19961012 Ver 1_COMPLETE FILE_19961025

State of North Carolina
Department of Environment, LT0?9A'
Health and Natural Resources / • e
Division of Water Quality a
James B. Hunt, Jr., Governor
Wayne McDevitt Secretary p E H N F1
A. Preston Howard, Jr., P.E., Director
December 9, 1997
Mr. Jim Merrifield
The Crosland Group
125 Scaleybark Road
Charlotte, NC 28209
Dear Mr. Merrifield:
Re: Storrnwater plan approval
University East Business Park
Mecklenburg County
DWQ # 961012
On October 24, 1997, we received a revised stormwater plan for this project from your
consultant, Mr. Kevin Caldwell of W.K. Dickson Inc. This plan is adequate to meet the
additional condition of our certification which was issued on November 26, 1996. All other
conditions of that certification are still applicable.
Please call me or Ray Cox at 919-733-1786 if you have any questions.
cc: Mooresville DWQ Regional Office
Kevin Caldwell, W.K. Dickson
Len Rindner
Central Files
Asheville Field Office, US Army COE
Division of Water Quality • Non-Discharge Branch
4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone] FAX # [phone]
An Equal Opportunity Aff irmative Action Employer • 50% recycled/10% post consumer paper
WK
DICKSON
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
MEMORANDUM
Date: December 2, 1997
To: John Dorney
From: J. Ray Cox, EIT
Environmental Engince
on. SO
FM,?RoN?c',? 1y9)
'?l9?sC?N ,.
?s
October 24, 1997
f X? '
ID EHNR
Subject: Approved Stormwater Management Plan
University East Business Park
DWQ #961012
Mecklenburg County
Comments: The submitted Stormwater Management Plan contains the adjustments we
requested in our meeting with Kevin Caldwell, P.E., Project Engineer, on
September 5, 1997. The berms are of earthen design, and the outlet
structures arc now rip-rap weirs (to avoid clogging). The berms are located
far enough away from the active channel, and at a low enough elevation, that
interference with base and flood flows is improbable.
Mr. Caldwell has shown that each detention area will provide adequate
storage for one inch of rainfall over the accompanying drainage area. The
outlet weirs will release that volume of water over a period of at least 48
hours. Although we have very little experience with these created stormwater
wetlands, this design appears adequate to meet our stormwater management
requirements.
I am now working with Len Rindner to "tweak" the Operation and
Maintenance Agreement. Len forwarded the agreement to us just before I left
for Colorado, so the delay is my responsibility. Accordingly, I would
recommend we release the project for construction while we finalize the
O&M. Coordination of schedules has been a problem, but I'm confident that
Len and I can have things finalized by the end of the month.
961012S WA
Environmental Sciences Branch 4401 Reedy Creek Road Raleigh, North Carolina 27607
Telephone [phone] FAX # [phone]
An Equal Opportunity Aftmetive Action Employer 50% recycled/10% post consumer paper
WK
DICKSON
Oak
Mr. John R. Dorney
Engineers Department of Water Quality
Pla"nm 4401 Reedy Creek Road
Surveyors
Raleigh, North Carolina 27607
Re: University East Business Park
Dear Mr. Dorney:
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Cs
October 24, 1997

Please find attached the revised stormwater basins for your review. The concept
was discussed during our meeting on September 5, 1997. The plan
contemplates providing wet detention along Back Creek using a berm and a
stone/rip-rap spillway system. The calculations support this concept.
If you have any questions, please call.
Sincerely,
W. . DICKSON & CO., INC.
Vin S. Caldwell, PE
Senior Vice President
KSC: kwa
cc: Mike Joyner
(0
Attachment

1924 Cleveland Avenue Other O(/ices: Atlanta. GA
Charlotte, North Carolina 28203 Asheville. NC
704 334-5348 Hickory, NC
Fax [phone] Raleigh, NC
www.wkdickson com Columbia, SC
rk W.K.
r DICKSON
1924 Cleveland Avenue
Charlotte, NC 28203 76
[phone] 0 FAX:[phone]
TO:
ATTENTION:
LETTER OF TRANSMITTAL
DATE:
RE: I \r.
We are sending you
VIA: Overnight Regular Mail E Pick-up 0 Hand Delivered
Courier-Mercury Courier - US Delivery Courier - Courier - A&E
Messengers Sharpe
The following Prints Plans Specifications Diskette
items:
Sepia Mylar Other VELLUM
COPIES DATE NO. DESCRIPTION
Z "
THESE ARE TRAN ITTED as checked below:
0 For Approval IK For Review and Comment F7As Requested
Remarks:
0 For Your Use
COPY TO: file SIGNED:
11
R TRES1 W iN W O1MCLITRANS.DOC
Sate of North Uarolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
ED E--= F=1
August 20, 1997
Mr. Len Rindner
7113 Hickory Nut Drive
Raleigh, NC 27613
Dear Mr. Rindner:
RE: University Business Park - Stormwater management plan
DWQ # 961012
COE # 199702072
Mecklenburg County
Thank you for your letter of 27 July 1997 which described the stormwater
management plan for this development. The concept of renovating and then
utilizing the floodplain of Back Creek is acceptable to DWQ to satisfy the
conditions of our 401 Certification. However we have the following concerns with
the conceptual design which will have to be addressed before we can give
written approval for this stormwater management plan. These concerns are
listed below:
Zl` 1. Dike construction - Please provide details as to the heigth of the dike,
? V 2
3
?o UST ? ??,0

WOO' 5.
too
U? a -ssh>>1 OjIA
its construction and maintenance plans.
Outfall structures - The planned pipe will likely clog in this wooded
environment. We believe that a concrete weir would be more durable
and less subject to maintenance concerns.
Operation and maintenance plan - An O & M plan will be needed for
this stormwater management plan which will have to be signed by the
developer.
Size - It is not clear whether the two treatment areas are of sufficient
size to adequately handle the stormwater flows. Please provide
calculations as to the areas to be drained into these treatment areas,
the surface areas of the treatment areas, and calculations depicting the
length of the retention time.
Monitoring - A plan to monitor the vegetation and soils will be needed
to indicate whether this system is functioning as intended. DWQ is
interested in working with you to design the plan and share in the
monitoring as part of a plan to develop design guidelines for the use of
natural wetlands for stormwater management.
Environmental Sciences Branch • 4401 Reedy Creek Road • Raleigh. North Carolina 27607
Telephone [phone] FAX # [phone]
An Equal opportunity Atftrn rtW Action Employer 50°,. recycled/10°. post consumer paper
c

D WK
Engineers DICKSON
Planners
Surveyors
COMPUTED BY: P.D.W. DATE
CHECKED BY. K.S.C. DATE i
UNIVERSITY EAST BUSINESS PARK
Charlotte, North Carolina
Stormwater Wetlands Calculations ,?
elk" /'l:0 G4?b
yq` 999
s
Prepared For:
Mr. Jim Merrifield
The Crosland Group
125 ScaleyBark Road
Charlotte, N.C. 28209
PRELMNARY BRAWNGS

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HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID UNIVERSITY EAST BUSINESS PARK
2 ID WETLAND DETENT ION EVALUATION BASIN #1
3 ID WK DICKSON
4 IT 12 0 0 300
5 IO 5
6 JR PREC 1.0
7 PG 1 1
8 IN 6
9 PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
10 PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
11 PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
12 PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
13 PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
14 PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
15 IN 3
16 KK DRAINAGE AREA
17 KO 0 21
18 KM DRAINAGE
19 BA 0.10
20 PR 1
21 LS 0 88
22 UD 0.26
23 KK SPILLWAY ROUTIN G
24 KM ROCK DAM SP ILLWAY 3' WIDE
25 KO 1
26 RS 1 ELEV 694
27 SV 0 1.2 3.52
28 SE 694 696 698
29 Sa 0 0.21 0.42 0.63 0.84
30 SE 694 694.5 695 695.5 696
31 ST 697 100 3 1.5
32 ZZ
PAGE 1
it
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* BY THE COE IN FEBRUARY 1981
* REVISED 02 AUG 88
* *
* RUN DATE 10/21/1997 TIME 21:06:27
* *
*********************************#**#****
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION
WK DICKSON
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
[TIME 0000 STARTING TIME
NQ 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS L \
JR MULTI-RATIO OPTIO?J
S ECIPITATION ??
1.00
BASIN #1
??'v 0?) -7
00 e
* DODSON AND ASSOCIATES, INC.
* HYDROLOGIST AND CIVIL ENGINEERS
* 7015 W TIDWELL SUITE 107
* HOUSTON, TEXAS 77092
* [phone]
# #
*###*#########******##**###***#*#######

**************
16 KK * DRAINA * GE AREA
* *
**************
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT

ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS
**# #** *** *#* #** *** #4# *4Y Y*# 4YY !+4 4+Y *** Y** *#* 4#4 f** #** t+* *!* *#4 iY+ 44* ##4 *#t Y## *## #YY 4## ### ### ,y#Y Yvf

23 KK * SPILL *
* # WAY ROUTING
+#####+#######
25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTING DATA
26 RS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 694.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 1.2 3.5
28 SE ELEVATION 694.00 696.00 698.00
29 SO DISCHARGE 0. 0. 0. 1. 1.
30 SE ELEVATION 694.00 694.50 695.00 695.50 696.00
31 ST TOP OF DAM
TOPEL 697.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COOD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
###
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .30 .60 .90 1.20 3.52
OUTFLOW .00 .21 .42 .63 .84 301.68
ELEVATION 694.00 694.50 695.00 695.50 696.00 698.00

HYDROGRAPH AT STATION ILL
PLAN 1 , T 0 = 1.00
* #
DA MON HRMN ORD OUT FLOW STOR AGE STAGE * DA MON HRMN ORD OUTFLOW STORAGE STAGE * DA MON HRMN ORD OUTFLOW STORAGE STAGE
1 0000 1 0. .0 694.0 * 1 2000 101 0. .6 694.9 * 2 1600 201 0. .2 694.3
1 0012 2 0. .0 694.0 * 1 2012 102 0. .5 694.9 * 2 1612 202 0. .2 694.3
1 0024 3 0. .0 694.0 * 1 2024 103 0. .5 694.9 * 2 1624 203 0. .2 694.3
1 0036 4 0. .0 694.0 * 1 2036 104 0. .5 694.9 * 2 1636 204 0. .2 694.3
1 0048 5 0. .0 694.0 * 1 2048 105 0. .5 694.9 * 2 1648 205 0. .2 694.3
1 0100 6 0. .0 694.0 * 1 2100 106 0. .5 694.9 * 2 1700 206 0. .2 694.3

1 0112 7 0. .0 694.0 * 1 2112 107 0. .5 694.9 * 2 1712 207 0.
1 0124 8 0. .0 694.0 * 1 2124 108 0. .5 694.9 * 2 1724 208 0.
1 0136 9 0. .0 694.0 * 1 2136 109 0. .5 694.8 * 2 1736 209 0.
0148 10 0. .0 694.0 * 1 2148 110 0. .5 694.8 * 2 1748 210 0.
0200 11 0. .0 694.0 * 1 2200 111 0. .5 694.8 * 2 1800 211 0.
1 X212 12 Q, .0 694.1 * 1
-- 2212 112 0. .5 694.8 * 2 1812 212 0.
0224 13 0. .1 694.2 = Y 2224 113 0. .5 694.8 * 2 1824 213 0.
1 0236 14 0. .2 694.4 * 1 2236 114 0. .5 694.8 * 2 1836 214 0.
1 0248 15 0. .4 694.6 * 1 2248 115 0. .5 694.8 * 2 1848 215 0.
1 0300 16 0. .5 694.8 * 1 2300 116 0. .5 694.8 * 2 1900 216 0.
1 0312 17 0. .6 694.9 * 1 2312 117 0. .5 694.8 * 2 1912 217 0.
1 0324 18 0. .6 695.1 * 1 2324 118 0. .5 694.8 * 2 1924 218 0.
1 0336 19 0. .7 695.2 * 1 2336 119 0. .5 694.8 * 2 1936 219 0.
1 0348 20 1. .8 695.3 * 1 2348 120 0. .4 694.7 * 2 1948 220 0.
1 0400 21 1. .8 695.4 * 2 0000 121 0. .4 694.7 * 2 2000 221 0.
1 0412 22 1. .9 695.5 * 2 0012 122 0. .4 694.7 * 2 2012 222 0.
1 0424 23 1. .9 695.6 * 2 0024 123 0. .4 694.7 * 2 2024 223 0.
1 0436 24 1. 1.0 695.6 * 2 0036 124 0. .4 694.7 * 2 2036 224 0.
1 0448 25 1. 1.0 695.7 * 2 0048 125 0. .4 694.7 * 2 2048 225 0.
1 0500 26 1. 1.0 695.7 * 2 0100 126 0. .4 694.7 * 2 2100 226 0.
1 0512 27 1. 1.1 695.8 * 2 0112 127 0. .4 694.7 * 2 2112 227 0.
1 0524 28 1. 1.1 695.8 * 2 0124 128 0. .4 694.7 * 2 2124 228 0.
1 0536 29 1. 1.1 695.9 * 2 0136 129 0. .4 694.7 * 2 2136 229 0.
1 0548 30 1. 1.1 695.9 * 2 0148 130 0. .4 694.7 * 2 2148 230 0.
1 0600 31 1. 1.1 695.9 * 2 0200 131 0. .4 694.7 * 2 2200 231 0.
1 0612 32 1. 1.1 695.9 * 2 0212 132 0. .4 694.6 * 2 2212 232 0.
1 0624 33 1. 1.1 695.9 * 2 0224 133 0. .4 694.6 * 2 2224 233 0.
1 0636 34 1. 1.1 695.9 * 2 0236 134 0. .4 694.6 * 2 2236 234 0.
1 0648 35 1. 1.1 695.9 * 2 0248 135 0. .4 694.6 * 2 2248 235 0.
1 0700 36 1. 1 1 695.8 * 2 0300 136 0. .4 694.6 * 2 2300 236 0.
1 0712 37 1 ?
Jl 695.8 * 2 0312 137 0. .4 694.6 * 2 2312 237 0.
1 0724 38 1! 1 695.8 * 2 0324 138 0. .4 694.6 * 2 2324 238 0.
1 0736 39 1 695.8 * 2 0336 139 0. .4 694.6 * 2 2336 239 0.
1 0748 40 1.? 1.1 695.8 * 2 0348 140 0. .4 694.6 * 2 2348 240 0.
1 0800 41 1. 1.1 695.8 * 2 0400 141 0. .4 694.6 * 3 0000 241 0.
1 0812 42 1. 1.1 695.8 * 2 0412 142 0. .3 694.6 * 3 0012 242 0.
1 0824 43 1. 1.0 695.7 * 2 0424 143 0. .3 694.6 * 3 0024 243 0.
1 0836 44 1. 1.0 695.7 * 2 0436 144 0. .3 694.6 * 3 0036 244 0.
1 0848 45 1. 1.0 695.7 * 2 0448 145 0. .3 694.6 * 3 0048 245 0.
1 0900 46 1. 1.0 695.7 * 2 0500 146 0. .3 694.6 * 3 0100 246 0.
1 0912 47 1. 1.0 695.7 * 2 0512 147 0. .3 694.5 * 3 0112 247 0.
1 0924 48 1. 1.0 695.7 * 2 0524 148 0. .3 694.5 * 3 0124 248 0.
1 0936 49 1. 1.0 695.7 * 2 0536 149 0. .3 694.5 * 3 0136 249 0.
1 0948 50 1. 1.0 695.6 * 2 0548 150 0. .3 694.5 * 3 0148 250 0.
1 1000 51 1. 1.0 695.6 * 2 0600 151 0. .3 694.5 * 3 0200 251 0.
1 1012 52 1. 1.0 695.6 * 2 0612 152 0. .3 694.5 * 3 0212 252 0.
1 1024 53 1. 1.0 695.6 * 2 0624 153 0. .3 694.5 * 3 0224 253 0.
1 1036 54 1. 1.0 695.6 * 2 0636 154 0. .3 694.5 * 3 0236 254 0.
1 1048 55 1. .9 695.6 * 2 0648 155 0. .3 694.5 * 3 0248 255 0.
1 1100 56 1. .9 695.6 * 2 0700 156 0. .3 694.5 * 3 0300 256 0.
1 1112 57 1. .9 695.5 * 2 0712 157 0. .3 694.5 * 3 0312 257 0.
1 1124 58 1. .9 695.5 * 2 0724 158 0. .3 694.5 * 3 0324 258 0.
1 1136 59 1. .9 695.5 * 2 0736 159 0. .3 694.5 * 3 0336 259 0.
1 1148 60 1. .9 695.5 * 2 0748 160 0. .3 694.5 * 3 0348 260 0.
1 1200 61 1. .9 695.5 * 2 0800 161 0. .3 694.5 * 3 0400 261 0.
1 1212 62 1. .9 695.5 * 2 0812 162 0. .3 694.5 * 3 0412 262 0.
1 1224 63 1. .9 695.4 * 2 0824 163 0. .3 694.5 * 3 0424 263 0.
1 1236 64 1. .9 695.4 * 2 0836 164 0. .3 694.4 * 3 0436 264 0.
1 1248 65 1. .8 695.4 * 2 0848 165 0. .3 694.4 * 3 0448 265 0.
1 1300 66 1. .8 695.4 * 2 0900 166 0. .3 694.4 * 3 0500 266 0.
1 1312 67 1. .8 695.4 * 2 0912 167 0. .3 694.4 * 3 0512 267 0.
1 1324 68 1. .8 695.4 * 2 0924 168 0. .3 694.4 * 3 0524 268 0.
1 1336 69 1. .8 695.3 * 2 0936 169 0. .3 694.4 * 3 0536 269 0.
1 1348 70 1. .8 695.3 * 2 0948 170 0. .3 694.4 * 3 0548 270 0.
1 1400 71 1. .8 695.3 * 2 1000 171 0. .2 694.4 * 3 0600 271 0.
1 1412 72 1. .8 695.3 * 2 1012 172 0. .2 694.4 * 3 0612 272 0.
1 1424 73 1. .8 695.3 * 2 1024 173 0. .2 694.4 * 3 0624 273 0.
1 1436 74 1. .8 695.3 * 2 1036 174 0. .2 694.4 * 3 0636 274 0.
r
1 1448 75 1. .8 695.3 * 2 1048 175 0. .2 694.4 * 3 0648 275 0. 1 694.1
1 1500 76 1. .7 695.2 * 2 1100 176 0. .2 694.4 * 3 0700 276 0. 1 694.1
1 1512 77 1. .7 695.2 * 2 1112 177 0. .2 694.4 * 3 0712 277 0. 1 694.1
1 1524 78 1. .7 695.2 * 2 1124 178 0. .2 694.4 * 3 0724 278 0. 1 694.1
1 1536 79 1. .7 695.2 * 2 1136 179 0. .2 694.4 * 3 0736 279 0. 1 694.1
1 1548 80 0. .7 695.2 * 2 1148 180 0. .2 694.4 * 3 0748 280 0. 1 694.1
1 1600 81 0. .7 695.2 * 2 1200 181 0. .2 694.4 * 3 0800 281 0. 1 694.1
1 1612 82 0. .7 695.2 * 2 1212 182 0. .2 694.4 * 3 0812 282 0. 1 694.1
1 1624 83 0. .7 695.1 * 2 1224 183 0. .2 694.4 * 3 0824 283 0. 1 694.1
1 1636 84 0. .7 695.1 * 2 1236 184 0. .2 694.4 * 3 0836 284 0. 1 694.1
1 1648 85 0. .7 695.1 * 2 1248 185 0. .2 694.4 * 3 0848 285 0. 1 694.1
1 1700 86 0. .7 695.1 * 2 1300 186 0. .2 694.3 * 3 0900 286 0. .1 694.1
1 1712 87 0. .7 695.1 * 2 1312 187 0. .2 694.3 * 3 0912 287 0. 1 694.1
1 1724 88 0. .6 695.1 * 2 1324 188 0. .2 694.3 * 3 0924 288 0. 1 694.1
1 1736 89 0. .6 695.1 * 2 1336 189 0. .2 694.3 * 3 0936 289 0. 1 694.1
1 1748 90 0. .6 695.1 * 2 1348 190 0. .2 694.3 * 3 0948 290 0. 1 694.1
1 1800 91 0. .6 695.0 * 2 1400 191 0. .2 694.3 * 3 1000 291 0. 1 694.1
1 1812 92 0. .6 695.0 * 2 1412 192 0. .2 694.3 * 3 1012 292 0. 1 694.1
1 1824 93 0. .6 695.0 * 2 1424 193 0. .2 694.3 * 3 1024 293 0. 1 694.1
1 1836 94 0. .6 695.0 * 2 1436 194 0. .2 694.3 * 3 1036 294 0. 1 694.1
1 1848 95 0. .6 695.0 * 2 1448 195 0. .2 694.3 * 3 1048 295 0. .1 694.1
1 1900 96 0. .6 695.0 * 2 1500 196 0. .2 694.3 * 3 1100 296 0. .1 694.1
1 1912 97 0. .6 695.0 * 2 1512 197 0. .2 694.3 * 3 1112 297 0. .1 694.1
1 1924 98 0. .6 695.0 * 2 1524 198 0. .2 694.3 * 3 1124 298 0. .1 694.1
1 1936 99 0. .6 694.9 * 2 1536 199 0. .2 694.3 * 3 1136 299 0. .1 694.1
1 1948 100 0. .6 694.9 * 2 1548 200 0. .2 694.3 * 3 1148 300 0. .1 694.1
* *
PEAK OUTFLOW IS 1. AT TIME 5.80 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(CFS) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.80 (CFS) 1. 1. 0. 0.
(INCHES) .069 .192 .253 .253
(AC-FT) 0. 1. 1. 1.
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC-FT) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.80 1. 1. 0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
695.90 5.80 695.76 695.23 694.65 694.65
CUMULATIVE AREA = .10 SQ MI
r
PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO 1
HYDROGRAPH AT DRAINA .10
ROUTED TO SPILL .10
1.00
1 FLOW 8.
TIME 2.60
1 FLOW 1.
TIME 5.80
** PEAK STAGES IN FEET **
1 STAGE 695.90
TIME 5.80
1
PLAN 1 ...............
SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 694.00 697.00 697.00
STORAGE 0. 2. 2.
OUTFLOW 0. 1. 1.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 695.90 .00 1. 1. .00 5.80 .00
*** NORMAL END OF HEC-1 ***
1
-0 -77

0,i7

t i
17 ??
Cot/
14% 1
/" ) j

lJ .? 1'? JI D?

6?? s 0?z1
&qo 0? Z8

Fln,?I l'S t Q CIS
IT-

?'? i1 K S i L yw, ? .

1
HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID UNIVERSITY EAST BUSINESS PARK
2 ID WETLAND DETENTION E VALUATION BASIN #2
3 ID WK DICKSON
4 IT 12 0 0 300
5 IO 5
6 JR PREC 1.0
7 PG 1 1
8 IN 6
9 PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
10 PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
11 PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
12 PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
13 PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
14 PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
15 IN 3
16 KK DRAINAGE AREA
17 KO 0 21
18 KM DRAINAGE
19 BA 0.057
20 PR 1
21 LS 0 88
22 LID 0.05
23 KK SPILLWAY ROUTIN G
24 KM ROCK DAM SP ILLWAY 1 WIDE
25 KO 1
26 RS 1 ELEV 694
27 SV 0 0.17 0.7
28 SE 694 696 698
29 SQ 0 0.07 0.14 0.21 0.28
30 SE 694 694.5 695 695.5 696
31 ST 698 100 3 1.5
32 ZZ
PAGE 1
ti
+++++++*++++++++++*++++++++++***+++++++++
+ +
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* BY THE COE IN FEBRUARY 1981
* REVISED 02 AUG 88
+ +
* RUN DATE 10/21/1997 TIME 21:21:43
+ +
+++++++++++++++++++++++++++++++++++++++++
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION
WK DICKSON
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NO 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
BASIN #2
+ +
* DODSON AND ASSOCIATES, INC.
* HYDROLOGIST AND CIVIL ENGINEERS
* 7015 W TIDWELL SUITE 107
* HOUSTON, TEXAS 77092
* [phone]
+ +
+++++++++++++++++++++++++++++++++++++++
+++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++
++++++++++++++
+ +
16 KK * DRAINA * GE AREA
+ +
++++++++++++++
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
N
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS

**************
* *
23 KK * SPILL *
* * WAY ROUTING
**************
25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTI NG DATA
26 RS STORAGE ROUTIN G
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 694.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 .2 .7
28 SE ELEVATION 694.00 696.00 698.00
29 SO DISCHARGE 0. 0. 0. 0. 0.
30 SE ELEVATION 694.00 694.50 695.00 695.50 696.00
31 ST TOP OF DAM
TOPEL 698.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COLD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
***
COMPUTED STORAGE-OUTFLOW-E LEVATION DATA

STORAGE .00 (INCLUDING FLOW OVER
.04 .09 .13 .17 DAM)
iCy
OUTFLOW .00 .07 .14 .21 .28 6
ELEVATION 694.00 694.50 695.00 695.50 696.00 698.00

HYDROGRAPH AT STATION SPILL
PLAN 1, RATIO = 1.00

DA MON
HRMN ORD OUTFLOW STOR *
AGE STAGE * DA MON HRMN ORD OUTFLOW
*
STORAGE STAGE *
DA MON
HRMN
ORD
OUTFLOW
STORAGE
STAGE
1 0000 1 0. .0 694.0 * 1 2000 101 0. .2 696.1 * 2 1600 201 0. .0 694.2
1 0012 2 0. .0 694.0 * 1 2012 102 0. .2 696.1 * 2 1612 202 0. .0 694.2
1 0024 3 0. .0 694.0 * 1 2024 103 0. .2 696.1 * 2 1624 203 0. .0 694.2
1 0036 4 0. .0 694.0 * 1 2036 104 0. .2 696.0 * 2 1636 204 0. .0 694.2
1 0048 5 0. .0 694.0 * 1 2048 105 0. .2 696.0 * 2 1648 205 0. .0 694.2
1 0100 6 0. .0 694.0 * 1 2100 106 0. .2 696.0 * 2 1700 206 0. .0 694.2
44
1 0112 7 0. .0 694.0 * 1 2112 107 0. .2 696.0 * 2 1712 207 0. .0 694.2
1 0124 8 0. .0 694.0 * 1 2124 108 0. .2 696.0 * 2 1724 208 0. .0 694.2
1 0136 9 0. .0 694.0 * 1 2136 109 0. .2 695.9 * 2 1736 209 0. .0 694.2
1 0148 10 0. .0 694.0 * 1 2148 110 0. .2 695.9 * 2 1748 210 0. .0 694.2
1 0_200 11 0. .0 694.1 * 1 2200 111 0. .2 695.9 * 2 1800 211 0. .0 694.2
1 +0212 12 0. __
.1 694.6 * 1 2212 112 0. .2 695.9 * 2 1812 212 0. .0 694.2
1 0224 13 0. .1 695.6 * 1 2224 113 0. .2 695.9 * 2 1824 213 0. .0 694.1
1 0236 14 0. .2 696.2 * 1 2236 114 0. .2 695.9 * 2 1836 214 0. .0 694.1
1 0248 15 0. .3 696.4 * 1 2248 115 0. .2 695.8 * 2 1848 215 0. .0 694.1
1 0300 16 0. .3 696.5 * 1 2300 116 0. .2 695.8 * 2 1900 216 0. .0 694.1
1 0312 17 0. .3 696.7 * 1 2312 117 0. .2 695.8 * 2 1912 217 0. .0 694.1
1 0324 18 0. .4 696.8 * 1 2324 118 0. .2 695.8 * 2 1924 218 0. .0 694.1
1 0336 19 0. .4 697.0 * 1 2336 119 0. .1 695.7 * 2 1936 219 0. .0 694.1
1 0348 20 0. .5 697.1 * 1 2348 120 0. .1 695.7 * 2 1948 220 0. .0 694.1
1 0400 21 0. .5 697.2 * 2 0000 121 0. .1 695.7 * 2 2000 221 0. .0 694.1
1 0412 22 0. .5 697.3 * 2 0012 122 0. .1 695.7 * 2 2012 222 0. .0 694.1
1 0424 23 0. .5 697.4 * 2 0024 123 0. .1 695.6 * 2 2024 223 0. .0 694.1
1 0436 24 0. .6 697.5 * 2 0036 124 0. .1 695.6 * 2 2036 224 0. .0 694.1
1 0448 25 0. .6 697.6 * 2 0048 125 0. .1 695.6 * 2 2048 225 0. .0 694.1
1 0500 26 1. .6 697.6 * 2 0100 126 0. .1 695.6 * 2 2100 226 0. .0 694.1
1 0512 27 1. .6 697.6 * 2 0112 127 0. .1 695.5 * 2 2112 227 0. .0 694.1
1 0524 28 1. .b 697.7 * 2 0124 128 0. .1 695.5 * 2 2124 228 0. .0 694.1
1 0536 29 1. .6 697.7 * 2 0136 129 0. .1 695.5 * 2 2136 229 0. .0 694.1
1 0548 30 1. .6 697.7 * 2 0148 130 0. .1 695.4 * 2 2148 230 0. .0 694.1
1 0600 31 1. .6 697.7 * 2 0200 131 0. .1 695.4 * 2 2200 231 0. .0 694.1
1 0612 32 1. .Q .6 697.7 * 2 0212 132 0. .1 695.3 * 2 2212 232 0. .0 694.1
1 0624 33 .6 697.7 * 2 0224 133 0. .1 695.3 * 2 2224 233 0. .0 694.1
1 0636 34 6 697.7 * 2 0236 134 0. .1 695.3 * 2 2236 234 0. .0 694.1
1 0648 35 ,? 697.6 * 2 0248 135 0. 1 695.2 * 2 2248 235 0. 0 694.1
1 0700 36 1. 697.6 * 2 0300 136 0. 1 695.2 * 2 2300 236 0. 0 694.1
1 0712 37 1. 0.b 697.6 * 2 0312 137 0. .1 695.2 * 2 2312 237 0. .0 694.1
1 0724 38 1. GJ cl.b 697.6 * 2 0324 138 0. .1 695.1 * 2 2324 238 0. .0 694.1
1 0736 39 1. .6 697.6 * 2 0336 139 0. .1 695.1 * 2 2336 239 0. .0 694.1
1 0748 40 0. .b 697.6 * 2 0348 140 0. .1 695.1 * 2 2348 240 0. .0 694.1
1 0800 41 0. .6 697.5 * 2 0400 141 0. .1 695.0 * 3 0000 241 0. .0 694.1
1 0812 42 0. .6 697.5 * 2 0412 142 0. .1 695.0 * 3 0012 242 0. .0 694.1
1 0824 43 0. .6 697.5 * 2 0424 143 0. .1 695.0 * 3 0024 243 0. .0 694.1
1 0836 44 0. .6 697.4 * 2 0436 144 0. .1 695.0 * 3 0036 244 0. .0 694.1
1 0848 45 0. .5 697.4 * 2 0448 145 0. .1 694.9 * 3 0048 245 0. .0 694.1
1 0900 46 0. .5 697.4 * 2 0500 146 0. .1 694.9 * 3 0100 246 0. .0 694.1
1 0912 47 0. .5 697.3 * 2 0512 147 0. .1 694.9 * 3 0112 247 0. .0 694.1
1 0924 48 0. .5 697.3 * 2 0524 148 0. .1 694.9 * 3 0124 248 0. .0 694.1
1 0936 49 0. .5 697.3 * 2 0536 149 0. .1 694.8 * 3 0136 249 0. .0 694.1
1 0948 50 0. .5 697.3 * 2 0548 150 0. .1 694.8 * 3 0148 250 0. .0 694.1
1 1,000 51 0. .5 697.2 * 2 0600 151 0. .1 694.8 * 3 0200 251 0. .0 694.1
1 1012 52 0. .5 697.2 * 2 0612 152 0. .1 694.8 * 3 0212 252 0. .0 694.1
1 1024 53 0. .5 697.2 * 2 0624 153 0. .1 694.8 * 3 0224 253 0. .0 694.0
1 1036 54 0. .5 697.2 * 2 0636 154 0. .1 694.7 * 3 0236 254 0. .0 694.0
1 1048 55 0. .5 697.1 * 2 0648 155 0. .1 694.7 * 3 0248 255 0. .0 694.0
1 1100 56 0. .5 697.1 * 2 0700 156 0. .1 694.7 * 3 0300 256 0. .0 694.0
1 1112 57 0. .5 697.1 * 2 0712 157 0. .1 694.7 * 3 0312 257 0. .0 694.0
1 1124 58 0. .4 697.0 * 2 0724 158 0. .1 694.7 * 3 0324 258 0. .0 694.0
1 1136 59 0. .4 697.0 * 2 0736 159 0. .1 694.6 * 3 0336 259 0. .0 694.0
1 1148 60 0. .4 697.0 * 2 0748 160 0. .1 694.6 * 3 0348 260 0. .0 694.0
1 1200 61 0. .4 697.0 * 2 0800 161 0. .1 694.6 * 3 0400 261 0. .0 694.0
1 1212 62 0. .4 696.9 * 2 0812 162 0. .1 694.6 * 3 0412 262 0. .0 694.0
1 1224 63 0. .4 696.9 * 2 0824 163 0. .0 694.6 * 3 0424 263 0. .0 694.0
1 1236 64 0. .4 696.9 * 2 0836 164 0. .0 694.6 * 3 0436 264 0. .0 694.0
1 1248 65 0. .4 696.9 * 2 0848 165 0. .0 694.5 * 3 0448 265 0. .0 694.0
1 1300 66 0. .4 696.8 * 2 0900 166 0. .0 694.5 * 3 0500 266 0. .0 694.0
1 1312 67 0. .4 696.8 * 2 0912 167 0. .0 694.5 * 3 0512 267 0. .0 694.0
1 1324 68 0. .4 696.8 * 2 0924 168 0. .0 694.5 * 3 0524 268 0. .0 694.0
1 1336 69 0. .4 696.8 * 2 0936 169 0. .0 694.5 * 3 0536 269 0. .0 694.0
1 1348 70 0. .4 696.7 * 2 0948 170 0. .0 694.5 * 3 0548 270 0. .0 694.0
1 1400 71 0. .4 696.7 * 2 1000 171 0. .0 694.5 * 3 0600 271 0. .0 694.0
1 1412 72 0. .4 696.7 * 2 1012 172 0. .0 694.5 * 3 0612 272 0. .0 694.0
1 1424 73 0. .3 696.7 * 2 1024 173 0. .0 694.4 * 3 0624 273 0. .0 694.0
1 1436 74 0. .3 696.6 * 2 1036 174 0. .0 694.4 * 3 0636 274 0. .0 694.0
It
1448 75 0. .3 696.6 * 2 1048 175 0. .0 694.4 * 3 0648 275 0. .0 694.0
1500 76 0. .3 696.6 * 2 1100 176 0. .0 694.4 * 3 0700 276 0. .0 694.0
1512 77 0. .3 696.6 * 2 1112 177 0. .0 694.4 * 3 0712 277 0. .0 694.0
1524 78 0. .3 696.6 * 2 1124 178 0. .0 694.4 * 3 0724 278 0. .0 694.0
1536 79 0. .3 696.5 * 2 1136 179 0. .0 694.4 * 3 0736 279 0. .0 694.0
1548 80 0. .3 696.5 * 2 1148 180 0. .0 694.4 * 3 0748 280 0. .0 694.0
1600 81 0. .3 696.5 * 2 1200 181 0. .0 694.4 * 3 0800 281 0. .0 694.0
1612 82 0. .3 696.5 * 2 1212 182 0. .0 694.3 * 3 0812 282 0. .0 694.0
1624 83 0. .3 696.4 * 2 1224 183 0. .0 694.3 * 3 0824 283 0. .0 694.0
1636 84 0. .3 696.4 * 2 1236 184 0. .0 694.3 * 3 0836 284 0. .0 694.0
1648 85 0. .3 696.4 * 2 1248 185 0. .0 694.3 * 3 0848 285 0. .0 694.0
1700 86 0. .3 696.4 * 2 1300 186 0. .0 694.3 * 3 0900 286 0. .0 694.0
1712 87 0. .3 696.4 * 2 1312 187 0. .0 694.3 * 3 0912 287 0. .0 694.0
1724 88 0. .3 696.3 * 2 1324 188 0. .0 694.3 * 3 0924 288 0. .0 694.0
1736 89 0. .3 696.3 * 2 1336 189 0. .0 694.3 * 3 0936 289 0. .0 694.0
1748 90 0. .2 696.3 * 2 1348 190 0. .0 694.3 * 3 0948 290 0. .0 694.0
1800 91 0. .2 696.3 * 2 1400 191 0. .0 694.3 * 3 1000 291 0. .0 694.0
1812 92 0. .2 696.3 * 2 1412 192 0. .0 694.3 * 3 1012 292 0. .0 694.0
1824 93 0. .2 696.2 * 2 1424 193 0. .0 694.3 * 3 1024 293 0. .0 694.0
1836 94 0. .2 696.2 * 2 1436 194 0. .0 694.2 * 3 1036 294 0. .0 694.0
1848 95 0. .2 696.2 * 2 1448 195 0. .0 694.2 * 3 1048 295 0. .0 694.0
1900 96 0. .2 696.2 * 2 1500 196 0. .0 694.2 * 3 1100 296 0. .0 694.0
1912 97 0. .2 696.2 * 2 1512 197 0. .0 694.2 * 3 1112 297 0. .0 694.0
1924 98 0. .2 696.1 * 2 1524 198 0. .0 694.2 * 3 1124 298 0. .0 694.0
1936 99 0. .2 696.1 * 2 1536 199 0. .0 694.2 * 3 1136 299 0. .0 694.0
1948 100 0. .2 696.1 * 2 1548 200 0. .0 694.2 * 3 1148 300 0. .0 694.0
*****w**y,**www*wwwww*wwww**w*wwwww.wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
PEAK OUTFLOW IS 1. AT TIME 5.60 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(CFS) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.60 (CFS) 0. 0. 0. 0.
(INCHES) .080
(AC-FT) 0. 1. 1.
11=41 -
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC-FT) (HR) -HR 24-HR 72-HR 59.80-HR
1. 5.60 1. 0. 0. Q
PEAK STAGE TIME MAXIMUM AVER
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
697.71 5.60 697.52 696.62 695.21 695.21
CUMULATIVE AREA = .06 SQ MI
M

PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO 1
1.00
HYDROGRAPH AT DRAINA .06 1 FLOW 6.
TIME 2.40
ROUTED TO SPILL .06 1 FLOW 1.
TIME 0
** PEAK STAGES IN FEET
1 STAGE 697.71
TIME 5.60

PLAN 1 ...............
SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 694.00 698.00 698.00
STORAGE 0. 1. 1.
OUTFLOW 0. 1. 1.

RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF

OF
RESERVOIR
DEPTH
STORAGE
OUTFLOW OVER TOP
MAX OUTFLOW AILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS O
1.00 697.71 .00 1. 1. 00 5.60 *** NORMAL END OF HEC-1 ***

Ac"
?I?v.
U.lov
D C a. 4
f:; " ? -I'
I ?y . Cc :,

?s Na-, -I 1
I VA
---------- - ----? l?.?t .- - ?1? ._lc?-!fit- Z- r?-?-
HEC•1 INPUT
LINE
PAGE 1
10.......1.......2.......3.......4.......5.......6.......7.......8.......9......10
ID UNIVERSITY EAST BUSINESS PARK
ID WETLAND DETENTION EVALUATION BASIN #3
ID WK DIC ON
IT 12 0 0 300
10 5
JR PREC 1.0
PG 1 1
IN 6
PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
IN 3
16
17
18
19
20
21
22
KK DRAINAGE AREA
KO 0 21
KM DRAINAGE
BA 0.007
PR 1
LS 0 ' 88
UD 0.05
23 KK SPILLWAY ROUTING
24 KM ROCK DAM SPILLWAY 1' WIDE
25 KO 1
26 RS 1 ELEV 700
27 SV 0 0.60
28 BE 700 702
29 SO 0 0.14 0.28
30 SE 700 701 702
31 ST 702 100 3 1.5
32 77
......................................... ................,............,.,...,..,
FLOOD HYDROGRAPH PACKAGE (HEC-1) DODSON AND ASSOCIATES, INC.
BY THE COE IN FEBRUARY 1981 HYDROLOGIST AND CIVIL ENGINEERS '
REVISED 02 AUG 88 7015 W TIDWELL SUITE 107 '
HOUSTON, TEXAS 77092 ,
RUN DATE 10/24/1997 TIME 11:04:53 [phone]
.....,.." ............................... ...................... ........
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION BASIN #3
WK DIC ON
510 OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
(PLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NO 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
(CENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
16 KK " DRAINA ' GE AREA
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS
..............
23 KK SPILL ' WAY ROUTING
..............
25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
]PLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTING DATA
26 AS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 700.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 .6
28 SE ELEVATION 700.00 702.00
29 SO DISCHARGE 0. 0. 0.
30 SE ELEVATION 700.00 701.00 702.00
31 ST TOP OF DAM
TOPEL 702.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COOD 3.00 WEIR COEFFICIENT
EXPO 1.50 EXPONENT OF HEAD
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .30
OUTFLOW .00 .14 .28
ELEVATION 700.00 701.00 702.00
..................................................................................................
HYDROGRAPH AT S N SPILL
PLAN 1, RATIO 1.00
DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE
1 0000 1 0. .0 700.0 ' 1 2000 101 0. .0 700.2 ' 2 1600 201 0. .0 700.1
1 0012 2 0. .0 700.0 ' 1 2012 102 0. .0 700.2 ` 2 1612 202 0. .0 700.1
1 0024 3 0. .0 700.0 ' 1 2024103 0. .0 700.2 ` 2 1624 203 0. .0 700.1
1 0036 4 0. .0 700.0 ' 1 2036 104 0. .0 700.2 ' 2 1636 204 0. .0 700.1
1 0048 5 0. .0 700.0 ' 1 2048105 0. .0 700.2 ' 2 1648 205 0. .0 700.1
1 0100 6 0. .0 700.0 ' 1 2100 106 0. .0 700.2 ` 2 1700 206 0. .0 700.1
1 0112 7 0. .0 700.0 ' 1 2112107 0. .0 700.2 ' 2 1712 207 0. .0 700.1
1 0124 8 0. .0 700.0 ' 1 2124108 0. .0 700.2 ' 2 1724 208 0. .0 700.1
1 0136 9 0. .0 700.0 ' 1 2136 109 0. .0 700.2 ' 2 1736 209 0. .0 700.1
1 0148 10 0. .0 700.0 ' 1 2148 110 0. .0 700.2 ' 2 1748 210 0. .0 700.1
1 0200 11 0. .0 700.0 ' 1 2200 111 0. .0 700.2 ' 2 1800 211 0. .0 700.1
1 0212 12 0. .0 700.0 ' 1 2212112 0. .0 700.2 ' 2 1812 212 0. .0 700.1
1 0224 13 0. .0 700.1 ' 1 2224113 0. .0 700.2 ' 2 1824 213 0. .0 700.1
1 0236 14 0. .0 700.1 ' 1 2236 114 0. .0 700.2 ' 2 1836 214 0. .0 700.1
1 0248 15 0. .0 700.1 ' 1 2248 115 0. .0 700.1 ' 2 1848 215 0. .0 700.1
1 0300 16 0. .0 700.1 ' 1 2300116 0. .0 700.1 ' 2 1900 216 0. .0 700.1
1 0312 17 0. .0 700.1 ' 1 2312117 0. .0 700.1 ' 2 1912 217 0. .0 700.1
1 0324 18 0. .1 700.2 ' 1 2324118 0. .0 700.1 ' 2 1924 218 0. .0 700.1
1 0336 19 0. .1 700.2 ' 1 2336 119 0. .0 700.1 ' 2 1936 219 0. .0 700.1
1 0348 20 0. .1 700.2 ' 1 2348120 0. .0 700.1 ' 2 1948 220 0. .0 700.1
1 0400 21 0. .1 700.2 ' 2 0000121 0. .0 700.1 ' 2 2000 221 0. .0 700.1
1 0412 22 0. .1 700.2 ' 2 0012122 0. .0 700.1 ' 2 2012 222 0. .0 700.1
1 0424 23 0. .1 700.2 ' 2 0024123 0. .0 700.1 ' 2 2024 223 0. .0 700.1
1 0436 24 0. .1 700.2 ' 2 0036 124 0. .0 700.1 ' 2 2036 224 0. .0 700.1
1 0448 25 0. .1 700.3 ' 2 0048 125 0. .0 700.1 ' 2 2048.225 0. .0 700.1
1 0500 26 0. .1 700.3 ' 2 0100 126 0. .0 700.1 ' 2 2100 226 0. .0 700.1
1 0512 27 0. .1 700.3 2 0112127 0. .0 700.1 ' 2 2112 227 0. .0 700.1
1 0524 28 0. .1 700.3 ' 2 0124128 0. .0 700.1 ' 2 2124 228 0. .0 700.1
1 0536 29 0. .1 700.3 ' 2 0136 129 0. .0 700.1 ' 2 2136 229 0. .0 700.1
1 0548 30 0. .1 700.3 2 0148 130 0. .0 700.1 ' 2 2148 230 0. .0 700.1
1 0600 31 0. .1 700.3 2 0200 131 0. .0 700.1 ' 2 2200 231 0. .0 700.1
1 0612 32 0. .1 700.3 ' 2 0212132 0. .0 700.1 ' 2 2212 232 0. .0 700.1
1 0624 33 0. .1 700.3 ' 2 0224133 0. .0 700.1 ' 2 2224 233 0. .0 700.1
1 0636 34 0. .1 700.3 ` 2 0236 134 0. .0 700.1 ' 2 2236 234 0. .0 700.1
1 0648 35 0. .1 700.3 ' 2 0248 135 0. .0 700.1 ' 2 2248 235 0. .0 700.1
1 0700 36 0. .1 700.3 ' 2 0300 136 0. .0 700.1 ' 2 2300 236 0. .0 700.1
1 0712 37 0. .1 700.3 ' 2 0312 137 0. .0 700.1 ' 2 2312 237 0. .0 700.1
1 0724 38 0. .1 700.3 ' 2 0324138 0. .0 700.1 ' 2 2324 238 0. .0 700.1
1 0736 39 0. .1 700.3 ' 2 0336 139 0. .0 700.1 ' 2 2336 239 0. .0 700.1
1 0748 40 0. .1 700.3 ' 2 0348 140 0. .0 700.1 ' 2 2348 240 0. .0 700.1
1 0800 41 0. .1 700.3 ' 2 0400 141 0. .0 700.1 ' 3 0000 241 0. .0 700.1
1 0812 42 0. .1 700.3 ' 2 0412142 0. .0 700.1 ' 3 0012 242 0. .0 700.1
1 0824 43 0. .1 700.3 ' 2 0424143 0. .0 700.1 ' 3 0024 243 0. .0 700.1
1 0836 44 0. .1 700.3 ' 2 0436 144 0. .0 700.1 ' 3 0036 244 0. .0 700.1
1 0848 45 0. .1 700.3 ' 2 0448 145 0. .0 700.1 ' 3 0048 245 0. .0 700.1
1 0900 46 0. .1 700.3 ' 2 0500146 0. .0 700.1 ' 3 0100 246 0. .0 700.1
1 0912 47 0. .1 700.3 ' 2 0512 147 0. .0 700.1 ' 3 0112 247 0. .0 700.1
1 0924 48 0. .1 700.3 ' 2 0524148 0. 0 700.1 ' 3 0124 248 0. .0 700.1
1 0936 49 0. .1 700.2 ' 2 0536 149 0. .0 700.1 ' 3 0136 249 0. .0 700.1
1 0948 50 0. .1 700.2 ' 2 0548 150 0. .0 700.1 ' 3 0148 250 0. .0 700.1
1 1000 51 0. .1 700.2 ' 2 0600 151 0. .0 700.1 ' 3 0200 251 0. .0 700.1
1 1012 52 0. .1 700.2 ' 2 0612 152 0. .0 700.1 ' 3 0212 252 0. .0 700.1
1 1024 53 0. .1 700.2 ' 2 0624153 0. .0 700.1 ' 3 0224 253 0. .0 700.1
1 1036 54 0. .1 700.2 ` 2 0636154 0. .0 700.1 ' 3 0236 254 0. .0 700.1
1 1048 55 0. 1 700.2 ' 2 0648 155 0. .0 700.1 ' 3 0248 255 0. .0 700.1
1 1100 56 0. 1 700.2 2 0700156 0. .0 700.1 3 0300256 0. .0 700.1
1 1112 57 0. .1 700.2 ' 2 0712 157 0. .0 700.1 ' 3 0312 257 0. .0 700.0
1 1124 58 0. .1 700.2 ' 2 0724158 0. .0 700.1 ' 3 0324 258 0. .0 700.0
1 1136 59 0. .1 700.2 ' 2 0736 159 0. .0 700.1 ' 3 0336 259 0. .0 700.0
1 1148 60 0. .1 700.2 ' 2 0748 160 0. .0 700.1 ' 3 0348 260 0. .0 700.0
1 1200 61 0. .1 700.2 ' 2 0800 161 0. .0 700.1 ' 3 0400 261 0. .0 700.0
1 1212 62 0. .1 700.2 ' 2 0812162 0. .0 700.1 ' 3 0412 262 0. .0 700.0
1 1224 63 0. .1 700.2 ' 2 0824163 0. .0 700.1 ' 3 0424 263 0. .0 700.0
1 1236 64 0. .1 700.2 ' 2 0836164 0. .0 700.1 ' 3 0436 264 0. .0 700.0
1 1248 65 0. .1 700.2 ' 2 0848 165 0. .0 700.1 ' 3 0448 265 0. .0 700.0
1 1300 66 0. .1 700.2 ' 2 0900 166 0. .0 700.1 ' 3 0500 266 0. .0 700.0
1 1312 67 0. .1 700.2 ' 2 0912 167 0. .0 700.1 ' 3 0512 267 0. .0 700.0
1 1324 68 0. .1 700.2 ' 2 0924 168 0. .0 700.1 ' 3 0524 268 0. .0 700.0
1 1336 69 0. .1 700.2 ' 2 0936 169 0. .0 700.1 ' 3 0536 269 0. .0 700.0
1 1348 70 0. .1 700.2 ' 2 0948 170 0. .0 700.1 ' 3 0548 270 0. .0 700.0
1 1400 71 0. .1 700.2 ' 2 1000 171 0. .0 700.1 ' 3 0600 271 0. .0 700.0
1 1412 72 0. .1 700.2 ' 2 1012 172 0. .0 700.1 ' 3 0612 272 0. .0 700.0
1 1424 73 0. .1 700.2 ' 2 1024173 0. .0 700.1 ' 3 0624 273 0. .0 700.0
1 1436 74 0. .1 700.2 ' 2 1036 174 0. .0 700.1 ' 3 0636 274 0. .0 700.0
1 1448 75 0. .1 700.2 ' 2 1048 175 0. .0 700.1 ' 3 0648 275 0. .0 700.0
1 1500 76 0. .1 700.2 ' 2 1100 176 0. .0 700.1 ' 3 0700 276 0. .0 700.0
1 1512 77 0. .1 700.2 ' 2 1112 177 0. .0 700.1 ' 3 0712 277 0. .0 700.0
1 1524 78 0. .1 700.2 ' 2 1124178 0. .0 700.1 ' 3 0724 278 0. .0 700.0
1 1536 79 0. .1 700.2 ' 2 1136179 0. .0 700.1 ' 3 0736 279 0. .0 700.0
1 1548 80 0. .1 700.2 ' 2 1148180 0. .0 700.1 ' 3 0748 280 0. .0 700.0
1 1600 81 0. .1 700.2 ' 2 1200181 0. .0 700.1 ' 3 0800 281 0. .0 700.0
1 1612 82 0. .1 700.2 ' 2 1212182 0. .0 700.1 ' 3 0812 282 0. .0 700.0
1 1624 83 0. .1 700.2 ' 2 1224183 0. .0 700.1 ' 3 0824 283 0. .0 700.0
1 1636 84 0. .1 700.2 ' 2 1236184 0. .0 700.1 ' 3 0836 284 0. .0 700.0
1 1648 85 0. .1 700.2 ' 2 1248 185 0. .0 700.1 ' 3 0848 285 0. .0 700.0
1 1700 86 0. .1 700.2 ' 2 1300 186 0. .0 700.1 ' 3 0900 286 0: .0 700.0
1 1712 87 0. .1 700.2 ' 2 1312 187 0. .0 700.1 ' 3 0912 287 0. .0 700.0
1 1724 88 0. .1 700.2 ' 2 1324188 0. .0 700.1 ' 3 0924 288 0. .0 700.0
1 1736 89 0. .1 700.2 ' 2 1336189 0. .0 700.1 ' 3 0936 289 0. .0 700.0
1 1748 90 0. .1 700.2 ' 2 1348 190 0. .0 700.1 ' 3 0948 290 0. .0 700.0
1 1800 91 0. .1 700.2 ' 2 1400 191 0. .0 700.1 ' 3 1000 291 0. .0 700.0
1 1812 92 0. .1 700.2 " 2 1412192 0. .0 700.1 ' 3 1012 292 0. .0 700.0
1 1824 93 0. .1 700.2 ' 2 1424193 0. .0 700.1 ' 3 1024 293 0. .0 700.0
1 1836 94 0. .1 700.2 ' 2 1436 194 0. .0 700.1 ' 3 1036 294 0. .0 700.0
1 1848 95 0. .1 700.2 ' 2 1448 195 0. .0 700.1 ' 3 1048 295 0. .0 700.0
1 1900 96 0. .1 700.2 ' 2 1500 196 0. .0 700.1 ' 3 1100 296 0. .0 700.0
1 1912 97 0. .1 700.2 " 2 1512197 0. .0 700.1 ' 3 1112 297 0. .0 700.0
1 1924 98 0. .1 700.2 ' 2 1524198 0. .0 700.1 ' 3 1124 298 0. .0 700.0
1 1936 99 0. .1 700.2 ' 2 1536 199 0. .0 700.1 ' 3 1136 299 0. .0 700.0
1
.... 1948 100
........... .... 0.
........ .1
... „ 700.2 ' 2
............... 1548 200
............... 0.
... .... .0 700.1 ' 3
......... .,..,..,.,, 1148 300
.....,,.,...... 0.
....
,,.. .0 700.0

...,.,,..,..,....,.
PEAK OUTFLOW IS 0. AT TIME 5.60 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(CFS) (HR) 6-HR 24-HR 72-HR 59.80-HR
0. 5.40 (CFS) 0. 0. 0. 0.
(INCHES) .049 .149 .224 .224
(AC-FT) 0. 0. 0. 0.
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC-FT) (HR) 6-HR 24-HR 72-HR 59.80-HR
0. 5.60 0. 0. 0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
700.29 5.60 700.26 700.20 700.12 700.12
CUMULATIVE AREA= .01 SO MI
PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIOI
1.00
HYDROGRAPH AT DRAINA .01 1 FLOW
TIME 2.40
ROUTED TO SPILL .01 1 FLOW 0.
TIME 5.40
" PEAK STAGES IN FEET "
1 A_4
STAGE 70029
TIME 5.60
SUMMARY OF DAM OVERTOPPINGIBREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE
ELEVATION 700.00
STORAGE 0.
OUTFLOW 0.
SPILLWAY CREST TOP OF DAM
702.00 702.00
1. 1.
0. 0.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 700.29 .00 0. 0. .00 5.60 00
- NORMAL END OF HEC-1 ••.
S ?rJ
417
= d?.ls - -- _ --- - - -- _ __.
c-
N:yl
- ?ifaU?- s-ro?? - -

O.o

?o n,56-
?I
- -- -_ _ ------ --- -? --- Ida ??? - - ??_u.wa_? _. ? = l
------ ---- ---
HEC•1 INPUT
LINE
PAGE 1
10.......1.......2.......3.......4.......5.......6.......7.......8.......9......10
ID UNIVERSITY EAST BUSINESS PARK
ID WETLAND DETENTION EVALUATION BASIN #4
ID WK DIC ON
IT 12 0 0 300
10 5
JR PREC 1.0
PG 1 1
IN 6
PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
IN 3
16
17
18
19
20
21
22
KK DRAINAGE AREA
KO 0 21
KM DRAINAGE
BA 0.006
PR 1
LS 0 88
UD 0.05
23 KK SPILLWAY ROUTING
24 KM ROCK DAM SPILLWAY 1' WIDE
25 KO 1
26 RS 1 ELEV 700
27 SV 0 0.08 0.58
28 SE 698 700 702
29 SO 0 0.07 0.43
30 SE 698 700 702
31 ST 702 100 3 1.5
32 ZZ
........................................ .......................................
FLOOD HYDROGRAPH PACKAGE (HEC-1) ' DODSON AND ASSOCIATES, INC. "
BY THE COE IN FEBRUARY 1981 HYDROLOGIST AND CIVIL ENGINEERS
REVISED 02 AUG 88 70 15 W TIDWELL SUITE 107
HOUSTON, TEXAS 77092 '
RUN DATE 1012411997 TIME 14:10:38 [phone]
......................................... ........... .,.........
,.,,....,........
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION BASIN #4
WK DIC ON
510 OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
..............
16 KK DRAINA ' GE AREA
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS
23 KK SPILL ' WAY ROUTING
25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTING DATA
26 RS STORAGE ROUTING
NSTPS 1 NUMBER OFSUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 700.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 .1 .6
28 SE ELEVATION 698.00 700.00 702.00
29 SQ DISCHARGE 0. 0. 0.
30 SE ELEVATION 698.00 700.00 702.00
31 ST TOP OF DAM
TOPEL 702.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COOD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .08
OUTFLOW .00 .07
ELEVATION 698.00 700.00 702.00
HYDROGRAPH AT STATION SPILL
PLAN 1, RATIO= 1.00
Q.
...................................................................................................................................
DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE
1 0000 1 0. .1 700.0 ' 1 2000101 0. .1 699.8 ' 2 1600 201 0. .0 698.5
1 0012 2 0. .1 700.0 ' 1 2012102 0. .1 699.8 ' 2 1612 202 0. .0 698.5
1 0024 3 0. .1 700.0 ' 1 2024103 0. .1 699.8 ' 2 1624 203 0. .0 698.5
1 0036 4 0. .1 700.0 ' 1 2036104 0. .1 699.8 ' 2 1636 204 0. .0 698.5
1 0048 5 0. .1 700.0 ' 1 2048105 0. .1 699.8 ' 2 1648 205 0. .0 698.5
1 0100 6 0. .1 700.0 ' 1 2100106 0. .1 699.7 ' 2 1700 206 0. .0 698.5
1 0112 7 0. .1 700.0 ' 1 2112107 0. .1 699.7 ' 2 1712 207 0. .0 698.5
1 0124 8 0. .1 700.0 ' 1 2124108 0. .1 699.7 ' 2 1724 208 0. .0 698.5
1 0136 9 0. .1 700.0 ' 1 2136 109 0. .1 699.7 ' 2 1736 209 0. .0 698.5
1 0148 10 0. .1 700.0 ' 1 2148110 0. .1 699.7 ' 2 1748 210 0. .0 698.5
1 0200 11 0. .1 700.0 ' 1 2200111 0. .1 699.7 ' 2 1800 211 0. .0 698.5
1 0212 12 0. .1 700.0 ' 1 2212112 0. .1 699.7 ' 2 1812 212 0. .0 698.5
1 0224 13 0. .1 700.0 ' 1 2224113 0. .1 699.7 ' 2 1824 213 0. .0 698.5
1 0236 14 0. .1 700.0 ' 1 2236114 0. .1 699.7 ' 2 1836 214 0. .0 698.5
1 0248 15 0. .1 700.1 ' 1 2248115 0. .1 699.7 ' 2 1848 215 0. .0 698.4
1 0300 16 0. .1 700.1 ' 1 2300116 0. .1 699.7 ' 2 1900 216 0. .0 698.4
1 0312 17 0. .1 700.1 ' 1 2312117 0. .1 699.7 ' 2 1912 217 0. .0 698.4
1 0324 18 0. .1 700.1 ' 1 2324118 0. .1 699.7 ' 2 1924 218 0. .0 698.4
1 0336 19 0. .1 700.1 ' 1 2336 119 0. .1 699.6 ' 2 1936 219 0. .0 698.4
1 0348 20 0. .1 700.1 ' 1 2348120 0. .1 699.6 ' 2 1948 220 0. .0 698.4
1 0400 21 0. .1 700.1 ' 2 0000 121 0. .1 699.6 ' 2 2000 221 0. .0 698.4
1 0412 22 0. .1 700.1 ' 2 0012122 0. .1 699.6 ' 2 2012 222 0. .0 698.4
1 0424 23 0. .1 700.1 ' 2 0024123 0. .1 699.6 ' 2 2024 223 0. .0 698.4
1 0436 24 0. .1 700.2 ' 2 0036124 0. .1 699.6 ' 2 2036 224 0. .0 698.4
1 0448 25 0. .1 700.2 ' 2 0048 125 0. .1 699.6 ' 2 2048 225 0. .0 698.4
1 0500 26 0. .1 700.2 ' 2 0100 126 0. .1 699.6. 2 2100 226 0. .0 698.4
1 0512 27 0. .1 700.2 ' 2 0112127 0. .1 699.6 ' 2 2112 227 0. .0 698.4
1 0524 28 0. .1 700.2 ` 2 0124128 0. .1 699.5 ' 2 2124 228 0. .0 698.4
1 0536 29 0. .1 700.2 ' 2 0136129 0. .1 699.5 ' 2 2136 229 0. .0 698.4
1 0548 30 0. .1 700.2 ' 2 0148 130 0. .1 699.5 ' 2 2148 230 0. .0 698.4
1 0600 31 0. .1 700.2 2 0200131 0. .1 699.5 " 2 2200 231 0. .0 698.4
1 0612 32 0. .1 700.2 ' 2 0212132 0. .1 699.5 ' 2 2212 232 0. .0 698.3
1 0624 33 0. .1 700.1 ' 2 0224133 0. .1 699.5 ' 2 2224 233 0. .0 698.3
1 0636 34 0. .1 700.1 ' 2 0236 134 0. .1 699.4 ' 2 2236 234 0. .0 698.3
1 0648 35 0. .1 700.1 ' 2 0248 135 0. .1 699.4 ' 2 2248 235 0. .0 698.3
1 0700 36 0. .1 700.1 ' 2 0300 136 0. .1 699.4 ' 2 2300 236 0. .0 698.3
1 0712 37 0. .1 700.1 ' 2 0312 137 0. .1 699.4 ' 2 2312 237 0. .0 698.3
1 0724 38 0. .1 700.1 ' 2 0324138 0. .1 699.4 ' 2 2324 238 0. .0 698.3
1 0736 39 0. .1 700.1 • 2 0336 139 0. .1 699.3 ' 2 2336 239 0. .0 698.3
1 0748 40 0. .1 700.1 ' 2 0348140 0. .1 699.3 ' 2 2348 240 0. .0 698.3
1 0800 41 0. .1 700.1 ' 2 0400141 0. .1 699.3 ' 3 0000 241 0. .0 698.3
1 0812 42 0. .1 700.1 ' 2 0412142 0. .1 699.3 ' 3 0012 242 0. .0 698.3
1 0824 43 0. .1 700.1 ' 2 0424143 0. .1 699.3 ' 3 0024 243 0. .0 698.3
1 0836 44 0. .1 700.1 ' 2 0436 144 0. .0 699.2 ' 3 0036 244 0. .0 698.3
1 0848 45 0. .1 700.1 ' 2 0448145 0. .0 699.2 ' 3 0048 245 0. .0 698.3
1 0900 46 0. .1 700.1 ' 2 0500146 0. .0 699.2 ' 3 0100 246 0. .0 698.3
1 0912 47 0. .1 700.1 ' 2 0512147 0. .0 699.2 ' 3 0112 247 0. .0 698.3
1 0924 48 0. .1 700.1 ' 2 0524148 0. .0 699.2 ' 3 0124 248 0. .0 698.3
1 0936 49 0. .1 700.1 ' 2 0536 149 0. .0 699.2 ' 3 0136 249 0. .0 698.3
1 0948 50 0. .1 700.0 ' 2 0548 150 0. .0 699.1 ' 3 0148 250 0. .0 698.3
1 1000 51 0. .1 700.0 ' 2 0600 151 0. .0 699.1 ' 3 0200 251 0. .0 698.3
1 1012 52 0. .1 700.0 ' 2 0612152 0. .0 699.1 ' 3 0212 252 0. .0 698.3
1 1024 53 0. .1 700.0 ' 2 0624153 0. .0 699.1 ' 3 0224 253 0. .0 698.3
1 1036 54 0. .1 700.0 ' 2 0636 154 0. .0 699.1 ' 3 0236 254 0. .0 698.3
1 1048 55 0. .1 700.0 ' 2 0648 155 0. .0 699.1 ' 3 0248 255 0. .0 698.2
1 1100 56 0. .1 700.0 ' 2 0700156 0. .0 699.0 ' 3 0300 256 0. .0 698.2
1 1112 57 0. .1 700.0 ' 2 0712157 0. .0 699.0 ' 3 0312 257 0. .0 698.2
1 1124 58 0. .1 700.0 ' 2 0724158 0. .0 699.0 ' 3 0324 258 0. .0 698.2
1 1136 59 0. .1 700.0 ' 2 0736159 0. .0 699.0 ' 3 0336 259 0. .0 698.2
1 1148 60 0. .1 700.0 ' 2 0748 160 0. .0 699.0 ' 3 0348 260 0. .0 698.2
1 1200 61 0. .1 700.0 ' 2 0800 161 0. .0 699.0 ' 3 0400 261 0. .0 698.2
1 1212 62 0. .1 700.0 ' 2 0812 162 0. .0 699.0 ' 3 0412 262 0. .0 698.2
1 1224 63 0. .1 700.0 ' 2 0824163 0. .0 698.9 ' 3 0424 263 0. .0 698.2
1 1236 64 0. .1 700.0' 2 0836164 0. .0 698.9 ' 3 0436 264 0. .0 698.2
1 1248 65 0. .1 700.0 ' 2 0848165 0. .0 698.9 ' 3 0448 265 0. .0 698.2
1 1300 66 0. .1 700.0 ' 2 0900 166 0. .0 698.9 ' 3 0500 266 0. .0 698.2
1 1312 67 0. .1 700.0 ' 2 0912167 0. .0 698.9 ' 3 0512 267 0. .0 698.2
1 1324 68 0. .1 700.0 ' 2 0924168 0. .0 698.9 ' 3 0524 268 0. .0 698.2
1 1336 69 0. .1 700.0 ' 2 0936169 0. .0 698.9 ' 3 0536 269 0. .0 698.2
1 1348 70 0. .1 700.0 ' 2 0948 170 0. .0 698.9 ' 3 0548 270 0. .0 698.2
1 1400 71 0. .1 699.9 ' 2 1000171 0. .0 698.8 ' 3 0600 271 0. .0 698.2
1 1412 72 0. .1 699.9 ' 2 1012172 0. .0 698.8 ' 3 0612 272 0. .0 698.2
1 1424 73 0. .1 699.9 ' 2 1024173 0. .0 698.8 ' 3 0624 273 0. .0 698.2
1 1436 74 0. .1 699.9 ' 2 1036 174 0. .0 698.8 ' 3 0636 274 0. .0 6982
1 1448 75 0. .1 699.9 ' 2 1048175 0. .0 698.8 ' 3 0648 275 0. .0 698.2
1 1500 76 0. .1 699.9 ' 2 1100176 0. .0 698.8 " 3 0700 276 0. .0 698.2
1 1512 77 0. .1 699.9 ' 2 1112177 0. .0 698.8 ' 3 0712 277 0. .0 6982
1 1524 78 0. .1 699.9 ' 2 1124178 0. .0 698.8 ' 3 0724 278 0. .0 6982
1 1536 79 0. .1 699.9 ' 2 1136179 0. .0 698.7 ' 3 0736 279 0. .0 6982
1 1548 80 0. .1 699.9. 2 1148 180 0. .0 698.7 ' 3 0748 280 0. .0 6982
1 1600 81 0. .1 699.9 2 1200181 0. .0 698.7. 3 0800 281 0. .0 6982
1 1612 82 0. .1 699.9 2 1212182 0. .0 698.7 3 0812282 0. .0 6982
1 1624 83 0. .1 699.9 2 1224183 0. .0 698.7. 3 0824 283 0. .0 698.2
1 1636 84 0. .1 699.9 2 1236184 0. .0 698.7 3 0836 284 0. .0 6982
1 1648 85 0. 1 699.9 ' 2 1248185 0. .0 698.7 ' 3 0848 285 0. .0 6982
1 1700 86 0. 1 699.9 ' 2 1300186 0. .0 698.7 ' 3 0900 286 0. .0 6982
1 1712 87 0. .1 699.9 ' 2 1312187 0. .0 698.7- 3 0912 287 0. .0 698.2
1 1724 88 0. .1 699.9 ' 2 1324188 0. .0 698.7 ' 3 0924 288 0. .0 698.2
1 1736 89 0. .1 699.9 ' 2 1336189 0. .0 698.6 ' 3 0936 289 0. .0 6982
1 1748 90 0. .1 699.8 ' 2 1348190 0. .0 698.6 ' 3 0948 290 0. .0 6982
1 1800 91 0. .1 699.8 2 1400191 0. .0 698.6 ' 3 1000 291 0. .0 698.1
1 1812 92 0. .1 699.8 ' 2 1412192 0. .0 698.6 ' 3 1012 292 0. .0 698.1
1 1824 93 0. .1 699.8 ' 2 1424193 0. .0 698.6 ' 3 1024 293 0. .0 698.1
1 1836 94 0. .1 699.8 ' 2 1436 194 0. .0 698.6 ' 3 1036 294 0. .0 698.1
1 1848 95 0. .1 699.8 ' 2 1448 195 0. .0 698.6 ' 3 1048 295 0. .0 698.1
1 1900 96 0. .1 699.8 ' 2 1500196 0. .0 698.6 ' 3 1100 296 0. .0 698.1
1 1912 97 0. .1 699.8 ' 2 1512 197 0. .0 698.6 ' 3 1112 297 0. .0 698.1
1 1924 98 0. .1 699.8 ' 2 1524198 0. .0 698.6 ' 3 1124 298 0. .0 698.1
1 1936 99 0. .1 699.8 ' 2 1536 199 0. .0 698.6 ' 3 1136 299 0. .0 698.1
1
..... 1948100
.............. 0.
........ .1
..... 699.8 ' 2
............... 1548 200
.......... ..... 0.
... „... .0 698.6 ' 3
.. ................. 1148 300
.... .......... . 0.
....... , .0 698.1

.......
............
PEAK OUTFLOW IS 0. AT TIME 5.60 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(CFS) (HR) 6-HR 24-HR 72-HR 59.80-HR
0. 5.60 (CFS) 0. 0. 0. 0.
(INCHES) .144 .456 .656 .656
(AC-FT) 0. 0. 0. 0.
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC-FT) (HR) 6-HR 24-HR 72-HR 59.80-HR
0. 5.40 0. 0 . 0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
700.17 5.60 700.13 699.95 699.15 699.15
CUMULATIVE AREA= .01 SO MI
PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO1
1.00
HYDROGRAPH AT DRAINA .01 1 FLOW
TIME 2.40
ROUTED TO SPILL .01 1 FLOW 0.
TIME 5.60
PEAK STAGES IN FEET "
1 STAGE 700.17
TIME 5.60
SUMMARY OF DAM OVERTOPPINGBREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 700.00 702.00 702.00
STORAGE 0. 1. 1.
OUTFLOW 0. 0. 0.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF I
OF RESERVOIR DEPTH STORAGE OUTFLOW OVERTOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 700.17 .00 0. 0. .00 5.60 .00
"' NORMAL END OF HEC-1 -
State of North Carolina
Department of Environment,
Health and Natural Resources LTx;VA1
+ •
Division of Water Quality
James B. Hunt, Jr., Governor dft
Wayne McDevitt, Secretary p E H N Fl'
A. Preston Howard, Jr., P.E., Director
August 20, 1997
Mr. Len Rindner
7113 Hickory Nut Drive
Raleigh, NC 27613
Dear Mr. Rindner:
RE: University Business Park - Stormwater management plan
DWQ # 961012
COE # 199702072
Mecklenburg County
Thank you for your letter of 27 July 1997 which described the stormwater
management plan for this development. The concept of renovating and then
utilizing the floodplain of Back Creek is acceptable to DWQ to satisfy the
conditions of our 401 Certification. However we have the following concerns with
the conceptual design which will have to be addressed before we can give
written approval for this stormwater management plan. These concerns are
listed below:
1. Dike construction - Please provide details as to the heigth of the dike,
its construction and maintenance plans.
z
2. Outfall structures - The planned pipe will likely clog in this wooded
environment. We believe that a concrete weir would be more durable
and less subject to maintenance concerns.
3. Operation and maintenance plan - An O & M plan will be needed for
this stormwater management plan which will have to be signed by the
developer.
4. Size - It is not clear whether the two treatment areas are of sufficient
size to adequately handle the stormwater flows. Please provide
calculations as to the areas to be drained into these treatment areas,
the surface areas of the treatment areas, and calculations depicting the
length of the retention time.
5. Monitoring - A plan to monitor the vegetation and soils will be needed
to indicate whether this system is functioning as intended. DWQ is
interested in working with you to design the plan and share in the
monitoring as part of a plan to develop design guidelines for the use of
natural wetlands for stormwater management.
ErMrontnentd Sciences Branch • 4401 Reedy Creek Road Raleigh. North Carolina 27607
Telephone [phone] FAX # [phone]
An Equal opportunity AlttmatNe Action Employer SCM recycled/10' : post consumer paper
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State of North Carolina
Department of Environment,
Health and Natural Resources
Ames& Hunt, Jr., Govemor
Jonathan & Howes, Secretary
Steven J. Levitas, Deputy Secretary

Division of
Environmental
V4
?EHNR
Water Quality
Sciences Branch
4401 Reedy Creek Road
Raleigh, N.C. 27607
FAX:[phone]
FAX TO: I t PA) I v\ ( d I d ") 2W I FAX NUMBER: 76 N - 3 S q ?
(:7570-?9
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PHONE:
NO. OF PAGES INCLUDING THIS SHEET: '-3 1

ENV?R0NM'ENT4L SCIENCES
July 27, 1997 "'
LEONARD S. RINDNER. PWS REE u
Environmental Planning Consultant 7113 Hickory Nut Drive
Landscape Architecture JU? Z,? ,pal Raleigh, NC 27613
Land Planning J 77 [phone]
Mr. John R. Dorney
NCDEHNR - - Department of Water Quality
Environmental Science Laboratories
4401 Reedy Creek Road
Raleigh, NC 27607
Mr. Steve Lund
US Army Corps of Engineers - Reg. Field Office
151 Patton Avenue - Room 143
Asheville, NC 28801 - 5006
Re: University East Business Park - Stormwater Management and Mitigation Plan
Dear Sirs:
On behalf of my client, Mr. Jim Merrifield of The Crosland Group, I am requesting your review of the
enclosed plans and information concerning the development plans for your consideration and approval. This
submittal is based on the requirements of the approved 401 Water Quality Certification for the above
project.
Concept
As reported in the initial application, the areas intended to be utilized as the stormwater management /
wetland mitigation areas may have been wetlands in the past. These wetlands have deteriorated or have been
drained by ditching and creek channelization. Only small and narrow linear areas remain. The proposed plan
is intended to restore wetland hydrology to these areas to mitigate for wetland losses and to provide
stormwater treatment.
The stormwater management/mitigation plan will rely on increasing the frequency and duration of saturation,
flooding, and ponding. This will support the restoration of wetland hydrology as well as greatly enhance the
pollution removal, water storage, aquatic life, and bank stabilization values of this area of the floodplain.
This will be accomplished by directing stormwater from the developed areas of the site as well as off site
drainage coming through the site drainage to the stormwater treatment / mitigation sites. The water will be
diffused into the areas to reduce discharge velocity. A small berm along the floodway encroachment line will
be constructed to detain the flow so that it is released slowly over a 2 to 5 day period through a small outlet
structure at the lower end of the site.
The wetland mitigation/stormwater treatment areas have a diverse population of hydrophytic vegetation that
will likely withstand the increased duration of saturation and ponding in the winter and early spring. Species
in the wetland areas include green ash, sycamore, boxelder, elm, red maple, silky dogwood, and sweet gum.
Herbaceous species currently include honeysuckle, poison ivy, microstegium, and others. Most of the non-
wetland floodplain has been taken over in the understory by privet and eleagnus. These species seem to limit
the natural succession of the overstory to the climax species. It is expected that with increased saturation
some vegetation may be lost. However it is expected that willow, green ash, alder, and Obligate herbaceous
species would succeed naturally. Based on personal field experience the non-native introduced and
aggressive species such as eleagnus, privet, honeysuckle, multiflora rose, blackberry, microstegium, and
other upland species will give way to more native FACW and OBL species such as silky dogwood,
Mr. John Dorney, Mr. Steve Lund
July 27, 1997
Page 2
spicebush, buttonbush, alder, winterberry, elderberry and bottomland tree species in a more saturated and
flooded environment. The herbaceous layer will likely transition to include duck potato, arrow-arum, lizard
tail, sedges, bulrush, spikerush, and smartweed. Without the competition from privet and eleagnus there will
be a greater opportunity for these areas to eventually succeed to bottomland hardwoods such as Willow oak,
Swamp Chestnut oak, Shumard Oak, Overcup oak, and others. As previously indicated in the application
additional vegetation monitoring will be conducted to determine the need for supplemental planting in the
future to enhance the habitat values. Employment of strict erosion and sediment control procedures will be
specified to avoid impacts to water quality and to the proposed stormwater management and mitigation
sites. Control structures such as sedimentation traps, siltation barriers, and/or at a minimum silt fence will be
utilized as necessary.
The goal of the site plan with minimization and mitigation measures is to help balance the environmental
consequences of this development by restoring and creating wetlands, and to protect water quality
downstream . With the project area being is in a rapidly growing and transitioning area of Charlotte, we
believe that this created wetland/stormwater treatment area which is adjacent to Back Creek will have
significant water storage, pollution removal, bank stabilization, aquatic and wildlife values.
Please contact me if you have any questions or require additional explanation. Thank you for your
consideration. We are looking forward to implementing the plan as soon as possible.
Sincerely,
Leonard S. Rindner, PWS
Environmental Planning Consultant
NC Landscape Architect #578
cc: Mr. Jim Merrifield
The Crosland Group, Inc.
125 Scaleybark Road
Charlotte, NC 28209
Mike Joyner - Crosland Group
Kevin Caldwell - WK Dickson
Patrick Watkins - WK Dickson
State of'North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
AT.NWAAM 0 0
?EHNR
November 26, 1996: .
Mecklenburg County
DWQ Project # 961012
APPROVAL of 401 Water Quality Certification and ADDITIONAL CONDITIONS
Mr. Jim Merrifield
The Crosland Group
125 Scaleybark Road
Charlotte, NC 28209
Dear Mr. Merrifield:
You have our approval to place fill material in 0.78 acres of wetlands or waters for the purpose of
constructing a commercial development at University East Business Park near Charlotte, as you described in
your application dated 25 October 1996. After reviewing your application, we have decided that this fill is
covered by General Water Quality Certification Numbers 2732 and 2671. These certifications allow you to
use Nationwide Permit Numbers 14 and 26 when they are issued by the Corps of Engineers.
This approval is only valid for the purpose and design that you described in your application except as
modified below. If you change your project, you must notify us and you may be required to send us a new
application. If total wetland fills for this project (now or in the future) exceed one acre, compensatory
mitigation may be required as described in 15A NCAC 2H.0506 (h) (6) and (7). For this approval to be
valid, you must follow the conditions listed in the attached certification and any additional conditions listed
below. Additional written approval from DWQ is required for stormwater management utilizing a stormwater
wetland design before wetland fill begins. The proposed berm along Back Creek shall be installed before
widespread grading of the site occurs. In addition, you should get any other federal, state or local permits
before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Coastal
Stormwater, Non-Discharge and Water Supply Watershed regulations. This approval will expire when the
accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing.
You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written
petition which conforms to Chapter 150B of the North Carolina General Statutes to the Office of
Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions
are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water
Act. If you have any questions, please telephone John Dorney at 919-733-1786.
Sincerely,
e
ton Howard, Jr.
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Asheville Field Office
Mooresville DWQ Regional Office
Mr. John Domey
Central Files
1A'Rindnerb"
Division of Water Quality - Environmental Sciences Branch 961012.1tr
Environmental Sciences Branch, 4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer • 50% recycled/10% post consumer paper
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
May 27, 1997
IN REPLY REFER TO
Regulatory Branch
Action ID No. 199702072
Mr. Mike Joyner
The Crosland Group
125 Scaleybark Road
Charlotte, North Carolina 28209
Dear Mr. Joyner:
Through our coordination with your planning consultant,
Mr. Leonard S. Rindner, we are in receipt of a January 13, 1997 permit
extension request concerning your Department of the Army Nationwide Permit
No. 26 at the University East Business Park in Charlotte, Mecklenburg County,
North Carolina (see above Action ID).
Although this nationwide permit expired on January 21, 1997, we hereby
verify your activity to be valid ("grandfathered") until January 21, 1998.
This verification is based on our determination that The Crosland Group has
made a significant investment of resources. If your work is not completed
before January 21, 1998 your proposed activity must be reconsidered pursuant
to the new nationwide permits that became effective on February 11, 1997.
Please be reminded that there have been significant changes in the February 11
nationwide permits. Once the "grandfathered" provision expires, there is some
potential that a DA individual permit may be necessary in order to reauthorize
your project. It is incumbent upon you to remain informed of the changes to
nationwide permits, which are announced by public notice when they occur.
All the terms and conditions of the original nationwide permit remain in
full force and effect. It is recommended that you review these in order to
insure compliance. Questions or comments may be addressed to Mr. Steve Lund,
Asheville Field Office, Regulatory Branch, telephone [phone].
Sincerely,
Robert W. Johnson
Office Manager
Asheville Regulatory Field Office
-2-
Copies Furnished:
Mr. Leonard S. Rindner
Environmental Planning Consultant
7113 Hickory Nut Drive
Raleigh, North Carolina 27613
State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr„ Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
' LT.R;WA
T4 *
ID EHNR
November 26, 1996
Mecklenburg County
DWQ Project # 961012
APPROVAL of 401 Water Quality Certification and ADDITIONAL CONDITIONS
Mr. Jim Merrifield
The Crosland Group
125 Scaleybark Road
Charlotte, NC 28209
Dear Mr. Merrifield:
You have our approval to place fill material in 0.78 acres of wetlands or waters for the purpose of
constructing a commercial development at University East Business Park near Charlotte, as you described in
your application dated 25 October 1996. After reviewing your application, we have decided that this fill is
covered by General Water Quality Certification Numbers 2732 and 2671. These certifications allow you to
use Nationwide Permit Numbers 14 and 26 when they are issued by the Corps of Engineers.
This approval is only valid for the purpose and design that you described in your application except as
modified below. If you change your project, you must notify us and you may be required to send us a new
application. If total wetland fills for this project (now or in the future) exceed one acre, compensatory
mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). For this approval to be
valid, you must follow the conditions listed in the attached certification and any additional conditions listed
below. Additional written approval from DWQ is required for stormwater management utilizing a stormwater
wetland design before wetland fill begins. The proposed berm along Back Creek shall be installed before
widespread grading of the site occurs. In addition, you should get any other federal, state or local permits
before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Coastal
Stormwater, Non-Discharge and Water Supply Watershed regulations. This approval will expire when the
accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing.
You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written
petition which conforms to Chapter 150B of the North Carolina General Statutes to the Office of
Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions
are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water
Act. If you have any questions, please telephone John Dorney at 919-733-1786.
Sincerely,,
e ton Howard, Jr.
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Asheville Field Office
Mooresville DWQ Regional Office
Mr. John Dome,
Central Files
Len Rindner
Division of Water Quality • Environmental Sciences Branch 961012.1tr
Environmental Sciences Branch, 4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer • 50% recycled/10% post consumer paper
DIVISION OF WATER QUALITY
November 21, 1996
MEMO TO: John Dorney?
FROM: Rex Gleason
PREPARED BY: Michael L. Parker
SUBJECT: Wetland Staff Report and Recommendatic Q
Permit Year: 96
Applicant Name:
Project Type: B
COE No.
Rec'd from CDA:
Regional Office:
Permit No.: 0001012 Cc
Crosland Group - University Busines
usiness Park Permit Type: NW14, 26
DOT No.:
APP Date from CDA: 10/25/96
MRO Stream Class: C
River Basin/Subbasin: 030711
Wetland Impact: Y
Wetland Requested: 0.7793 ac.
Wetland Score: 39, 62
Mitigation?: Y
Mitigation Size: = 3:1
Wetland Rating Sheet Attached?:
Stream Index No.: 13-117-7
Wetland Type: Headwater Forest
Wetland Acre Est.?: Y
Water Impacted by Fill?: Y
Mitigation Type: restoration,
creation, and enhancement
Request More Info?: Y
Y (see project application)
Project Changes/Conditions been discussed with applicant?: Y
Comments: Applicant appears to have avoided wetland impacts where
possible. The restoration/creation/enhancement of the flood plain area
on the northeast corner of the property should compensate for other
wetland losses as well as satisfy the need for wet detention. The
location of the wetlands on the project site do not lend themselves to
total avoidance, however, the higher rated wetlands (noted as B & E on
the plans) should benefit the most from the creation/enhancement
activities proposed by the applicant. If possible, and upon approval `
of the 401, it is recommended that the applicant consider installation
of the proposed berm so that the new wetland boundaries (created by
the additional flooding) can be identified and construction buffers
established. Land disturbing activities could have a pronounced effect
on this site if allowed to occur within the proposed mitigation area
prior to the installation of the berm and subsequent flooding. If the
berm cannot be established prior to grading, the "anticipated" water
level of the creation/enhancement area should be flagged with at least
a 50 foot grading buffer. Survival of herbaceous species proposed by
the applicant for introduction into the mitigation area will also be
enhanced if properly established several months prior to flooding.
Recommend Issuance of the 401 Certification.
cc: Central Files
h:\401\univbspk.401
JOL
?T ,? ? 1996
?? (t j ?,y 3 G..
University East
Business Park
Charlotte, North Carolina
By
The Crosland rotes
Joint Application Form and Supporting Documentation for
NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION
TO CORPS OF ENGINEERS
NATIONWIDE PERMITS THAT REQUIRE
SECTION 401 CERTIFICATION CONCURRENCE
Prepared For:
Mr. Jim Merrifield
The Crosland Group
125 Scaleybark Road
Charlotte, NC 28209
Prepared By:
Leonard S. Rindner, PWS
Environmental Planning Consultant
7113 Hickory Nut Drive
Raleigh, NC 27613
[phone]
*Subject to verification by the USACE
Date : 10/96
DEM ID:
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT
PRE-CONSTRUCTION NOTIFICATION APPLICATION
FOR NATIONWIDE PERMITS THAT REQUIRE:
CORPS ACTION ID:
1) NOTIFICATION TO THE CORPS OF ENGINEERS
2) APPLICATION FOR SECTION 401 CERTIFICATION
3) COORDINATION WITH THE NC DIVISION OF COASTAL IMNAGEIlENT
SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE
FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). SEVEN
(7) COPIES SHOULD BE SENT TO THE N.C. DIVISION OF ENVIRONMENTAL MANAGEMENT
(SEE AGENCY ADDRESSES SHEET). PLEASE PRINT.
:. OWNERS NAME : I kir, CroS Lgnd Groin
MAILING ADDRESS: 1 2tJ?/VG?? f`-? . GG?a/??? My 2 S ??
SUBDIVISION NAME:
ZIP CODE: 2S7,061
C:.Y: C koyloffL STATE: ML.
PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM
HA:LING ADDRESS ABOVE) Uyl?y??s,h:t e&S-t" Slr?GSS RLP-14-
CbAcord road nd L?lT Gcrn 4 ?1 / ?
2
TELEPHONE NUMBER. (HOME) : (WORK) 7 ?Z3 -07-1
IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS,
=HONE NUMBER:
M/ JIrr f'"(?r?? ?ie,tG( Same. GAS alDove-
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC
M.=.P OR AERIAL PHOTOGRAPHY WITH SCALE) : /???
COUNTY: 1''1 t.G [+? ?c i/a NEAREST TOWN OR CITY: lam' eyL4JG
1
SPECIFIC LOCATION (INCLUDE ROAD
NUMBERS, LANDMARKS, ETC .) : O I CL, C.orwej P-__4.4 0"-?cf W or t-iGefl s
P?e rd hour tFw 14' -4G o+r- Z- 95
6. IMPACTED OR NEAREST STREAM/RIVER:
RIVER BASIN: YQd vc(rl
7a. IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER
(SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER
SUPPLY (WS-I OR WS-II)? YES [ ] NO [?]' IF YES, EXPLAIN:
7b. IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA D=VISION OF C??OA`S'TAL
MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES [ ] NO C?
7c. IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR
L-TST OF COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION?
8a. HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON
THIS PROPERTY? YES [ ] NO [--r' IF YES, PROVIDE ACTION I.D. NUMBER OF
PREVIOUS PERMIT AND ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401
CERTIFICATION):
. 8b. ARE ADDITIONAL FERMI REQUESTS EXPECTED FOR THIS PROPERTY IN THE
FUTURE? YES [ ] NO [,.]?IF YES, DESCRIBE ANTICIPATED WORK:
9a. ESTIMATED TOTAL NUMBER OF ACRES IN TRACT OF LAND: &'10 k, .6
9b. ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE:
1-65 Acea of
2
10a. NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY:
FILLING: -7 141 3 EXCAVATION:
FLOODING:
DRAINAGE:
OTHER:
TOTAL ACRES TO BE IMPACTED : •77115 ac •
10b. (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF
RELOCATED, PROVIDE D ( ? DUCE 0TH BEFOR ND AFTER RELOCATION)
t p c? cyzu'-l :r- 1000
LENGTH BEFORE: t 3, ?50 FT AFTER: -1 X50 L f? FT
WIDTH BEFORE (based on normal high water contours) : ± 3f- j:5/ FT
WIDTH AFTER: FT
AVERAGE DEPTH BEFORE: FT AFTER: FT
(2) STREA`". CHANNEL IMPACTS WILL RESU_T FROM: (CHECK ALL THAT APPLY)
OPEN CHANNEL RELOCATION: PLACEMENT OF PIPE IN.CHP.NNEL:
CHANNEL EXCAVATION: ICONSTRUCTION OF A DA;M/FLOODING:
OTHER: 5.J' 1fe', F!r-4 +G1r i 0'-\ (/N ST? 1 GOrIOr"
11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE
WATERSHED DRAINING TO THE POND?
WHAT IS THE EXPECTED POND SURFACE AREA?
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF
MECHANICAL EQUIPMENT TO BE USED (ATTACH PLANS: 8 1/2" X 11" DRAWINGS
ONLY) :

13. PURPOSE
tJ D51 ^"C OF PROPOSED WORK:
?j t'C / k-- ?-CJ?/?{ 0te
rn e^+ bY^ M4- O to-
O?tJt?q ? ?

3

14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED
OUT IN WETLANDS. (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND
IMPACTS):
15. YOU ARE REQUIRED TO CONTACT THE U.S. FISH AND WILDLIFE SERVICE
(USFWS) AND/OR NATIONAL MARINE FISHERIES SERVICE (NMFS) (SEE AGENCY
ADDRESSES SHEET) REGARDING THE PRESENCE OF ANY FEDERALLY LISTED OR
PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL HABITAT
IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE
CONTACTED: (ATTACH RESPONSES
FROM THESE AGENCIES.)
16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER
(SH?0) (SEE AGENCY ADDRESSES SHEET) REGARDING THE PRESENCE OF HISTORIC
PROPERTIES IN THE PERMIT AREA WHICH MAY BE AFFECTED BY THE PROPOSED
PROJECT. DATE CONTACTED:
17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF
PUBLIC (STATE) LAND?
YES (J NO [ IF NO, GO TO 18)
a. IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL
DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA ENVIRONMENTAL
POLICY ACT?
YES [) NO [
b. IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA
DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE?
YES (I NO [
IF ANSWER TO 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE
STATE CLEARINGHOUSE TO DIVISION OF ENVIRONMENTAL MANAGEMENT REGARDING
COMPLIANCE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT.
QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE
DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH
CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH,
NORTH CAROLINA 27603-8003, TELEPHONE [phone].
4
J %
18. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF
PROPOSED ACTIVITY INVOLVES THE DISCHARGE OF EXCAVATED OR FILL MATERIAL
INTO WETLANDS:
a. WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES
AND PONDS ON THE PROPERTY (FOR NATIONWIDE PERMIT NUMBERS 14, 18, 21, 26,
29, AND 38). ALL STREAMS (INTERMITTENT AND PERMANENT) ON THE PROPERTY
MUST BE SHOWN ON THE MAP. MAP SCALES SHOULD BE 1 INCH EQUALS 50 FEET OR 1
INCH EQUALS 100 FEET OR THEIR EQUIVALENT.
b. IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE
IMPACTED BY PROJECT.
c. IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA
SHEETS RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE.
d. ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQU RED r e. WHAT IS LAND USE OF SURROUNDING PROPERTY? '-
urd c,(on , roe
f. IF APPLICABLE., WHAT IS PROPOSED METHOD OF SEWAGE DISPOS--..: ?
g. SIGNED AND DATED AGENT AUTHORIZATION LETTER, IF APPLICA=- .
NOTE: WETLANDS OR WATERS OF THE U.S. MAY NOT BE IMPACTED PRIOR TO:
1) ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT,
2) EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF
. ENVIRONMENTAL MANAGEMENT (WATER QUALITY) CERTIFICATION, AND
3) (IN THE TWENTY COASTAL COUNTIES ONLY), A LETTER FROM THE
NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED
ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA COASTAL MANAGEMENT
PROGRAM.
Z
L R'S/AGENT'S SI NATURE ATE
(AGENT'S SIGNATURE VALID ONLY
IF AUTHORIZATION LETTER FROM
THE OWNER IS PROVIDED (18g.))
5
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CHARLOTTE SE HARRISBURG QUAD
NATIONAL V1/ETLANE> S INVENTORY MAP
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LEONARD C PUNDNF R
Environmental Planning Consultant 7113 Hickory Nut Drive
Landscape Architecture Raleigh, NC 27613
Land Planning [phone]
October 15, 1996
Mr. Steve Lund
US Army Corps of Engineers - Reg. Field Office
151 Patton Avenue - Room 143
Asheville, NC 28801 - 5006
Mr. John R. Dorney
NCDEHNR - - Department of Water Quality
Environmental Science Laboratories
4401 Reedy Creek Road
Raleigh, NC 27607
Mr. Mike Parker
NCDEHNR - Department of Water Quality
919 North Main Street
Mooresville, NC 28115
Re: University East Business Park - Reaue.
Dear Sirs:
On behalf of my client, Mr. Tim Merrifield of The Crosland Group, I am requesting your review of the
enclosed plans and information concerning the development plans for your consideration and approval under
Nationwide Permit #26.
Background
The proposed use of the site is a business park development in the rapidly growing northeast portion of
Charlotte near the University. After determining that this site was in a desirable location, of sufficient size,
and met preliminary economic requirements, the developer began feasibility planning. During the "due
diligence" period I was asked to conduct a wetland delineation. The wetland areas were delineated in
December, 1995 then verified by Steve Lund of the USACE on January 10, 1996.
Summa&y Q 1udsdictinnat Waters Of the U.S.
1) Wetland Hydroo¢v
Wetland hydrology is provided by a perched water table, seeps, and springs over a clayey subsoil, and
ponding/flooding in the Back Creek floodplain. Wetland hydrology has also been created at an impounded
areas along the existing dirt road. Surface waters include Back Creek and intermittent tributaries. These
wetlands and Back Creek in this vicinity are headwaters.
2) Hydroph4c Vegetation
Vegetation in wetland areas and along tributaries is dominated by Facultative, Facultative Wet, and Obligate
Vegetation and includes red maple, hornbeam, sweet gum, alder, green ash, boxelder, river birch, willow
oak, willow and others. Shrub/scrub layer was dominated by ligustrum, spicebush, silky dogwood, poison
ivy, and smilax. Herbaceous plants include sedges, soft rush, and other typical wetland species.
LEONARD MNER
Environmental Planning Consultant 7113 Hickory Nut Drive
Landscape Architecture Raleigh, NC 27613
Land Planning [phone]
October 15, 1996
Mr. Steve Lund
US Army Corps of Engineers - Reg. Field Office
151 Patton Avenue - Room 143
Asheville, NC 28801 - 5006
Mr. John R. Dorney
NCDEHNR - - Department of Water Quality
Environmental Science Laboratories
4401 Reedy Creek Road
Raleigh, NC 27607
Mr. Mike Parker
NCDEHNR - Department of Water Quality
919 North Main Street
Mooresville, NC 28115
Re: Universitv East Business Park - Reauest for NWP 26 - Approximate 66 Acre Tract at W.T.
Dear Sirs:
On behalf of my client, Mr. Jim Merrifield of The Crosland Group, I am requesting your review of the
enclosed plans and information concerning the development plans for your consideration and approval under
Nationwide Permit #26.
Background
The proposed use of the site is a business park development in the rapidly growing northeast portion of
Charlotte near the University. After determining that this site was in a desirable location, of sufficient size,
and met preliminary economic requirements, the developer began feasibility planning. During the "due
diligence" period 1 was asked to conduct a wetland delineation. The wetland areas were delineated in
December, 1995 then verified by Steve Lund of the USACE on January 10, 1996.
.Summary Q f Jurisdictional Waters Q f the U.S.
1) Wetland Hydrolggy
Wetland hydrology is provided by a perched water table, seeps, and springs over a clayey subsoil, and
ponding/flooding in the Back Creek floodplain. Wetland hydrology has also been created at an impounded
areas along the existing dirt road. Surface waters include Back Creek and intermittent tributaries. These
wetlands and Back Creek in this vicinity are headwaters.
2) Hydroph.,,Iic Vegetation
Vegetation in wetland areas and along tributaries is dominated by Facultative, Facultative Wet, and Obligate
Vegetation and includes red maple, hornbeam, sweet gum, alder, green ash, boxelder, river birch, willow
oak, willow and others. Shrub/scrub layer was dominated by ligustrum, spicebush, silky dogwood, poison
ivy, and smilax. Herbaceous plants include sedges, soft rush, and other typical wetland species.
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 2
Ligustrum, blackberry, and honeysuckle were extremely dense especially in portions of non-wetland
floodplain and probably "choking out" natural succession bottomland hardwood species. In portions of the
floodplain the vegetation is nearly a mono-culture of ligustrum.
3l_ Hydric Soil
Hydric soils caused by saturation, ponding, and flooding and occur as inclusions within the Enon, Helena,
and Monacan soil types on this site. According to Soil Conservation Service, Technical Guide-Section II-A-
2, June 1991, Mo (Monacan) and HeB (Helena) soils are listed as Map Units with inclusions of Hydric Soils
in Mecklenburg County. Other Hydric soils created by hydrological conditions such as flooding and a high or
perched water table were found. The wetland areas apparently occur in a perched water table over a dense
subsoils common to Enon soils. Enon soils may have inclusions of Helena soils at the head of intermittent
tributaries. Adjacent soils are well drained with horizons typical of Cecil soils and Vance Soils. Cecil soils
are usually well suited for urban uses with consideration of slope, erosion, and other localized situations.
JURISDICTIONAL WATERS AND WE'i'I AND DESCRIPTION
1) "A"- Headwater Forest (PFOIA) = ± 0.0691 acre
2) "B"- Headwater Forest (PFOIA) = ± 0.3264 acre
3) "C"- Braided tributaries (PFO1 A) = ± 0.4741 acre
4) "D"- Bed and Bank Tributary (PFOIA) = ± 0.1196 acre
5) "E"- Headwater Forest (PSSIA) = ± 0.0834 acre
6) "F"- Headwater Forest and Tributary (PFO1 A) = ± 0.1372 acre
7) "G"- Former sediment pond (PEM1Ad/PSS1A) =± 0.0848 acre
8) "H"- Isolated ponded area (PUBHh) = ± 0.0055 acre
9) "I" Back Creek = + n,)8,;0
Total Jurisdictional Waters =± 1.5831acres
Back Creek has been channeled (or has substantially eroded) due to withstand the increasing amounts of
stormwater from the surrounding urban areas of Charlotte. This has hydrologically isolated portions of the
adjacent floodplain by reducing the frequency and duration of water inundation and saturation within the
proposed mitigation area. A wide natural riparian berm with a sanitary sewer right-of-way exists on the
south-side of the creek. Large areas of this zone were carefully evaluated during the wetland delineation
process and were nearly determined to be jurisdictional wetlands. These areas are subject to flooding
especially in winter and early spring and are relatively flat and forested. Surface runoff captured behind the
berm in the vicinity of Wetland Area "B" are drained by an existing ditch. The loss of the wetland hydrology
has obviously been enhanced by this ditching and by deposition of sediments from disturbed areas upstream.
The USACE confirmed that these areas are not considered jurisdictional wetlands.
Results Preliminary Discussions with 4A
Areas "B", and "E" in the Back Creek floodplain have high value and impacts to these areas should be
avoided and minimized to the extent feasible. It was noted that several floodplain areas in the vicinity of
these wetlands nearly met the criteria and indicators to be determined wetlands. There were indications that
several areas were drained in the past and these areas may have viable restoration and creation mitigation
potential.

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Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 3
The site plan was briefly reviewed with John Dorney to discuss the possibility of utilizing the floodplains to
meet the stormwater treatment condition. It was pointed out that the size of the areas would need to be
evaluated to see if they adequately provided wet detention. It was also pointed out that these stormwater
wetlands would also enhance, create, and potentially restore previously drained wetlands. The highest value
wetlands regarding water storage, pollution removal, bank stabilization, aquatic life, and wildlife resources
are Area "B", "E" utilizing Guidance for Rating the Values of Wetlands in North Carolina - Fourth Version.
A meeting was held on site with Mike Parker from the NCDWQ-Mooresville Office to review the site and
preliminary proposal. Mike Parker affirmed that the site plan was avoiding the high value wetland areas and
agreed that there was an opportunity to potentially restore areas to wetlands in the floodplain while
satisfying the stormwater detention requirement.
PROPOSED IMPACTS
Impacts to Jurisdictional Waters on this site have been avoided and/or minimized to the extent feasible.
Impacts to wetlands are limited to the following:
1) "A"- Headwater Forest - channel (PFO 1 A) = ± 0.0691 acre
2) "B"- Headwater Forest (PFO 1 A) = ± 0.0000 acre
3) "C"- Braided tributaries (PFOIA) = ± 0.3781 acre
4) "D"- Bed and Bank Tributary (PFOIA) = ± 0.1046 acre
5) "E"- Headwater Forest (PSSIA) = ± 0.0000 acre
6) "F"- Headwater Forest and Tributary (PFOIA) = + 0.1372 acre
7) "G"- Former sediment pond (PEM1Ad/PSS1A) = + 0.0848 acre
8) "H"- Isolated ponded area (PUBHh) = ± 0.0055 acre
Q) "1" - Back Creek = + 0.0000 acre
Total Jurisdictional Waters Impacted = ± 0.7793 acres g z 1
gy
PROPOSED MINDMATION AND MITIGATION.4 (v'('
Avoidance and Minimization
Due to the economic, engineering, and spatial requirements of a development of this magnitude, large
contiguous areas must be graded for building pads and parking. However the following avoidance and
minimization efforts and measures have been taken:
Based on recommendations of the USACE and the NCDWQ impacts to Back Creek and adjacent wetlands
associated with the floodplain have been avoided to the extent feasible. Impacts are limited to small
intermittent tributaries and wetland areas. The developer has proposed restoring a wetland area in the
floodplain by modifying drainage ditches previously installed to drain the area and by maintaining and
enhancing the hydrology.
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 4
Best Management Practices will also be employed to minimize impacts to Jurisdictional Waters. This will
include:
- Siltation Barriers
- Sediment Traps and Diversion Ditches
- Barricades to define construction limits to sensitive sites and to protect trees
- Preconstruction meetings
- Other methods as appropriate
- Vehicular access will be restricted to specific areas to avoid disturbance to adjacent wetlands and
natural areas to be preserved. Methods to prevent short term impacts will be inspected regularly and
maintained during construction of the project. Wetlands to be preserved will be clearly marked prior to
construction to prevent accidental damage to wetlands. The contractors will be held responsible for
unauthorized wetland damage not permitted according to plans and specifications. Preconstruction meetings
shall be held if necessary with representatives of the USACE and the NCDWQ.
Short term construction impacts, primarily stream sedimentation will affect aquatic habitat,
however this will be minimized to the extent practicable to promote rapid recovery. Project construction will
strictly adhere to an approved Sedimentation and Erosion Control Plan. Best Management Practices will
include utilizing siltation trapping ponds and other erosion control structures where appropriate. Impacts
from hazardous materials and other toxins to fish and aquatic life such as fuels will be avoided by not
permitting staging areas to be located near surface waters. Also, as required by the 401 Water Quality
Certification conditions, measures will be taken to prevent "live" or fresh concrete from coming into contact
with waters until the concrete has hardened.
'r
A mitigation plan has been developed for a "no net loss" of wetland habitat, value, and function to the extent
feasible on this site. The gull of this plan is to preserve, protect, and cxpmd the extents of the existing
wetlands to be saved by enhancing riparian habitat, and creating and restoring wetlands in the floodplain.
The type of mitigation shown on the plan are described below generally fall under the categories of
Restoration, Creation and Enhancement. Many areas of the floodplain that are proposed to be utilized
for stormwater treatment may have been wetlands in the past. The additional duration of flooding events and
saturation are likely to restore a substantial portions of this area to wetlands. This is expected to occur
within a 2.5 acre riparian zone in the floodplain.
Hydrology is expected to be supported by runoff from the project site and from the remaining watershed off-
site. While the final extent of the restored wetlands cannot be accurately estimated it is likely that it will be
substantially more than the existing 0.4098 acres of wetlands remaining in the floodplain. If approximately
1.0 acres is restored this will be more than a 3:1 mitigation ratio for vegetated wetlands impacted. Also, the
proposed mitigation and stormwater treatment area is easily accessible for monitoring and could be utilized
for education related purposes.
mingattonlatormwater [ rearment Lnetnuoutemy
The mitigation plan will rely on increasing the frequency and duration of saturation, flooding, and ponding
within the area to support or begin to restore wetland hydrology. This will be accomplished by directing
stormwater to these areas. The water will be diffused utilizing plunge pools, level spreading devices, and/or
other methods to reduce discharge velocity. Then the water will be directed into and within the mitigation
site by a series of natural flow paths. Others manipulated by small berms and excavations may also be
required to enhance water storage. Manipulation of the flow in the existing ditch outlet from these areas may
will be required. The existing riparian berm and parallel sewer line along Back Creek will reinforce the
flooding and ponding regime as well as provide access for monitoring.
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 5
The wetland mitigation area has a diverse population of hydrophytic vegetation that will likely withstand the
increased duration of saturation and ponding in the winter and early spring. Species include green ash,
sycamore, boxelder, elm, red maple, silky dogwood, privet, and sweet gum. Herbaceous species currently
include honeysuckle, poison ivy, microstegium, and others. It is expected that with increased saturation
some vegetation may suffer, such as eleagnus, privet, honeysuckle, and other upland species. However it is
expected that willow, green ash, alder, and other herbaceous species would succeed naturally. Additional
vegetation monitoring will be conducted following issuance of the permit to determine the need for
additional planting in the future to enhance the habitat values.
Employment of strict erosion and sediment control procedures will be specified to avoid impacts to water
quality. Existing wetlands and surface waters and buffer areas will be protected from erosion and
sedimentation during construction and installation of the mitigation sites. Control structures such as
sedimentation traps, siltation barriers, and/or at a minimum silt fence will be utilized as necessary.
minimization and Wgation Summary
- Plans and overall scope of project modified to extent feasible to minimize impacts to the highest
quality wetlands according to NCDWQ Guidelines.
- Enhancing riparian habitat along Back Creek
- Restoring and creating wetlands in the Back Creek floodplain
- Strict adherence to an approved sedimentation control plan and other best management practices.
The specific plans will include:
1. Description of Proposed Mitigation Areas
2. Methods of Construction
3. Grading Plan & Stormdrainage plan
4. Planting Plan if required
5. Monitoring Report
6. Schedule
Mitigation sites will be planted at an initial density of approximately 500 trees woody stems per acre by
utilizing a combination of relocated saplings and bare root seedlings in created areas without existing
vegetation. Vegetation will be supplemented in response to specific conditions in areas of existing
vegetation. This analysis will be provided to the NCDWQ and the USACE. In addition to woody species,
herbaceous plants will be relocated or will be planted in a random / naturalistic pattern and diversity. Trees,
shrubs, and herbaceous plant materials will be selected from the following list.
Scrubahrub
Alnus spp.
Cornus amomum
Salix nigra
Betula nigra
Ilex decidua
Viburnum dentatum
Cephalanthus occidentalis
Lindera benzoin
Others that are approved
Bottondand Hardwood
Carpinus caroliniana Carya spp. Diospyros virginiana
Frax. pennsylvanica Nyssa sylvatica Quercus species
Taxodium distichum
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 6
Zone 1 Wetland areas in temporarily saturated soils or subject to occasional and brief inundation
DAts TxX= &k
April 1 - Jul. 15 Red Top Grass
Smartweed
7 lbs/acre
201bs /acre
Jul. 16 - Sept. 1 Temporary Crop
Jap. Millet or Sorghum 20 lbs /acre
(to be followed by permanent mixture)
Sept. 2 - Nov. 1 Smartweed
Red Top Grass
20 lbs /acre
7 lbs/acre
Nov. 1 - March 31 Temporary Crop 40 lbs /acre
Wheat or Winter Rye
(to be followed by permanent mixture)
Moist to 1 Foot of Water_
Three Square Bulrush
Creeping Spike Rush
Soft Rush
Sedge sp
Lizard Tail
Zone - 2B Shallow Water Plants
Sweet Flag
Arrow-Arum
Duck Potato
Pickerel Weed
Planting shall be in naturalistic / random clumps to encourage diversity. Size at planting and variety may vary
based on availability, cost, and aesthetic objectives
Herbaceous species will be planted at a rate which will result in a coverage of at least 100 stems per square
meter upon germination. Planting will be conducted in the spring and the fall. Annual ryegrass or other
annual vegetation will be utilized in order to provide temporary stabilization during the summer and winter
months or until planting times become available. Existing wetlands and surface waters will be protected from
erosion and sedimentation during construction and installation of the mitigation sites.
Control structures such as sedimentation traps, siltation barriers, and/or at a minimum silt fence will be
utilized as necessary. Future impacts to wetlands that are created and preserved will be protected by the
applicant or by a group designated by the applicant for this purpose. Deed restrictions and protective
covenants will be developed to protect these areas from future development. These deed restrictions will be
submitted to the USACE and the NCDWQ for approval.
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 7
A Stormwater Management Plan will be designed and implemented for the project to meet the 401 Water
Quality Certification requirements. To help offset the loss of the wetlands value and reduce the potential
nutrient impacts downstream the developer proposes utilizing the non-wetland floodplain and to potentially
create/restore storm drainage wetlands as the primary treatment system. Properly designed storm drainage
wetlands/filtration areas have been proven to be a viable solution to reduce pollution. Establishing and
maintaining a natural, forested, low maintenance ecosystem will reduce the volume of runoff, and thereby
reduce erosion and pollutants coming from an area of more intensive land use to a water body. The
reduction of erosion and pollutants occurs through natural mechanisms such as deposition, infiltration,
adsorption, absorption, filtration, and decomposition. Natural forested areas have the capacity for collecting
and storing nutrients and the canopy protects the soil from erosion.
Stormwater Managgnmt Plan Concepts
Stormwater management becomes necessary when increasing the impervious area within an existing natural
area. The impact of the increased runoff and reduction of natural filtration will be analyzed with respect to
the capacity and stability of natural channels and the presence of environmentally sensitive areas.
The Stormwater Management Plan will include:
A. Utilization of natural floodplain and wetland mitigation areas for stormwater treatment. It is
expected that areas within the floodplain will need to be excavated to further increase the water storage and
pollution removal values. The design concepts will be based on information derived from Design of
Stormwater Wetland Systems by Thomas R. Schueler.
The planners will utilize information and guidelines provided by the North Carolina Department of
Environment, Health, and Natural Resources Water Quality Section in developing this stormwater wetland.
Summaly
- Within the area required to serve as an Extended Detention Wetland the permanent pool of water will be
sized as closely as possible using the Table 1.1 in the Stormwater Best Management Practices. NCDEHNR
November. 1995.
- 70% of the the area requir ed will be designed as a marsh with a depth of 0 - 18" with an equal distribution
of area between 0" to 9" an d 9" to 18". A small p ool area 15% of the required surface area) will be located
near the outlet.
- It is expected that h
erbace
ous an
d scrub/shrub w
etland species will rapidly volunteer in the area. Many of
the recommended sp ecies c urrently exist in the ar ea to be utilized for this function. Supplemental plantings
will be selected from Table 11.2 i n the Stormwat er Best_ Manauement Practices. NCDEHNR November.
1995 based on actual field c onditon s.
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 8
Detailed plans for the mitigation areas will be further articulated from the plans included in this document.
These plans will be submitted to the USACE and the NCDWQ for approval. Plans will include :
Site Preparation Requirements
Vegetation Requirements
Tracking and Monitoring Requirements
A monitoring program will be developed to monitor the mitigation areas to include:
Vegetation Parameters
Species Composition and Abundance
Survival
Growth
Monitoring of vegetation will be conducted on a semi-annual basis according to the following general
procedures.
A. Measure growth, species diversity, advise on removal of invasive species.
B. Establishment of a representative sample observation plot of at least 30' radius to record the
number and species of each surviving woody stem and the percent aerial cover of the three most dominant
species.
C. Within the 30' radius area, a 10' radius area will be established to record the three dominant
herbaceous species.
D. Periodic site visits will be conducted for maintenance, aesthetic purposes, and possible
modifications to increase survival rates.
E. Recommendations regarding planting enhancement, if necessary.
E. Field data will be recorded on a monitoring data form and submitted along with representative
photographs in a annual monitoring report. This will be submitted to the NCDWQ and the USACE . At the
end of the third year a report will be prepared for review and to determine the need for future monitoring or
modifications.
Annual Progress Reports will be prepared which summarizes the data collected in the field and notes trends.
Photographs at fixed stations will be taken to document the trends and changes occurring at the sites. These
reports will be furnished to the NCDWQ and the USACE. After the third year of monitoring, a summary
report and as-builts will be furnished to the USACE and NCDEM for review and discussion regarding
compliance of the project with conditions of the permit.
The data collected during the monitoring period will be utilized to evaluate the success of the mitigation
areas. The success criteria will be as follows:
Soil saturation within 12 inches of the surface for a minimum of approximately 12
consecutive days during the early part of the growing season.
Establish at least one hydrology indicator per the 1987 USACE Wetland Delineation
Manual in the sample plot or match adjacent riparian habitat surroundings
Establish at least one hydric soil characteristic or match adjacent riparian habitat
surroundings.
Mr. Steve Lund, Mr. John Dorney, October 15, 1996, Page 9
These vegetative, soil, and hydrological characteristics must be met to determine success of the wetland
mitigation sites.
Schedule
Grading and installation of water control structures where applicable will be conducted concurrently with
project construction and are expected to begin in the summer of 1997. Vegetation planting and installation is
expected to be conducted in the dormant season of January-February 1998 and spring for herbaceous
materials.
THREATENED AN ENDANGERED SPECIES
Federally listed plant and animal species with endangered or threatened status are protected under the
Endangered Species Act of 1973. The US Fish and Wildlife Service has identified two endangered species -
Schweinitz's sunflower (Helianthus schweinitzii), and the Carolina heelsplitter (Lasmigona decorata).
Schweinitz's sunflower thrives in full sun characteristic of successional fields, margins, and forested
openings. A review of USGS (Harrisburg Quad) Maps at the Natural Heritage Program at NCDEHNR in
Raleigh did not indicate any endangered species previously identified on the site. A survey was conducted
based on the existence of open areas in succession and soil types (Enon). No populations of endangered
species were present.
The Carolina heelsplitter is a freshwater mussel which prefers shaded areas either in a ponded portion of a
small stream or in runs along steep banks with moderate current. Primary habitat are waters less than three
feet deep with a soft mud, muddy sand, or shady gravelly substrate. It is normally restricted to protected
silted areas or under banks especially associated with obstructions such as stumps or fallen trees. Its current
distribution according to the US Fish and Wildlife Service is limited to portions of two streams -- Goose
Creek and Waxhaw Creek -- and a small river originating from rural areas in Union County. Therefore it is
not expected to occur on this site.
State Protected Species
The Carolina Darter (Etheostoma collis) is a fish that inhabits small streams such as those found in the
project area. This species has a federal status of Proposed Special Concern and a state status of Special
Concern. The species prefers small clear streams of less than 15' width with moderate to swift current and a
sand/gravel benthic composition. It apparently tolerates a wide range of water quality conditions and
vegetation types adjacent to the streams and appears resistant to pollution. (E. Menhinick). Therefore, strict
adherence to an approved erosion and sedimentation control plan will be maintained during the construction
period in order to control degradation of water quality.
CULTURAL RESOURCES
There are no indications of any existing structures on the project site. A large portion of the site in heavy
secondary succession. The mixed hardwood/pine forest is relatively young following disturbances. Other
areas are disturbed by recent fills and roads. The Office of State Archaeology (OSA) and the Survey and
Planning Branch (SPB) of the NC Department of Cultural Resources - State Historic Preservation Office
(SHPO) was visited in March, 1996 and again on June 11, 1996, to review existing mapping on the USGS
Quad maps, if any. The purpose of this review was to determine if there were previously identified sites in
the project area. Based on the review of the maps at the OSA and at the SPB, no previously identified or
surveyed sites are currently indicated on the maps within the project area.
Mr. Steve Lund, Mr. John Domey, October 15, 1996, Page 10
AQUATIC HABITAT
The aquatic systems in the project area consist of headwater wetlands and intermittent tributaries of Back
Creek. A variety of wildlife is supported by these systems including mammals, birds, reptiles, amphibians,
fish, insects, mollusks, and crustaceans. Therefore strict adherence to an approved erosion and sedimentation
control plan will be maintained during the construction period in order to control degradation of water
quality downstream and protect the areas to be preserved.
Fish Species
Fish species that are most likely to occur in the project area include (but not limited to) in Back creek are
likely to include blue head chub, green and red breasted sunfish, pirate perch, tessellated darter, white sucker
and rosyside dace.
Crustaceans and Shellfish
Cambrus and Procambrus crayfish are expected to inhabit areas near intermittent tributaries. Indigenous and
Amphibians and Reptiles
Amphibians and reptiles that are likely (but not limited to) to occur near streams include dusky and two-lined
salamanders, spring peepers, bullfrog, mud turtle, skink, black snake, and copperhead. Existing habitat is
expected to remain in natural areas close to the banks and in undisturbed wetland areas.
Short term construction impacts, primarily stream sedimentation will affect aquatic habitat, however this will
be minimized to the extent practicable to promote rapid recovery. Project construction will strictly adhere to
an approved sedimentation and erosion control plan.
Best Management Practices will include utilizing siltation trapping ponds and other erosion control
structures where appropriate. Impacts from hazardous materials and other toxins to fish and aquatic life
such as fuels will be avoided by not permitting staging areas to be located near surface waters. Also, as
required by the 401 Water Quality Certification conditions, measures will be taken to prevent "live" or fresh
concrete from coming into contact with waters until the concrete has hardened.
Aquatic resources are expected to be enhanced through the restoration of wetland areas that flood and pond
for longer durations.
CONCLUSION
The 66 acre development will provide enormous economic benefits to the region. The developer's initial plan
utilized more land area to accomplish the spatial planning that made the site more economically viable.
However, based on the quality of the jurisdictional waters and wetlands on this site, the developer through
sensitive site planning has balanced the site's economic viability with its environmental value and
permitability. The goal of the Site Plan and Mitigation Plan is to help balance the environmental
consequences of this intense development by restoring and creating beneficial wetland or riparian habitat and
enhancing and preserving the Jurisdictional Waters of the U. S. remaining on the site. The undisturbed
wetland areas and the mitigation sites will be preserved by the applicant or by a group designated by the
owner for this purpose. They will be managed as a wetland system of high value.
Mr. Steve Lund, W. John Dorney, October 15, 1996, Page 11
Please contact me if you have any questions or require additional explanation. We would like to receive a
response regarding the proposed development indicating any changes or additions that your agency would
require, if any, to be incorporated into the NWP application. I would be more than happy to meet with you
at the site at Wur earliest convenience at the site, if necessary. Thank you for your consideration.

Leonard S. Rindner, PWS
Environmental Planning Consultant
NC Landscape Architect #578
„. --

Fourth Version
' WETLAND RATING WORKSHEET

Project name f??^ ?rrs? -r g?' ??? c? Pf/,IL Nearest road /A alIKI
County mac- Wetland area. -iO acres Wetland width %ho - ?T feet
-
2i? rN nce-
Name of evaluator L--*-?` 1 Date
j
`

" ;land use
acent
Ad
Wetland location
?.
(within 1%2 mile upstreamr upslopex " ;
? on pond or,lake or radius)
n-per=ennial stream
? forested/natural vegetation
? on intermittant stream ? agriculture, urban/suburban ?_a/o .
? iithin interstream divide
impervious surfacea
? other
-
Dormi=t ':'vegetation"-
k>
"
? 0
z'
?Cr
Soil series cG+' ,
(2)
? predominantly organic, - humus, ,?.
Muck, or peat
-sandv
n
al
mi
an
l
LI--
-'
d
on
ner
-
omin
t
y
p
re '
? `predominantly sandy` Flooding and wetness,,
- ? semipermanently `to permanently
flooded or inundated
Hydraulic factors "
' seasonai(y. flooded or inundated
f
ography . .
to
?? stee ? intermittarltfy .flooded or ternparar I y
p
p
? ditched or ehannelted surfiace watery
? Iota! wetland width; >100 feet ? no evidence of,fl©od€ng or.-su7tace

-... _
water
Wetland ty-pee (select one)*
125ot-omIand hardwood forest ? Pine savanna
eadwater forest ? Freshwater marsh
? S,vamp forest ? Boa/fen
? we: flat ? Ephemeral wetland
? Pccosin ? Carolina Bad
? Boa forest ? Other
'"The rat:::, system cannot be applied to salt or brackis : marshes or stream channels
weight '
R
' Water storage
x 4.00

wetiard Score ;
i
Bank/Shore!Ine stabilization /
A
x 4.00 =
--:
Pollutant removal x 5.00
Wildlife habitat ? x 2.00
Aquatic life value x 4.00 =
Recreation/Education x 1.00 =

?L `,add 1 point i in sensitive watershed and > 1 0°,'o nonpcint disturbance within 1 /2 milt- upstream, upslope, or radius ;

57
..., -

'
Fourth Version
WORKSHEET
WETLAND RATING
pf `'s ?y tS• Nearest road
Project name
o feet
-H ?? acres Wetland width 7-0?-`4
tland area
W
-_
e
County
Name of evaluator I--2r ?Irc; z? ate
Adjacent land use
Wetland location

:
(within 1/2 mile upstream upslope

? cn pored or lake or radius),r'?e
;
on perennial stream.. , p
-- forested/natural vegetation
?n intermittantstream . ?{.
agriculture; urban/suburban
[1 within interstream divide
,.
-4- impervious surface
other
Dominant vegetation

: Y?c r? 11or
il"seriea
S
;
o
? predominantly organic = 'humus
':muck, or peat (3) ,
?_'predorlinant[y mineral - non-sandy

predominantly sandy Flooding and wetness
,
[] semipermanently to permanently
flooded or inundated s .
Hydraulic factrs s asona4l floodec[ or ?rindated ,
d or temarary
flood
f
`
t
' e
y
tant
interm
i
rah
? steep topog p y ;

ditched or channelized -
water-
surface
no evidence of, f[oodin or surface
total wetEard width >1 a(} feet
grater ??=w
Wetland type (select one)*
?? ?r--'ttomland hardwood forest
rest
f
t
d
' ? Pine savanna
? Freshwater marsr.
o
er r
wa
p
r,ea ? Boo/fen
? Swamp forest ? Ephemeral we-land
? bVet flat ? Carolina Bay
? :?ocosin ? Other
? Soo forest
*The rating system cannot be applied to salt or brac'.<ish marshes or stream channels
weinht '
s Water storage x 4.00 =
Wetland Score
Bank/S oreline stabilization
2-
l x 4.00 =
-
00
x 5 .
,

'
Pollutant remova .
J Wildlife habitat -f? x 2.00 =
Aquatic life value x 4.00 =
Recreation/Education x 1.00 -
;add 1 point if in sensitive watershed and > 10% nonpoint disturbance within 1/2 mila ucstream, upsiope, or radius
3-72
-
ctc_ rc
-
?2? -T
57
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site: oL-r7 cvHc.oft-r> lro4b/5 w(- HQr--?I<,
Applicant/owner: GpoS??n ?y7?,?L
Investigator: I _?iy ?,.?r7,ye? Date: _ l J ??lv
County: ???,-
State: N C?

Do Normal Circumstances exist on the site?
Is the site significantly disturbed (Atypical Situation)?
Is the area a potential Problem Area?
(If needed, explain on reverse.) (?Fe No
Yes S
(UP No Community ID:
Transect ID:
Plot ID: '-
ptre?

t (Cro rS s )' ma-skc eA_
I'0S" I 1:;,, <1'fr0470,1 TI'?M ?,l)7S?C.Q+M CA?1S'?j'VC.?O'1 ?"CQ
VF T101? ?t-f fc l tale- jai f rarl? dre?,r?c d
Dominant Plaint Soecies^
1. Li a, Snr Y?c t r?rJ? Stratum
T Indicator
rgC, t Dominant Plant Soecies
9
5 trc < Stratum Indicator
*A

- . rcu
JK t-/
2-/L1
MJ?r?Jm ?_ FA'(i 1o.Lr-de_r? br_n stn ?J A4,,,, /
3. ra?tr?J? fi?nnS??tiGnco,_ T 11.?rt.(btryC Cyr' ?Iht%t/1?C ?' ?At?
4.??rMUS /,)rhl/It'G?/)G?,' ?_ ?i4t:..?•,i rw?u5 ??_
12.? ?_ pp?

5. Srvi , r?X f C.?c.4- c?i1C`
y
?G?
f
13.S?11>c 1) i q ?o? OP-L

6.L-On#U40, . IrrONiGA
?
1rl
DAL-'
14.CvrnuS Q&,J1oMU/y) _
+
7. lOle. r,6zeJtcG
yNS H/v Atr 15._1_1q'i_64 e"A <? T/5

Percent of Dominant Species that are OBL, FACW or FAC
(excludi
FAC
?'17
ng
-).
Remarks:
HYDROLOGY
Recorded Data (Describe In Remarks): Wetland Hydrology Indicators:
_ Stream, Lake, or ride Gauge Primary Indicators:
_ Aerial Photographs /fnundated
_ Other
No Recorded Data Available _/Saturated in Upper 12 Inches
Water Marks
_L-brift Lines
/Sediment Deposits
Field Observations: ?rainage Patterns in Wetlands

Depth of Surface Water: :r 1-20 Qn.) Secondary Indicators (2 or more required):
_?Oxidized Root Channels in Upper 12 Inches
"Water-Stained Leaves
a
Depth to Free Water in Pit: Gn.) :/Local Soil Survey Data

Depth to Saturated Soil: O fin.) FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks:
. I- .
W71, 1995 -196-

SOILS
Map Unit Name
(Series and Phase): ?"'j?/>QGG/? ?a?-??G••,,c?a ?xj/
Drainage Class: Grn P r

Taxonomy (Subgroup):
UYCiOI/Gn f 1Ci Field Observations
(?, ?? irm Ma pin ??v5
Confirm
?O Mapped Typel as No
Profile Deseriotion:
Depth Matrix Color Mottle Colors Motile Texture, Concretions,
(inches) Horizon (Munsell Moist) (Munsell Moist) Abundance/Conrrest Structure. etc.
10 Y1? i lo yte- tI4
3'= 7" o tz- s rL- Co C6 M
'7-'?
Hydric Soil Indicators:
_ Histoscl V Concretions
_ Histic Epipedon _
_ High Organic Content in Surface Layer in Sandy Soils
Sulfidic Odor
_ Aquic Moisture Regime _ Organic Streaking in Sandy Soils
?Listed on Local Hydric Soils List
Reducing Conditions
d
-Ch
l
7
?I
L
C _ Listed on National Hydric Soils List
Oth
r (E
l
i
i
R
k
)
aye
or
ow
roms
ors
.g:
o e
a
xp
n
n
emar
s
_
Remarks:
WETLAND DMRMINATION
Hydrophytic Vegetation Present? as No (Circle) (Circle)
Wetland Hydrology Present? a No
Hydric Sails Present? as
No Is this Sampling Point Within a Wetland? Yes No
Remarks:
? reol. ? s 1 M ?
p
7
-197- WTI, 1995
nlJlJ 1 111dC YYC I I.M114LJ Lic I Cr11YIINA I JUN
(1987 COE Wetlands Delineation Manual)
Project/Site: OL-0 Ccv-4xPto I !O wT l- .AX f=+S Date: _ IZ -1(o
Applicant/Owner: ?,?J,,.,n tralc? County: ??,
Investigator: _ Lit ??o,•lE-. State: r-4 c?
Do Normal Circumstances exist on the site? No Community ID:
Is the site significantly disturbed (Atypical Situation)? Yes ® Transect ID:
Is the area a potential Problem Area? es No Plot ID: Z
(If needed, explain on reverse.)
VFGETATION
Dominant Plant Soecies Stratum Indicator Dominant Pliant Soecies Stratum Indicator
1
rA -fie P/6L
1 ?(
2.? ra - ?TLi ?G1 c i / t ??
10. L
-OrN r of
tea.. V '!P?-•
3. /?c? r r?!,r?r+, _? _ ?C? 11P y10, 1A- ylrylln ?? ('? /aG
4.,A C-o/ •;r (S e,+ otr r' e le 12 ? w? a r?< ?? _? rC 1
5.I=GCi?O_
4~Ynn A. i l G/C T _> tied 13. t ^iele?
r
6. 1Jn?r,[N? 1
lkA1nl0.ni?_ AC,
14. _
r(
r1CGtr1/ 15.
S.?CGr A Mow1 LNY1 ?_- ? 16.
Percent of Dominant Species that are OBL. FACW or FAC
(excluding FAC-).
Remarks:
VeY-,[ SkA ((Qw fi%oo
HYDROLOGY
_ Recorded Data (Describe in Remarks): Wedand Hydrology Indicators:
_ Stream, Lake, or ride Gauge Primary Indicators:
_ Aerial Photographs nundated
_ Other
_ No Recorded Data Available _ Saturated in Upper 12 Inches
,,Water Marks
_?Drift Lines
!-Sediment Deposits
Feld Observations: t-6rainage Patterns in Wetlands

Depth of Surface Water: 1i e 1
? -lo fin.) Secondary Indicators (2 or more required):
_
wfbxidized Root Channels in Upper 12 Inches
Water-Stained Leaves
Depth to Free Water in Pit: Q to (in.) cal Soil Survey Data

Depth to Saturated Soil: ?- 1-2Lri (in.) _ FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks:

WTI, 1995 -196-

SOILS
Map Unit Name ?!
(Series and Phase): Gr1
Drzinage Class: i?7 i/?

Taxonom
(S
b
)
l?1L
Q/ Field Observations
?/(J?
y
u
group
:V
? Q1 Confirm Mapped Type? Yes Na
Profile Description:
Depth. Matrix Color Mottle Colors Mottle Texture, Concretions,
(inches) Horizon (Munsell Moist) (Munsell Moist) Abundance/Conrrzst Structure, etc.
C21 - io lyrz- 3
2" /`'Y /? Yid-' o r.'LGr / /?tG/c!!°hS
Hydric Soil Indicators:
_ Histosol -C -on-creti ons
_ Histic Epipedon _
_ High Organic Content in Surface Layer in Sandy Soils
_ Sulfidic Odor _ Organic Streaking in Sandy Soils
_ Aquic Moisture Regime _ Listed on Local Hydric Soils List
Reducing Conditions _ Listed on National Hydric Soils List
eyed or Low-Chrome Colors _ Other (Explain in Remarks)
Remarks::

WETLAND DETERMINATION
Hydrophytic Vegetation Present? No (Circle) (Circle)
Wetland Hydrology Present? a No
Hydric Soils Present? es No Is this Sampling Point Within a Wetland? Yes No
Remarks:
,A -e-eL
Ares ? ? r ry ((?
Approved by H U A ! 2
-197-
WTI, 1995

SOILS
Map Unit Name 9; r , /
(Series and Phase): Oki Drainage Class: W4/,ne4
Field Observations
Taxonomy (Subgroup): / ('YA' g bl'w' /T S Confirm Mapped Type? Yes No
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site: df !> C l?ol?ro ? /6, y,rr- /- AFTz {S Date: I At bI L'
Applicant/Owner; «..,r? Irarc County:.
Investigator: IAN ?f?.re.NE?-- State:
Do Normal Circumstances exist on the site? (yj?P No Community ID:
Is the site significantly disturbed (Atypical Situation)? Yes <:]SMP Transect ID:
Is the area a potential Problem Area? Yes fP Plot ID:

(If needed, explain on reverse.) _
f.(tef,_ L
VEGETATION
Dominant Plant Soecies Stratum Indicator Dominant Plant Species Stratum Indicator
1.-AC.Cr 9. Lon Icerr Iz;? Dan IC.-_
2.-A Cer SaLC,HGiU.r, -aw 10. Q, iPrCuS r J r2 ?_ j?AC.?J
3.J?rnir2/,r-?t \irra?nr? .,<-I- L 11._??Iwrh
4.P I? A I i
ti fi J 12.
5. LI --ioet,-,drop Ittl t
4U w FA-e-• 13.
6._C_o[nus AandA_ T Gtu 14.
7. a 'f_ €/c1 is.
&GmtLe co?j hp_ y Ac:, 16.
Percent of Dominant Species that are OBL. FACW or FAC
l
i o
t
(exc
ud
ng FAC-).
Remarks:
HYDROLOGY
_ Recorded Data (Describe In Remarks): Wetland Hydrology Indicators:
-Stream, Lake, or Tide Gauge Primary Indicators:
_ Aerial Photographs _ Inundated
_ Other -Saturated in Upper 12 Inches
-No Recorded Data Available Water Marks
__?6rift Lines
?Sediment Deposits
Field Observations: 7- rainage Patterns in Wetlands
Secondary Indicators (2 or more required):
Depth of Surface Water: a" fin.) _ Oxidized Root Channels in Upper 12 Inches

Depth to Free Water in Pit:
(in.) _ Watar-Stained Leaves
_ Local Soil Survey Data

Depth to Saturated Soil:
lin.) FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks:
WTI, 1995
-196-
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
MEMORANDUM
Date: December 23, 1997
To: Len Rindner, PWS
From: J. Ray Cox, EIT
14
Environmental Engineer
Subject: University East Business Park
O&M Agreement
DWQ #961012

Comrpents: Sorry this one has been dragging along.'.. t
Y, I brad hoped'we could discuss this one over the ph ne' jirt, mt{ It's a
t :littIe,avrltWard" to get these thoughts down on pap, but it l? give it,
I'a+e Vied to indicate the section of the O&M docu fob 0 t
comment is applicable when appropriate.
1. Item ID: No forebaYs are included in this design.
2. Item IIIA: The "outlet structure" is a rip-rap weir in this case (may be
covered in item I).
3. Item IVA: Do we really need to remove sediment in this case? Will we
create more problems by disturbing vegetation, etc.? If sediment is to be
removed, please elaborate what the established benchmarks are to be.
4. Item VA: What are to remain in their natural state? Berm side slopes?
5. Item VB: Maybe cattails and other aggressive species should be
,selectively controlled to avoid . choking out other desirable species, but I
would think we are encouraging vegetation throughout the wet area in this
case.
6. Item VC: Drawdown time should be monitored, and the weirs inspected
for clogging, but no orifice is included in the design now.
7. The special requirements section should contain guidance on monitoring
of plant survival and wetland function. It should also specify what would
trigger the need for remedial action and what the remedial action would
be.
I hope these suggestions are helpful. I'll be back in the office on January 5, if you want to
call to discuss the document further or set up a meeting. Thanks for your continued
patience and conscientiousness...
weto&m mem
EnvlroonmentW Solenm Branch 4401 Reedy Creek Road Raleigh, North Carolina 27607
Telephone [phone] FAX [phone]
An Foal eooab+dty AftmYN. Action Employs W% mqcbdRO% pod oonsUnw PGPK

/
4.&

'To

tt"

EXTENDED STORMWATER WETLAND MAINTENANCE REQUIREMENTS
Project Name
Responsible Party:
(name and title)
Address:
Project Number
Phone Number
Inspect monthly, or after every significant runoff producing rainfall event, whichever comes
fib
A. Remove debris from outfall area
B. Check and clear weirs and outlet structures of any obstructions.
C. Check the pond side slopes; remove trash, repair eroded areas before the next rainfall
event.
D. Check the forebay for sediment accumulation, erosion and proper operation of the
flow spreader mechanism. Repair as necessary.
Quarterly
A. Inspect the collection system (i.e., catch basins, piping, grassed swales) for proper
functioning. Clear accumulated trash from basin grates and basin bottoms, and check
piping for obstructions.
B. Check pond inlet pipes for undercutting, replace rip-rap, and repair broken pipes.
Every 6 months
A. Remove accumulated sediment from the bottom of the outlet structure.
Annually
A. Based on establish benchmarks, check the pond depth at various points in the pond. If
depth is reduced to 75% of original design depth, sediment will be removed to at least
original design depth.
V General
A. Are to remain in their natural state or are to be allowed to naturalize.
B. Cattails and other indigenous wetland plants, are encouraged along the pond perimeter;
however they must be removed when they cover the entire surface area of the pond.
C. The orifice is designed to draw down the pond in 2-5 days. If the drawdown is not
accomplished in that time, the system may be clogged. The source must be found and
eliminated.
D. All components of the extended stormwater wetland system must be kept in good working
order.
EXTENDED STORMWATER WETLAND MAINTENANCE REQUIREMENTS
(CONTINUED)
V. Special Requirements
I, , hereby acknowledge that I am the financially
responsible party for the maintenance of this detention pond and stormwater wetland. I will perform the
maintenance as outlined above, as part of the Certification of Compliance with Stormwater Regulations
received for this project.
Signature:
Date:
a Notary Public for the State of , County of
do hereby certify that
personally appeared
me this day of , 19 and acknowledged the due execution of the
mg instrument. Witness my hand and official seal,
SEAL
IMy commission expires
OCT 21 197 19:59 FROM FFI CHARLOTTE NE TO 819197339959 PAGE.001 ?(L
Coq 3?? -777? Q?l
6p4) L ? q
L?,(z
070
LZONA M S. RiN137VFR_ PVVS __ _ _
? P Coat _ 7113 Hfidw y Nett Drive
Ard&o t m 2016W4 X C 27,613
Land Pleaniq (919) *70-9191
Ea C0300
? -911
Send To Fax Ni mber : Wf :
To: cJol'1?'1 r ?y
f' In

Reference:
Copy; 1-11 k4- Jolvn?~ From
Crn -?-
'5z5 - 2-1di(,z?

OCT 21 197 20:00 FROM FFI CHARLOTTE NE TO 819197339959 PAGE.002
ii'ENDEb 9FORMWATM WETLAND MAPnMqAW-%
Name
ns+ble Party:.
and dtle)
Ptvjoct Number
jnwxt ned>xtJf or *ff emy Mrto nprr+drtefng rakfaff eve -kiahsrer saws f w
A Remove debris from oud'all area
fi- Check and dear weir of any obsbuvw s.
C. Cbedd the pond aide 8topes, remove trash, repoeir eroded wm before the next rumW
event.
D. Check the forebay for sedmmmt wamviewon, erosion sled proper operation ofthe
flow spreader media un heir as womsery.
Q Y
A Inspect the cAeetiao system (i=-e catch bates, pipit used swakd) for prow
ftmct wix Clear $ccunleted tash from basin grates and basin bottaats, and ciback
piping Ax obMuctious.
B. Check pond b ft pipes for uttdanmkg, replace np-rap, aad rqw broken p? erp s.
L7vmsY 6 ads
A. Remove misted sediment from the bottom of the outlet strumm
car
B. Rated on establish at various poiets to the poisd. If
demb is reduced t ° e original depth, will be ra moved to at ideal
0
A. Mow side slopes, not including normtlly wbwetged vegetated sheik according to the
sewn unless Abowative plan is approvM by NCDWQ Aw slopes that we to be slowed to
natnid= Mmdmum grass hei& wilt be W. unless almrnative plan is approved by
NC'DWQ for dopes that dre to be allowed to mdm*iw
? are w wry po p u
\ the PUterT be Z the
C. l1w. unficc is designed to draw down the pond m 2-5 days- If the dmwdown is not ?
a000Cnphshed in that times the systems rtmg be dogged. 'Tic sdxitvc nit be rand and
eliminated.
b. AN omponwu of the lea=ded stormwwe r w+edwW systeat must be lctpt is good wo
order.
a amy
4toid rr.M
4nn60.1jr,400?
OCT 21 '97 20;00 FROM FFI CHARLOTTE NE TO 819197339959 PAGE.003
r
FM%NDED STQRMDVATFR WETLAND MA iNTENA,NcE REQumnaum
(4MNTPMED)
. hereby acknowledge that I am th* AmmwW
)le party for the maintemmoe of this det n&n poad and atomma w wadand. I will perform the
nee ss a hoed abom as part of the Certf oatio><a of Camphor= with Stormwatw Repda do"
for" project.
Date:
a Notoy Public for the State of -- , cogny of
do hereby certify that PUDOWDY appeared
me t is day of . 19, and ackowledgod the due awcution of the
izrg ioanment, W'aam my baud and oHicW seal,
SEAS.,
** TOTAL PAGE. 003 **
LEONARD S RINDNEIt, PWS
Environmental Planning Consultant 7113 Hickory Nut Drive
Landscape Architecture Raleigh, NC 27613
Land Planning [phone]
Jc-.A L ETTER O T ANSMITTAL
TO : 4M aY? DATE: ! Z 7 7
gkA4
91
ju;l C.&
PROJECT: aw? wile-440 491?-
ITEMS SEMI' :
101410-?
COMMENTS:
BY: 601-1. ow / COPY: ytt?
I
W WK
Engineers
Planners 13ICKSON
Surveyors
COMPUTED BY: P.O.W.- DATE
CHECKED BY: K.S.C. DATE
6w^'17-
BUSINESS PARK
h Carolina
ds Calculations
For:
rrifield
The Crosland Group
125 ScaleyBark Road
Charlotte, N.C. 28209
PREI'MiNki ?` )," Oi?-
q
x'

d
Ale `:)Arrx a7az44 ? 1
na?? ? _ ?? ?eEs
?I - a8

W K
DICKSON
S,?rs
0 M P i E D 3
31
J03 N').
SHEET N0. OF
Id Zv ??
DATE
A
°/0
(,I1 e 0,1? r?Y
WK
F&=wm DICKSON
Survnron
,lay 1V?i12Gj1 COMPUTED BY_
-FHE?KPD BY

?S5
JOB N0.
SHEET NO. Q OF
DATE
DATE
u IX/
i
? ? of a` 5?s
kaq? - ?w 5q
4MU,001? Alr
6q+ ?4
his

HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID UNIVERSITY EAST BUSINESS PARK
2 ID WETLAND DETENTION E VALUATION BASIN #1
3 ID WK DICKSON
4 IT 12 0 0 300
5 IO 5
6 JR PREC 1.0
7 PG 1 1
8 IN 6
9 PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
10 PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
11 PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
12 PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
13 PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
14 PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
15 IN 3
16 KK DRAINAGE AREA
17 KO 0 21
18 KM DRAINAGE
19 BA 0.10
20 PR 1
21 LS 0 88
22 UD 0.26
23 KK SPILLWAY ROUTING
24 KM ROCK DAM SP ILLWAY 3' WIDE
25 KO 1
26 RS 1 ELEV 694
27 SV 0 1.2 3.52
28 SE 694 696 698
29 SC 0 0.21 0.42 0.63 0.84
30 SE 694 694.5 695 695.5 696
31 ST 697 100 3 1.5
32 ZZ
PAGE 1
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* BY THE COE IN FEBRUARY 1981
* REVISED 02 AUG 88
#
* RUN DATE 10/21/1997 TIME 21:06:27
# #
####*####################################
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION BASIN
WK DICKSON
5 10 OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
# #
* DODSON AND ASSOCIATES, INC.
* HYDROLOGIST AND CIVIL ENGINEERS
* 7015 W TIDWELL SUITE 107
* HOUSTON, TEXAS 77092
* [phone]
* *
***############################*#######
#1
*## ### *#* *## *** ### *## #** *## ##* ### *## *** #** *## *## *## ##* *## ### #** #** ### ##* **# ### ### #*# ##* *** *## #*# **#
####**#***####
# #
16 KK * DRAINA * GE AREA
* #
*******#**#*##
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS
wxw txx www www wtw xxw wtw wxt wtx xxx www www www tww wtw xxx wxx txw wxt wxw wxw xtt xww www wxx xtw txx www tww wtx twx wtw twt
twxxxxxtwwwwww
t w
23 KK * SPILL * WAY ROUTIN G
w t
tttwtwwwttxwtt
25 KO OUTPUT CONTROL VARIABLES
PPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTI NG DATA
26 RS STORAGE ROUTIN G
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 694.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 1.2 3.5
28 SE ELEVATION 694.00 696.00 698.00
29 SQ DISCHARGE 0. 0. 0. 1. 1.
30 SE ELEVATION 694.00 694.50 695.00 695.50 696.00
31 ST TOP OF DAM
TOPEL 697.00 ELEVATION AT TOP OF DAM
OAMWID 100.00 DAM WIDTH
COQD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
xwt
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .30 .60 .90 1.20 3.52
OUTFLOW .00 .21 .42 .63 .84 301.68
ELEVATION 694.00 694.50 695.00 695.50 696.00 698.00
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HYDROGRAPH AT STATION SPILL
PLAN 1, RATIO = 1.00
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DA MON HRMN ORD OUTFLOW STORAGE STAGE * DA MON HRMN ORD OUTFLOW STORAGE STAGE * DA MON HRMN ORD OUTFLOW STORAGE STAGE
w t
1 0000 1 0. .0 694.0 * 1 2000 101 0. .6 694.9 * 2 1600 201 0. .2 694.3
1 0012 2 0. .0 694.0 * 1 2012 102 0. .5 694.9 * 2 1612 202 0. .2 694.3
1 0024 3 0. .0 694.0 * 1 2024 103 0. .5 694.9 * 2 1624 203 0. .2 694.3
1 0036 4 0. .0 694.0 * 1 2036 104 0. .5 694.9 * 2 1636 204 0. .2 694.3
1 0048 5 0. .0 694.0 * 1 2048 105 0. .5 694.9 * 2 1648 205 0. .2 694.3
1 0100 6 0. .0 694.0 * 1 2100 106 0. .5 694.9 * 2 1700 206 0. .2 694.3
1 0112 7 0. .0 694.0 * 1 2112 107 0. .5 694.9 * 2 1712 207 0.
1 0124 8 0. .0 694.0 * 1 2124 108 0. .5 694.9 * 2 1724 208 0.
1 0136 9 0. .0 694.0 * 1 2136 109 0. .5 694.8 * 2 1736 209 0.
1 0148 10 0. .0 694.0 * 1 2148 110 0. .5 694.8 * 2 1748 210 0.
1 0200 11 0. .0 694.0 * 1 2200 111 0. .5 694.8 * 2 1800 211 0.
1 0212 12 0. .0 694.1 * 1 2212 112 0. .5 694.8 * 2 1812 212 0.
1 0224 13 0. .1 694.2 * 1 2224 113 0. .5 694.8 * 2 1824 213 0.
1 0236 14 0. .2 694.4 * 1 2236 114 0. .5 694.8 * 2 1836 214 0.
1 0248 15 0. .4 694.6 * 1 2248 115 0. .5 694.8 * 2 1848 215 0.
1 0300 16 0. .5 694.8 * 1 2300 116 0. .5 694.8 * 2 1900 216 0.
1 0312 17 0. .6 694.9 * 1 2312 117 0. .5 694.8 * 2 1912 217 0.
1 0324 18 0. .6 695.1 * 1 2324 118 0. .5 694.8 * 2 1924 218 0.
1 0336 19 0. .7 695.2 * 1 2336 119 0. .5 694.8 * 2 1936 219 0.
1 0348 20 1. .8 695.3 * 1 2348 120 0. .4 694.7 * 2 1948 220 0.
1 0400 21 1. .8 695.4 * 2 0000 121 0. .4 694.7 * 2 2000 221 0.
1 0412 22 1. .9 695.5 * 2 0012 122 0. .4 694.7 * 2 2012 222 0.
1 0424 23 1. .9 695.6 * 2 0024 123 0. .4 694.7 * 2 2024 223 0.
1 0436 24 1. 1.0 695.6 * 2 0036 124 0. .4 694.7 * 2 2036 224 0.
1 0448 25 1. 1.0 695.7 * 2 0048 125 0. .4 694.7 * 2 2048 225 0.
1 0500 26 1. 1.0 695.7 * 2 0100 126 0. .4 694.7 * 2 2100 226 0.
1 0512 27 1. 1.1 695.8 * 2 0112 127 0. .4 694.7 * 2 2112 227 0.
1 0524 28 1. 1.1 695.8 * 2 0124 128 0. .4 694.7 * 2 2124 228 0.
1 0536 29 1. 1.1 695.9 * 2 0136 129 0. .4 694.7 * 2 2136 229 0.
1 0548 30 1. 1.1 695.9 * 2 0148 130 0. .4 694.7 * 2 2148 230 0.
1 0600 31 1. 1.1 695.9 * 2 0200 131 0. .4 694.7 * 2 2200 231 0.
1 0612 32 1. 1.1 695.9 * 2 0212 132 0. .4 694.6 * 2 2212 232 0.
1 0624 33 1. 1.1 695.9 * 2 0224 133 0. .4 694.6 * 2 2224 233 0.
1 0636 34 1. 1.1 695.9 * 2 0236 134 0. .4 694.6 * 2 2236 234 0.
1 0648 35 1. 1.1 695.9 * 2 0248 135 0. .4 694.6 * 2 2248 235 0.
1 0700 36 1. 1.1 695.8 * 2 0300 136 0. .4 694.6 * 2 2300 236 0.
1 0712 37 1. 1.1 695.8 * 2 0312 137 0. .4 694.6 * 2 2312 237 0.
1 0724 38 1. 1.1 695.8 * 2 0324 138 0. .4 694.6 * 2 2324 238 0.
1 0736 39 1. 1.1 695.8 * 2 0336 139 0. .4 694.6 * 2 2336 239 0.
1 0748 40 1. 1.1 695.8 * 2 0348 140 0. .4 694.6 * 2 2348 240 0.
1 0800 41 1. 1.1 695.8 * 2 0400 141 0. .4 694.6 * 3 0000 241 0.
1 0812 42 1. 1.1 695.8 * 2 0412 142 0. .3 694.6 * 3 0012 242 0.
1 0824 43 1. 1.0 695.7 * 2 0424 143 0. .3 694.6 * 3 0024 243 0.
1 0836 44 1. 1.0 695.7 * 2 0436 144 0. .3 694.6 * 3 0036 244 0.
1 0848 45 1. 1.0 695.7 * 2 0448 145 0. .3 694.6 * 3 0048 245 0.
1 0900 46 1. 1.0 695.7 * 2 0500 146 0. .3 694.6 * 3 0100 246 0.
1 0912 47 1. 1.0 695.7 * 2 0512 147 0. .3 694.5 * 3 0112 247 0.
1 0924 48 1. 1.0 695.7 * 2 0524 148 0. .3 694.5 * 3 0124 248 0.
1 0936 49 1. 1.0 695.7 * 2 0536 149 0. .3 694.5 * 3 0136 249 0.
1 0948 50 1. 1.0 695.6 * 2 0548 150 0. .3 694.5 * 3 0148 250 0.
1 1000 51 1. 1.0 695.6 * 2 0600 151 0. .3 694.5 * 3 0200 251 0.
1 1012 52 1. 1.0 695.6 * 2 0612 152 0. .3 694.5 * 3 0212 252 0.
1 1024 53 1. 1.0 695.6 * 2 0624 153 0. .3 694.5 * 3 0224 253 0.
1 1036 54 1. 1.0 695.6 * 2 0636 154 0. .3 694.5 * 3 0236 254 0.
1 1048 55 1. .9 695.6 * 2 0648 155 0. .3 694.5 * 3 0248 255 0.
1 1100 56 1. .9 695.6 * 2 0700 156 0. .3 694.5 * 3 0300 256 0.
1 1112 57 1. .9 695.5 * 2 0712 157 0. .3 694.5 * 3 0312 257 0.
1 1124 58 1. .9 695.5 * 2 0724 158 0. .3 694.5 * 3 0324 258 0.
1 1136 59 1. .9 695.5 * 2 0736 159 0. .3 694.5 * 3 0336 259 0.
1 1148 60 1. .9 695.5 * 2 0748 160 0. .3 694.5 * 3 0348 260 0.
1 1200 61 1. .9 695.5 * 2 0800 161 0. .3 694.5 * 3 0400 261 0.
1 1212 62 1. .9 695.5 * 2 0812 162 0. .3 694.5 * 3 0412 262 0.
1 1224 63 1. .9 695.4 * 2 0824 163 0. .3 694.5 * 3 0424 263 0.
1 1236 64 '1. .9 695.4 * 2 0836 164 0. .3 694.4 * 3 0436 264 0.
1 1248 65 1. .8 695.4 * 2 0848 165 0. .3 694.4 * 3 0448 265 0.
1 1300 66 1. .8 695.4 * 2 0900 166 0. .3 694.4 * 3 0500 266 0.
1 1312 67 1. .8 695.4 * 2 0912 167 0. .3 694.4 * 3 0512 267 0.
1 1324 68 1. .8 695.4 * 2 0924 168 0. .3 694.4 * 3 0524 268 0.
1 1336 69 1. .8 695.3 * 2 0936 169 0. .3 694.4 * 3 0536 269 0.
1 1348 70 1. .8 695.3 * 2 0948 170 0. .3 694.4 * 3 0548 270 0.
1 1400 71 1. .8 695.3 * 2 1000 171 0. .2 694.4 * 3 0600 271 0.
1 1412 72 1. .8 695.3 * 2 1012 172 0. .2 694.4 * 3 0612 272 0.
1 1424 73 1. .8 695.3 * 2 1024 173 0. .2 694.4 * 3 0624 273 0.
1 1436 74 1. .8 695.3 * 2 1036 174 0. .2 694.4 * 3 0636 274 0.
1 1448 75 1. .8 695.3 * 2 1048 175 0. .2 694.4 * 3 0648 275 0.
1 1500 76 1. .7 695.2 * 2 1100 176 0. .2 694.4 * 3 0700 276 0.
1 1512 77 1. .7 695.2 * 2 1112 177 0. .2 694.4 * 3 0712 277 0.
1 1524 78 1. .7 695.2 * 2 1124 178 0. .2 694.4 * 3 0724 278 0.•
1 1536 79 1. .7 695.2 * 2 1136 179 0. .2 694.4 * 3 0736 279 0.
1 1548 80 0. .7 695.2 * 2 1148 180 0. .2 694.4 * 3 0748 280 0.
1 1600 81 0. .7 695.2 * 2 1200 181 0. .2 694.4 * 3 0800 281 0.
1 1612 82 0. .7 695.2 * 2 1212 182 0. .2 694.4 * 3 0812 282 0.
1 1624 83 0. .7 695.1 * 2 1224 183 0. .2 694.4 * 3 0824 283 0.
1 1636 84 0. .7 695.1 * 2 1236 184 0. .2 694.4 * 3 0836 284 0.
1 1648 85 0. .7 695.1 * 2 1248 185 0. .2 694.4 * 3 0848 285 0.
1 1700 86 0. .7 695.1 * 2 1300 186 0. .2 694.3 * 3 0900 286 0.
1 1712 87 0. .7 695.1 * 2 1312 187 0. .2 694.3 * 3 0912 287 0.
1 1724 88 0. .6 695.1 * 2 1324 188 0. .2 694.3 * 3 0924 288 0.
1 1736 89 0. .6 695.1 * 2 1336 189 0. .2 694.3 * 3 0936 289 0.
1 1748 90 0. .6 695.1 * 2 1348 190 0. .2 694.3 * 3 0948 290 0.
1 1800 91 0. .6 695.0 * 2 1400 191 0. .2 694.3 * 3 1000 291 0.
1 1812 92 0. .6 695.0 * 2 1412 192 0. .2 694.3 * 3 1012 292 0.
1 1824 93 0. .6 695.0 * 2 1424 193 0. .2 694.3 * 3 1024 293 0.
1 1836 94 0. .6 695.0 * 2 1436 194 0. .2 694.3 * 3 1036 294 0..
1 1848 95 0. .6 695.0 * 2 1448 195 0. .2 694.3 * 3 1048 295 0.
1 1900 96 0. .6 695.0 * 2 1500 196 0. .2 694.3 * 3 1100 296 0.
1 1912 97 0. .6 695.0 * 2 1512 197 0. .2 694.3 * 3 1112 297 0.
1 1924 98 0. .6 695.0 * 2 1524 198 0. .2 694.3 * 3 1124 298 0.
1 1936 99 0. .6 694.9 * 2 1536 199 0. .2 694.3 * 3 1136 299 0.
1 1948 100 0. .6 694.9 * 2 1548 200 0. .2 694.3 * 3 1148 300 0.
# #

PEAK.OUTFLOW IS 1. AT TIME 5.80 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(CFS) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.80 (CFS) 1. 1. 0. 0.
(INCHES) .069 .192 .253 .253
(AC-FT) 0. 1. 1. 1.
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC-FT) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.80 1. 1. 0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
695.90 5.80 695.76 695.23 694.65 694.65
CUMULATIVE AREA = .10 SQ MI
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1
1 694.1

PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO 1
1.00
HYDROGRAPH AT DRAINA .10 1 FLOW 8.
TIME 2.60
ROUTED TO SPILL .10 1 FLOW 1.
TIME 5.80
** PEAK STAGES IN FEET **
1 STAGE 695.90
TIME 5.80
SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 694.00 697.00 697.00
STORAGE 0. 2. 2.
OUTFLOW 0. 1. 1.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 695.90 .00 1. 1. .00 5.80 .00
*** NORMAL END OF HEC-1 ***

6q+
04.5,
021
Irv OF k4_1 la4s_
F?C-ti+?J px-ttgC A< Z ?
?rs l Z ?,
ab-,> orr 50 ?
HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID UNIVERSITY EAST BUSINESS PARK
2 ID WETLAND DETENTION E VALUATION BASIN #2
3 ID WK DICKSON
4 IT 12 0 0 300
5 IO 5
6 JR PREC 1.0
7 PG 1 1
8 IN 6
9 PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
10 PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
11 PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
12 PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
13 PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
14 PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
15 IN 3
16 KK DRAINAGE. AREA
17 KO 0 21
18 KM DRAINAGE
19 BA 0.057
20 PR 1
21 LS 0 88
22 UD 0.05
23 KK SPILLWAY ROUTIN G
24 KM ROCK DAM SP ILLWAY 1' WIDE
25 KO 1
26 RS 1 ELEV 694
27 SV 0 0.17 0.7
28 SE 694 696 698
29 SG 0 0.07 0.14 0.21 0.28
30 SE 694 694.5 695 695.5 696
31 ST 698 100 3 1.5
32 22
PAGE 1
* *
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* BY THE COE IN FEBRUARY 1981
* REVISED 02 AUG 88
* RUN DATE 10/21/1997 TIME 21:21:43
*
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION BASIN
WK DICKSON
5 IO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
JP MULTI-PLAN OPTION
NPLAN
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECOND
ACRE-FEET
ACRES
DEGREES FAHRENHEIT
1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
#2
* *
* DODSON AND ASSOCIATES, INC.
* HYDROLOGIST AND CIVIL ENGINEERS
* 7015 W TIDWELL SUITE 107
* HOUSTON, TEXAS 77092
* [phone]
*

**************
* *
16 KK * DRAINA * GE AREA
* *
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
[PLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS

* *
23 KK * SPILL *
* * WAY ROUTING

25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTI NG DATA
26 RS STORAGE ROUTIN G
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 694.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 .2 .7
28 SE ELEVATION 694.00 696.00 698.00
29 SQ DISCHARGE 0. 0. 0. 0. 0.
30 SE ELEVATION 694.00 694.50 695.00 695.50 696.00
31 ST TOP OF DAM
TOPEL 698.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COQD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
***
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .04 .09 .13 .17 .70
OUTFLOW .00 .07 .14 .21 .28 .56
ELEVATION 694.00 694.50 695.00 695.50 696.00 698.00
HYDROGRAPH AT STATION SPILL
PLAN 1, RATIO = 1.00

DA MON HRMN ORD OUTFLOW STORAGE STAGE * DA MON HRMN ORD OUTFLOW STORAGE STAGE * DA MON HRMN ORD OUTFLOW STORAGE STAGE
1 0000 1 0. .0 694.0 * 1 2000 101 0. .2 696.1 * 2 1600 201 0. .0 694.2
1 0012 2 0. .0 694.0 * 1 2012 102 0. .2 696.1 * 2 1612 202 0. .0 694.2
1 0024 3 0. .0 694.0 * 1 2024 103 0. .2 696.1 * 2 1624 203 0. .0 694.2
1 0036 4 0. .0 694.0 * 1 2036 104 0. .2 696.0 * 2 1636 204 0. .0 694.2
1 0048 5 0. .0 694.0 * 1 2048 105 0. .2 696.0 * 2 1648 205 0. .0 694.2
1 0100 6 0. .0 694.0 * 1 2100 106 0. .2 696.0 * 2 1700 206 0. .0 694.2
1 0112 7 0. .0 694.0 * 1 2112 107 0. .2 696.0 * 2 1712 207 0. .0 694.2
1 0124 8 0. .0 694.0 * 1 2124 108 0. .2 696.0 * 2 1724 208 0. .0 694.2
1 0136 9 0. .0 694.0 * 1 2136 109 0. .2 695.9 * 2 1736 209 0. .0 694.2
1 0148 10 0. .0 694.0 * 1 2148 110 0. .2 695.9 * 2 1748 210 0. .0 694.2
1 0200 11 0. .0 694.1 * 1 2200 111 0. .2 695.9 * 2 1800 211 0. .0 694.2
1 0212 12 0. .1 694.6 * 1 2212 112 0. .2 695.9 * 2 1812 212 0. .0 694.2
1 0224 13 0. .1 695.6 * 1 2224 113 0. .2 695.9 * 2 1824 213 0. .0 694.1
1 0236 14 0. .2 696.2 * 1 2236 114 0. .2 695.9 * 2 1836 214 0. .0 694.1
1 0248 15 0. .3 696.4 * 1 2248 115 0. .2 695.8 * 2 1848 215 0. .0 694.1
1 0300 16 0. .3 696.5 * 1 2300 116 0. .2 695.8 * 2 1900 216 0. .0 694.1
1 0312 17 0. .3 696.7 * 1 2312 117 0. .2 695.8 * 2 1912 217 0. .0 694.1
1 0324 18 0. .4 696.8 * 1 2324 118 0. .2 695.8 * 2 1924 218 0. .0 694.1
1 0336 19 0. .4 697.0 * 1 2336 119 0. .1 695.7 * 2 1936 219 0. .0 694.1
1 0348 20 0. .5 697.1 * 1 2348 120 0. .1 695.7 * 2 1948 220 0. .0 694.1
1 0400 21 0. .5 697.2 * 2 0000 121 0. .1 695.7 * 2 2000 221 0. .0 694.1
1 0412 22 0. .5 697.3 * 2 0012 122 0. .1 695.7 * 2 2012 222 0. .0 694.1
1 0424 23 0. .5 697.4 * 2 0024 123 0. .1 695.6 * 2 2024 223 0. .0 694.1
1 0436 24 0. .6 697.5 * 2 0036 124 0. .1 695.6 * 2 2036 224 0. .0 694.1
1 0448 25 0. .6 697.6 * 2 0048 125 0. .1 695.6 * 2 2048 225 0. .0 694.1
1 0500 26 1. .6 697.6 * 2 0100 126 0. .1 695.6 * 2 2100 226 0. .0 694.1
1 0512 27 1. .6 697.6 * 2 0112 127 0. .1 695.5 * 2 2112 227 0. .0 694.1
1 0524 28 1. .6 697.7 * 2 0124 128 0. .1 695.5 * 2 2124 228 0. .0 694.1
1 0536 29 1. .6 697.7 * 2 0136 129 0. .1 695.5 * 2 2136 229 0. .0 694.1
1 0548 30 1. .6 697.7 * 2 0148 130 0. .1 695.4 * 2 2148 230 0. .0 694.1
1 0600 31 1. .6 697.7 * 2 0200 131 0. .1 695.4 * 2 2200 231 0. .0 694.1
1 0612 32 1. .6 697.7 * 2 0212 132 0. .1 695.3 * 2 2212 232 0. .0 694.1
1 0624 33 1. .6 697.7 * 2 0224 133 0. .1 695.3 * 2 2224 233 0. .0 694.1
1 0636 34 1. .6 697.7 * 2 0236 134 0. .1 695.3 * 2 2236 234 0. .0 694.1
1 0648 35 1. .6 697.6 * 2 0248 135 0. .1 695.2 * 2 2248 235 0. .0 694.1
1 0700 36 1. .6 697.6 * 2 0300 136 0. .1 695.2 * 2 2300 236 0. .0 694.1
1 0712 37 1. .6 697.6 * 2 0312 137 0. .1 695.2 * 2 2312 237 0. .0 694.1
1 0724 38 1. .6 697.6 * 2 0324 138 0. .1 695.1 * 2 2324 238 0. .0 694.1
1 0736 39 1. .6 697.6 * 2 0336 139 0. .1 695.1 * 2 2336 239 0. .0 694.1
1 0748 40 0. .6 697.6 * 2 0348 140 0. .1 695.1 * 2 2348 240 0. .0 694.1
1 0800 41 0. .6 697.5 * 2 0400 141 0. .1 695.0 * 3 0000 241 0. .0 694.1
1 0812 42 0. .6 697.5 * 2 0412 142 0. .1 695.0 * 3 0012 242 0. .0 694.1
1 0824 43 0. .6 697.5 * 2 0424 143 0. .1 695.0 * 3 0024 243 0. .0 694.1
1 0836 44 0. .6 697.4 * 2 0436 144 0. .1 695.0 * 3 0036 244 0. .0 694.1
1 0848 45 0. .5 697.4 * 2 0448 145 0. .1 694.9 * 3 0048 245 0. .0 694.1
1 0900 46 0. .5 697.4 * 2 0500 146 0. .1 694.9 * 3 0100 246 0. .0 694.1
1 0912 47 0. .5 697.3 * 2 0512 147 0. .1 694.9 * 3 0112 247 0. .0 694.1
1 0924 48 0. .5 697.3 * 2 0524 148 0. .1 694.9 * 3 0124 248 0. .0 694.1
1 0936 49 0. .5 697.3 * 2 0536 149 0. .1 694.8 * 3 0136 249 0. .0 694.1
1 0948 50 0. .5 697.3 * 2 0548 150 0. .1 694.8 * 3 0148 250 0. .0 694.1
1 1000 51 0. .5 697.2 * 2 0600 151 0. .1 694.8 * 3 0200 251 0. .0 694.1
1 1012 52 0. .5 697.2 * 2 0612 152 0. .1 694.8 * 3 0212 252 0. .0 694.1
1 1024 53 0. .5 697.2 * 2 0624 153 0. .1 694.8 * 3 0224 253 0. .0 694.0
1 1036 54 0. .5 697.2 * 2 0636 154 0. .1 694.7 * 3 0236 254 0. .0 694.0
1 1048 55 0. .5 697.1 * 2 0648 155 0. .1 694.7 * 3 0248 255 0. .0 694.0
1 1100 56 0. .5 697.1 * 2 0700 156 0. .1 694.7 * 3 0300 256 0. .0 694.0
1 1112 57 0. .5 697.1 * 2 0712 157 0. .1 694.7 * 3 0312 257 0. .0 694.0
1 1124 58 0. .4 697.0 * 2 0724 158 0. .1 694.7 * 3 0324 258 0. .0 694.0
1 1136 59 0. .4 697.0 * 2 0736 159 0. .1 694.6 * 3 0336 259 0. .0 694.0
1 1148 60 0. .4 697.0 * 2 0748 160 0. .1 694.6 * 3 0348 260 0. .0 694.0
1 1200 61 0. .4 697.0 * 2 0800 161 0. .1 694.6 * 3 0400 261 0. .0 694.0
1 1212 62 0. .4 696.9 * 2 0812 162 0. .1 694.6 * 3 0412 262 0. .0 694.0
1 1224 63 0. .4 696.9 * 2 0824 163 0. .0 694.6 * 3 0424 263 0. .0 694.0
1 1236 64 0. .4 696.9 * 2 0836 164 0. .0 694.6 * 3 0436 264 0. .0 694.0
1 1248 65 0. .4 696.9 * 2 0848 165 0. .0 694.5 * 3 0448 265 0. .0 694.0
1 1300 66 0. .4 696.8 * 2 0900 166 0. .0 694.5 * 3 0500 266 0. .0 694.0
1 1312 67 0. .4 696.8 * 2 0912 167 0. .0 694.5 * 3 0512 267 0. .0 694.0
1 1324 68 0. .4 696.8 * 2 0924 168 0. .0 694.5 * 3 0524 268 0. .0 694.0
1 1336 69 0. .4 696.8 * 2 0936 169 0. .0 694.5 * 3 0536 269 0. .0 694.0
1 1348 70 0. .4 696.7 * 2 0948 170 0. .0 694.5 * 3 0548 270 0. .0 694.0
1 1400 71 0. .4 696.7 * 2 1000 171 0. .0 694.5 * 3 0600 271 0. .0 694.0
1 1412 72 0. .4 696.7 * 2 1012 172 0. .0 694.5 * 3 0612 272 0. .0 694.0
1 1424 73 0. .3 696.7 * 2 1024 173 0. .0 694.4 * 3 0624 273 0. .0 694.0
1 1436 74 0. .3 696.6 * 2 1036 174 0. .0 694.4 * 3 0636 274 0. .0 694.0
1 1448 75 0. .3 696.6 * 2 1048 175 0. .0 694.4 * 3 0648 275 0. .0 694.0
1 1500 76 0. .3 696.6 * 2 1100 176 0. .0 694.4 * 3 0700 276 0. .0 694.0
1 1512 77 0. .3 696.6 * 2 1112 177 0. .0 694.4 * 3 0712 277 0. .0 694.0
1 1524 78 0. .3 696.6 * 2 1124 178 0. .0 694.4 * 3 0724 278 0. .0 694.0
1 1536 79 0. .3 696.5 * 2 1136 179 0. .0 694.4 * 3 0736 279 0. .0 694.0
1 1548 80 0. .3 696.5 * 2 1148 180 0. .0 694.4 * 3 0748 280 0. .0 694.0
1 1600 81 0. .3 696.5 * 2 1200 181 0. .0 694.4 * 3 0800 281 0. .0 694.0
1 1612 82 0. .3 696.5 * 2 1212 182 0. .0 694.3 * 3 0812 282 0. .0 694.0
1 1624 83 0. .3 696.4 * 2 1224 183 0. .0 694.3 * 3 0824 283 0. .0 694.0
1 1636 84 0. .3 696.4 * 2 1236 184 0. .0 694.3 * 3 0836 284 0. .0 694.0
1 1648 85 0. .3 696.4 * 2 1248 185 0. .0 694.3 * 3 0848 285 0. .0 694.0
1 1700 86 0. .3 696.4 * 2 1300 186 0. .0 694.3 * 3 0900 286 0. .0 694.0
1 1712 87 0. .3 696.4 * 2 1312 187 0. .0 694.3 * 3 0912 287 0. .0 694.0
1 1724 88 0. .3 696.3 * 2 1324 188 0. .0 694.3 * 3 0924 288 0. .0 694.0
1 1736 89 0. .3 696.3 * 2 1336 189 0. .0 694.3 * 3 0936 289 0. .0 694.0
1 1748 90 0. .2 696.3 * 2 1348 190 0. .0 694.3 * 3 0948 290 0. .0 694.0
1 1800 91 0. .2 696.3 * 2 1400 191 0. .0 694.3 * 3 1000 291 0. .0 694.0
1 1812 92 0. .2 696.3 * 2 1412 192 0. .0 694.3 * 3 1012 292 0. .0 694.0
1 1824 93 0. .2 696.2 * 2 1424 193 0. .0 694.3 * 3 1024 293 0. .0 694.0
1 1836 94 0. .2 696.2 * 2 1436 194 0. .0 694.2 * 3 1036 294 0. .0 694.0
1 1848 95 0. .2 696.2 * 2 1448 195 0. .0 694.2 * 3 1048 295 0. .0 694.0
1 1900 96 0. .2 696.2 * 2 1500 196 0. .0 694.2 * 3 1100 296 0. .0 694.0
1 1912 97 0. .2 696.2 * 2 1512 197 0. .0 694.2 * 3 1112 297 0. .0 694.0
1 1924 98 0. .2 696.1 * 2 1524 198 0. .0 694.2 * 3 1124 298 0. .0 694.0
1 1936 99 0. .2 696.1 * 2 1536 199 0. .0 694.2 * 3 1136 299 0. .0 694.0
1 1948 100 0. .2 696.1 *
* 2 1548 200 0. .0 694.2 * 3 1148 300 0. .0 694.0

PEAK OUTFLOW IS 1. AT TIME 5.60 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(C FS) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.60 (CFS) 0. 0. 0. 0.
(INCHES) .080 .239 .276 .276
(AC-FT) 0. 1. 1. 1.
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC -FT) (HR) 6-HR 24-HR 72-HR 59.80-HR
1. 5.60 1. 0. 0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(F EET) (HR) 6-HR 24-HR 72-HR 59.80-HR
69 7.71 5.60 697.52 696.62 695.21 695.21
CUMULATIVE AREA = .06 SQ MI
PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO 1
1.00
HYDROGRAPH AT DRAINA .06 1 FLOW 6.
TIME 2.40
ROUTED TO SPILL .06 1 FLOW 1.
TIME 5.60
** PEAK STAGES IN FEET **
1 STAGE 697.71
TIME 5.60

SUMMARY OF DAM OVERTOPPING/BREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 694.00 698.00 698.00
STORAGE 0. 1. 1.
OUTFLOW 0. 1. 1.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 697.71 .00 1. 1. .00 5.60 .00
*** NORMAL END OF HEC-1 ***

C-0 , to
T? : 5 mI'n . ?? tom. 05 hrs.
EA"Ev. Ara- (A.) A\1 (A--4+) V (Ac 4+)
__ boo -- v.0 3 0
C7.lov

5lz\/ . cam. CcE )
loo v
101 0.14
lo2• o,Zt3
HEC•1 INPUT
PAGE 1
LINE ID.......1.......2.......3.......4....... 5.......6.......7.......8.......9......10
ID UNIVERSITY EAST BUSINESS PARK
ID WETLAND DETENTION EVALUATION BASIN #3
ID WK DIC ON
IT 12 0 0 300
10 5
JR PREC 1.0
PG 1 1
IN 6
PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
PC 0.745 0.762 0772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
IN 3
16 KK DRAINAGE AREA
17 KO 0 21
18 KM DRAINAGE
19 BA 0.007
20 : PR 1
21 LS 0 88
22 UD 0.05
23 KK SPILLWAY ROUTING
24 KM ROCK DAM SPILLWAY 1' WIDE
25 KO 1
26 RS 1 ELEV 700
27 SV 0 0.60
28 SE 700 702
29 SO 0 0.14 0.28
30 SE 700 701 702
31 ST 702 100 3 1.5
32 ZZ
............. ................... .......................................
' FLOOD HYDROGRAPH PACKAGE (HEC-1) DODSON AND ASSOCIATES, INC.
BY THE COE IN FEBRUARY 1981 HYDROLOGIST AND CIVIL ENGINEERS
REVISED 02 AUG 88 7015 W TIDWELL SUITE 107
HOUSTON, TEXAS 77092
RUN DATE 10124/1997 TIME 11:04:53 [phone] '
..,.,......
..,« .................................... ...... ......................
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION BASIN #3
WK DIC ON
510 OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NO 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
16 KK DRAINA ' GE AREA
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS
23 KK SPILL ' WAY ROUTING
25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTING DATA
26 RS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDMON
RSVRIC 700.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 .6
28 SE ELEVATION 700.00 702.00
29 SO DISCHARGE 0. 0. 0.
30 SE ELEVATION 700.00 701.00 702.00
31 ST TOP OF DAM
TOPEL 702.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COQD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .30 .60
OUTFLOW .00 .14 .28
ELEVATION 700.00 701.00 702.00
..................................................................................................................................
HYDROGRAPH AT STATION SPILL
PLAN 1, RATIO= 1.00
................ ........... .......... ............... .............. ........ ........ ..-...............
..................,.,..,.....
DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE
1 0000 1 0. .0 700.0 ' 1 2000101 0. .0 700.2 ' 2 1600 201 0. .0 700.1
1 0012 2 0. .0 700.0 ' 1 2012102 0. .0 700.2 ' 2 1612 202 0. .0 700.1
1 0024 3 0. .0 700.0 ' 1 2024103 0. .0 700.2 ' 2 1624 203 0. .0 700.1
1 0036 4 0. .0 700.0 ' 1 2036104 0. .0 700.2 ' 2 1636 204 0. .0 700.1
1 0048 5 0. .0 700.0 ' 1 2048105 0. .0 700.2 ' 2 1648 205 0. .0 700.1
1 0100 6 0. .0 700.0 ' 1 2100106 0. .0 700.2 ' 2 1700 206 0. .0 700.1
1 0112 7 0. .0 700.0 ' 1 2112107 0. .0 700.2 ' 2 1712 207 0. .0 700.1
1 0124 8 0. .0 700.0 ' 1 2124108 0. .0 700.2 ' 2 1724 208 0. .0 700.1
1 0136 9 0. .0 700.0 ' 1 2136109 0. .0 700.2 ' 2 1736 209 0. .0 700.1
1 0148 10 0. .0 700.0 ' 1 2148 110 0. .0 700.2 ' 2 1748 210 0. .0 700.1
1 0200 11 0. .0 700.0 ' 1 2200 111 0. .0 700.2 ' 2 1800 211 0. .0 700.1
1 0212 12 0. .0 700.0 ' 1 2212112 0. .0 700.2 ' 2 1812 212 0. .0 700.1
1 0224 13 0. .0 700.1 ' 1 2224113 0. .0 700.2 ' 2 1824 213 0. .0 700.1
1 0236 14 0. .0 700.1 ' 1 2236114 0. .0 700.2 ' 2 1836 214 0. .0 700.1
1 0248 15 0. .0 700.1 ' 1 2248115 0. .0 700.1 ' 2 1848 215 0. .0 700.1
1 0300 16 0. .0 700.1 ' 1 2300116 0. .0 700.1 ' 2 1900 216 0. .0 700.1
1 0312 17 0. .0 700.1 ' 1 2312117 0. .0 700.1 ' 2 1912 217 0. .0 700.1
1 0324 18 0. .1 700.2 ' 1 2324118 0. .0 700.1 ' 2 1924 218 0. .0 700.1
1 0336 19 0. .1 700.2 ' 1 2336119 0. .0 700.1 ' 2 1936 219 0. .0 700.1
1 0348 20 0. 1 700.2 ' 1 2348 120 0. .0 700.1 ' 2 1948 220 0. .0 700.1
1 0400 21 0. 1 700.2 ' 2 0000121 0. .0 700.1 ' 2 2000 221 0. .0 700.1
1 0412 22 0. .1 700.2 ' 2 0012122 0. .0 700.1 ' 2 2012 222 0. .0 700.1
1 0424 23 0. .1 700.2 ' 2 0024123 0. .0 700.1 ' 2 2024 223 0. .0 700.1
1 0436 24 0. .1 700.2 ' 2 0036 124 0. .0 700.1 ' 2 2036 224 0. .0 700:1
1 0448 25 0. .1 700.3 ' 2 0048 125 0. .0 700.1 ' 2 2048 225 0. .0 700.1
1 0500 26 0. .1 700.3 ' 2 0100 126 0. .0 700.1 ' 2 2100 226 0. .0 700.1
1 0512 27 0. .1 700.3 ' 2 0112127 0. .0 700.1 ' 2 2112 227 0. .0 700.1
1 0524 28 0. .1 700.3 ' 2 0124128 0. .0 700.1 ' 2 2124 228 0. .0 700.1
1 0536 29 0. .1 700.3 ' 2 0136129 0. .0 700.1 ' 2 2136 229 0. .0 700.1
1 0548 30 0. .1 700.3 2 0148130 0. .0 700.1 ' 2 2148 230 0. .0 700.1
1 0600 31 0. 1 700.3 ' 2 0200131 0. .0 700.1 ' 2 2200 231 0. .0 700.1
1 0612 32 0. 1 700.3 ' 2 0212132 0. .0 700.1 ' 2 2212 232 0. .0 700.1
1 0624 33 0. 1 700.3 ' 2 0224133 0. .0 700.1 ' 2 2224 233 0. .0 700.1
1 0636 34 0. .1 700.3 ' 2 0236134 0. .0 700.1 ' 2 2236 234 0. .0 700.1
1 0648 35 0. .1 700.3 ' 2 0248135 0. .0 700.1 ' 2 2248 235 0. .0 700.1
1 0700 36 0. .1 700.3 2 0300136 0. .0 700.1 • 2 2300236 0. .0 700.1
1 0712 37 0. .1 700.3 ' 2 0312 137 0. .0 700.1 ' 2 2312 237 0. .0 700.1
1 0724 38 0. .1 700.3 ' 2 0324138 0. .0 700.1 ' 2 2324 238 0. .0 700.1
1 0736 39 0. .1 700.3 ' 2 0336139 0. .0 700.1 ' 2 2336 239 0. .0 700.1
1 0748 40 0. .1 700.3 ' 2 0348 140 0. .0 700.1 ' 2 2348 240 0. .0 700.1
1 0800 41 0. .1 700.3 ' 2 0400141 0. .0 700.1 ' 3 0000 241 0. .0 700.1
1 0812 42 0. .1 700.3 ' 2 0412142 0. .0 700.1 ' 3 0012 242 0. .0 700.1
1 0824 43 0. .1 700.3 ' 2 0424143 0. .0 700.1 ' 3 0024 243 0. .0 700.1
1 0836 44 0. .1 700.3 ' 2 0436 144 0. .0 700.1 ' 3 0036 244 0. .0 700.1
1 0848 45 0. .1 700.3 ' 2 0448 145 0. .0 700.1 ' 3 0048 245 0. .0 700.1
1 0900 46 0. .1 700.3 ' 2 0500 146 0. .0 700.1 ' 3 0100 246 0. .0 700.1
1 0912 47 0. .1 700.3 ' 2 0512 147 0. .0 700.1 ' 3 0112 247 0. .0 700.1
1 0924 48 0. .1 700.3 ' 2 0524 148 0. .0 700.1 ' 3 0124 248 0. .0 700.1
1 0936 49 0. .1 700.2 ' 2 0536 149 0. .0 700.1 ' 3 0136 249 0. .0 700.1
1 0948 50 0. .1 700.2 ' 2 0548 150 0. .0 700.1 ' 3 0148 250 0. .0 700.1
1 1000 51 0. .1 700.2 ' 2 0600151 0. .0 700.1 ' 3 0200 251 0. .0 700.1
1 1012 52 0. .1 700.2 ' 2 0612152 0. .0 700.1 ' 3 0212 252 0. .0 700.1
1 1024 53 0. .1 700.2 ' 2 0624153 0. .0 700.1 ' 3 0224 253 0. .0 700.1
1 1036 54 0. .1 700.2 ' 2 0636 154 0. .0 700.1 ' 3 0236 254 0. .0 700.1
1 1048 55 0. .1 700.2 ' 2 0648 155 0. .0 700.1 ' 3 0248 255 0. .0 700.1
1 1100 56 0. .1 700.2 ' 2 0700 156 0. .0 700.1 ' 3 0300 256 0. .0 700.1
1 1112 57 0. .1 700.2 ' 2 0712157 0. .0 700.1 ' 3 0312 257 0. .0 700.0
1 1124 58 0. .1 700.2 ' 2 0724158 0. .0 700.1 ' 3 0324 258 0. .0 700.0
1 1136 59 0. .1 700.2 ' 2 0736 159 0. .0 700.1 ' 3 0336 259 0. .0 700.0
1 1148 60 0. .1 700.2 ' 2 0748 160 0. .0 700.1 ' 3 0348 260 0. .0 700.0
1 1200 61 0. .1 700.2 ' 2 0800 161 0. .0 700.1 ' 3 0400 261 0. .0 700.0
1 1212 62 0. .1 700.2 ' 2 0812 162 0. .0 700.1 ' 3 0412 262 0. .0 700.0
1 1224 63 0. .1 700.2 ' 2 0824163 0. .0 700.1 ' 3 0424 263 0. .0 700.0
1 1236 64 0. .1 700.2 ' 2 0836 164 0. .0 700.1 ' 3 0436 264 0. .0 700.0
1 1248 65 0. .1 700.2 2 0848 165 0. .0 700.1 ' 3 0448 265 0. .0 700.0
1 1300 66 0. 1 700.2 2 0900166 0. .0 700.1 3 0500266 0. .0 700.0
1 1312 67 0. 1 700.2 ' 2 0912167 0. .0 700.1 ' 3 0512 267 0. .0 700.0
1 1324 68 0. 1 700.2 ' 2 0924 168 0. .0 700.1 ' 3 0524 268 0. .0 700.0
1 1336 69 0. 1 700.2 ' 2 0936 169 0. .0 700.1 ' 3 0536 269 0. .0 700.0
1 1348 70 0. .1 700.2 ' 2 0948 170 0. .0 700.1 ' 3 0548 270 0. .0 700.0
1 1400 71 0. .1 700.2 ' 2 1000 171 0. .0 700.1 ' 3 0600 271 0. .0 700.0
1 1412 72 0. .1 700.2 ' 2 1012172 0. .0 700.1 ' 3 0612 272 0. .0 700.0
1 1424 73 0. .1 700.2 ' 2 1024173 0. .0 700.1 ' 3 0624 273 0. .0 700.0
1 1436 74 0. .1 700.2 ' 2 1036 174 0. .0 700.1 ' 3 0636 274 0. .0 700.0
1 1448 75 0. .1 700.2 ' 2 1048 175 0. .0 700.1 ' 3 0648 275 0. .0 700.0
1 1500 76 0. .1 700.2 ' 2 1100176 0. .0 700.1 " 3 0700 276 0. .0 700.0
1 1512 77 0. .1 700.2 ' 2 1112177 0. .0 700.1 ' 3 0712 277 0. .0 700.0
1 1524 78 0. .1 700.2 2 1124178 0. .0 700.1 ' 3 0724 278 0. .0 700.0
1 1536 79 0. .1 700.2 ' 2 1136179 0. .0 700.1 ' 3 0736 279 0. .0 700.0
1 1548 80 0. .1 700.2 2 1148180 0. .0 700.1 ' 3 0748 280 0. .0 700.0
1 1600 81 0. .1 700.2 ' 2 1200181 0. .0 700.1 ' 3 0800 281 0. .0 700.0
1 1612 82 0. .1 700.2 ' 2 1212182 0. .0 700.1 ' 3 0812 282 0. .0 700.0
1 1624 83 0. .1 700.2' 2 1224183 0. .0 700.1 ' 3 0824 283 0. .0 700.0
1 1636 84 0. .1 700.2 ' 2 1236184 0. .0 700.1 ' 3 0836 284 0. .0 700.0
1 1648 85 0. .1 700.2 ' 2 1248 185 0. .0 700.1 ' 3 0848 285 0. .0 700.0
1 1700 86 0. .1 700.2 ' 2 1300186 0. .0 700.1 ' 3 0900 286 0. .0 700.0
1 1712 87 0. .1 700.2 ' 2 1312 187 0. .0 700.1 ' 3 0912 287 0. .0 700.0
1 1724 88 0. .1 700.2 ' 2 1324188 0. .0 700.1 ' 3 0924 288 0. .0 700.0
1 1736 89 0. .1 700.2- 2 1336 189 0. .0 700.1 ' 3 0936 289 0. .0 700.0
1 1748 90 0. .1 700.2 ' 2 1348 190 0. .0 700.1 ' 3 0948 290 0. .0 700.0
1 1800 91 0. .1 700.2 ' 2 1400191 0. .0 700.1 ' 3 1000 291 0. .0 700.0
1 1812 92 0. .1 700.2 ' 2 1412192 0. .0 700.1 ' 3 1012 292 0. .0 700.0
1 1824 93 0. 1 700.2 ' 2 1424193 0. .0 700.1 ' 3 1024 293 0. .0 700.0
1 1836 94 0. 1 700.2 ' 2 1436194 0. .0 700.1 ' 3 1036 294 0. .0 700.0
1 1848 95 0. 1 700.2 ' 2 1448 195 0. .0 700.1 ' 3 1048 295 0. .0 700.0
1 1900 96 0. 1 700.2 ' 2 1500196 0. .0 700.1 ' 3 1100 296 0. .0 700.0
1 1912 97 0. .1 700.2 ' 2 1512197 0. .0 700.1 ' 3 1112 297 0. .0 700.0
1 1924 98 0. .1 700.2 ' 2 1524198 0. .0 700.1 ' 3 1124 298 0. .0 700.0
1 1936 99 0. .1 700.2 ' 2 1536 199 0. .0 700.1 ' 3 1136 299 0. .0 700.0
1
..... 1948 100
............... 0.
....... .1
..... 700.2 ' 2
............... 1548 200
............... 0.
....... .0 700.1 ' 3
.................... 1148 300
............... 0.
........ .0 700.0
............»..,..
PEAK OUTFLOW IS 0. AT TIME 5.60 HOURS
PEAK FLOW TIME MAXIMUM AVERAGE FLOW
(CFS) (HR) 6-HR 24-HR 72-HR 59.80-HR
0. 5.40 (CFS) 0. 0. 0. 0.
(INCHES) .049 .149 .224 .224
(AC-FT) 0. 0. 0. 0.
PEAK STORAGE TIME MAXIMUM AVERAGE STORAGE
(AC-FT) (HR) 6-HR 24-HR 72-HR 59.80-HR
0. 5.60 0. 0 . 0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
700.29 5.60 700.26 700.20 700.12 700.12
CUMULAT IVE AREA= .01 SO MI
PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO 1
1.00
HYDROGRAPH AT DRAINA .01 1 FLOW 1.
TIME 2.40
ROUTED TO SPILL .01 1 FLOW 0.
TIME 5.40
PEAK STAGES IN FEET "
1 STAGE 70029
TIME 5.60

SUMMARY OF DAM OVERTOPPINGBREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE SPILLWAY CREST TOP OF DAM
ELEVATION 700.00 702.00 702.00
STORAGE 0. 1. 1.
OUTFLOW 0. 0. 0.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVERTOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 700.29 .00 0. 0. .00 5.60 .00
"' NORMAL END OF HEC-1 "'
-- -- --.__-._-boo-- -
0.0
0.5a
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HEC•1 INPUT
PAGE 1
LINE ID....... 1....... 2....... 3.......4....... 5.......6....... 7.......8....... 9......10
1 ID UNIVERSITY EAST BUSINESS PARK
2 ID WETLAND DETENTION EVALUATION BASIN #4
3 ID WK DIC ON
4 IT 12 0 0 300
5 10 5
6 JR PREC 1.0
7 PG 1 1
8 IN 6
9 PC 0.000 0.009 0.018 0.020 0.026 0.035 0.045 0.054 0.063 0.072
10 PC 0.082 0.100 0.109 0.126 0.137 0.159 0.181 0.204 0.238 0.292
11 PC 0.366 0.447 0.520 0.593 0.625 0.652 0.673 0.691 0.709 0.727
12 PC 0.745 0.762 0.772 0.799 0.816 0.827 0.836 0.845 0.859 0.874
13 PC 0.883 0.892 0.901 0.910 0.919 0.928 0.937 0.946 0.954 0.960
14 PC 0.966 0.973 0.982 0.991 1.000 1.000 1.000 1.000 1.000 1.000
15 IN 3
16 KK DRAINAGE AREA
17 KO 0 21
18 KM DRAINAGE
19 BA 0.006
20 PR 1
21 LS 0 88
22 LID 0.05
23 KK SPILLWAY ROUTING
24 KM ROCK DAM SPILLWAY 1' WIDE
25 KO 1
26 RS 1 ELEV 700
27 SV 0 0.08 0.58
28 SE 698 700 702
29 SO 0 0.07 0.43
30 SE 698 700 702
31 ST 702 100 3 1.5
32 ZZ
........................................ .......................................
FLOOD HYDROGRAPH PACKAGE (HEC-1) DODSON AND ASSOCIATES, INC. '
BY THE COE IN FEBRUARY 1981 HYDROLOGIST AND CIVIL ENGINEERS
REVISED 02 AUG 88 70 15 W TIDWELL SUITE 107
' HOUSTON, TEXAS 77092 '
RUN DATE 1 0124/1 99 7 TIME 14:10:38 [phone]
......................................... .... ..,............. ....,..............
UNIVERSITY EAST BUSINESS PARK
WETLAND DETENTION EVALUATION BASIN #4
WK DIC ON
510 OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 12 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 300 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 3 0 ENDING DATE
NDTIME 1148 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .20 HOURS
TOTAL TIME BASE 59.80 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW : CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
JP MULTI-PLAN OPTION
NPLAN 1 NUMBER OF PLANS
JR MULTI-RATIO OPTION
RATIOS OF PRECIPITATION
1.00
16 KK DRAINA ' GE AREA
17 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
OSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
TOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 300 LAST ORDINATE PUNCHED OR SAVED
TIMINT .200 TIME INTERVAL IN HOURS
23 KK SPILL ' WAY ROUTING
25 KO OUTPUT CONTROL VARIABLES
IPRNT 1 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
HYDROGRAPH ROUTING DATA
26 RS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 700.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
27 SV STORAGE .0 .1 .6
28 SE ELEVATION 698.00 700.00 702.00
29 SO DISCHARGE 0. 0. 0.
30 SE ELEVATION 698.00 700.00 702.00
31 ST TOP OF DAM
TOPEL 702.00 ELEVATION AT TOP OF DAM
DAMWID 100.00 DAM WIDTH
COOD 3.00 WEIR COEFFICIENT
EXPD 1.50 EXPONENT OF HEAD
COMPUTED STORAGE-OUTFLOW-ELEVATION DATA
(INCLUDING FLOW OVER DAM)
STORAGE .00 .08 .58
OUTFLOW .00 .07 .43
ELEVATION 698.00 700.00 702.00
................«........ ,.,....,.,....... ,,................ ......,......... ,.......... »......,..,...........,..................
HYDROGRAPH AT STATION SPILL
PLAN 1, RATIO= 1.00
.............................................................................»..,..,............,...,..........,.»....,........,.
DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE' DA MON HRMN ORD OUTFLOW STORAGE STAGE
1 0000 1 0. .1 700.0 ' 1 2000101 0. .1 699.8 ' 2 1600 201 0. .0 698.5
1 0012 2 0. .1 700.0 ' 1 2012102 0. .1 699.8 ' 2 1612 202 0. .0 698.5
1 0024 3 0. .1 700.0 ' 1 2024103 0. .1 699.8 ' 2 1624 203 0. .0 698.5
1 0036 4 0. .1 700.0 ' 1 2036104 0. .1 699.8 ' 2 1636 204 0. .0 698.5
1 0048 5 0. .1 700.0 ' 1 2048105 0. .1 699.8 ' 2 1648 205 0. .0 698.5
1 0100 6 0. .1 700.0 ' 1 2100106 0. .1 699.7 ' 2 1700 206 0. .0 698.5
1 0112 7 0. .1 700.0 ' 1 2112107 0. .1 699.7 ' 2 1712 207 0. .0 698.5
1 0124 8 0. .1 700.0 ' 1 2124108 0. .1 699.7 ' 2 1724 208 0. .0 698.5
1 0136 9 0. .1 700.0 ' 1 2136109 0. .1 699.7 ' 2 1736 209 0. .0 698.5
1 0148 10 0. .1 700.0 ' 1 2148110 0. .1 699.7 ' 2 1748 210 0. .0 698.5
1 0200 11 0. .1 700.0 ' 1 2200111 0. .1 699.7 ' 2 1800 211 0. .0 698.5
1 0212 12 0. .1 700.0 ' 1 2212 112 0. .1 699.7 ' 2 1812 212 0. .0 698.5
1 0224 13 0. .1 700.0 ' 1 2224 113 0. .1 699.7 ' 2 1824 213 0. .0 698.5
1 0236 14 0. .1 700.0 ' 1 2236 114 0. .1 699.7 ' 2 1836 214 0. .0 698.5
1 0248 15 0. .1 700.1 ' 1 2248 115 0. .1 699.7 ' 2 1848 215 0. .0 698.4
1 0300 16 0. .1 700.1 ' 1 2300116 0. .1 699.7 ' 2 1900 216 0. .0 698.4
1 0312 17 0. .1 700.1 ' 1 2312117 0. .1 699.7 ' 2 1912 217 0. .0 698.4
1 0324 18 0. .1 700.1 ' 1 2324 118 0. .1 699.7 ' 2 1924 218 0. .0 698.4
1 0336 19 0. .1 700.1 ' 1 2336 119 0. .1 699.6 ' 2 1936 219 0. .0 698.4
1 0348 20 0. .1 700.1 ' 1 2348 120 0. .1 699.6 ' 2 1948 220 0. .0 698.4
1 0400 21 0. .1 700.1 ' 2 0000 121 0. .1 699.6 ' 2 2000 221 0. .0 698.4
1 0412 22 0. .1 700.1 ' 2 0012122 0. .1 699.6 ' 2 2012 222 0. .0 698.4
1 0424 23 0. .1 700.1 ' 2 0024 123 0. .1 699.6 ' 2 2024 223 0. .0 698.4
1 0436 24 0. .1 700.2 ' 2 0036 124 0. .1 699.6 ' 2 2036 224 0. .0 698.4
1 0448 25 0. .1 700.2 ' 2 0048125 0. .1 699.6 ' 2 2048 225 0. .0 698.4
1 0500 26 0. .1 700.2 ' 2 0100 126 0. .1 699.6 ' 2 2100 226 0. .0 698.4
1 0512 27 0. .1 700.2 ' 2 0112 127 0. .1 699.6 ' 2 2112 227 0. .0 698.4
1 0524 28 0. .1 700.2 ' 2 0124128 0. .1 699.5 ' 2 2124 228 0. .0 698.4
1 0536 29 0. .1 700.2 ' 2 0136 129 0. .1 699.5 ' 2 2136 229 0. .0 698.4
1 0548 30 0. .1 700.2' 2 0148 130 0. .1 699.5 ' 2 2148 230 0. .0 698.4
1 0600 31 0. .1 700.2 ' 2 0200131 0. .1 699.5 ' 2 2200 231 0. .0 698.4
1 0612 32 0. .1 700.2' 2 0212132 0. .1 699.5 ` 2 2212 232 0. .0 698.3
1 0624 33 0. .1 700.1 ' 2 0224133 0. .1 699.5 ' 2 2224 233 0. .0 698.3
1 0636 34 0. .1 700.1 ' 2 0236134 0. .1 699.4 ' 2 2236 234 0. .0 698.3
1 0648 35 0. .1 700.1 ' 2 0248135 0. .1 699.4 ' 2 2248 235 0. .0 698.3
1 0700 36 0. .1 700.1 ' 2 0300136 0. .1 699.4 ' 2 2300 236 0. .0 698.3
1 0712 37 0. .1 700.1 ' 2 0312 137 0. .1 699.4 ' 2 2312 237 0. .0 698.3
1 0724 38 0. .1 700.1 ' 2 0324138 0. .1 699.4 ' 2 2324 238 0. .0 698.3
1 0736 39 0. .1 700.1 ' 2 0336139 0. .1 699.3 ' 2 2336 239 0. .0 698.3
1 0748 40 0. .1 700.1 ' 2 0348140 0. .1 699.3 ' 2 2348 240 0. .0 698.3
1 0800 41 0. .1 700.1 '. 2 0400141 0. .1 699.3 3 0000 241 0. .0 698.3
1 0812 42 0. .1 700.1 ' 2 0412142 0. .1 699.3 ' 3 0012 242 0. .0 698.3
1 0824 43 0. .1 700.1 ' 2 0424143 0. .1 699.3 ' 3 0024 243 0. .0 698.3
1 0836 44 0. .1 700.1 ' 2 0436144 0. .0 6992 ' 3 0036 244 0. .0 698.3
1 0848 45 0. .1 700.1 ' 2 0448145 0. .0 6992 ' 3 0048 245 0. .0 698.3
1 0900 46 0. .1 700.1 ' 2 0500146 0. .0 6992 ' 3 0100 246 0. .0 698.3
1 0912 47 0. .1 700.1 ' 2 0512147 0. .0 699.2 ' 3 0112 247 0. .0 698.3
1 0924 48 0. .1 700.1 ' 2 0524148 0. .0 6992 ' 3 0124 248 0. .0 698.3
1 0936 49 0. .1 700.1 ' 2 0536149 0. .0 699.2 ' 3 0136 249 0. .0 698.3
1 0948 50 0. .1 700.0 ' 2 0548150 0. .0 699.1 ' 3 0148 250 0. .0 698.3
1 1000 51 0. .1 700.0 ' 2 0600151 0. .0 699.1 ' 3 0200 251 0. .0 698.3
1 1012 52 0. .1 700.0 ' 2 0612152 0. .0 699.1 ' 3 0212 252 0. .0 698.3
1 1024 53 0. .1 700.0' 2 0624153 0. .0 699.1 3 0224253 0. .0 698.3
1 1036 54 0. .1 700.0' 2 0636154 0. .0 699.1 ' 3 0236 254 0. .0 698.3
1 1048 55 0. .1 700.0' 2 0648155 0. .0 699.1 ' 3 0248 255 0. .0 6982
1 1100 56 0. .1 700.0 ' 2 0700156 0. .0 699.0 ' 3 0300 256 0. .0 698.2
1 1112 57 0. .1 700.0 ' 2 0712 157 0. .0 699.0 ' 3 0312 257 0. .0 698.2
1 1124 58 0. .1 700.0 ' 2 0724158 0. .0 699.0 ' 3 0324 258 0. .0 698.2
1 1136 59 0. .1 700.0 ' 2 0736 159 0. .0 699.0 ' 3 0336 259 0. .0 698.2
1 1148 60 0. .1 700.0 ' 2 0748 160 0. .0 699.0 ' 3 0348 260 0. .0 698.2
1 1200 61 0. .1 700.0 ' 2 0800 161 0. .0 699.0 ' 3 0400 261 0. .0 698.2
1 1212 62 0. .1 700.0 ' 2 0812 162 0. .0 699.0 ' 3 0412 262 0. .0 698.2
1 1224 63 0. .1 700.0 ' 2 0824163 0. .0 698.9 ' 3 0424 263 0. .0 698.2
1 1236 64 0. .1 700.0 ' 2 0836164 0. .0 698.9 ' 3 0436 264 0. .0 698.2
1 1248 65 0. .1 700.0 ' 2 0848165 0. .0 698.9 ' 3 0448 265 0. .0 698.2
1 1300 66 0. .1 700.0 ' 2 0900166 0. .0 698.9 ' 3 0500 266 0. .0 698.2
1 1312 67 0. .1 700.0 ' 2 0912167 0. .0 698.9 " 3 0512 267 0. .0 698.2
1 1324 68 0. .1 700.0 ' 2 0924168 0. .0 698.9 ' 3 0524 268 0. .0 698.2
1 1336 69 0. .1 700.0 ' 2 0936169 0. .0 698.9 ' 3 0536 269 0. .0 698.2
1 1348 70 0. .1 700.0 ' 2 0948170 0. .0 698.9 ' 3 0548 270 0. .0 698.2
1 1400 71 0. .1 699.9 ' 2 1000171 0. .0 698.8 ' 3 0600 271 0. .0 698.2
1 1412 72 0. .1 699.9 ' 2 1012172 0. .0 698.8 ' 3 0612 272 0. .0 698.2
1 1424 73 0. .1 699.9 ' 2 1024173 0. .0 698.8 ' 3 0624 273 0. .0 698.2
1 1436 74 0. .1 699.9 2 1036174 0. .0 698.8 3 0636274 0. .0 6982
1 1448 75 0. .1 699.9 ' 2 1048 175 0. .0 698.8 ' 3 0648 275 0. .0 698.2
1 1500 76 0. .1 699.9 ' 2 1100176 0. .0 698.8 ' 3 0700 276 0. .0 698.2
1 1512 77 0. .1 699.9 ' 2 1112 177 0. .0 698.8 ' 3 0712 277 0. .0 698.2
1 1524 78 0. .1 699.9 ' 2 1124178 0. .0 698.8 ' 3 0724 278 0. .0 698.2
1 1536 79 0. .1 699.9 ' 2 1136 179 0. .0 698.7 ' 3 0736 279 0. .0 698.2
1 1548 80 0. .1 699.9 ' 2 1148180 0. .0 698.7 ' 3 0748 280 0. .0 698.2
1 1600 81 0. .1 699.9 ' 2 1200181 0. .0 698.7 ' 3 0800 281 0. .0 698.2
1 1612 82 0. .1 699.9 ' 2 1212182 0. .0 698.7 ' 3 0812 282 0. .0 698.2
1 1624 83 0. .1 699.9 ' 2 1224183 0. .0 698.7 ' 3 0824 283 0. .0 698.2
1 1636 84 0. .1 699.9 ' 2 1236184 0. .0 698.7 ' 3 0836 284 0. .0 6982
1 1648 85 0. .1 699.9 ' 2 1248185 0. .0 698.7 ' 3 0848 285 0. .0 698.2
1 1700 86 0. .1 699.9 ' 2 1300186 0. .0 698.7 ' 3 0900 286 0. .0 698.2
1 1712 87 0. .1 699.9 ' 2 1312187 0. .0 698.7 ' 3 0912 287 0. .0 698.2
1 1724 88 0. .1 699.9 ' 2 1324188 0. .0 698.7 ' 3 0924 288 0. .0 698.2
1 1736 89 0. .1 699.9 ' 2 1336189 0. .0 698.6 ' 3 0936 289 0. .0 698.2
1 1748 90 0. .1 699.8 ' 2 1348190 0. .0 698.6 ' 3 0948 290 0. .0 698.2
1 1800 91 0. .1 699.8 ' 2 1400191 0. .0 698.6 ' 3 1000 291 0. 0 698.1
1 1812 92 0. .1 699.8 ' 2 1412192 0. .0 698.6 ' 3 1012 292 0. .0 698.1
1 1824 93 0. .1 699.8 ' 2 1424193 0. .0 698.6 ' 3 1024 293 0. .0 698.1
1 1836 94 0. .1 699.8 ' 2 1436194 0. .0 698.6 ' 3 1036 294 0. .0 698.1
1 1848 95 0. .1 699.8 ` 2 1448195 0. .0 698.6 ' 3 1048 295 0. .0 698.1
1 1900 96 0. .1 699.8 ' 2 1500196 0. .0 698.6 ' 3 1100 296 0. .0 698.1
1 1912 97 0. .1 699.8 ' 2 1512197 0. .0 698.6 ' 3 1112 297 0. .0 698.1
1 1924 98 0. .1 699.8 ' 2 1524198 0. .0 698.6 ' 3 1124 298 0. .0 698.1
1 1936 99 0. .1 699.8 ' 2 1536199 0. .0 698.6 ' 3 1136 299 0. .0 698.1
1
.... 1948100
................ 0.
....... .1
...... 699.8 ' 2
.............. 1548 200
............... 0.
....... .0 698.6 ' 3
.................... 1148 300
»............. 0.
........ .0 698.1
......,........,...
PEAK OUTFLOW IS 0. AT TIME 5.60 HOURS
PEAK FLOW TIME
(CFS) (HR) 6-HR
0. 5.60 (CFS) 0.
(INCHES) .144
(AC-FT) 0.
PEAK STORAGE TIME
(AC-FT) (HR) 6-HR
0. 5.40 0.
MAXIMUM AVERAGE FLOW
24-HR 72-HR 59.80-HR
0. 0. 0.
.456 .656 .656
0. 0. 0.
MAXIMUM AVERAGE STORAGE
24-HR 72-HR 59.80-HR
0. 0.
PEAK STAGE TIME MAXIMUM AVERAGE STAGE
(FEET) (HR) 6-HR 24-HR 72-HR 59.80-HR
700.17 5.60 700.13 699.95 699.15 699.15
CUMULATIVE AREA= .01 SO MI
PEAK FLOW AND STAGE (END-OF-PERIOD) SUMMARY FOR MULTIPLE PLAN-RATIO ECONOMIC COMPUTATIONS
FLOWS IN CUBIC FEET PER SECOND, AREA IN SQUARE MILES
TIME TO PEAK IN HOURS
RATIOS APPLIED TO PRECIPITATION
OPERATION STATION AREA PLAN RATIO1
1.00
HYDROGRAPH AT DRAINA .01 1 FLOW
TIME 2.40
ROUTED TO SPILL .01 1 FLOW 0.
TIME 5.60
" PEAK STAGES IN FEET "
1 STAGE 700.17
TIME 5.60
SUMMARY OF DAM OVERTOPPINGBREACH ANALYSIS FOR STATION SPILL
PLAN 1 ............... INITIAL VALUE
ELEVATION 700.00
STORAGE 0.
OUTFLOW 0.
SPILLWAY CREST TOP OF DAM
702.00 702.00
1. 1.
0. 0.
RATIO MAXIMUM MAXIMUM MAXIMUM MAXIMUM DURATION TIME OF TIME OF
OF RESERVOIR DEPTH STORAGE OUTFLOW OVER TOP MAX OUTFLOW FAILURE
PMF W.S.ELEV OVER DAM AC-FT CFS HOURS HOURS HOURS
1.00 700.17 .00 0. 0. .00 5.60 .00
"' NORMAL END OF HEC•1 ".
MEMO
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?. ,.,,.,. Health, and Natural Resources eq
Printed on Recycled Paper