SW4130401_HISTORICAL FILE_20130405

STORMWATER DIVISION CODING SHEET
POST-CONSTRUCTION PERMITS
PERMIT NO. SW oik,W0(
DOC TYPE ❑ CURRENT PERMIT
❑ APPROVED PLANS
yiHISTORICAL FILE
DOC DATE �013 0/7/0,
YYYYMMDD

PA1MOUNTE : :
N G I N E E R I N G . I N C.
.l L, APR — 4 2013 ill
5 9 1 1 OLEANDER D R I V E , SUITE 2 0 1: H
VC I L M I N G T O N , NC 2 8 4 0 3
9 1 0 - 7 9 1 - 6 7 0 7 ( O ) 9 1 0 - 7 9 1 - 6 7 6 0 ( F )
LETTER OF TRANSMITTAL __
To: NCDENR - DWQ Date 4/3/13
f1 Mail Service Center
Raleigh, NC 27699-1617 Re: Jackson Square, Lexington NC
State Stormwater Submittal
Attn:' Mike Randall °Project`No.` ` 12229.PE
Ewe are sending: ® Originals ® Prints ❑ Shop Drawings ® Calculations
The following items: ❑ Correspondence ® Plans ❑ Specifications ® Other as listed below
r'.Qtiantity _ ,,Date, Dwg.No.: Description• -
2 24"x 36"Desigu Documents
1 Stormwater Narrative(w/ Calculations,Soils Info,etc.)
1 _ Original and Copy of SWU 101
] Original of SWU401 O&M Agreement
1 $505.00 check
Issue Status:I ® For Approval ❑ As Requested ❑ Construction ❑ Bid
❑ For Your Use ❑ For Review and Comment ❑Approved as Noted ❑ See Remarks
Action Taken: ❑ No Exceptions Taken ❑ Make Corrections Noted ❑ Amend&Resubmit
❑ Rejected-See Remarks ❑ Approved as Submitted ❑ Other
Remarks:
Cc: _ ' Signed:
Tim Clinkscales, PE, PLS
p@NOTEM
APR ... 5 1013
D7=NR - WATER.i3uAI..I7Y
; 'nth

Jackson Square
Davidson County, North Carolina
DESIGN AND STORMWATER NARRATIVE
Prepared for:
Southern Properties & Development, LLC
Prepared by:
PARA MQTJNTF
E N G. 1 N E E R 1 N G 1 N C.
5911 Oleander Drive, Suite 201
Wilmington, NC 28403
Project #12229.PP
March 2013
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JACKSON SQUARE
Lexington, NC
Davidson County, North Carolina
Project #12229.PE
Table of Contents
Design Narrative
Maintenance
Erosion and Sedimentation Control Specification
Calculations
Page i

JACKSON SQUARE
Lexington, NC
Davidson County, North Carolina
Project #12229.PE
DESIGN NARRATIVE
Southern Properties & Development, LLC proposes to develop 56 multi-family apartments on 4.67 acres
at 300 Forest Hill Road in Lexington, NC. The project is located approximately 0.10 miles south of the
intersection of Mocksville Road (Hwy 64)and Forest Hill Road in Lexington within Davidson County.
The site currently drains to an unnamed tributary Michael Branch C [12-113-3] within the Yadkin-Pee Dee
River Basin. The site currently consists of a combination of woods and grassed areas behind the
constructed Rite Aid at the corner of Mocksville and Forest Hill Road. The site is bound by Forest Hill
Road to the east, existing property to the south, Mocksville Road to the north, and US 52 and woods to
the west. The stormwater will be controlled by sheet flow in the parking lot to a stormdrainage system
that flows and is treated in a wet detention pond. Based on site constraints, the pond is being designed
with retaining walls above and below the vegetative shelf. The pond is designed for 85% TSS removal
and the outlet pipe has been armored with the necessary rip rap to maintain velocities below the 2 fps
threshold for erosive levels. The runoff will be controlled in the ponds through the use of outlet
structures for primary control and spillways for greater rainfall events.
The impervious area was calculated by taking into the account the roadways, sidewalks, and the 56 units.
Currently the wetland impact permitting is taking place which is the reason for a state stormwater permit
to be required since city of Lexington and Davidson County not an area that currently such a permit.
MAINTENANCE
Contractors shall be responsible for periodic inspection and maintenance of all indicated erosion control
devices in accordance with the plans and specifications. In addition, inspection and any necessary
maintenance will be required immediately following any significant storm event. Any erosion control
measure that fails to function as intended shall be repaired immediately. Upon completion of
construction and the establishment of stabilized ground cover, the property owner shall be responsible
for any ongoing site maintenance.

EROSION AND SEDIMENTATION CONTROL SPECIFICATION
PART 1 -GENERAL
1.1 RELATED DOCUMENT
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 WORK INCLUDED
A. Contractor shall take every reasonable precaution throughout construction to prevent the
erosion of soil and the sedimentation of streams, lakes, reservoirs, other water impoundments,
ground surfaces, or other property as required by State and Local regulations.
B. Contractor shall, upon suspension or completion of land-disturbing activities, provide
protection covering for disturbed areas. Permanent vegetation shall be established at the earliest
practicable time. Temporary and permanent erosion control measures shall be coordinated to
assure economical, effective, and continuous erosion and sediment control throughout the
construction and post construction period.
1.3 RELATED SECTIONS
A. Related Sections—The following Sections contain requirements that relate to this Section:
1. 01011 — Existing Underground Utilities
2. 01015—Special Conditions for this Contract
3. 01070—Shop Drawings, Project Data &Samples
4. 02200— Earthwork, Excavation Trenching, and Backfilling
5. 02230---Site Clearing
6. 02240—Dewatering
7. 02485—Seeding General Areas
1.4 REGULATORY REQUIREMENTS
A. Contractor shall be responsible for prevention of damage to properties outside the construction
limits from siltation due to construction of the project. The Contractor will assume all
responsibilities to the affected property owners for correction of damages that may occur.
Erosion control measures shall be performed by the Contractor, conforming to the requirements
of, and in accordance with plans approved by applicable state and local agencies and as per the
erosion control portion of the construction drawings and these specifications. The Contractor
shall not allow mud and debris to accumulate in the streets. Should the Contractor pump water
from trenches during construction, appropriate siltation preventative measures shall be taken
prior to discharge of pumped water into any storm drain or stream.
PART 2- PRODUCTS
2.1 Open mesh biodegradable mulching cloth.
2.2 Fertilizer shall be 10-10-'10 grade or equivalent.

•
2.3 Lime shall be dolomitic agricultural ground 1 limestone containing not less than 10 percent
magnesium oxide.
2.4 Phosphate shall be 20 percent super phosphate or equivalent.
2.5 Provide grass seed mixture as shown on the plans.
2.6 Silt fence shall consist of non-biodegradable filter fabric (Trevira, Mirafi, etc.) wired to
galvanized wire mesh fencing and supported by wood or metal posts.
2.7 NCDOT Class 13 stone for erosion control.
PART 3- EXECUTION
3.1 CLEARING
A. Clearing and grubbing shall be scheduled and performed in such a manner that subsequent
grading operation and erosion control practices can follow immediately thereafter. Excavation,
borrow, and embankment operations will be conducted such that continuous operation. All
construction areas not otherwise protected shall be planted with permanent vegetative cover
within 15 working days after completion of active construction. All slopes shall be planted
within 21 calendar days after completion of such activity.
3.2 STABILIZING
A. The angle for graded slopes and fills shall be no greater than the angle that can be retained by
vegetative cover or other adequate erosion control devices or structures. All disturbed areas not
to be paved and left exposed will, within 14 calendar days of completion of any phase of
grading, be planted or otherwise provided with either temporary or permanent ground cover,
devices, or structures sufficient to restrain erosion. Al! slopes steeper than 3;1 shall be be
planted or otherwise provided with either temporary or permanent ground cover, devices, or
structures sufficient to restrain erosion within 7 calendar days.
3.3 REGULATORY REQUIREMENTS
A. Whenever land disturbing activity is undertaken on a tract, a ground cover sufficient to restrain
erosion must be planted or otherwise provided within 14 calendar days on that portion of the
tract upon which further active construction is to being undertaken.
13. If any earthwork is to be suspended for any reason whatsoever for longer than 14 calendar
days, the areas involved shall be seeded with vegetative cover or otherwise protected against
excessive erosion during the suspension period. Suspension of work in any area of operation
does not relieve the Contractor of the responsibility for the control of erosion in that area.

PART 4-CONSTRUCTION PHASE
4.1 PRACTICES
A. Avoid dumping soil or sediment into any streambed or watercourse. Backfill for stream
crossings shall be placed dry and compacted to minimize siltation of the watercourse, where
applicable.
B. Maintain an undisturbed vegetative buffer where possible between a natural watercourse and
trenching and grading operations.
C. Avoid equipment crossings of streams, creeks, and ditches where practicable.
PART 5-SEDIMENT CONTROL FEATURES
5.1 GENERAL
A. All devices (silt fences, retention areas, etc.), for sediment control shall be constructed at the
locations indicated prior to beginning excavation on the site. All devices shall be properly
maintained in place until a structure or paving makes the device unnecessary or until directed
to permanently remove the device.
5.2 DESIGN APPLICATIONS
A. Mulch shall be used for temporary stabilization of areas subject to excessive erosion, and for
protection of seed beds after planting where required.
1. Jute, mesh, etc. should be installed as per manufacturer's instructions.
5. Silt fences shall be used at the base of slopes and in drainage swales to restrict movement of
sediment from the site.
C. Riprap shall be used at the proposed outfall pipes as indicated on plans.
D. Establish vegetative cover on all unpaved areas disturbed by the work.
1. Preparation of Seedbed. Areas to be seeded shall be scarified a depth of 6 inches until a
firm, well-pulverized, uniform seedbed is prepared. Lime, phosphorous, and fertilizer
shall be applied during the scarification process in accordance with the following rates.
a. Lime—2 ton per acre
b. Nitrogen—100 pounds per acre
c. P205—200 pounds per acre
2. Seeding. Disturbed areas along roads and ditches shall be permanently seeded with 10-20
pounds per acre of centipede during the period from March through September. Seeding
performed during the period from April to August shall be temporarily seeded with 40
pounds per acre of German Millet. The permanent vegetative cover will be over seeded at
the earliest possible time as specified above.
3. Mulch all areas immediately after seeding. Mulch shall be applied and anchored as
specified hereinbefore.

5.3 MAINTENANCE
A. The Contractor shall be responsible for maintaining all temporary and permanent erosion
control measures in functioning order. Temporary structures shall be maintained until such
time as vegetation is firmly established and grassed areas shall be maintained until completion
of the project. Areas which fail to show a suitable stand of grass or which are damaged by
erosion shall be immediately repaired.
5.4 REMOVAL OF SEDIMENT CONTROL DEVICES
A. Near completion of the project, when directed by the Owner's agent, the Contractor shall
dismantle and remove the temporary devices used for sediment control during construction.
All erosion control devices in seeded areas shall be left in place until the grass is established.
Seed areas around devices and mulch after removing or filling temporary control devices.
END OF SECTION 02410

CALCULATIONS

PA.RA M:o UNTE
Project Name: Jackson Square
Client: Tom Honeycutt
Project Number: 12229.PE
Prepared By: WUF
Date: 3/27/13
Basin: DA #1 [PRE] Drainage Area = 4.66 Ac.
Soil Type Area (Ac.) HSG: % of Basin
Cecil sandy loam 1.95 A 41.85
Pacolet sandy loam 2.71 B 58.15
Sum: 4.66 100.00
HSG: % of Basin
A 41.85
B 58.15
C 0.00
D 0.00
Sum: 100.00

o l) -, ®: 1 4 1 k f. E : DATE DESIGN PHASE I
s SfGN�,:- :•-. .. i, r*. !: . x �, 03/13/13 PRELIM
PROJECT NAME PROJECT NO CONSTR X
Jackson Square Apartments REVISION
LOCATION BY RECORD
Lexington, NC JAR OTHER
ADDITIONAL INFORMATION CHECKED BY (SPECIFY)
I-MG
Storm Outlet Structure
Pipe No.= 1 Discharge Offsite Q1o/Qfull = 0.65
Pipe Dia= 24 in VIVfuII = 1.07
Qio= 14.61 cfs V= 7.7 fps
Qfull = 22.62 cfs
Vfull = 7.19 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D50 = 8 in
DMAX = 12 in
E Riprap Class = B
u Apron Thickness = 18 in
5- 8 g La, Apron Length = 12.0 ft
d A, Upstream Width = 3xDia = 6 ft
La,Length W, Downstream Width = 14 ft
Outlet Velocity Dissipator PAGE 1 OF 1

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Jackson Square
NC DENR Retention Requirements
Objective:design a wet detention basin with the following characteristics:a permanent water pool depth between 3-and
6-feet, a surface area that meets TSS removal requirements(values set by NC DENR and included here), a forebay that
is approximately 20%of the total pond volume, a temporary water pool sized to detain the initial 1.0 inch of rainfall runoff, an
outlet device that drains the temporary water pool within 2-5 days.
Step 1: Determine the surface area required for 85% TSS removal
Post-Development Conditions
Total Drainage Area 4,66 ACRE Value from CAD
Impervious Drainage Area 1.87 ACRE Value from CAD
Impervious Cover 40.1% Impervious Cover-(impervious Drainage
Area)/(Total Drainage Area)'100%
Elevation of Permanent Pool Surface 755.0 FT Value selected by designer
Depth of Permanent Pool 5.0 FT Value selected by designer
Elevation of Wet Detention Pond Bottom 750.0 FT (Bottom Elevation)=(Permanent Poo!Surface
Elevation)-(Depth of Permanent Pool)
Approximate Pond Length 85 FT Value from CAD
Approximate Pond Width 38 FT Value from CAD
Length:Width Ratio 2:1 Ratio=(Length)/(Width):?
Reguired SA/DA Ratio for 85%TSS Removal 1.25 Value from chart. Reference:85% TSS Removal
Required Permanent Pool Surface Area 2,537 SF Required Surface Area=(Required SA/DA
Ratio)"(Total Drainage Area) •
Provided Permanent Pool Surface Area 2,578 SF Interpolated value from stage-storage calculations
Step 2: Determine the 1-inch runoff elevation within the wet detention pond.
Runoff Coefficient, Rv 0.411 IN/IN Rv=0.05+0.009'(%Impervious)
Required 1.0"Runoff Volume(Volume of 1.0"Runoff Volume=1.5 inch"Rv'1 foot/12
Temporary Pool) 6,955 CF inch"(Total Drainage Area)
Volume Below Permanent Pool 6,554 CF Value from stage-storage calculations(cumulative
pond volume at permanent pool elevation)
Total Volume to be Controlled 13,509 CF Total Volume to be Controlled=(Volume Below
Permanent Pool)+(1.5"Runoff Volume)
Storage Elevation at Required Volume 756.86 FT Value is interpolation based upon stage-storage
values. See stage-storage calculations

Step 3: Calculate the required forebay volume(18-22%of total pond volume)and compare to the fore bay volume provided.
Total Pond Volume 6,554 CF Value from stage-storage calculations
Required Total Forebay Volume 1,311 CF Forebay Volume=(Total Pond Volume)`20%
Provided Total Forebay Volume 1,213 CF Value from stage-storage calculations
Provided Forebay Volume:Total Pond Volume 19% (Provided Forebay Volume)/(Total Pond
Volume)"100
Step 4: Verify that time required to drawdown the 1-inch runoff volume is within 2 to 5 days.
Diameter of Proposed Low-flow Orifice 1.00 IN Value chosen by designer
Elevation of Outlet Structure 755.00 FT Value chosen by designer
Total Elevation Head Above Orifice 2.40 FT (Total Elevation Head Above Orifice)=(Weir
Elevation)-(Elevation of Permanent Pool Surface)
(Average Elevation Head Above Orifice)=((Storage
Elevation at Required Volume)+(Elevation of
Average Elevation Head Above Orifice 0.80 FT Permanent Pool Surface)]/3-(Storage Elevation at
Required Volume)
Cd,Coefficient of Discharge 0,60 Value chosen by designer
O, Flowrate Through Low-flow Orifice 0.02 CFS Q=Cd`(Pi)`j(1?iameter of Orifice)(1 ft/12
in)] 2/4 (2`32.2*(Average Head)] 1/2
Drawdown Time for 1-inch Runoff 3.43 DAYS (Drawdown Time)=(1.5"Runoff Volume)/Q`(i
day/86400 seconds)

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USDA Natural Resources Web Soil Survey 11/6/2012
its Conservation Service National Cooperative Soil Survey Page 1 of 4

North Carolina Secretary of State https://www.secretary.state.nc.usfcorporations/Corp.aspx?Pitemld=9659289
2:7
,,,.,., i., . North Carolina
( , Elaine F. Marshall DEPARTMENT OF THE
,,..„_ Secretary SECRETARY OF STATE
4404 ,,,,o•'` PO Box 29622 Raleigh.NC 27626-0622 [phone]
Account Login Register
Date: 4/3/2013
Click here to-
View Document Filings I File an Annual Report I
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Corporation Names
Name Name Type
NC SOUTHERN PROPERTIES& LEGAL
DEVELOPMENT LLC
Limited Liability Company Information
SOSID: 1181867
Status: Current-Active
Effective Date: 1 2129/2 0 1 0
Citizenship: DOMESTIC
State of Inc.: NC
Duration: PERPETUAL
Annual Report Status: CURRENT
Registered Agent
Agent Name: HONEYCUTT,THOMAS W
Office Address: 644 BISCOE ROAD
TROY NC 27371
Mailing Address: PO. BOX 504
TROY NC 27371
Principal Office
Office Address: 644 BISCOE-ROAD
TROY NC 27371
Mailing Address: P.O.BOX 504
TROY NC 27371
Officers
Title: MANAGER .
Name: THOMAS W.HONEYCUTT
Business Address: P.O BOX 504 • - -• •
TROY NC 27371 • • - _
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North Carolina Secretary of State https://www.secretary.state.nc.us/corporations/Corp.aspx?PitemId=9659289
•
Title: MANAGER
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Name: BRIAN D.SMITH
Business Address: 10255 BEACH DRIVE
CALABASH NC 28467
This website is provided to the public as a part of the Secretary of State Knowledge Base(SOSKB)system.Version:
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