SW6111101_HISTORICAL FILE_20111216

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT. NO.
SW44��
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

RE: SW6111101 - Wedgefield Subdivision Ph. II - Additional Information
Request
Patterson, Robert
Sent:Friday, December 02, 2011 8:05 AM
TO: Tom Goodwin [[e-mail]]
Cc: Frank Wanko [[e-mail]]
Tom - That is fine. Please send it by December 16, 2011.
Thanks
Robert
From: Tom Goodwin [[e-mail]]
Sent: Friday, December 02, 2011 8:01 AM
To: Patterson, Robert
Cc: Frank Wanko
Subject: RE: SW6111101 - Wedgefield Subdivision Ph. II - Additional Information
Request
Thanks Robert. I am out of town until Dec 12th. Can it wait until I return? If not I
can make arrangements to have it shipped to me to sign.
tom
-----Original Message -----
From: Patterson, Robert [mailto:[e-mail]]
Sent: Fri 12/2/2011 7:51 AM
To: Tom Goodwin
Cc:
Subject: SW6111101 - Wedgefield Subdivision Ph. II - Additional Information
Request
Tom,
Everything you submitted with the revised offsite info looks good. However, the
revised calculations need to be sealed, signed and dated. You can email that to me
if its easier. Once I get that I'll be able to issue it.
Thanks
Robert D. Patterson, PE
Environmental Engineer
NCDENR I DWQ I Stormwater Permitting
1617 Mail Service Center, Raleigh, NC 27699-1617 (Mail) 1 512 N. Salisbury St,
Raleigh, NC 27604 1 9th Floor (Location & Parcels)
[phone] Phone [phone] Fax I [e-mail] Email I
http://portal.ncdenr.org/web/wq/ws/su Website
Before printing this email, please consider your budget and the environment.
E-mail correspondence to and from this address may be subject to the North Carolina
Public Records Law and may be disclosed to third parties unless the content is
exempt by statute or other regulation.

IURCH
NJ C O CONSUL
TINGFNGINEE S ASSOC/AYES
CONSUL--/NG F.NC/NEERS
P.O. BOX 1737
300 SOUTH WEST BROAD STREET
SOUTHERN PINES, NORTH CAROLINA 28387
PHONE: I-(910)-692-5616
FAX: [phone]
To: NCDENR -DWQ
Stomtwater Permitting Unit
512 N. Salisbury St.
Raleigh, NC 27604
The Following Itcm(s) :
LETTER OF TRANSMITTAL
Date: 12/13/201 I JJob No. HC101I
Ann. Robert Patterson, PE
Ref: Wed efield Phase II Stormwater
We are sending you
Attached
O Under separate cover. VIA
l� Shop Drawings O Prints O Samples
O Copy of Letter 0 Change Order O
O Specifications
Copies
Date
Project No.
Description
2
One Original and one copy of sealed revised calcs.
These arc Transmitted as Checked Below :
O For Approval O Approved as Submitted
O For Your Use O Approved as Noted
l� As Requested O Returned for Corrections
0 For Review and Comment O
Remarks:
O Resubmit for Approval
O Submit for Distribution
r-= Return Corrected Prints
O Prints Returned After Loan to Us
Copy To:
Signed: \I — — `-' `C,
Frank Wanko, Project Designer
p@m0no
DEC 1 4 2011
DENR -WATER QUALITY
WETLANDS AND STORMWATER BRANCH

Hobbs Upchurch Associates
c+nglnnering I planning 1 surveying
November 29, 2011
NCDENR — DWQ
Stormwater Permitting Unit
512 N. Salisbury St.
Raleigh, NC 27699-1617
Attn: Robert D. Patterson, PE
Re: Wedgefield Phase II
HUA Job #HC1011
Dear Mr. Patterson,
In reference to your emailed comments from November 18, 2011, the following are the
responses to those comments made by your office for the above named project and our
responses are as follows:
1. The application and plans state that the BUA in the off -site DA's is zero. Added in
the existing BUA on the impervious calculations on the plan and application.
2. Future build out must be estimated and BUA included for the currently undeveloped
off -site area being routed to the pond. Added in the future BUA on the
impervious calculations on the plan and application.
If you should have any questions or concerns during your review, please do not hesitate to
contact this office.
Sincerely,
HOBBSS,, UPCHURCH & ASSOCIATES, P.A
Thomas K. Goodwin, P.E.
Division Manager
Transportation and Site Development Division
T: 910,692,5616 1 F: 910.692.7342 1 300 SW BROAD STREET I SOUTHERN PINES, NO 28388 1 WWW.HOBBSUPCHURCH.COM
SUPERIOR PERFORMANCE THROUGH INNOVATIVE DESIGN

�� CONSUL
UGENGINH&ASSOCIATES LETTER OFTRANSMITTAL
No. C101I
CONSULT/NG ENGINEERS Date: II/29/2011 Job No. HC1011
P.O. BOX 1737 Ann. Robert Patterson, PE
300 SOUTH WEST BROAD STREET Ref: Wedge eld Phase II
SOUTHERN PINES, NORTH CAROLINA 28387 Stomtwater Permit
PHONE: I-(910)-692-56I 6
FAX: [phone]
To: NCDENR - DWQ We are sending you
Stormwater Permitting Unit ® Attached
512 N. Salisbury St O Under separate cover VIA
Raleigh, NC 27699-1617
The Following [tem(s) :
O Shop Drawings O Prints r-----] Samples
O Copy of Letter O Change Order t�
NOV 3 0 2011
DENR-WATER QUALITY
SpecifidAtiNUMSAND STORMWATER BRANCH
Copies
Date
Project No.
Description
2
Revised Ma
2
Revised Application
2
Revised Calculations
These are Transmitted as Checked Below :
O For Approval O Approved as Submitted
O For Your Use o Approved as Noted
t� As Requested O Returned for Corrections
O For Review and Comment O
Remarks:
O Resubmit for Approval
O Submit for Distribution
O Return Corrected Prints
O Prints Returned After Loan to Us
Copy To:
Signed:
IJ

Application Completeness Review
tY First Submittal ❑ Re -Su
Development/Project Name:
Receiving stream name S•
River Basin: CA „� r-
Date Reviewed: 11 5 1 By Bill Diuguid
For post -construction requirements, a program will be deemed compliant for the areas where it is
implementing any of the following programs: WS-I, WS-II, WS-III, WS-IV, HOW, ORW, Neuse River Basin
NSW, Tar -Pamlico River Basin NSW, and the Randleman Lake Water Supply Watershed Nutrient
Management Strateay.
T&E Species (Goose Creek, Waxhaw Creek
Latitude and Longitude:36 O 2 O
Project Address: 3 CAT 1I
Engineer name and firm:^,,,, A K Geod.
Is the project confirmed to be in the St
❑ Low Density (no curb and gutter)
h(�p �401/404 impacts to surface waters
f2- B U A 3/_327.
Gr Check for $505.00 included
R,' Original signature not ho
Legal signature Corporation-VP/h
Check
GFeek Water Sheds):
:e MSI StormMiater PernlR jurisdiction72'Yes or ❑ No
❑ Low Density with curb and gutter outlets 2'Agh Density . ❑ Other
wetlands, and buffers (add language to cover letter and/or add info letter)
ip-General Partner/higher, LLC-member/manager, Agent).
If an agent signs the application, a signed letter of authorization from the applicant must be provided which
includes the name, title, mailing address and phone number of the person signing the letter.
:or subdivided projects, a signed and notarized deed restriction statement
� ealed, signed & dated calculations
Correct supplement and O&M provided for each BMP,on site (check all that were provided & number of each)
µy7, :i'.
❑ Bioretention ❑ Rooftop Runoff Management
❑ Dry Detention Basin ❑ Sand Filter
❑ Filter Strip
❑ Grass Swale
❑ Infiltration Basin
❑ Infiltration Trench
❑ Level Spreader
❑ Permeable Pavement
❑ Restored Riparian Buffer
❑ Stormwater Wetland
lH'Wet Detention Basin
❑ Low Density
❑ Curb Outlet
❑ Off -Site
❑ NCDOT Linear Road
5�o sets of sealed, signed & dated layout & finish grading plans with appropriate details
rrative Description of stormwater management provided
:Soils report provided
Wetlands delineated or a note on the plan's:br;fnrthe accompanying documents that none exist on site and/or
o/acent property a:
etails for the roads, parking area, cul-de-sac radii, sidewalk widths, curb and gutter;
ai Oimensions & slopes provided
Drainage areas delineated ❑ Pervious and impervious reported for each ❑ Areas of high density
MP operation and maintenance agreements provided
Application complete ❑ Application Incomplete Returned: (Dale)
Comments
May 5, 2011 Revision, Bill Diuguid

NJ C O CONSULTING
U G ENGINEERS
&ASSOCIATES
CONSULT/NG ENGINEERS
P.O. BOX 1737
300 SOUTH WEST BROAD STREET
SOUTHERN PINES, NORTH CAROLINA 28387
PHONE: [phone]
FAX: [phone]
To: NCDENRR -DWQ
2728 Capital Blvd.
Raleigh, NC 27604
The Following Item(s) :
LETTER OF TRANSMITTAL
Date: II/3/2011 JJobNo. HC1011
Attn. Stormwater Permitting Section
Ref.: Wed etield Subdivision Phase
We are sending you
® Attached
Under separate cover VIA
O Shop Drawings O Prints Samples
E-�— Copy of Letter O Change Order t�
O Specifications
Copies
Date
Project No.
Description
I
Stormwater Permit Check
2
Original and copy of Permit Application
2
Original and copy of O&M Agreement
2
Original and copy of Deed Restricitons
2
Original and copy booklet of Permit Information
2
Original and copy booklet of Calculations
2
Sets of Plans
These are Transmitted as Checked Below :
O For Approval
O Approved as Submitted
=---I Resubmit for Approval
0 For Your Use
O Approved as Noted
O Submit for Distribution
O As Requested
O Returned for Corrections
O Return Corrected Prints
0 For Review and Comment O
O Prints Returned After Loan to Us
Remarks:
we^ ANDS 'An ST61pmolgpp 2RAQ1611
Copy To: Signed: �I
Frank Wanko, Project Designer

Sc✓6illl0/
REVISED
Wet Detention Basin
Computations
For
Wedgefield Subdivision Phase 2
Hoke County, North Carolina
�N
4f
12075
� INS
K. C'O�
Prepared by:
Hobbs, Upchurch & Associates, P.A.
300 S.W. Broad Street
Southern Pines, NC 28387
December, 2011

Wet Pond Supporting Calculations
Peak Inflow Calculations
Pre"development'Im"eivious Perdenta a
2.39%
Post de%elo�ment lin' ervious Percenta e.
540,356 SF
Post develo ment%Iff eivious Percenta e
30.82%
m Pre-develo ent:Run-off Coefficient C>
0.31
Post=develo ment'Rdh-off Coefficient C')
0.48
Rainfall Depth Rd
1.0 in
1 r, 24 hrrainfall intensity" I
0.13 in/hr
Pre -development t-yr, 24-hr peak flow (Q)
0 = C*ItA„ ;, Q =
1.64 ft3/sec
Post -development 1-yr, 24-hr peak flow (0)
Q = 6'-1 A Q -
2.54 ft3/sec
Storage Volumes: Non SR Waters Calculations
Rv ,:05+.9'(impervious,.(ac)/DA (ac)):
Rv =
0.327
Volume required = 3630' Rd ` Rv' A
v =
47831.80 ft
Draina e.Area •A'. v
1,753,223 SF
40.25 Acres
Pre develo �riientlm eiyiousArea
41,880 SF
0.96 Acres
Estunat'e`drFuture(Irn` ervious'Area
25,000 SF
0.57 Acres
Post;de""veto inept m' ervious,Area
473,476 SF
10.87 Acres

WEDGEFIELD—PHASE II
BUILT -UPON AREA COMPUTATIONS:
August 11, 2011 (rev Nov. 21, 2011)
Sidewalks: 27,697 sq. ft
Streets/Curb& Gutter: 160,179 sq. ft
Estimate Building/Lot: 2,800 sq. ft/lot x 102 lots = 285,600 sq. ft.
Total Estimated Project Built -Upon Area: 473,476 sq. ft = 10.88 acres
Total Project Area: 36.27 acres
Proposed Project BUA Estimate: 30.00 % (Within Property/Project Area)
Total Drainage Area: 1,753,223 sf : 40.25 acres
On -Site Drainage Area: 1,529,221 sf : 35.11 acres
Off -Site Drainage Area: 224,002 sf : 5.15 acres
Existing Impervious Areas: 41,880 sf = 0.97 acres
Estimated Future Impervious Areas: 25,000 sf = 0.57 acres
Estimated Proposed Impervious Areas: 473,476 sf = 10.88 acres
Total Impervious Within Drainage Area: 540,356 sf : 12.42 acres
Total Impervious Area Percentage of Drainage Area: 30.82 %
Project's Impervious Area Within Drainage Area: 27.03%

STORMWATER BMP.
ale
„-
,4
w aN1
�4 F,
�
r.�
rkr
>i
,r^
�t
r �±
it
a +
m°
rn'.'
2'
LJ
3
m
o
U,
711C
RMWATERBMP
-
�)
WEDGEFIELD -WET DETENION BASIN # 1 VOLUME COMPUTATIONS
MINIMUM VOLUME REQUIRED.
USE SIMPLE METHOD, COMPARE TO DISCRETE SCS METHOD
Treatment Volume:
Control and treat the first 1.0 Inches of rein
Additional Requirements:
No additional requirements
Watershed Size: 40.26 acres
' Percent Impervious Area: 30.82 % Total Composite CN 66.87
Impervious Area:
12.405 acres
Pervious Area:
27.845 acres 'Percent impervious from built upon
area calculations within drainage area
Water Quality Storm:
1.0 inch
Hydrologic Soil Group: Mostly A (Varies, See Composite HSG Computations)
Pervious Land Use CN: 53 (See Pre -Developed Composite CN Computations)
Impervious Land Use CN:
98
URUNOFF�DETERMINATION:
NCDENR Stormwater BMP Manual Section 3.3 h
Discrete SCS Method
PRECIPITATION (P):
1.00 inches (Water Qualify Storm)
BREAKDOWN OF SOIL STORAGE (S):
Formula: 5=1000/CN-10
Impervious (S):
0.204 inches
Pervious (S):
8.868 inches
BREAKDOWN OF RUNOFF (R/O):
Formula: R/0=(P-0.2'S)` /(P+0.8`S)
Impervious (R/0):
0.791 inches
Pervious (R/O):
0.074 inches
I
BREAKDOWN OF'FIRST FLUSH' (V):
Formula: V=Area`Runolf Depth
Impervious (V):
9.811 acre -inches
Pervious (V):
2.069 acre -inches
TREATMENT VOL. REQUIRED (VTasAT):
Formula: VTREAT, Impervious V +Pervious V
(Vra�,T):
11.870 acre -inches
(Vraewr):
43,088 fts
Simple Method
la:
0.3082 (Impervious traction)
Ro:
1.0 in (Water Qualify Storm)
A:
40.26 acres (Watershed Area)
RUNOFF COEFFICIENT (Rv):
Formula: R v=0.05+0.9`I a
R,:
0.32738
TREATMENT VOL. REQUIRED (VTREAT):
Formula: V sear=Ro `Rv `A
(VTIIEAT):
47,633 fts
(VTa�T):
13.177 acre -inches
USE: (VTREAT��
13.177 acre -inches