19991233 Ver 1_Stormwater Info_20001102

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CLUBHOUSE WET DETENTION POND
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FOR
THr PRESERVE. at JORDAN LADE
CHATHAM COUNTY
NOD T1 CA (11,INA
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November, 2000 g j
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LAND US)= E?/ALUATION
C1?/iL E=NGiNE_E=FZlNG
C0N5T2lJCTEON MANAGEMENT
P,O. BOX 2 19 - Pitt5boro, N.C. 273 1 2
Voice [phone] - fax [phone]
4
Table of Contents
• Introduction and Executive Summary
• Water Quality Calculations- Impervious Calculations, Routing, Anti-flotation, EnercJy D1551pator
' I. Clubhouse Pond
Introduction
The 5tormwater Management Plan for the Preserve at Jordan Lake is based upon the following criteria:
t • Impervious Coverage
The anticipated impervious coverage for the entire tract is 19.5%. The County watersupply
' watershed limits impervious coverage to 24% within the critical and protected areas of the Jordan
Lake watershed. The specific breakout of impervious coverage is as follows:
' Item Coverage Impervious Area
5 1 G Homesites 6500 sf max. / lot 3,354,000 sf
I Roads 992,742sf
5idewalks 81 GOO sf
Cart Paths 243,920 sf
Golf Clubhouse and Rec Area 250,000 sf
I Golf Maintenance Facilities 100,000 sf
WWTP and Utility Areas GO,000 sf
Total Impervious 5,082,262 sf
Total Tract Area 2G,044,2G3 sf
• 5tormwater Collection and Treatment in 5ignificant Drainage Basins
t The project location contains I basin. In this location a wet pond has been designed to treat
5tormwater runoff. This structure has been designed to remove 85% T55 according to the most
recent version of the NCDENR 5tormwater Best Practices Manual. The following chart provides a
summary of the required and provided volume of the structure:
Basin Name Location I "5torm Minimum Volume Regd. Minimum Volume Provided
Clubhouse, Intersection of 21 ,943 CF 22, 1 22 CF
The Preserve Trail and Mountain Heather
2
IMPERVIOUS CALCULATION FOR PERMANENT
WATER QUALITY WET CLUBHOUSE POND
Lots 19,500 s.f.
Existing Roads 49,381 s.f.
'
Existing Sidewalks 3,260 s.f.
Clubhouse and Bathhouse 14,515 s.f.
Parking Area and Access 118,830 s.f.
Recreational 24,085 s.f.
Sidewalks and Cartpaths 34,500 s.f.
Total Impervious Area 264,071 s.f.
r Total Area = 12.09 ac.
impervious Area = 6.06 ac.
Impervious Percentage = 50%
The storage volume for the 1" storm (Schueler Method) would be:
Rv =.05+.009 (1)
RV= 0.50
Volume = (Design Rainfall) * (RV)*(Drainage Area)
Volume = 0.50375 ac.ft.
21,943 cf
21,943 c.f. storage required.
22,122 c.f. storage provided.
Approximate Forebay Volume (20%) = 4,389 c.f.
Permanent Pool Depth = 4 ft.
SA / DA ratio = 1.73
Required Surface Area = 0.21 ac.
9,111 sf
Storage Provided
' Incremental Total
Elev. Area (s.f.) Volume (c.f.) Volume (c.f.) Depth (ft.)
' 390 9,215
20,943 20,943
2
392 11,728
1,179 22,122
392.1 11,859 2.1
Drawdown calculation
Orifice required for 2-5 Day Drawdown
2.1 feet of storage so, say 1.05 feet of average head
Using a 2" orifice Q2-day= 17,133
Q = 0.10 cfs Q5-day= 42,833
So, a 2" Orifice will drawdown pond in 2.58 days
The following pages show the stormwater pond routing by the Rooney Malcom
Chainsaw method.
The Preserve at Jordan La ke WP Clubhouse Pond
DESIGN REQUIREMENTS:
A Pond Routing - Store 1" inch of impervious runoff with a permanent pool depth.

Post-Development Runoff -10-yr
Drainage Area, (DA) = 12.09 acres
Overland Flow
Elevation of most remote point, (Hl) = 0.1 feet
Elevation of point of design, (H2) = 0.0 feet
Length of travel, (L) = 0.0 feet
Mult.factor = 2.0
Travel Time (Overland) = 0.0 minutes
Channel Flow
Elevation of most remote point, (HI) = 431.0 feet
Elevation of point of design, (112) = 390.0 feet
Length of travel, (L) = 690.0 feet
Mult. factor = 1.0
Travel Time (Channel) = 3.6 minutes
Pipe Flow
4
Elevation of most remote point, (HI) = 0.0 feet
Elevation of point of design, (H2) = 0.0 feet
Length of travel, (L) = 0.0 feet
Mult. factor = 0.5
Travel Time (Pipe) = minutes
Time of Concentration, (Tc) _> 5.0 minutes
Intensity, (1) = 7.22 inches/hr
Area 1 (Impervious) = 6.06 acres
Area 2 (Pervious) = 6.03 acres
Cl = 0.95
C2 = 0.20
Composite Runoff Coefficient, (C) _> 0.58
Peak Release Rate, (Q10) _> 50 cfs

Post-Development Runoff
Drainage Area, (DA) = 12.09 acres
Time of Concentration, (Tc) _> 5.0 minutes
Intensity, (1) = 8.29 inches/hr
Composite Runoff Coefficient, (C) _> 0.58
Peak Release Rate, (Qu) _> 58 cfs
Drainage Area, (DA) _
Time of Concentration, (Tc) _>
Intensity, (I) _
Composite Runoff Coefficient, (C) _>
Peak Release Rate, (Q100) _>
12.09 acres
5.0 minutes
9.67 inches
0.58
67 cfs
s:113111D002ka1as%wet-roLAe112800 pirted JIMS f)1024AM Pagel or 14
'The ' WPU ubhous e 'on

Stage - Stor age Ftinction
Contour Contour Incr. Accum. Stage
Elev. Area Storage Storage (S) (Z)
(ft) (sf) (cf) (cf) (ft) In (S) In (Z) Z est

390.0 9,216
392.0 11,728 20,944 20,944 2.00 9.95 0.69 2.61
394.0 14,466 26,194 47,138 4.00 10.76 1.39 3.88
395.0 15,919 15,193 62,331 5.00 11.04 1.61 4.45
Check
Stage Storage
2 12,127
4 50,047
6 114,678
Regression Output:
b° 2.05 (X Variable Coed
K 2,939
Stage - Storage Equation is of the form: S = (KsXZ)

Stage - Discharge
Normal Water Surface Elev. = 390.0 feet
Water Surface Elev. (Q10) _ 3,93'.0, feet
Water Surface Elev. (Qu) = feet
Water Surface Elev. (Q100) = feet
Barrel
Dia. of Barrel = 24 inches
Area of Barrel, (Ab) = 3.14 sf
Pipe Length, (L) = 264.0 feet -
Friction Coeff., (Kp) = 0.01058
Inv. of Barrel = 386.00 feet
Riser
Elev. of Riser Crest = 392.10 feet
Circular:
Dia. of Riser = inches
Weir Length= - feet
Area of Riser = - sq. ft.
Water Quality Orifice 2 " 0.0218
1 01311WM2%cak9uA*-.ate1I28oo piriea IIMM 10;24 AM Page 2 of 14
The Preserve Jordan, r Clubhouse Pond
Rectangular.
Length of Riser = 4 feet
Width of Riser = 4 feet
Weir Length = 16 feet
Area of Riser = 16 sq.ft.
Permanent Pool Depth = 4 ft.
'Emergency Spiflway
Width of Spillway (Approx.) = 0 feet
Weir Coefficient = 3.0
Crest Elevation = 0 feet
DFGVT

9:113111DOOZ=ksX**4ot/e1128M plnte2 11MM 10:24 AM Page 3 of 14
'
o4D
Inflow Hyd I
Peak Inflow, (Q10) => 50 e£s
Time to Peak Calculation: CN= 79 P= 3.9 in S= 2.66 in.
Q*= 1.88 in. (depth of runoff
Vol= 82,622 cf (vol. of runo)
Time to Peak, (Tp) => 19.70 minutes
(SCS TR-55)
yqt Q/QP 3 4
(ndn)
0.00 0.000 0 0.00
0,10 0.025 2 1.27
0.20 0.098 4 4.94
0.30 0.212 6 10.66
0.41 0.355 8 17.83
0.51 0.512 10 25.75
0.61 0.668 12 33.60
0.71 0.807 14 40.60
0.81 0.915 16 46.04
0.91 0.982 18 49.37
1.02 0.999 20 50.26
1.12 0.967 22 48.62
1.22 0.887 24 44.60
1.32 0.780 26 39.25
1.42 0.684 28 34.40
1.52 0.599 30 30.14
1.62 0.525 32 26.42
1.73 0.460 34 23.15
1.83 0.403 36 20.29
1.93 0.354 38 17.78
2.03 0.310 40 15.58
2.13 0.272 42 13.65
2.23 0.238 44 11.97
2.34 0.209 46 10.49
2.44 0.183 48 9.19
2.54 0.160 50 8.05
2.64 0.140 52 7.06
234 0.123 54 6.19
2.84 0.108 56 5.42
2.94 0.094 58 4.75
3.05 0.083 60 4.16
3.15 0.073 62 3.65
3.25 0.064 64 3.20
3.35 0.056 66 2.80
3.45 0.049 68 2.46
3.55 0.043 70 2.15
3.65 0.037 72 1.89
3.76 0.033 74 1.65
3.86 0.029 76 1.45
3.96 0.025 78 1.27
4.06 0.022 80 1.11
4.16 0.019 82 0.97
4.26 0.017 84 0.85
4.37 0.015 86 0.75
4.47 0.013 88 0.66
4.57 0.011 90 0.57
4.67 0.010 92 0.50
s:11311=02%cales%wa oLtet128DO printed 1 V2M 1o:24AM Page 4 of 14
' The Jordan C lubhouse X11
4.77 0.009 94 0.44
4.87 0.008 96 0.39
4.97 0.007 98 0.34
5.08 0.006 100 0.30
5.18 0.005 102 0.26
5.28 0.005 104 0.23
5.38 0.004 106 0.20
5.48 0.003 108 0.18
5.58 0.003 110 0.15
5.69 0.003 112 0.13
5.79 0.002 114 0.12
5.89 0.002 116 0.10
5.99 0.002 118 0.09
6.09 0.002 120 0.08
6.19 0.001 122 0.07
6.29 0.001 124 0.06
6.40 0.001 126 0.05
6.50 0.001 128 0.05
6.60 0.001 130 0.04
6.70 0.001 132 0.04
6.80 0.001 134 0.03 g
6.90 0.001 136 0.03
7.01 0.000 138 0.02
7.11 0.000 140 0.02
7.21 0.000 142 0.02
7.31 0.000 144 0.02
7.41 0.000 146 0.01
7.51 0.000 148 0.01
7.61 0.000 150 0.01
7.72 0.000 152 0.01
7.82 0.000 154 0.01
7.92 0.000 156 0.01
8.02 0.000 158 0.01
8.12 0.000 160 0.01
8.22 0.000 162 0.00
8.32 0.000 164 0.00
8.43 0.000 166 0.00
8.53 0.000 168 0.00
8.63 0.000 170 0.00
8.73 0.000 172 0.00
8.83 0.000 174 0.00
8.93 0.000 176 0.00
I %Al31awoo2caIcsrwet-rodeI12800 ptded MAW 10.14 AM Page 5 of 14
TheTre serve at J ordan La ke NNT C lubhouse Pond
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Storm Rou ting Table 10-vr
WEIR ORIFICE W.Q. EMERGENCY TOTAL
TIME INFLOW STORAGE STAGE RISER RISER BARREL ORIFICE SPILLWAY OUTFLOW
(min) cfs cf ift-1 (cfs) (cfs) (Cfs) (Cfs) (efs) cfs
0.00 0.00 0 0.00 0.0 0.0 0.0 0.0 0.0 0.0
2.00 1.27 0 0.00 0.0 0.0 0.0 0.0 0.0 0.0
4.00 4.94 152 0.24 0.0 0.0 0.6 0.4 0.0 0.4
6.00 10.66 696 0.49 0.0 0.0 1.9 0.6 0.0 0.6
8.00 17.83 1904 0.81 0.0 0.0 3.9 0.8 0.0 0.8
10.00 25.75 3953 1.16 0.0 0.0 6.7 0.9 0.0 0.9
12.00 33.60 6934 1.52 0.0 0.0 10.1 1.0 0.0 1.0
' 14.00 40.60 10841 1.89 0.0 0.0 14.0 1.2 0.0 1.2
16.00 46.04 15573 2.26 3.4 247.4 34.7 1.3 0.0 4.7
18.00 49.37 20540 2.59 18.0 431.8 35.8 1.4 0.0 19.3
20.00 50.26 24143 2.80 31.0 517.5 36.4 1.4 0.0 32.4
22.00 48.62 26289 2.92 39.2 559.7 36.8 1.4 0.0 38.2
24.00 44.60 27534 2.99 44.1 582.1 37.0 1.5 0.0 38.5
26.00 39.25 28270 3.03 47.0 594.7 37.1 1.5 0.0 38.6
28.00 34.40 28348 3.03 47.3 596.0 37.1 1.5 0.0 38.6
30.00 30.14 27842 3.00 45.3 587.4 37.1 1.5 0.0 38.5
32.00 26.42 26837 2.95 41.3 569.7 36.9 1.4 0.0 38.3
34.00 23.15 25406 2.87 35.8 543.0 36.7 1.4 0.0 37.2
36.00 20.29 23720 2.78 29.4 508.5 36.4 1.4 0.0 30.8
38.00 17.78 22461 2.70 24.7 480.2 36.1 1.4 0.0 26.1
40.00 15.58 21458 2.64 21.2 455.9 35.9 1.4 0.0 22.5
42.00 13.65 20623 2.59 18.3 434.0 35.8 1.4 0.0 19.6
44.00 11.97 19906 2.55 15.9 414.0 35.6 1.3 0.0 17.2
46.00 10.49 19278 2.51 13.8 395.3 35.5 1.3 0.0 15.1
48.00 9.19 18720 2.47 12.0 377.6 35.4 1.3 0.0 13.4
50.00 8.05 18220 2.44 10.5 360.8 35.3 1.3 0.0 11.8
52.00 7.06 17770 2.41 9.1 344.7 35.2 1.3 0.0 10.5
54.00 6.19 17362 2.38 8.0 329.2 35.1 1.3 0.0 9.3
56.00 5.42 16991 2.36 6.9 314.4 35.0 1.3 0.0 8.2
58.00 4.75 16653 2.34 6.0 300.0 34.9 13 0.0 73
60.00 4.16 16345 2.31 5.2 286.2 34.9 1.3 0.0 6.5
62.00 3.65 16062 2.29 4.5 272.7 34.8 1.3 0.0 5.8
64.00 3.20 15803 2.28 3.9 259.7 34.7 1.3 0.0 5.2
66.00 2.80 15564 2.26 3.4 246.9 34.7 13 0.0 4.6
68.00 2.46 15345 2.24 2.9 234.5 34.6 1.3 0.0 4.1
70.00 2.15 15142 2.23 2.5 222.4 34.6 1.3 0.0 3.7
72.00 1.89 14954 2.22 2.1 210.4 34.5 1.3 0.0 3.3
74.00 1.65 14781 2.20 1.7 198.6 34.5 1.3 0.0 3.0
76.00 1.45 14619 2.19 1.5 186.8 34.5 1.2 0.0 2.7
78.00 1.27 14468 2.18 1.2 175.1 34.4 1.2 0.0 2.4
80.00 1.11 14327 2.17 1.0 163.4 34.4 1.2 0.0 2.2
82.00 0.97 14194 2.16 0.8 151.4 34.4 1.2 0.0 2.0
84.00 0.85 14070 2.15 0.6 139.2 34.3 1.2 0.0 1.8
86.00 0.75 13951 2.14 0.5 126.5 34.3 1.2 0.0 1.7
88.00 0.66 13839 2.13 0.3 113.0 34.3 1.2 0.0 1.6
90.00 0.57 13731 2.13 0.2 98.2 34.2 1.2 0.0 1.4
92.00 0.50 13627 2.12 0.1 81.5 34.2 1.2 0.0 1.3
94.00 0.44 13526 2.11 0.1 60.8 34.2 1.2 0.0 1.3
96.00 0.39 13426 2.10 0.0 27.8 34.2 1.2 0.0 1.2
98.00 0.34 13325 2.09 0.0 0.0 34.1 1.2 0.0 1.2
100.00 0.30 13220 2.09 0.0 0.0 34.1 1.2 0.0 1.2
102.00 0.26 13109 2.08 0.0 0.0 34.1 1.2 0.0 1.2
104.00 0.23 12995 2.07 0.0 0.0 34.1 1.2 0.0 1.2
106.00 0.20 12877 2.06 0.0 0.0 34.0 1.2 0.0 1.2
108.00 0.18 12755 2.05 0.0 0.0 34.0 1.2 0.0 1.2
110.00 0.15 12632 2.04 0.0 0.0 34.0 1.2 0.0 1.2
112.00 0.13 12506 2.03 0.0 0.0 33.9 1.2 0.0 11
114.00 0.12 12378 2.02 0.0 0.0 33.9 1.2 0.0 1.2
116.00 0.10 12248 2.01 0.0 0.0 33.9 1.2 0.0 1.2
118.00 0.09 12117 2.00 0.0 0.0 15.1 1.2 0.0 1.2
120.00 0.08 11985 1.99 0.0 0.0 15.0 1.2 0.0 1.2
' s:%l' ,oswxkoute92a 11852 1.98 p irta9.Qrv= io:24 aM 0.0 14.9 1.2 0.0 Page 6 of 14.2
i
The Pre serve Jordan ' tit 't
124.00 0.06 11718 1.97 0.0 0.0 14.8 1.2 0.0 1.2
126.00 0.05 11583 1.96 0.0 0.0 14.6 1.2 0.0 1.2
128.00 0.05 11448 1.94 0.0 0.0 14.5 1.2 0.0 1.2
130.00 0.04 11313 1.93 0.0 0.0 14.4 1.2 0.0 1.2
132.00 0.04 11177 1.92 0.0 0.0 14.3 1.2 0.0 1.2
134.00 0.03 11041 1.91 0.0 0.0 14.1 1.2 0.0 1.2
136.00 0.03 10905 1.90 0.0 0.0 14.0 1.2 0.0 1.2
138.00 0.02 10769 1.89 0.0 0.0 13.9 1.2 0.0 1.2
140.00 0.02 10633 1.88 0.0 0.0 13.8 1.2 0.0 1.2
0:1131110002%calm%wetrafe1128M
paked 11/2MID:24AM
Page 7 of 14
The, Preserve at Jordan Lak e W C lu 'in
142.00 0.02 10497 1.86 0.0 0.0 13.6 1.2 0.0 1.2
144.00 0.02 10361 1.85 0.0 0.0 13.5 1.1 0.0 1.1
146.00 0.01 10225 1.84 0.0 0.0 13.4 1.1 0.0 1.1
148.00 0.01 10090 1.83 0.0 0.0 13.2 1.1 0.0 1.1
150.00 0.01 9955 1.82 0.0 0.0 13.1 1.1 0.0 1.1
152.00 0.01 9820 1.80 0.0 0.0 13.0 1.1 0.0 1.1
154.00 0.01 9685 1.79 0.0 0.0 12.8 1.1 0.0 1.1
156.00 0.01 9551 1.78 0.0 0.0 12.7 1.1 0.0 1.1
158.00 0.01 9416 1.77 0.0 0.0 12.6 1.1 0.0 1.1
160.00 0.01 9283 1.75 0.0 0.0 12.5 1.1 0.0 1.1
162.00 0.00 9149 1.74 0.0 0.0 12.3 1.1 0.0 1.1
164.00 0.00 9017 1.73 0.0 0.0 12.2 1.1 0.0 1.1
166.00 0.00 8884 1.72 0.0 0.0 12.1 1.1 0.0 1.1
168.00 0.00 8752 1.71 0.0 0.0 11.9 1.1 0.0 1.1
170.00 0.00 8620 1.69 0.0 0.0 11.8 1.1 0.0 1.1
172.00 0.00 8489 1.68 0.0 0.0 11.7 1.1 0.0 1.1
174.00 0.00 8358 1.67 0.0 0.0 11.5 1.1 0.0 1.1
176.00 0.00 8228 1.65 0.0 0.0 11.4 1.1 0.0 1.1

Inflow 1g
,yr
Peak Inflow, (Q5D) = 58 cfs
Time to Peak Calculation: CN= 79 P= 4.62 in S= 2.66 in.
Q*= 2.48 in. (depth of runoft)
Vol= 108,729 cf (vol. of runoff
Time to Peak, (Tp) => 22.60 minutes
(SCS TR-55)
OR QQE t Q
fmin)
0.00 0.000 0.00 0.00
0.13 0.043 3.00 2.47
0.27 0.164 6.00 9.47
0.40 0.343 9.00 19.78
0.53 0.549 12.00 31.66
0.66 0.746 15.00 43.04
0.80 0.901 18.00 52.00
0.93 0.988 21.00 56.99
1.06 0.991 24.00 57.15
1.19 0.909 27.00 52.46
1.33 0.773 30.00 44.57
1.46 0.650 33.00 37.51
1.59 0.547 36.00 31.56
1.73 0.460 39.00 26.56
1.86 0.387 42.00 22.35
1.99 0.326 45.00 18.81
2.12 0.274 48.00 15.83
2.26 0.231 51.00 13.32
2.39 0.194 54.00 11.21
2.52 0.163 57.00 9.43
2.66 0.138 60.00 7.93
2.79 0.116 63.00 6.68
2.92 0.097 66.00 5.62
3.05 0.082 69.00 4.73
3.19 0.069 72.00 3.98
3.32 0.058 75.00 3.35
3.45 0.049 78.00 2.82
3.58 0.041 81.00 2.37
3.72 0.035 84.00 1.99
3.85 0.029 87.00 1.68
3.98 0.024 90.00 1.41
4.12 0.021 93.00 1.19
4.25 0.017 96.00 1.00
e:11311=02%caW*V .t, "1128W Wk"d 11r2QW 1o:u AM Page 8 of 14
The Preserve ?at Jordan La ke WP C lubhouseTond
4.38 0.015 99.00 0.84
4.51 0.012 102.00 0.71
4.65 0.010 105.00 0.60
4.78 0.009 108.00 0.50
4.91 0.007 111.00 0.42
5.04 0.006 114.00 0.36
5.18 0.005 117.00 0.30
5.31 0.004 120.00 0.25
5.44 0.004 123.00 0.21
5.58 0.003 126.00 0.18
5.71 0.003 129.00 0.15
5.84 0.002 132.00 0.13
5.97 0.002 135.00 0.11
6.11 0.002 138.00 0.09
.6.24 0.001 141.00 0.08
6.37 0.001 144.00 0.06
6.51 0.001 147.00 0.05
6.64 0.001 150.00 0.04
6.77 0.001 153.00 0.04
6.90 0.001 156.00 0.03
7.04 0.000 159.00 0.03
7.17 0.000 162.00 0.02 s
7.30 0.000 165.00 0.02
7.43 0.000 168.00 0.02
7.57 0.000 171.00 0.01
7.70 0.000 174.00 0.01
7.83 0.000 177.00 0.01
7.97 0.000 180.00 0.01
8.10 0.000 183.00 0.01
8.23 0.000 186.00 0.01
8.36 0.000 189.00 0.00
8.50 0.000 192.00 0.00
8.63 0.000 195.00 0.00
8.76 0.000 198.00 0.00
8.89 0.000 201.00 0.00
9.03 0.000 204.00 0.00
9.16 0.000 207.00 0.00
9.29 0.000 210.00 0.00
9.43 0.000 213.00 0.00
9.56 0.000 216.00 0.00
9.69 0.000 219.00 0.00
9.82 0.000 222.00 0.00
9.96 0.000 225.00 0.00
10.09 0.000 228.00 0.00
10.22 0.000 231.00 0.00
10.36 0.000 234.00 0.00
10.49 0.000 237.00 0.00
10.62 0.000 240.00 0.00
WEIR ORIFICE
TIME INFLOW STORAGE STAGE RISER RISER
(min) (cfs) (cf)
0.00 0.00 0 0.00 0.0 0.0
3.00 2.47 0 0.00 0.0 0.0
6.00 9.47 445 0.40 0.0 0.0
9.00 19.78 2054 0.84 0.0 0.0
12.00 31.66 5476 1.36 0.0 0.0
15.00 43.04 10997 1.91 0.0 0.0
18.00 52.00 18536 2.46 11.5 371.5
21.00 56.99 25596 2.88 36.5 546.6
24.00 57.15 29026 3.06 50.0 607.2
27.00 52.46 32341 3.23 63.5 657.5
30.00 44.57 34714 3.34 73.3 689.8
::??s3i waksaee,o? iaS3 35601 3.39 pime7r7A-mm+o24Am 701.2
W.Q. EMERGENCY TOTAL
BARREL ORIFICE SPILLWAY OUTFLOW

0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0
1.3 0.5 0.0 0.5
4.1 0.8 0.0 0.8
8.5 1.0 0.0 1.0
14.1 1.2 0.0 1.2
35.3 1.3 0.0 12.8
36.7 1.4 0.0 37.9
37.3 1.5 0.0 38.7
37.8 1.5 0.0 39.3
38.1 1.5 0.0 39.6
38.2 1.6 0.0 Pepe 9 of X9.8
00
36 31.56 35193 3.37 75.3 696.0 38.2 1.5 0.0 39.7
.
39
00 26.56 33725 3.30 69.2 676.6 38.0 1.5 0.0 39.5
.
00
42 22.35 31397 3.18 59.6 643.8 37.6 1.5 0.0 39.1
.
45
00 18.81 28377 3.03 47.4 596.5 37.1 1.5 0.0 38.6
.
00
48 15.83 24812 2.84 33.5 531.2 36.6 1.4 0.0 34.9
.
00
51 13.32 21376 2.64 20.9 453.8 35.9 1.4 0.0 22.2
.
00
54 11.21 19768 2.54 15.4 410.0 35.6 1.3 0.0 16.7
.
57
00 9.43 18772 2.48 12.2 379.3 35.4 1.3 0.0 13.5
.
00
60 7.93 18036 2.43 9.9 354.3 35.2 1.3 0.0 11.3
.
63
00 6.68 17439 2.39 8.2 332.2 35.1 1.3 0.0 9.5
.
66
00 5.62 16932 2.35 6.8 311.9 35.0 1.3 0.0 8.1
.
69
00 4.73 16490 2.32 5.6 292.8 34.9 1.3 0.0 6.9
.
00
72 3.98 16100 2.30 4.6 274.6 34.8 1.3 0.0 5.9
.
75
00 3.35 15754 2.27 3.8 257.1 34.7 1.3 0.0 5.1
.
00
78 2.82 15444 2.25 3.1 240.2 34.7 1.3 0.0 4.4
.
00
81 2.37 15166 2.23 2.5 223.8 34.6 1.3 0.0 3.8
.
00
84 1.99 14915 2.21 2.0 207.8 34.5 1.3 0.0 3.3
.
00
87 1.68 14688 2.20 1.6 191.9 34.5 1.2 0.0 2.8
.
90
00 1.41 14481 2.18 1.2 176.1 34.4 1.2 0.0 2.5
.
00
93 1.19 14291 2.17 0.9 160.2 34.4 1.2 0.0 2.2
.
96.00 1.00 14116 2.15 0.7 143.9 34.3 1.2 0.0 1.9
99
00 0.84 13954 2.14 0.5 126.7 34.3 1.2 0.0 .41 1.7
.
102.00 0.71 13801 2.13 0.3 108.0 34.3 1.2 0.0 1.5
00
105 0.60 13657 2.12 0.1 86.5 34.2 1.2 0.0 1.4
.
108.00 0.50 13517 2.11 0.0 58.5 34.2 1.2 0.0 1.3
111.00 0.42 13379 2.10 0.0 0.0 34.2 1.2 0.0 1.2
114.00 0.36 13235 2.09 0.0 0.0 34.1 1.2 0.0 1.2
117.00 0.30 13080 2.08 0.0 0.0 34.1 1.2 0.0 1.2
120.00 0.25 12915 2.06 0.0 0.0 34.0 1.2 0.0 1.2
123
00 0.21 12742 2.05 0.0 0.0 34.0 12 0.0 1.2
.
126.00 0.18 12563 2.03 0.0 0.0 33.9 1.2 0.0 1.2
129.00 0.15 12379 2.02 0.0 0.0 33.9 1.2 0.0 1.2
132.00 0.13 12190 2.01 0.0 0.0 33.8 1.2 0.0 1.2
135.00 0.11 11998 1.99 0.0 0.0 15.0 1.2 0.0 1.2
138.00 0.09 11803 1.97 0.0 0.0 14.9 1.2 0.0 1.2
141.00 0.08 11606 1.96 0.0 0.0 14.7 1.2 0.0 1.2
144.00 0.06 11407 1.94 0.0 0.0 14.5 1.2 0.0 1.2
147.00 0.05 11207 1.92 0.0 0.0 14.3 1.2 0.0 1.2
150.00 0.04 11006 1.91 0.0 0.0 14.1 1.2 0.0 1.2
153.00 0.04 10804 1.89 0.0 0.0 13.9 1.2 0.0 1.2
156.00 0.03 10603 1.87 0.0 0.0 13.7 1.2 0.0 1.2
159.00 0.03 10401 1.86 0.0 0.0 13.5 1.1 0.0 1.1
162.00 0.02 10199 1.84 0.0 0.0 13.3 1.1 0.0 1.1
165.00 0.02 9997 1.82 0.0 0.0 13.1 1.1 0.0 1.1
168.00 0.02 9796 1.80 0.0 0.0 13.0 1.1 0.0 1.1
171.00 0.01 9595 1.78 0.0 0.0 12.8 1.1 0.0 1.1
174.00 0.01 9395 1.77 0.0 0.0 12.6 1.1 0.0 1.1
177.00 0.01 9195 1.75 0.0 0.0 12.4 1.1 0.0 1.1
180.00 0.01 8996 1.73 0.0 OA 12.2 1.1 0.0 1.1
183.00 0.01 8798 1.71 0.0 0.0 12.0 1.1 0.0 1.1
186.00 0.01 8601 1.69 0.0 0.0 11.8 1.1 0.0 1.1
189.00 0.00 8405 1.67 0.0 0.0 11.6 1.1 0.0 1.1
192.00 0.00 8210 1.65 0.0 0.0 11.4 1.1 0.0 1.1
195.00 0.00 8015 1.63 0.0 0.0 11.2 1.1 0.0 1.1
198.00 0.00 7822 1.61 0.0 0.0 11.0 1.1 0.0 1.1
201.00 0.00 7630 1.59 0.0 0.0 10.8 1.1 0.0 1.1
204.00 0.00 7438 1.57 0.0 0.0 10.6 1.1 0.0 1.1
207.00 0.00 7248 1.55 0.0 0.0 10.4 1.1 0.0 1.1
210.00 0.00 7059 1.54 0.0 0.0 10.2 1.0 0.0 1.0
213.00 0.00 6872 1.51 0.0 0.0 10.0 1.0 0.0 1.0
216.00 0.00 6685 1.49 0.0 0.0 9.8 1.0 0.0 1.0
219.00 0.00 6500 1.47 0.0 0.0 9.6 1.0 0.0 1.0
222.00 0.00 6316 1.45 0.0 0.0 9.4 1.0 0.0 1.0
225.00 0.00 6133 1.43 0.0 0.0 9.2 1.0 0.0 1.0
228.00 0.00 5951 1.41 0.0 0.0 9.0 1.0 0.0 1.0
231.00 0.00 5771 139 0.0 0.0 8.8 1.0 0.0 1.0
s:v l ?sr.e?.oue?299 5592 1.37 WWeP•Qtrmroo toz4AM 0.0 8.6 1.0 0.0 Pe9e 10 arA'0
00 0.00
237 5415 1.35 0.0 0.0 8.4 1.0 0.0 1.0
.
240.00 0.00 5239 1.33 0.0 0.0 8.2 1.0 0.0 1.0

inflow o , a t I
Peak Inflow, (Qloo) = 67 cfs
Time to Peak Calculation: CN= 79 P= 5.75 in S= 2.66 in.
Q*= 3.46 in. (depth of runoJff)
Vol= 151,727 cf (vol. of runofl)
Time to Peak, UP) => 27.03 minutes
(SCS TR-55)
OR -Q QR t -Q
(?) cfs
0.00 0.000 0.00 0.00
0.13 0.030 3.00 2.03
0.27 0.117 6.00 7.86 .4;
0.40 0.250 9.00 16.80
0.53 0.412 12.00 27.76
0.66 0.586 15.00 39.44
0.80 0.749 18.00 50.42
0.93 0.882 21.00 59.38
1.06 0.969 24.00 65.25
1.19 1.000 27.00 67.31
1.33 0.970 30.00 65.32
1.46 0.884 33.00 59.52
1.59 0.768 36.00 51.71
1.73 0.665 39.00 44.76
1.86 0.576 42.00 38.75
1.99 0.498 45.00 33.54
2.12 0.431 48.00 29.03
2.26 0.373 51.00 25.13
2.39 0.323 54.00 21.76
2.52 0.280 57.00 18.83
2.66 0.242 60.00 16.30
2.79 0.210 63.00 14.11
2.92 0.181 66.00 12.22
3.05 0.157 69.00 10.57
3.19 0.136 72.00 9.15
3.32 0.118 75.00 7.92
3.45 0.102 78.00 6.86
3.58 0.088 81.00 5.94
3.72 0.076 84.00 5.14
3.85 0.066 87.00 4.45
3.98 0.057 90.00 3.85
4.12 0.050 93.00 3.33
4.25 0.043 96.00 2.89
4.38 0.037 99.00 2.50
4.51 0.032 102.00 2.16
4.65 0.028 105.00 1.87
4.78 0.024 108.00 1.62
4.91 0.021 111.00 1.40
5.04 0.018 114.00 1.21
5.18 0.016 117.00 1.05
5.31 0.014 120.00 0.91
5.44 0.012 123.00 0.79
5.58 0.010 126.00 0.68
5.71 0.009 129.00 0.59
5.84 0.008 132.00 0.51
5.97 0.007 135.00 0.44
6.11 0.006 138.00 0.38
6.24 0.005 141.00 0.33
cA1311W D2%=IO w+*4We112BW priNed IIMOM 1024 AM Page 11 of 14
' The Preserve at La
Jordan C
ke WP P1
lubhouse
6.37 0.004 144.00 0.29
6.51 0.004 147.00 0.25
6.64 0.003 150.00 0.21
6.77 0.003 153.00 0.19
6.90 0.002 156.00 0.16
' 7.04 0.002 159.00 0.14
7.17 0.002 162.00 0.12
7.30 0.002 165.00 0.10
7.43 0.001 168.00 0.09
7.57 0.001 171.00 0.08
7.70 0.001 174.00 0.07
7.83 0.001 177.00 0.06
7.97 0.001 180.00 0.05
8.10 0.001 183.00 0.04
8.23 0.001 186.00 0.04
8.36 0.000 189.00 0.03
8.50 0.000 192.00 0.03
8.63 0.000 195.00 0.02
8.76 0.000 198.00 0.02
8.89 0.000 201.00 0.02
9.03 0.000 204.00 0.02
9.16 0.000 207.00 0.01
9.29 0.000 210.00 0.01
9.43 0.000 213.00 0.01
9.56 0.000 216.00 0.01
9.69 0.000 219.00 0.01
9.82 0.000 222.00 0.01
9.96 0.000 225.00 0.01
10.09 0.000 228.00 0.01
10.22 0.000 231.00 0.00
10.36 0.000 234.00 0.00
10.49 0.000 237.00 0.00
'
10.62 0.000 240.00 0.00
10.75 0.000 243.00 0.00
10.89 0.000 246.00 0.00
11.02 0.000 249.00 0.00
11.15 0.000 252.00 0.00
s:11311 W )OZ%calcsWAA-routel12800 piMed: 1'I129=10:24 AM Page 12 of 14
' ;The Pres erve at J ordan La ke WP C lubhouse Pond.
' , Rou tin2 Table 100-vr
WEIR
ORIFICE
W.Q.
EMERGENCY
TOTAL
TIME INFLOW STORAGE STAGE RISER RISER BARREL ORIFICE SPILLWAY OUTFLOW
(min) cfs cwt ift-1 (Cfs) (Cfs) (Cfs) (cfs) cfs cfs
0
00 0.00 0 0.00 0.0 0.0 0.0 0.0 0.0 0.0
.
00
3 2.03 0 0.00 0.0 0.0 0.0 0.0 0.0 0.0
.
6
00 7.86 365 0.36 0.0 0.0 1.2 0.5 0.0 0.5
.
00
9 16.80 1688 0.76 0.0 0.0 3.6 0.7 0.0 0.7
'
.
00
12 27.76 4578 1.24 0.0 0.0 7.4 0.9 0.0 0.9
.
00
15 39.44 9406 1.77 0.0 0.0 12.6 1.1 0.0 1.1
.
18
00 50.42 16304 2.31 5.1 284.2 34.9 1.3 0.0 6.4
.
00
21 59.38 24224 2.81 31.3 519.2 36.4 1.4 0.0 32.7
.
24
00 65.25 29030 3.06 50.0 607.3 37.3 1.5 0.0 38.7
.
27
00 67.31 33803 3.30 69.5 677.7 38.0 1.5 0.0 39.5
.
30.00 65.32 38808 3.53 90.5 739.9 38.7 1.6 0.0 40.2
33.00 59.52 43322 3.73 109.6 788.7 39.2 1.6 0.0 40.9
36.00 51.71 46681 3.87 123.9 821.6 39.6 1.7 0.0 41.3
00
39 44.76 48555 3.94 131.9 838.9 39.9 1.7 0.0 41.5
.
00
42 38.75 49138 3.96 134.4 844.1 39.9 1.7 0.0 41.6
.
' 45
00 33.54 48625 3.94 132.2 839.5 39.9 1.7 0.0 41.5
.
48.00 29.03 47186 3.89 126.1 826.3 39.7 1.7 0.0 t
41.4
51
00 25.13 44968 3.80 116.6 805.2 39.4 1.6 0.0 41.1
.
54.00 21.76 42098 3.68 104.4 776.0 39.1 1.6 0.0 40.7
57.00 18.83 38689 3.53 90.0 738.5 38.6 1.6 0.0 40.2
60
00 16.30 34837 3.35 73.8 691.4 38.1 1.5 0.0 39.7
.
63.00 14.11 30632 3.15 56.5 632.4 37.5 1.5 0.0 39.0
66.00 12.22 26153 2.91 38.7 557.2 36.8 1.4 0.0 38.2
00
69 10.57 21473 2.64 21.2 456.2 35.9 1.4 0.0 22.6
.
72.00 9.15 19310 2.51 13.9 396.3 35.5 1.3 0.0 15.2
75.00 7.92 18215 2.44 10.5 360.6 35.3 1.3 0.0 11.8
78.00 6.86 17519 2.39 8.4 335.3 35.1 1.3 0.0 9.7
'
81.00 5.94 17003 2.36 7.0 314.8 35.0 1.3 0.0 8.3
84.00 5.14 16583 2.33 5.9 296.9 34.9 1.3 0.0 7.1
87.00 4.45 16224 2.31 4.9 280.5 34.8 1.3 0.0 6.2
90.00 3.85 15906 2.28 4.2 265.0 34.8 1.3 0.0 5.4
93.00 3.33 15622 2.26 3.5 250.1 34.7 1.3 0.0 4.8
96.00 2.89 15365 2.25 2.9 235.7 34.6 1.3 0.0 4.2
99.00 2.50 15130 2.23 2.4 221.6 34.6 1.3 0.0 3.7
102.00 2.16 14916 2.21 2.0 207.8- 34.5 1.3 0.0 3.3
'
105.00 1.87 14718 2.20 1.6 194.1 34.5 1.2 0.0 2.9
108.00 1.62 14536 2.19 1.3 180.5 34.4 1.2 0.0 2.6
111.00 1.40 14367 2.17 1.0 166.8 34.4 1.2 0.0 2.3
114.00 1.21 14209 2.16 0.8 152.8 34.4 1.2 0.0 2.0
I
117.00 1.05 14061 2.15 0.6 138.3 34.3 1.2 0.0 1.8
120.00 0.91 13921 2.14 0.4 123.0 34.3 1.2 0.0 1.6
123.00 0.79 13788 2.13 0.3 106.3 34.3 1.2 0.0 1.5
126.00 0.68 13660 2.12 0.1 87.1 34.2 1.2 0.0 1.4
129.00 0.59 13536 2.11 0.1 63.0 34.2 1.2 0.0 1.3
132.00 0.51 13411 2.10 0.0 18.3 34.2 1.2 0.0 1.2
135.00 0.44 13283 2.09 0.0 0.0 34.1 1.2 0.0 1.2
138.00 0.38 13143 2.08 0.0 0.0 34.1 1.2 0.0 1.2
141.00 0.33 12993 2.07 0.0 0.0 34.1 1.2 0.0 1.2
144.00 0.29 12835 2.06 0.0 0.0 34.0 1.2 0.0 1.2
147.00 0.25 12669 2.04 0.0 0.0 34.0 1.2 0.0 1.2
150.00 0.21 12497 2.03 0.0 0.0 33.9 1.2 0.0 1.2
153.00 0.19 12319 2.02 0.0 0.0 33.9 1.2 0.0 1.2
156.00 0.16 12137 2.00 0.0 0.0 33.8 1.2 0.0 1.2
159.00 0.14 11951 1.99 0.0 0.0 15.0 1.2 0.0 1.2
162.00 0.12 11763 1.97 0.0 0.0 14.8 1.2 0.0 1.2
165.00 0.10 11571 1.95 0.0 0.0 14.6 1.2 0.0 1.2
168.00 0.09 11378 1.94 0.0 0.0 14.5 1.2 0.0 1.2
171.00 0.08 11183 1.92 0.0 0.0 14.3 1.2 0.0 1.2
174.00 0.07 10987 1.91 0.0 0.0 14.1 1.2 0.0 1.2
177.00 0.06 10790 1.89 0.0 0.0 13.9 1.2 0.0 1.2
180.00 0.05 10592 1.87 0.0 0.0 13.7 1.2 0.0 .1.2
10393 1.85 w+rte8.@wsw io:z4Am 0.0 13.5 1.1 0.0 Page 13 of 1t.1
00
186 0.04 10194 1.84 0.0 0.0 13.3 1.1 0.0 1.1
.
00
189 0.03 9996 1.82 0.0 0.0 13.1 1.1 0.0 1.1
.
00
192 0.03 9797 1.80 0.0 0.0 13.0 1.1 0.0 1.1
.
00
195 0.02 9598 1.78 0.0 0.0 12.8 1.1 0.0 1.1
.
00
198 0.02 9400 1.77 0.0 0.0 12.6 1.1 0.0 1.1
.
00
201 0.02 9202 1.75 0.0 0.0 12.4 1.1 0.0 1.1
.
00
204 0.02 9005 1.73 0.0 0.0 12.2 1.1 0.0 1.1
.
207
00 0.01 8808 1.71 0.0 0.0 12.0 1.1 0.0 1.1
.
210
00 0.01 8612 1.69 0.0 0.0 11.8 1.1 0.0 1.1
.
00
213 0.01 8417 1.67 0.0 0.0 11.6 1.1 0.0 1.1
.
216
00 0.01 8223 1.65 0.0 0.0 11.4 1.1 0.0 1.1
.
219
00 0.01 8029 1.63 0.0 0.0 11.2 1.1 0.0 1.1
.
222
00 0.01 7837 1.62 0.0 0.0 11.0 1.1 0.0 1.1
.
00
225 0.01 7645 1.60 0.0 0.0 10.8 1.1 0.0 1.1
.
00
228 0.01 7454 1.58 0.0 0.0 10.6 1.1 0.0 1.1
.
231.00 0.00 7265 1.56 0.0 0.0 10.4 1.1 0.0 1.1
234.00 0.00 7076 1.54 0.0 0.0 10.2 1.0 0.0 1.0
00
237 0.00 6889 1.52 0.0 0.0 10.0 1.0 0.0 1.0
.
240.00 0.00 6702 1.50 0.0 0.0 9.8 1.0 0.0 1.0
00
243 0.00 6517 1.48 0.0 0.0 9.6 0.0 0.0
.
246.00 0.00 6518 1.48 0.0 0.0 9.6 0.0 0.0
249.00 0.00 6518 1.48 0.0 0.0 9.6 0.0 s 0.0
252.00 0.00 6519 1.48 0.0 0.0 9.6 0.0 0.0
s:\1311 VXWWakslwd4ot*e1128DO pi teed IWOM01o:24 AM Page 14 of 14
1

I

ANTI-FLOTATION DESIGN FOR CLUB HOUSE WET POND

FLOTATION OF RISER

RISER DIMENSIONS
Inside Dimensions Width = 4.0 feet
Length = 4.0 feet

ELEV. @ TOP OF RISER =
ELEV. @ BOT. OF RISER =
H = 392.10
386.00
6.10 ft
AREA OF RISER = 16.0 SF
VOLUME OF RISER = 97.6 Cubic Feet

DIAMETER OF BARREL = 24 Inch
AREA OF BARREL = 3.1 SF
EXPOSED LENGTH = 6.00 ft
VOLUME OF BARREL = 18.8 Cubic Feet

WEIGHT OF WATER DISPLACED = 7266.45 lb
FACTOR OF SAFETY (10%) 7993.10 lb

VOLUME OF CONCRETE ANCHOR = 91.2 Cubic Feet

WEIGHT OF OUTLET STR UCTURE
Inside Dimension 4'X4'
Outside Dimension 51X5'
Volume of Concrete 54.9 Cubic Feet
Weight of Concrete 9250 lb

ANIT-FLOTATION WEIGH T REQUIRED = -1257 lb
ANIT-FLOTATION VOLUME REQUIRED = -14.3 Cubic Feet

ANTI-FLOTATION PAD REQUIRED
DEPTH = N/A
WIDTH = N/A
LENGTH= N/A

VOLUME PROVIDED = NIA

SO, NO CONCRETE PAD REQUIRED

1

ENERGY DISSIPATOR
flow Q in cfs : 58 Flow depth (ft) = 2.25
slope S in ft/ft :.0176 Outlet velocity (fps) = 12.481
' pipe diameter D in ft : 2.5
Manning number n: .013
' For a pipe diameter of 2.50 feet and
an outlet velocity of 12.48 feet per second:
The recommended apron length is 20.00 feet.
' The maximum stone diameter is 22.3 inches.
' DIAM STONE THICKNESS
AVG
(inches)
' (inches) CLASS
_
» 13 B 22

I !r

Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project. X
1. PROJECT INFORMATION (please complete e following information):
Project Name : T{? FreWrite- T Gzu.
Contact Person: au.-J [.?wa ??Q S Phone Number: (ql 9
For projects with multiple basins, specify which basin this worksheet applies to:
Basin Bottom Elevation L- 212 •D ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 2$5- !? ft. (elevation of the orifice invert out)
Temporary Pool Elevation ft. (elevation of t e utlet structure invert in)
00 10 e, I 9
Permanent Pool Surface Area (o&t 412 s .(?tk (water surface area at permanent pool elevation)
Drainage Area L- 5 q ac. (on-site and off-site drainage to the basin)
Impervious Area L- ac. (on-site and off-site drainage to the basin)
Permanent Pool Volume 4 ? N, S145 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume '__"1-5, 144 cu. ft. (volume detained on top of the permanent pool)
z9, q cu. ft.
Forebay Volume r /?,'fl r-
F,.
SA/DA used 2 Z (surface area to drainage area ratio)
Diameter of Orifice ?L in. (draw down orifice diameter) e
II. REQUIRED ITEMS CHECKLIST r®
The following checklist outlines design requirements per the Stormwater Best Management Practices m"'al
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative de
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of
why.
F cMAa off.
The temporary pool controls runoff from the 1 inch storm event.
The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided.
Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). 13•
The temporary pool draws down in 2 to 5 days. 2-107 PAY=e,
The forebay volume is approximately equal to 20% of the total basin volume. C -
Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
A minimum 30-foot vegetative filter is provided at the outlet.
A site specific operation and maintenance (O&M) plan is provided.
A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the 0&M plan.
A debris check is specified in the 0&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
A responsible party is designated in the 0&M plan.
09/97 Page 1 of 1
S
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:

lu
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: D,j Po,.A ; 3
Drainage Area: 14 - 9 $ acres Percent Impervious Area: 31-4
II. REQUIRED ITEMS CHECKLIST r?J ®?
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H.1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
Applicants Initials
Cl(lL?? ""'' ?u?'
r NO
1'
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
11f
,A- The basin length to width ratio is greater than 3:1.
D The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
Sediment storage (20% of detention volume) in addition to detention volume is provided.
-Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
WAccess for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release
- erosion on banks
t tZ ?i V:17la A 1- i%1?
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
I. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:
eve- 0'+
La ke
Phone Number,,
For projects with multiple basins, specify which basin this worksheet applies to: De. 6,1A * 2--
Drainage Area: 3 . q4 acres Percent Impervious Area: 21-67
II. REQUIRED ITEMS CHECKLIST ®G'?
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H.1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
/ ' (2al,?_ j it
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
Aoulicants Initials
The basin length to width ratio is greater than 3:1. f?a
The basin side slopes are no steeper than 3:1.
fa)C1s.T. nks ?4er?o?sion?on baI '& I S ll=1t?z / j 'I 0.-7)

A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
.Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
.Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
,Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release
I? tkt/r?
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:
Phone Number: (4 (9 ) 5415 - $ $ 11
For projects with multi le basins, specify which basin this worksheet applies to: Or v POV"C( "4?
Drainage Area: &A acres Percent Impervious Area: 25
II. REQUIRED ITEMS CHECKLIST p b K? `?`
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
Applicants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
KIM The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release
1r i it ? - erosion on banker
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
I. PROJECT INFORMATION (please complete the following information):
Project Name : 1 Pre. Sea v{ 4 ?Or
Contact Person: autal IE we,,J S
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: Dr, pa'.a( ',- G
Drainage Area. (o • 5 I acres Percent Impervious Area: 24-5 %
J I
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
Api)licants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 55 days.
The basin length to width ratio is greater than 3:1.'S-S? 1?
Lt The basin side slopes are no steeper than 3:1. Go ''
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
Vegetation plan prepared by a licensed professional is specified.
HOTBasin to be stabilized within 14 days of construction is specified.
d Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
AAMD Access for clean-out and maintenance is provided.
!'7 Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release 1
- erosion on banks ?' yL9l???J
II. REQUIRED ITEMS CHECKLIST ? ? D ? I?? ? ? ? Z o
Project No. DW
(to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : :[6 Pre se roe c4 Jord m" L& 6c
Contact Person: CxVi d ?? wG?,,ccQ 5 Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: De I Pov?ck -a (v "
Drainage Area: • 01 acres Percent Impervious Area: 1 14.3 %
II. REQUIRED ITEMS CHECKLIST 3 77?c7 ?}
A ? 11
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H.1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of whv.
Applicants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
DVJf10V' TV
The basin length to width ratio is greater than 3:1. g.?' t?- X
s
The basin side slopes are no steeper than 3:1.,?isr-•
A small permanent pool at outlet orifice is provided to reduce clogging.
d An emergency drain to completely empty the basin is provided.
Vegetation plan prepared by a licensed professional is specified.
IWO>
Basin to be stabilized within 14 days of construction is specified.
Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
/JL Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
avP
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release y?
b
as
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:
For projects with multiple basins, specify which basin this worksheet applies to: 91, w Pe4 "7
Drainage Area: 1 b • 3 acres Percent Impervious Area: $ • 9 %
II. REQUIRED ITEMS CHECKLIST pu? dt4f -a 01<
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
ADolicants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period ?off22.to,5 days.
The basin length to width ratio is greater than 3:1. ?? ??Itf
The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
.Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
.Sediment storage (20% of detention volume) in addition to detention volume is provided.
.Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
.Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release .??
erosion on bank L A , 11Gt.&-' Mr-'P ?? 1p

Project No. DW
(to be provided by DWQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project. '
1. PROJECT INFORMATION (please complete the following information):
Project Name : h C" Gr
Contact Person: Loae-cl _S Phone Number: (cl 1 - 11
For projects with multiple basins, specify which basin this worksheet applies to: Wes' Ov
Basin Bottom Elevation 2% •0 ft. (average elev ion of the floor of the basin)
Permanent Pool Elevation 302.0 ft. (elev e o vert out)
Temporary Pool Elevation 30• $ ft. (e ation of the out `et struc re invert in)
???.1 ? p fir,,, R1t1 y ?. `f'?-?
Permanent Pool Surface Area sq. ft. 6 (w ter surface area at perman t pool elevation)
Drainage Area ac. (on- ' e and off-site dr ' e to the basin)
Impervious Area (?J • 7Z ac. ) (1,77(on-site an o -site drainage to the basin)
Permanent Pool Volume 0 7?0 2 cu. ft. (combined volume of main basin and forebay)
? 2
>T
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of
why. ?--
j0i° .
Forebay Volume c7` Q ? cu. ft. ???j, 7
TemporarII. y Pool REQUIRED Volume ITEMS CHECKLIST cu. ft (volume detained on top of the permanent pool)
SA/DA used (surface area to drainag
Diameter of Orifice in. (draw down orifice e area ratio)
? fice diameter)
!1
The temporary pool controls runoff from the 1 inc storm event.
The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than o
Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). Ce.'
The temporary pool draws down in Z to 5 days. ?. 33 bA?YS
The forebay volume is approximately equal to 20% of the total basin volume.
A minimum 30-foot vegetative filter is provided at the outlet.
A site specific operation and maintenance (O&M) plan is provided.
A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the O&M plan.
A debris check is specified in the 0&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
A responsible party is designated in the O&M plan.
FORM SW 100 09/97 Page 1 of 1
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
I. PROJECT INFORMATION (please complete the following information):
Project Name : -T6 PreselrtAe a4 3ordlcu. Lo. 12
Contact Person: a v:e( ea uumJ6 Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: Dr t Poll J # 1
Drainage Area: 11 • 3 3 acres Percent Impervious Area: 2G • $
II. REQUIRED ITEMS CHECKLIST // 7 74, co The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H.1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of whv. fix,
Applicants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
The basin length to width ratio is greater than 3:1. 14 ev?r' s `rb *?I-,-
The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
.Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
.Sediment storage (20% of detention volume) in addition to detention volume is provided.
,Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
-Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet cloaaina or too ra id a release
ion on ba j s
p
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
I. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:
For projects with multiple basins, specify which basin this worksheet applies to: Dr., Po AA -*'lo
Drainage Area: 4-TS acres Percent Impervious Area: 1 l Z %
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H.1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
Applicants Initials /Vo 06f 4/a/
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
The basin length to width ratio is greater than 3:1. L7>"ft 'W _t
110 '?V?
_' WO The basin side slopes are no steeper than-3: 1. 15 GC> ftT1b s
14 A small permanent pool at outlet orifice is provided to reduce clogging.
WOO An emergency drain to completely empty the basin is provided.
Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
- outlet clogging or too rapid a release
- eros y b inks
1? ?p
Project No. DW
(to be provided by DWQ)
DIVISION OF WATER QUALITY - 401 BASIN WORKSHEET
DWO Stormwater Management Plan Review: ??, ,,j ??}?.'
A complete stormwater management plan submittal includes a wet cletention asin worksheet for each basin.
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review, and approval of the project. x
1. PROJECT INFORMATION (please com lete the following information):
Project Name : he r +
Contact Person: Day,- C u, )c?.e-JS Phone Number: (4? 19 ) !5 4
For projects with multiple basins, specify which basin this worksheet applies to: Ex+• Der. Wei "d _474 I I
Basin Bottom Elevation 403.0 ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 40(f.0 ft. (elevation of the orifice invert out)
Temporary Pool Elevation 401 • 0 ft. 1,e
44a of the outlet structure invert in) Permanent Pool Surface Area 210 s . ft. ?(water surface area at permanent pool elevation)
Drainage Area 15 1 a' ac.-, 12, kn-site n-site and off-site drainage to the basin)
Impervious Area 9 .,713 ac. and off-site drainage to the basin)
Permanent Pool Volume 2$ % cu. ft. combined volume of main basin and forebay)
Temporary Pool Volume ?J (07 cu. ft.r/ (volume detained on top of the permanent pool)
ForebaY Volume D cu. ft.
SA/DA used w 3? v (surface area to drainage area ratio)
Diameter of Orifice in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of
why.- (/''j7i1 ? r-"" "
The temporary pool controls runoff from the 1 inch storm eve t.
The basin length to width ratio is greater than 3:1.
.khe basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided.
Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin. ti
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
The temporary pool draws down in 2 to 5 days. ,
The forebay volume is approximately equal to of the total basin volume.
Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
A minimum 30-foot vegetative filter is provided at the outlet.
A site specific operation and maintenance (O&M) plan is provided.
A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the 0&M plan.
A debris check is specified in the 0&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
A responsible party is designated in the O&M plan.
09/97 Page 1 of 1
Project No. DW
(to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
I. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:
For projects with multiple basins, specify which basin this worksheet applies to: pr no?? l2"
Drainage Area: 12.35 acres Percent Impervious Area: 19 S %
II. REQUIRED ITEMS CHECKLIST
l 07 0- k
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why. •b
Ai)hcants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
q3 04sT
The basin length to width ratio is greater than 3:1. ???b J
he basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
tl t 1 Cr cr, too ra id a release
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o
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IV %444 14'??osi r??ntban G•? L??LL ,
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : t ne Pce-t-wroc a JdrkL,,, La ?e
Contact Person: av:A Cd wa.r 5 Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: DC4 po,n,dQ ('s
Drainage Area: '3 11 acres Percent Impervious Area: 10 . 4 %
II. REQUIRED ITEMS CHECKLIST
b k
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why. D
Applicants Initials
v
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
An emergency drain to completely empty the basin is provided.
.Vegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
.Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
.Additional treatment to meet the 85% TSS removal efficiency is provided.
Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
spect for proper operation at least twice annually including:
- outlet clogging or too rapid a release
lwto-mff'r T-.5

- In
Project No. DW
(to be provided by DWQ)
DIVISION OF WATER QUALITY
401 EXTENDED DRY DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a dry detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name 6re,5crv,c JDrcQa•µ 6.e-
Contact Person: ?a d '?. c?xl.rd 5 Phone Number: TV-11
For projects with multiple basins, specify which basin this worksheet applies to: Or,
Drainage Area: 22. 13 acres Percent Impervious Area: 11 '? %
II. REQUIRED ITEMS CHECKLIST J 2 ?? t' tr' 61-'(
The following checklist outlines design requirements per the Stormwater Best Management Practices
Manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following
design requirements have been met and supporting documentation is attached. If a requirement has not
been met, attach an explanation of why.
Aimiicants Initials
Either capture runoff from 1 yr., 24 hour storm and release over a 48 hour period, or
capture runoff from 1 inch storm and draw down over a period of 2 to 5 days.
1 /J The basin length to width ratio is greater than 1.
The basin side slopes are no steeper than 3:1.
A small permanent pool at outlet orifice is provided to reduce clogging.
1 Y.2 An emergency drain to completely empty the basin is provided.
FEVegetation plan prepared by a licensed professional is specified.
Basin to be stabilized within 14 days of construction is specified.
)_o Sediment storage (20% of detention volume) in addition to detention volume is provided.
Inlet and outlet erosion control measures to prevent scour are provided.
Additional treatment to meet the 85% TSS removal efficiency is provided.
lavo Access for clean-out and maintenance is provided.
Inlet plunge pool or other energy dissipation is provided.
Forebay is provided to capture sediment and minimize clean-out problems.
Uncompacted natural soils are utilized to promote vegetation and reduce sedimentation.
Seasonal high water table is at least 1 foot below bottom of basin.
If used as a temporary basin, plans indicate clean-out prior to final operation.
A site specific operation and maintenance plan with the following provisions is provided.
- Mow grass at least twice annually
- Remove trash and debris upon accumulation and at least twice annually
- Inspect for proper operation at least twice annually including:
l I aa' o t 'd 1
-out et c
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i
OPERATIONAND MAINTENANCE MANUAL
FOR
PERMANENT WET DETENTION POND 91
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf •. _ ?M
P.O. Box 490
Pittsboro, N. C. 27312 lip
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
D. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. The forebay depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original forebay design depth
C. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
IV. Annually (once a year):
A. The pond depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original depth Permanent pool depth is 13.5' measured
vertically from the normal pool to the pond's bottom and the temporary pool depth to store
the 1" storm is 3.5' measured vertically from the emergency spillway to the normal pool.
Sediment must be removed to at least the original design depth.
V. General:
A Mowing of the side slopes will be accomplished according to the season. Maximum grass
height will be 6 inches.
B. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than/2 the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used Contact your nearest Agricultural Extension Agent.
C. The 6" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
D. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
I
OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #2
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
1. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairstcleaning will be done as necessary.
H. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a year):
A Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 5.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %i the surface area of the pond The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
B. The 3/4" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #3
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N. C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
III. Semi-annually (twice a year):
A Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the i" storm is 4.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %i the surface area of the pond The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in lulling cattails
can also be used Contact your nearest Agricultural Extension Agent.
B. The 1 11T' orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good worlung order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #4
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N. C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
1. Monthly, or after every runoff producing rainfall event, whichever comes first:
A Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. RepauVcleamng will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed.
r B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the I" storm is 5.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
D. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than Y2 the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used Contact your nearest Agricultural Extension Agent.
E. The 1" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
F. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #S
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N.C. 27312
Contact: David Edwards, General Manager (919-545-8811)
1. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
in. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 4.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %z the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used Contact your nearest Agricultural Extension Agent.
B. The 1" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #6
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N. C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N.C. 27312
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
H. Quarterly (Four times a year):
A Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required.
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 4.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %2 the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used Contact your nearest Agricultural Extension Agent.
B. The 3/4" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
R
OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #7
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N.C. 27312
Contact: David Edwards, General Manager (919-545-8811)
1. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear. outlet orifice; remove accumulated debris, repair/replace if it is not
functioning
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a year):
A Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 3.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %2 the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
B. The 1" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERA TIONAND MAINTENANCE MANUAL
FOR
PERMANENT WET DETENTION POND #8
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N.C. 27312
Contact: David Edwards, General Manager (919-545-8811)
VI. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
D. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairstcleaning will be done as necessary.
VII. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
VIII. Senn-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. The forebay depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original forebay design depth.
C. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
IX. Annually (once a year):
A. The pond depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original depth Permanent pool depth is 8.8' measured
vertically from the normal pool to the pond's bottom and the temporary pool depth to store
the 1" storm is 2.8' measured vertically from the emergency spillway to the normal pool.
Sediment must be removed to at least the original design depth.
X. General:
A. Mowing of the side slopes will be accomplished according to the season. Maximum grass
height will be 6 inches.
B. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %z the surface area of the pond The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
C. The 3" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
D. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
A r
OPERATIONAND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #9
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.Q. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
1. Monthly, or after every runoff producing rainfall event, whichever comes first:
A Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairstcleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
M. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 4.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %i the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used Contact your nearest Agricultural Extension Agent.
B. The P orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.

OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #10
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N. C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
H. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 3.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %Z the surface area of the pond The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
B. The 3/4" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERATION AND MAINTENANCE MANUAL
FOR
EXTENDED DETENTION WETLAND POND #I1
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
M. Monthly, or after every runoff producing rainfall event, whichever comes first:
E. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning.
F. Inspect and clear the orifice of any obstructions.
G. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
H. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
XII. Quarterly (Four times a year):
C. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
D. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
MIL Semi-annually (twice a year):
D. Accumulated sediment from the bottom of the outlet structure will be removed
E. The forebay depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original forebay design depth.
F. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
XIV. Annually (once a year):
B. The pond depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original depth. Permanent pool depth varies from 0-18"
measured vertically from the normal pool to the pond's bottom and the temporary pool depth
to store the 1" storm is 2.0' measured vertically from the top of riser to the normal pool.
Sediment must be removed to at least the original design depth.
XV. General:
E. Mowing of the side slopes will be accomplished according to the season. Maximum grass
height will be 6 inches.
F. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %z the surface area of the pond The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used Contact your nearest Agricultural Extension Agent.
G. The 3" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
H. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.
OPERA TIONAND MAINTENANCE MANUAL
FOR
PERMANENT DRYDETENTIONPOND #12
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N.C. 27312
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 4.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %Z the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
B. The 1" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.

OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #13
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N.C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N. C. 27312
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleamng will be done as necessary.
H. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired
III. Semi-annually (twice a year):
A Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A The pond will be checked at various points. Sediment removal is required when the orifice is
restricted Temporary pool depth to store the 1" storm is 4.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than % the surface area of the pond The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
B. The 1/2" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced.

OPERATION AND MAINTENANCE MANUAL
FOR
PERMANENT DRY DETENTION POND #14
THE PRESERVE AT JORDAN LAKE
BIG WOODS ROAD
CHATHAM COUNTY, N. C.
October 25, 2000
Pond Owner: Bluegreen Golf
P.O. Box 490
Pittsboro, N.C. 27312
Contact: David Edwards, General Manager (919-545-8811)
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A Inspect and clear outlet orifice; remove accumulated debris, repair/replace if it is not
functioning.
B. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
C. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (ie. Catch basins, piping, grassed swales) for proper functioning.
Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be
checked for obstructions and cleared as required
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
in. Semi-annually (twice a year):
A Accumulated sediment from the bottom of the outlet structure will be removed
B. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary.
C. Mow grass twice annually.
IV. Annually (once a year):
A. The pond will be checked at various points. Sediment removal is required when the orifice is
restricted. Temporary pool depth to store the 1" storm is 5.0' measured vertically from the
emergency spillway to the ponds bottom. Sediment must be removed to at least the original
design depth.
V. General:
A. Cattails are encouraged along the pond perimeter, however they will be removed when they
cover more than %Z the surface area of the pond. The best time to cut them is at the end of the
growing season, in November. Environmentally sensitive chemicals for use in killing cattails
can also be used. Contact your nearest Agricultural Extension Agent.
B. The 1" orifice is designed to draw down the pond in two to five days. If draw down is not
accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow
draw down may be attributed to a clog system. The source of clogging will be found and
eliminated
C. All components of the wet detention pond system will be kept in good working order. Repair
or replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component must be redesigned and/or replaced
Group, me
.
LAND USE EVALUATION
CIVIL ENGINEi=FUNG
CONSTRUCTION MANAGEMENT
TO: NCDENR, Division of Water Quality
1621 Mail Service Center
Raleigh, N.C. 27604
ATTENTION j ftd St. John ?
WT
Transmittal
DATE: 11/29/00
PROJECT NO: 500_01
RE: Harris Tract/ The Preserve
DWQ# 991233
Quantity Drawing No. Description
mmmmww?
3 Sets Stormwater Management Plan
3 Sets Clubhouse Wet Detention Pond Calculations
3 Sets Operation and Maintenance Manual
3 Sets Worksheet / Checklist
r
REMARKS Todd, please find all of the attached the documents.
Call if you have anv questions or require additional information during your review.
cc
Steve Levitas
David Edwards
CE Group, inc.
_j/
Signed
ark P.Ashness
P.O. Box 219 - Pittsboro, N.C. 27312 - voice [phone] - fax [phone]
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project. x
I. PROJECT INFORMATION (please complete the following information):
Project Name : Tlne ? 5eryC a.+ Jordo,• Lak
Contact Person: Do.%J'A E d wog-rok, Phone Number: f 011_ 54-r) -32 It
For projects with multiple basins, specify which basin this worksheet applies to: G Iubh o?tSe o,no(
Basin Bottom Elevation S36 •0 ft.
Permanent Pool Elevation 3 90 - o ft.
Temporary Pool Elevation 3a2 • I ft.
(average elevation of the floor of the basin)
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
Permanent Pool Surface Area 9. it t sq. ft. (water surface area at permanent pool elevation)
Drainage Area 12 •0'1 ac. (on-site and off-site drainage to the basin)
Impervious Area 600 ac. (on-site and off-site drainage to the basin)
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
SA/DA used
Diameter of Orifice
l -11 (0 0 9 cu. ft.
all 94S cu. ft.
4. 389 cu. ft.
I•II
(combined volume of main basin and forebay)
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)
in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of
why.
The temporary pool controls runoff from the 1 inch storm event.
The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided.
Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). 4 1
The temporary pool draws down M2 to 5 days. 2.58 DG. y S
The forebay volume is approximately equal to 20% of the total basin volume.
Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
A minimum 30-foot vegetative filter is provided at the outlet.
A site specific operation and maintenance (O&M) plan is provided.
A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the 0&M plan.
A debris check is specified in the 0&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
A responsible party is designated in the O&M plan.
09/97 Page 1 of 1
23?
Project No. DWQ
Project Name: (??pG7
SUBMITTED DESIGN: REQUIRED DESIGN:
elevations status
Bottom of Basin (ft) 386
Permanent Pool (ft) 390 4 ft. depth ok
Temporary Pool (ft) 392.1 2.1 ft. depth ok

areas
Permanent Pool SA (sq ft) 9215 9130 sq. ft. ok
Drainage Area (ac) 12.09
Impervious Area (ac) 6.06 50.1 % -

volumes
Permanent Pool (cu ft) 17609
Temporary Pool (cu ft) 22122 21992 cu. ft. ok
Forebay (cu ft) 4389 24.9 % check forebt
other parameters
SA/DA 0 1.73 -
Orifice Diameter (in) 2 0.11 cfs drawdown -
Design Rainfall (in) 1 2.4 day drawdown ok
Linear Interpolation of Correct SAIDA***
% Im ervious
Next Lowest 50
Project Impervious 50.1
Next Highest 60
4 ft. Permanent Pool Depth
SA/DA from Table
1.73
1.73
2.03
C6 Group, inc
LAND USE EVALUATION
CIVIL ENGINEERING
CONSTRUCTION MANAGEMENT
Transmittal
TO: NCDENR, Division of Water Quality
1621 Mail Service Center
Raleigh, N.C. 27604
ATTENTION: Todd St. John
DATE: 11/01/00
PROJECT NO: 500_01
RE: Harris Tract/The Preserve
DWQ# 991233
Quantity Drawing No. Description
3 set Stormwater Management Plan
1 Set Drainage Area Map
3 Set Stormwater Management Plan Calculations
3 Set Operation and Maintenance Manual for each structure
3 Set Worksheet / Checklist

F.
2

REMARKS Todd, please find all of the attached the documents.
Call if you have any questions or require additional information during your review.
CC:
Steve Levitas
David Edwards
tl)e? CE Group, inc.
Signed
Mark P.Ashness
P.O. Box 219 - Pittsboro, N.C. 27312 - voice [phone] - fax [phone]