losses X No Yes
it Explain any"yes" answer:
+r. In conduit is velocity generally increased in the downstream direction? _X_Yes No
Are elevation drops provided at inlets, manholes, and junction boxes? X Yes No
Explain any"no" answers:
Are hydraulic grade lines calculated and shown for design storm? X Yes No
For 100-year flow conditions? X Yes No Explain any"no"answers:
What tailwater conditions were assumed at outfall point(s)of the storm drain system? Identify
each location and explain:
"a Soffit Elevation of receiving facility
kip
Open Channels If a HEC analysis is utilized, does it follow Sec VI.F.5.a? X Yes No
rw
Outside of straight sections, is flow regime within limits of sub-critical flow? X Yes No
._ If"no" list locations and explain:
Nall
,.. Culverts If plan sheets do not provide the following for each culvert, describe it here.
For each design discharge, will operation be outlet(barrel)control or inlet control?
kiss
Entrance, friction and exit losses:
Entrance Coef.: 0.50
66
Exit Coef: 1.0
.. Friction 'n': 0.014
Bridges Provide all in bridge report
err
STORMWATER DESIGN GUIDELINES Page 25 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
Effective February 2007 As Revised February 2008
ope
Milli
SECTION IX
APPENDIX D — TECHNICAL DESIGN SUMMARY
Part 4— Drainage Concept and Design Parameters Continued (Page 4.17)
Design Parameters(continued)
Computer Software
What computer software has been used in the analysis and assessment of stormwater
management needs and/or the development of facility designs proposed for subject property
project? List them below, being sure to identify the software name and version, the date of the
4111*
version, any applicable patches and the publisher
Microsoft Excel Spreadsheet
Part 5 — Plans and Specifications
Requirements for submittal of construction drawings and specifications do not differ due to use of a
Technical Design Summary Report. See Section III, Paragraph C3.
Part 6— Conclusions and Attestation
Conclusions
Add any concluding information here:
kms,
,. Attestation
Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical
Design Summary Drainage Report by signing and sealing below.
"This report(plan) for the drainage design of the development named in Part B was prepared
by me (or under my supervision) in accordance with provisions of the Bryan/College Station
us Unified Drainage Design Guidelines for the owners of the property. All licenses and permits
required by any and all state and federal regulatory agencies for the proposeet'r7fWn
s impro ements have been issued or fall under applicable general permits."
' 'Sr.* 74
r r•T _ ��;
•••••' s`3t2
(Affix Seal) ,'
•
'""' Vilm JEFFE Y L. POrt RT.,CO
Lica ,s:• ''rofessional Engineer �•••
:. 9 1 7 c. 5 :t}.✓
0071-c XPi � :� � �.
, .•o
State of Texas PE No. (� Fr'° e�
......`•r ',�;
Q M WPM )
STORMWATER DESIGN GUIDELINES Page 26 of 26 APPENDIX. D:TECH. DESIGN SUMMARY
�""` Effective February 2007 As Revised February 2008
\1
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EXHIBIT C-1
Rational Formula Drainage Area Calculations
Barron Crest Subdivision
o 0 3 3 i
<• 0a Q '. I- LL LL-❑ ❑ of JO 1 I
0 .71
a f W L , 5F 5 r to - moi .
QZ r oWaW y ' > ,- wz w-J FZ F� 0 8
O Z C ' Q O >W >Q 7 W o Q W m Si8I: 8 O C N N `. O 8 e
❑ r 7 Q � I a �- O� OLL C7� oil. > U 7 `=� Q I 1B O _ O N O I '^ O _ O
NO. AC. 0.4 0.55 0.9 ft. ft. ft. ft. ft/s min min In/Hr cfs In/Hr cfs In/Hr cfs In/Hr cfs In/Hr cfs In/Hr cfs
Ex1 1.76 1.76 0.00 0.00 0.70 100.0 1.0 1.0 1.0 0.7 2.4 10.0 6.33 4.5 7.7 5.4 8.6 6.1 9.9 6.9 11.1 7.8 12.5 8.8
Prop1 1.24 0.00 1.24 0.00 0.68 100.0 1.0 1.0 1.0 0.7 2.4 10.0 6.33 4.3 7.7 5.2 8.6 5.9 9.9 6.7 11.1 7.6 12.5 8.5
Si Ex2 5.70 5.70 0.00 0.00 2.28 215.0 2.0 98.0 1.0 0.9 6.1 10.0 6.33 14.4 7.7 17.5 8.6 19.7 9.9 22.5 11.1 25.4 12.5 28.6
Ex3 0.66 0.00 0.66 0.00 0.36 150.0 2.0 175.0 2.0 1.2 4.4 10.0 6.33 2.3 7.7 2.8 8.6 3.1 9.9 3.6 11.1 4.0 12.5 4.5
Prop2 5.70 1.14 4.56 0.00 2.96 215.0 2.0 98.0 1.0 0.9 6.1 10.0 6.33 18.8 7.7 22.8 8.6 25.6 9.9 29.2 11.1 33.0 12.5 37.1
I _ Prop3 0.47 0.00 0.47 0.00 0.26 50.0 1.0 150.0 2.0 1.7 1.9 10.0 6.33 1.6 7.7 2.0 8.6 2.2 9.9 2.5 11.1 2.9 12.5 3.2
1.01 1.22 0.00 1.22 0.00 0.67- 100.0 1.0 440.0 5.0 1.5 5.8 10.0 6.33 4.2 7.7 5.2 8.6 5.8 9.9 6.6 11.1 7.5 12.5 8.4
1.02 1.84 0.00 1.84 0.00 1.01 2.0 2.0 2.0 2.0 10.4 0.0 10.0 6.33 6.4 7.7 7.8 8.6 8.7 9.9 10.0 11.1 11.3 12.5 12.7
I
I
1
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I 10/15/2014
10860002-dra.xis
Exhibit C-1
I
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IEXHIBIT C-2
10 YEAR INLET COMPUTATIONS
/y Barron Crest Subdivision
sL i .ted. W L .c • X67 ci
't 3 L 6> L
zz o a 3 z a a C 6 4 x 0.
g d ° L V c 6 c A; U o d i i
O A A a F r/� .; E✓ DESCRIPTION U ,.j ,.a a A. U d d
Curb Inlet Grate Inlet
cfs cfs ft ft ft cfs sq-ft sq-ft
1.01 na 5.8 0.0 5.8 27 1.01 5.8 Recessed Low Point Inlet 2.33 2.48 5 0
1.02 na 8.7 0.0 8.7 27 1.02 8.7 Recessed Low Point Inlet 2.33 3.74 5 0
I
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I
I10/15/2014
10860002-dra.xls
IExhibit C-2
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EXHIBIT C-3
100 YEAR-INLET COMPUTATIONS
IBarron Crest Subdivision
i d t' C o-i C w > O. ^O
c 0 0 0 - 4.. r+ L b A ��" •Q' O
13
zz o �' a 3 z a
r:1" C E a a s
d O A sa d F ° d a, Coo ,t L
F. DESCRIPTION U .a a a U d
Curb Inlet Grate Inlet
cfs cfs ft ft ft cfs sq-ft sq-ft
1.01 na 8.4 0.0 8.4 27 1.01 8.4 Recessed Low Point Inlet 2.33 3.60 5 0
1.02 na 12.7 0.0 12.7 27 1.02 12.7 Recessed Low Point Inlet 2.33 5.44 5 1.03
1
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I
I10/15/2014
10860002-dra.xls
IExhibit C-2
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Aso
....0 EXHIBIT C-4
10 YEAR PIPE SIZE CALCULATIONS
46
Barron Crest Subdivision
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# # A . :min yr cfs cfs ;# Ids 1% ;" :fps ' min mm
I 1.01 1.02 0.7 10.0 10 5.8 7.7 1 7.7 0.53 18 4.4 31 0.12 10.12
1.02 pond 1.7 10.1 10 14.5 19.2 1 19.2 0.72 24 6.1 142 0.39 10.51
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*Includes 33%Flow Increase for pipe sizes<27"dia. 10/15/2014
10860002-dra.xls
**See Plan&Profile for pipe slope used(Pipe slope>or=Friction slope) Exhibit C-4
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I EXHIBIT C-5
100 YEAR PIPE SIZE CALCULATIONS
Barron Crest Subdivision
I
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# # Ac. min yr cfs cfs i# cfs .% 1" fps !' min min "
I 1.01 1.02 0.7 10.0 100 8.4 11.2 1 11.2 1.13 18 6.3 31 0.08 10.08
1.02 pond 1.7 10.1 100 21.0 27.9 1 27.9 1.51 24 8.9 142 0.27 10.39
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10860002-dra.xls
**See Plan&Profile for pipe slope used(Pipe slope>or=Friction slope) Exhibit C-5
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IEXHIBIT C-6
HYDRAULIC GRADE LINE - 10Yr. Storm
Barron Crest Subdivision
I
` Normal n9 D pMl VeloaV Valoal7 EnVn9 Top Delta 0 _ Min
Inbb I FL FL Beg ._.._.. Pgw)__... j DPM Sbrl
p.m
T Upper Lower WS EIav 010 DA T LergM I S( 1 PpeS Lower WSFJe Upper Hf In Out HI VJS 6Nv� Irtlet-- ch.ac .--Dalt Full Ir1let In
1 1 02 OUT 328.47 32446 H3327675055_,14.48 24_ 142 1_42.421: 14l5% 325.58326.501327.57 1 14+_8.11 8.22 1 00.05;i1_� 3276.5 1 332 1 OK I 4.3485 I 25lk .1_ 1 01
7.01 1.02 327.6d 328.86 5.79 18 31 598I 2516% 32750 1 327.E 326.28 01:14_4_
.18 0.00 6.11 328.79 I 332 OK I 32117 15.5 0
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I10/15/2014
10060002dra xls
IExhibit 06
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' EXHIBIT C-7
HYDRAULIC GRADE LINE - 100Yr. Storm
Barron Crest Subdivision
Normal Normal
Inlets a R Sapp Pipe Depth Starting _ Womb,_velocity_ Ending Top Ending Dena 0 Sheet Slo el ROW Main
From To Upper Lover WS ENv 0100 Die Length 51 Pipe S Lower WS ERN.50 Upper HI In WS Head Inlet WS Elan Check Delta Surface NMI .6S% Capacity Inlet In
1.02 WT 2322:::4"3220113
20./] 328.8 328.50 2085 2a 192 1.89% 252% 325.51 326.50 32].52 2.M 0.81 8.91 000 329.90 332 32810 OK 3.001 0.00 2] 0.80% % 102
1.01 1.02 32T.8a 328.88 32880 8At 111 31 1.28% 282% 32].55 325.90 3211.41 DBD 0.00 8.9< 002 J29.91 332 32881 OK 2.09 0.00 3] 100% 100.]a 0
10/15001a
10860002dra.Rle
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EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Barron Crest Subdivision
rD.A.# D.A.# Pond Routing EVENT= 5 D.A.# D.A.# D.A.#
16 r p a O
c YJ + co 0
R Z C xi o Z
2'i n + + c > a FO I- rn
i,' o O + y C o cc Oa K x O X
2 d U N N O CW a. F- a. W W F- LU
Qp 22.8 2.0 17.5 2.8 _
Tc 10.0 10.0 10.0 __ 10.0
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 2.28 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 2.3 2.3 6.84 1.57 2.28 0.35 324.1 0.2 0.55 1.8 0.3 2.03
2.0 4.6 4.6 11.40 5.95 8.41 1.23 324.3 0.4 1.63 3.5 0.6 4.07
3.0 6.8 6.8 15.96 12.68 17.35 2.34 324.4 0.6 2.93 5.3 0.8 6.10
4.0 9.1 9.1 20.52 21.29 28.64 3.68 324.5' 0.8 4.47 7.0 1.1 8.13
it 5.0 11.4 11.4 25.08 31.95 41.81 4.93 324.6 1.0 5.92 8.8 1.4 10.17
6.0 13.7 13.7 29.64 44.27 57.03 6.38 . 324.7 1.2 7.57 10.5 1.7 12.20
7.0 16.0 16.0 34.20 57.94 73.92 7.99 324.7 1.4 9.38 12.3 2.0 14.23
F 8.0 18.2 18.2 38.76 72.69 92.14 9.72 324.8 1.6 11.32 14.0 2.2 16.27
9.0 20.5 20.5 43.32, 88.33 •111.45 11.56 324.9 1.8 13.35 15.8 2.5 18.30
10.0 22.8 22.8 44.46' 106.59 131.65 12.53 325.0 2.0 14.52 17.5 2.8 20.33
11.0 21.7 21.7 42.18 126.71 151.06 12.18 325.0 1.9 14.06 16.7 2.7 19.32
12.0 20.5 20.5 39.90 145.18 168.89 11.85 325.0 1.8 13.64 15.8 2.5 18.30
13.0 19.4 19.4 37.62 161.96 185.08 11.56 324.9 1.7 13.25 14.9 2.4 17.28
14.0 18.2 18.2 35.34 176.99 199.59 11.30 324.9 1.6 12.89 14.0 2.2 16.27
15.0 17.1 17.1 33.06 190.20 212.33 11.07 324.9, 1.5 12.56 13.2 2.1 15.25
16.0 16.0 16.0 30.78 201.52 223.26 10.87 324.9 1.4 12.26 12.3 2.0 14.23
17.0 14.8 14.8 28.50 210.89 232.30 10.71 324.9 1.3 12.00 11.4 1.8 13.22
18.0 13.7 13.7 26.22 215.61 239.39 11.89 325.0 1.2 13.08, 10.5 1.7 12.20
19.0 12.5 12.5 23.94 217.17 241.84 12.33 325.0 1.1 13.43 9.6 1.5 11.18
20.0 11.4 11.4 21.66 216.70 241.11 12.20 325.0 1.0 13.20 8.8 1.4 10.17
21.0 10.3 10.3 19.38 214.96 238.36 11.70 324.9, 0.9 12.60 7.9 1.3 9.15
22.0 9.1 9.1 17.10 212.40 234.34 10.97 324.9 0.8 11.76 7.0 1.1 8.13
23.0 8.0 8.0 14.82 207.99 229.51 10.76 324.9 0.7 11.45 6.1 1.0 7.12
24.0 6.8 6.8 12.54 201.06 222.81 10.88 324.9 0.6 11.47 5.3 0.8 6.10
25.0 5.7 5.7 10.26 191.51 213.60 11.04 324.9 0.5 11.54 4.4 0.7 5.08
26.0 4.6 4.6 7.98 179.25 201.77 11.26 324.9 0.4 11.66 3.5 0.6 4.07
27.0 3.4 3.4 5.70 164.19 187.23 11.52 324.9 0.3 11.82 2.6 0.4 3.05
28.0 2.3 2.3 3.42 146.22 169.89 11.84 325.0 0.2 12.03 1.8 0.3 2.03
29.0 1.1 1.1 1.14 125.24 149.64 12.20 325.0 0.1 12.30 0.9 0.1 1.02
PEAK FLOWS
I 23 23 13 325.0 2 15 18 3 I 20
I
I
I
1
I
AIMfig1
10860002-dra.xis
111 0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Barron Crest Subdivision
D.A.# JD.A.# Pond Routing EVENT= 10 D.A.# 1 D.A.# D.A.#
it. C
a, W a c W
c
RI co
a+ Z a ° ° JO J ?
C73 + 13 M a.
II a + c c y a.2 F O _ CO
2 a U C N co a a°uw a o0. W x I- W
Qp _ 25.6 2.2 19.7 3.1
Tc 10.0 _ 10.0 1 10.0 10.0
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 2.56 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 2.6 2.6 7.68 1.76 2.56 0.40 324.2 0.2 0.62 2.0 0.3 2.28
2.0 5.1' 5.1 12.80 6.72 9.44 1.36 324.3 0.4 1.80 3.9 0.6 4.56
3.0 7.7 7.7 17.91 14.31 19.52 2.61 324.4 0.7 3.28 5.9 0.9 6.85
4.0 10.2 10.2 23.03 24.19 32.22 4.02 324.5 0.9 4.91 7.9 1.3 9.13
5.0 12.8 12.8 28.15 36.33 47.22 5.45 324.6 1.1 6.56 9.8 1.6 11.41
6.0 15.4 15.4 33.27 50.31 64.49 7.09 324.7 1.3 8.43 11.8 1.9 13.69
7.0 17.9 17.9 38.39 65.76 83.58 8.91 324.8 1.6 10.47 13.8 2.2 15.97
8.0 20.5 20.5 43.51 82.41 104.15 10.87 324.9 1.8 12.65 15.7 2.5 18.26
iii9.0 23.0 23.0 48.63 100.66,. 125.92 12.63 325.0 2.0 14.64 17.7 2.8 20.54
10.0 25.6 25.6 49.91 124.87' 149.28 12.21 325.0 2.2 14.44 19.7 3.1 22.82
11.0 24.3 24.3 47.35 151.28 174.77 11.75 324.9 2.1 13.87 18.7 3.0 21.68
12.0 23.0 23.0 44.79 176.00 198.63 11.32 324.9 2.0 13.32 17.7 2.8 20.54
ill 13.0 21.8 21.8 42.23 198.96 220.78 10.91 324.9 1.9 12.81 16.7 2.7 19.40
14.0 20.5 20.5 39.67 216.75 241.18 12.22 325.0, 1.8 14.00 15.7 2.5 18.26
15.0 19.2 19.2 37.11 226.43 256.42 14.99 325.6' 1.7 16.67 14.8 2.4 17.12
16.0 17.9 17.9 34.55 230.96 263.54 16.29 325.6 1.6 17.86 13.8 2.2 15.97
r 17.0 16.6 16.6 31.99 232.20 265.51 16.65 325.6 1.5 18.10 12.8 2.0 14.83
18.0 15.4 15.4 29.43 231.37 264.19 16.41 325.6 1.3 17.75 11.8 1.9 13.69
y, 19.0 14.1 14.1 26.87 229.22 260.80 15.79 325.6 1.2 17.02 10.8 1.7 12.55
20.0 12.8 12.8 24.31 226.22 256.09 14.93 325.6 1.1 16.05 9.8 1.6 11.41
21.0 11.5 11.5 21.75 222.69 250.53 13.92 325.6 1.0 14.93 8.91 1.4 10.27
1 22.0 10.2 10.2 19.19 218.82 244.45 12.81 325.5 13.70 7.9 1.3 9.13
23.0 9.0 9.0 16.64 214.74 238.02 11.64 324.9 0.8 12.42 6.9 1.1 7.99
24.0 7.7 7.7 14.08 209.93 231.38 10.72 324.9 0.7 11.39 5.9 0.9 6.85
25.0 6.4 6.4 11.52 202.29' 224.01 10.86 324.9 0.6 11.41 4.9 0.8 5.71
26.0 5.1 5.1 8.96 191.73 213.81 11.04 324.9 0.4 11.49 3.9 0.6 4.56
27.0 3.8 3.8 6.40 178.13 200.69 11.28 324.9 0.3 11.61 3.0 0.5 3.42
28.0 2.6 2.6 3.84 161.39 184.53 11.57 324.9 0.2 11.79 2.0 0.3 2.28
29.0 1.3 1.3 1.28 141.39 165.23 11.92 325.0 0.1 12.03 1.0 0.2 1.14
PEAK FLOWS
26 26 17 325.6 2 18 20 3 I 23
1
I
I
I
I
I
10860002-dra.xls
1 0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Barron Crest Subdivision
D.A.# D.A.# Pond Routing EVENT= ' 25 ' I D.A.# D.A.# D.A.#
4t 1
L° Z c
00
n w a N 0
c
p� am -7 J O J Z
2 a c + + c >di a � O N CL Hcn
)., o p + N c 0 d e O x x O X
= 0. U N N a aW 0. I- O W W F W
lib Qp 29.2 2.5 22.5 3.6
Tc 10.0 10.0 1 10.0 10.0 _
inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 2.92 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 2.9 2.9 8.77 2.01 2.92 0.46 324.2 0.3 0.71 2.2 0.4 2.61
2.0 5.8 5.8 14.61 7.73 10.77 1.52 324.3 0.5 2.03 4.5 0.7 5.21
3.0 8.8 8.8 20.46 16.43 22.35 2.96 324.5 0.8 3.72 6.7 1.1 7.82
4.0 11.7 11.7 26.31 27.97 36.89 4.46 324.6 1.0 5.48 9.0 1.4 10.43
5.0 14.6 14.6 32.15 42.04, 54.28 6.12 324.6 1.3 7.39 11.2 1.8 13.03
6.0 17.5 17.5 38.00 58.17 74.20 8.01 324.7 1.5 9.54 13.5 2.1 15.64
7.0 20.5 20.5 43.84 75.95 96.16 10.11 324.9 1.8 11.89 15.7 2.5 18.24
8.0 23.4 23.4 49.69 95.08 119.79 12.36 325.0 2.0 14.40 18.0 2.9 20.85
9.0 26.3 26.3 55.54 120.19 144.77 12.29 325.0 2.3 14.58 20.2 3.2 23.46
10.0 29.2 29.2 57.00 152.26 175.72 11.73 324.9 2.5 14.28 22.5 3.6 26.06
11.0 27.8 27.8 54.07 187.01 209.26 11.12 324.9 2.4 13.54 21.4 3.4 24.76
12.0 26.3 26.3 51.15 216.69, 241.09 12.20 325.0 2.3 14.49 20.2 3.2 23.46
13.0 24.8 24.8 48.23 233.69' 267.84 17.08 325.6 2.2 19.24 19.1 3.0 22.15
14.0 23.4 23.4 45.31 242.63 281.92 19.64 325.7 2.0 21.68 18.0 2.9 20.85
15.0 21.9 21.9 42.38 246.45 287.94 20.74 325.7 1.9 22.65 16.9' 2.7 19.55
16.0 20.5 20.5 39.46 247.03 288.84 20.91 325.7 1.8 22.69 15.7 2.5 18.24
17.0 19.0 19.0 36.54 245.53 286.49 20.48 325.7 1.7 22.13 14.6 2.3 16.94
18.0 17.5 17.5 33.61 242.73 282.07 19.67 325.7 1.5 21.20 13.5 2.1 15.64
19.0 16.1 16.1 30.69 239.09, 276.34 18.63 325.7 1.4 20.03 12.4 2.0 14.34
20.0 14.6 14.6 27.77 234 92' 269.78 17.43 325.6 1.3 18.70 11.2 1.8 13.03
21.0 13.2 13.2 24,85 230.41 262.69 16.14 325.6 1.1 17.28 10.1 1.6 11.73
22.0 11.7 11.7 21.92 225.69 255.26 14.78 325.6 1.0 15.80 9.0 1.4 10.43
23.0 10.2, 10.2 19.00 220.84, 247.62 13.39 325.6 0.9 14.28 7.9 1.3 9.12
c 24.0 8.8 8.8 16.08 215.90 239.84 11.97 325.0 0.8 12.74 6.7 1.1 7.82
25.0 7.3 7.3 13.15 210.55 231.97 10.71 324.9 0.6 11.35 5.6 0.9 6.52
26.0 5.8 5.8 10.23 201.98 223.70 10.86 324.9 0.5 11.37 4.5 0.7 5.21
27.0 4.4' 4.4 7.31 190.07 212.21 11.07 324.9 0.4 11.45 3.4 0.5 3.91
Ilb 28.0 2.9 2.9 4.38 174.70 197.38 11.34 324.9 0.3 11.59 2.2 0.4 2.61
29.0 1.5 1.5 1.46 155.75 179.09 11.67 324.9 0.1 11.80 1.1 0.2 1.30
1 PEAK FLOWS
j 29 29 21 325.7 3 23 22 4 I 26
IIII
1
i
00
ii
ill
. 1
10860002-dra.xls
II 0.00 indicates inital condition Exhibit D-1
AM
I
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Barron Crest Subdivision
D.A.# D.A.# Pond Routing EVENT= 50 D.A.# D.A.# D.A.#
Routing c
a.
O O a
'` Z c 9 c z
Q N m + d + -a m n. CO
Q a ¢ -
a c + c > r 0 N eo
T o O + M c c c > o O o x x O X
I a U .E N N O aw a I- 0. w LU I- LU
Qp 33.0 2.9 25.4 4.0
Tc 10.0 10.0 10.0 10.0 _
AM inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 3.30 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 3.3 3.3 9.91 2.26 3.30 0.52 324.2 0.3 0.81 2.5 0.4 2.95
2.0 6.6 6.6 16.52 8.78 12.18 1.70 324.3 0.6 2.27 5.1 0.8 5.89
3.0 9.9 9.9 23.13 18.66 25.31 3.32 324.5 0.9 4.19 7.6 1.2 8.84
4.0 13.2 13.2 29.74 31.93 41.79 4.93 324.6 1.2 6.08 10.2 1.6 11.79
5.0 16.5 16.5 36.35 48.03 61.67 6.82 324.7 1.4 8.26 12.7 2.0 14.73
6.0 19.8 19.8 42.95 66.40 84.37 8.98 324.8 1.7 10.71 15.2 2.4 17.68
7.0 23.1 23.1 49.56 86.63 109.36 11.36 324.9 2.0 13.38 17.8 2.8 20.62
8.0 26.4 26.4 56.17 111.30 136.19 12.44 325.0 2.3 14.75 20.3 3.2 23.57
9.0 29.7 29.7 62.78 143.72 167.47 11.88 325.0 2.6 14.47 22.9 3.6 26.52
10.0 33.0 33.0 64.43 184.15 206.49 11.17 324.9 2.9 14.05 25.4 4.0 29.46
11.0 31.4 31.4 61.13 221.45 248.58 13.56 325.6 2.7 16.30 24.1 3.8 27.99
12.0 29.7 29.7 57.82 243.05 282.58 19.76 325.7 2.6 22.36 22.9 3.6 26.52
13.0 28.1 28.1 54.52 254.67 300.87 23.10 325.7 2.4 25.55 21.6 3.4 25.04
14.0 26.4 26.4 51.21 259.96 309.19 24.62 325.8 2.3 26.92 20.3 3.2 23.57
15.0 24.8 24.8 47.911 261.22 311.17 24.98 325.8 2.2 27.14 19.1 3.0 22.10
16.0 23.1 23.1 44.61 259.92 309.13 24.60 325.8 2.0 26.62 17.8 2.8 20.62
17.0 21.5 21.5 41.30 256.99 304.52 23.77 325.8 1.9 25.64 16.5 2.6 19.15
18.0 19.8 19.8 38.00 253.04 298.30 22.63 325.7 1.7 24.36 15.2 2.4 17.68
19.0 18.2 18.2 34.69 248.42 291.03 21.31 325.7 1.6 22.89 14.0 2.2 16.20
20.0 16.5 16.5 31.39 243.39 283.12 19.86 325.7 1.4 21.30 12.7 2.0 14.73
21.0 14.9 14.9 28.09 238.10 274.78 18.34 325.6 1.3 19.64 11.4 1.8 13.26
22.0 13.2 13.2 24.78 232.63 266.18 16.77 325.6 1.2 17.93 10.2 1.6 11.79
23.0 11.6 11.6 21.48 227.061 257.42 15.18 325.6 1.0 16.18 8.9 1.4 10.31
24.0 9.9 9.9 18.17 221.43 248.54 13.56 325.6 0.9 14.42 7.6 1.2 8.84
25.0 8.3 8.3 14.87 215.74 239.60 11.93 325.0 0.7 12.65 6.4 1.0 7.37
26.0 6.6 6.6 11.56 209.14 230.61 10.74 324.9 0.6 11.31 5.1 0.8 5.89
27.0 5.0 5.0 8.26 198.87 220.70 10.92 324.9 0.4 11.35 3.8 0.6 4.42
28.0 3.3 3.3 4.96 184.81 207.13 11.16 324.9 0.3 11.45 2.5 0.4 2.95
29.0 1.7 1.7 1.65 166.82 189.77 11.48 324.9 0.1 11.62 1.3 0.2 1.47
PEAK FLOWS
1 33 33 25 325.8 3 27 25 4 1 29
I
I
10860002-dra.xls
0.00 indicates inital condition Exhibit D-1
EXHIBIT"D-1"
PROPOSED DETENTION POND ROUTING
Barron Crest Subdivision
D.A.# D.A.# 'Pond Routing EVENT= 100 D.A.# D.A.# D.A.#
It c
z 1o
c i Z
It
m + di
<a-e +o + h to a O IX 0 5 N N d F-a W W I- IL
Qp 37.1 3.2 28.6 4.5 _
Tc 10.0 10.0 10.0 10.0 _
Inc 1.0
Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs
0.0 0.0 0.0 3.71 0.00 0.00 0.00 324.0 0.0 0.00 0.0 0.0 0.00
1.0 3.7 3.7 11.14 2.54 3.71 0.59 324.2 0.3 0.91 2.9 0.5 3.31
2.0 7.4 7.4 18.56 9.91 13.68 1.88 324.3 0.6 2.53 5.7 0.9 6.62
3.0 11.1 11.1 25.99 21.16 28.48 3.66 324.5 1.0 4.63 8.6 1.4 9.93
4.0 14.9 14.9 33.41 36.27 47.15 5.44 324.6 1.3 6.73 11.4 1.8 13.24
5.0 18.6 18.6 40.84 54.52 69.69 7.59 324.7 1.6 9.20 14.3 2.3 16.55
6.0 22.3 22.3 48.27 75.29 95.36 10.03 324.9 1.9 11.97 17.1 2.7 19.86
7.0 26.0 26.0 55.69 98.21 123.56 12.67 325.0 2.3 14.94 20.0 3.2 23.17
8.0 29.7 29.7 63.12 129.66 153.91 12.12 325.0 2.6 14.71 22.8 3.6 26.49
9.0 33.4 33.4 70.54 169.93 192.77 11.42 324.9 2.9 14.34 25.7 4.1 29.80
10.0 37.1 37.1 72.40' 216.30 240.47 12.09 325.0 3.2 15.32 28.6 4.5 33.11
11.0 35.3 35.3 68.69 246.94' 288.70 20.88 325.7 3.1 23.96 27.1 4.3 31.45
12.0 33.4 33.4 64.97 264.05 315.63 25.79 325.8 2.9 28.70 25.7 4.1 29.80
13.0 31.6 31.6 61.26 272.56 329.02 28.23 325.8 2.8 30.98 24.3 3.9 28.14
14.0 29.7 29.7 57.55 275.60 333.82 29.11 325.9 2.6 31.70 22.8 3.6 26.49
15.0 27.8 27.8 53.84 275.18',. 333.15 28.99 325.9 2.4 31.41 21.4 3.4 24.83
16.0 26.0 26.0 50.12 272.55 329.02 28.23 325.8 2.3 30.50 20.0 3.2 23.17
17.0 24.1 24.1 46.41 268.53 322.68 27.08 325.8 2.1 29.18 18.6 3.0 21.52
18.0 22.3 22.3 42.70 263.61 314.94 25.66 325.8 1.9 27.61 17.1 2.7 19.86
19.0 20.4 20.4 38.98 258.12 306.30 24.09 325.8 1.8 25.87 15.7 2.5 18.21
20.0 18.6 18.6 35.27 252.28 297.11 22.41 325.7 1.6 24.03 14.3' 2.3 16.55
21.0 16.7 16.7 31.56 246.21 287.55 20.67 325.7 1.5 22.13 12.9 2.0 14.90
22.0 14.9 14.9 27.85 240.00 277.77 18.89 325.7 1.3 20.18 11.4 1.8 13.24
23.0 13.0 13.0 24.13 233.69 267.84 17.08 325.6 1.1 18.21'' 10.0 1.6 11.59
24.0 11.1 11.1 20.42 227.32 257.82 15.25 325.6 1.0 16.22 8.6 1.4 9.93
25.0 9.3 9.3 16.71 220.92 247.74 13.41 325.6 0.8 14.22 7.1' 1.1 8.28
26.0 7.4 7.4 12.99 214.49 237.63 11.57 324.9 0.6 12.21 5.7 0.9 6.62
27.0 5.6 5.6 9.28 205.90 227.49 10.79 324.9 0.5 11.28 4.3 0.7 4.97
28.0 3.7 3.7 5.57 193.15 215.18 11.02 324.9 0.3 11.34 2.9 0.5 3.31
29.0 1.9 1.9 1.86 176.09 198.72 11.31 324.9 0.2 11.48 1.4 0.2 1.66
PEAK FLOWS
37 37 29 325.9 3 32 29 5 I 33
MID
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30B �� 3AB Hydraulic Grade Lines
6+00 7+00 LIS
84.010 eI