SW8051045_HISTORICAL FILE_20190401

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO
SW8 051045
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
EX HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
ZO19 014 U l
YYYYMMDD

/ ROY COOPER
Governor
MICHAEL S REGAN
Secretary
S DANIEL SMITH
Interim Director
April 1 2019
NORTH CAROLINA
Environmental Quality
KG Plaza, LLC
Ann Mr Jack J Carlisle, Manager
8620 River Road
Wilmington, NC 28412
Subject Permit Modification and Request for Permit Renewal
State Slormwater Management Permit No SW8 051045
The Reserve at Palmetto Creek
High Density Subdivision Project
Brunswick County
Dear Mr Carlisle
The Wilmington Regional Office received a complete modified State Stormwater Management Permit
Application for the subject project on March 28 2019 Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A
\'CAC 2H 1000 effective January 1, 2017 We are forwarding modified Permit No SW8 051045 dated April
1, 2019, for the construction, operation and maintenance of the stormwater control measures (SCMs) built -
upon areas, as well as the stormwater collection system and/or vegetated conveyance system associated with
the subject project Please replace the previously approved plan sheets with the attached modified and
approved versions Please replace the previous application documents with the enclosed versions/ electing
this modification
Permit Modification
The following modifications are included and covered by this permit
1 Pond 1 This pond was previously permitted under the 1995 rules, and it has been redesigned under
the 2017 rules because the impervious area increased It has also been reallocated as summarized in
Attachment C
2 Ponds 2 and 3 The impervious area in Pond 2 was reallocated as summarized in Attachment C, but
the previously -permitted total did not increase there was no change to Pond 3
Request for Permit Renewal
This permit shall be effective from the date of issuance until April 21, 2020 A renewal application is to be
submitted six months prior to that date which is October 21, 2019 Please submit the renewal application in
the near future It shall be subject to the conditions and limitations as specified therein, and does not supersede
any other agency permit that may be required Please pay special attention to the permit conditions regarding
the operation and maintenance of the SCMs, stormwater collection system, and/or vegetated conveyances, the
limitation of built upon area, modification of the project the procedures for changing ownership of and/or
transferring the permit, and the need to renew the permit Please also pay attention to the permit conditions
that requires the recordation of deed restrictions and protective covenants, easements, and the maintenance
agreement, which must all be provided along with certification upon completion of the project Failure to
comply with these requirements will result in future compliance problems
if any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH)
The written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed
with the OAH within thirty (30) days of receipt of this permit You should contact the OAH with all questions
regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service
Center, Raleigh, NC 27699-6714, or via telephone at 919-431 3000 or visit their websrte at
www NCOAH corn Unless such demands are made this permit shall be final and binding
®� North Carolina Department of Environmental Quality I Division of Energy Mineral and Land Resources
Wilmington Regional Office 1127 Cardinal Drive Extension I Wilmington North Carolina 28405
rvamNcumurv. ` —�
9107967215

State Storm water Permit \c SWS 051045
Page 2 of 2
If you have any questions or need additional information concerning this matter please contact Kelly Johnson
in the Wilmington Regional Office at [phone]
Sincerely
Da,nI& th, Interim Director
Division of Energy Mineral and Land Resources
enclosures Attachment A Certification Forms for Pond 2 and 3
Attachment B Certification Form for Pond 1
Attachment C Impervious Allocation Summary
Application Documents
GDS/kpl \\\Stormwater\Permits & Projects\2005\051045 HD\2019 04 permit 051045
cc Mr Phil Trill PE, Tripp Engineering
419 Chestnut Street Wilmington NC 28401
Inspector Brunswick County Building Inspections
Brunswick County Engineering
Wilmington Regional Office Stormwater File

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143 General Statutes of North Carolina as
amended and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
KG Plaza, LLC
The Reserve at Palmetto Creek
Palmetto Creek Way, Bolivia, Brunswick County
FOR THE
construction, operation and maintenance of three wet detention ponds in compliance with the
provisions of 15A NCAC 2H 1000 effective September 1, 1995 (Ponds 2 and 3) and 15A NCAC 2H
1000 effective January 1 2017 (Pond 1) (hereafter referred to as the "stormwater rules') and the
approved stormwater management plans and specifications and other supporting data as attached
and on file with and approved by the Division of Energy Mineral and Land Resources (DEMLR) and
considered a part of this permit
This permit shall be effective from the date of issuance until April 21, 2020 and shall be subject to the
following specified conditions and limitations
I DESIGN STANDARDS
1 This permit is effective only with respect to the nature and volume of stormwater described in
the application and other supporting data
2 This stormwater system has been approved for the management of stormwater runoff as
described in Section 1 5 of this permit
3 Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit
4 All stormwater collection and treatment systems must be located in either dedicated common
areas or recorded easements The final plats for the project will be recorded showing all such
required easements, in accordance with the approved plans

5 The following design elements have been permitted for the wet detention pond stormwater
facilities and must be provided in the systems at all times
Design Criteria
Pond #1
Pond #2
Pond #3
a Drainage Area acres
Onsile ft2
Offsite W
853
371 715
None
1583
689 745
None
1056
460 070
None
b Total Impervious Surfaces ft2
(See Attachment C)
237 076
320,310
l
181 312
c Design Storm inches
1 5
10
1 0
d Pond Depth feet
5
5
5
e TSS removal efficiency
90
90
90
f Permanent Pool Elev FMSL
370
300
220
g Perm Pool Surface Area ft2
46 054
51 690
14 219
h Permitted Storage Volume ft3
53437
53 108
21 226
i Temporary Storage Elev FMSL
380
31 0
2335
l Controlling Or face 0 pipe
l!ed
25
20
20
k Perm Forebay Volume ft3
31,365
52 073
9 189
I Receiving Stream/River Basin
UT to Lockwoods Folly R / Lumber
m Stream Index Number
15 25 1 (11
n Classificaton of Water Body
Sc
o Max horsepowerfor afountain
3/4 _ 3/4 1/6
II SCHEDULE OF COMPLIANCE
1 No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (such as
swales) shown on the approved plans as part of the stormwater management system without
submitting a revision to the permit and receiving approval from the Division
2 The permittee Is responsible for verifying that the proposed built -upon area for the entire lot
Including driveways and sidewalks, does not exceed the allowable built -upon area Once the
lot transfer Is complete, the built -upon area may not be revised without approval from the
DEMLR, and responsibility for meeting the built -upon area limit Is transferred to the Individual
property owner
3 If an Architectural Review Board or Committee is required to review plans for compliance with
the BUA limit the plans reviewed must include all proposed built -upon area Any approvals
given by the Board do not relieve the homeowner of the responsibility to maintain compliance
with the permitted BUA limit
4 The permlttee shall submit to the Director and shall have received approval for revised plans,
specifications, and calculations prior to construction, for any modification to the approved
plans, including, but not limited to, those listed below
a Any revision to the approved plans, regardless of size
b Protect name change
c Transfer of ownership
d Redesign or addition to the approved amount of built -upon area
e Further subdivision acquisition, or sale of all or part of the project area The protect area
is defined as all property owned by the permlttee, for which Sedimentation and Erosion
Control Plan approval or a CAMA Major permit was sought
f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan
The Director may determine that other revisions to the protect should require a modification to
the permit

1
6 The Director may notify the permittee when the permitted site does not meet one or more of
the minimum requirements of the permit Within the time frame specified in the notice the
permittee shall submit a written time schedule to the Director for modifying the site to meet
minimum requirements The permittee shall provide copies of revised plans and certification in
writing to the Director that the changes have been made
7 The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface
8 During construction, erosion shall be kept to a minimum and any eroded areas of the system
will be repaired immediately
9 Upon completion of construction, prior to issuance of a Certificate of Occupancy and prior to
operation of this permitted facility, a certification must be received from an appropriate
designer for the system installed certifying that the permitted facility has been installed in
accordance with this permit, the approved plans and specifications, and other supporting
documentation Any deviations from the approved plans and specifications must be noted on
the Certification
10 If the stormwater system was used as an Erosion Control device it must be restored to design
condition prior to operation as a stormwater treatment device and prior to occupancy of the
facility
11 Permanent seeding requirements for the stormwater control must follow the guidelines
established in the North Carolina Erosion and Sediment Control Planning and Design Manual
12 Prior to the sale of any lot, the following deed restrictions must be recorded
a The following covenants are intended to ensure ongoing compliance with State
Stormwater Management Permit Number SW8 051045 as issued by the DEMLR under
NCAC 2H 1000
b The State of North Carolina is made a beneficiary of these covenants to the extent
necessary to maintain compliance with the Stormwater Management Permit
c These covenants are to run with the land and be binding on all persons and parties
claiming under them
d The covenants pertaining to stormwater may not be altered or rescinded without the
express written consent of the State of North Carolina DEMLR
e Alteration of the drainage as shown on the approved plans may not take place without
the concurrence of the DEMLR
f The maximum built -upon area per lot is as follows
Single Family, Lots 1-60 4 000sf/lot
Townhomes, Lots 1-86 3,416sf/lot
This allotted amount includes any built -upon area constructed within the lot property
boundaries, and that portion of the right-of-way between the front lot line and the edge of
the pavement Built upon area includes, but is not limited to, structures, asphalt
concrete, gravel brick stone slate coquina and parking areas but does not include
raised, open wood decking, or the water surface of swimming pools
g Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their
allowable built -upon area due to CAMA regulations
h All runoff from built upon area on the lot must drain into the permitted system This may
be accomplished through providing roof drain gutters which drain to the street, grading
the lot to drain toward the street or grading perimeter swales and directing them into the
pond or street Lots that will naturally drain into the system are not required to provide
these measures
Built -upon area in excess of the permitted amount will require a permit modification

13 A copy of the recorded deed restrictions must be submitted to the Division within 30 days of
the date of recording the plat, and prior to selling lots The recorded copy must contain all of
the statements above the signature of the Permittee, the deed book number and page and
the stamp/signature of the Register of Deeds
14 Wet Pond Fountain
a Decorative spray fountains are allowed in the pond subject to the following criteria
i The minimum permanent pool volume is 30 000 cubic feet
u The fountain must draw its water from less than 2 below the permanent pool
surface
ui Separated units where the nozzle pump and intake are connected by tubing may
be used only if they draw water from the surface in the deepest part of the pond
IV The fountain may not be placed into the forebay
v The falling water from the fountain must be centered in the main pond away from
the shoreline
vi The maximum horsepower for a fountain in this pond is HP horsepower
b Decorative spray fountains will not be allowed in the stormwater treatment system, as
the permanent pool volume is less than 30 000 cubic feet
c Decorative spray fountains will not be allowed in the stormwater treatment system until
calculations are provided documenting the permeant pool volume is greater than
30,000 cubic feet
15 Prior to transfer of the permit, the stormwater facilities will be inspected by DI-Ml,R personnel
The facility must be in compliance with all permit conditions Any items not in compliance must
be repaired or replaced to design condition prior to the transfer Records of maintenance
activities performed to date will be required
16 The permittee shall at all times provide the operation and maintenance necessary to assure
that all components of the permitted stormwater system function at design condition The
approved Operation and Maintenance Plan must be followed in its entirety and maintenance
must occur at the scheduled intervals including but not limited to
a Semiannual scheduled inspections (every 6 months)
b Sediment removal
c Mowing and revegetation of side slopes
d Immediate repair of eroded areas
e Maintenance of side slopes in accordance with approved plans and specifications
f Debris removal and unclogging of structures orifice, catch basins and piping
g Access to all components of the system must be available at all times
17 Records of maintenance activities must be kept and made available upon request to
authorized personnel of DEMLR The records will indicate the date, activity, name of person
performing the work and what actions were taken
18 The facilities shall be constructed, operated and maintained in accordance with the provisions
of this permit the approved plans and specifications, and the supporting documents attached
to this permit and on file with the Division
19 Built upon area includes, but is not limited to, structures, asphalt, concrete gravel, brick
stone, slate coquina and parking areas, but does not include raised, open wood decking, or
the water surface of swimming pools

III GENERAL CONDITIONS
1 This permit is not transferable to any person or entity except after notice to and approval by
the Director The permittee shall submit a completed and signed Permit Transfer Application
accompanied by the required fee and supporting documentation as listed on the form, to the
Division at least 60 days prior to any one or more of the following events
a Any ownership change including (Red text is for subdivisions only )
i The assignment of declarant rights to another individual or entity
u The sale or conveyance of the common areas to a Homeowner's or Property
Owners Association subject to the requirements of Session Law 2011-256
ni The sale or conveyance of the project area in whole or in part, except in the
case of an individual lot sale that is made subject to the recorded deed
restrictions and protective covenants
iv Dissolution of the partnership corporate or LLC entity subject to NCGS 55-14-
05 or NCGS 57D-6-07,
b Bankruptcy,
c Foreclosure subject to the requirements of Session Law 2013-121
2 The permittee is responsible for compliance with all of the terms and conditions of this permit
until such time as the Director approves the transfer request
3 Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the DEMLR, in accordance with North Carolina General
Statute 143-215 6A to 143-215 6C
4 The issuance of this permit does not preclude the Permittee from complying with any and all
statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local state and federal) which have jurisdiction
5 In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be
required by this Division, such as the construction of additional or replacement stormwater
management systems
6 The permit may be modified revoked and reissued or terminated for cause The filing of a
request for a permit modification, revocation and reissuance or termination does not stay any
permit condition
7 Permittee grants permission to staff of the DEMLR to access the property for the purposes of
inspecting the stormwater facilities during normal business hours
8 The permittee shall notify the Division of any name ownership or mailing address changes
within 30 days
9 A copy of the approved plans and specifications shall be maintained on file by the Permittee
for a minimum of ten years from the date of the completion of construction
10 The permittee shall submit a completed Permit Information Update form to the Division at least
30 days prior to making any one or more of the following changes
a A name change of the current permittee,
b A name change of the project,
c A mailing address change of the permittee,
11 The permittee is responsible for compliance with all permit conditions until such time as the
Division approves the transfer request Neither the sale of the project in whole or in part, nor
the conveyance of common area to a third party constitutes an approved transfer of the
stormwater permit

12 The permit issued shall continue in force and effect until the permittee files a request with the
Division for a permit modification transfer renewal, or rescission however these actions do
not stay any permit conditions
Permit modified and reissued this the 151 day of April 2019
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
7-S Daniel Smith, Interim Director
Division of Energy Mineral and Land Resources
By Authority of the Environmental Management Commission
Permit Number SW8 051045

Attachment A Certification Form for Ponds 2 & 3
The Reserve at Palmetto Creek Page 1 of 2
Stormwater Permit No SW8 051045
Brunswick County
Designer's Certification
I, as a duly registered in the State of
North Carolina having been authorized to observe (periodically/weekly/full time) the construction of
the protect
(Protect)
for (Protect Owner) hereby state that, to the best of my
abilities, due care and diligence was used in the observation of the protect construction such that the
construction was observed to be built within substantial compliance and intent of the approved plans
and specifications
The checklist of items on page 2 of this form are a part of this Certification
Noted deviations from approved plans and specifications
SEAL
Signature
Registration Number
Date

Certification Requirements
Page 2 of 2
1 The drainage area to the system contains approximately the permitted acreage
2 The drainage area to the system contains no more than the permitted amount of built -
upon area
3 All the built -upon area associated with the protect is graded such that the runoff drains
to the system
4 All roof drains are located such that the runoff is directed into the system
5 The outlet/bypass structure elevations are per the approved plan
6 The outlet structure is located per the approved plans
7 Trash rack is provided on the outlet/bypass structure
8 All slopes are grassed with permanent vegetation
9 Vegetated slopes are no steeper than 3 1
10 The inlets are located per the approved plans and do not cause short-circuiting of the
system
11 The permitted amounts of surface area and/or volume have been provided
12 Required drawdown devices are correctly sized per the approved plans
13 All required design depths are provided
14 All required parts of the system are provided such as a vegetated shelf, a forebay, and
the vegetated filter
15 The required dimensions of the system are provided, per the approved plan
cc NCDEQ-DEMLR Regional Office
Brunswick County Engineering

Attachment 13 CGrtific ition Forms for Pond 1
I he following blank Dcstgncr Cerhficatton forms are included and spcwlic for this project
• As -Built Permittee Certification
• As -Built Designers Certification General MDC
• As -Built Designers Certification for Wet Detention Pond Project
A sepal ate certification is requiredfor each SCM I hose blank certification forms maybe copied and
used as needed, for each SCM and/or as a pat nal certification to adds ess a section or phase of the
project

State Stormwater \lanagcmcnt Systuns
Pcrmii \o SW8 051045
AS-13111 1 PI Rill) f I LF CLR I [FICA I ION —POND 1
I hcrcby state that I am the current permutce for the project named above and I certify by my
signature below, that the project meets the below listed final Submittal Requirements found in
\CAC 0211 1042(4) and the terms conditions and provisions listed in thepermn documents
plans and specifications on file with or provided to the Division
❑ Check here if this is a partial certification Secuon/phasc/SCM
4?
❑_Chc`cc here ifthis is part of a Fast I rack As -built Package Submittal
Printed
County of
Signature
a \otary Public in the State of
do hcrcby certifv that
personally appeared before me this day of
20
and acknowledge the due execution of this as built certification (SEAL)
Witness my hand and official seal
My commission expires
Permrttee s Certification NCAC 1042(4)
CoProvidedmpleted/
I N/A
A DEED RESTRICTIONS / BUA RECORDS
1 The deed restrictions and protective covenants have been recorded
Y or NK
and contain the necessary language to ensure that the project is
maintained consistent with the stormwater regulations and with the
permit conditions
2 A copy of the recorded deed restrictions and protective covenants
Y or N
has been provided to the Division
3 Records which track the BUA on each lot are being kept (See Note
Y or N
1
B MAINTENANCE ACCESS
1 The SCMs are accessible for inspection maintenance and repair
Y or N
2 The access is a minimum of 10 feet wide
Y or N
3 The access extends to the nearest public right-of-way
Y or
C EASEMENTS
1 The SCMs and the components of the runoff collection / conveyance
Y or N
system are located in recorded drainage easements
2 A copy of the recorded plat(s) is provided
Y or IN
D SINGLE FAMILY RESIDENTIAL LOTS - Plats for residential lots that
Y or N
have an SCM include the following
1 The specific location of the SCM on the lot
Y or N
2 A typical detail for the SCM
Y or N
3 A note that the SCM is required to meet stormwater regulations and
that the lot owner is subject to enforcement action as set forth in
Y or N
NCGS 143 Article 21 if the SCM is removed, relocated or altered
without prior approval
E OPERATION AND MAINTENANCE AGREEMENT
Y or N
1 The O&M Agreement is referenced on the final recorded plat
Y or N
Page 12 of 18

State Stormwater Management Systems
Perm n\o SW8051045
2 The O&M Agreement is recorded with the Register of Deeds and
appears to the chain of title
I Y or \T
F OPERATION AND MAINTENANCE PLAN — maintenance records are
being kept to a known set location for each SCM and are available for
Y or N
review
G DESIGNER'S CERTIFICATION FORM — has been provided to the
Y or N
Division
\otel Acceptable records include ARC approvals, as built surveys, and county tax records
Provide an explanetton for every rcqutrcmcnt that was not mct and for every "'QA' below
Attach additional sheets as needed
Page 13 of 18

State Stormwater %lanagemcnt Systems
Permit No S\W051045
AS -BOIL I DESIGNE►2'S CER 1 I6ICA FJON GENERAL NIDC - POND 1
I hereby state that I am a licensed professional and I certify by my signature and seal below, that
I have observed the construction of the project named above to the best of my abilities with all
duc cart and dingcncc and that the project meets the below listed General MDC found in NCAC
021I 1050 in accordance with the permit documents plans and specifications on file with or
provided to the Division, except as noted on the ` AS-i3UIL I' drawings such that the intent of
the stonnwater rules and statutes has been preserved
❑ Chcck here if this is a partial certification Section/phase/SCM
f�
�Z Fcc-. E�rc iiT tfiiT is a part of a fast- I rack As -Built Package Submittal pper 1044(3)
Chcck here if the designer did not observe the construction but is certifving the project
Check here if pictures of the SCM are provided
Printed
Name
NC Registration
Number Date
SEAL
Signature
Consultant s Mailing Address
City/State/LIP
Phone Number
Consultant s Email address
0 Circle N if the as -built value differs from the Plan IfN is circled, provide an explanation on
Page 2
OO N/L = not evaluated (provide explanation on page 2) 3-N/A = not applicable to this SC v1 or
project
Consultant's Certification NCAC 1003((3) & General MDC
Oz N/
OO As -built
(IN/A
1050
E
A TREATMENT REQUIREMENTS
1 The SCM achieves runoff treatment
Y or N
2 The SCM achieves runoff volume match
Y or N
3 Runoff from offsite areas and/or existing BUA is
Y or N
bypassed
I
4 Runoff from offsite areas and/or existing BUA is directed
Y or Nt
into the permitted SCM and is accounted for at the full
build -out potential
5 The project controls runoff through an offsite permitted
Y or N
SCM that meets the requirements of the MDC
6 The net area of new BUA increase for an existing project
Y or N
has been accounted for at the appropriate design storm
level
7 The SCM(s) meets all the specific minimum design
I y or N
criteria
B VEGETATED SETBACKS / BUA
1 The width of the vegetated setback has been measured
Y or N
from the normal pool of impounded waters, the MHW
line of tidal waters, or the top of bank of each side of
rivers or streams
Page 14 of 18

State Stormwatci Management Systems
PermitNo S` 8 051045
2 The vegetated setback is maintained in grass or other
Y or \'
vegetation
meets the of NCGS 143-214 7 I
y or N
2hat
)(2s located the setback
4 BUA that does not meet the requirements of NCGS 143-
Y or \
214 7 (b2)(2) is located within the setback and is limited
to
a Publicly funded linear projects (road, greenway
sidewalk)
b Water -dependent structures
c Minimal footprint uses (utility poles signs, security
fighting and appurtenances
5 Stormwater that is not treated in an SCM is released at
Y or N
the edge of the setback and allowed to flow through the
setback as dispersed flow
tOAs-built
G /
ON/A.
C STORMWATER OUTLETS — the outlet handles the peak
y N
flow from the 10 year storm with no downslo a erosion
or
D VARIATIONS
1 A variation (alternative) from the stormwater rule
Y
provisions has been implemented
or
2 The variation provides equal or better stormwater control
y
and equal or better protection of surface waters
or
E COMPLIANCE WITH OTHER REGULATORY PROGRAMS
y N
has been met
or
F SIZING -the volume of the SCM takes the runoff from all
surfaces into account and is sufficient to handle the required
Y or N
storm depth
--
G CONTAMINATED SOILS — infiltrating SCM's are not
Y or N
located in or on areas with contaminated soils
H SIDE SLOPES
1 Vegetated side slopes are no steeper than 3H 1 V
Y or N
2 Side slopes include retaining walls gabion walls or
y or N
other surfaces that are steeper than 3H 1 V
3 Vegetated side slopes are steeper than 3H 1 V (provide
Y or \
supporting documents for soils and vegetation)
I EROSION PROTECTION
1 The inlets do not cause erosion in the SCM
Y or N
2 The outlet does not cause erosion downslope of the
y or N
discharge point during the peak flow from the 10 year
storm
J EXCESS FLOWS — An overflow / bypass has been
y N
provided
or
K DEWATERING —A method to drawdown standing water has
Y or N
been provided to facilitate maintenance and inspection
L CLEANOUT AFTER CONSTRUCTION — the SCM has been
Y or N
cleaned out and converted to its approved design state
M MAINTENANCE ACCESS
1 The SCM is accessible for maintenance and repair
Y or IN
2 The access does not include lateral or incline slopes
y or N
>3 1
N DESIGNER QUALIFICATIONS (FAST -TRACK PERMIT) —
The designer is licensed under Chapters 89A 89C, 89E, or
Y or N
89F of the General Statutes
Provide an explanation for every A4DC that was not met and for every item marked 'N/A or
"\/E" below Attach additions( pages as needed
Page 15 of 18

Statc Stormwater Management Systems
PermitAo SW8051045
AS-13UIL 1 DTSIGN I R'S Cl R 1 [FICA I iON I,OR WE 1 DT, 11 \ I [ON POND PRO ICC 1
Pond 1
I hereby state that I am a licensed professional and I certify by my signature and seal below that
I have observed tht, construction of the project named above to the best of my abilmcs with all
duc care and diligence and that the project meets all of the MDC found in N'CAC 02I 11053 in
accordance with the permit documents plans and specifications on file with or provided to the
Division except as noted on the ` AS -BULL P drawings, such that the mtcnt of the stormwater
rules and the general statutes has been preserved
❑ Chcck hcrc if this is a partial ccrtiftcation Section/phasc/SCM
�v
TER —here iTtfiis is part of a fast -track As -Built Package Submittal per 1044(3)
Chcck here if thc, Dcsigncr did not observe the construction but is certifying the project
Chcck here if pictures of the SC%M are provided
Printed Name
NC Registration
SEAL
Signature
Consultant's Mailing Address
City/State/ZIP
Phone \umber
Consultant's Email address
O Circle N if the as -built value differs from the Pla permit IfN is mrcicd provide an
explanation on page 2
ONX, = not evaluated (provide explanation on page 2) ON/A = not applicable to this project or
SCM
I his Certification must be completed in conjunction with the Gencral MDC certification under
NCAC 02H 1050
Consultant's Certification (MDC 1053)
iOAs-built
ON/E
ON/A
A Forebay / Depths / Fountain
1 The available Sediment storage is consistent with the
y ,
approved plan and is a minimum of 6 in
or i
2 Water flow over the forebay berm into the main pond
y NI
1
occurs at a non -erosive velocity
or
3 The provided Forebay Volume is 15%-20% of the main
y N
pool volume
or
4 The Forebay entrance elevation is deeper than the exit
Y
'Nelevation
into the and
or
5 The Average Design Depth of the main pond below the
permanent pool elevation is consistent with the permitted
Y or
value?
6 Fountain documentation is provided
Y or IN
B Side slopes / Banks / Vegetated Shelf
awidth of the Vegetated Shelf is consistent with the
y N
approved plans and is a minimum of 6 feet
or
2 The slope of the Vegetated Shelf is consistent with the
y
N,a
roved plans and is no steeper than 6 1
or
C As -built Main Pool / Areas / Volumes I Elevations
1 The permanent pool surface area provided is consistent
y NI
thepermitted value
or
Page 16 of 18

State Stormwater Dianagcment Systems
I'crinit\o SW8051045
2
The Temporary Pool Volume provided is consistent with
the permitted value
t r
3
The permanent pool elevation is consistent with the
I Y
N
permitted value
or
4
The temporary pool elevation is consistent with the
}
permitted value
or
OAs-built
ON/E
ON/A
D Inlets / Outlet / Drawdown
1
The design volume draws down in 2-5 days
Y
or
N
2
The size of the Orifice is consistent with the permitted
Y
N
I�
value
or
3
A trash rack is provided on the outlet structure
Y
or
IN
4
Hydrologic impacts to the receiving channel are minimized
Y
N
from the 1 T 24 hr storm discharge?
or
5
The inlets and the outlet location are situated per the
Y
\
approved plan and avoid short-circuiting
or
E Vegetation
1
The vegetated shelf has been planted with a minimum of 3
I Y
N
diverse species
or
2
The vegetated shelf plant density is consistent with the
approved plans and is no less than 50 plants per 200 sf or
Y
or
N
no less than 24 inches on center
Provide an explanation for every MDC that was not met and for every item marked N/A or
N/E below Attach additional pages as ncedcd
Page 17 of 18

State Stormwatcr Vlanagcnunt Systuns
Permit \o S\i8 051045
Utachment C imncntous Allocitton Summan
Pond 1
Pond 2
Pond 3
Permit
4/21/06 &
10/15/18
4/1/2019
Permit
4/21/06 &
10/13/18
4/1/2019
Permit
4/21/06,
10/15/18,
& 4/1/19
Impervious
194,129
237,076
320,310)
320,310
181,312
Onsite Buildings
109,988
181,173
211,100
224,320
140,000
Onsite Streets/Parking
72,794
47,247
97,756
75,721
37,282
Onsite Sidewalks
0
8,656
0
19,243
4,030
Other Onsite
11,347
0
11,454
0
0
Future
0
0
0
1,026
0
Offsite
0
0
0
0
0
Page 18 of 18

DEMLR USE ONLY
D to coved
Fee Paid
Permit Number,
bI
*- (601 506
1 sta 05 ID
Applicable Poled ❑ Coastal SW -1995 ❑ Coastal SW -
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters
❑ Other WQ M mt Plan
2008 ❑ Ph II - Post Construction
❑ Universal Stormwater Management Plan
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
Tlns form may be photocopied for use as art original
[ GENERAL INFORMATION
1 Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc )
The Reserve at Palmetto Creek
2 Location of Project (street address)
1108 Palmetto Creek Way SE
City Bolivia County Brunswick Zip 28422
3 Directions to project (from nearest major intersection)
From the intersection of US 17 and NC 211, travel approximately 3 75 miles southeast on NC 211
4 Lahtude 33° 59' 38" N Longitude 78' 13' 02' W of the main entrance to the project
II PERMIT INFORMATION
1 a Specify whether project is (check one) ❑New ®Modification ❑ Renewal w/ Modificationt
tReneurals unth modifications also requires SWU-102 - Reneioal Application Form
b If this application is being submitted as the result of a modification to an existing permit, list the existing
permit numberSW8 051045 , its issue date (if known)04/21/06 and the status of
construction ❑Not Started ®Partially Completed* ❑ Completed* *provide a desigmcr's ccrtificahon
2 Specify the type of project (check one)
❑Low Density ®High Density ❑Drams to an Offsite Stormwater System []Other
3 If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application, list the stormwater project number,
if assigned, and the pievious name of the project, if different than currently
proposed,
4 a Additional Project Requirements (check applicable blanks, information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748)
❑LAMA Major ®Sedimentation/Erosion Control ac of Disturbed Area
❑NPDES Industrial Stormwater ❑404/401 Permit Proposed Impacts
b If any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit
5 Is the project located within 5 miles of a public airport? ®No ❑Yes s - k--
If yes, sec S L 2012-200, Part VI http //portal ncdenr cn g/web/h/tules and -regulations OCT 16 2 (116 1
Form SWU-101 Version Oct 31, 2013 Page I of

III CONTACT INFORMATION
1 a Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc who owns the project)
Applicant/ Organization
Signing Official & Title L
b Contact information for person listed in item la above
Street Address 8620 River Road
City Wilmington State NC Zip 28412
Mailing Address (if applicablc)
City
Phone (910 ) 520-6011
Email buyhorizonhomes@gmall corn
State
Fax
Zip
Please check the appropriate box The applicant listed above is
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below )
2 a Print Property Owner's name and title below, if you are the lessee, purchaser or developer (This is the
person who owns the property that the project is located on)
Property Owner/Organization
Signing Official & Title
b Contact information for person listed in item 2a above
Street Address
City
Mailing Address (if applicable)
State
Zip
City State Zip
Phone j ) Fax j )
Email
3 a (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project
Other Contact Person/Organization
Signing Official & Title
b Contact information for person listed in item 3a above
Mailing Address
City State
Phone ( ) Fax
Email
4 Local jurisdiction for budding permits
Point of Contact
Phone #
Form SWU-101 Version Oct 31, 2013 Page 2 of 6
Zip
EC VE
OCT 16 ?^111
e}
6Y

IV PROJECT INFORMATION
1 In the space provided below, bnefly summarize how the stormwater runoff will be treated
Three wet detention ponds
2 a If claiming vested rights, identify the supporting documents provided and the date they were approved
❑ Approval of a Site Specific Development Plan or PUD Approval Date
❑ Valid Building Permit Issued Date
❑ Other Date
b If claiming vested rights, identify the regulahon(s) the project has been designed in accordance with
❑ Coastal SW -1995 ❑ Ph II - Post Construction
3 Stormwater runoff from this project drams to the Lumber River basin
4 Total Property Area 42 41 acres
5 Total Coastal Wetlands Area 0 acres
6 Total Surface Water Area 0 acres
7 Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area' 42 41 acres
Total project area shall be calculated to exclude the following the nornial pool of unppounded structures, the area
between the banks of streanis and rivers, the area below the Nornial High Water (NM lute or Mean High Water
(MHW) line, and coastal wetlands landward front the NHW (or MHI9 line The resultant project area is used to
calculate overall percent built upon area (BUA) Non -coastal wetlands landward of the NHW (or MHW) line nmy
be included in the total project area
8 Project percent of impervious area (Total Impervious Area / Total Project Area) X 100 = 40 0 %
9 How many drainage areas does the project have?3 (For high densihj, count 1 for each proposed engineered
stonmwater BMP For low density and other projects, use 1 for the whole properhj area)
10 Complete the following information for each drainage area identified in Project Information item 9 If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below
Basin Information
Drama e Area 1
Drama e Area 2
—Draina—
ge Area 3
Drainage Area
Receiving Stream Name
Scotts Branch
Scotts Branch
Scotts Branch
_
Stream Class *
C,Sw
C,Sw
C,Sw
Stream Index Number *
15-25-1-10
15-25-1-10
15-25-1-10
Total Drainage Area (so
371,715
689,745
460,070
On -site Drainage Area (so
371,715
689,745
460,070
Off -site Drainage Area (so
0
0
0
Proposed Impervious Area** (so
1 237,076
320,310
181,312
% Impervious Area** total
638
464
394
Impervious- Surface Area
Drainage Area 1
Drainage Area 2
Drainage Area 3
Drainage Area
On -site Buildings/Lots (so
181,173
224,320
140,000
_
On -site Streets (so
47,247
75,721
37,282
On -site Parking (so
-
-
-
On -site Sidewalks (so
8,656
19,243
4,030
Other on -site (so
-
-
-
Future (so
1,026
Off -site (so
-
Existing BUA*** (so
1
-
Total (so
237,076
320,310
o rcuat cuss unu inaex wiuniber can be determnied at httpllpoi tal ncdenr org(u�'f s csu clnssificahoit
" Impervious area is defined as the built upon area including' gLQ"but not hunted to, buddin .ram t���
r re s,
sidewalks gravel areas etc
"* Report only that aniount of existing BUA that will renunni after dcvelopincnt Do ioogreport any existing B f A that
is to be removed and which will be replaced by new BUA BY
Form SWU-101 Version Oct 31, 2013 Page 3 of 6

IV PROJECT INFORMATION
1 In the space provided below, bnefly summarize how the stormwater runoff will be treated
Three wet detention ponds
2 a If claiming vested rights, identify the supporting documents provided and the date they were approved
❑ Approval of a Site Specific Development Plan or PUD Approval Date
❑ Valid Building Permit Issued Date
❑ Other Date
b If claiming vested rights, identify the regulation(s) the project has been designed in accordance with
❑ Coastal SW -1995 ❑ Ph II - Post Construction
3 Stormwater runoff from this project drams to the Lumber River basin
4 Total Property Area 42 41 acres
5 Total Coastal Wetlands Area
6 Total Surface Water Area 0
7 Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total
Area' 4241 acres
Total project area shall be calculated to exclude the followtn the norinal pool of nunpounded structures the area
between the banks of streanis and rivers, the area below the Norinal High Water (NM lure or Mean igh Water
(MHW) line, and coastal wetlands landward front the NHW (or MHW) It The resultant project ea is used to
calculate overall percent built upon area (BUA) Non -coastal wetlands landward of the NHW (or HW) line only
be included in the total project area
8 Project percent of impervious area (Total Impervious Area / Total Project Area) X 100 396 %
9 How many drainage areas does the project have?3 (For high densitili, count 1 for each pr posed engintercd
stormwater BMP For low densihj and other pro]ects, use 1 for the whole property area)
10 Complete the following information for each drainage area identified in Project formation item 9 If there
are more than four drainage areas in the project, attach an addihoi sheet wi the information for each area
provided in the same format as below
Basin Information
Drainage Area 1
Drainage Area 2
rama e Area 3
Drainage Area
Receiving Stream Name
Scotts Branch
Scotts Branch
Scotts Branch
_
Stream Class *
C,Sw
C,Sw
C Sw
Stream Index Number *
]5-25-1-10
15-25-1-
15-25-1-10
Total Drainage Area (so
371,715
689,7 5
460,070
On -site Drainage Area (so
371,715
68 ,745
460,070
Off -site Drainage Area (so
0
0
0
Proposed Impervious Area** s
230,140
Z320,310
181,312
% Impervious Area** total
619
46 4
394
Impervious— Surface Area
Drama e Area
Drama e Area 2
Drama e Area 3
Drama e Area
On -site Buildings/Lots (so
174,237
219,560
140,000
_
On -site Streets (so
47,247
75,721
37,282
On -site Parking (so
-
-
-
On -site Sidewalks (so
656
19,243
4,030
Other on -site (sf)
7 -
_
_
Future(so
-
5,786
Off -site (so
-
-
Total (sf)
330,140
1 320,310
181,312
Srreann uass and index Number can be determined at httP((poi tal ncdunr ors web rn s csi classt ucahons
Innpervious area is defined as the built upon area including, but not hunted to, buildings, roadrypev!ti
gyi 1E^
sidewalks gravel areas, etc
Report only that anwunt of existing BUA that will remain after developincut Do not report at�g Bu� � � 4at
is to be removed and which will be replaced by new BUA
a
Form SWU-101 Version Oct 31, 2013 Page 3 of 6

11 How was the off -site impervious area listed above determined? Provide documentation NPr
Protects in Union County Contact DEMLR Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent stormwater requirements as per 15A NCAC 02B 0600
V SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project The latest versions of the forms can be downloaded
from http //portal ncdenr ore/web/wo/ws/su/bmp-manual
VI SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR) A complete package includes all of the items listed below A detailed application
instruction sheet and BMP checklists are available from
http//poitaiiicdenrorg/web/wq/WS/SLI/statesw/foinis does The complete application package should be
submitted to the appropriate DEMLR Office (The appropriate office may be found by locating project on the
interactive online map at http //portal ncdenr org/web/wq/ws/su/maps )
Please indicate that the following required information have been provided by initialing in the space provided
for each item All original documents MUST be signed and initialed in blue ink Download the latest versions
for each submitted application package from http //portal ncdenr org/web/wn/ws/su/statesw/forms does
i als
1 Original and one copy of the Stormwater Management Permit Application Form
2 Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form (if required as per Part VII below)
3 Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M ea:—
agreement(s) for each BMP
4 Permit application processing fee of $505 payable to NCDENR (For an Express review, refer to
http //www envhelp org/pages/onestopexpress html for information on the Express program
and the associated fees Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting )
5 A detailed narrative (one to two pages) describing the stormwater treatment/managementfor
the project This is required in addition to the brief summary provided in the Project
Information, item 1
6 A USGS map identifying the site location If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2
mile the map
7 Sealedd,, signed
and dated calculations (one copy)
8 Two sets of plans folded to 8 5" x 14' (sealed, signed, & dated), mclud
a Development/ Project name FIVE
b Engineer and firm t
c Location map with named streets and NCSR numbers QCT� b 9^
d Legend
e North arrow l
f Scale BY
g Revision number and dates
It Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters and any coastal wetlands landward of the MHW or NHW lines
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters
i Dimensioned property/project boundary with bearings & distances
j Site Layout with all BUA identified and dimensioned
k Existing contours, proposed contours, spot elevations, finished floor elevations
1 Details of roads, drainage features, collection systems, and stormwater control measures
in Wetlands delineated, or a note on the plans that none exist (Must be delineated by a
qualified person Provide documentation of qualifications and identify the person who
made the determination on the plans
n Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
o Drainage areas delineated (included in the main set of plans, not as a separate document)
Form SWU-101 Version Oct 31, 2013 Page 4 of 6

p Vegetated buffers (where required)
9 Copy of any applicable soils report with the associated SHWT elevations (Please identify Nla
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs Include an 8 5 xll" copy of the NRCS County Soils map with the
project area clearly delineated For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate
(Infiltration Devices submitted to WiRO Schedule a site visit for DEMLR to verify the SHWT prior
to submittal, [phone] )
10 A copy of the most current property deed Deed book 3731 Page No 372 194
11 For corporations and limited liability corporations (LLC) Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 2H 1003(e)
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned
http //www secretary state nc us/Corporations/CSearch aspxx
VII DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided
as an attachment to the completed and notarized deed restriction form The appropriate deed restrictions and
protective covenants forms can be downloaded from hap //portal ncdenr org/web/Ir/state-stormwater-
forms does Download the latest versions for each submittal
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot
VIII CONSULTANT INFORMATION AND AUTHORIZATION
Applicant Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information)
Consulting Engineer Phillip G Tripp, P E
Consulting Firm Tripp Engineering
Mailing Address 419 Chestnut Street
City Wilmington State NC Zip 28401
Phone (910 ) 763-5100
Email office@trippen mg eering com
Fax (910 ) 763-5631
IX PROPERTY OWNER AUTHORIZATION (if Contact Information, itcin 2 has been filled ont, complete this
section)
I, (print or hype name of person listed in Contact Information, item 2a) certify that I
own the property identified in this permit application, and thus give permission to (petit or type name of person
listed in Contact Information, item la) with (print or hype name of organization listed in
Contact Inforination, item la) to develop the project as currently proposed A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system ®EC EIV Eh
OCT 16 nl 3
1
BY
Form SWU-101 Version Oct 31, 2013 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back
to me, the property owner As the property owner, it is my responsibility to notify DEMLR immediately and
submit a completed Name/Ownership Change Form within 30 days, otherwise I will be operating a stormwater
treatment facility without a valid permit I understand that the operation of a stormwater treatment facility
without a valid permit is a violation of NC General Statue 143-2151 and may result in appropriate enforcement
action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215 6
Signature
a Notary Public for the State of
do hereby certify that
before me this _ day of
Date
County of
personally appeared
, and acknowledge the due execution of the application for
a stormwater permit Witness my hand and official seal,
SEAL
My commission
X APPLICANT'S CERTIFICATION
I, (print or hjpe nanie of person listed in Contact Infonnahon, itun la) lack I Carlisle
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covens is will be record d t t the proposed project complies with the requirements of the
applicable storm wate r es a 15 C H 1000 and any other applicable state stormwater requirements
Signature Date I-A0 /
I, a Notary Public for the State of , 4 County of
do hereby certify that /1; S personally appeared
before me this _ ay of ,±seal,/
nd a wled the d xe�n oft phc oa for
a stormwater permit Witness my hand and officLy �'t�(n
►EMELLE E cry E
NOTAW KUX
WLNTY, NC
SEAL
My commission expires Z�) -y- ` 0 �5_ zoZ(
ECIE I W
OCT 16 2^' } '
BY �—
Form S WU-101 Version Oct 31, 2013 Page 6 of 6

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone [phone] • FAX [phone]
March 28, 2019
NCDEQ
Division of Energy, Mineral and Land Resources
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn Ms Kelly Johnson
Re The Reserve at Palmetto Creek
Permit No SW8 051045
TE 16029
Dear Kelly
MAR 2 9 a0li9 1
In response to your comments dated February 28, 2019, we offer the following
1 As we discussed via March 1511 phone conversation, we are proposing a 6' wide
shelf on the existing 3 1 side slopes We have added the top and bottom
elevations of the vegetated shelf to the detail sheet
2 Property ]me metes and bounds have been added to the plan
Please review for approval and contact us with any questions, comments or if you need
additional information Thank you
PC
Phillip G Tripp, P E
PGT dcb
Enc

ROY COOPER
Governor
MICHAEL S REGAN
Secretary
surc�,,�
• �QWrVNP•
WILLIAM E (TOBY) VINSON JR NORTH CAROLINA
Interim Director Environmental Quality
I'cbruary 28, 2019
Via email only buthorizonhomeaamad eom
KG Plaia, LLC
Arm Mr Jack Carlisle, Manager
8620 River Road
Wilmington, AC 28412
Subject Request for Additional information
Stormwatcr Project -o S'*8'8 051045
I he RCtiLrVL At Palmetto Crctk
Brunswick County
Dear Mr Carlisle
I he Wilmington Regional Office received and accepted a modified StatL Stormwater Management Permit
Application for the subject project on October 16, 2018 A request for additional information was mailed
on December 12, 2018, and a response was received on 1'ebruary 20 2019 A preliminary in-depth
review of that information has determined that the application is not complete and that additional
information is needed I o continue the revicw, please provide the following additional information
Clarification It appears that only Pond 1 s design is changing to accommodate the increase in
impervious area Pond 2 has impervious that is being reallocated and there are no changes to
Pond 3 I'or Pond 1, the calculations show that the bottom of the vegetated shelf is at 36 Omsl,
the PP is at 37 Omsl and the top of the vegetated shelf is at 38 Omsl I he elevations of the
vegetated shelf are not shown on the plans, but the 1 Oft shelf is shown to have a 3 1 slope (which
appears to be a typo) it appears that the 1 Oft shelf is intended have a bottom elevation of 36 5msl
and a top elevation of 37 5msh Please verify that this is correct and make any necessary
corrections to the plans calculations, and supplement (If the supplement is revised, please send
the revised copy both in hard copy and email I have not run the calculations 1 will do so upon
re -submittal)
Project Area [15A NCAC 02H 1042(2)(g)(n)]
a 12/12/18 Letter Please provide dimensioned project or project phase boundary with
bearings and distances
b 2/20/19 Letter We can provide a copy of the final plats recorded by the surveyor We
respectfully request waiving a metes and bounds plat of the drainage areas
c 2/28/19 Unfortunately i cannot waive the requirement to have the bearing and distance
Imes for the project area It is a requirement in the regulations which read, `rhe
applicant shall submit a nonrefundable permit application fee in accordance with G S
143-215 31) and two signed hard copies and one electronic copy of each of the following
signed, scaled, and dated plans of the entire site that are a minimum of 22 inches by 34
inches in sve and are at a legible scale All plan packages shall include dimensioned
project or project phase boundary with bearings and distances (Note that the metes and
bounds are not needed for the drainage areas)
Pleasc remember to confirm that any revised information is presented consistently throughout the
application documents including calculations, supplements, narrative, and plans Please also remember to
provide two hard copies of any updated documents per 15A \CAC 0211 1042(2)
D_E QJ� North Carolina Department of Environmental Quality I Division of Ener% Mineral and Land Resources
\ Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington North Carolina 28405
1rHwx y
91079b 7215

State Stormwater Permit No SWS 051045
Page 2 of f
I he requcstcd information should be received in this Officc prior to March 15, 2019 or the application
vv ill be returned as incomplete If the project is returned and you wish to re -submit later you will need to
resubmit all required ituns at that time including the application fee
If additional time is needed to submit the requested information please e-mail, mail or fax your extension
request, prior to the original due date to the Division using the contact information avadablc in this Icttcr
I he extension request must include a Justification and a date of when the requcstcd information will be
submiacd to the Division Plcase remember that extension requests delay the issuance of the final
permit I he Division is allowed 90 days from the receipt of a complete application to issue the permit
I he construction of any impervious surfaces other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of -',,CGS 143-215 1 and is subject to enforcement
action pursuant to ACGS 143-215 6A
Plcase reference the State assigned application number on all correspondence Ifyou have any questions
concerning this matter please feel free to call me at [phone] or email me at
kclly pjohnson@ncdenr gov
Sincerely
z4 fa&tdog
Kelly Johnson
Environmental Engineer
GDS/kpj \\\Stormwater\Permits & Projects\2005\051045 I ID\2018 12 addinfo 051045
cc Phil I ripp via email only, office@trippengmccnng cont
Wilmington Regional Office Stormwater Fill,

Johnson, Kelly
From Johnson Kelly
Sent Thursday, February 28 2019 1049 AM
To office@tnppengineenng com buyhonzonhomes@gmail com
Subject RE SW8 051045, The Reserve at Palmetto Creek
Attachments 2019 02 addinfo 051045 docx
Please see the attached Request for Additional Information
Thanks,
Kelly
From Johnson, Kelly____ _---� ___---- --- -� � - -
Sent Wednesday, December 12, 2018 11 20 AM
To 'office@tnppengineering com' <office@trippengineering com>, 'buyhonzonhomes@gmail com'
<buyhorzonhomes@gmail com>
Subject SW8 051045, The Reserve at Palmetto Creek
Please see the attached Request for Additional Information
Thanks,
Kelly
f"tUwDkV1,sm'
Kelly Johnson
Environmental Engineer
NC Division of Energy, Mineral and Land Resources
Stormwater Permitting
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Phone [phone]
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

Aoo
TRIPP ENGINEERING, P.C. i
419 Chestnut Street
Wilmington, North Carolina 28401
Phone [phone] • FAX [phone]
February 20, 2019
NCDEQ
Division of Energy, Mineral and Land Resources
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn Ms Kelly Johnson
Re The Reserve at Palmetto Creek
Permit No SW8 051045
TE 16029
Dear Kelly
FEB 10 2019
Mlt ----
In response to your comments dated December 12, 2018, we offer the following
1 General Which rule(s) are each pond designed under? I believe you had told me that the pond(s)
had to be redesigned because they were constructed with incorrect elevations (I am not sure if
<sOqS that was all three ponds, or just one or two of theme) The impervious area for Pond 1 increased by 36,011 sf, which could trigger it into a major modification to be designed under the 2017 rules
31� A if the pond had to be redesigned to accommodate that new volume The impervious to Ponds 2
and 3 did not increase All three drainage areas remained the same All three ponds have been
Q� designed for 1 5" as opposed to taking the previously -permitted impervious at 1 0", and so it
appears that you are designing for the 2017 rules? However, the average depth equations and the
forebay percentages appear to match the 2008 rule (18-22% of the whole pond) rather than the
2017 rule (15-20% of the main pond) Please advise [I have not yet compared the elevations in
the calculations against the elevations in the plans I have also not yet reviewed the design for the
2017 rules ( 1050/General MDCs for all SCMs, or 1053/Wet Pond SCMs), or the 2008 Rule
design standards 1 will do so upon resubmittal ]
u Ponds were redesigned under the 2017 rules
2 Project Area [15A NCAC 02H 1042(2)(g)(n)] Please provide dimensioned project or project
phase boundary with bearings and distances
e We can provide a copy of the final plats recorded by the surbeyor We respectfully request
waiving creating a metes and bounds plat of the drainage areas
ye Contours [15A NCAC 02H 1042(2)(g)(iv)] Please provide proposed contours and drainage
k patterns Some spot elevations are provided, but the direction of the drainage is not clear for all
v'Oy(acp� S areas of the project Please provide contours in support of the drainage area plan
L �,tP 0 Drainage direction has been clarified with flow arrows

Typical Townhouse Footprint [15A NCAC 02H 1042(2)(g)(v)] Please show the site layout for
all existing and proposed built -upon areas Please provide atypical townhouse footprint with
dimensions on this sheet or a detail sheet, and also clarify which direction the downspouts will
dram
G Typical townhouse footprint is provided Note has been added "Downspouts dram towards
front of the lot"
O&M Agreements [ 15A NCAC 02H 1042(2)0)] Please provide a signed and notarized
operation and maintenance agreement that meets the requirements of 1050(11) and (12)
• Signed O&M Agreement was provided with permit transfer A copy is enclosed
6 Deed Restrictions [I 5A NCAC 02H 1003(7) and 1042(2)(k)] Deed restrictions have been
submitted showing that both the single family homes and the townhomes will have a maximum
impervious area per lot Will the townhomes have a "yard" sold with them, or will the property
owner only buy the footprint of their unit in the building? If there is no yard, then the townhomes
do not need to be deed restricted (because the owner doesn't own land to build any impervious
on) But, if there is a "yard" please show the lot lines for the townhomes on the plans in order to
specify where the deed restricted impervious is to be located for each townhor W
• Townhomes will not be sold with yards
Vr Collection System [ 15A NCAC 02H 1042(2)(g)(vu)] Please provide the details of the
stormwater collection system, including the inverts of the piped collection system
c Inverts have been labeled
Wetlands Note [15A NCAC 02H 1042(2)(g)(ui)] Please provide the boundaries of all surface
waters, wetlands, regulatory flood zones, protected vegetated setbacks, and protected riparian
buffers, or a note on the plans that none exist
e Note that no wetlands exist on site has been added to the plan
Pond 1 Please ensure that all inlet pipes enter the pond through the forebay
i Maui pool inlet pipe to be plugged
10 Typo Please check the incremental volumes for Pond 3 for elevation 22
v • Revised calculations are enclosed
\.K�Supplement [15A NCAC 02H 1042(2)] Please email the supplement form to the email address
provided below so that it can be preserved electronically per the regulatory requirements
• Supplement will be emailed
Please review for approval and contact us with any questions, comments or if you need
additional information Thank you
PGT dcb
Eric

TE 16029
Stormwater & Erosion Control Narrative
The Reserve at Palmetto Creek
Brunswick County, NC
The Reserve at Palmetto Creek is a residential site consisting of 60 single-family lots and 86
townhome lots in Brunswick County, owned by KG Plaza, LLC The project area is
approximately 42 41 acres No wetlands exist on the site
The Reserve at Palmetto Creek previously proposed 60 single-family lots and 88 townhomes
The project now proposes to construct 60 single-family houses and 86 townhomes for a total of
146 units, asphalt roadway with curbing, concrete sidewalks, three (3) existing wet detention
basins, and utility extensions All outflow from the drainage basins will dram to Scotts Branch,
classification C,Sw, Index No 15-25-1-10, in the Lumber River Basin All built up areas
(BUAs) will be collected and routed to the wet detention pond
The site has three (3) drainage areas Drainage Area 1 is approximately 8 53 acres There are
51 townhome units at 3,552 sf per unit within the drainage area as well as 47,247 sf of streets
and 8,656 sf of concrete sidewalk The total impervious area for DA 1 is 5 44 acres
Drainage Area 2 is approximately 15 83 acres There are 35 townhome units at 3,552 sf per unit
and 25 single family homes at 4,000 sf each within the drainage area as well as 75,721 sf of
streets, 19,243 sf of concrete sidewalk and 1,026 sf for future impervious The total impervious
area for DA 2 is 7 35 acres
Drainage Area 3 is approximately 10 56 acres There are 35 single family homes at 4,000 sf
each within the drainage area as well as 37,282 sf of streets and 4,030 sf of concrete sidewalk
The total impervious area for DA 3 is 4 16 acres
The project will be treated by erosion control measures such as drop inlets with inlet protection,
temporary silt fence, and gravel construction entrance Three (3) wet detention basins provides
sufficient storm water management to meet the State's 1 5" requirement An emergency
spillway has been designed for the 100-year storm assuming the principal spillway is obstructed
or not operating properly
ECEIVE
R FEB 2 0 2019
BY

02/20/19
PGT
Total Drainage Area
s ft acres
371 7' 8 53
The Reserve at Palmetto Creek
Stormwater Pond Calculations
Pond 1
Impervious Area
Land Use
sq It
acres
Proposed Building
„ 181 17:,,.
4 16
Proposed Streets
47 247
1 08
Proposed Sidewalk / Concrete
8 656
020
Future Impervious
; 0
000
000
Total
237 076
544
Time of Concentration
Hydraulic Length (L) = ' 960 ft
change in Height (H) = s 5 ft
Tc = (1_3 /H) 3e5 / 128
11 70 min
Flow for 1 year 24 hour Storm (Qt)
QPRE _ (CPRE) x (It) x (Area)
= 6 23 cfs
QPosT = (CPosT) x (It) x (Area)
29 09 cfs
Detention Pond Design
Does Area Drain to SA Waters? r n 1
% impervious = 0 638
= 63 8%
CPRE= 015
CPOST = (% imp )( 95)+(1 % imp )( 25)
070
11 = 4 87 in/hr
,to 723 in/hr
Flow for 10 year 24 hour Storm (Qto)
QPRE _ (CPRE) x (110) x (Area)
= 9 25 cfs
QPosT = (CPosT) x (Ito) x (Area)
43 19 cfs
State Surface Area Renuired at normal nnnl
Pond side slopes = 3 1
Depth b/w Bot of V S & 400
Bot Pool =
SA/DA = 00468
Chart for 90% TSS Removal for Wet
Detention Pond without Vegetative Filter)
Red SA = SAIDA x Total Drainage Area
17 396 sq ft
Provided SA - 55 307 sq ft
Pond Size
ft )
(so It
c
c
ft
s
c
c
Top of Bank
V140 00; 1j ,y
> ,48 546
90 516
291 529
Top of Bank ^
4000
9 943'
19 539
60 671
Temp Pool
3800 ��r
'41 970'
0
201 013
Temp Pool
' 38 00=
9 596
9 425
41 132
Top of V S
'F38 00.P,1s. .�
41 970 r
44 012
201 013
Perm Pool
3700
�9 253
8 726
31 708
Perm Pool
d+37 00 ,7 ;t`
b 46 054 t*
50 171
157 001
Bot of V S
. 36 001
'8 198-
22 982
22 982
Bot of V S
' 36 00
34 `146 ,
106 830
106 830
'Sed Elev +,
32 00
3 293_
0
0
Sed Elev
_ 32 00
19 269 `
0
0
Sediment Removal
Elevation
= 1 higher
than Bott
of Pon(
SHGWT
433650 w
Bottom SA = 19 269 sq It
Bottom of VS SA= 34 146 sq ft
Permanent Pool SA = 46 054 sq It
Vol = [((PP SA + Bottom VS SA)/2) x (PP el Bottom VS at )] F
+ [((Bottom VS SA + Bottom Pool SA)/2) x (Bottom VS el Bottom Pool el )] I.
146 930 cu It
Fore bay
Provided Normal Forebay Pond Volume
Bottom of Pool SA= 3 293 sq ft
Permanent Pool SA = 9 253 sq ft
Vol = [(P P SA + Bottom SA) / 21 x (P P at Bottom at )
31 365 cu It Depth= 5 00 It
Required Forebay Volume 15% 20% required)
Vol = 20% of Permanent Pool volume of Pond and Forebay
35 659 cu It
Volume required to contain from design storm(ft3)= 28 994
Therefore maximum sta a is between stages and cumulative volumes (main pond plus forebay)
Stage
Cuml
Volume
37 00
0
40 00
163 492
16029
'FIVE
T8 2 0 2019
Total Provided PP Volume
= 178 295 cu It
Using Interpolation to determine stage at volume = 28 994
Maximum Stage (feet) = 3753
Therefore set Temporary Pool Elevation at or higher than Maximum
of Forebay
= 1759
16029 DENR Wet Detention Suppl B Pond 1 Calc 08 01 17 1 of 4
Z•fo' 1q
GREGOR,�%0'
f/11111111�

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
P
Provided Main Pond Storage Volume and 1
Vol = [((PP SA + Top of VS SA)/2) x (Top of VS Elev — PP Elev)]
+ [((Top of VS SA+TP SA)/2) x (TP Elev Top of VS Elev )]
= 44 012 cu ft
Provided Forebay Storage Volume
137 Permanent Pool SA= 9 253 sq ft
38 -1 Temp Pool SA= 9 596 sq ft
Vol = [((PP SA + Temp Pool SA)/2) x (Temp Pool Elev — PP Elev)]
9 425 cu R
Total Provided Storage Volume
Vol = 53 437 cu ft
State Volume Req for Storage of first 1 5 runoff
RV = 05+ 009(% Imp)
= 0 624
V= (Design rainfall)(Rv)(Drainage Area)
1. 28 994 cu ft
Outlet Structure Design
Flow for 2 day drawdown
for Min Volume required of stormwater
Q = Min Vol Req / 172 800 sec (2-days)
0168 cfs
Required Area of Pipe for 2-day drawdown
A= Q/ [Cd x SQRT(2 x g x h)]
Cd= 06
g = 322 ft /s2
h = (T P elev - N P Elev ) /3
0 33 ft
A = 00604 sq It
Diameter of Pipe for 2-day drawdown
DIA = SQRT[(A x 4) / pl]
= 0 2772 It
333 in
Drawdown Calculation
Orifice Used=
2 5 in
Drawdown rate=
0 095 cfs
Drawdown time=
3 54 days
Outlet Structure Check
Using a 4 x 4 Basin
Perimeter L = 16 ft
Q = CIA
C = (% imp )( 95) + (1 % imp )( 25)
= 070
I = 7 23 in for a 10 yr Storm
A = 8 53 Acres
4319 cfs
Flow for 5 day drawdown
for Min Volume required of stormwater
Q = Temp Pool Vol / 432 000 sec (5-days)
0 124 cfs
nor o
A= U/[Gdx6QRf(2xgxh)]
Cd= 06
9 = 322 ft /52
h= (F P elev N P Elev) / 3
= 0 333333 ft
A = 00445 sq ft
Diameter of Pipe for 5 day drawdown
DIA = SQRT[(A x 4) / pi]
= 0 2380 ft
286 in
Q= CwxLx H1
H = [Q / (Cw x L)]213
Cw = 3
093ft
Peak elevation = Flood pool elevation + H
= 38 93 ft
16029 DENR Wet Detention Suppl B Pond 1 Calc 08 01 17 2 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stonnwater Pond Calculations
Pond 1
Storage Volume - Non SA Waters - Minimum Volume Required
Volume of Runoff = V = (3630) (Design Rainfall Depth) (RV) (Drainage Area)
where
Rv= 0 05+0 009(IA)
RV = Runoff Coefficient = storm runoff (Inches) / storm rainfall (Inches)
IA = Impervious Fraction = Impervious portion of the drainage area (acres) / Drainage area (acres)
IA= 638 %
Rv= 0624
Design Rainfall Depth = 1 50
Drainage Area = 853 acres
Volume = 28 994 ft3
16029 DENR Wet Detention Suppl 8 Pond 1 Calc 08 01 17 3 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
Pond 1
Average Depth Calculated
Permanent Pool Volume (ft') 178 295 0
Permanent Pool Area (ft') 55 307 0
Option 1 Average Depth (ft) 322
Bottom Vegetated Shelf Area (ft')
423440
Permanent Pool Area (ft')
553070
Bottom Pond Area (ft)
192690
Depth (ft)
40
Option 2 - Average Depth (ft)
335
Average Depth for use in Table (ft) 335
Round to nearest 0 5 for SA/DA (ft) _ 3 00_
16029 DENR Wet Detention Suppl 8 Pond 1 Cale 08 01 17 4 of 4

02/20/19
PGT
Total Drainage Area
s ft
acres
689 745 1
15 83
The Reserve at Palmetto Creek
Stormwater Pond Calculations
Pond No 2
Im ervious Area
Land Use
sq ft
acres
Proposed Building
224 320
515
Proposed Streets
75 721
1 74
Proposed Sidewalk / Concrete
19 243
044
Future Impervious
1 026
002
000
Total
320 310
735
atormwater t;alculatlons
Time of Concentration
Hydraulic Length (L) = 800 ft
change in Height (H) = 5 It
Tc = (La /H) 3e5 / 128
948 min
Flow for 1 year 24 hour Storm (01)
QPRE _ (CPRE) X (1) x (Area)
11 57 cfs
QPOST = (CPosT) x (11) x (Area)
44 73 cfs
Detention Pond Design
Does Area Dram to SA Waters? r n j
% Impervious = 0 464
= 46 4%
CPRE= 015
CPOST = (% Imp )( 95)+(1 % Imp )( 25)
= 058
11 = 487 m/hr
11o= 7 231 m/hr
Flow for 10 year 24 hour Storm (Qto)
QPRE _ (CPRE) x (110) x_(Area)
= 1717 cfs
QPOST = (CPOST) x (Ito) x (Area)
66 40 cfs
Stale Surface Area R6ninnRd nt nnrmal nnnl
Pond side slopes = 3 1
Depth b/w Bot of V S & 600
Bot Pool =
SA/DA = 00225
Chart for 90% TSS Removal for Wet
Detention Pond without Vegetative Filter)
Red SA = SA/DA x Total Drainage Area
15 519 sq ft
Provided SA - 58 956 sq It
Pond Size
ncr
i vN vi oenn
_ oo uv
r e1 0. uo1
1 uo 464
396 190
Top of Bank
3300
r 12 237
23
487
93 749
Temp Pool
31 00
; 50 433
0
290 706
Temp Pool
31 00
11 250
10
918
70 262
Top of V S
3100
,50 433
49 402
290 706
Perm Pool
a 3000
10 586
10
279
59 344
Perm Pool
3000
48 370+
50 171
241 304
180t of V S
2900
9 972
49
065
49 065
Bot of V S
2900
1
46 337
191 133
191 133
'Sed Elev
1 2300
6 383
0
0
'Sed Elev
r23 00
i 17 374 "�'
0
0
'Sediment Removal
Flevahon = 1 hinher
than Rnff
of Pnnr
Bottom SA = 17 374 sq It
Bottom of VS SA= 46 337 sq ft
Permanent Pool SA = 48 370 sq It
Vol = [((PP SA + Bottom VS SA)/2) x (PP at Bottom VS el )]
+ [((Bottom VS SA + Bottom Pool SA)/2) x (Bottom VS el Bottom Pool el )j
238 487 cu ft
Fore bay
Provided Normal Forebav Pond Volume
Bottom of Pool SA= 6 383 sq It
Permanent Pool SA = 10 586 sq It
Vol = [(P P SA + Bottom SA) / 2) x (P P el Bottom at )
59 392 cu ft Depth= 7 00 It
Required Forebay Volume it5% 20% required)
Vol = 20% of Permanent Pool volume of Pond and Forebav
59 576 cu It
Volume required to contain from design storm(ft')= 40 346
Therefore maximum sta a is between stages and cumulative volumes (main pond plus forebay)
Sta a
30 00
E
33 00
Total Provided PP Volume
= 297 878 cu ft
Actual % of Forebay Volume
= 1994
Using Interpolation to determine stage at volume = 40 346
Maximum Stage (feet) = 3064
Therefore set Temporary Pool Elevation at or higher than Maximum Stage
16029
16029 DENR Wet Detention Suppl & Pond 2 Calc 08 01 17 1 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
P
Provided Main Pond Storage Volume and No 2
Vol = [((PP SA + Top of VS SA)/2) x (Top of VS Elev - PP Elev )]
+ [((Top of VS SA+TP SA)/2) x (TP Elev Top of VS Elev )]
= 49 402 cu ft
Provided Forebay Storage Volume
�30 I Permanent Pool SA= 10 586 sq ft
31 ° Temp Pool SA= 11 250 sq ft
Vol = [((PP SA + Temp Pool SA)/2) x (Temp Pool Elev - PP Elev )]
= 10 918 cu ft
Total Provided Storage Volume
Vol = 60 320 cu ft
State Volume Req for Storage of first 1 5 runoff
Rv = 05+ 009(% Imp)
0 468
V= (Design ramfalp(Rv)(Drainage Area)
40 346 cu It
Outlet Structure Design
Flow for 2-day drawdown
for Min Volume required of stormwater
Q = Min Vol Req / 172 800 sec (2 days)
0 233 cfs
Required Area of Pipe for 2 day drawdown
A= Q/ [Cd x SQRT(2 x g x h)]
Cd= 06
9 = 322 ft /s2
h = (T P elev N P Elev ) /3
= 0 33 ft
A = 00840 sq ft
Diameter of Pipe for 2-day drawdown
DIA = SQRT[(A x 4) / pQ
0 3270 ft
- 3 92 in
Drawdown Calculation _
Orifice Used= 3 in
Drawdown rate= 0 136 cfs
Drawdown time= 342 days
Outlet Structure Check
Using a 4 x 4 Basin
Perimeter (L) = 16 ft
Q = CIA
C = (% imp )( 95) + (1 % imp )( 25)
058
1 = 7 23 in for a 10 yr Storm
A = 15 83 Acres
6640 cfs
Flow for 5 day drawdown
for Min Volume required of stormwaler
Q = Temp Pool Vol / 432 000 sec (5 days)
- 0 140 cfs
Required Area of Pipe for 5 day drawdown
A= Q/[CdxSQRT(2xgxh)]
Cd= 06
g = 322 ft /S2
h= (F P elev N P Elev) / 3
= 0 333333 ft
A = 00502 sot ft
Diameter of Pipe for 5-day drawdown
DIA = SQRT[(A x 4) / pi]
0 2529 ft
3 03 a1
Q= CwxLx H'
H = [Q / (Cw x L)]M
Cw = 3
1 24 ft
Peak elevation = flood pool elevation + H
32 24 ft
16029 DENR Wet Detention Supp18 Pond 2 Calc 08 01 17 2 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
Pond No 2
Storage Volume - Non SA Waters - Minimum Volume Required
Volume of Runoff = V = (3630) (Design Rainfall Depth) (Rv) (Drainage Area)
where
Rv= 0 05+0 009(Q
Rv = Runoff Coefficient = storm runoff (inches) / storm rainfall (Inches)
Ip = Impervious Fraction = Impervious portion of the drainage area (acres) / Drainage area (acres)
Iq= 464 %
Rv= 0468
Design Rainfall Depth = 1 50 in
Drainage Area = 1583 acres
Volume = 40 346 ft3
15029 DENR Wet Detention Suppl 8 Pond 2 Calc 08 01 17 3 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
Pond No 2
Average Depth Calculated
Permanent Pool Volume (fta) 297 878 0
Permanent Pool Area (ft') 58 956 0
Option 1 Average Depth (ft) 505
Bottom Vegetated Shelf Area (ft) 563090
Permanent Pool Area (ft2) 589560
Bottom Pond Area (ft) 173740
Depth (ft) 60
Option 2 Average Depth (ft) 441
Average Depth for use in Table (ft) 505
Round to nearest 0 5 for SA/DA (ft) r
16029 DENR Wet Detention Suppl B Pond 2 Calc 08 01 17 4 of 4

02/20/19
PGT
Total Draina a Area
s ft acres
460 070 1 1056
The Reserve at Palmetto Creek
Stormwater Pond Calculations
Pond 3
Im ervious Area
Land Use
sq ft
acres
Proposed Building
140 000
3 21
Proposed Streets
37 282
086
Proposed Sidewalk / Concrete
4 030
0 09
Future Impervious
0
000
000
Total
181 312
4 16
Time of Concentration
Hydraulic Length (L) = 850 ft
change in Height (H) = z 10 ft
To = (L3 /H) 315 / 128
7 79 min
Flow for 1 year 24 hour Storm (Q1)
QPRE _ (CPRE) x (11) x (Area)
= 7 72 cfs
QPosT = (CPOST) x (11) x (Area)
27 26 cfs
Detention Pond Design
Does Area Drain to SA Waters? n—I
% impervious = 0 394
= 39 4%
CPRE= 015
CPOST = (% imp )( 95)+(1 % IMP )( 25)
053
11 = 87 m/hr
110 = " 7'23 in/hr
Flow for 10 year 24 hour Storm (Q1ti)
QPRE _ (CPRE) x (110) x (Area)
= 11 45 cfs
QPosT = (CPOST) x (110) x (Area)
= 40 47 cfs
State Surface Area Reaured at normal ooni
Pond side slopes = 3 1
Depth b/w Bot of S 8 400
Bot Pool =
SA/DA = 00296
Chart for 90%TSS Removal for Wet
Detention Pond without Vegetative Filler)
Red SA = SA/DA x Total Drainage Area
13 618 sq It
Provided SA - 14 644 sq ft
Size
I op or banK
2O uu
, ,, +113 422
16 796
80 779
Top of Bank
25 00
3 250
2 964
16 069
Temp Pool
24 00, �>�`r
w1 �15 170 , r-
14 475
63 983
Temp Pool
2400
2 677
5 110
13 106
Top of V S
'23 00
413 780
12 996
49 508
Perm Pool
2200
42433
2 292
7 996
Perm Pool
r22 00
± �`12 211
11 278
36 512
Pot of V S
21 00 _
2 150
5 704
5 704
Bot of V S
00„g
r,110 344 ' r�
25 234
25 234
Sec Elev
1700
702
0
0
'Sed Elev
�21
17 002
273' _
0
0
Sediment Removal
Elevahon
= 1 higher
than Bott
of Pon(
SHGWT
`19 00
Bottom SA = 2 273 sq ft
Bottom of VS SA= 10 344 sq ft
Permanent Pool SA = 12 211 sq It
Vol = [((PP SA + Bottom VS SA)/2) x (PP el Bottom VS el )j
+ [((Bottom VS SA + Bottom Pool SA)/2) x (Bottom VS el Bottom Pool el )]
= 36 512 cu It
Fore bay
Provided Normal Forebav Pond Volume
Bottom of Pool SA= 702 sq ft
Permanent Pool SA = 2 433 sq ft
Vol = [(P P SA + Bottom SA) / 2] x (P P el Bottom el )
7 838 cu ft Depth= 5 00 ft
Required Forebay Volume 15% 20% required)
Vol = 20% of Permanent Pool volume of Pond and Forebay
8 870 cu ft
Volume required to contain from design storm(ft3)= 23 273
Therefore maximum stage Is between stages and cumulative volumes (main pond plus forebay)
Stage
Cuml
Volume
22 00
0
2500
52 340
Total Provided PP Volume
- 44 349 cu ft
Actual % of Forebay Volume
1767
Using Interpolation to determine stage at volume = 23 273
Maximum Stage (feet) = 2333
Therefore set Temporary Pool Elevation at or higher than Maximum Stage
16029
16029 DENR Wet Detention Suppl 8 Pond 3 Calc 08 01 17 1 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
Pond 3
Provided Main Pond Storage Volume
Vol = [((PP SA + Top of VS SA)/2) x (Top of VS Elev — PP Elev)]
+ [((Top of VS SA+TP SA)/2) x (TP Elev - Top of VS Elev )]
27 471 cu ft
Provided Forebay Storage Volume
I22 Permanent Pool SA= 2 433 sq It
23 Temp Pool SA= 2 677 sq ft
Vol = [((PP SA + Temp Pool SA)/2) x (Temp Pool Elev — PP Elev )]
= 5 110 cu It
Total Provided Storage Volume
Vol = 32 581 cu ft
State Volume Req for Storage of first 1 5 runoff
RV = 05+ 009(% imp)
0 405
V= (Design rainfall)(Rv)(Drainage Area)
23 273 cu ft
Outlet Structure Design
Flow for 2-day drawdown Flow for 5-day drawdown
for Min Volume required of stormwater for Min Volume required of stormwater
Q = Min Vol Req / 172 800 sec (2 days) Q = Temp Pool Vol / 432 000 sec (5-days)
0 135 cfs = 0 075 cfs
Required Area of Pipe for 2 day drawdown
A= Q/ [Cd x SQRT(2 x g x h)]
Cd= 06
9= 322 ft/s'
h = (T P elev N P Elev ) /3
= 0 67 ft
A = 00343 sq ft
Required Area of Pipe for 5 day drawdown
A= Q/ [Cd x SQRT(2 x g x h)]
Cd= 06
9= 322 ft/s'
h= (F P elev - N P Elev) / 3
= 0 666667 ft
A= 00192 sq ft
Diameter of Pipe for 2 day drawdown Diameter of Pipe for 5 day drawdown
E
IA = SQRT[(A x 4) / pil DIA = SQRT[(A x 4) / pi]
0 2089 ft = 0 1563 ft
251 in= 1 88 in
Drawdown Calculation
Orifice Used= ` 21m
Drawdown rate= 0 086 cfs
Drawdown hme= 3 14 days
Outlet Structure Check
Using a 5 x 5 Basin
Perimeter (L) = 20 ft
Q = CIA
C = (% Imp )( 95) + (1 % Imp )( 25)
= 053
1 = 7 23 in for a 10 yr Storm
A = 10 56 Acres
4047 cfs
Q= CwxLxH"
H = [Q / (Cw x L)I"3
Cw= 3
0 77 ft
Peak elevation = flood pool elevation + H
24 77 ft
16029 DENR Wet Detention Septet 8 Pond 3 Calc 08 01 17 2 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Stormwater Pond Calculations
Pond 3
Storage Volume - Non SA Waters - Minimum Volume Required
Volume of Runoff = V = (3630) (Design Rainfall Depth) (Rv) (Drainage Area)
where
Rv = 0 05+0 009(Q
Rv = Runoff Coefficient = storm runoff (inches) / storm rainfall (Inches)
IA = Impervious Fraction = Impervious portion of the drainage area (acres) / Drainage area (acres)
1"= 394 %
R, = 0 405
Design Rainfall Depth = 1 50
Drainage Area = 1056 acres
Volume = 23 273 ft3
16029 DENR Wet Detention Suppl B Pond 3 Calc 08 01 17 3 of 4

02/20/19 The Reserve at Palmetto Creek 16029
PGT Slormwater Pond Calculations
Pond 3
Average Death Calculated
Permanent Pool Volume (ft3) 44 349 0
Permanent Pool Area (ft) 14 644 0
Option 1 Average Depth (ft) 303
Bottom Vegetated Shelf Area (ft') 124940
Permanent Pool Area (ft) 146440
Bottom Pond Area (ft2) 22730
Depth (ft) 40
Option 2 Average Depth (ft) 283
Average Depth for use in Table (ft) 303
Round to nearest 0 5 for SA/DA (ft) _ 3 00 —!
16029 DENR Wet Detention Suppl 8 Pond 3 Colt; 08 01 17 4 of 4

Johnson, Kel
7e/�srorJ
From Johnson Kelly
Sent Wednesday, February 6, 2019 3 53 PM
To ptrlpp@trippengineering com
Subject RE [External] FW SW8 051045, The Reserve at Palmetto Creek
That isn't good I hope you feel better I will put this down for 2/20/19
Thanks,
Kelly
From ptnpp@tnppengineenng com [mailto ptrlpp@tnppengineering com]
Sent Wednesday, February 6, 2019 3 17 PM
To Johnson, Kelly <kelly p johnson@ncdenr gov>
Subject RE [External] FW SW8 051045, The Reserve at Palmetto Creek
o External email Do not click finks or open attachments unless you verify Send all suspicious email as an attachment to
re on ss am`i ncs ov
Kelly,
I got sick along the way and lost some valuable work time for everyone
Can you please grant me an additional two weeks?
Thank you,
PHil
From ptrlpp@tnppengmeering com <ptrlpp@trlppengineering com>
Sent Friday, January 4, 2019 8 44 AM
To 'Johnson, Kelly' <kelly p lohnson@ncdenr Rov>
Subject RE [External] FW SW8 051045, The Reserve at Palmetto Creek
Thank you too
From Johnson, Kelly <kelly P lohnson@ncdenr gov>
Sent Friday, January 4, 2019 8 41 AM
To ptrlpp@trippeneineering com
Subject RE [External] FW SW8 051045, The Reserve at Palmetto Creek
OK Let's revise the date to 2/6/19
Thanks,
Kelly
From ptrlpp@tnppengineering com [mailto ptrlpp@trlppengineenng com]
Sent Friday, January 4, 2019 8 29 AM
To Johnson, Kelly <kelly p lohnson@ncdenr gov>
Subject [External] FW SW8 051045, The Reserve at Palmetto Creek

u o External,emad Do not dick Imks onopen attachments unless you venhed Send all suspiaous email as ar(attachment to
fePOrt SRam[n1nC�kbV� }C+. *'� a:«`s`.e°?>.^r rc `9v^>'z r £ �. .t z' c n-
Kelly,
We are in receipt of your December 12 RFI correspondence for the Reserve at Palmetto Creek
We respectfully request an additional 30 days to resubmit
Please contact us with questions, comments or if you need additional information
Thank you,
Phil

Johnson, Kelly
From Johnson Kelly
Sent Friday January4 2019841 AM
To ptripp@trippengineering com
Subject RE [External] FW SW8 051045, The Reserve at Palmetto Creek
OK Let's revise the date to 2/6/19
Thanks,
Kelly
From ptripp@trippengineering com [mailto ptripp@trippengineering com]
Sent Friday, January 4, 2019 8 29 AM
To Johnson, Kelly <kellypJohnson@ncdenrgov>
Subject [External] FW SW8 051045, The Reserve at Palmetto Creek
e External email Do not click finks or open attachments unless you verified Seridalirsuspmous er'nad�a�stlan attachment to
Kelly,
We are in receipt of your December 12 RFI correspondence for the Reserve at Palmetto Creek
We respectfully request an additional 30 days to resubmit
Please contact us with questions, comments or if you need additional information
Thank you,
Phil
i

Johnson, Kelly
From
Johnson, Kelly
Sent
Wednesday December 12, 2018 11 20 AM
To
off ice@trippengineering com, buyhonzonhomes@gmail com
Subject
SW8 051045, The Reserve at Palmetto Creek
Attachments
2018 12 addinfo 051045 docx
Please see the attached Request for Additional Information
Thanks,
Kelly
K.eLLl�ohwsovi,'
Kelly Johnson
Environmental Engineer
NC Division of Energy, Mineral and Land Resources
Stormwater Permitting
127 Cardinal Drive Extension
Wilmington, INC 28405-3845
Phone [phone]
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

ROY COOPER
Gasernor
MICHAELS REGAN
Secretary
l?" > C�xrE�rsl�Ns ctreue
ry Qur�JN,p•
WILLIAM E (TOBY) VINSON JP NORTH CAROLINA
Interim Director Environmental Quality
December 12 2018
Via email only huyhorizonhomes(a)Qmaileom
KG Plara, LLC
Arm Mr Jack Carlisle, Manager
8620 River Road
Wilmington, AC 28412
Subject Request for Additional Information
Stormwatcrl'rolectiNo SW8051045
The Reserve at i'almetto Creek
Brunswick County
Dear Mr Carlisle
I he Wilmington Regional Office received and accepted a modified State Stormwater Management Permit
Application for the subject project on October 16, 2018 A preliminary in-depth revicw of that
information has determined that the application is not complete and that additional information is needed
10 continue the revicw, please provide the following additional information
General Which ruiC(S) are each pond designed under`) I believe you had told me that the pond(s)
had to be redesigned because they were constructed with incorrect elevations (i am not sure if
that was all three ponds, or just one or two of them?) I he impervious area for Pond 1 increased
by 36 011 sf, which could trigger it into a major modification to be designed under the 2017 rules
if the pond had to be redesigned to accommodate that new volume. The impervious to fonds 2
and 3 did not increase All three drainage areas remained the same All three ponds have been
designed for 1 5" as opposed to taking the previously -permitted impervious at 1 0", and so it
appears that you are designing for the 2017 rules? I Iowever the average depth equations and the
forcbay percentages appear to match the 2008 rule (18-22% of the whole pond) rather than the
2017 rule (15-20% of the main pond) Please advise [i have not vet compared the elevations in
the calculations against the elevations in the plans I have also not yet reviewed the design for the
2017 rules ( 1050/General MDCs for all SCMs, or 1053/Wet Pond SCMs), or the 2008 Rule
design standards I will do so upon resubmittal J
2 Project Area 1 15A NCAC 0211 1042(2)(g)(n)] Please provide dimensioned project or project
phase boundary with bearings and distances
3 Contours [15A \CAC 02H 1042(2)(g)(iv)] Please provide proposed contours and drainage
patterns Some spot elevations are provided, but the direction of the drainage is not clear for all
areas of the project Please provide contours in support of the drainage area plan
4 1 ypical 1 ownhouse Footprint [ 15A \CAC 0211 1042(2)(g)(v)] Please show the site layout for
all existing and proposed built -upon areas Please provide a typical townhouse footprint with
dimensions on this sheet or a detail sheet, and also clarifv which direction the downspouts will
dram
5 O&M Agreements 115A NCAC 0211 1042(2)0)J Please provide a signed and notarized
operation and maintenance agreement that meets the requirements of 1050(1 1) and (12)
D_E QJ� North Carolina Department of Environmental Quality I Division of Energy Mineral and Land Resources
Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington North Carolina 28405
/'� 9107967215

State Stormwater Permit No SW8 051045
Page 2 of 2
6 Dccd Rcstricuons 115A \CAC 0211 1003(7) and 1042(2)(k)] Dced restrictions have been
submitted showing that both the single family homes and the townhomes will have a maximum
impervious area per lot Will the townhomes have a `yard sold with them, or will the property
owner only buy the footprint of their unit in the building9 If there is no yard, then the townhomes
do not need to be deed restricted (because the owner doesn t own land to build any impervious
on) But, if there is a yard' please show the lot Imes for the townhomes on the plans in order to
specify where the deed restricted impervious is to be located for each townhome
7 Collection System 115A \CAC 0211 1042(2)(g)(vu)] Please provide the details of the
stormwater collection system including the inverts of the piped collection system
8 Wetlands \ote [15A \CAC 0211 1042(2)(g)(uQ] Please provide the boundaries of all surface
waters wetlands regulatory flood /ones protected vegetated setbacks, and protected riparian
buffers or a note on the plans that none exist
9 fond 1 Please ensure that all inlet pipes enter the pond through the forebay
I0 1 ypo Please check the incremc ntal volumes for Pond 3 for elevation 22
11 Supplement 1 15A \CAC 0211 1042(2)] Please email the supplement form to the email address
provided below so that it can be preserved clectronieally per the regulatory requirements
Please remember to confirm that any revised information is presented consistently throughout the
application documents including calculations, supplements, narrative, and plans Please also remember to
provide two hard copies of any updated documents per 15A \'CAC 0211 1042(2)
I he requested information should be received in this Office prior to Tanuan 6 2019, or the application
will be returned as incomplete If the project is returned and you wish to re -submit later, you will need to
resubmit all required items at that time, including the application fee
If additional time is needed to submit the requested information please e-mail, mail or fax your cxtension
request prior to the original due date to the Division using the contact information available in this letter
I he extension request must include a justification and a date of when the requested information will be
submitted to the Division Please remember that extension requests delay the issuance of the final
permit I he Division is allowed 90 days from the receipt of a complete application to issue the permit
I he construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of\CGS 143-215 1 and is subject to enforcement
action pursuant to \CGS 143-215 6A
Please reference the State assigned application number on all correspondence if you have any questions
concerning this matter, please feel free to call me at [phone] or email me at
kelly p johnson@ncdenr gov
Sincerely
5�
Kelly Johnson
Environmental Engineer
GDS/kpj \\\Stormwater\Permits & Projects\2005\051045 I ID\2018 12 addinfo 051045
cc Phil Tripp, via email onlyy, office@trippenpmeenng com
Wilmington Regional Officc Stormwater I ile