SW8950508_Historical File_19950613

State of North Carolina
Department of Environment, Health, and Natural Reso»xees
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT
Jonathan B. Howes, SecretaryBob Jamieson
WATER QUALITY SECTION Regional Manager
June 13, 1995
Mr. James M. Stallings, Jr. C�� l � �� � 3r©
MAR STAL Partnership5we,
345-6 Carolina Pines Boulevard Al.4 i ctw4-�
New Bern, North Carolina 28560 J4„ J
De, 101V
" Subject: CERTIFICATION OF COMPLIANCE
with Stormwater Regulations
Stormwater Project No. SW8 950508
Sand Ridge Apartments
Carteret County
Dear Mr. Stallings:
This Certification is pursuant to the revised application for Sand Ridge Apartments received on
May 15, 1995, with additional information received on June 6, 1995. Staff review of the project plans
and specifications has determined that the stormwater control system as proposed for Sand Ridge
Apartments will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1003(i). The
runoff from 75,136 square feet of impervious area will be treated in a detention pond sized to achieve
90 % reduction in Total Suspended Solids.
Any modification of the plans submitted to and approved by this Office or further development
of this site regardless of the fact that the modification may be less than 1 acre, will require an additional
Stormwater Submittal/Modification and approval prior to initiation of construction. Modifications include
but are not limited to; project name changes, transfer of ownership, redesign of built -upon surfaces,
addition of built -upon surfaces, redesign or further subdivision of the project area. Failure to obtain DEM
approval of revised plans prior to construction is considered a violation of this Certification.
This Certification shall be effective from the date of issuance until rescinded. The project shall
be constructed and maintained in accordance with the plans and specifications approved by the
Wilmington Regional Office. This Certification supersedes the one issued to you on March 17, 1995.
The developer is responsible for obtaining any and all permits and approvals necessary for the
development of this project. This could include the Division of Coastal Management under CAMA
requirements, the Division of Environmental Management under Wetland 401 Water Quality Certification
and/or a Dredge and Fill Permit and/or a Sewer Extension/Collection Permit, U.S. Army Corps of
Engineers 404 Wetland Permit, NPDES Stormwater Permit if disturbing five acres or more, local County
or Town Agency permits under their local ordinances, or others that may be required.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Stallings
June 13, 1995
Stormwater Project No.- SW8 950508
----------------------------------------------
A professional engineer must certify that the stormwater system has been installed in accordance
with the approved plans and specifications upon completion of construction. The attached certification
must be received in this Office within 30 days of completion of construction. Failure to provide the
Engineer's Certification is considered a violation of this Certification.
The detention pond must be constructed in it's entirety, operational for it's intended use, and
permanently vegetated prior to the construction of any impervious surfaces proposed as a part of the
project, except roads. Failure to construct the project per the approved plan is considered a violation of
this Certification.
3900.
If you have any questions concerning this matter, please call Ms. Linda Lewis or me at (910) 395-
Sincerely,
aiA
Dave Adkins
Water Quality Supervisor
DA/arl: S:1WQSISTORMWATICERTIEC1950508.JUN
cc: Gary Barker, P.E.
Garry Yeomans, Carteret County Inspections
Bradley Bennett
Linda Lewis
Wilmington Regional Office
Central Files

DIVISION OF ENVIRONMENTAL MANAGEMENT
PROJECT DATA
Projer Name:
Project Number:
Location:
Applicant:
Mailing Address:
Submittal Date:
Water Body Receiving Stormwater Runoff:
Classification of Water Body:
If Class SA, chloride sampling results:
Pond Depth:
Permanent Pool Elevation:
Total Impervious Surfaces Allowed:
Mite Area entering Pond:
Green Area entering Pond:
Required Surface Area:
Provided Surface Area:
Required Storage Volume:
Provided Storage Volume:
Temporary Storage Elevation:
Controlling Orifice:
Sand Ridge Apartments
SW8 950508
Carteret County
Mr. James M. Stallings, Jr.
MAR-STAL Partnership
345-6 Carolina Pines Boulevard
New Bern, North Carolina 28560
May 15, 1995
Newport River
„c„
N/A
4.0 feet
27 MSL
75,136 square feet
N/A square feet
91,840 square feet
6,514 square feet
7,100 square feet
7,592 cubic feet
8,014 cubic feet
28 MSL
1.25" pipe

WET DETENTION POND EVALUATION
1. Yes No The design storage is for the runoff from all impervious surfaces resulting from
1-inch of rainfall and is located above the permanent pool.
2. Yes No The permanent pool is designed for 90 % total suspended solid (TSS) removal.
Therefore, no vegetative filter is required.
3. Yes No The runoff completely draws down to the permanent pool in 5 days, but not less
than 2 days.
4. Yes No The mean depth of the permanent pool is a minimum of 3 feet.
5. Yes No The inlet structure is designed to minimize turbulence and short circuiting.
6. Yes No An appropriate operation and maintenance plan has been provided for the
system.
7. Yes No THIS PROJECT MEETS THE STORMWATER CONTROL REQUMMvIENTS
OF 15A NCAC 2H.1003 (g), (i), (k), and (1) (For Yes, 1 through 7 must all
be highlighted Yes.)
Brief Explanation: This detention pond is designed to remove 90 % total suspended solids without the
aide of a vegetative filter.
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN -OFF
Wilmington Regional Office
IS --TU A.,
Date
- & j-"
Individual Evaluating Form/Plans
Date - — Regidrial Water Quality Supervisor
cc: Applicant/Bradley Bennett/arl/WiRO/CF

befeti Abe)
DIVISION OF ENVIRONMENTAL MANAGEMENT
Submittal Form for Projects Using Density Limits for Stormw+ater Control
PROJECT DATA A l 1
Project Name Sand Ridge fi�'7%%7e/ll5
Location (County, Township/Municipality, Address, State Road)
Carteret County Newport Township Newport, NC
owner's New MAR-STAL Partnership
Mailing Address 345-6 Carolina Pines Boulevard
New Bern, NC 2$SG70
Phone Number 919-447-4492 Submittal Date 05-09-95
Brief Description (include map and appropriate drawings) Sand R i djze
Apartment Complex
Name of Water Body Receiving Storm+ater Runoff Newport River
Classification of Water Body SB
State/Federal Permits/Approvals Required (Check appropriate blanks)
CAMA Major Sedimentation/Erosion Control X
404 Permit DEN/DHS Sewage Disposal
Other (Specify) _
CALCULATION OF BUILT UPON AREA STORMWATER
Built upon area means that portion of a development that is covered by impervious or partially pervious cover
including buildings, pavement, recreation facilities, gravel, etc., but not including wood decking. if the
project includes areas draining to different water classifications, please note them separately below.
Subwatershed Subwatersfibd D
. D
Classification MAY 5 1995
Built Upon Area
Total Project Area 1 A 8
% Built Upon Area - Q E. M
Allowable B/U Area 30 7.—
Is the Project B/U Area <_ the Allowable B/U Area? No (if no, 'an"engineered system is required.)
% Built upon area = (built upon area / total project area) i 100
Built upon area limits for projects to meet density: SA waters -- 25%, Other -- 30%
STORMWATER CONTROL MEASURES (Grassed -line swales should have side slopes of 3:1 CH:V) or less)
Describe how the runoff will be treated Streets and parking are curb and g 1 e , water ig
collected in slotted drains and released to the stormwater pond before discharge
into Town of Newport Stormwater Collection System
SUFFER AREA
Is the built upon area at least 30 feet from mean high water of all surface watersz Yes if no, please
provide a description
resu�m f fed

DEED RESTRICTIONS AND PROTECTIVE COVENANTS
By my signature below, I certify that the recorded deed restrictions and protective covenants for this
project shall limit the allowable built -upon area per lot to ' NZA square feet inclusive of
right-of-way, structures, pavement, walkways or patios of brick, stone, or slate, not including wood
decking; state that the covenants will be binding on all parties and persons claiming under them; that
they will run with the land; and that benefits may be enforced by the State of North Carolina,
therefore, the covenant cannot be changed or deleted without consent of the State.
CERTIFICATION
I, James M. Stallings, Jr. , certify that the information included on this submittal
form is correct, that the project will be constructed in conformance with this information, and that
to the best of my knowledge, the proposed project complies with the requirements of 15 NCAC 28.1003(b).
I authorize the below named person or firm to submit stormwater plans on my behalf, and agree to abide
by the deed r
Provide authorized person or firm name and address below:
Gary C. Barker, P.E.
Barker Engineering Service
P. 0. Drawer D
New Bern, NC 28563
I ly. 4M12_"'w
County f� , do hereby
appeared before me this _ day of ��,//
foregoing instrument. Witness hiwd 'd oft
• s�°° _ P fl
OTA
RIO
My commission expires
_, a Notary Public for the state of North Carolina ,
certify that ,James M_ Stall ijjRg Jr personally
19.2,5-and acknowledged''the due execution of the
ial Seal,
13
�e
cou
za�uuurs�s
R
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN —OFF
Regional Office
/ 3 JOAJ 95
Date � � � In 'dual Evaluating FG�Plans
Date Regional Water Quality Supervisor
cc: Applicant/Bradley Bennett/Consultant Rev. 12/93

J,
Streets will be curb and gutter, with water collected -to catc a... ;unoff
�
will pass through the Filter Basin or the Stormwater Retenti di
and before ;charge
into Town of Newport Stormwater Collection System. Stormwater controls maintenance
will be performed in conjunction with the Plan for Sedimentation Control and will
include the following:
The stormwater retention pond will be inspected at least twice yearly to ensure
that the structure is operating as originally designed.
Inspection priorities will include checking the embankment for subsidence,
erosion, cracking and tree growth; the condition of the emergency spillway and
drain; the accumulation of sediment; clogging of the riser and outlet; and the
adequacy of the channel erosion protection measures.
The side slopes will be mowed at least twice yearly to prevent woody growth and
to control weeds. Regrading and revegetation will be performed as necessary to
correct any slumping or erosion of the slopes.
after every runoff producing rainfall
The trash rack and orifice will be inspected'every-thLOO M011hi and debris and
litter removed as needed to keep the riser from becoming clogged.
The stormwater retention pond will be cleaned out when the sediment in the pond
reaches one foot of depth. q
All grass swales will be located within easements.
Grass swales will be mowed every three weeks during the growing'season and will
be checked and mowed as needed ona monthly basis during the winter months.
Sedimentation in the swales and catch basins will be inspected and removed
every three months.
The sediment basin will be inspected every three months, and will.be cleaned
out when the %==z4--4wp= depth is reduced to
3' below permanent -pool elevation.
Any eroded areas will be filled with top soil, reseeded, and mulched as often
as necessary to re-establish an erosion resistant turf. TL®
STOIqWfDD
I, James M. Stallings, Jr., certify that the above project will b Q
conformance with the above information.
MAY 15 wt
er's Signature ate -� Q E M
PILO, I#„ 3 I CEO t
� 5�u8 9sysa
I. 4Q- V a Notary Public for the State of North Carolina, County
of cr ven, do i:ereby certify that James M. Stallings, Jr. personally appeared before
me this ao day of Ja-pvavp,,,1995, and acknowledges the due execution of,the
foregoing instrument. W,W Vko and official seal.
f r
_ _ .
Do
My commission expires '- ,� /99e
�� .....-v y ,, 1
001.1N0 r"ewbm,14 ec�
�l JI111„1,1,

IjIV ' `J1. AI:NTAL hfANAGHr* Nr
DIZINS11.11
_. - MAR 0 3 1995 .ENGINEERED —
PROJECT DATA ... ft.*.... 4...
�O�I���M��N
Project NameSand Ridge
Location (county,'rowii,%hip/*Aunicip,tlity, Addr4,.s, ;fate'Load)_ Carteret %gun ty
_ Newport Towns hiu,__Newport NC... �_...
Owner's Name MAR— S TAL Partnership _—+�
NlailingAddress 345-6 Caroling Pines. B.. yard
..-_ ..... Q>tit.�
New Bern, NC 2
PhokeNumber 919-447-4492 Submittal Date Q-20 94
D-rief l)escription (inclucle map turd al)propriate (itttwings) 22__ acre+ single family
and apartment rest ent .a1-_dgaC1 o
Naine of Water Body Receiving Storrnwater-kimoff N_eyZpor.t Ri .r
(:lassification of Water Body ._ _ )t SA waters, engineered system, and distance is <0.5
Miles, attach report of chloridesampling
sampling results_ _ _—.— —mg/1
-StateiPederal Permits!Approvals Inquired ((.'heck appropriate blanks)
C:.AMA Majc>r,._.._......_ Stdirar:ntation/Erosion Control- X _
404 Permit _— DEM/1)(IS ,S,ewage Disposal__,__ --
()titer
CALCULATION OW BUILT UPON ,AREA
Built plum area means that portion of a development that is covered by impervious or partially pervious cover
including buildings, pavement, recreation facilities, gravel, etc., but not including wood decking. If the project
includes areas draining to different water classifications, please note them separately below.
,Subn,-atersketl
(;lassificatioh
Built upon area
't"otal Project Area _.._._ 2
'Y Milk upon Area
,\Iluwable BJJ Area
ILitw-4gAlted
.� ac —7.71 ac
.0 __.ac 22.0 ac
resubmiffed
3 -3- 95
Is the Project: B/U Area 3 the Allowable l3/U Area? _ (if no, an engineered system is required.)
% Ewilt. upon area - (built upon area / total proju:t area) * 10)
liti lt. upon area limits for projects to meet density: SA c-,.iters --- 25%, Other ---30%
STO11-\ll WATER (0i1L ('T1(.)N S't S31 h1
l)er;.:riixc: haw the runoff will be treated Streets are curb &_gV-uer- water
is collected inton
,catch..bas g.-,and piped —or drai�.ed-by..grass.�____.
swales to the Filter Basin or Stormwater Retention Pond before
dxscira ge__I.F owt _sf iV� oxt. zStQrrmwaLer CollPaLim-.SysiLem---

Bill:rlTR AREA
is the built upon are4 at least 30 feet from mean high water of all surface waters? Yes If no, please
provide a description___-_-____
(Note: Only boat ramps, public roads, public bridges, and walkways to water related facilities are allowed
within 30 feet of the mean high water line if il-ie project is intended to meet stormwater control
requirements through density limits.)
DERD RWIMICTIONS AND PROTECTII'dl+: COVENANTS
By my signature below, I certify that the recorded dc•u,J restrictions and protective covenants ;for this project
small limit the allowable built -upon area per lot tv * square feet inclusive of right-of-way,
structures, pavement, walkways or patios of brick, stone., or slate, not including wood decking, state that
tbe. covenants will be binding on all parties and p�t-suns claiming under there, that they will run with the
land, and that benefits may be enforcetl by the Stale of North Carolina, therefore, the covenant cannot be
cllango or deleted without consent of die State.
*Lots in Drainage Areas 1 = 1,950 Lots 1 thru 20
CE:ft,j3FJCAT1oN *Lots in Drainage Areas 2 & 3 = 2,300 Lots 21 thru 83
1, James M. Sta l l ids , Jr. _ , certify that the information included on this
submittal form is correct, that the project will be constructed in conformance with this information, and
that to the best of my knowledge, the proposed project complies with the requirements of 15 NCA.0
2M.1003 (b). I authorize the below named person or firm to submit stormwater plans on my behalf, and
agree to abide by the deed rest^6tlo�erl nr. Ahi
Provide authorized person or ftrin name and
James M. Stallings, Jr., partner
P. 0. Box 778
Havelock, NC 28532
le -�?a -�
I)ate
elow:
MAR-STAL Partnership
345-6 Carolina Pines Boulevard
New Bern, NC 28560
,a NotaryF'ubljc>it'ttLot North Carolina ,
County of . _, do 1►k:reby certit,�'tltt•.e3aines M. ' tailings, Jr. personally
apiwared befo a me this _ ay of October= Eve'•',,�- 1W acid acknowledges the due execution
of tt►e io g ng instrument. W' he5s illy h:ul(1 and Off Zt.r,\ ` U
%� .� V� •
--_ _ P
My commission expires �/ _��� ___--- ''•••••••'4��:`
C?AV Et%
'ej••eeee.ee•,
T1MSION OF ENVIRONMENTAL IM4Ac;Ei< ENT SIGN -OFF
Regional Offfice�y
7 fYl 15
Date
Date,
ividual Evaluating Yorttpjlarts
Water Quality Supervisor
cc: ApplicantMRO/Bradley Bunnett/Ce:nual files

OPERATION AND rNTENANCE PLAN 119ITT V
SAND RIDGE D
JAN 2 51995
Streets will be curb and gutter, with water collected to catch.bAal",...�.11 noff
will pass through the Filter Basin or the Stormwater Retention Pond before discharge
into Town of Newport Stormwater Collection System. Stormwater controls maintenance
will be performed in conjunction with the Plan for Sedimentation Control and will
include the following:
The stormwater retention pond will be inspected at least twice yearly to ensure
that the structure is operating as originally designed.
Inspection priorities will include checking the embankment for subsidence,
erosion, cracking and tree growth; the condition of the emergency spillway and
drain; the accumulation of sediment; clogging of the riser and outlet; and the
adequacy of the channel erosion protection measures.
The side slopes will be mowed at least twice yearly to prevent woody growth and
to control weeds. Regrading and revegetation will be performed as necessary to
correct any slumping or erosion of the slopes.
The trash rack and orifice will be st ect dry runoff producing rainfall
P 'erg es-}rs and debris and
litter removed as needed to keep the riser from becoming clogged.
The stormwater retention pond will be cleaned out when the sediment in the pond
reaches one foot of depth.
All grass swales will be located within easements.
Grass swales will be mowed every three weeks during the growing season and will
be checked and mowed as needed on a monthly basis during the winter months.
Sedimentation in the swales and catch basins will be inspected and removed
every three months.
The sediment basin will be inspected every three months, and will be cleaned
out when the level of sediment reaches one foot of depth.
Any eroded areas will be filled with top soil, reseeded, and mulched as often
as necessary to re-establish an erosion resistant turf.
I, James M. Stallings, Jr., certify that the above project will be maintained in
conformance with the above information.
fu
2.27_95ere ate/. t,-a a Notary Public for the State of North Carolina, County
of Craven, do hereby certify that James M. Stallings, Jr. personally appeared before
me this .20 day of JApmdey��,� 1995, and acknowledges the due execution of the
•��'�%foregoing instrument. Wi,
q,o and official seal. Ell
XAOTA�' `
E 9 V EI I
Q
My commission expires ea /99ou � LJ
F,y'•....AJA 1 JAN 2 5 1995
�xor �3100(0

SAND RIDGE
This project is located in the Town of Newport. It contains
approximately 168,000 square feet. All surface waters will be
collected in a storm water control pond and treated before they are
discharged to the existing ditch along the southwestern property
line. The property is primarily cleared at this time. The first
step of construction will be to construct the storm water control
structure in conjunction with clearing and grubbing. Next the site
will be rough graded. Underground utilities will then be installed
and a temporary ground cover of rye will be planted. After
construction of the apartment buildings is completed, final
landscaping and permanent vegetation will be established. It is
expected that from beginning to completion of site work will take
180 days. Construction of the buildings will take 8 to 10 months
from the completion of the site work.
For the ten year storm calculations 6.6 in/hr. was utilized. For
paving and concrete a coefficient of 0.95 was used. Roof areas were
assigned 1.00. Grassed areas were assigned a "C" of 0.20. It is
expected that volunteer vegetation will grow and provide enhanced
treatment in the forebay and safety shelf areas. The pond was
designed with SA/DA.ratio in mind producing only a one foot rise
with a one inch storm. An orifice 1.25 inches in diameter will
release this storm in three days.
1

Storage Required for Stormwater Retention Pond
Q - CIA
C = Weighted runoff co -efficient
I = 1 inch per hour
A = Drainage Area in square feet
C x
Roof Tops 1.00
Paving 0.95
Grassed Area 0.20
Determine Pond Size
I x A
.08333 28,800
.08333 43,560
.08333 95,640
168,000
CF
2,400
3,450
1,600
7,450
Roof Tops 28,800 sf 72,360 = .43 impervious
Paving + 43,560 sf 168,000
Impervious 72,360 sf
SA/DA - > 90% TSS REMOVAL
FOR WET DETENTION WITHOUT VEGETATIVE FILTER
per Water Quality Section NC DEHNR
Imwer $
3.0'
3.5'
4.01
4.5'
5,01
5.51
6.0'
6.51
7.01
7.51
10
1.3
1.0
.8
.7
.6
.5
.4
.3
.2
.1
20
2.4
2.0
1.8
1.7
1.5
1.4
1.2
1.0
.9
.6
30
3.5
3.0
2.7
2.5
2.2
1.9
1.6
1.3
1.1
.8
40
4.5
4.0
3.5
3.1
2.8
2.5
2-.1
1.8
1.4
1.1
50
5.6
5.0
4.3
3.9
3.5
3.1
2.7
2.3
1.9
1.5
60
7.0
6.0
5.3
4.8
4.3
3.9
3.4
2.9
2.4
1.9
70
8.1
7.0
6.0
5.5
5.0
4.5
3.9
3.4
2.9
2.3
80
9.4
8.0
7.0
6.4
5.7
5.2
4.6
4.0
3.4
2.8
90
10.7
9.0
7.9
7.2
6.5
5.9
5.2
d.6
3.9
3.3
100
12.0
10.0
8.8
8.1
7.3
6.6
5.8
5.1
4.3
3.6
Actual % = 43%
Interpolate between 40% and 50%
Pond Depth of Permanent Pool = 4
SA/DA must be 3.8 or greater
Minimum SA = .038 x 168,000 = 6,384 SF
2

DESIGN OF POND
Use 4:1 side slopes
SA @ 27' elevation = 50 x 140 = 7,000 sf
SA @ 28' elevation = 58 x 148 = 8,584 sf
Pond has slope of 4:1 above 27' elevation, assuming 1' rise
calculate storage of pond using average end area method to
determine volume.
'Calculated volume = 7,792 cf
Required volume = 7,450 cf OK
Permanent pond has area 7,000 sf > required 6,384 sf for SA
OK by storage volume and SA/DA surface.area calculations.
DESIGN OF ORIFICE
Q(2 days) - 7,450/172,800 = .0431
Area = [.0431/.6 2(3a 2.2).5]144 = 1.823
Radius = 1.8� 23/x = .76"
Diameter = 1.52 "
Q(5 days) - 7,450/432,000 = .0172
Area = [.0172/.6 2(3� 2.2).5]144 = .7294
Radius 7294/n = .4818"
Diameter = .964"
Use orifice 1.25" diameter
Actual drawdown time 71 hours 20 minutes OK
2

Outlet Design
Rainfall Intensity 6.6 inches/hour
2=CIA
C = Weighted runoff co -efficient
I = 6.6 inches per hour
A = Drainage Area in acres
Roof Tops
Paving
Grassed Area
C x I x
1.00 6.6
0.95 6.6
0.20 6.6
A =
CFS
.66
4.4
1.00
6.3
2.20
2,-2
13.6
Figure 4-16 pg. 161 ARMCO Handbook of Steel Drainage
See copy on next page
Use 24" CMP
Invert 27.0' + 2' of head = 29.0' max elevation of pond
4

�T� � /t-I�i� - ��•h-,,% �-�2 � h �,.� owe ��f� / ��
01. ees)4� o f- :5
LASrU,-7 IS /0&1�
O'-ells,
per -son t S
�.
Sf2(l� s. Neeo(
rev,h. Fes,
�,
a��e
s� fs o , 5 —
2 fhe L
Q,
1 1-e 25e.
L 1 -�/ -
1 MO/-.2 � Thy Gl1� �J���QG/ PO-7d w�Il /e
_sAow 5W o/e ose
5�1(aW
ii�
(2
$ ,F'/C�r,�S �Yr�oa)5e 2
� -S -thy s c ,-,r E c. 2 c>,
c h2 s il? s P zse
2ss ca✓2r �� of �f�
tic,�e d,,7 --P// roo f ,Zt- -Z�
rriu S� bo- dt"recfed fv flee ;�-,�, n Iv��c f;.-1S�
-r 5UJ 2l2 s t m u CCU v UCt2 i -fi r -e-f'i /2 l
po er -a b.,M ft iU aa-15f. of Imp Surfzc es.
aIC S
Sohct v s,*on . z I ce, 4 fcr 83 k,fS, r7C,c6 S(D lad
umr rn 2 s e rem se 1Uu.m e� fhc
- SiNa�-e5 iu CGr'r.PS ���� r VeIUC4,1� cza/Cs
r
(() I V�(oG t -1, re / -FIcxA.) Spre 2.Or er- mer_h an, -s m c(e��.
cU,I k ur- , cv7d(,
;-) 0 lc7f- Z7 how txj d / -0k- ro i a ff u.e.4 f) e ,Sw a/e Z
z� p (Uf 35 gr 3(p
zlf y c b ff � 2 crvs s ,-a 2c( , ;„�

t sw zl e s (C),l f- -z.l -zv- 31
-
Sw..
Icloco Fr-orn o-Mew--A-.Qas urferl�cJ. _..__...
G2- 13 I&s sez( am _l ;s �n._r.zble.?�eas_�-
yl�G clear, r�12b1��'�n�s,
CU5ZC. ra J4i co -.7n S
i( 21, -e1� or W • 1
i!) kk zl tl 8 vV
seefrz P -a(� e
cm Sw ale m -7 f -a� C
'_.. 3��_ ..

5M
en 5, on 2 1L5
sF h7012 i m err' u 5 .
Z�L Coy Uur^ i jX17 C( Z
Z 5e4s o-r reveSecl of z,5
ram,',
42 yv x 88 Su.lol► �4s
Cl 20 Cv
�- 0 x �52 x 2
CZ4 x 4k, 3Z x 8X
` C7 Ic�b
Zvi 52 "� 7�rm W --l- ket re� en A'cx7 oLd- Wk Z17
de,o� h s re-juced fb ,2 rm2neA-k Da-C
�I�rzhw►.
4 25Cc� r
G� 13C� x S 2
1400 S23v

Cu.1-O.(e - 5ac 7 _ ck�(oil_ elovl&)s e -s �e a/,
oo d ew- road 0117 h cr�j � 5i 0� 2. a&,(2. 54
rvw ry aa( Z
�r�rok 3 5hacc3 0(/ .easem -e44 !k (vGzh cam► s W,*4# s, o U �r
v rr� �% f
1�
Vrelv.�� shod c, �Cu. -� ,. �� C017 sku6i 0
b '�ri 1� �M _ fin . e GU z -tee
OU40-f s fruclw.
rv.,r�m no7 r-ecelve.d,
1j i�a-MG e Z
a/ /ea Sf 2U 1
wh �f
tee: o�
Z
_ ftie
Ifufs ,
Prec>usf
vsed
Q(e�oeQ
c� -07
Q 5 TEA'( 4 4- Z 3 00 -- r-� � f
GUr,��t5�o�i ntq -�Z�s ��1 er I c(SU mr Z 3 0U ,
A
IUUmla r 1v S ho-� alone -
p,4-Za3�.
90 G �p M p ;o doe S i7q-� S I ow re , , G11 �
I- Cllf) Check 5r /e qr'e a --a . ' ? 3,.=¢Zac v s . 19. 11 2c- -
p)-Oje4 2ve� on sob -Pooh � ZZ.00 C2�nr - vse o e�
i s 2ce�n _ P rc�. _area 1-F �k zf s �e rvvi des i s oUL) n
s%armW 2�Q.r. Cvnivi, 5�. �`�1� 'does rio--f ►h Cleide-
15 if w UtluSQa �. Hu5f use_ 1' a Goyve,rt:
v 'Zj Gp7 1 p ►�7?��c�� .Z
q.5_—_... C`l"MPnS•cs7S,
t�sd� . l ?l - q25 90244 /P,2ek,1j
c

M
5-.ald- i7,w 519
tcc)cp
SGu 2'e- /O c a h c115 p�; f'e,'P� 2 Jrlo�v On -M i -S
2
(3 5 1 F/:;-67.S CA)k 1�,h d,-�CAP5 22�4e-
v wh i c17 �Ye.
(4)hare vre C2%c5 m;n;mum
oil,
JJ Jixve
� 2
eoyr, 2h2nT ol - ;755 {v he z5, cv
C111-1-ci7 's,.
_ e- GCY' V/ Srorl where cle' s i
I s hie � �Ju"I __Cur h c�,���- i s U. Sea, YCU We_
a
pro 541A so -the. -Gb& J - +c hes -rlo w ?
ir` la fh� O peed not rn eel_ 5fo/e re.� u rrefn ef-7 s
PW
qr norl - ewro 5`✓el velloct.*
�h8l 4L Tr2c �W2�eS
is now irecfeol 1/1`2 2 co�cr�fe
ill-6 4h e /00nocl, -mac Ih,1'5 is 34, buf f °hv p,.,? -YL
of oni-i- i n 4D fhe Aon cl rn u5 f be re.lo c o�ecl o Y%e
JShort -c; l-c.0 h nc�, ) e. w►'/ I
Puc) pose Q41 i,� w� I f ca-case i n cam► , �I r u 24r _ � be
&'�(.eJ1 501T Oit� Vi'2 the GLk+)e. 5�-uc/ure f Qk
2 20�0►, 7� U�! a i C:U S w a le s pr p ®S e _Tp-P, -;YS
That „r-A 3 uj,/I ho� ve 2 more- IC sw:a es,

Io1
Ir'U' 5w 2/e5 C grind- u5ed ai-f o-� sp why le
PO4 5 U5ec+ rn 2no4n-Pr Vh les3 Oro C� Gin-e-e/"S
�i
b efl-4- 16 h-e c%
�le 2 5e n urn her -fh e /ots �Jre �•�- �G wr1
21 lG w 2 btu L5/ (, per 10-f b25 e d aV7 10�- vmn 6rs,
r24ha- 4hv�-7 Ph 2se.
Gusc;�- n u n ber- lvfs res 1b'a�,e j Z? cx) o f q5(
Ouale jn �,�c r ) W1 CC.Irr4e5p, to � a um %5.
--Ile l0�5- /- 00 gre / qso s -r
JOJ5 zcFs o-e z3s do�
I + Deu s C ob Qv- -F - , , i'o se.. W
beef
_ 5U �1 f Y.� S G✓�'� f�Y Zvi i1 �
ISO /J a4 2SS U,! �sie
_ C21CUI a an
5w moles ? L ahe( --'.u.Ote5 Ct'e velar; � czlcO
j Z L e b4e I -,-A �tlV g,i'f5 of --Aa Z5 I CZILCi b z S i..I -5.
5[ruc-&t(ewd sechul_def
on Rice" -51ze.
�-s
� z
t i, Or�� e 2S es�� Or/ /cJ7 e -5

�O 52f 5 f ���ris. 2rex rey. 17 o
:25e 244 4� m 4 6 cu(- de - 5zc sec.�)""7
do —A (s h? 1 gws os cl� Fcl- )Ivyc� e,-ovac(
FI2W)s.
Ph
YiA
qq
C �
he, —A fOrn e,�
3O-t- -90)
O.q � ;z- �
z,. 5 K a-v) 4-
- ----- 1 c 5 4-3. q
�2 (3, 0 Six 1.59)Cab )
213�(ov
Z x
So ole s PA f, 4-jr3d
03�3 1�37 s
/ Uoo S4S -

C2o SO 4Fo gdf,gr
LT4
IZ,S� Fo = /004'
4.8O = 3ZF,
CU/ ow/e ac -3e -;ZO) iZ
.3 &45 / 26 = q4 770
- Z Z4- -K Z
31Z�2�O
Z90 13
13& /3
95 4 Z6
�sP�zc�
L,45
f / i
x Z = 203G
op
(zo-F OG-,)
;?F � 36 = Z S 3 �4
3.3 � ZG _ r z 93
/ZZ- -,e Z /S Z 37 Z62,q
= 132E 352.
�¢�,_q5o

g310C,)(o � SLR -10 -94-
1. PcanJ- cle5i5 n -l-o inc(uue Secfio,l T 2
hleec1 hofA*- cxc�le� sf7vchw-e
�Y�SI't r�;ac%, �eryew7cysfllw�y,
Cu - c/e - s 2c
q., Wh-4- J s 4l ov e toPm 4&-7f /cx z/.e c/ ag5 f of c P I L 2` (A) 2
Co. Dell-4 a afe -Z 1(q7J24E,1 pohG( cop kvrs .. —s _ e cl
_ fke bof4om f-meaer�i ,p (r f des,- n fo(�t
0 y
'7. Q ole e oL re5 fh c h vn fu- 4h e. -- /o4s .
PrGV►de
2 $
M Rl�r►,
g.
5 'I

Outlet Design
2 year 30-minute rainfall 3.2 in/hr
Fig. 4-3 Page 140 Handbook of Steel Drainage
Time of Concentration
Fig. 4-6 Page 144
Conversion Factor
Grassed Swale 890 1.0
Pipe 30 ft 0.2
Curb Line 400• ft 0.2
Overland 180 ft' 2.0
Distance to enter figure
Difference in grade 5.0
therefore 17 minutes TC
STORMWATER
SEP 2 7 1994
NCO D E M
"ROJ M 4 3�abfe
Equiv. Length
890
6
80
36Q
1336
N Page 141 Chart 4-1 gives conversion of rainfall due to time of
concentration (a) and Chart 4-2 gives conversion design storm
years . (b)
Rainfall. intensity X(a)x(b)-Adjusted intensity
3.2 x 1.36 x 1.6 - 7 inches
Q - CIA
I ­7 inches per hour
A - Drainage in acres
C = Weighted runoff co -efficient
Road areas
Parking lot
.Impervious surfaces
(per home site)
Apt. roof,area
Pervious soil turfed
Figure 4-18 pg. 161
A x I x C CFS
1.67 x 7 x .80 = 9.35
.87 x 7 x .80 = 4.87
3.23 x 7 x
.66 x 7 x
15.57 x 7 x
.75 - 16.96
.75 _ 3.47
.03 - 3.27
37.92
30" pipe 37.92 CFS 1.5 HW/D
1.5 x 2.5 - 3.75
Grad: = 24.3
Surface 28.05
Storage in Stormwater Control Pond
Cubic Feet -Area x C x Rainfall Cubic Feet.
Road Area 1.67 .80 .0833 4848
Parking lot 0.87 .80 .0833 2525
Impervious Surfaces
A homesite) 3.23 75 .0833 8790
Apartment Roofs 0.66 .75 .0833 1796
Pervious Soil Turfen - 15.57 .03 .0833 2695
19# 654

System designed for 2.01 rise in storm
2010 Lineal feet of swale
Average elevation of bottom of swale 25;7
I o .4
7
Needed
By Swale
cu ft
P-
e-
13 , 5-S %i-
19,654
1,1.588
5p976

State of North_ Carolina
Department of ]Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
May 18, 1995
Mr. Robert H. Davis, R.L.S.
Surveyors and Planners
7175 Highway 70 East
New Bern, North Carolina 28562
Subject: ADDITIONAL INFORMATION
Stormwater Project No. SW8 950508
Sand Ridge Multi -Family
Carteret County
Dear Mr. Davis:
The Wilmington Regional Office received a Stormwater Submittal for the Sand Ridge Multi -
Family Tract on May 15, 1995. A preliminary review of that information has determined that the
submittal for the subject project is not complete. The following information is needed to continue the
stormwater review:
1. Mr. Barker's' North Carolina registered Professional Engineers seal is totally faded out and
illegible on the plans.
Z2. On the back of the submittal form, please replace Mr. Stallings name with Mr. Gary
Barker as the authorized person that is submitting the plans on Mr. Stallings behalf.
Original enclosed.
3. Please note on the plans that the detention pond must be constructed in it's entirety and
vegetated prior to the construction of impervious surfaces.
/%4. Please delineate and label the 28 contour in the pond.
✓5. Please dimension the buildings, parking lots, and drives. I calculate approximately 4,000
square feet more impervious area than you do. Include pavement corner radius.
✓ 6. Please provide two sets of revised plans.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Davis
May 18, 1995
Stormwater Project -No. SW8 950508
----------------------------------------------
✓ 7. Please revise the Operation and Maintenance plan concerning the cleaning of sediment
accumulation from the retention pond to read, "...cleaned out when death is reduced to
3' below permanent R001 elevation." The original Is enclosed for your convenience in
malting this revision.
Please note that this request for additional information is in response to a preliminary review. The
requested information should. be received by this Office prior to June 18, 1995, or the submittal will be
returned as incomplete.
If you have any questions concerning this. matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\950508.MAY
cc: Linda Lewis
Central Files
F)

�• is �\ i V: \ �\:1 :1 III �--+ V
Streets will be curb and gutter, with water collected.to catch
.... ,.runoff
a
will pass through the Filter Basin or the Stormwater Retenti nd before discharge
into Town of Newport Stormwater Collection System. Stormwater controls maintenance
will be performed in conjunction with the Plan for Sedimentation Control and will
include the following:
The stormwater retention pond will be inspected at least twice yearly to ensure
that the structure is operating as originally designed.
Inspection priorities will include checking the embankment for subsidence,
erosion, cracking and tree growth; the condition of the emergency spillway and
drain; the accumulation of sediment; clogging of the riser and outlet; and the
adequacy of the channel erosion protection measures.
The side slopes will be mowed at least twice yearly to prevent woody growth and
to control weeds. Regrading and revegetation will be performed as necessary to
correct any slumping or erosion of the slopes.
The trash rack and orifice will be instect dry runoff producing rainfall
litter removed as needed to keep the riser from be becoming q clloggged8nd debris and
The stormwater retention pond will be cleaned out when the sediment in the pond
reaches one foot of depth. ,
All grass swales will be located within easements.
Grass swales will be mowed every three weeks during the growing season and will
be checked and mowed as needed on a monthly basis during the winter months.
Sedimentation in the swales and catch basins will be inspected and removed
every three months.
The sediment basin will be inspected every three months, and will be cleaned
out when the level of sediment reaches one foot of depth.
Any eroded areas will be filled with top soil, reseeded, and mulched as often
as necessary to re-establish an erosion resistant turf.
I, James M. Stallings, Jr., certify that the above project will b iltrlAd)iv
conformance with the above information.
MAY 1 5 1995
er's signature ate D E M
PROD 931 C-.0 Cp
CA 5w6 95bSO48
a Notary Public for the State of North Carolina, County
of Craven, do hereby certify that James M. Stallings, Jr. personally appeared before
me this .20 day of J8,4vdDV,,�1995, and acknowledges the due execution of.the
foregoing instrument. Wit tAA n* Fho and official seal.
i kOTA P,� = �
My commission expires
41 AN 2.5 1995
C0(I'R
1Rol

DIVISION OF ENVIRONMENTAL MANAGEMENT
Submittal Form for Projects Using Density Limits for Stormwater Control
PROJECT DATA
Project Name Sand Ridge
Location (County, Township/Municipality, Address, State Road)
Carteret County Newport Township Newport, NC
owner's Name MAR-STAh Partnership
Mailing Address 345-6 Carolina Pines Boulevard
New Bern, NC
Phone Number 919-447-4492 Submittal Date 05-09-95
Brief Description (include map and appropriate drawings) Sand Ridge
Apartment Complex
Name of Water Body Receiving Stormwater Runoff Newport River
Classification of Water Body S B
State/Federal Permits/Approvals Required (Check appropriate blanks)
CAMA Major
404 Permit
Other (Specify)
CALCULATION OF BUILT UPON AREA
Sedimentation/Erosion Control X
DEM/DHS Sewage Disposal
Built upon area means that portion of a development that is covered by impervious or partially pervious cover
including buildings, pavement, recreation facilities, gravel, etc., but not including wood decking. If the
project includes areas draining to different water classifications, please note them separately below.
p ECyE9 [
Subwatershed Subwatershbd D
Classification
Built Upon Area 9 MAY 1 5 1995
Total Project Area 1
% Built Upon Area Q E M
Allowable B/U Area 3 0 X_Y
PRO] q j/�jC)rn
+i `
Is the Project B/U Area <_ the Allowable B/U Area? NO (if no, hn eng-ineered system is required.)
% Built upon area = (built upon area / total project area) * 100
Built upon area limits for projects to meet density: SA waters -- 25%, Other -- 30%
STORMWATER CONTROL MEASURES (Grassed -tine swales should have side slopes of 3:1 0:0 or less)
Describe how the runoff will be treated Streets and parking are curb and g t� t r, water ;A
collected in slotted drains and released to the stormwater pond hPfore discharge
into Town of Newport Stormwater Collection System
BUFFER AREA
is the built upon area at least 30 feet from mean high water of all surface waters? Yes If no, please
provide a description

DEED RESTRICTIONS AND PROTECTIVE COVENANTS
By my signature below, I certify that the recorded deed
project shall limit the allowable built -upon area per
right-of-way, structures, pavement, walkways or patios
decking; state that the covenants will be binding on all
they will run with the land; and that benefits may
therefore, the covenant cannot be changed or deleted wi
CERTIFICATION
restrictions and protective covenants for this
lot to • N % A square feet inclusive of
of brick, stone, or slate, not including wood
parties and persons claiming under them; that
enforces by ;he State of North Carolina,
thout consent of the State.
I, James M. Stallings, Jr. , certify that the information included on this submittal
form is correct, that the project will be constructed in conformance with this information, and that
to the best of my knowledge, the proposed project complies with the requirements of 15 NCAC 2R.1003(b).
I authorize the below named person or firm to submit stormwater plans on my behalf, and agree to abide
by the deed restriction statement above_-'
Y YJ.
errs Signature Date
Provide authorized person or firm name and address below:
James M. Stallings. Jr., partner MAR- TAT Parfnprshin
P. 0. Box 778 -6 a olina inpc Blvd.
Havelock, NC 28532 New Bern, NC 28560
a Notary
County bf _ 11%2j /0-c-le do hereb certify that
appeared before me this �_ day �of
foregoing instrument. Witness T�fiq4d"dnd o f al ial se,
V '0 ',
w i c
My commission expires 7
jai.
�9 �
cc:
Public for the State of North Carolina ,
JamPR M SLP11 inQc _Ir personally
19__2.,-,—and acknowledge the due execution of the
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN —OFF
Regional Office
Date Individual Evaluating Forms/plans
Date Regional water Quality Supervisor
Applicant/Bradley Bennett/Consultant Rev. 12/93

ROBERT H. DAVIS, RLS
SURVEYORS AND PLANNERS
7175 HIGHWAY 70 EAST
NEW BERN. NORTH CAROLINA 28562
919-636-2109
May 9, 1995
Ms. Linda Lewis
Environmental Engineer
N. C. Department of EHNR
Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Dear Ms. Lewis:
RE: Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
MAY 101995
D ECEIVC
D
MAY 1. 5 1"5
OEM Co
Our client, after receiving bids for the completion of the approved Stormwater
measures, found the design to be above his budget. He has urged us to explore
other methods. We have found that an existing ditch along the northwestern
property line can accept much of the stormwater flow. However, the existing
ditch does not have enough depth to allow the use of collection pipes. We
have developed a plan that will utilize surface swales and no piping to
accomplish the drainage. Getting the water into and out of a stormwater
control pond would not work due to the shallowness of the existing drainage.
It was decided to make the majority of the project exempt by restricting the
built upon area of each lot. The same restrictions, operations, and
maintenance as called for in the original stormwater project will be utilized.
All flow from this area will be collected in surface swales and will pass
through a filter basin along the northwestern property line.
The multi -family area to the extreme west will be the balance of.the project.
It would have created too much density to have been included in the exempted
area and will- have a stormwater treatment pond. Water will be collected in
slotted drains in the center of the parking areas and carried to an adjacent
pond.
I would like to thank you for your continued cooperation on this project. We
have enclosed data for your review on these approaches. If there is another
preferred manner of submitting these changes, please call.
Sincerely,
Robert H. Davis
Registered Land Surveyor L-2432

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
June 12, 1995
Mr. Gary Barker, P.E.
Barker Engineering Service
Post Office Drawer D
New Bern, North Carolina 28563
Subject: ADDITIONAL iNFoRmATION
Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
Dear Mr. Barker:
The Wilmington Regional Office received previously requested information for the revised Sand
Ridge Subdivision on June 6, 1995. A preliminary review of that information has determined that the
submittal for the subject project is not complete. The following information is needed to continue the
stormwater review:
1. You have assumed a flow depth of 2' in order to calculate the velocity. Delineate the
drainage area contributing to each swale, and use the "normal depth procedure" outlined
by Dr. Rooney Malcolm, or some other appropriate method, to calculate the depth of flow
in a channel which has side slopes, flow rate, Mannings n, and longitudinal slope known.
By assuming depths through trial and error, a balance is achieved between the known value
and the unknown value. When the two sides of the equation balance, a realistic depth of
flow and therefore, a realistic velocity in response to the 10 year storm can be calculated.
You have also used Branches "A" and "B" to calculate the velocity. Neither of these swales
can be used as a 100' vegetated swale, so calculating their velocities is pointless. Please
choose those two or three 100' swales located immediately off the pavement at the end of
a concrete flume with the largest flowrates to illustrate that the 10 year velocity is non -
erosive.
2. The type of swale lining material (grass cover) must be specified on the swale detail.
Simply referring to the Erosion Control Manual specifications is inadequate for stormwater
approval. Each grass cover has a different allowable velocity, with a legueme mixture
having the lowest (4.5 fps.)
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Barker
June 12, 1995
Stormwater Project No. 931006
3. Please demonstrate how you calculated the 1,950 square feet per lot impervious coverage.
Please show each step, including a breakdown of the road impervious area, and all
multiplication, division and subtraction operations. Please delineate a property boundary
of 17.71 acres for the low density portion of the project.
4. Please refer to the enclosed example of a flow spreader mechanism and incorporate it's
design function into the concrete flume detail shown on the plans. There are many ways
to achieve a dispersed flow across the swale, so please don't limit yourself to this one
detail.
5. Sheet flow across the road is acceptable to DEM for stormwater approval, however, DOT
will not accept a road to be maintained with this design. Please bear this in mind, and
make any revisions necessary. Please add a detail of the method used to channel that
runoff, ie., the new road section and the length of road affected by the new section.
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to July 12, 1995, or the submittal will be
returned as incomplete.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\931006.JUN
cc: Linda Lewis
Central Files

6 5Uh y
S.tate of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVMSION OF ENVIRONMENTAL MIANAGEmENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
May 18, 1995
Mr. Robert H. Davis, R.L.S.
Surveyors and Planners
7175 Highway 70 East
New Bern, North Carolina 28562
Subject: ADDITIONAL INFORMATION
Stormwater Project No. 931006 Revision
Sand Ridge Subdivision
Carteret County
Dear Mr. Davis:
The Wilmington Regional Office received a revised Stormwater Submittal for the Sand Ridge
Subdivision on May 15, 1995. A preliminary review of that information has determined that the
submittal for the subject project is not complete. The following information is needed to continue the
stormwater review:
1. This project will be split into two, one for the low density subdivision, which will retain
the 931006 project number, and a new one for the Multi -family detention pond, number
SW8 950508. Comments for the pond will be addressed under separate cover.
2. A revised, signed, and notarized submittal form for the low density subdivision. The
original certification was for 83 lots; 86 lots are now proposed. Please specify the built -
upon area per lot on the back of the submittal form, as done for the previous approval.
������y 3. Please show the swale locations, high points, flow arrows, and delineate the drainage areas
e for Phase I.
k 4. Please provide swale velocity calculations, and number the swales on the plans to
correspond to the calculations.
k
Q/ 5. Please provide revised built -upon area calculations.
�A% . 6. Please sec the of grass to be used in the swales. This will be the limitingfactor
specify type
in determining if the swale velocity is non -erosive for the 10 year storm.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Davis
May 18, 1995
Stormwater Project No. 931006 Revision
----------------------------------------------
\3 Q, . 7. Please note on the plans that all swales must be constructed and vegetated prior to the
construction of impervious surfaces.
�159 �
oy . k Q(0 8. Please provide a curbcut/velocity reduction/flow spreader mechanism detail on the plans.
9. How will the runoff from the west side of the road in front of lots 25-30 get to a swale?
10. A valley gutter must be located at the intersection of the street from the multi-familyarea
and Foxhall Road in order to get the runoff to cross the intersection.
11. Two of the swales are less than 100' long. All swales must provide at least 100' of grassed
area with no .other flow entering the swale in that 100 feet.
/ 12. Please label the cul-de-sac radii on the plans.
13. Is the filter basin on lot 37 4 permanent structure, or will lot 37 eventually be built on?
14. Please provide two copies of the revised plans for each separate project, ie., 2 for the low
density subdivision, and two for the pond.
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to June 18, 1995, or the submittal will be
returned as incomplete.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\931006.MAY
cc: Linda Lewis
Central Files
1)

DIVISION OF ENVIRONMENTAL MANAGEMENT
DENSITY
PROJECT DATA
Project Name
Location (County, Township/Municipality, Address, State Road)
Owner's Name
MailingAddress
Phone Number Submittal Date
Brief Description (include map and appropriate drawings)
Name of Water Body Receiving Stormwater Runoff
ENGINEERED
Classification of Water Body If SA waters, engineered system, and distance is <0.5
miles, attach report of chloride sampling results mg/l
State/Federal Permits/Approvals Required (Check appropriate blanks)
CAM.A Major Sedimentation/Erosion Control
404 Permit DEM/DHS Sewage Disposal
Other (Specify)
CALCULATION OF BUILT UPON AREA
Built upon area means that portion of a development that is covered by impervious or partially pervious cover
including buildings, pavement, recreation facilities, gravel, etc., but not including wood decking. If the project
includes areas draining to different water classifications, please note them separately below.
Subwatershed Subwatershed
Classification
Built upon area
Total Project Area
% Built upon Area
Allowable B/U Area
Is the Project B/U Area :!� the Allowable B/U Area? (If no, an engineered system is required.)
% Built upon area = (built upon area / total project area) * 100
Built upon area limits for projects to meet density: SA waters --- 25%, Other ---30%
STORMWATER COLLECTION SYSTEM
Describe how the runoff will be treated
Office use only

BUFFER AREA
Is the built upon area at least 30 feet from mean high water of all surface waters? If no, please
provide a description
kNote: uniy boat ramps, public roads, public bridges, and walkways to water related facilities are allowed
within 30 feet of the mean high water line if the project is intended to meet stormwater control
requirements through density limits.)
DEED RESTRICTIONS AND PROTECTIVE COVENANTS
By my signature below, I certify that the recorded deed restrictions and protective covenants for this project
shall limit the allowable built -upon area per lot to square feet inclusive of right-of-way,
structures, pavement, walkways or patios of brick, stone, or slate, not including wood decking, state that
the covenants will be binding on all parties and persons claiming under them, that they will run with the
land, and that benefits• may be enforced by the State of North Carolina, therefore, the covenant cannot be
changed or deleted without consent of the State.
CERTIFICATION
1, , certify that the information included on this
submittal form is correct, that the project will be constructed- in conformance with this information, and
that to the best of my knowledge, the proposed project complies with the requirements of 15 NCAC
2H.1003 (b). I authorize the below named person or firm to submit stormwater plans on my behalf, and
agree to abide by the deed restriction statement above.
Owner's Signature
Provide authorized person or firm name -and address below:
Date
I, , allotary Public for the State of
County of , do hereby certify that personally
appeared before me this day of , 19 , and acknowledges the due execution
of the foregoing instrument. Witness my hand and official seal,
My commission expires
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN -OFF
Regional Office
Date Individual Evaluating Forms/Plans
Date Regional Water Quality Supervisor
cc: Applicant/WiRO/Bradley Bennett/Central Files

ROBERT H. DAVIS, RLS
KJSURVEYORS AND PLANNERS
7175 HIGHWAY 70 EAST
NEW BERN. NORTH CAROLINA 28562
919-636.2109
August 24, 1995
Ms. Linda Lewis
Environmental Engineer
N. C. Department of EHNR
Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Dear Ms. Lewis:
RE: Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
STORUM50itt
p ECE9dE
D
AUG 2 R 1"5
DEIN
PROT ; 44 /00&
IPeV756/1
Enclosed you will find yet another revision to this project. The first
approval we received was for 20 lots which were developed on an exempt system.
After that was approved we submitted a plan for the balance of the property
utilizing one pond to treat the stormwater. After we complied with your
request for additional information your office approved that plan. The
developer requested ( because of budget reasons ) that we resubmit breaking
the project into two phases. One phase for the apartments SW8 950508 and the
other phase as an exempt system. The Town of Newport disapproved that plan
because it utilized an outlet that was outside of the city limits and for
which they did not have an easement.
The plan contained herein is very close to the one submitted at the beginning
of the year. The pond has been relocated and now serves all of the same areas
that the previous one pond design shows. You had previously approved our
calculations and pond sizing. The pond's shape has been altered slightly
because it does not have to conform to other lot lines. It is now rectangular
and all water will enter at the upstream end thereby eliminating the need for
a diverter drain. We have enclosed plans and calculations ( with minor
corrections ) that are as the plans you had previously approved.
I would like to thank you for your continued cooperation and patience on this
project. If there is anything that we can do to help you on this project
please feel free to call.
Sincerely,
Robert H. Davis
Registered Land Surveyor L-2432

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
February 24, 1995
Mr. Gary Barker, P.E.
Engineers and Planners
233 Middle Street
New Bern, North Carolina 28561
Subject: ADDITIONAL, INFORMATION
Stormwater Project No. 931006 Revision
Sand Ridge Subdivision
Carteret County
Dear Mr. Barker:
The Wilmington Regional Office received a Stormwater Submittal for the Sand Ridge Subdivision
on February 17, 1994. A preliminary review of that information has determined that the submittal for
the subject project is not complete. The following information is needed to continue the stormwater
review:
1. Three sets of plans are required for all submittals and revisions. Please forward 2 more
sets.
2. The elevation of the rear slope of the diversion ditch is lower than the permanent pool, thus
the incoming water is technically not diverted, only slowed down. Please raise this
elevation above the storage elevation of 27 and lower it down incrementally as the ditch
meanders farther away from the outlet structure. What you are showing is a forebay, not
a diversion.
3. The previously requested revised Operation and Maintenance Plan for the stormwater
controls has not been received.
4. The built -upon area of 6.43 acres reported on the submittal form does not match the built -
upon area of 7.71 acres reported in the calculations. Please revise the submittal form.
5. The pond calculations of surface area, volume and orifice sizing are. in order.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Barker
February 24, 1995-
Stormwater Project No. 931006 Revision
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to March 24, 1995, or the submittal will
be returned as incomplete.
f
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:1WQSISTORMWATIADDINFO1931006.FEB
cc: (2) Linda Lewis
Central Files
2

DI VISJON Ole 6FN tlR01- !_71::NTAll. hIANAGEINIE T
D17NIs1'1.';'
ENGINEERED
PROJECT DATA
Project NameSand Ridge_
Location (County, Township/h9uniciDid ity. Addre ,,.s, State Road) Carteret noun t y
_ Newport Township^_New ort NC_.
Owner's Name MAR-STAL Partnership
hlailingAddress`345-6 Caroling_ Pine.,.Boul yard
----_ - New Bern, NC
PhutaeNuanber!_91,9-447-4492 Submittal Date 10-20-94
E-rief :Description (include rnap and appropriate dt swings) 22 . acre+ single family
and apartment residgnt.j_al__._-a zaJo_pmeD.l.___.�--_
Plcune of Water Body Receiving Stor►i)water-Rtiti<iff .....-. NQWpQr t Rj ver_ _
('lassification of Water Body.
_SB _ If SA waters, engineered system, and distance is <0.5
miles, attach report of chloride sampling restilts_ _mg/l
State/Federal Permiv,,/Approvals Requited (Check still)ropriau. blanks)
C'AMA Majorr.—_.._.._. ..._
404 Permit __ -
Other (Specify)__-
CALCU1,ATION OV BUILT UPON AREKsA
Sedirnentation/Erosion Control X
DEMI'D 15 Sawage Disposal_ _
Built uI► in area means that portion of a development that is covered by impervious or partially pervious cover
including; buildings, pavement, recreation facilities, gravel, etc., but not including wood decking. If the project
includes areas draining to different water classifications, E)Iease note diem separately below.
Classification
Built upon area
Total Project Area
'� Built upon Area
Allowable BlCI Area
�ubgatrrs.�ie{1
6 43 a
---- -- 22.0 - ac
29.2
t �w�t�sUed
Is the Project B/U Area s the Allowable Ii/U Area'! Ye s__ (if no, an engineer
`-i, buill. upon area = (built upon aTfa / total 1) oject ace.�l )l};1
iNuili. (jpm area limits for projects to meet demity: SA --- 25'X, Other ---30%
4'a'e:►It'19iWATER (.'(.)L1.r'C': K.)N s1w1'Eht
Dt!;.:rihe- how the ninoff will be. Heated • Streets are „curb„ &_.guter
is collected into -catch basins. and piped -or dra.aeA-Jby .gram-
s_wales to the Filter Basin or_S_to_rmwater _Retention Pond before
rl;scharge_ l�t� To�vm_.Ql errz�4x.t Stormw&Ler a,1lec.LiQn.._Syst;er>­.-.--
ed system is required.)
Office use only
RE
lf 1v
UD
FEB 1.7 1"5
t'ROJ q �100(�

BLTF'I?]?,R AREA
]s the built upon area at least 30 feet from ineao high water of all surface waters? Yes If no, please
provide a description
(Note: Only boat ramps, public roads, public bride cis, and walkways to water related facilities are allowed
within 30 feet of the mean high water litre if the project is intwided to ineet stormwateir control
requirements through density limits.)
X)I±:M RESTRICTIONS AND PROTECTIVE COVIRN,1NTS
By rrmy signature below, I certify that the recorded di:eJ restrictimis and protective covenants for this projkx:t
shall limit the allowable built -upon area per lot tk) _ -', square feet inclusive of right-of-way,
structures, pavement, walkways or patios of brick, stone, or slate, not including wood decking, state that
tl,e covenants will be binding on all parties and p�rsutis claiming under theta, that they will run with the
land, and that benefits may W. enforctcl by the State of. North Carolina, therefore, the covenant cannot be
changed or deleted without consent of the State.
*Lots in Drainage Areas 1 = 1,950 Lots 1 thru 20
(:EIt'.f`IViCATION '--Lots in Drainage Areas 2 & 3 = 2,300 Lots 21 thru 83
1, James M. Stallings, Jr. certify that the information included on this
submittal form is correct, that the project will be constructed in conformance with this information, and
that to the best of my knowledge, the proposed project complies with the requirements of 15 NCA.0
2H.1003 (b). I authorize the below named person or firm to submit stormwater plans on my behalf, and
agree to abide by the deed restrt inn sea ement kt
Provide authorized person or firm name and
James M. Stallings, Jr., partner
P. 0. Box 778
Havelock, NC 28532
2elf
/D -Date
:
MAR—STAL Partnership
345-6 Carolina Pines Boulevard
New Bern, NC 28560
I,-__-111q.. f3 . l%f-1�F� , allotary Puhlj
County of /� , do hereby certiir�r`tif�at•;.Iames M. tallings, Jr. personally
appeared befor�e me this of Octobe-r� <v�': p;��. atfJ acknowledges . the due executtotj
of the loretrdine instrument. wimess my hand and off i ; t:4 I `J-1
v
,,RAVEN1041481.66
��.•�''.
My commission expires
UM
DMSIOs1OFIE:NVERONMEMIAll, MANAGEMENT SIGN -OFF
Regional Office
Date
Date,
Individual Evaluatiiig Forms/flans
Re,ik)nal Water ihi:ality Smllx:rvisor
c:c: App)icant/R'iRO/Bradley Files

ROBERT H. DAVIS, RLS
SURVEYORS AND PLANNERS
7175 HIGHWAY 70 EAST
NEW BERN, NORTH CAROLINA 28562
919-636-2109
January 19, 1995
Ms. Linda Lewis
Environmental Engineer
N. C. Department of EHNR
Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Dear Ms. Lewis:
RE: Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
�i�C�FF�3C�7f��
JAN 2 0 1995 !J
E C E I V L 0
JAN 2 0 1995
DEM
rRol # 9310C)(a
Enclosed you will find additional information requested. The pond
will not treat the lots in Phase I. Due to the location of some
drainage, some parts of the first phase will contribute to the pond.
The area west of the CP&L R/W is being utilized as apartments and
open space required by the town. The open space is not being
drained into any of our systems and if developed will require its
own.
This drainage plan is revised and submitted to provide a
comprehensive plan to be utilized for the future areas.
The Operation and Maintenance Plan and submittal form will arrive
under separate cover.
Sincerely,
Robert H. Davis
Registered Land Surveyor L-2432

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
November 2, 1994
Mr. Gary C. Barker, P.E.
Barker Engineering Services
Post Office Drawer D
New Bern, North Carolina 28563
Subject: ADDITIONAL INFORMATION
Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
Dear Mr. Barker:
The Wilmington Regional Office received a revised Stormwater Submittal for the Sand Ridge
Subdivision on September 27, 1994, with additional information received on October 24, 1994. A
preliminary review of that information has determined that the submittal for the subject project is not
complete. The following information is needed to continue the stormwater review:
1. The pond calculations are out of order. You must calculate the drainage area to the pond,
the impervious area, the minimum pond surface area required based on depth, percent
impervious, and TSS removal efficiency, volume, and drawdown orifice. All of these
items are deficient in your calculations.
2. It appears from the calculations that you are accounting for storage volume in the ditches
that pick up the runoff and direct it to the pond. While the State encourages the use of
grassed swales prior to entering a pond, no credit is given for the storage or infiltration
that occurs in those ditches.
3. The velocity requirements only apply to the swales located in that part of the subdivision
where density is met, but curb and gutter is used. The ditches that direct runoff to the
pond are not required to meet the non -erosive velocity criteria for 100' swales.
4. It appears that a part of Drainage Area 2 is now directed into the pond via a concrete
flume. This is OK, but the point of entry must be relocated. The currently proposed entry
point is too close to the outlet structure and will cause short-circuiting.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 0 Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Barker
November 2, 1994
Stormwater Project No. 931006
----------------------------------------------
�� 5. It appears that Drainage Area 3 will have two 100' swales proposed. You must label these
swales, or number them, both on the plans and in the calculations so that their velocities
can be reviewed. Additionally, you must calculate the density in DA. 3 to prove that the
proposed 1950 square feet of built -upon area proposed will meet density. You cannot
assume that because 1950 was OK for the originally permitted phase that it will be OK for
another section.
6. Please number the lots on the plans and limit the built -upon area based on lot number, not
Drainage Area number. Some of the lots are split by the drainage area boundaries,
therefore making it unclear as to the amoumt of built -upon area for those lots. Please
revise the deed restriction section of the submittal form to read that " x number of lots
(numbers _ through, are restricted to 1950, and x number of lots ( number _ through,
are restricted to 2300" .
1/ 7. Please label the outlet structure/pond section detail with the orifice size.
�p 8. Please show drainage easements for the proposed ditches and outlet piping.
9. Please revise the Operation and Maintenance plan as follows:
a. Every 6 months, the pond depth will be checked. Design depth is , and
sediment removal is required when depth is reduced to 75 % of the design depth.
0 Three feet (3') must be maintained at all times, ie., if the design depth is 3', then
it must be maintained at all times.
b. The orifice and trash rack will be inspected after every runoff producing rainfall
event, and kept clear.
C. Catch basins and piping will be inspected quarterly and cleaned of trash and
sediment accumulation as required.
d. Cattails will be removed at the end of the growing season (November). The
cuttings will be physically removed; they must not be allowed to remain in the
pond. -
e. All components of the system will be kept in good working order. Repair or
replacement of any component will meet original design specifications per the
approved stormwater plan.

Mr. Barker
November 2, 1994
Stormwater Project No. 931006
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to December 2, 1994, or the submittal will
be returned as incomplete.
If you have any questions concerning this matter please feel free to call me at [phone].
DA/arl:
cc:
Sincerely,
Ms. Linda Lewis
Environmental Engineer
S:\WQS\STORMWAT\ADDINFO\931006.NOV
(2) Linda Lewis
Central Files

DETENTION POND ANALYSIS
PROJECT #- 931006
PROJECT NAME: SAND RIDGE SUBDIVISION
Drainage Basin: NEWPORT RIVER
FILE NAME: S:\WQS\POND\931006.WK1
REVI EWER: ARL
DATE: 02—Nov-94
-2-2-5/5
Class ificationC Chlorides: N/A
Site Area 832545 square feet 23.42 (1 D 2a,/75 5-r
rainage Area 832545 square feet
r r Area in Acres 19.1126033 acres.
�clve�e s n�eV- nernt�-I�d
IMPERVIOUS AREA
Runoff Coefficient
Buildings 167290 2vI3C95 1
Concrete 0 0.95
Asphalt 117672IN-0i 0.95
TOTAL
% IMPERVIOUS
SURFACE AREA CALCULATION
SA/DA
Req. SA
Prov. SA
VOLUME CALCULATION
Green
Bottom
Perm. Pool
Design Pool
Design SA
Req. Volume
Prov. Volume
ORIFICE CALCULATION
Flowrate Q2
Flowrate Q5
Engineer uses
square feet
Pond Depth:
3.923%
<ifix'S> square feet
44i square feet
547583 square feet
0.18740113 Area
0.07496045 Area
1.5 Inches
COMMENTS
SURFACE AREA, VOLUME, AND ORIFICE ARE INADEQUATE.
Adjusted SA 167290
Adjusted SA 0
Adjusted SA 111788.4
TOTAL 279078.4
3 TSS: 90
(8 3 2545 �4 . O 3'� Z 3)
[From plan Contours]
C 5 fe Aree - T.iperv, ov 5 Area)
[From plan Contours] ZDC $$
5.604547 Diameter 2
2.241818 Diameter 5

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
February 2, 1995
Mr. Gary C. Barker, P.E.
Barker Engineering Services
Post Office Drawer D
New Bern, North Carolina 28563
Subject: ADDI'd ONAD H-0ORMATION
Stormwater Project No. 931006 Revision
Sand Ridge Subdivision
Carteret County
Dear Mr. Barker:
The Wilmington Regional Office received a Stormwater Submittal for the Sand Ridge Subdivision
on January 20, 1995. A preliminary review of that information has determined that the submittal for the
subject project is not complete. The following information is needed to continue the stormwater review:
As previously requested November 2, 1994:
�1. A cul-de-sac detail or indicate the radii on the plans.
v,'*' 2. Show drainage easements for all ditches and piping.
�t4or% h 3. Angle inlet piping that enters the pond away from the outlet structure. Short-circuiting of
h�� the pond is a major concern for this project. The entire pond length is suppposed to be
ak �. used for settling of solids. Please extend affected piping at least 50' beyond the outlet
astructure, or construct a berm between the outlet and inlet piping, to force the incoming
water to take a longer flow path.
,/ 4. Number the lots.
5. Change the Operation and Maintenance to reflect the requested wording, specifically,
inspection of the outlet structure and orifice is to be after every runoff producing rainfall
event, not every three months. Nd4 yam' r6t,_ &eC ,
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Barker
February 2, 1995
Stormwater Project No. 931006 Revision
New items to be responded to:
1. Are there supposed to be catch basins where DA 1 and DA 3 meet above the previously
permitted Phase I at the eyebrow road? Please show locations. If no catch basins are
proposed, then you must reevaluate the swale in Phase I due to the increased runoff it will
receive.
L/2. A revised submittal form spelling out the lot numbers and their respective allowed built -
upon areas.
,/ 3. You may not use the open space for the apartments as part of your site area, since you
state that this area is not included and must provide it's own stormwater control.
4. The 1 " = 80' scale is very unusual. My calculations of surface area and volume are
affected by the odd scale (ie., deficient). Please provide pond dimensions, so that more
accurate numbers may be generated. Re do C plc 5
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to March 2, 1995, or the submittal will
be returned as incomplete.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:1WQSISTORMWATIADDINF01931006.FEB
cc: (2) Nndw-hmis
Central Files

October 20, 1994
Ms. Linda Lewis
Environmental Engineer
N. C. Department of EHNR
Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3945
Dear Ms. Lewis:
.RE: Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
OCT IJ194
Enclosed you will find additional information requested. The pond
will not treat the lots in Phase I,. Due -to the location of some
drainage, some parts of the first phase will contribute to the pond.
The drainage area (DA #3)- will send its flow into the original Phase
I exempt system. Therefore, the lots will be subject to the
original 1950 sf restriction. The lots.served by the pond should be
2300 sf built upon area. That was the figure on which our
calculations were based. - .
The area west of .the CP&L R/W is being utilized as apartments and
open space required by the town. The open space is not be
drained into any of our systems and if developed will require its
own.
Your office has received the deed restriction for the Phase I lots.
No other lots have been platted or recorded. This drainage plan is
submitted to provide a comprehensive plan to be utilized for the
future areas.
The Operation and Maintenance Plan and submittal form will arrive
under separate cover.
Sincerely,
GarLC. Barker, P.E.
bIORMINIER
p ECE0Vk
D
OCT 2 4 M
DEM
PROJ 73 too�v

-
ptNM�'
State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT Bob Jamieson
Jonathan B. Howes, Secretary WATER QUALITY SECTION Regional Manager
October 10, 1994
Mr. Gary C. Barker, P.E.
233 Middle Street
New Bern, North Carolina 28561
Subject: ADDITIONAL INFORMATION
Stormwater Project No. 931006
Sand Ridge Subdivision
Carteret County
Dear Mr. Barker:
The Wilmington Regional Office received a Stormwater Submittal for the Sand Ridge Subdivision
on September 27, 1994. A preliminary review of that information has determined that the submittal for
the subject project is not complete. The following information is needed to continue the stormwater
review:
1. Plans must have a North Carolina registered Professional Engineers seal.
2. Complete, signed and notarized submittal form.
3. Signed and notarized Operation and Maintenance Plan for the stormwater controls.
4. Will the pond design include Phase T?
5. Please provide more details for the outlet structure. The orifice size and trash rack must
be located and specified.
6. Delineate, label and dimension the pond contours, specifically, the bottom, permanent pool,
and design storage contours.
7. Sealed calculations.
8. The cul-de-sac radii, either noted on the plan, or as a separate detail.
127 Cardinal Drive Extension, Wihnington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

' Mr. Barker
October 10, 1994
Stormwater Project No. 931006
----------------------------------------------
9. What is the development located west of the CP&L R/W? Has this also been accounted
for in the pond sizing?
10. Please show sufficient contour information or proposed elevations for this Office to
determine the flow direction of runoff.
11. Please provide a deed restriction for the built -upon area for the lots.
12. Three sets of revised plans.
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to November 10, 1994, or the submittal
will be returned as incomplete.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\931006.00T
cc: (2) Linda Lewis
Central Files

N/F CONNER
41
-7 C)
TvIll rw 'M f -1row 110,00 1 wir! a :�ii,iii��,:I moll �m
I MW
4c)
44
+
4
x, 1
LINCOLN DRIVE
Av
;r
cl -7
f-- ----
It
4-
4-
5z'
AN
CONNER VILLAGE
SECTION i
MS. 9 P: 2
tikk
Am
A. oo�
X
1A,
C6
o
Mw ADM AMW AMM AMW AMM AMW Amw Amr AM
*Q'I
`4
_e4 IJ ;11 14 t' "1 0
owerv,l
V d- -e, +-f ­77
p
Z
fl�l Illy
74
1jr) f
* 4:
�4
At
7'0
4 4 1
0
'aww'ww^ vmw 1p"k vwlk Nook Vail, b
ZAApr C:_)
as
57
lw "'n
0
­7
-n v" fl-
4
4f
4f
cl. Z4
At 6
000 AMW ARMW AMW
loft,
rvi
HA lftw
- --- ------
MB:
SAY WOODS
SECTION 2
J
SAY WOODS Ma: 19 P: 1
SECTION ONE
co
MB:16 P:97 4i�
447 zja
41
V,
0
4
ipc IA
ir
SOIL AND EROSION PLAN FOR
3k
�74
v)
tv

STORMWATER PROJECT NO. SW8 950508
SAND RIDGE MULTI -FAMILY
CARTERET COUNTY
EROSION AND SEDIMENi'ATION CONTROL PRACTICES
1. Temr)orary Gravel Construction Entrance/Exit
See pages 6.06.1 & 6.06.2 for details. A temporary gravel
construction entrance will be installed and maintained in
accordance with standard plans.
2. Sediment Fence
See pages 6.62.1 through 6.62.4. Sediment fence to be
installed if necessary to prevent offsite sedimentation and
maintained in accordance with standard plans.
3. Riprap Channel
See page 6.31.3. Riprap, emergency spillway outlet to prevent
eroding or scouring of banks.
4. Pipe Outlet to Well-defined channel
See pages 6.41.4 & 6.41.5. Riprap discharge of Stormwater
Control Pond to dissipate energy prior to flow into existing
ditch.
5. Temporary Seeding
See pages 6.10.1 through 6.10.4. Temporary seeding shall be
done on all disturbed areas within 30 days after final grade is
established unless permanent seeding can be accomplished.
6. Permanent Seeding
See pages 6.11.1 through 6.11.10, 6.11.24, 6.11.25, & 6.11.31.
Permanent seeding shall be done on all disturbed areas after
final grade is established and during proper seeding dates.
STORMWATEU
JUN 0 6 1995
OEM
raoJ r�_�_

Practice Standards and Specifications
6.06 RIAMIM • • •
Definition A graveled area or pad !=aced at points ;where vehicles enirr and leave a con-
LL- struction site.
Purpose To provide a buffer area where vehicles can drop their mud and sediment to
avoid transporting it onto public roads, to control erosion from surface runoff,
afid to help control dust.
Conditions Where Wherever traffic will be leaving aconstruction site and moving directly onto a
Practice Applies Public road or other paved off -site area. Construction plans should limit traffic
to properly constructed entrances.
Design Criteria Aggregate Size —Use 2-3 inch washed stone.
Dimensions of gravel pad —
Thickness: 6 inches minimum
Width: 12-ft minimum or full width at all points of the vehicular
entrance and exit area, whichever is greater
Length: 50-ft minimum
Location —Locate construction entrances and exists to limit sediment from
leaving the site and to provide for maximum utility by all construction vehicles
(Figure 6.06a). Avoid steep grades and entrances at curves in public roads.
coarse aggregate
Figure 6.06a Gravel entrancetexit keeps sediment from leaving the construction site (modified from Va SWCC).
6.06.1

0
Washing —If conditions at the site are such that most of the mud and sediment
are not removed by vehicles traveling over the gravel, the tires should be
washed. Washing should be done on an area stabilized with crushed stone that
drains into a sediment trap or other suitable disposal area. A wash rack may also
be used to make washing more convenient and effective.
Construction 1. Clear the entrance and exit area of all vegetation, roots, and other objec-
Specifications tionable material and properly grade it.
2. Place the gravel to the specific grade and dimensions shown on the plans, and
smooth it.
3. Provide drainage to carry water to a sediment trap or other suitable outlet.
4. Use geotextile fabrics because they improve stability of the foundation in
locations subject to seepage or high water table.
Maintenance Maintain the gravel pad in a condition to prevent mud or sediment from leav
ing the construction site. This may require periodic topdressing with 2-inch
stone. After each rainfall, inspect any structure used to trap sediment and clean
it out as necessary. Immediately remove all objectionable materials spilled,
washed, or tracked onto public roadways.
References Runoff Conveyance Measures
6.30, Grass -lined Channels
Sediment Traps and Barriers
6.60, Temporary Sediment Trap
6.06.2

Practice Standards and Specifications
6.10qiiiiiqii' • '
TS
Definition Planting rapid -growing annual grasses, small grains, or legumes to provide in-
itial, temporary cover for erosion control on disturbed areas.
Purpose To temporarily stabilize denuded areas that will not be brought to final grade
for a period of more than 30 working days.
Temporary seeding controls runoff and erosion until permanent vegetation or
other erosion control measures can be established. In addition, it provides
residue for soil protection and seedbed preparation and reduces problems of mud
and dust production from bare soil surfaces during construction.
Conditions Where On any cleared, unvegetated, or sparsely vegetated soil surface where vegeta-
Praetiee Applies live cover is needed for less than 1 year. Applications of this practice include
diversions, dams, temporary sediment basins, temporary road banks, and top-
soil stockpiles.
Planning Annual plants, which sprout and grow rapidly and survive for only one season,
Considerations are suitable for establishing initial or temporary vegetative cover. Temporary
seeding preserves the integrity of earthen sediment control structures such as
dikes, diversions, and the banks of dams and sediment basins. It can also reduce
the amount of maintenance associated with these devices. For example, the fre-
quency of sediment basin cleanouts will be reduced if watershed areas, outside
the active construction zone, are stabilized.
Proper seedbed preparation, selection of appropriate species, and use of quality
seed are as important in this practice as in Practice 6.11, Permanent Seeding.
Failure to follow established guidelines and recommendations carefully may
result in an inadequate or short-lived stand of vegetation that will not control
erosion.
Temporary seeding provides protection for no more than 1 year, during which
time permanent stabilization should be initiated.
Specifications Complete grading before preparing seedbeds and install all necessary erosion
control practices, such as dikes, waterways and basins. Minimize steep slopes
because they make seedbed preparation difficult and increase the erosion
hazard. If soils become compacted during grading, loosen them to a depth of 6-
8 inches using a ripper, harrow, or chisel plow.
SEEDBED PREPARATION
Good seedbed preparation is essential to successful plant establishment. A good
seedbed is well -pulverized, loose, and uniform. Where hydroseeding methods
are used, the surface may be left with a more irregular surface of large clods and
stones.
Liming —Apply lime according to soil test recommendations. If thepH (acidity)
of the soil is not known, an application of ground agricultural limestone at the
6.10.1

rate of 1 to 1 1/2 tons/acre on coarse -textured soils and 2-3 tons/acre on fine -
textured soils is usually sufficient. Apply limestone uniformly and incorporate
into the top 4-6 inches of soil. Soils with a pH of 6 or higher need not be limed.
Fertilizer —Base application rates on soil tests. When these are not possible,
apply a 10-10-10 grade fertilizer at 700-1,000 Iblacre. Both fertilizer and lime
should be incorporated into the top 4-6 inches of .soil. If a hydraulic seeder is
used, do not mix seed and fertilizer more than 30 minutes before application.
Surface roughening —If recent tillage operations have resulted in a loose sur-
face, additional roughening may not be required except to break up large clods.
If rainfall causes the surface to become sealed or crusted, loosen it just prior to
seeding by disking, raking, harrowing, or other suitable methods. Groove or fur-
row slopes steeper than 3:1 on the contour before seeding (Practice 6.03, Sur-
face Roughening).
PLANT SELECTION
Select an appropriate species or species mixture from Table 6.10a, for seeding
in late winter and early spring, Table 6.10b for summer, and Table 6.10c for fall.
In the Mountains, December and January seedings have poor chances of suc-
cess. When it is necessary to plant at these times, use recommendations for fall
and a securely tacked mulch.
SEEDING
Evenly apply seed using a cyclone seeder (broadcast), drill, cultipacker seeder,
or hydroseeder. Use seeding rates given in Tables 6.10a-6.10c. Broadcast seed-
ing and hydroseeding are appropriate for steep slopes where equipment cannot
be driven. Hand broadcasting is not recommended because of the difficulty in
achieving a uniform distribution.
Small grains should be planted no more than 1 inch deep, and grasses and
legumes no more than 1/2 inch. Broadcast seed must be covered by raking or
chain dragging, and then lightly firmed with a roller or cultipacker. Hydroseeded
mixtures should include a wood fiber, (cellulose) mulch.
MULCHING
The use of an appropriate mulch will help ensure establishment under normal
conditions and is essential to seeding success under harsh site conditions (Prac-
tice 6.14, Mulching). Harsh site conditions include:
• seeding in fall for winter cover (wood fiber mulches are not considered
adequate for this use),
• slopes steeper than 3:1,
• excessively hot or dry weather,
• adverse soils (shallow, rocky, or high in clay or sand), and
• areas receiving concentrated flow.
If the area to be mulched is subject to concentrated waterflow, as in channels,
anchor mulch with netting (Practice 6.14, Mulching).
6.10.2

Practice Standards and Specifications
Maintenance Reseed and mulch areas where seedling emergence is poor, or where erosion
occurs, as soon as possible. Do not mow. Protect from traffic as much as pos-
sible.
References Site Preparation
6.03, Surface Roughening
6.04, Topsoiling
Table 6.10a
Temporary Seeding
Recommendations for Late
Winter and Early Spring
Surface Stabilization
6.11, Permanent Seeding
6.14, Mulching
Appendix
8.02, Vegetation Tables
Seeding mixture
Species Rate (Ib/acre)
Rye (grain) 120
Annual lespedeza (Kobe in
Piedmont and Coastal Plain,
Korean in Mountains) 50
Omit annual lespedeza when duration of temporary cover Is not to extend
beyond June.
Seeding dates .
Mountains —Above 2500 ft: Feb. 15 - May IS
Below 2500 ft: Feb. 1 - May 1
Piedmont —Jan. 1 - May 1
Coastal Plain —Dec. 1 - Apr. 15
Soil amendments
Follow recommendations of soil tests or apply 2,000 lb/acre ground agricul-
tural limestone and 750 lb/acre 1040-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Refertilize if growth is not fully adequate. Reseed, refertilize and mulch im-
mediately following erosion or other damage.
6.10.3

Table 6.10b
Temporary Seeding
Recommendations for
Summer
Table 6.10c
Temporary Seeding
Recommendations for Fall
Practice Standards and Specifications
Seeding mixture
Species Rate (Ib/acre)
German millet 40
In the Piedmont and Mountains, a small -stemmed Sudangrass may be
substituted at a rate of 50 lb/acre.
Seeding dates
Mountains —May 15 - Aug. 15
Piedmont —May 1 - Aug.. 15
Coastal Plain —Apr. 15 - Aug. 15
Soil amendments
Follow recommendations of soiltests orapply2,000lb/acre ground agricul-
tural limestone and 750 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Refertilize if growth is not fully adequate. Reseed, refertilize and mulch im-
mediately following erosion or other damage.
Seeding mixture
Species Rate (Iblacre)
Rye (grain) 120
Seeding dates
Mountains —Aug. 15 - Dec. 15
Coastal Plain and Piedmont —Aug. 15 - Dec. 30
Soil amendments
Follow soil tests or apply 2,000 lb/acre ground agricultural limestone and
1,000lb/acre 10-10-10fertilizer.
Mulch
Apply 4.000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Repair and refertilize damaged areas immediately. Topdress with 50
Ib/acre of nitrogen in March. If it is necessary to extend temporary cover
beyond June 15. overseed with 50 lb/acre Kobe (Piedmont and Coastal
Plain) or Korean (Mountains) lespedeza in late February or early March.
6.10.4

Practice Standards and Specifications
6.11
1'5
Definition Controlling runoff and erosion on disturbed areas by establishing perennial
vegetative cover with seed.
Purpose 'To reduce erosion and decrease sediment yield from disturbed areas, and to per-
manently stabilize such areas in a manner that is economical, adapts to site con-
ditions, and allows selection of the most appropriate plant materials.
Conditions Where Fine -graded areas on which permanent, long-lived vegetative cover is the most
Practice Applies practical or most effective method of stabilizing the soil. Permanent seeding
may also be used on rough -graded areas that will not be brought to final grade
for a year or more.
Areas to be stabilized with permanent vegetation must be seeded or planted
within 30 working days or 120 calendar days after final grade is reached, unless
temporary stabilization is applied.
Planning Vegetation controls erosion by protecting bare soil surfaces from raindrop im-
Considerations pact and by reducing the velocity and volume of overland flow.
The most common and economical means of stabilizing disturbed soils is by
seeding grasses and legumes. The advantages of seeding over other means of
establishing plants include the smaller initial cost, lower labor input, and greater
flexibility of method. The disadvantages of seeding include:
• potential for erosion during the establishment stage,
the need to reseed areas that fail to establish,
seasonal limitations on suitable seeding dates, and
• a need for water and appropriate temperatures during germination and
early growth.
The probability of successful plant establishment can be maximized through
good planning, knowledge of the soil characteristics (Table 6.1 la), selection of
suitable plant materials for the site, good seedbed preparation, adequate liming
and fertilization, and timely planting and maintenance.
SELECTING PLANT MATERIALS
Climate, soils, and topography are the major factors affecting the suitability of
plants for a particular site. All three of these factors vary widely across North
Carolina, with the most significant contrasts occurring among the three major
physiographic regions of the state —Mountains, Piedmont, and Coastal Plain
(Figure 6.1 la).
To simplify plant selection, a Key to Permanent Seeding Mixtures is presented
in Table 6.1 lb. To find seeding specifications for a specific site, follow this key
through the different steps —region, slope, soil, and maintenance level —to the
appropriate seeding number. Seeding mixtures recommended here are designed
for general use and are well proven in practical field situations (Tables 6.11c
6.11.1

Table 6.11 a
Suitability of Soil for Establishment of Low -maintenance Vegetation
Criteria
Suitability
Limiting Factors
Good Fair
Poor
pH
5.6-7.8 4.5-5.5
<4.5
Too acid; possible
Al. Mn, Fe toxicity
Available
>.10 .05-.10
<.05
Too dry
water capacity
Texture2
I,sil,si scl, sicl
sc, sic
Too high in clay
sl cl
c
Is
s
Too high in sand
Coarse (3-10 In)
<15% 15-35
>35
Lg. stones restrict
fragments $ (>10 in)
4% 3-10
>10
tillage; droughty
Depth to
40 20-40
<20
Insufficient
bedrock (in.)
rooting depth
Salinity (mrthos/cm)
8-16
>16
Excess salt
1 in./in.
2Sandy clay loam (scl), silty clay loam (sicl), clay loam (cl), sandy loam (sl), silt loam (sii), loamy sand (Is), sandy
clay (sc), silty clay (sic), clay (c), sift (sl), sand (s), and loam (1).
31"ercent by weight.
Source: National Soils Handbook, USDA-SOS,1983.
I Coastal Plain
Mountains Piedmont
Upper Middle Lower
A�4 Sony flA.t winor [aooll a„r �Nero wrn, Fin
.NNWIYu Yonlrl
YSIir
am b" Fulfil i.A., pnq, ( Will
AW6r Imo C."MY � fwlr YoJ S
y
NhY ~". wolo 6oM4Y (MiM� "a"as'" ryrrop Y,,,.
Info (
bolo Yq.00A lot"� A4A,o,Y oMolo `� 6,
fillYyh
GoM Know
1 l tliwlrl Sdr Slrly� Wallbyu S Gam'
IWb 11101"
Slog YoW Arr W Yolr ` SWw Iw. oAW
00-
Ilolr
Tidewater
Sand Hills �"�"
I c
w..a
n
Figure 0.11 a Major physiographic regions of North Carolina differing in climate, soils and topography.
'I
6.11.2

Practice Standards and Specifications
through 6.1 lv). They are designed to produce maximum stabilization and min-
imize the amount of maintenance and repair required.
Land use is a primary consideration in planning permanent seedings. For this
purpose land use, whether residential, industrial, commercial, or recreational,
can be divided into two general categories:
High -maintenance areas are mowed frequently, limed and fertilized
regularly, and either (1) receive intense use (e.g., athletic fields) or (2) re-
quire maintenance to an aesthetic standard (e.g., home lawns). Grasses
used for these situations are long-lived perennials that form a tight sod
and are fine -leaved and attractive in appearance. They must be well -
adapted to the geographic area where they are planted and able to endure
the stress of frequent mowing. Sites where high -maintenance vegetative
cover is desirable include homes, industrial parks, schools, churches, and
recreational areas.
Low -maintenance areas are mowed infrequently or not at all, and do not
receive lime and fertilizer on a regular basis. Plants must persist with lit-
tle maintenance over long periods of time. Grass and legume mixtures are
favored for these sites because legumes are a source of soil nitrogen.
Mixed stands are also more resistant to adverse conditions. Sites suitable
for low -maintenance vegetation include steep slopes, stream or channel
banks, some commercial properties, and "utility" turf areas such as road -
banks.
SEEDBED PREPARATION
The soil on a disturbed site must be amended to provide an optimum environ-
ment for seed germination and seedling growth. The surface soil must be loose
enough for water infiltration and root penetration. The pH (acidity or alkalinity)
of the soil must be such that it is not toxic and nutrients are available —prefera-
bly between 6.0 and 6.5. Sufficient nutrients —added as fertilizer —must be
present.
It is as important to add lime as to add fertilizer. Lime is used primarily as a pH,
or acidity, modifier, but it also supplies calcium and magnesium, which are im-
portant plant nutrients. By increasing soil pH it also makes other nutrients more
available to plants. At the same time, it prevents aluminum toxicity by decreas-
ing the solubility of soil aluminum. Many soils in North Carolina are high in
aluminum, which stunts plant growth.
After seed is in place, it must be protected with a mulch to hold moisture and
modify temperature extremes, while preventing erosion during seedling estab-
lishment.
STEEP SLOPES
The operation of equipment is restricted on slopes steeper than 3:1, severely
limiting the quality of the seedbed that can be prepared. The soil cannot be suf-
ficiently worked, and amendments cannot be thoroughly incorporated.
Provisions for establishment of vegetation on steep slopes can be made during
final grading. In construction of fill slopes, for example, the last 4-6 inches might
be left uncompacted. A loose, rough seedbed is essential. Large clods and stones
6.11.3

0
provide irregularities that hold seeds and fertilizer. Cut slopes should be rough-
ened (Practice 6.03, Surface Roughening).
Where steepness prohibits the use of farm machinery, seeding methods are
limited to broadcast or hydroseeding, with hydroseeding giving the most de-
pendable results. Vegetation chosen for these slopes must not require mowing
or other intensive maintenance. Using a hydraulic seeder, seed, fertilizer, wood
fiber mulch, and a lacking agent can be applied in one operation.
Good mulching practices are critical to protect against erosion on steep slopes.
When using straw, anchor with netting or asphalt. On slopes steeper than 2:1,
jute, excelsior, or synthetic matting may be required to protect the slope.
Specifications SEEDBED REQUIREMENTS
Establishment of vegetation should not be attempted on sites that are unsuitable
due to inappropriate soil texture (Table 6.1la), poor drainage, concentrated
overland flow, or steepness of slope until measures have been taken to correct
these problems.
To maintain a good stand of vegetation, the soil must meet certain minimum re-
quirements as a growth medium. The existing soil should have these criteria:
• Enough fine-grained (silt and clay) material to maintain adequate mois-
ture and nutrient supply (available water capacity of at least .05 inches
water to 1 inch of soil).
Sufficient pore space to permit root penetration.
• Sufficient depth of soil to provide an adequate root zone. The depth to
rock or impermeable layers such as hardpans should. be 12 inches or more,
except on slopes steeper than 2:1 where the addition of soil is not feasible.
A favorable pH range for plant growth, usually 6.0-6.5.
• Freedom from large roots, branches, stones, large clods of earth, or trash
of any kind. Clods and stones may be left on slopes steeper than 3:1 if
they are to be hydroseeded.
If any of the above criteria are not met—i.e., if the existing soil is too coarse,
dense, shallow or acidic to foster vegetation —special amendments are required.
The soil conditioners described below may be beneficial or, preferably, topsoil
may be applied in accordance with Practice 6.04, Topsoiling.
SOIL CONDITIONERS
In order to improve the structure or drainage characteristics of a soil, the fol-
lowing materials may be added. These amendments should only be necessary
where soils have limitations that make them poor for plant growth or for fine
turf establishment (see Chapter 3, Vegetative Considerations).
Peat --Appropriate types are sphagnum moss peat, hypnum moss peat, reed -
sedge peat, or peat humus, all from fresh -water sources. Peat should be shredded
and conditioned in storage piles for at least 6 months after excavation.
Sand —clean and free of toxic materials.
6.11.4

Practice Standards and Specifications
Vermiculite —horticultural grade and free of toxic substances.
Rotted manure —stable or cattle manure not containing undue amounts of
straw or other bedding materials.
Thoroughly rotted sawdust —free of stones and debris. Add 6 lb of nitrogen
to each cubic yard.
Sludge —Treated sewage and industrial sludges are available in various forms;
these should be used only in accordance with local, State, and Federal regula-
tions.
SPECIES SELECTION
Use the Key to Permanent Seeding Mixtures (Table 6.1lb) to select the most
appropriate seeding mixture based on the general site and maintenance factors.
A listing of species, including scientific names and characteristics, is given in
Appendix 8.02.
SEEDBED PREPARATION
install necessary mechanical erosion and sedimentation control practices before
seeding, and complete grading according to the approved plan.
Lime and fertilizer needs should be determined by soil tests. Soil testing is per-
formed free of charge by the North Carolina Department of Agriculture soil test-
ing laboratory. Directions, sample cartons; and information sheets are available
through county Agricultural Extension offices or from NCDA. Because the
NCDA soil testing lab requires 1-6 weeks for sample turn -around, sampling
must be planned well in advance of final grading. Testing is also done by com-
mercial laboratories.
When soil tests are not available, follow rates suggested on the individual
specification sheet for the seeding mix chosen (Tables 6.11c through 6.11v).
Application rates usually fall into the following ranges:
• Ground agricultural limestone:
Light -textured, sandy soils: 1-11/2 tons/acre
Heavy -textured, clayey soils: 2-3 tons/acre
• Fertilizer:
Grasses: 800-1200lb/acre of 10-10-10 (or the equivalent)
Grass -legume mixtures: 800-1200 lb/acre of 5-10-10 (or the equivalent)
Apply lime and fertilizer evenly and incorporate into the top 4-6 inches of soil
by disking or other suitable means. Operate machinery on the contour. When
using a hydroseeder, apply lime and fertilizer to a rough, loose surface.
Roughen surfaces according to Practice 6.03, Surface Roughening.
Complete seedbed preparation by breaking up large clods and raking into a
smooth, uniform surface (slopes less than 3:1). Fill in or level depressions that
can collect water. Broadcast seed into a freshly loosened seedbed that has not
been sealed by rainfall.
6.11.5

6❑
SEEDING
Seeding dates given in the seeding mixture specifications ('fables 6.1 Ic through
6.11v) are designated as "best" or "possible". Seedings properly carried out
within the "best" dates have a high probability of success. It is also possible to
have satisfactory establishment when seeding outside these dates. However, as
you deviate from them, the probability of failure increases rapidly. Seeding on
the last date shown under "possible" may reduce changes of success by 30-50%.
Always take this into account in scheduling land -disturbing activities.
Use cerffied seed for permanent seeding whenever possible. Certified seed is
inspected by the North Carolina Crop Improvement Association. It meets
published North Carolina Standards and should bear an official "Certified Seed"
label (Figure 6.11 b).
Figure 0.11b Label displayed on all North
Carolina certified seed.
Saw in this container are horn a lot of seed which wag
pratluced Wn,III etl antllnepeclW hebCOrtlenp with trio
repulstlonoolons Ah Caforkle
nf Association on
andretheClassofSeedMownelmeaDsproducesor vendor whose name and/or condicelion number appears or.
m,a label rs solely responsible for the Information hereon end
for the proper use of iris label
GROWN IN NORTH CAROLINA
Net Wt. Lbs........
Pure seed.... (%) ..
inert Matter... (%) ..
Other Crop... (%) ..
Weed Seed... (%) •.
Germination.. (%) ..
Hard Seed....(%1 ..
Test Dale..........
Nox. Wood/lb ......
Lot No...
Carl No
Kind...
Variety
Vendor
Labeling of non -certified seed is also required by law. Labels contain important
information on seed purity, germination, and presence of weed seeds. Seed must
meet State standards for content of noxious weeds. Do not accept seed contain-
ing "prohibited" noxious weed seed.
Inoculate legume seed with the Rhizobium bacteria appropriate to the species
of legume (Chapter 3, Vegetative Considerations).
Apply seed uniformly with a cyclone seeder; drop -type spreader, drill, cu!-
tipacker seeder, or hydroseeder on a firm, friable seedbed.
6.11.6

Practice Standards and Specifications
Figure 6.11c Suggested pattern for
broadcasting seed and fertilizer
(source: NGAES Bulletin AG-69).
When using a drill or cultipacker seeder, plant small grains no more than 1 inch
deep, grasses and legumes no more than 1/2 inch. Equipment should be cali-
brated in the field for the desired seeding rate.
When using broadcast -seeding methods, subdivide the area into workable sec-
tions and determine the amount of seed needed foi• each section. Apply one-half
the seed while moving back and forth across the area, making a uniform pat-
tern; then apply the second half in the same way, but moving at right angles to
the fast pass (Figure 6.1 lc).
Seeding Pattern
Cover broadcast seed by raking or chain dragging; then firm the surface
with a roller or cultipacker to provide good seed contact.
Mulch all plantings immediately after seeding (Practice 6.14, Mulching).
HYDROSEEDING
Surface roughening is particularly important when hydroseeding, as a rough-
ened slope will provide some natural coverage for lime, fertilizer, and seed. The
surface should not be compacted or smooth. Fine seedbed preparation is not
necessary for hydroseeding operations; large clods, stones, and irregularities
provide cavities in which seeds can lodge.
Rate of wood fiber (cellulose) application should be at least 2,000 lb/acre.
Apply legume inoculants at four times the recommended rate when adding in-
oculant to a hydroseeder slurry.
If a machinery breakdown of 1/2 to 2 hours occurs, add 50% more seed to the
tank, based on the proportion of the slurry remaining. This should compensate
for damage to seed. Beyond 2 hours, a full rate of new seed may be necessary.
Lime is not normally applied with a hydraulic seeder because it is abrasive. It
can be blown onto steep slopes in dry form.
6.1.1.7

0
SPRIGGING
Hybrid Bermudagrass cannot be grown from seed and must be planted vegeta-
tively. Vegetative methods of establishing common and hybrid Bermudagrass,
centipedegrass, and Bahiagrass include sodding, plugging and sprigging (Chap-
ter 3, Vegetative Considerations). Sprigs are fragments of horizontal stems
which include at least one node (joint). They are normally sold by the bushel
and can either be broadcast or planted in furrows using a tractor -drawn tobac-
co or vegetable transplanter.
Furrows should be 4-6 inches deep and 2 ft apart. Place sprigs about 2 ft apart
in the row with one end at or above ground level (Figure 6.11 d).
Figure 6.11d Proper placement of grass
sprigs. Each sprig should have at least one Soii Surface
node (modified from NCAES Bulletin AG-69).
t
211
Correct Incorrect
Broadcast sprigs at the specified rate (Tables 6.11r and 6.11s). Press into the
top 1/2-2 inches of soil with a cultipacker or with a disk set nearly straight so
that the sprigs are not brought back to the surface.
IRRIGATION
Moisture is essential for seed germination and seedling establishment. Sup-
plemental irrigation can be very helpful in assuring adequate stands in dry
seasons or to speed development of full cover. It is a requirement for fine turf
establishment and should be used elsewhere when feasible. However, irrigation
is rarely critical for low -maintenance vegetation planted at the appropriate time
of the year.
Water application rates must be carefully controlled to prevent runoff. Inade-
quate or excessive amounts of water can be more harmful than no supplemen-
tal water.
Maintenance Generally, a stand of vegetation cannot be determined to be fully established
until soil cover has been maintained for one full year from planting. Inspect
seeded areas for failure and make necessary repairs and reseedings within the
same season, if possible.
Reseeding —If a stand has inadequate cover, re-evaluate choice of plant mate-
rials and quantities of lime and fertilizer. Re-establish the stand after seedbed
preparation or over -seed the stand. Consider seeding temporary, annual species
if the time of year is not appropriate for permanent seeding (Practice 6.10, Tem-
porary Seeding).
6.11.8

Practice Standards and Specifications
If vegetation fails to grow, soil be must tested to determine if acidity or nutrient
imbalance is responsible.
Fertilization —On the typical disturbed site, full establishment usually requires
refertilization in the second growing season. Fine turf requires annual main-
tenance fertilization (Table 6.12b). Use soil tests if possible or follow the
guidelines given for the specific seeding mixture (Tables 6.1 lc through 6.11 v).
References Site Preparation
6.03, Surface Roughening
6.04, Topsoiling
Surface Stabilization
6.10, Temporary Seeding
6.12, Sodding
6.14, Mulching
Appendix
8.02, Vegetation Tables
Chapter 3, Vegetative Considerations
USDA Soil Conservation Service
National Soils Handbook
6.11.9

0
Table 6.11 b
Key to Permanent Seeding Mixtures Based on Site Characteristics
Region and Site Characteristics' Seeding
Table
Number
(6.11)
1. Mountains
A. Steep slopes (steeper than 3:1); low maintenance
1. Average soils .............. .... . ... . ......1
M
c
2. Cold sites or rocky, rough, dry soils ..................
2M or
d
........:.. ........... ...........
7M (trees)
i
B. Gentle slopes (3:1 or less)
1. Low maintenance
a. Average soil ............... .............
3M
b. Rough, rocky, dry soil .... ...................
2M or
..................... ........ ......
7M (trees)
i
2. High maintenance
a. Full sun, soils with good moisture retention .......... , .
4M
f
b. Full sun, drought -prone soils ......... ...... .....
5M
c. Sun or semi -shade, minimum -care lawns ......... ....
6M
C. Grass -lined channels ...........................
8M
j
11. Piedmont
A. Low maintenance
1. Steep slopes or stony, shallow or dry soils .... ..........1
P
k
2. Gentle slopes with average or better soils ..............
2P
I
B. High maintenance (slopes less than 3:1)
1. Cool Sites; soils with averagge or better moisture retention ......
3P
m
2. Warm sites; dry, poor soils ......................
4P or 3CP
n, r
C. Grass -lined channels
1. Soils with average or better moisture retention . ............
5P or 8M
o, j
2. Full sun, drought -prone soils .....................
7CP
v
Ill. Coastal Plain
A. Well- to poorly -drained soils with good water -holding capacities
1. Low maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .
. 1CP
p
2. High maintenance ............. .............. 2CP
q
B. Well -drained sandy loams to excessively well -drained sands
1, High maintenance, fine turf ..... .. ... . ... . ....... 3CP
r
2. Low- to medium -care lawns .. ... .. ... . . .......... 4CP
s
3. Low maintenance ............... ............ 5CP
t
C. Intertidal zones of estuarine shorelines, dredged
material, and graded areas in salt water ...... . . . . ...... 6CP
u
D. Grass -lined channels ................ ........... 7CP
v
E. Coastal sands exposed to salt spray
and/or wind erosion ................... ... ......
see Table 6.16a
Refer to Table 6.11 a for soil suitability limitations.
6.11.10

13
Table 6.11 p
Seeding No.1 CP for: Well- to
Poorly Drained Solis with
Good Moisture Retention;
Low Maintenance
Seeding mixture
Species
Rate (Ib/acre)
Tall fescue
80
Pensacola Sahiagrass
50
Sericea lespedeza
30
Kobe lespedeza
10
Seeding notes
1. From Sept.1 - Mar. 1, use unscarified sericea seed.
2.On poorly drained sites omit sericea and increase Kobe to 30 Ib/acre.
3, Where a neat appearance is desired, omit sericea and increase Kobe
to 40 lb/acre.
Nurse plants
Between Apr. 15 and Aug. 15, add 10 lb/acre German millet or 15 lb/acre
Sudangrass. Prior to May 1 or after Aug. 15, add 25 Ib/acre rye (grain).
Seeding dates
Best Possible
Early spring: Feb. 15 - Mar. 20 Feb. 15 - Apr. 30
Fall: Sept. 1 - Sept. 30 Sept. 1 - Oct. 31
Soil amendments
Apply lime and fertilizer aocordingto soil tests, orapply 3,000-5,000 lb/acre
ground agricultural limestone (use the lower rate on sandy soils) and 1,000
lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre grain straw or equivalent cover of another suitable
mulch. Anchor straw by tacking with asphalt, netting, or roving or by crimp-
ing with a mulch anchoring tool. A disk with blades set nearly straight can
be used as a mulch anchoring tool.
Maintenance
0 growth is less than fully adequate, refertilize in the second year, accord-
ing to soil tests or topdress with 500 Ib/acre 10-10-10 fertilizer. Mow'as
needed when sericea is omitted from the mixture. Reseed, fertilize, and
mulch damaged areas immediately.
'Refer to Appendix 8.02for botanical names.
6.11.24

Practice Standards and Specifications
Table 6.11 q
Seeding No. 2CP for: Well- to
Poorly Drained Solis with
Good Moisture Retention;
High Maintenance
Seeding mixture
Speclee Rate (lb/acre)
Tall fescue (blend of two or
three Improved varieties) 200
Rye (grain) 25
Seeding dates
Best: Sept. 15 - Oct. 15
Possible: Sept.1 - Oct. 31 or Feb. 15 - Apr. 30
Soil amendments
Apply lime and fertilizer according to soil tests, or apply 3,000-5,000 lb/acre
ground agricultural limestone (use the lower rate on sandy soils) and 1,000
Ib/acre 10-10-10fertilizer.
Mulch
Apply 4,000 lb/acre small straw or equivalent cover of another suitable
mulch. Anchor straw by tacking with asphalt, netting, or roving or by crimp-
ing with a mulch anchoring tool. A disk with blades set nearly straight can
be used as a mulch anchoring tool.
Maintenance
Fertilize according to soil tests or apply 40 lb/acre nitrogen in Jan. or Feb.,
40 lb in Sept., and 40 lb In Nov., from a 12-4-8. 16-4-8, or similar turf fer-
tilizer. Avoid fertilizer applications during warm weather, as this increases
stand losses to disease. Reseed, fertilize, and mulch damaged areas im-
mediately. Mow to a height of 2.5-3.5 inches as needed.
Refer to Appendix 8.02for botanical names.
6.11.25

Table 6.11v
Seeding No. 7CP for:
larass-lined Channels;
Coastal Plain, Lower
Piedmont, and Dry Soils In
the Central Piedmont
Practice Standards and Specifications
Seeding Mixture
Species' mate (lb/acre)
Common Bermudagrass 40-80 (1-2 lb/1,000 It
2)
Seeding dates
Coastal Plain: Apr. -July
Piedmont: Apr. 15 -June 30
Soil amendments
Apply lime and fertilizer according to soil tests, or apply 3,000 lb/acre
ground agricultural limestone and 500 lb/acre 10-10-10 fertilizer.
Mulch
Use jute, excelsior matting, or other effective channel lining material to
cover the bottom of channels and ditches. The lining should extend above
the highest calculated depth of flow. On channel side slopes above this
height, and ' in drainages not requiring temporary linings, apply 4,000
Ib/acre grain straw and anchor straw by stapling netting over the top.
Mulch and anchoring materials must not be allowed to wash down slopes
where they can clog drainage devices.
Maintenance
A minimum of 3 weeks is required for establishment. Inspect and repair
mulch frequently. Refertilize the following Apr. with 50 lb/acre nitrogen.
Refer to Appendix &02for botanical names.
6.11.31

6moothly blend
contact area
Design thickness
-" Design thickness
Smoothly blend
contact area
0" Design thickness
z " Design thickness
Practice Standards and Specifications
V-shaped Riprap Channel
IlA--i I1111 Subgrade excavation
Filter layer, gravel or fabric
Trapezoidal Riprap Channel
E— Design top width --- W
—.._.— 2 4
Design depth I
Filter layer, gravel
or fabric
Parabolic -shaped Riprap Channel
- — I Design top width IG
g '� 1 Design depth v x s
Figure 5.3la Construction detail of rlprap channel cross sections.
Subgrade excavation
Filter layer, gravel or fabric
Side slope —Base side slopes on the materials and placement methods in
Table 6.31b.
Hydraulic grade line —Ensure that the design water surface in the channel
meets the design flow elevations of tributary channels and diversions. Ensure
that it is below safe flood elevations for homes, roads, or other improvements.
ttcw. IZ03 6.31.3

3do
16, 4
blan
Pipe Outlet to Flat Area —
Pipe Outlet to Well-defined
Channel
La
Filter
blanket
Figure 6.41c Riprap outlet protection (modified from Va MCC).
Notes
1. La is the length of the riprap
apron.
2. d =1.5 times the maximum
stone diameter but not less
than 611.
3. In a well-defined channel ex-
tend the apron up the channel
banks to an elevation of 6"
above the maximum tailwater
depth or to the top of the bank,
whichever is less.
4. A filter blanket or filter fabric
should be installed between
the riprap and soil foundation.
6.41.4

Practice Standards and Specifications
Thickness —Make the minimum thickness of riprap 1.5 times the maximum
stone diameter.
Stone quality —Select stone for riprap from field stone or quarry stone. The
stone should be hard., angular, and highly weather -resistant. The specific gravity
of the individual stones should be at least 2.5.
Filter —Install a filter to prevent soil movement through the openings in the
riprap. The filter should consist of a graded gravel layer or a synthetic filter
cloth. Design filter blankets by the method described in Practice 6.15, Riprap.
Construction 1. Ensure that the subgrade for the filter and riprap follows the required lines
Specifications and grades shown in the plan. Compact any fill required in the subgrade 'to the
density of the surrounding undisturbed material. Low areas in the subgrade on
undisturbed soil may also be filled by increasing the riprap thickness.
2. The riprap and gravel filter must conform to the specified grading limits
shown on the plans.
3.. Filter cloth, when used, must meet design requirements and be properly
protected from punching or tearing during installation. Repair any damage by
removing the riprap and placing another piece of filter cloth over the damaged
area. All connecting joints should overlap a minimum of I ft. If the damage is
extensive, replace the entire filter cloth.
4. Riprap may be placed by equipment, but take care to avoid damaging the fil-
ter.
S. The minimum thickness of the riprap should be 1.5 times the maximum stone
diameter.
6. Riprap may be field stone or rough quarry stone. It should be hard, angular,
highly weather -resistant and well graded.
7. Construct the apron on zero grade with no overfall at the end. Make the top
of the riprap at the downstream end level with the receiving area or slightly
below it.
S. Ensure that the apron is properly aligned with the receiving stream and
preferably straight throughout its length. If a curve is needed to fit site condi-
tions, place it in the upper section of the apron.
9. Immediately after construction, stabilize all disturbed areas with vegetation
(Practices 6.10, Temporary Seeding, and 6.11, Permanent Seeding).
Maintenance Inspect riprap outlet structures after heavy rains to see if any erosion around or
below the riprap has taken place or if stones have been dislodged. Immediately
make all needed repairs to prevent further damage.
6ALS

Practice Standards and Specifications
• SEDIMENT FENCE (SILT FENCE)"
Definition A temporary sediment barrier consisting of filter fabric buried at the bottom,
stretched, and supported by posts.
Purpose To retain sediment from small disturbed areas by reducing the velocity of sheet
flows to allow sediment deposition.
Conditions Where Below small disturbed areas less than 1/4 acre per 100 ft of fence.
Practice Applies
Where runoff can be stored behind the sediment fence without damaging the
fence or the submerged area behind the fence.
Do not install sediment fences across streams, ditches, or waterways.
Planning A sediment fence is a permeable barrier that should be planned as a system to
Considerations retain sediment on the construction site. The fence retains sediment primarily
by retarding flow and promoting deposition. In operation, generally the fence
becomes clogged with fine particles, which reduce flow rate. This causes a pond
to develop more quickly behind the fence. The'designer should anticipate pond-
ingand provide sufficient storage areas and overflow outlets to prevent flows
from overtopping the fence. S ince sediment fences are not designed to withstand
high heads, locate them so that only shallow pools can form. Tie the ends of a
sediment fence into the landscape to prevent flow around the end of the fence
before the pool reaches design level. Provide stabilized outlets to protect the
fence system and release stormflows that exceed the design storm.
Deposition occurs as the storage pool forms behind the fence. The designer can
direct flows to specified deposition areas through appropriate positioning of the
fence or by providing an excavated area behind the fence. Plan deposition areas
at accessible points to promote routine cleanout and maintenance. Show deposi-
tion areas in the erosion and sedimentation control plan. A sediment fence acts
as a diversion if placed slightly off the contour. This may be used by the design-
er to control shallow, uniform flows from small disturbed areas and to deliver
sediment -laden water to deposition areas.
Sediment fences serve no function along ridges or near drainage divides where
there is little movement of water. Confining or diverting runoff unnecessarily
with a sediment fence may create erosion and sedimentation problems that
would not otherwise occur.
Design Criteria Ensure that the drainage area is no greater than 1/4 acre per 100 ft of fence.
Make the fence stable for the 10-yr peak storm runoff.
Where all runoff is to be stored behind the fence, ensure that the maximum slope
length behind a sediment fence does not exceed the specifications shown in
Table 6.62a.
6.62.1

0
Table 6.62a
Maximum Slope Length and
Slope for which Sediment
Fence is Applicable
Ensure that the depth of impounded water does not exceed 1.5 ft at any point
along the fence.
If nonerosive outlets are provided, slope length may be increased beyond that
shown in Table 6.62a, but runoff from the area should be determined and by-
pass capacity and erosion potential along the fence must be checked. The
velocity of the flow at the outlet or along the fence should be in keeping with
Table 8.05d, Appendix 8.05.
Slope
Slope Length (ft)
< 2%
100
2 to 5%
75
5 to 10%
50
10 to 20%
25
>20%
15
Provide a riprap splash pad or other outlet protection device for any point where
flow may overtop the sediment fence, such as natural depressions or swales. En-
sure that the maximum height of the fence at a protected, reinforced outlet does
not exceed 1 ft and that support post spacing does not exceed 4 ft.
The design life of a synthetic sediment fence should be 6 months. Burlap is only
acceptable for periods up to 60 days..
Construction MATERIALS
Specifications 1. Use a synthetic filter fabric or a pervious sheet of polypropylene, nylon,
polyester, or polyethylene yarn, which is certified by the manufacturer or sup-
plier as conforming to the requirements shown in Table 6.62b.
Table 6.62b
Specifications For
Sediment Fence Fabric
Synthetic filter fabric should contain ultraviolet ray inhibitors and stabilizers to
provide a minimum of 6 months of expected usable construction life at a
temperature range of 0 to 12W F.
2. Ensure that posts for sediment fences are either 4-inch diameter pine, 2-inch
diameter oak, or 1.33 lb/linear ft steel with a minimum length of 4 ft. Make sure
that steel posts have projections to facilitate fastening the fabric.
3. For reinforcement of standard strength filter fabric. use wire fence with a
minimum 14 gauge and a maximum mesh spacing of 6 inches.
Physical Property
Filtering Efficiency
Tensile Strength at
20% (max.) Elongation
Slurry Flow Rate
Requirements
85% (min)
Standard Strength-
30 Ib/lin in (min)
Extra Strength-
50 IbAn in (min)
0.3 gaVsq ft/min (min)
6.62.2

Practice Standards and Specifications
CONSTRUCTION
1. Construct the sediment barrier of standard strength orextra strength synthetic
filter fabrics.
2. Ensure that the height of the sediment fence does not exceed 18 inches above
the ground surface. (Higher fences may impound volumes of water sufficient to
cause failure of the structure.)
3. Construct the filter fabric from a continuous roll cut to the length of the bar-
rier to avoid joints. When joints are necessary, securely fasten the filter cloth
only at a support post with overlap to the next post.
4. Support standard strength filter fabric by wire mesh fastened securely to the
upslope side of the posts using heavy duty wire staples at least 1 inch long, or
tie wires. Extend the wire mesh support to the bottom of the trench.
S. When a wire mesh support fence is used, space posts a maximum of 8 ft apart.
Support posts should be driven securely into the ground to a minimum of 18 in-
ches.
6. Extra strength filter fabric with 6-ft post spacing does not require wire mesh
support fence. Staple or wire the filter fabric directly to posts.
7. Excavate a trench approximately 4 inches wide and 8 inches deep along the
proposed line of posts and upslope from the barrier (Figure 6.62a).
8. Backfill the trench with compacted soil or gravel placed over the filter fabric.
9. Do not attach filter fabric to existing trees.
Maintenance Inspect sediment fences at least once a week and after each rainfall. Make any
required repairs immediately.
Should the fabric of a sediment fence collapse, tear, decompose or become in-
effective, replace it promptly. Replace burlap every 60 days.
Remove sediment deposits as necessary to provide adequate storage volume for
the next rain and to reduce pressure on the fence. Take care to avoid undermin-
ing the fence during cleanout.
Remove all fencing materials and unstable sediment deposits and bring the area
to grade and stabilize it after the contributing drainage area has been properly
stabilized.
6.62.3

Figure 6.62a Installation detail of a sediment
fence.
Backfill min 8"
thick layer of gravel
10 14 " -0
Extension of fabric and wire
into the trench
RefereneeS RunoffControiMeasures
6.20, Temporary Diversions
Outlet Protection
6.41, Outlet Stabilization Structure
Sediment Traps and Barriers
6.60, Temporary Sediment Trap
6.61, Sediment Basin
Appendix
8.03, Estimating Runoff
Compacted fill
Filter fabric

SAND RIDGE
Carteret County, NC
Stormwater Project No. 931006
• A Rol
010
110.
24 4ESS%.q
.
SEAL
9180
F
*041 Goo
Narration .fo- Drainage Areas 111101J#841 lists""
The developer has disturbed more than his original permit allowed.
Therefore, his application has to be amended. His future needs
require him to develop a second outlet as the original is not of
sufficient size and depth in its present condition to adequately
drain his entire property. It has been decided to develop a
comprehensive plan that will adequately collect and treat the
stormwater generated by the possible total. future development.
This comprehensive plan takes some of the stormwater away from the
original area permitted but also adds some future lots in DA #3.
All lots in DA #2 drain in the exempt system and have the
appropriate restrictive covenants recorded. When the lots are
developed and recorded in DA #3 they will be made subject to those
same restrictive covenants. Property in DA #1 and DA #4 will have
their stormwater collected and treated. Therefore, regulations will
not require that they be subject to those same restrictions.
The area is extremely flat and they soils are pervious so that the
ditch flow velocity will be minimal. Each identified drainage area
flows into a single Swale before leaving the site or entering the
stormwater control pond. Therefore, .if at the point of maximum flow
the velocity is acceptable for grass swales, then the remainder of
the swales in that drainage area will also be acceptable. Velocity
check locations are shown on the revised Soil. and Erosion Plan. A
velocity check of the outlet ditch of the new system has also been
checked.
p ECEIVk
D
OCT 2 4 1994
DEM
pRoj g3/00(v
1

Outlet: Design
2 year 30 minute rainfall 3.2 in/hr
Fig. 4-3 Page 140 Handbook of Steel
Drainage ARMCO
Time of Concentration
Fig. 4-6 Page 144
Conversion
Factor Equiv.
Length
Grassed Swale 890 ft
1.0
890
Pipe 30 ft
0.2
6
Curb Line 400 ft
0.4
160
Overland 180 ft
2.0
360
Distance to enter figure
1416
Difference in grade 5.0
therefore 17 minutes TC:
Page 141 Chart 4-1 gives conversion
of rainfall due
to time of
concentration (a) and Chart 4-2 gives
conversion design storm
years (b )
Rainfall intensity X(a)x(b)=Adjusted
intensity
3.2 x 1.36 x 1.6 = 7 inches
Q - CIA
I = 7 inches per hour
A = Drainage in acres
C - Weighted runoff co -efficient
Road areas
Parking lot
Impervious surfaces
(per home site)
Apartment roof area
Pervious soil turfed
A x I x
1.67 x 7 x
0.87 x 7 x
3.23 x 7 x
0.66 x 7 x
15.57 x 7 x
Figure 4-18 pg. 161
36" pipe 37.92 CF1,
1.1 x 3.0
Grade
Surface
C
CFS
.80 =
9.35
.80 =
4.87
.75 =
16.96
.75 =
3.47
.03 =
3.27
37.92
1.1 HW/D
:3.3
24.3
27.6
2

Storage in Stormwater Control Pond
Cubic Feet
Area x
C
x Rainfall
Cubic Feet
Road Area
1.67
.80
.0833
4848
Parking lot
0.87
.80
.083:3
2525
Impervious Surfaces
(homesite)
3.23
.15
.0833
8790
Apartment Roofs
0.66
.75
.0833
1796
Pervious Soil Turfed
15.57
.03
.0833
1695
19, 65 4
System designed for 2.0' rise in storm
2010 Lineal feet of swale
Average elevation of bottom of swale 25.7
5,2 I 5.2-1
27.0
4 6.76
1
6.76 x 2010=13,568
25.7 cu D".
Needed total of 19,654
By Swale of 13.588
Remaining of for pond 6,066
3

Velocity Check DA #2
Check calculated at location of highest flow in DA #2
In calculations prepared 6/29/93 for the previous permit and
Approved by the state 7/29/93 a runoff co -efficient for the
original subdivision was determined to be .23.
In those same calculations an intensity of rainfall. was determined
. to be 5.75 inches per hour.
DA #2
Q C I A
Q .23 (5.75) (3.2)
Q = 4.2 cfs
Determine hydraulic .radius
Assume 1 foot depth
.,-
S (slope)
+
- 0.. -3 - 0.
.5
�UU
n = .04 from Table 4-5 pg 146 ARMCa
1� 4 84' / R �-) /
n ( `
_a
V V r .3
Check ]depth of flow
1 4.3 / Y Z-
,G
AV
. V r
A 14 s'
.Z-
."r
el A'
14 -1 14
1`r-

Velocity Check DA #3
Check calculated at location of highest flow in DA # 73
In calculations prepared 6/29/93 for the previous permit and
approved by the state 7/29/9:3 a runoff co -efficient for the
original subdivision was determined to be .23.
In those same calculations an.intensity of rainfall was determined
to be 5.75.inches per hour.
DA #3
Q = C I A
Q = .23 (5.75) (5.2)
Q = 6.6 cfs
Determine hydraulic radius
2. L � i
Assume 1 foot depth
S (slope)
n . _ .04 from Table 4-5 pg :1.4 6 A.RMCO
4, f? " "" )
4.
C > . , .) C
V -
o .
4- Xr
o
Check Depth
of
flow
AV A
2_
x

Velocity Check DA #4
Check calculated at location of highest flow in DA #4
in calculations prepared 6/29/93 for the previous permit and
approved by the state 7/29/93 a runoff co -efficient for the
original subdivision was determined to be .23.
In those same calculations an intensity of rainfall was determined
to be 5.75 inches per hour.
DA. #4
Q = C I A
Q = .23 (5.75) (11.2)
Q 14.8 cfs
Determine hydraulic radius
2 G. T
Assume 1 foot depth
n .04 from Table 4-5 pg 146 ARMCO -34
c.. 4
PP
Check Depth of flow
Z-
2 C<
c� ' Y
4-
j - 2 ,7
I'r-
5
13

Pipe.Size Check DA #1
Check calculated at location of highest flow in DA #1
Cubic Feet = Area x
Road Area 0.69
Parking lot 0.87
Zmpervious_Surfaces
(homesite) 0.69
Apartment Roofs 0.66
Pervious Soil Turfed 3.47
Using Figure 4-18 pg 161 AJU4Cd
24" pipe 12.7 cfs = .9 HW/D
Using Figure 4-22 pg 166 A104CO
24" pipe 12.7 cfs = .8 HW/D
C x Rainfall Cubic Feet
.80
5.75
3.2
.80
5.75
4.0
.75
5.75
1.9
.80
5.75
3.0
.03
5.75
PIS
12.7
M
MI
I',.
7

a
Velocity Check Outlet Ditch
Check calculated at location of highest flow
Determine hydraulic radius
4
Assume I foot depth
S (slope)
'2 C " C-- I
n - .04 from Table 4-5 pg 146 ARMCO
Z)
104
Check Depth of flow
4-J '2- --
M.

Orifice Design
Cubic feet of storage for 1" storm is 19,654 cu ft.
Rise in pond system is 2'
Use Formula Q = A x Cv 1--gh
Q Equals flow (Avg During Draw Down)
A - Area of Orifice
CV - is coefficient .9R
g - 32.2 gravity
h 'o of 1" storm rise in pond (Avg During Draw Down)
Pond rises 2' if desired draw down is between 2 and 5 days -use 60
hours
Determine a desired Q
Q 19,654 cu ft / 60 hours / 60 minutes / 60 seconds
Q .0910 efs
a'7ra
(�z- )(� j
J ,Z
D.
Use 1.5" diameter orifice
Check actual drawdown time
19.654 cf / 60 seconds / 60 minutes = 56 hours 34.5 minutes
0,0965 cfs
�7

State of North Carolina
Department of Environment, Health, and Natural
Wilmington Regional Office
James B. Hunt, Jr., Governor DIVISION OF ENVIRONMENTAL MANAGEMENT
Jonathan B. Howes, Secretary WATER QUALITY SECTION
September 27, 1994
Mr. Gary Barker, P.E.
Barker Engineering Service
Post Office Drawer D
New Bern, North Carolina 28563
Resources
Bob Jamieson
Regional Manager
Subject: Deed Restrictions
Newport Sands Subdivision
Stormwater Project No. 931006
Carteret County
Dear Mr. Barker:
The Wilmington Regional Office received a copy of the recorded deed restrictions for Newport
Sands Subdivision on September 19, 1994. Unfortunately, the document records deed restrictions for
a subdivision by the name of Sand Ridge Section I. Has there been another name change? If not, please
submit the correct deed restrictions, recorded in the name of Newport Sands, prior to October 27, 1994.
If you have any questions, please do not hesitate to call me at [phone].
Sincerely,
Linda Lewis
Environmental Engineer
DA/arl: SAWQSISTORMWATILETTERS1931006.SEP
cc: (2) Linda Lewis
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 0 Telephone [phone] • Fax [phone]
An Equal opportunity Affirmative Action Employer

ROBERT H. DAVIS, RLS rraa i
SURVEYORS AND PLANNERS
7175 HIGHWAY 70 EAST
NEW BERN, NORTH CAROLINA 28562
919-636-2109
September 23,-1994
Mr. Mike Adkins
Water Quality Supervisor
N. C. Department of .EMR
127 Cardinal Drive Extension,
Wilmington, NC 28405-3845
Dear Mr. Adkins:
Enclosed please find preliminary plans and calculations for Soil and
Erosion plans for Sand Ridge•jy: Newport Township,.,Carteret County.
Additional plans and calculations will follow.
sincerely,
f�
Robert H. Davis
Registered Land surveyor L-2432.
U
SEP 2 7 1994
'PROJ at i c�oco

GAi';Y C. BARhI:I", P.E.
BARKER ENGINEERING SER-VICE
Mr. Dave Adkins
Water Quality Supervisor
Division of Environmental Management
127 Cardinal Road Extension
Wilmington, NC 28563
Dear Mr. Adkins,
T 0 R V- -41 A T F R
uD
SEP 1 9 1994
DIEM
IPJ&oJ q 3 l 0
Ref: Stormwater Project No. 931006
Newport Sands Subdivision
Carteret County
Enclosed are Restrictive Covenants and Engineers Certificate for the
above referenced project. The certificate covers the project as applied
for and the subsequent amendment.
My last trip and your office's last inspection reveals that additional land
disturbing activities have occurred. The developer has continued those
practices required in the permit and has now employed us to submit a
modification covering the remainder of their property. This will follow
shortly under separate cover.
Sincerely,
zg�o;"
Gary C. Barker, P.E.
P.O. DRAWER D
233 MIDDLE STREET
NEW B ERN, NC 28563

3.3
r
1
vla,w, /Z Y":�, L.,
K <„ AA--
'Z 4
'?/'F- < a4- - —2 i0 ?

AN Apk
° D
SAND RIDGE JAN 2 0 1995
DEM
0J # - 3 /00 fv
This project is located in the Town of Newport. It contains
approximately 23.42 +/- acres. Except for a small section developed
as an exempt area in a previously permitted section (permit #931006)
all surface -waters will be collected in a storm water control pond
and treated before -they are discharged to the canal on the southern
side of Bayberry Road. The property is primarily cleared at this
time. The first step of construction will be to construct the storm
water control structure in conjunction with clearing and grubbing.
Next the site will be rough graded and drainage ditches will be
constructed. Underground utilities will then be installed and a
temporary ground cover of rye will be planted. After construction
of the apartment buildings or homesites is completed, final
landscaping and permanent vegetation will be established. It is
expected that from beginning to completion of site work will take
120 days. Construction of the buildings or homes will take 8 to 10
months from the completion of the site work.
For the ten year storm calculations 6.6 in/hr. was utilized. For
paving and concrete a.coefficient of 0.95 was used. Roof areas were
assigned 1.00. Grassed areas were assigned a "C" of 0.20. It is
expected that volunteer vegetation will grow and provide enhanced
treatment in the forebay and safety shelf areas. The pond was
designed with SAM ratio in mind producing only a two foot rise
with a one inch storm. An orifice 2.75 inches in diameter will
release this storm in two and a half days.
The ten year storm required a 48" CMP. Due to vertical restriction
of a road bed twin 36" CMP will be used for one section.
The area labeled DA#1 is part of a previously approved project that
used density limits and did not flow into a stormwater control pond'.
The area served by the existing filter basin has been drastically
reduced and has been diverted to DA#3 which will be collected in
surface swales and catch basins and treated in the stormwater
control pond. Both DA#2 and DA#3 are collected in tha arnrmsrnrcr
control pond.
1

Storage Required for Stormwater Retention Pond
Q - CIA
C = Weighted runoff co -efficient
I = 1 inch per hour
A = Drainage Area in square feet
C x
Roof Tops 1.00
Paving 0.95
Grassed Area 0.20
Determine Pond Size
I x A =
CF
.08333 2.46(43,560)
8,930
.08333 5.25(43,560)
18,105
.08333 15.71(43,560)
11,405
23.42
38,440
Roof Tops 2.46 Acres 7.7.1 = .33 impervious
Paving + 5.25 Acres 23.42
Impervious 7.71 Acres
SA/DA -'> 90% TSS REMOVAL
FOR WET DETENTION WITHOUT VEGETATIVE FILTER
per Water Quality Section NC DEHNR
Imoer $
3.0"
3.5'
4.0'
4.51
5.01
5.51
6 0'
6.51
7.01
7.51
10
1.3
1.0
.8
.7
.6
.5
.4
.3
.2
.1
20
2.4
2.0
1.8
1.7
1.5
1.4
1.2
1.0
.9
.6
30
3.5
3.0
2.7
2.5
2.2
1.9
1.6
1.3
1.1
.B
40
4.5
4.0
3.5
3.1
2.8
2.5
2.1
1.8
1.4
1.1
50
5.6
5.0
4.3
3.9
3.5
3.1
2.7
2.3
1.9
1.5
60
7.0
6.0
5.3
4.8
4.3
3.9
3.4
2.9
2.4
1.9
70
8.1
7.0
6.0
5.5
5.0
4.5
3.9
3.4
2.9
2.3
80
9.4
8.0
7.0
6.4
5.7
5.2
4.6
4.0
3.4
2.8
90
10.7
9.0
7.9
7.2
6.5
5.9
5.2
4.6
3.9
3.3
100
12.0
10.0
8.8
8.1
7.3
6.6
5.8
5.1
4.3
3.6
Actual % = 33%
Interpolate between 30% and 40%
Pond Depth of Permanent Pool = 6.5
SA/DA must be 1.5 or greater
Minimum SA = .015 x 23.42 x 43,560 - 15,302 SF

9
DESIGN OF POND
SA @ 25' elevation = 17,564 sf
SA @ 27' elevation = 22,228 sf
Pond has slope of 4:1 above 25' elevation, assuming 2' rise
calculate storage of pond using average end area method to
determine volume.
Calculated volume = 39,792 cf
Required volume = 38,440 cf
OK by storage volume and SA/DA surface area calculations.
DESIGN OF ORIFICE
N'
Q(2 days) = 38,440/172,800.= .2225
Area .= [.2225/. 6 2 (3� 2.2) 1] 144 = 6.65
Radius = 6 /x - 1.455"
Diameter = 2.91"
Q(5 days) = 38,440/432,000 = .0890
Area = [.0890/.6 2(3� 2.2)1]144 = 2.66
Radius = 2� 66%R = .847"
Diameter = 1.69"
Use orifice 2.75" diameter
Actual drawdown time 53 hours 46 minutes OK
3

r
Outlet Design
Time of Concentration 6.6 inches/hour
Q=CIA
C = Weighted runoff co -efficient
I = 6.6 inches per hour
A = Drainage Area in acres
Roof Tops
Paving
Grassed Area
C x I x
1.00 6.6
0.95 6.6
0.20 6.6
A =
CFS
2.46
16.2
5.25
32.9
15.71
20.7
69.8
Figure 4-18 pg. 161 ARMCO Handbook of Steel Drainage
See copy on next page
Use 48" CMP
Invert 24.6' + 41.of head = 28.6' max elevation of pond
Note this pipe will not clear roadway
Check twin 36" CMP
Invert 24.6' + 3' of head = 27.6' max elevation of pond
Therefore substitute twin 36" CMP for section from the
pond to the open ditch
4

HYDRAULICS OF CULVERTS
tta
161
- leo - --
- 10,000
- 16s
- s,000
LOSS COEFFICIENT Ke
(I).
lye
- 6,00o
FOR VARIOUS ENTRANCE
121
5,000
TYPES
6•
144
- 4,00o
HW I ENHANCE
SCALE COEFFICIENT
_ 6.
- 13E
p TYPE
- I!O
�j
fU Heodwal4 sq. edger or End 0.5
Seplon conforming to till
- 1,000
dope
y.
- IOs S`
_
171 Mitered to conform to dope 0.7
4.
Q
17) Prolecting from All 0.9
- 31
' 4.
2
-
- se
1.000
3.
00
3.
To use sale (7) or 171 project
- s4
- 600
horlsontolly to scale Ill, then
.- 300
use stralghl Inclined line through
- !.
D and O scale$, or rererse as
400
Illustrolad.
T!
!
300
too
.60
c
t'
- y4
- goo
0
-4s c
eo
0
`
- 60
-
c
—
_
1.0
-1.0
36
- 30
Dlom. lol--161n.-4A
33
Q+70irs
-.s
go
scale lrw
- s
- s
- 30
_
..6r
--
n► Lo t.oD.
-----
—
•6
- 27
10
111 1.0 4.0
- s
(7) 1.1 �.�
- .7
- .T
• !4
-
-6
- .T
_y
91
-4
-3
Is
•.s
LL.6
1.0 y
HEADWATER DEPTH FOR
Ix CORRUGATED STEEL PIPE CULVERTS
WITH INLET CONTROL
Fig, 4 18, Inlet contror nomoggrapph for corru8ated steel. plpe culverts. The manufac-
turers recommend keeping HWID to a maximum of 1.5 end preferably to no more
then 1.0.
5

DESIGN OF OUTLET DITCH
Assume 4' bottom width and 4:1 side slopes
A = 4d2 + 4d
WP - 2-5 d2 + 4
R = (4d2 + 4d)/{2 5d2 + 4)
S = slope in feet/foot
V = (1.486/n) (R213) (S112)
Try d= 2.5
A = 4 (2.52) + 4(2.5) = 35 sf
WP = (245 (2.52) + 4 = 15.18
R = 14(2.52) + 4(2.5))/{245(2.52) + 41 = 2.31
S — 0.3/300 = .001
V = (1..486/.04) (2.31213) (.0012/2) = 2.05 fps
Q = AV = (35 sf) (2.05fps) = 71 cfs
6

• Y'• - - - -- i - - - - - - - - - - - - _ _ _ _ _
yaI -
a a . •ri
— rJ C`-.try .t - � _ — - - -i4-� •v. f� � y. �ii �.i 'Yi. _ r-:�
�a— Typ _^ ��>. tires••_ - -
-
-
- - ••tom - - - `__ �Cr - -
- ��`• ::¢ - rya _ '.i°-.- _ �r -�__-.
112.5 A. 1274 L
p N .•
0 1 O p 1134 O
c7
1247
1133
TP A 1129 u,
3 .'O
I \
I 1129 •5 " 6 I 1133
1 126 .2 1206 i b 4 11 1 137 •4 1139
.9 {137
1124 1638 t'r
1138
1637 '
Jv
1283 = '�
o a = NEWPQRT
1290 S
/ r w ;o 1247 POP: 1,883
4 1276 ,> 1140 -?�}
_6:
i 1` 1154
ORT 1282 .9 ' n 2 3 =:;..•
1112 'cr w 3• ? .�
5 1211
70 V 1247
•. ••• .� 1148
1 124 r �'
1141 I 1252::...,- 1149
1298 0
Wildwood
7.2
a 1263 v 1 I Ah ' 85
128 1
'' ..8' `•• 1147
114
1.3. f1►P
2.2 ::::::::.:::::::: • 144 .6122 rF
143
pA T WATER WA y----------
121 --- INTRA

N O
no
J n��
U] 0. Li
T Y
ca
J.
to N r Af .. o' ///111�{L O
L�• c r 4 �1 08
t' } f- t S c � 0 �1
Ol �} I f (/,
r
'
i`i
C90
rn
C, V'T�" f ,Y' i� s .'�.X (n" v'(� • -pie tl
10
'� s�� 1 ,,t•�y 0:� y�x �'� t4< 4.9n ra � y
�
qs.�r m l • y Xa�r ernmea' O
/•-p' /'. A. 3t� Ya6� 1 t •J ti �k'$=r ; �.A. II �"7 Wp.
�Ra� 1 •� "S•�a,°•F.,s 3�'.,�t,.w�c_,�Sl p. ^+ ,�
�ltF n� r CD y c t
/� a +r f a• 1��,J tEAitW ryNa C 4WD ' pf��' 1
1 t �•r '�.t 7 � .._ "'� tti�'4 i��� A: a5 I 4R• � w
(i`Qw'(/,r�,,o �;, :`y;� .t ;' ,ef(� ���� �':ki74•.!'.'�i���& �+� R t� r �i�
.cvt arc . � , .. � . �i•. C I .°:1 wl7ao,_ ro° na^',y.W4.. 1 � 5
—P „a one&Apto
"uq,M
�' a f �"'6'C ✓ F 'Si' ��' i "I q B/
Y11Kek"d{3�,iT1iu
:a r Y tit�ssdry bM5 ep
�`� `�• �rs<�, '' �;,� '� ��i:ti`� ;;11rf. I'Riff,ga ' �. i � y 1%
tg »h6 9N -40 S21af]1TnR isn,;N 6LGZLO06TS 90:9T 86ST/8I/ZZ