20011549 Ver 1_Revised Stormwater Info_20030205

WITHERS & RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
iii MacKenan Drive
CARY, NORTH CAROLINA, 27511
[phone]
FAX [phone]ooB
To: North Carolina Division of Water Quality
Wetlands/4oi Certification Unit
2321 Crabtree Blvd., Suite 250
Raleigh, North Carolina 27604-226o
WE ARE SENDING YOU
? Shop Drawings
? Copy of Letter
LETTER OF T° ° NSWTTQL
DATE 02/04/03 JOB No. 201113.0
ATrENnON Todd St. John
PHONE # [phone]
RE: Lon Lake Subdivision

B _

® Attached ? Unde?,separate cover via the following items:
? Prints ® Plans ? Samples ? Specifications
? Change order ? Diskette ?
COPIES DATE NO. DESCRIPTION
1 Revised Storm Water ManaJ;ement Plan
THESE ARE TRANSMITTED as checked below:
® For approval ? Approved as submitted ? Resubmit copies for approval
? For your use ? Approved as noted ? Submit copies for distribution
? As requested ? Returned for corrections ? Return corrected prints
? For review and comment ?
? FOR BIDS DUE 20 ? PRINTS RETURNED AFTER LOAN TO US
REMARKS:
COPYTO: Alan Hill, File SIGNED: Ken Jesneck, PE
if enclosures are not as noted, kindly notify us at once.
H/
RQ Michael F. Easley
G Govemor
y William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan Klimek, P.E., Director
IP Division of Water Quality
February 12, 2003
Pulte Homes Corp.
C/o Gray Methven
401 Harrison Oaks Blvd., Ste. 250
Cary, NC 27513
Subject: Stormwater Wetlands Phase 4
Long Lake
Wake County, NC
DWQ# 011549
Dear Mr. Methven:
This Office is in receipt of the plans dated January 10, 2003 and revised February 4, 2003 for the dry
detention basin "F' and forested filter strip Phase 4 at the subject facility prepared on your behalf by Withers
and Ravenel and submitted to the Division on February 5, 2003. Staff from the Wetlands Unit reviewed the
plans and found them acceptable. Please note that this approval is for water quality purposes only and shall
not be construed as an approval of the design for dam/outlet structure integrity, Dam Safety, public safety, or
flood attenuation purposes.
If you have any questions regarding this matter,-please contact Mr. Todd St. John at [phone].

o.: Raleigh DWQ Regional Office
File copy
Todd St. John, DWQ
Mr. Ken Jesneck, Withers and Ravenel, 111 MacKenan Dr., Cary NC 27511
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/
WITHERS RAVENEL.
EXTENDED DETENTION WETLAND
SUPPORTING DESIGN CALCULATIONS - REV/SED
LONG LAKE TERRACE
TRACT io, LONG LAKE SUBDIVISION
(FORMERLY LOT i, CORNERSTONE PARK)
Raleigh, North Carolina
Prepared For:
PULTE HOME CORPORATION
401 Harrison Oaks Boulevard, Suite 250
Cary, North Carolina 27513
Prepared By:
WITHERS & RAVENEL, INC
iii MacKenan Drive
Cary, North Carolina 27511
January 2003
W&R Project No. 202076
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LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Job File: K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
Rain Dir: I:\ENGFILE\HAESTAD\PPW RAINFALL DATA\WAKE CO\
JOB TITLE
--------------------------
--------------------------
Long Lake Terrace
Tract 10, Long Lake Subdivision
(Formerly Lot 1, Cornerstone Park)
REVISED Extended Detention Wetland Design
W&R Project #202076
January 2003
The Modified Rational Method was used to determine peak discharge rates and size the
detention storage for the extended detention wetland due to its small size (8.5
acres). The Modified Rational Method is an extension of the rational method for
rainfalls with durations greater than the time of concentration. The method was
modified so that the concepts of the rational method (peak discharge) could be used
to develop hydrographs for storage routing. The Modified Rational Method within
PondPack calculates the storage volume for hydrographs,of rainfalls of various
durations to determine the critical duration for the design storm as the one
requiring the greatest detention storage volume. This critical duration is used to
calculate the discharge rate and volume of water that is routed through the pond
structure. The hydrograph developed maintains the calculated volume and adjusts the
peak discharge rate accordingly. Thus, the peak discharge for the modified Rational
Method is less than the calculated Rational Method Qpeak.
The rainfall data used in this design was taken from the Intensity-Duration-Frequency
Table for the Raleigh area published in the City of Raleigh Stormwater Management
Design Manual. The time of concentration was set at 5 minutes for this design.
The proposed extended detention wetland is designed to capture the runoff volume from
the first 1-inch of rainfall and slowly release it over a 48 to 72 hour period. The
outlet structure is also designed to attenuate the 2-.year storm to pre-development
conditions and the 10-year storm to R-4 density conditions (compliance with CR-701.7).
In addition, the wetland is designed to pass the 100-year design storm through the
riser/barrel outlet structure of the pond.
Extended Detention Wetland Design Highlights:
Normal Pool Elevation = 396'
Required Surface Area = 0.15 acres
Surface Area Provided = 0.65 acres
Required storage volume for runoff from 1-inch rainfall =0.301 ac-ft
Storage volume provided = 0.668 ac-ft at 397'
Top of Dam = 399'
Calculated Freeboard for the 10-yr design storm = 1.92 ft
Calculated Freeboard for the 100-yr design storm = 1.5 ft
Outlet Structure:
¦ 48" RCP riser structure with crest at 397'
¦ 24" RCP barrel structure; 57 linear feet; Inverts at 393' and 392.43'
¦ 5" Circular orifice at 396' for extended draw-down
a
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Table of Contents
*******************,r** MASTER SUMMARY **********************
Watershed....... Mod. Rational Grand Summary ........ 1.01
Master Network Summary ..........,.. 1.02
********************** RAINFALL DATA ***********************
1-yr IDF Table.. 1-yr
I-D-F Table 2.01
2-yr IDF Table.. 2-yr
I-D-F Table ......................... 2.01
10-yr IDF Table 10-yr
I-D-F Table ........................ 2.02
100-yr IDF Table 100-yr
I-D-F Table ........................ 2.02
********************** TC CALCULATIONS ************r**t*****
PROPOSED AREA 1 Tc Calcs ........................... 3.01
R-4 DEVELOPED TC Tc Calcs ........................... 3.02
***t****************t** POND VOLUMES ***********************
WETLAND......... Vol: Elev-Area ..................... 4.01
******************** OUTLET STRUCTURES *********************
OUTLET.......... Outlet Input Data .................. 5.01
Composite Rating Curve 5.04
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Table of Contents (continued)
**********************'POND ROUTING **r*********tx*********
WETLAND......... Pond E-V-Q Table 6.01
****************** RATIONAL METHOD CALCS *******************
AREA 1.......... 1-yr
Mod. Rational Storm Calcs . .... 7.01
AREA 1.......... 2-yr
Mod. Rational Storm Calcs ......... 7.02
AREA 1............ 10-yr
Mod. Rational Storm Calcs .... 7.03
AREA 1.. ... 100-yr
Mod. Rational Storm Calcs .......... 7.04
PREDEV AREA 1... C and Area; Tc ..................... 7.05
PREDEV AREA 1... Rational Peak Qs ................•... 7.06
R-4,DEV AREA 1.. C and Area; Tc ...................... 7.07
R-4 DEV AREA 1.. Rational. Peak Qs .. . ..... ••.••••. 7.08
PROPOSED AREA 1 C and Area; Tc ................... 7.09
PROPOSED AREA 1 Rational Peak Qs ............. 7.10
******************** MINIMUM DRAIN TIME ********************
TIME-ELEV....... Min. Drain Time First Inch ••...••• 8.01
TIME-ELEV...,.... Min. Drain Time Below Riser......... 8.03
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Mod. Rational Grand Summary Page 1.01
Name. Watershed
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076.PPW
*
*
* MODIFIED RATIONAL METHOD
* ---- Grand Summary For All Storm Frequencies ----
Q CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
Area = 6.710 acres Tc .0833 hrs
... .... ...... .......... .. ....... VOLUMES
Freq. Adjusted Duration I Qpeak Allowable Inflow Storage
years 'C' hrs in/hr cfs _cfs ac-ft ac-ft
------------------------------------------------------ ---------------------
1 .766 .4000 2.5289 13.11 11.00 .433 .214
2 .766 .4000 3.1611 16.39 14.00 .542 .262
10 .766 .4167 4.1659 21.60 19.00 I .744 .351
100 766- .5667 4.9606 25.72 23.00 1.205 .587
• LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTI ON WETLAND DESIGN
Type.. .. Master Network Summary Page 1.02
Name.,. .. Watershed
File.. .. K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
MASTER DESIGN STORM SUMMARY
Defa ult Network Design Storm File , ID RAL IDF.IDQ Raleigh IDF
Rainfall
Return Event Type IDF File
- -------- - IDF ID
---------------
------------
1-yr -------------
I-D-F Table -
RAL IDF 1-yr IDF Table
2-yr I-D-F Table RAL IDF 2-yr IDF Table
10-yr I-D-,F Table RAL_IDF 10-yr IDF Table
100-yr I-D-F 'Table RAL_IDF 100-yr IDF Table
MASTER NET WORK SUMMARY
Modified Ration al Method Network
(*Node=Outfall; +Node=Diversion;)
' (Trun= HYG Truncation: Blank= None; L=Left; R=Rt; LR=Left&Rt)
Max
Return HYG Vol Qpeak Qpeak Max WSEL Pond Storage
Node ID Type Event ac-ft Trun hrs cfs ft ac-ft
---------
AREA 1 ------
AREA
1 .433
.0833
13.11
AREA 1 AREA 2 .542 .0833 16.39
AREA 1 AREA 10 .744 .0833 21.60
AREA 1 AREA 100 1.205 .0833 25.72
*OUTLET JCT 1 .322 .4700 .43
*OUTLET JCT 2 .415 .4700 .50
*OUTLET JCT 10 .589 .4900 1.63
*OUTLET JCT 100 1.042 .6000 14.37
WETLAND IN POND 1 .433 .0900 13.11
WETLAND IN POND 2 .542 .0900 16.39
WETLAND IN POND 10 .743 .0900 21.60
WETLAND IN POND 100 1.204 .0900 25.72
WETLAND OUT POND 1 .322 .4700 .43 396.64 .425
WETLAND OUT POND 2 .415 .4700 .50 396.80 .531
WETLAND OUT POND 10 .589 .4900 1.63 397.08 .725
WETLAND OUT POND 100 1.042 .6000 14.37 397.50 1.012
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... I-D-F Table Page 2.01
Name.... 1-yr IDF Table Tag: 1-yr Event: 1 yr
File.... I:\ENGFILE\HAESTAD\PPW RAINFALL DATA\WAKE CO\RAL_IDF.IDF
Title... 1-yr Design Storm (80% of 2-yr)
Storm... 1-yr IDF Table Tag: 1-yr
Rainfall-Intensity-Duration Curve
Time, hrs Intens., in/hr
-----------
-----------
.0833 4.6080
.1670 3.8080
.2500 3.2320
.3330 2.7760
.5000 2.1600
.6670 1.8240
.8330 1.5520
1.0000 1.3600
1.5000 .9760
2.0000 .7600
3.0000 .5680
6.0000 .3520
12.0000 .2080
24.0000 .1200
Type.... I-D-F Table
Name.... 2-yr IDF Table Tag: 2-yr Event: 2 yr
File.... I:\ENGFILE\HAESTAD\PPW RAINFALL DATA\WAKE CO\RAL_IDF.IDF
Title... 2-yr Storm from City of Raleigh IDF Table
Storm... 2-yr IDF Table Tag: 2-yr
Rainfall-Intensity-Duration Curve
Time, hrs Intens., in/hr
.0833
.1670
.2500
.3330
.5000
.6670
.8330
1.0000
1.5000
2.0000
3.0000
6.0000
12.0000
24.0000
5.7600
4.7600
4.0400
3.4700
2.7000
2.2800
1.9400
1.7000
1.2200
.9500
.7100
.4400
.2600
.1500
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... I-D-F Table Page 2.02
Name.... 10-yr IDF Table Tag: 10-yr Event: 10 yr
File.... I:\ENGFILE\HAESTAD\PPW RAINFALL DATA\WAKE CO\RAL_IDF.IDF
Title... 10-yr Event Table from City of Raleigh IDF Table
Storm... 10-yr IDF Table Tag: 10-yr
Rainfall-Intensity-Duration Curve
Time, hrs
.0833
.1670
.2500
.3300
.5000
.6670
.8330
1.0000
1.5000
2.0000
3.0000
6.0000
12.0000
24.0000
Intens., in/hr
7.5000
6.1300
5.2500
4.6400
3.7100
3.1500
2.7100
2.4100
1.7400
1.3700
1.0200
.6500
.3900
.2200
Type.... I-D-F Table
Name.... 100-yr IDF Table Tag: 100-yr Event: 100 yr
File.... I:\ENGFILE\HAESTAD\PPW RAINFALL DATA\WAKE CO\RAL_IDF.IDF
Title... 100-yr Event from City of Raleigh IDF Table
Storm... 100-yr IDF Table Tag: 100-yr
Rainfall-Intensity-Duration Curve
Time, hrs Intens., in/hr
.0833
.1670
.2500
.3330
.5000
.6670
.8330
1.0000
1.5000
2.0000
3.0000
6.0000
12.0000
24.0000
9.7200
8.4000
7.2400
6.4700
5.2800
4.4800
3.8800
3.5000
2.5300
2.0000
1.5000
.9600
.5700
.3300
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Tc Calcs
Name.... PROPOSED AREA 1
Page 3.01
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
TIME OF CONCENTRATION CALCULATOR
Segment #1: Tc: User Defined
Description: Tc = 5 Minutes
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Tc Calcs Page 3.02
Name.... R-4 DEVELOPED TC
File.... K:\02\02-070\02076\I&H\CORNESTONE TERRACE WETLAND 20 2076.PPW
TIME OF CONCENTRATION CALCULATOR
-------
Segment ----------------------------------
#1: Tc: User Defined ------------------- ------------
Descriptions Tc = 5 minutes in On-site Pi pe System

-------
---------------------------------- Segment #1 Time:
------------------- .0833 hrs
------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Vol: Elev-Area Page 4.01
Name.... WETLAND
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_ 202076.PPW
Elevation Planimeter Area Al+A2+sgr(Al*A2) Volume Volume Sum
(ft) (sq.in) (acres)
------ (acres)
----------------- (ac-ft)
-------- (ac-ft)
--------------
-------------------------
396.00 ----- --
.6520 .0000 .000 .000
397.00 ----- .6850 2.0053 .668 .668
398.00 ----- .7180 2.1043 .701 1.370
399.00 ----- .7520 2.2048 .735 2.105
POND VOLUME EQUATIONS
* Incremental volume computed by the Conic Method for Reservoir Volumes.
Volume = (1/3) * (EL2-ELl) * (Areal + Area2 + sq.rt.(Area1*Area2))
where: ELI, EL2 = Lower and upper elevations of the increment
Areal,Area2 = Areas computed for ELI, EL2, respectively
Volume = Incremental volume between ELI and EL2
o `
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Outlet Input Data Page 5.01
Name.... OUTLET
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
REQUESTED POND WS ELEVATIONS:
Min. Elev.= 396.00 ft
Increment = .10 ft
Max. Elev. 399.00 ft
**********************************************
OUTLET CONNECTIVITY
---> Forward Flow Only (Upstream to DnStream)
< -Reverse Flow Only (DnStream to UpStream)
<---> Forward and Reverse Both Allowed
Structure No. Outfall E1, ft E2, ft
----------------- ---- ------- --------- ---------
Stand Pipe RI ---> CV 397.000 399.000
Orifice-Circular OR ---> CV 396.000 399.000
Culvert-Circular CV ---> TW 393.000 399.000
TW SETUP, DS Channel

LONG LAKE TERRACE -TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Outlet Input Data Page 5.02
Name.... OUTLET
File.... K;\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
OUTLET STRUCTURE INPUT DATA
Structure ID = RI
Structure Type
-
- = Stand Pipe
-------------
------
---------
------
## of openings = 1
Invert Elev. = 397.00 ft
Diameter = 4.0000 ft
orifice Area = 12.5664 sq.ft
orifice Coeff. _ .600
Weir Length = 12.57 ft
Weir Coeff. = 3.100 -
K, Submerged = .000
K, Reverse = 1.000
Kb,Barrel = .000000 (per ft of full flow)
Barrel Length = .00 ft
Mannings n = .0000
Structure ID = OR
Structure Type = Orifice-Circular
------------------------------------
## of Openings = 1
Invert Elev. = 396.00 ft
Diameter = .4167 ft
orifice Coeff. _ .600
M ?
LONG LAKE TERRACE -TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Outlet Input Data Page 5.03
Name.... OUTLET
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
OUTLET STRUCTURE INPUT DATA
Structure ID = CV
Structure Type
----- = Culvert-Circular
------------------
-------------
No. Barrels = 1
Barrel Diameter = 2.0000 ft
Upstream Invert = 393.00 ft
Dnstream Invert = 392.43 ft
Horiz. Length = 57.00 ft
Barrel Length = 57.00 ft
Barrel Slope = .01000 ft/ft
OUTLET CONTROL DATA...
Mannings n = .0130
Ke = .5000 (forward entrance loss)
Kb = .012411 (per ft of full flow)
Kr = 5000 (reverse entrance loss)
HW Convergence = .001 +/- ft
INLET CONTROL DATA...
Equation form = 1
Inlet Control K = .0098
Inlet Control M = 2.0000
Inlet Control c = .03980
Inlet Control Y = .6700
T1 ratio (HW/D) = 1.155
T2 ratio (HW/D) = 1.302
Slope Factor = -.50-0
Use unsubmerged inlet control Form 1 equ. below Tl elev.
Use submerged inlet control Form 1 equ. above T2 elev.
In transition zone between unsubmerged and submerged inlet control,
interpolate between flows at T1 & T2...
At T1 Elev = 395.31 ft ---> Flow = 15.55 cfs
At T2 Elev = 395.60 ft ---> Flow = 17.77 cfs
Structure ID = TW
Structure Type = TW SETUP, DS Channel
------------------------------------
FREE OUTFALL CONDITIONS SPECIFIED
CONVERGENCE TOLERANCES...
Maximum Iterations= 30
Min. TW tolerance = .01 ft
Max. TW tolerance = .01 ft
Min. HW tolerance = 01 ft
Max. HW tolerance = .01 ft
Min. Q tolerance = .10 cfs
Max.. Q tolerance = .10 cfs

LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Composite Rating Curve
Name.... OUTLET
Page 5.04
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev, Total Q Not es
-------- -------- ------ -- Converge ------- ---- --- -----------
Elev. Q TW El ev Error
ft cfs ft +/-ft Contributing Structures
------------------
--------
396.00 -------
.00 ------
Free -- -----
Outfall --------
(no Q: RI; OR, CV)
396.10 .02 Free Outfall OR,CV (no Q: RI)
396.20 .08 Free Outfall OR,CV (no Q: RI)
396.30 .17 Free Outfall OR,CV (no Q: RI)
396.40 .27 Free Outfall OR,CV (no Q: RI)
396.50 .35 Free Outfall OR,CV (no Q: RI)
396.60 .41 Free Outfall OR,CV (no Q.: RI)
396.70 .46 Free Outfall OR,CV (no Q: RI)
396.80 .50 Free Outfall OR,CV (no Q: RI)
396.90 .55 Free Outfall OR,CV (no Q: RI)
397.00 .58 Free Outfall OR,CV (no Q: RI)
397.10 1.85 Free Outfall RI,OR,C V
397.20 4.14 Free Outfall RI,OR,C V
397.30 7.09 Free Outfall RI,OR,C V
397.40 10.57 Free Outfall RI,OR,C V
397.50 14.52 Free Outfall RI,OR,C V
397.60 18.88 Free Outfall RI,OR,C V
397.70 23.52 Free Outfall RI,OR,C V
397.80 28.21 Free Outfall RI,CV (no Q: OR)
397.90 29.75 Free Outfall RI,CV (no Q: OR)
398.00 30.17 Free Outfall RI,CV (no Q: OR)
398.10 30.58 Free Outfall RI,CV (no Q: OR)
398.20 30.98 Free Outfall RI,CV (no Q: OR)
398.30 31.38 Free Outfall RI,CV (no Q: OR)
398.40 31.77 Free Outfall RI,CV (no Q: OR)
398.50 32.16 Free Outfall RI,CV (no Q: OR)
398.60 32.54 Free Outfall RI,CV (no Q: OR)
398.70 32.92 Free Outfall RI,CV (no Q: OR)
398.80 33.30 Free Outfall RI,CV (no Q: OR)
398.90 33.66 Free Outfall RI,CV (no Q: OR)
399.00 34.03 Free Outfall RI,CV (no Q: OR)
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Pond E-V-Q Table Page 6.01
Name.... WETLAND
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076-PPW
LEVEL POOL ROUTING DATA
HYG Dir = K:\02\02-070\02076\H&H\
Inflow HYG file = NONE STORED - WETLAND IN 1-yr
outflow HYG file = NONE STORED - WETLAND OUT 1-yr
Pond Node Data = WETLAND
Pond Volume Data = WETLAND
Pond Outlet Data = OUTLET
No Infiltration
INITIAL CONDITIONS
Starting WS Elev = 396.00 ft
Starting Volume = .000 ac- ft
Starting Outflow = .00 cfs
Starting Infiltr. _ .00 cfs
Starting Total Qout= .00 cfs
Time Increment _ .0100 hrs
Elevation Outflow Storage Area Infilt. Q Total 2S/t + O
ft cfs ac-ft acres cfs
--------- cfs
------------ cfs
----------
------------
396.00 ------------
.00 ---------
.000 ---- --------
.6520 --
.00 .00 .00
396.10 .02 .065 .6553 .00 .02 158.21
396.20 .08 .131 .6585 .00 .08 317.25
396.30 .17 .197 .6618 .00 .17 477.06
396.40 .27 .263 .6651 .00 .27 637.73
396.50 .35 .330 .6684 .00 .35 799.17
396.60 .41 .397 .6717 .00 .41 961.39
396.70 .46 .464 .6750 .00 .46 1124.41
396.80 .50 .532 .6783 .00 .50 1288.17
396.90 .55 .600 .6817 .00 .55 1452.78
397.00 .58 .668 .6850 .00 .58 1618.19
397.10 1.85 .737 .6883 .00 1.85 1785.63
397.20 4.14 .806 .6915 .00 4.14 1954.89
397.30 7.09 .875 .6948 .00 7.09 2125.54
397.40 10.57 .945 .6981 .00 10.57 2297.58
397.50 14.52 1.015 .7014 .00 14.52 2470.88
397.60 18.88 1.085 .7047 .00 18.88 2645.39
397.70 23.52 1.156 .7080 .00 23:52 2820.98
397.80 28.21 1.227 .7113 .00 28.21 2997.37
397.90 29.75 1.298 .7147 .00 29.75 3171.47
398.00 30.17 1.370 .7180 .00 30.17 3345.25
398.10 30.58 1.442 .7214 .00 30.58 3519.83
398.20 30.98 1.514 .7247 .00 30.98 3695.22
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Pond E-V-Q Table Page 6.02
Name.... WETLAND
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
LEVEL POOL ROUTING DATA
HYG Dir = K:\02\02-070\02076\H&H\
Inflow HYG file = NONE STORED - WETLAND IN 1-yr
outflow HYG file= NONE STORED - WETLAND OUT 1-yr
Pond Node Data = WETLAND
Pond Volume Data = WETLAND
Pond Outlet Data = OUTLET
No Infiltration
INITIAL CONDITIONS
Starting WS Elev = 396.00 ft
Starting Volume = .000 ac- ft
Starting Outflow = .00 cfs
Starting Infiltr. _ .00 cfs
Starting Total Qout= .00 cfs -
Time Increment = .0100 hrs
Elevation Outflow Storage Area Infilt. Q Total 2S/t + 0
ft cfs ac-ft acres
--- cfs
----------- cfs
------------ cfs
----------
------------
398.30 -------------
31.38 --------
1.587 ---- -----
.7281 .00 31.38 3871.37
398.40 31.77 1.660 .7315 .00 31.77 4048.39
398.50 32.16 1.733 .7349 .00 32.16 4226.22
398.60 32.54 1.807 .7383 .00 32.54 4404.88
398.70 32.92 1.881 .7417 .00 32.92 4584.35
398.80 33.30 1.955 .7451 .00 33.30 4764.59
398.90 33.66 2.030 .7486 .00 33.66 4945.71
399.00 34.03 2.105 .7520 .00 34.03 5127.65
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Mod. Rational Storm Calcs Page 7.01
Name.... AREA 1 Tag: 1-yr Event: 1 yr
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
Storm... 1-yr IDF Table Tag: 1-yr
MODIFIED RATIONAL METHOD
---- Summary for Single Storm Frequency ----
Q = CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
RETURN FREQUENCY: 1 yr 'C' Adjustment = 1.000Allowable Q = 11.00 cfs
----------------------------------------------------------------------------
Hydrograph Storm Duration, Td = .4000 hrs Tc = .0833 hrs
Hydrograph File: 1-yr
... ...... ..... ......... . ........ .... .. .......... VOLUMES
Wtd. Adjusted Duration Intens. Area Qpeak Inflow Storage
-C' 'C' hrs in/hr acres cfs
--------- ac-ft
------- ac-ft
---------
----------------
.766 .766 -----------
.0833 -----------
4.6080 --------
6.710 23.89 .164 .089
.766 .766 .1667 3.8112 6.710 19.76 .272 .159
.766 .766 .2500 3.2320 6.710 16.76 .346 .195
.766 .766 .3333 2.7748 6.710 14.39 .396 .207
************************************************************ Storage Maximum
.766 .766 .4000 2.5289 6.710 13.11 I .433 .214
.766 .766 .5000 2.1600 6.710 11.20 .463 .198
.766 .766 .6667 1.8247 6.710 9.46 Qpeak < Qallow
e `
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Mod. Rational Storm Calcs Page 7.02
Name.... AREA 1 Tag 2-yr Event: 2 yr
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
Storm... 2-yr IDF Table Tag: 2-yr
MODIFIED RATIONAL METHOD
--- Summary for Single Storm Frequency ----
Q = CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
RETURN FREQUENCY:
----------------- 2 yr 'C'
---------- Adjustment
----------- = 1.000Allowable
------------------- Q = 14.00
--------- cfs
----------
Hydrograph Storm Duration, Td = .4000 hrs Tc = .0833 hrs
Hydrograph File: 2-yr
................ ....... ..... . ....... . VOLUMES
Wtd. Adjusted Duration Intens. Area Qpeak Inflow Storage
'Cl 'C' hrs in/hr acres
- cfs
-
--------- ac-ft
---}------ ac-ft
----------
.766 .766 .0833 --------
5.7600 ------
6.710 -
29.87 I .206 .109
.766 .766 .1667 4.7640 6.710 24.70 .340 .196
.766 .766 .2500 4.0400 6.710 20.95 .433 .240
.766 .766 .3333 3.4685 6.710 17.99 .495 .254
************************************************************ Storage Maximum
766 .766 .4000 3.1611 6.710 16.39. 542 .262
.766 .766 .5000 2.7000 6.710 14.00 .579 .241
.766 .766 .6667 2.2808 6.710 11.83 Qpeak < Qallow
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Mod. Rational Storm Calcs Page 7.03
Name.... AREA 1 Tag: 10-yr Event: 10 yr
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
Storm... 10-yr IDF Table Tag: 10-yr
MODIFIED RATIONAL METHOD
---- Summary for Single Storm Frequency ----
Q = CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
RETURN
------- FREQUENCY:
---------- 10 yr 'C' Adjustment = 1.000Allowable
---------------------------------------- Q = 19.00
---------- cfs
---------
Hydrograph Storm Duration, Td = .4167 hrs Tc = .0833 hrs
Hydrograph File: 10-yr
....... .......... ......... ........... .... VOLUMES
Wtd. Adjusted Duration Intens. Area Qpeak Inflow Storage
'C' 'C' hrs in/hr acres cfs
- ac-ft
-
------ ac-ft
---------
-------
.766 ----------
.766 ---------
.0833 -----------
7.5000 --------
6.710 -------
- --
38.89 --
-
.268 .137
.766 .766 .1667 6.1355 6.710 31.81 I .438 .242
.766 .766 .2500 5.2500 6.710 27.22 .562 .301
.766 .766 .3333 4.6218 6.710 23.97 .660 .333
************************************************************ Storage Maximum
766 .766 .4167 4.1659 6.710 21.60 I .744 .351
****************************************************************************
.766 .766 .5000 3.7100 6.710 19.24 .795 .337
.766 .766 .6667 3.1511 6.710 16.34 Qpeak < Qallow
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Mod. Rational Storm Calcs Page 7.04
Name.... AREA 1 Tag: 100-yr Event: 100 yr
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND _202076.PPW
Storm... 100-yr IDF Table Tag: 100-yr
MODIFIED RATIONAL METHOD
---- Summary for Single Storm Frequency ----
Q = CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
RETURN
------- FREQUENCY:
----------- 100 yr
--------- 'C' Adjustment = 1.000Allowable
-------------------------------- Q =23.00
---------- cfs
--------
Hydrograph Storm Duration, Td = .5667 hrs Tc = .0833 hrs
Hydrograph File: 100-yr
VOLUMES
Wtd. Adjusted Duration Intens. Area Qpeak Inflow Storage
'C' hrs in/hr
- acres cfs
------- --- ac-ft
---------- ac-ft
--------
------
.766 -----------
.766 ---------
.0833 -------
---
9.7200 ---------
6.710 -
50.40 .347 .189
.766 .766 .1667 8.4053 6.710 43.58 I .600 .363
.766 .766 .2500 7.2400 6.710 37.54 .776 .459
.766 .766 .3333 6.4676 6.710 33.54 .924 .528
.766 .766 .5000 5.2800 6.710 27.38 1.131 .577
************************************* ********************* ** Storage Maximum
.766 .766 .5667 4.9606 6.710 25.72 I 1.205 .587

.766 .766 .6667 4.4816 6.710 23.24 I 1.280 .568
.766 .766 .8333 3.8792 6.710 20.12 Qpeak < Qallow

LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... C and Area Page 7.05
Name.... PRE-DEVELOPMENT
File.... K;\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
RATIONAL C COEFFICIENT DATA
Area C x Area
Soil/Surface Description C acres acres
-------------------------------- -------- ----- ---- ----------
Wooded .2500 6.710 1.678
WEIGHTED C & TOTAL AREA ---> .2500 6.710 1.678
Type.... Tc Calcs
Name.... PRE-DEV KIRPICH
TIME OF CONCENTRATION CALCULATOR
Segment #1: Tc: Kirpich (TN)
Description: Pre-Development Kirpich
Hydraulic Length 847.00 ft
slope .055500 ft/ft
multiplier 1.000 (Tc Adjustment)
Avg.Velocity. 3.31 ft/sec
Segment #1 Time: .0711 hrs
--------------------------------------------------------------------- --
Total Tc: .0711 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
T
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Rational Peak Q's Page 7.06
Name.... PREDEV
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076.PPW
SUMMARY OF RATIONAL METHOD PEAK DISCHARGES
Q = CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
Rational Storms: RAL IDF.IDQ Raleigh IDF
Tag
- Freq File
-------
----- IDF Curve
-----------
-----
- -
---
100-yr ------
100 RAL_IDF.IDF 100-yr IDF Table
Tc = .0833 hrs

Tag
Freq
C
C adj ----------
j C --------
I ------------
Area I
Peak Q
(years) factor
------ final
---------- in/hr.
-
------- acres
-----------? cfs
----------
-----
1-yr 1 -----
.250 1.000 .250 ,
4.6080 6.710 7.79
2-yr 2 .250 1.000 .250 5.7600 6.710 I 9.74
10-yr 10 .250 1.000 .250 7.5000 6.710 12.69
100-yr 100 .250 1.000 .250
---------- 9.7200
-------- 6.710
----------- 16.44
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... C and Area Page 7.07
Name . R-4 DEV AREA 1
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
RATIONAL C COEFFICIENT DATA
Area C x Area
Soil/Surface Description C acres acres
-------------------------------- -------- ---------- ----------
Drainage Area at R-4 .5000 6.710 3.355
WEIGHTED C & TOTAL AREA ---> .5000 6.710 3.355
Type.... Tc Calcs
Name.... R-4 DEVELOPED TC
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
TIME OF CONCENTRATION CALCULATOR
Segment #1: Tc: User Defined
Description: Tc = 5 minutes in On-site Pipe System
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Rational Peak Q's Page 7.08
Name.... R-4
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
SUMMARY OF RATIONAL METHOD PEAK DISCHARGES
Q = CiA * Units. Conversion; Where Conversion = 43560 / (12 * 3600)
Rational Storms: RAL IDF.IDQ Raleigh IDF
Tag Freq File
------
------ IDF Curve
-----------
-----
-----
100-yr ------
100 RAL_IDF.IDF 100-yr IDF Table
Tc = .0833 hrs

Tag
Freq
C
C adj ----------
C --------
I -----------
Area
Peak Q
(years) factor
-
= final
---------- in/hr
-------- acres
-----------? cfs
----------
-----
1-yr ------
1 -----
.500 -
---
1.000 .500 4.6080 6.710 15.59
2-yr 2 .500 1.000 .500 5.7600 6.710 19.49
10-yr 10 ..500 1.000 .500 7.5000 6.710 25.37
100-yr 100 .500 1.000 I .500
---------- 9.7200
-------- 6.710
----------- 32.88
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... C and Area
Name.... PROPOSED AREA 1.
Page 7.09
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076.PPW
RATIONAL C COEFFICIENT DATA
Area C x Area
Soil/Surface Description C acres acres
-------------------------------- -------- ---------- ----------
Impervious On-site Area .9500 4.950 4.703
Pervious On-site Area; lawn .2500 1.760 .440
WEIGHTED C & TOTAL AREA ---> .7664 6.710 5.143
Type.... Tc Calcs
Name.... PROPOSED AREA 1
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
TIME OF CONCENTRATION CALCULATOR
Segment #1: Tc: User Defined
Description: Tc = 5 Minutes
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
-------------------------
-------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
-------------------------
-------------------------
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type .... Rational Peak Q's Page 7.10
Name.... POSTDEV
File..,. K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
SUMMARY OF RATIONAL METHOD PEAK DISCHARGES
Q CiA * Units Conversion; Where Conversion = 43560 / (12 * 3600)
Rational Storms: RAL IDF.IDQ Raleigh IDF
Tag Freq
-- File
-------
----- IDF Curve
-----------
-----
-----
100-yr ----
100 RAL_IDF.IDF 100-yr IDF Table
Tc = .0833 hrs

Tag
Freq
C
C adj ----------
C --------
I -----------
Area
Peak Q
(years) factor final
-
- in/hr. acres cfs
------
-----
1-yr 1 -----
.766 ------
1.000 -----
-
--
.766 --------
4.6080 -----------?
6.710 ----
23.89
2-yr 2 .766 1.000 .766 5.7600 6.710 29.87
10-yr 10 .766 1.000 .766 7.5000 6.710 38.89
100-yr 100 .766 1.000 .766
---------- 9.7200
-------- 6.710
----------- 50.40
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Time-Elev Page 8.01
Name.... MIN. DRAIN TIME FOR RUNOFF FROM FIRST 1-INCH RAINFALL
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076.PPW
TIME vs. ELEVATION (ft)
Time Output Time increment = .2500 hrs
hrs
-------
- - Time on
-----
- left represents
- time for first value in
- each row.
-
.0000 --
---
396.60 -
--------------
396.59 ---------
396.58 -
-------------
396.56 ----------
396.55
1.2500 396.54 396.53 396.52 396.51 396.49
2.5000 396.48 396.47 396.46 396.45 396.44
3.7500 ( 396.43 396.43 396.42 396.41 396.40
5.0000 396.39 396.38 396.37. 396.37 396.36
6.2500 ( 396.35 396.35 396.34 396.33 396.33
7.5000 396.32 396.32 396.31 396.30 396.30
8.7500 396.29 396.29 396.28 396.28 396.27
10.0000 I 396.27 396.27 396.26 396.26 396.25
11.2500 396.25 396.25 396.24 396.24 396.24
12.5000 396.23 396.23 396.23 396.22 396.22
13.7500 396.22 396.21 396.21 396.21 396.21
15.0000 I 396.20 396.20 396.20 396.20 396.19
16.2500 396.19 396.19 396.19 396.18 396.18
17.5000 396.18 396.18 396.18 396.17 396.17
18.7500 396.17 396.17 396.17 396.16 396.16
20.0000 I 396.16 396.16 396.16 396.15 396.15
21.2500 I 396.15 396.15 396.15 396.15 396.15
22.5000 396.14 396.14 396.14 396.14 396.14
23.7500 396.14 396.14 396.13 396.13 396.13
25.0000 I 396.13 396.13 396.13 396.13 396.13
26.2500 396.12 396.12 396.12 396.12 396.12
27.5000 396.12 396.12 396.12 396.12 396.12
28.7500 396.11 396.11 396.11 396.11 396.11
30.0000 396.11 396.11 396.11 396.11 396.11
31.2500 396.11 396.11 396.10 396.10 396.10
32.5000 396.10 396.10 396.10 396.10 396.10
33.7500 ( 396.10 396.10 396.10 396.10 396.10
35.0000 396.10 396.09 396.09 396.09 396.09
36.2500 396.09 396.09 396.09 396.09 396.09
37.5000 396.09 396.09 396.09 396.09 396.09
38.7500 396.09 396.09 396.09 396.08 396.08
40.0000 396.08 396.08 396.08 396.08 396.08
41.2500 I 396.08 396.08 396.08 396.08 396.08
42.5000 396.08 396.08 396.08 396.08 396.08
43.7500 396.08 396.08 396.07 396.07 396.07
45.0000 396.07 396.07 396.07 396.07 396.07
46.2500 396.07 396.07 396.07 396.07 396.07
47.5000 I 396.07 396.07 396.07 396.07 396.07
48.7500 396.07 396.07 396.07 396.07 396.06
50.0000 396.06 396.06 396.06 396.06 396.06
51.2500 396.06 396.06 396.06 396.06 396.06
52.5000 396.06 396.06 396.06 396.06 396.06
53.7500 I 396.06 396.06 396.06 396.06 396.06
55.0000 I 396.06 396.06 396.06 396.06 396.05
LONG LAKE TERRACE TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Time-Elev Page 8.02
Name.... MIN. DRAIN.TIME FOR RUNOFF FROM FIRST 1-INCH RAINFALL
File.... K.\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND_202076.PPW
TIME vs. ELEVATION (ft)
Time I Output Time increment = .2500 hrs
hrs Time on left represents time for first value in
-------------- each row.
----------
--------- -
56.2500 ---------------
396.05 -----------
396.05 ----------
396.05 -
396.05 396.05
57.5000 396.05 396.05 396.05 396.05 396.05
58.7500 I 396.05 396.05 396.05 396.05 396.05
60.0000 396.05 396.05 396.05 396.05 396.05
61.2500 396.05 396.05 396.05 396.05 396.05
` 62.5000 396.05 396.05 396.05 396.05 396.04
63.7500 I 396.04 396.04 396.04 396.04 396.04
65.0000 396.04 396.04 396.04 396.04 396.04
66.2500 396.04 396.04 396.04 396.04 396.04
67.5000 396.04 396.04 396.04 396.04 396.04
68.7500 396.04 396.04 396.04 396.04 396.04
70.0000 396.04 396.04 396.04 396.04 396.04
71.2500 396.04 396.04 396.04 396.04 396.04
72.5000 I 396.04 396.04 396.03 396.03 396.03
73.7500 396.03 396.03 396.03 396.03 396.03 .
75.0000 I 396.03 396.03 396.03 396.03 396.03
76.2500 396.03 396.03 396.03 396.03 396.03
77.5000 I 396.03 396.03 396.03 396.03 396.03
78.7500 396.03 396.03 396.03 396.03 396.03
80.0000 396.03 396.03 396.03 396.03 396.03
81.2500 I 396.03 396.03 396.03 .396.03 396.03
82.5000 396.03 396.03 396.03 396.03 396.03
83.7500 396.03 396.03 396.03 396.03 396.03
85.0000 I 396.03 396.03 396.02 396.02 396.02
86.2500 396.02 396.02 396.02 396.02 396.02
87.5000 396.02 396.02 396.02 . 396.02 396.02
88.7500 I 396.02 396.02 396.02 396.02 396.02
90.0000 396.02 396.02 396.02 396.02 396.02
91.2500 396.02 396.02 396.02 396.02 396.02
92.5000 396.02 396.02 396.02 396.02 396.02
93.7500 396.02 396.02 396.02 396.02 396.02
95.0000 396.02 396.02 396.02 396.02 396.02
96.2500 I 396.02 396.02 396.02 396.02 396.02
97.5000 396.02 396.02 396.02 396.02 396.02
98.7500 396.02 396.02 396.02 396.02 396.02
100.0000 396.02 396.02 396.02 396.02 396.02
101.2500 396.02 396.02 396.02 396.02 396.02
102.5000 396.02 396.02 396.02 396.02 396.02
103.7500 I 396.02 396.02 396.02 396.02 396.01
105.0000 396.01 396.01 396.01 396.01 396.01
106.2500 I 396.01 396.01
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type.... Time-Elev Page 8.03
Name.... MIN DRAIN TIME FOR STORAGE BELOW RISER CREST (397')
File.... K;\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076.PPW
TIME vs. ELEVATION (ft)
Time Output Time increment = .2500 hrs
hrs Time on left represents time for first value in
------------ each row.
----------
--------- -
.0000 I ---------------
397.00 -----------
396.98 ----------
396.97 ---
396.95 396.93
1.2500 396.91 396.90 396.88 396.86 396.85
2.5000 396.83 396.82 396.80 396.79 396.77
3.7500 396,76 396.74 396.73 396.71 396.70
5.0000 396.68 396.67 396.66 396.64 396.63
6.2500 396.62 396.61 396.59 396.58 396.57
7.5000 396.56 396.54 396.53 396.52 396.51
8.7500 396.50 .396.49 396.48 396.47 396.46
10.0000 396.45 396.44 396.43 396.42 396.41
11.2500 396.40 396.39 396.39 396.38 396.37
12.5000 396.36 396.36 396.35 396.34 396.34
13.7500 396.33 396.32 396.32 396.31 396.31
15.0000 396.30 396.30 396.29 396.29 396.28
16.2500 396.28 396.27 396.27 396.26 396.26
17.5000 396.26 396.25 396.25 396.24 396.24
18.7500 396.24 396.23 396.23 396.23 396.22
20.0000 396.22 396.22 396.21 396.21 396.21
21.2500 396.21 396.20 396.20 396.20 396.20
22.5000 396.19 396.19 396.19 396.19 396.18
23.7500 396.18 396.18 396.18 396.18 396.17
25.0000 396.17 396.17 396.17 396.17 396.16
26.2500 396.16 396.16 396.16 396.16 396.16
27.5000 I 396.15 396.15 396.15 396.15 396.15
28.7500 396.15 396.14 396.14 396.14 396.14
30.0000 396.14 396.14 396.14 396.13 396.13
31.2500 396.13 396.13 396.13 396.13 396.13
32.5000 396.13 396.13 396.12 396.12 396.12
33.7500 396.12 396.12 396.12 396.12 396.12
35:0000 396.12 396.11 396.11 396.11 396.11
36.2500 396.11 396.11 396.11 396.11 396.11
37.5000 396.11 396.11 396.11 396.10 396.10
38.7500 396.10 396.10 396.10 396.10 396.10
40.0000 396.10 396.10 396.10 396.10 396.10
41.2500 396.10 396.10 396.10 396.09 396.09
42.5000 396.09 396.09 396.09 396.09 396.09
43.7500 I 396.09 396.09 396.09 396.09 396.09
45.0000 396.09 396.09 396.09 396.09 396.09
46.2500 I 396.08 396.08 396.08 396.08 396.08
47.5000 396.08 396.08 396.08 396.08 396.08
48.7500 396.08 396.08 396.08 396.08 396.08
50.0000 396.08 396.08 396.08 396.07 396.07
51.2500 396.07 396.07 396.07 396.07 396.07
52.5000 I 396.07 396.07 396.07 396.07 396.07
53.7500 396.07 396.07 396.07 . 396.07 396.07
55.0000 396.07 396.07 396.07 396.07 396.07
c
LONG LAKE TERRACE - TRACT 10, LONG LAKE SUBDIVISION
PONDPACK OUTPUT FOR EXTENDED DETENTION WETLAND DESIGN
Type .. Time-Elev Page 8.04
Name.... MIN DRAIN TIME FOR STORAGE BELOW RISER CREST (3971)
File.... K:\02\02-070\02076\H&H\CORNESTONE TERRACE WETLAND 202076.PPW
TIME vs. ELEVATION (ft)
Time Output Time increment = .2500 hrs
hrs Time on left represents
- time for first value in
----------- each row.
----------
--------- -
56.2500. ---------------
396.06 ------
-----
396.06 ---------
396.06 ----
396.06 396.06
57.5000 396.06 396.06 396.06 396.06 396.06
58.7500 396.06 396.06 396.06 396.06 396.06
60.0000 396.06 396.06 396.06 396.06 396.06
61.2500 396.06 396.06 396.06 396.06 396.06
62.5000 I 396.05 396.05 396.05 396.05 396.05
63.7500 396.05 396.05 396.05 396.05 396.05
65.0000 I 396.05 396.05 396.05 396.05 396.05
66.2500 396.05 396.05 396.05 396.05 396.05
67.5000 396.05 396.05 396.05 396.05 396.05
68.7500 396.05 396.05 396.05 396.05 396.05
70.0000 396.04 396.04 396.04 396.04 396.04
71.2500. 396.04 396.04 396.04 396.04 396.04
72.5000 396.04 396.04 396.04 396.04 396.04
73.7500 396.04 396.04 396.04 396.04 396.04
75.0000 396.04 396.04 396.04 396.04 396.04
76.2500 396.04 396.04 396.04 396.04 396.04
77.5000 396.04 396.04 396.04 396.04 396.04
78.7500 396.04 396.04 396.04 396.03 .396.03
80.0000 396.03 396.03 396.03 396.03 396.03
81.2500 396.03 396.03 396.03 396.03 396.03
82.5000 396.03 396.03 396.03 396.03 396.03
83.7500 396.03 396.03 396.03 396.03 396.03
85.0000 396.03 396.03 396.03 396.03 396.03
86.2500 I 396.03 396.03 396.03 396.03 396.03
87.5000 ( 396.03 396.03 396.03 396.03 396.03
88.7500 I 396.03 396.03 396.03 396.03 396.03
90.0000 396.03 396.03 396.03 396.03 396.03
91.2500 396.03 396.03 396.03 396.03 396.02
92.5000 396.02 396.02 396.02 396.02 396.02
93.7500 396.02 396.02 396.02 396.02 396.02
95.0000 396.02 396.02 396.02 396.02 396.02
96.2500 396.02 396.02 396.02 396.02 396.02
97.5000 396.02 396.02 396.02 396.02 396.02
98.7500 I 396.02 396.02 396.02 396.02 396.02
100.0000 396.02 396.02 396.02 396.02 396.02
101.2500 396.02 396.02 396.02 396.02 396.02
102.5000 I 396.02 396.02 396.02 396.02 396.02
103.7500 ( 396.02 396.02 396.02 396.02 396.02
105.0000 396.02 396.02 396.02 396.02 396.02
106.2500 396.02 .396.02 396.02 396.02 396.02
107.5000 I 396.02 396.02 396.02 396.02 396.02
108.7500 396.02 396.02 396.02 396.02 396.02
110.0000 I 396.02 396.02 396.02 396.02 396.02
111.2500 396.02 396.01 396.01 396.01 396.01
112.5000 I 396.01 396.01 396.01 396.01
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