SW8120911_APPROVED PLANS_20150618

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 I Zoq I I
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
Z o t5 0 (4
YYYYMMDD

Z v 007 - Swale 7 -
_ DA `12 acres
1.
\ ,. S Te "10min .
.1 ro 1(2F) = 7 inlhr
`�l� . a IP d12 �- 5, nliTr
\ .
\\ Nl SF o U e07 cis: ,
k' - d 100 = 0.V rass, n=0.045 v=1.6 fps
\� _ �F, d�100� = 0.6' earth, n= 0.020) v= 2.9 fps
A ,i��� ��,� use Excelsior Mat lining
Oi
�/p
)' 4'P Note: All Drainage Easements must remain
free and clear of obstructions Including
jj fences, � . s, shrubs, and landscaping that
may obstfict stormwater flow. The property
owner and ' or the HOA is responsible for
/ 8 maintaiei� i Drainage Easements.
\ #
��.1
0.87 A es
- 0.26.0 f ote: All rids to be ocated' .
11 "I'thin Co on Area and dedicated
, , Drai a Easement (typical )
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STANDARD NOTES•
1. Information .concerning underground utilities . was obtained from: .
.
available records. it shall be. the responsibi1.lity of the.:
..
Contractor to determine the exact 'elevations.. and .locations: :. .
of all existing utilities at all. crossings prior to
commencing trench excavation. if':actual clearances: are less
than indicated on Plan, the Contractor shall contact the
Design Engineer before proceeding with . construction. .
Any condition discovered. or existing that would necessitate
a modification of these plans shall be brought to the attention
of the Design Engineer before proceeding. with construction.
2. NO CONSTRUCTION IS TO BEGIN BEFORE LOCA710N `OF. EXISTING.
UTILITIES HAS BEEN DETERMINED. CALL -"NC ONE-CALL"'AT LEAST
48 HOURS BEFORE COMMENCING CONSTRUCTION.
3. All trees which are not required .`to' be cleared for
construction shall be preserved wherever possible unless
otherwise directed, .
. 4. Contractor -shall adjust' all manholes; valve and curb boxes' to-
. .
the final 'grade., upon completion` of. all. construction. Any boxes
damaged or otherwise disturbed.. by, the Contractor shall be.
repaired at the expense of:;..the Contractor.
,. .
5. The Contractor is responsible for ,con1.trolling :dust and: erosion
during construction at his expense. Parking areas sh1.all be
watered to control dust . when ordere1.d by the .Engineer
6. No geotechnicol testing has been performed . on - site . No
warranty is made for suitobility'of subgrode, :and undercut`. and `
any required replacement with suitable material shall. be' the
responsibility of the contractor...1. .
Contractor: responsible for`geotechnical testing as nec1.essary.
7. Extreme care shall be token to .ensure minimum separations at
all utility crossings. .
8. Contractor to ensure that pavement is placed so as to drain
positively to. the curb outlets .and. catch: basins.: All; roof
drain downspouts to be directed to `the storm sewe1.r system. -
9. Contractor is responsible for obtaining all required permits...
10. This plan is for site utilities, grading, roadwork, and drainage only.
11. Affected Non -Municipal Utilities shall. be. contacted and `provided
with plans and other pertinent information, when feosible, .to
coordinate appropriate. scheduling and placement. AitJhe.minimum
this should1. include AT&T and Progress Energy. .
12. Contractor and Builder are responsible for coordinating Finished
Floor Elevation of all buildings with.. the. Owner and the : Architect:
13. No encumberonces in R%W except` as shown .. .
MI 1.ORE GENERAL NOTES. -
1. ALL CONSTRUCTION TO ;CONFORM TO NEW HANOVER COUNTY:. STANDARDS
AND APPLICABLE STA1E'''& `LOCAL CODES.:
2. CONTRACTOR TO COORDINATE ANY REQUIRED 7RAFFiCXONTROL WITH .
NCDOT AND. CAPE�EAR PUBLIC: U77LiTY AU7HORITY
3. CARE. SHALL BE TAifEN DURING FiNAL GRADING TO EN UREI POSi1)VE:
DRAINAGE AWAY FROM BUILDINGS AND TO. RECEIVING STRUCTURES.
4. CONTRACTOR IS RESPONSIBLE FOR COORDINATION OF ANY,RELOCAVONS,
RE -ALIGNMENTS DISCONNEC71ONS OR. CONNECTIONS OF EXISTING
UTILITIES WITH APPLICABLE AUTHORITIES...
5. CLEARING AND GRUBBING OF SITE. TO. INCLUDE REMOVAL OF; EXIS77NG
CURB, ASPHALT, INLETS, AND ANY OTHER STRUCTURES INCLUDING TREES,
STUMPS AND DEBRIS EXIS77NG ON SiTE. . TREES NOT. REQUIRED TO BE
CLEARED FOR CONSTRUCTION SHALL REMAIN UNLESS OTHERWISE. DIRECTED.
6. MINIMUM SEPARA77ON SHALL BE. MAINTAINED AS FOLLOWS:
a. HORIZONTAL CLEARANCE OF 10 FEET BETWEEN SANITARY SEWER AND
WATER MAINS.
b. WHERE VER77CAL CLEARANCE IS LESS THAN 18" BETWEEN . SANITARY
SEWER AND WATER OR WHERE SEWER..LINE CROSSES ABOVE WATER
MAIN, BOTH PIPES SHALL BE DUCTILE IRON.. PIPE FOR A -- MINIMUM .
. OF 10' EITHER SIDE OF CROSSING.
c. WHERE VERTICAL CLEARANCE IS LESS THAN 24". BETWEEN SANITARY
SEWER AND STORM DRAIN, SANITARY SEWER SHALL BE DUC77LE: IRON
PIPE FOR A MINIMUM OF 10' EITHER SIDE OF.CROSSING
d. WHERE VERTICAL CLEARANCE IS LESS `THAN 12" BETWEEN WATER.
MAIN AND STORM DRAIN, WATER MAIN 'SHALL -BE DUCTILE IRON
PIPE FOR A MINIMUM OF 10' Ei THER?. SIDE OF CROSSING
7. SEE DETAIL SHEETS FOR TYPICAL UTILITIES: HOOKUPS. .
.. -
VEGETATiVE PLAN
n with
1. Permanent vegetation to be established in accordance 9
"North Carolina Erosion and Sediment Control Planning and
Design Manual% Section 6.11, latest version. See next Sheet.
r + ommon i4fie -and"dedlcat \ -.. ...: `- GC + r $ / + / r y r r / ♦ = r'1 r , # l r r / r r T ,e , , / f/ ✓ r ! .o � /ram , • r • , ,.. • / : / ♦. >. _ +.. �-t • , + • i + + . f.. <. L- .�, �;_ a / / -
\ .. r� G n + , / r r r / , , , yrT�, + • , r , , • , , , r , , /_✓r r , , ✓ �+r / / , + , / • + r / y.. ice: / / A , • r ,ram r. ;� " i:. / r. - .:. .
____
K \ .. ,_,__cry_ �- MARTIN VENTURES IV, LLC NOTE:CURB INLET BOXES TO BE SIZED AS
- ..: � - \ : - . C . . • - r / r r , , r , , , "o r / + / , r , + , r , r ) , • + + i , /i, r r f S r r , � J r .� :�-fir\+- . - r 7 r s. -r- I'e : -r- �.L-r--r
r r \ P�- v / � Cs SPRkN fd�M �_
G .. \ . - -- OP 46 PG 657
\ OP .. r r , , , r „ r r „ r , r r + r. , , r , • , + • . i , . , / , , , , , ,\+ +>-. , , �' BK 44 NECESSARY TO ACCOMODATE OVERSIZE PIPES.
. ...... - - . . \ + r , r y / �'� 1�f:. _ ,` r \ram i + + rc
\ / i - \ .r w \ H SF ►-
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..: _... � .. -i • r � � .7 V5 _ / r _ �_ / �J• :I��/ _ 'jam •: _ - ,ri+--�r�„L.��i+ r r + r7�r✓�+�
.. .. .. \ .\ ` ..� / , r, r r �„�i r , / , , r �/r !r , / r r , • + rQY ri- r +-"i a-♦- r r r , +: r , + , r !�^v- r-v-,-v r i v .. +...,r.r-♦- r/ r r , �: 1 ��
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SF - �.� - Q � .... - , , •�i r + r�i •!I ,� / • + i i �, • i r_, i r -r -v r - - r , , . / � - n .
..' .. ..� .. 1 ..� .. /� , • • • r r r -ir r r , � >✓ T r r + r r , r + rr1 , , r / r r / r..r. /.� r.,/.r,., r -i r i-./ + .. l�
s 1 s�
ine receiving channel
. r r + i / - / , r + ��r� r r r _rrrr r , r , r r�/�, , , , + / MBA , .,. �r r , ,./ r / r ,--,: + r��i-,_��- r ♦ / r , r , i , r�riy�C �\p'-LA r r +..:, �.. -
: .. / /" - �- \ - with Excelsior Mat
\ :. \ `\ r//, • + r , ✓�✓ r ,�.. , �f ���T i , + , r +�_ i r + r • r r f�„ r , / r / f r r r .r r i _r r r , �i, r + + i / r , , , r�+ • , + ^///�/. r , :r"i , + + i:.:r , , r 0` .r
.- / ' -� _ }�,,�
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\ r + r e , r , , r r r r r r r l r , �r , � r / r i , r -, / + �-.•� r , / i `r r + r • , , , , i
(`71r
\_44.0. 1�-- / / / ,/r + r r +�!, r vim! + r ��: r r ,/: f ,LEI, r , , o r�. , r + r .. NOTE WELL
r
, f r r , r r r • / r + ::, r i , .+' , .:'+ 1: EQUIPMENT CLEARANCE MINIMUM 16 FROM
.
. .. • .. - \ " .. ` . + , I r , , • , , + -v�o , r / , -/ % ♦ , , , ♦ � , i , �- , ..I , Y + r: •�/ , / , ' � / o e , �r' , r r +� , r r +. , r , , e .i , r . r ' / '-/ .. ` .
. ,. , . /\ r + , ,/ / /r / • j /�� _ _� v i _ TRANSMISSION LINES TO BE MAINTAINED
. Z ..:. , .. . \ r , , , , , Y , s , , • • , + , , i + + / , + , / , r / r , + / , r , r - / �,.. - r r r , i , i T7 -i" r-/ r - I • , , / e / , , + , , , r , i / , , , : � -..,TRANSMISSION
TIMES. (REFERENCE: OSHA 1910.2691. .
. .. , .,.. + Ir r r : , ,
/ / 2 ANY TREE R HR B O S U CAN BE PLANTED. WITHIN THE RI HT -OF WAY
•
y G
Y -
:.- - _'\ WAY/, .. + , , // r , r , r • • •�/: 0 11 - 'T"r-, r AS CONGAS THE MATURE' HEIGHT IS 12 FEET OR LESS: ..
. 4\4A.
.... , ,- , _,: •11 , ::,--,., ., ,. ,.. r' I , , , ` - Vim/ \ W J� + , , , + + / , , / , / , ,/,1 / , • r ,
( � WHEN PLANTING TREES AND SHRUBS;`PLEASE REMEMBER TO
/ / r 1 , / / I • r I / • / , I / I / „
I •// r I/// I I I/ t
/ • /♦ / � SUFFICIENT P /� LEAVE SUF IC NT SPACING TO ALLOW UTILITY MAINTENANCE
- MA NTENANC
Y ..
. �' Q / . , +. i r4 i , • '> \11 (` .��-,I , , , r i /% / ,%o • y/, / , // r • , , , /� , ,/: r + . '; / .�T , / , , . r r r // r , . , VEHICLES ACCESS WITHIN THE,RIGHT-OF-WA . -
r , I, I , -, ,., / : , , •. r / + , /-,-�---_/ � / / 4e, , . , 9,, , , r., ,/r , r ; r , �, r r , , r , r , , , , , . -_ / NOTE-YYGLL•
. - . � c / I / / y / / �, r /, r / , � + , . . .. # ONTR TOR , , • , r , , r r C AC TO .ENSURE THAT
. , .• i ,.I'. f r., / , , r , r , , o�,',
l , • , �r ,/ /, J i
4! / - /
[. J ��`. /. r r + / , r . i i + • \ r i , . I I /r/i , , /r , , i r + , + r/� r r �, r /r , • f7J / �s�+- , r /-r / / / ,I / .. / r 1, •rrrr r r STREET PAVEMENT&CURBINGIS
/� . .11 / PLACED SO AS TO DRAIN POSITIVELY
/ /
i
r
q / r rr+rr
• �� / T 0-CURB::INL S: AND DRAINAGE
+ , �30" ET AI AGE c _ ,r
E FL00 t .
_ 28 ,
6� r /, r. .�,•+, -
­ � . A ., I � .1 . . .. 0�1
Ir � � r - STRUCTURES
� o J
_ � Tr
NO TE. 4�4 WETLANDS +�N SITE TE AS SHOWN.
g T. NOTE DELINEATED 404 WETLANDS LINE
.
tfi ti LL•
�
W
HAS BEEN .APPROVED BY THE US . .
. �: ..sEOIMENT BASIN
STABILIZATION TIME FRAMES:
� ' .
M
` A NGINEERS.. SEE R RMY CO PS OF E
SoPractise .6.61 ....
SITEAREADESCRIPTION STABIt_IZA110N
91..L,..::
ACTION ID: SAW-2008-03315.(EXP DATE 8/30/17)
..
The. Sediment Basins are to be constructed (see
,
.
._
ri a Pra tics to .event
h ule as the m r c
onstruction Sc eel C P P Y
rimet r dikes swales ditches and slo es
Pe e p
7 DAYS
.
.
_ . sediment from. leaving the site. Detailed design and spillway ..
` ::;: ; configurations are specified in the cetails as shown on this
High Quality Water (HQW) Zones .
7 DAYS
MARKET sT.
Plan end the: Narrative. The PVC a�tlet is to be attached to the
Slo steeper rthan 3:1
7 DAYS
.
skimmer during the sedimentation function until entire
watershed is permanently stabilized and pond is converted to
Slopes 3:10rflatter
14 DAYS
_ .
.
._ -
permanent stormwater management detention / retention
All other areas with slopes flatter than 4:1
14 DAYS
' .; ' - h
.
function...The Contractor will then iretall the control orifice
h Sheet 5 and in the caleulotions
; :
- 1. -
to spec ca ons as 9 awn on
NOTE WE ,
LUUM I
IU14
-. � . L
MAP
8. INLET PROTECTION •
0 = .
I
ANYAREAS OWSiTE WITHOUTACTMTY SHALL BE STABILIZED WITHIN
15 WORKING DAYS AND AS ABOVE. ALL SLOPES
6.51
NOT TO SCALE
OPractice
P Storm sewer inlet barriers of hardware cloth and gravel Inlet -
MUST BE STABILIZED WiTHIN 21 CALENDAR DAYS OF CEASE OF ANY I . -
protection are to be constructed to help prevent sediment from
ACTIVITY - _ , -
nterin the storm -sewer's tem. After permanent stabilization -
9 Ys P
.. _o ...
of the entire contributing watershed area, the storm sewer
system b to be flushed to remove accumulated sediment and
DETAILS SHOWN ARE TYPICAL OF INSTALLATIONS REQUIRED BY CITY AND COUNTY
THIS SHEET DOES NOT PURPORT TO SHOW ALL REQUIRED CONSTRUCTION DETAILS, BUT
ensure design flows..
CITY COUNTY AND STATETE CODESRATHER SERVES AS A GUIDE. EAND CONSTRUC110N STANDARDCONTRACTOR IS RESPONSIBLES ADHERING TO ALL
..
.
.
hnical testis has been performed on site. No warrant No geotec 9 P Y
OB 9. BAFFLES:
is made for suitability of subgrode, and undercut and any required -_ I: -
Practice 6.65
replacement with suitable material shall be the responsibility -' ' . ..
Porous baffles are to be installed a'ter pond excavation of the contractor. .
to spread stormwater flow and decrease velocity. The installation
. should be similar to a sediment fence w•;th materials such as
700 g/m"2 coil, erosion blanket, coir mash, or tree protection
. fence folded over to reduce pore size. See next Sheet for
specifications. and the Narrative or Eros�m Control Manual for
additional details.
GC 10. GRASS -LINED CHANNELS .
Practice 6.30
All collection ditches to be graded to design
configuration, seeded, and stabilized if necessary with
temporary straw -net liners to collect and convey site
BENCHMARK LOCATIONS AND ELEVATIONS
LOCATION:
ELEVATION
1
ECM 0 INTERSECTION ALBEMARLE RD &
MORNING GLORY CT AS SHOWN
35.58
water as shown on Plan. After final project
stabilization, ditches to be re -graded and cleaned of r NOTE WELL:
siltation as needed to establish original contours for EROSION CONTROL DETAILS AND SPECIFICA77ONS ARE AS PER THE EROSION
stormwater conveyance. AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL" OF 774E STATE OF
NORTH CAROLINA. DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES,
LATEST ED1770N. PRACTICE NUMBERS REFER TO THIS MANUAL
RP 11. ROdC PIPE INLET PROTECTION
Practice 6.55.1 .
LEGEND
WETLANDS W w W W W y
® IRON IN EXIST. CONC. MON.
UE
CONSTRUCTION ENTRANCE
'1116- - - EXISTING SANITARY
TYPICAL
SEWER & MANHOLE
■ ■ ■ ■ OMITS OF DISTURBANCE
-- . --- EXIS77NG WATERLINE ..
(PROPOSED)
E.I.P. = EXIS77NG IRON PIPE
SF.
X SILT FENCE (NEW)
E.I.R. EXISTING IRON REBAR
TYPICAL
E.C.M. = EXIS77NG CONCRETE MONUMENT .
.
IP
INLET PROTECTION TYPICAL >
1' = IRON .SET S.
W/V = WATER VALVE .
.
W/M =WATER METER
OP
o
OUTLET PROTECTION (TYPICAL)
= R YDRANT E H FI E H
PIP = POWER POLE
_
- POINT C.P COMPUTED
GC
O
GRASSED CONVEYANCE CHANNEL
0\H = .: OVERHEAD POWER LINE
.
INV. = INVERT I _
G\W = . GUY WiRE .
B
BAFFLES (TYPICAL)
C 0 = SEWER CLEAN OUT
INDICATES SPOT ELEV
ATION +.49.0
NOTE: SEE
SHEET FOR CONSTRUCTION DETAILS
. . .. ...
RP
Roar PIPE INLET PROTEC71ON
INDEX TO DRAWINGS
SHEET No
DESCRIPTION
DRAWING No.
1 .OF `6. ..,
COVER. SHEET and GENERAL NOTES
f0010=ECP1
2. OF`6`--:
Site Plan: Pond No.
100f0-ECP2
3 OF 6
Site Plan'Pond No.2
10010-ECP3
- 4 OF 6
Pond Plans:.. & Profiles: and Details.
10010-ECP4
,6' OF 6
Drainage Areas and Impervious Areas Maps
10010-ECP5
6.OF 6
Erosion and Sediment Control Specificotions & Details
` 10010-ECP6
3
Minor revisions as per NCDENR DWQ comments
11-16-12
2
Ma)or storm sewer revision as per NCDOT, no pond revisions
10-25-12
1
Revised as per NHC comments. Stormwater ell: Erosion Control
10-10-12
REV. NO.
I REVISIONS
iL4
Copyright p, Hanover Design Servka; P.A., AN rights reserved. Reproduction or use or the contents of this document, or additions or deletions to this
. , document, in whole or part. without written consent of the Land Surveyor or £ngi eor, to prahbited. Only copies from the orlgind of this document,
marked with the original signature and original seal of the Surveyor or Engineer, snail be considered to be valid and true copies.
NOTE WELL:
1. All storm water runoff, from built upon areas
(i.e. Impervious surfaces) to be directed to the
storm sewer collection system (i.e. storm inlets
or pond foreboys) by swoles, overland flow,
additional grading, or landscaping inlets.
Bl ■
I ,.
CONSTRUCTION SCHEDULE.-
SEE
PLAN THIS SHEET and ADDITIONAL DETAILS ON SHEET 6
1.
Obtain approval of Plan and any necessary permits, and hold a
pre -construction conference prior to commencing any work.
2.
Flag work limits and -stake -out parking lot,, primary measures, and
11
Silt Fencing and Sediment Basin for preliminary grading.
3.
Install Gravel Construction Entrances.
4.
Install Silt Fencing as shown on Plan prior to clearing and .
grubbing site. Sediment Basin to be constructed prior to building.
5.
Install utilities In roadway and drives, establish final grades and
stabilize parking areas. and roadways with stone base course.
6.
Final grade building sites, Install non municipal utilities as
-
needed, and vegetatively stabilize areas where building
-.
� �
construction is not Imminent.
-
7.
All erosion and sediment control Practices are to be Inspected
v
� � 0'
-
n rainfall. n repaired as nocesso .
waeki and after a ran i and
P rY Y Y
?_
8.
Upon completion of building construction, the roadway and _ �
to
�
� ca-- .,
parking areas are be paved and all areas permanently a
stabilization, temporary'
_
�-
vegetatively stabilized. .After site - C- v
measures are to be removed and the Sediment Basin cleaned to
A
L) -,:'-
its original design contours, if necessary, and riser ,?
-
Z
r a ned so as to function as a stormwater
structures o if ces ape
t �
e_
LLt
O
management / water quality retention pond. "
�
AIN NAN E P
M TE C PLAN--
CD _
O
t,
1.
All measures to be Inspected weekly and after any rainfall
-
-�
Z -
>
event and needed repairs made Immediately. .
J
2.
Sediment Basin to becleaned out when the level of sediment
reaches as shown` on individual pond plans. : '
3.
Construction entrance to be maintained We condition to prevent .
mud or sediment from leaving the construction site. Periodic
topdressing with 2'stone may be required. Remove. all objectionable
material spilled, washed, or tracked onto public roadways Immediately.
4.
Sediment to be removed. from behind the any Silt Fence and
Inlet protection devices when it becomes 0.5 deep. Fencing
and inlet protection to be repaired as needed to maintain a
barrier.
5.
All seeded areas shall be fertilized, mulched, and re -seeded
asnecessary.according tospecifications provided. to
maintain a suitable vegetative cover.
8.
- structures week) and after significant 1 2 inch
Inspect r ra outlet at
P rip -rap Y 9n ( /
or greater) rainfall events to see if any' erosion around' or below rip -rap
has taken place, or if stones have been dislodged. Immediately make
all needed repairs to prevent further damage.
7.
Inspect baffles at least once a week and after each rainfall. Make any
required repairs immediately, ,
8.
Skimmer to be inspected weekly and after each significant rain event
(i/2 Inch or greater) and repaired immediately. Make sure that the
skimmer does not become entangled In basin vegetation or trapped in
silt due to low water conditions. .
Erosion` & Sediment Control and Water Quality Plans Cover, Sheet
i ion
Wi1CJf1ower Subcfi- s
Cover Sheet and General Notes
� HARNETT TOWNSHIP NEW HANOVER COUNTY. NORTH CAROLINA-
`-.���4tN CARp(�'•e,,,OWNER: WFDC, LLC �- g .
• '- ^ ..
eN
•`°�.•44F5S1(j .'� �'•. PO 80X 3649..P.
.•6� 910-1762O2676C 28406 jO��11
. ; SEAL
's ; 20007 4
° .�{ �� V N, HANOVER DESIGN SERVICES, RA.
ey/
' 0 J LAND SURVEYORS, ENGINEERS & LAND PLANNERS
1123 FLORAL PARKWAY
f r. iC 2 • t e, WILMINGTON, N.C. 28403
dhollis @ hdsilrn com -- PHONE: [phone] LICENSE No. :C-0597
9-15-12
Scale:
1 "= 80'
Drown:
DSH
Checked:
GA W
Project No:
10010-ESC1
Sheet No:
1
Of: 6

/ DETAILS SHOWN ARE TYPICAL OF INSTALLATIONS
/ V REQUIRED BY NEW HANOVER COUNTY. WELDED REBAR
TRASH GRATES, .. • • . • •.... • ..... • . ► .... .
/ THIS SHEET DOES NOT PURPORT TO SHOW ALL GALVANIZED 4- '
/ 4
/ J
REQUIRED CONSTRUCTION
DET AILS. BUT
RATHER BLAGUIDE THE CONTRA CTOR
IS RESPONSIBLE FOR ADHERING
TO
ALL
/ f LOCAL AND STATE CODES AND CONSTRUCTION
_
-: 55 INVERT OUT= 25.5 ,� ,.... - . r •. " • . T d-
NORMAL: WSEL- 2 . ,� � :, � 1 "" t ! 's r..- ,! ,���..� .: fir.
X.
+. :.. _ r t " .G. t SCALE IN FEET: 1 50
1 PIPE �..... r :...: r.. r t:: .. r. r
r r r. r / r r �!-/ r r
......... r r
r �_
................. y ! : rl c r. r i
:, �n uxnc �n.e ::"". F'n .l :. ;;": 1 . :'a ••�! % u ..../.... r: r �r i--f; —r_. _ A:' r
77)
3 .
Minor :revisionsas per NCDENR DWQ comments "
11-16-12
.2
Major -.:storm sewer revision as per NCDOT, no pond revisions:
10-25-12 "-
1
Revised as per. NHC comments,: Stormwater.. & Erosion Control
10-10-12
:''-REV. NO...
:.. REVISIONS
DATE..:.;
t:® No over.Desir Services P.A., Ae ruts reserved Reproduction or use of the contents of this document, or odditkns or deletions to this --
document h whole or part, without written consent of the Land Swwyor or Enpinse, Is prohibited Only eapka flan the oriy/nal of this doeumen6
morkad rRh Me arlp/nd sirature and orighd sed of ft Surveyor or EnpLnew. shalt be oaaldered to be wid and trw capbs
'�l tw1or fie �a�itiH�a taa is r�
,I ■ ■;Lit Sim ■Gil
e®6MIN N ®i�®
--=--
NOT • SCAiE

LOT 180 \\
DETAILS SHOWN ARE TYPICAL OF INSTALLATIONS
CRESTWOOD \ LOT 181 ` /%/ REQUIRED BY NEW HANOVER COUNTY.
\ \� / THIS SHEET DOES NOT PURPORT TO SHOW ALL
SECTION 10 \\ \ ^'' /��// REQUIRED CONSTRUCTION DETAILS, BUT
'7j RATHER SERVES AS A GUIDE. THE CONTRACTOR
IS RESPONSIBLE FOR ADHERING TO ALL
M. B . 18 PG. 119 \ a �� O[k j ����`�►/ S' F LOCAL AND STATE CODES AND CONSTRUCTION
STANDARDS.
nT 1 8? Nb
lWiGH
hV
N/>00or"
\
/-
RP L
- PIPE INLET PROTECTION DETAIL - \ _ - _ .._.-._ ROCK
- _ IP \ - LI ITS OF DISTURBANCE
k
looll
23
loll
_�,���/ 946836 :Sq. Fee
ABOVE WSEL 6'min. 12'min. SEE PLAN
ALL SLOPES
3:1 MAXIMUM —'
Forebay vo�ume
WSEL 20% of required
27.5 storage, typical
o�
'`� REMOVE
`a° 4'min. SED.=20:0
Forebay
ry. Bottom
Elev.=19.0
FOREBAY SECTION DETAIL
NOT TO SCALE
■IN 91111reAftr
- - - - - - - - - - - -
I
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1
��so•e�wra!a���)
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►®�Oiji!�6 �A
r
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•!4losese•isessl4
•sloe a eoe
•"•"i•e
!�o
ioyeoio• io
••^!
! • eoeo•o•oeo•osoe • •o•oe • •
e!!�•! e • • m •ems! i e •
s e s e •• s i e•! i• o
0
w Ln
ON I
O0 p f
OUTLET
PROTECTION
AS ON PLANS
FLEXIBLE
` 3
CONNECTOR HOSE
Q(100)b1dcked =10.6 dfs @ WSEL = 30.74 "
/ de
STATE STOP.AGE VOLUME
.24 v -1.4 s
401
.Af _ i1BT�STU R'B / " \ / BieMiaMNT 3z:o
♦ \ // \ �`i / / / 100-YEAR WSEL= 30.4 EMERGENCY SPILLWAY EL = 30.5 3
31 \ , o. Acsre� . ,+ . ,+ s ./ \ ,.. 39 All areas not in Lots or 1- A EL= 29 4 10-YEAR WSEL= 29.8 1 — — — — — c^v M
Y Note. A TOP OF BOX = 30.0 • { ,�
7 \ \ Rights of -way are Common Areas, STATE STORAGE ELE'
, ► ` \\\ _ and maintenance of Common Areas
/ I �\ ` ,► . ,+ / / , developer NORMAL WSEL=
30 \ \ , >r are the responsibility of the dev p -........
S r
/ Sand 1 or the HOA.
LL► \ �'.
ENT
-
/ :'�:�:�A�RA�1r::�'1RMAN
Q
................
................
o �� SF
l 1>...
I 2
.......................................................
P 2
O
J
/
N
\ �� 1g t 'SEDIMENT-0VAI:Et-E-VAT1ON=
.... ,� I �;.Tr S� I /.. > 26 25 24 23 22 21 20 '� ` �/ ,1 c 1' MINIMUM (BOTTOM EL=
... SF
I i / /
. � / ' - � _ y _ , NOS POND BOTTOM MAY BE
REN C E
_ / G�� OVEREXC) TED FOR
SEDIMENT STORAGE
:�N
1r\ I
ccC
.\ , See Sheet 4 for Profiles and Additional Details
l
1
3
Minor revisions as per NCDENR DWa comments
11-16-12
2
Major storm sewer revision as per NCDOT, no pond revisions
10-25-12
1
Revised as per NHC comments. Stormwater dt Erosion Control
10-10-12
REV. N0.
I REVISIONS
DATE
50 25 : 0 50
SCALE IN FEET. 1"= 50'
Erosion & Sediment Control and Water Quality Plans
Wildflower Subcdivision
Pond No.2 Project Area
HARNETT TOWNSHIP . NEW HANOVER COUNTY,: NORTH CAROLINA
Date:
915-12
Scale:
1 "= 50'
Drawn:
dSH
AR
_SE AG z .
Checked:
GA W
Project No:.
10010=ESC3

NOTE WELL: STORM WATER
POND IS TO BE LOCATED
W
WITHIN DEDICATED COMMON
POND No.1 CROSS SECTION DETAIL
Q
AREA and DRAINAGE EASEMENT.
COVE OVER
NOTTO SCALE
®
ONLY.
0
A PORTABLE PUMP
SEE PLAN VIEW
I Z
TO BE USED TO
3:1 SLOPE
DRAIN POND IN AN
27.5
EMERGENCY.
STO
N3»
3:1 SLOPE
25.5
25.0 STATE STORAGE ELEVATION = 26.5 AT WEIR CUT
-.--._.-.-.-.-.-.-.-.-.-._.-.-.-.-.-._.-.-.^.-.-.-.-.-._._._.-.
3:1 SLOPE
WEIR CUT 26.5 25.0
25.5
50
(' )
1THICK
I
ui
INS
24.5 24.5 40LF 18"RCP
26.0 FOREBAY :1 SLOPE 26.0 VEGETATION
MAIN POND No.1 3.1 SLOPE
1 SLOPE 2 1 SLOPE
10' VEGETATIVE
:SHELF (10:1 SLOPE) 10' VEGETATIVE
FROM ELEV. 25.0 TO 26.0 Ave = ) SHELF (10:1 : SLOPE)
1. = ELEV. 0
SEDIMENT � :SEDIMENT 2 _ F
_ - SA sf
Average Depth (volume/SA
=
FROM E 2
= - _
- volume 118.650 cf 5 0 TO 26
25,000
REMOVAL_ 19_0 _ .REMOVAL _21.0 4J'
POND - POND
BOTTOM 18.0 BOTTOM -20.0
SEDIMENT
_ -- REMOVAL= 14_0 --
POND
BOTTOM 113.0
Wildflower.:Subdivision Pond:No. 1
W1Idfiower Subdivision Pond No.1 Rv` 12 A P ee VOLUME_: REQUIRED .`R [(P)( j)( )/ ]( ): `
Wet detention/retention pond
STAGE .-:STORAGE-,TABLES:. .: PEAK DISCHARGE SUMMARY- SEE PAGES :.A.1 and A.2 "Cont ro l I i ng ,Urban Runof f .:
Additional Calculation Summary for NCDENR / DWQ
MAIN BODY OF POND--BUILD-OUT COND1'TION _.Q 1 -,pre-developed =-5.80 cfs A Practical :Monual�.for Planning ond:Desi'gning Urban..BMPs"
Above WSEL Q 2� pre- developed 5.80 cfs WATER QUALITY CONSIDERATIONS (P)= 1.5".
INCR. INCR. INCR Q 10) pre -developed = 7.94 cfs - _ ,
AREA VOL STORAGE:. Q 25) pre -developed = 9.25 cfs j
(P•) o s
ELEV. P P Impervious area calculations: See Project Data Sheet Rv)=.0.05 + 0.9(150,457/501522) 0.320
= 1.53 cfs ® WSEL 26.78
��. (ft) (sf) ;(cf). (cf) (ac-ft) Q(1) post -developed - - (
�. -- -� st-developed - .5 f ® WSEL = 26.78 TOTAL IMPERVIOUS = 50 457 f = 5010522) 0.461:acre feet:.
Q 2) po - 1 3 cfs s
.25.5 25 000 - - Q 10) post -developed 4.28 cfs @ WSEL = 27.09 TOTAL AREA RDRAINING ITO POND = 501,522 sf (11.51 acres)
)(0 320/12
=520 * 100 c f REQU I RED:,STORAGE
R [(1
26.5 319500 151375 29,125 0.67 Q(25) post -developed = 5.92 cfs ® WSEL = 27.27
28.0 35 000 34 ; 00 79 ,:250 1 .82 Q 100 os t-develo ed = 7.86 cfs ® WSEL = 27.55 29,125 cf PROV I DED: STORAGE ®`ELEV.= 26 5
0 ( )P P SA REQUIRED: 150,457 501,52?_ = 0.30, or 30%
DRAWDOWN:
30.0: 41;000 59;500 155,250 3.56 Q(100)post-BLOCKED = 0.00 cfs ® WSEL = 27.85 /
J - STATE WATER QUALITY POND CONSIDERATIONS - Average head from storage elevation to orifice -
STORAGE VOLUME @ ELEV 26.5 29.175 0.67 p / 26.5-25.5 3 0.33'
At 4.5' depth, 90% TSS removal, from chart - SA DA factor = 2.5 /
Surface Area required = 12,600 sf 501,522 x 0.01 x 2.5 = 12,600 sf SA REQUIRED 2". droin`.(2" orifice ..in 6"..PVC. Coo) to draw -down pond:
Surface Area provided = 25,000 cf ® WSEL 25.5 At Elev. = 25.5 25,000 sf SA PROVIDED Orifice equotion:.Q = CA(26h)^1/2..
Storage Volume required
= 20,100 cf T = 3.8 _ days
1 t :I ■7II.IVII.I:II:I/rrri'XCt!_/--- /?_i---T 6 err/ l Fffrx Stornne VnlumP nrnvirlAd = 99.195 of ® WSFI 98 5
_
/ y I Q WiIdfIower:Subd.ivls!on Pond.:No.2
,0 2 2, 20 o �U _ PEAK DISCHARGE SUMMARY -
2s z 24 23 2 , STAGE STORAGE TABLES
0 \ MAIN BODY OF POND - BUILD -OUT CONDITION Q 1 pre -developed = 5.99 cfs
Eft SPADE 2 pre -developed = 99 cts
3� 302s 2s Above WSEL. Q P P 5
/ `° Q 1.0 pre_ _ pre -developed loped 8.21 cfs
INCR. INCR.. INCR: Q 253 pre developed 9.56 cfs
'
ELEV. AREA VOL. STORAGE STORAGE
66, f�` Q(1) post -developed = 2.51 cfs ®WSEL = 29.39
Removal EI v. (ft) (sf) (cf). (cf} (ac-ft)
ottom El v. ,r � _ 2))post
-developed = .5 f = . 3
---
�•. Q(2 2 1 c s® WSEL 29 9
10 post -developed - 6.97 cfs ®WSEL - 29.79
Q ) P
27.5 16' 000
,r 40 40 01 av ,� � - Q(25) post -developed 9.96 cfs ® WSEL = 30.00
55L G SF 29.0 21 500 10563 29,875 0.69
.+ / 22,500 Q(100 post -developed = 11.76 cfs ® WSEL = 30.36
30.0 23;50.0 52;375 1.20
32.0 28:1000:: 26;750 103,625 2.38 Q(100�post-BLOCKED = 10.63 cfs ®WSEL = 30.74
boy f i STATE -WATER QUALITY. POND CONSIDERATIONS -
\STORAGE VOLUME 0 ELEV 29.0. 29,876 0.69 Surface Area required = 16,075 sf
\ s of �Side510
Pe S i� Surface Area provided = 16,500 cf ® WSEL 27.5
\ 'S. herf���e ve ,'•�`ae - Storage Volume required = 25,120 cf
,ae et6t65 / .
Stor V I 'd d - 29 875 f ®WSEL 29 0
ve ,a a e o umer WV
Storage Volume Drawdown Time = 3.9 days
SF BORING LOCATION.
- i GROUND EL= 28.8 /
SEDIMENTATION POND CONSIDERATIONS
NSID
EA TI
ON
5
EPTHDOWN TOSWT-0.
wTEL=z1 Storage required = 11.90 X 3600 42,840 cf
\:An Storage provided = 71.125 cf f
SF `� ���to5SeYGr�
G / AQUATIC. VEGETATION..
ZONE:
FROMEL27.0 T0. EL ,fir ��ee
28:0 ,i
MH
2
RAM Z� 1 •. -.
/ SUITABLE SPECIES FOR PLANTING iN
THIS;`:ZONE.ARE AS FOLLOWS: .. �.`�'�� •�t��,SSIQ�'", .`:
Wildflower Subdivision Pond No.2
Wet detention/retention pond
Additional Calculation Summary for NCDENR / DWQ
WATER QUALITY CONSIDERATIONS -
Impervious area calculations: See Project Data Sheet
TOTAL IMPERVIOUS = 194,452 sf
TOTAL AREA DRAINING TO POND = 518,540 sf (11.90 acres)
SA REQUIRED: 194452 / 518540 = 0.375, or 37.5%
At 4.3' depth, 90% TSS .removal, from chart - SA/DA factor = 3.1
518,5410 x 0.01 x 3.1 = 16,075 sf SA REQUIRED
At Elev. = 27.5 16,500 st SA PROVIDED
2
Minor revisions as per NCDENR DWQ comments
11-16-12
1
Revised as per NHC comments, Stormwater & Erosion Control
10-10-12
REV. NO.
REVISIONS
DATE.
VOLUME REQUIRED: R [.(P)(Pj)(Rv)/12](A)
SEE PAGES A.1 and Ar2;."Controll.ing.Urban :Runoff:
A Practical Monuol.for.Planning and Designing Urban BMPs"
(P)- 1.5"
(Pj)= 0.s
(Rv)= 0.05 + 0.9(194,452/518;540) = 0..3875
(A)= 518,540 sf
R= [(1.5)(0.3875/12](518,540) = 0.58 acre feet
= 25.120 cf REQUIRED STORAGE
29,875 cf PROVIDED STORAGE 0 ELEV.= 29.0.
DRAWDOWN:
Average head from storage elevation to orifice -
29.0-27.5 / 3 = 0.5'
2" drain (2" orifice in 6" PVC Cap) to draw -down pond:
Orifice equation:.0 = CA(2gh)"1/2
T. = 3.9 days
Dote:
9-15-12
' Scale:
1 " 40'.
Drown:
Checked
GA W
Project No:::>
10010-ESc4
• Sheet No.
ram: o •��`�i
�..,,. HANOVER DESIGN SERVICES, PA
"ND=SURW-YORS, ENGINEERS &LAND, PLANNERS 'T
119': 91 nR01 PARKWAY
20W7 �

:
" Wildflower Subdivision"
Drain'age'AreaNap
Scale: 1'= 100'
1P123 FLORA
L.
>
PARKWAY
WILMINON N.C.284
3.
....GT
HONU 910343 8002
LICENSE. C_0597
CONSTRUCT NEW CONTRACTOR MAY INSTALL
ORIFACE BUT MUST PLUG IT
WELDED BAR GRATE,
GALVANIZED, MNFCTR: TEMPORARILY DURING CONSTRUCTION. PLAN VIEW
OR EQUIVALENT J.W.FAIRCLOTH & SON. INC. ORIFACE TO BE OPENED ONLY AFTER
412—A BUTTONWOOD DRIVE ENTIRE SITE IS STABILIZED.
SECURELY BOLTED PO BOX 757
IN PLACE 16"1 HILLSBOROUGH, NC 27278 SEE SHEET 6 FOR SPECIFICS. CONSTRUCT` 3
www.fairclothakimmer.com cl-,C DI eh/ - vfc-w cna t ni^n rinnt GRATE TOP 1
3
Minor revisions as per NCDENR DWO comments
11-1$-12
2
Motor storm sewer- revision as per NCDOT
10-25-12
1
Revised as per NHC comments, . Stormwater & Erosion Control
10-10-12
REV. NO.
REVISIONS
DATE
L i I"1
L I
1
D
••� to S
Checked. H.
I
*.�'��(;;... �C/,� :,•� OWNER: .`.WFDC,, : LLC i
.`'C�_.•°LS41�1:!4"�'�i_ PO BOX 3649.. GAW
1123 FL` RA .PA W
' 0 L. RK AY:�
t Hanovar Dsa!
P.A M R the .. SPX O . yn Servke; rfghta roaanrod. eproductlon ar uas o/ cantenta o/ thb document. a additb�ofthlbs
r daletlons to }hb ..: - ... .. :.
■i .�— �.
.. _ aocumen HL v � WILMINGTON .' N:C. -28403 .
. ... -. ..... .. .. .- _. ..._ .. .. ... .. � ... � .. t. drole�or without .rltten consent o/ the Land Surveyor or En eer b bated t>n! /es from tM - lnddocumn t r Pam. 1Ar 9b Proh yaoP oA9 t, �i.� .. .:�-. ���.a��.�.�
.. .. .. maked- r!!h the lnal - ..... ure and d sed / Surveyor or n sh ,
➢o o the E as be cons/dero0 to fit wild and true /es arlytn wr pbeer, aaP PHONE:' 910 343-8002 LICENSE,
dhollls> ® hdsllm.com ... :. oF.:.
� ),

. DESIGNER'S PLAN CERTIFICATION:
"1 HEREBY CERTIFY THAT THIS PLAN HAS BEEN PREPARED IN ACCORDANCE WITH
THE LATEST NEW HANOVER C DINANCES AND STORMWATER DESIGN MANUAL."
51GNA
PRINTED NAME AND T)11_E: DAVID S. HOLUS, PE, PLS
DATE: .I,�J . C�
REGISTRATION NUMBER: PE #20007
PROPERTY OWNER CERTIFICATION:
"1 HEREBY CERTIFY THAT I AM THE CURRENT OWNER OF THE PROPERTY AND THAT
UPON RECEIPT OF "AUTHORIZATION-TO-CONSTRUCT'ANY CLEARING, GRADING, CONSTRUCTION
OR DEVELOPMENT, WILL BE PERFORMED IN ACCORDANCE WITH THIS PLAN AND THAT THE
APPLICABLE ORDINANCES AND RULES OF NEW HANOVER COUNTY, THE STATE OF NORTH .
CAROLINA AND THE FEDERAL GOVERNMENT AND ITS AGENCIES WHICH ARE HEREBY MADE
PART OF THIS PLAN. AS THE OWNER, I ACCEPT FULL RESPONSIBILITY FOR THE CONSTRUCTION
AND OPERATION AND MAINTENANCE OF THE PROPOSED FA ,nES. I WILL NOT ATTEMPT TO
TRANSFER THIS RESPONSIBIUIY WITHOUT THE WRI �A ORIZAl10N OF NEW HANOVER COUNTY
.. c NR P G
SIGNATUf� t
.
PRINTED NAME AND TITLE: William H. Cameron, Manager Member
Ar=1 E G I�IZ Pr�r � I LL(i
DATE: �t' CZ.
' P HARDWARE CLOTH & GRAVEL INLET PROTECTION (Temporary)
Specification # 6.51 - Construction Specifications
As fabric, use a 19-gauge hardware cloth with 1/4 inch mesh openings,
with c total height of 2 feet minimum. The sediment control stone, with
a height of 16 inches, should have on outside slope of 2:1.
For stakes, use steel T posts of 1.25 Ib/linear foot with a minimum
. length of 5 ft., driven 2 ft. into the ground, maximum spacing of 4 feet.
. Specifications
1. Uniformly grade a shallow depression approaching the inlet.
2. Delve 5-foot steel .posts 2 feet into the ground surrounding the Inlet.
Space posts evenly `around the perimeter of the inlet, a maximum
of , 4 feet apart.
. 3..Surround the posts with nitre mesh hardware cloth:.Secure the wire -
mesh to the steel posts at the top, middle, and bottom. Placing
a -2=foot anchoring flop of the mesh under the'grovel is recommended.
4. Place clean gravel (NCDOT #5 or #57 stone) on a 2:1 slope with a height
of 16 inches around the wire, and smooth to an even grade.
5. Once.the contributing;..drainage...area has been ,stabilized, remove the = , r
accumulated sediment, and establish final grades.
6. Compact the area properly and stabilize with groundcover. '
Maintenance ...
Inspect the barrier after each significant rain and make repairs at needed.
Sediment to be removed from behind the any inlet protection devices when it
becomes 0.5' deep.
Remove sediment from the area as necessary to provide adequate storage
volume for the next rain. Take care not to damage or undercut the hardware
cloth during sediment removal. . .
When the. contributing. drainage area' has been adequately stabilized, remove ail
materials and any unstable sediment and dispose of them properly. Bring the
disturbed area to the geode of the drop inlet and smooth and compact it.
Appropriately stabilize ail bare areas around the Inlet.
.. y
. ..
.. "
CD :
.: .: Check Dams. - _ - .
_
C
.
:, .. '.
Land Gradin
: :_
4
.. .. -. - ...._.. ::: -: � C ecifications
_ .. i ti ns .... - Specif on . # 6. - on Sp
6.83 .Construction ;Spec fco 0
icoti ' 02 Constru ti
.. .. , _. is riace scone io ine nnes.ana vimensions.snuwn ai the piun on a niter monc ..
v
._ � . . , - .. . . -': foundation. :-..P ... <: ::--. .-` -`..: . . - . � � � .
� measures in accordance with the a roved sedimentation contro) n an
PP d
_
2r. Keep the center `stone `section at aeast 9 inches `below natural ground level
construction schedule.
_.. ....
. _ . J hannel banks.... ..... . _ ,.
- where the dnm .abuts ,the .c
3 Extend stone at least 1.5'ft beyond the: hitch banks (Figure 6.83b) to keep
.
2.Re move good topsoil _from areas to be graded and filled, and preserve it for
overftowi Water from undercutting he; dam as" it ;re-enters the channel.
use in finishing the grading of all critical pleas.
' _' 4. Set-s odri . between -dams to. assure thdt.'the elevotion of the to 'of the lower . :
_... - P 9 P:
3.Scarify'areas to be topsoiled to o minimum depth of 2 inches before lcin .
P 9
. :.
.: - =edam is;:the'same-as the toe elevation of: theupper dam. -
topsoil (Practice 6.04, Topsoiling).
... - 5."Protect. the channel downstream.•frorn' the lowest check dam, considering that .
' ' :water=wili flow over and around `the dam practice'6.41 -Outlet Stabilization
{
4.C1ear and rub areas to be filled to remove trees ve etation roe or other
,
9 9 �'
Structure).
objectionable material that would affect the planned stability of the fill,
. 6.. Moke'sure that -the channel reach above the most' upstream dam is stable.
S.Ensure that fill material is free of brush, rubbish, rocks, logs, stumps,
-_.6.-Ensure that channel appurtenances; such..as.culvert entrances below check
building debris, and other materials inappropriate for constructing stable
- _. dams, arc not'subject to. damage or blockage from displaced stones.
falls. -
.
.
6.Place all fill in layers not to exceed 9 inches in thickness; and compact the
Maintenance ,. ..
- <: :...,_ ..
. . ... . _.
. ....
. other related
.. .
..
__ _.
` ' - Ins ect check:..dams "and :channels.:for-damage.;..after.'each runoff event..Anticipate : <.
. ,... P
.
glob
. . . . .:. -, ...
. - . - . � ;a r - -.
.. .... , submergence and:,,deposition above the check dam , - red a osion from high flows
-
7.Do not into orate frozen material or soft muck or hi hl tom ressible
rP Y, 9 Y P
_ Correct..all "demo a immedia ei" 1f i n Ica t :.
- - - -- - around the;_edges,cf;,the dam. g t y. sg if n
.
- :. materials. into fill slopes. .
_ .. _ . ... m in fall %a : rotective ri` ra liner in that ` ortion ::
. ... erosion occurs between_da s, s ;. p p p P . :.
.&Do not lace -fill on a -frozen foundation due to ossible subsidence and
.... of; a channel (Practice 6.31, Riprap_-lined :and Paved Channels).. Remove sediment . ...
-to -
.. .
..:sli PP°ge'
' - .. accumulated .behind the dams:ras needed to revent ;dame a channel Ve station, -- -
P 9 _ 9
c allow the channel to drain throw h the stone check''dam;- and prevent lar a flows "
9 9
w er
Keep di a conveyance measures free of sediment during
.:
.. _
tones :.to
- from carrying sediment over .the dam: Adds dams as needed ` to maintain
ell hoses of develo ment
R P
� ;::design. height and crosssectton
tO.Handle seeps or springs encountered during construction in accordance with
. .. _. .: % . .. ':
. . : .: ..
.
approved methods (Practice 6 81,. Subsurface Drain).
, ..: --:.: .-_ ...
.. .- , . .
. ....: .... _. ..... _
. _ .11.Permonentiy stabilize all graded areas immediately after final grading is
:
. completed on each area in the grading plan Apply temporary stabilization
-, - ...
..:. ...... .
. eas wo is to be ante ed or d d for
measures on dt graded ar when' rk ' rru t elo 30
P Ye
. . _ ..::.
working dogs or longer.
.... _...
. .::.. .. .. .
1 2 Ensure that topsoil stockpiles, borrow areas, anal spoil areas ore adequately
FLOW DIRECTION
protected from erosion with temporary and final stabilization measures, including
.. ` ... . CLA SS 1 OR B •' _
EROSION CONTROL
WASHED `STONE 1' I�
n m o ory n . ar :
sediment fence and to r seede recess
9 P 9 Y
-TrJlCK ON FACE STONE
Maintenance
FROM TOE OF DAM
TO WEiR. :
Periodically check all graded .areas .and. the supporting erosion and sedimentation
2 MAX
control practices,' especially after heavy rainfalls. Promptly remove oli
. FILTER . AT CENTER
sediment; from diversions, and: other water -disposal practices. If washouts or
FABRIC
breaks occur, repair them immediately. Prompt maintenance of small eroded areas
before they become significant gullies is an essential part of an effective
.. SECTION; A -A . .
... . , -
erosion and sedimentation control plan.
. ::
i
1.'
• • • e t•
•
wee6e�®_fs�..-s • efaeieb'
ej gejejrj0 j:j;'�ejejaje" tr
.e�e�e��®a eeee�e�e.
: -
embankment to remove trees,: vegetation, roots and other ob
-1i
. . .
-
. . - .
. . - . ..
,. -.
A
. .
DETAIL
. CHECK DAM - .
.. . .
. ..
- NOT'.`T0 SCALE ..
. B Baffles .: .
.. .
. - Specifications # 6.65 Construction Specifications .
1. Grade ..the basin so that .the bottom Is. level front to back and side to side.
. .
- 2 Install 'posts or saw `horses across the': width of the sediment basin (Practice
6.62, Sediment Fence) ..
hes,:spaced a maximum
.:
..
. _ 3. Steel posts should be :driven to :a depth of 24.mc
- -
. . `of 4 feet apart, _and installed up : the sides of the .basin as well. ,The: top of the
.
fabric should be: 6' inches' higher;t„an the:invert:bf the spillway {EI=22.0)
.
..
4. install` -at least :the" rows of baffles between the iWet`and outlet discharge
.. :
oint.`Basins less ahan -20' feet in'len'th may use 2 baffles.
.
rt Wire :or rape across .the top .of :the measure .
. 5. When;using posts add a suppo.
. _ .
to prevent sagging. -
. .. .
6. Wr-"
rial, like jute backed'`by tole material, 'over a sawhorse or
. _ :
p porous ma e
the"top wire.. ammer rebar'nto:the "sawhorse legs: for anchoring: The fabrio
.:
should have five'to.ten percent;openings.`in the weave Attach`fabric.ta a rope -
... . .
. a res� or staples -
. red a support structure with zip ;ties, wi
P.:
.. . 7. The bottom -end sides of the fabric should bir'rbh ored in a trench or lnned
with 8-inch erosion control matting staples.
8. Do not space Ahe fabric, .but use a continuous piece across the: basin.
Maintenance ......: .
1 t b ffl t I ` t A, and after each rainfall Make an re .•real
. 1.
nspec a es o . eas
. . .. repairs. immediately ..
. -
a ion h m actin under the i e hounche
. -
.
I with its found t wen co p g p p
_ Be sure to mamtam. access : to the baffles. Should. the: fabric of a baffle collapse,.. � . _ Place °minimum depth of 2ft of hand compacted backflli o
tear, or -decompose or:become ineffective, replace it promptly.
i ... I m J ... . . Vf� JIUG, 1 i rit.rtt_ ING
1! M4'SP
. MAXIMU AC
SB 'Sediment Basin .
Specifications # 6.61 - Construction Specifications
. 1.Site preparations -Gear, grub and strip topsoil from areas under U-.e
jectionable material.
Delay clearing the pod area until the dam is complete and then rerr•, ,e brush,
. trees and other objectionable materials to facilitate sediment cleanout.
Stockpile, all .topsoil or.soil containing organic matter for:use on the outer
shell of the embankment to facilitate vegetative establishment. Place temporary
sediment oontrol measures tielow the basin o§ needed.
2.Cut-off trench -Excavate a, cut-off trench along the centerline of the earth
fill embankment Cut the trench to stable soil material, but in no case make it
.
less than 2 ft deep. The cut-off.trench-must extend into both abutments to of
leash the elevation of the riser crest. , -Make the minimum bottom width wide
• enough to permit operation of excavation ::and .compaction equipment but in no case
less than 2 ft. Moke ,side. slopes of the trench no steeper than I.1. Compaction
requirements are the some as those for the embankment. Keep the trench dry
during backfiiling-and-compaction operations.
3.Embonkrnent-Take fill material from the approved areas shown on the plans. it
. should. be- clean mineral soil, free of roots, .woody vegetation, rocks and other
objectionable material-Scarify:areas on which fill is be placed before placing
.. fill. The fill material .must contain sufficient moisture so it can be formed by
. hand Into a ball without crumblin If water can be' s ueezed out of the ball, it
9 q
P fill materi I in 6 to 8- ch
is too wet for ro er .corn action.. lace . o in
. P P P.
n inuous la ers .over. the entire len th 'of the fill area end then com-act it.
cot Y 9 ..:
in r n' he' c ns i n. haulm e
Compaction may be obta ed by outs g t o trust o g quipment over
the .fill 96' that the entire surface -of each layer is traversed by at least one
wheel or: tread track of the heavy.equipment, or a compactor may be used.
n a n ' io 1 9. hi her th n the d s' het
.Construct: the embankme t t. a elevat n 0 g o e ign ght to
allow for settling, .
- ` Y I " ttach the 'riser to the barrel or barrel b to
4:Conduit spillways Secu e y a sue
: make o.°watertight structural connection. Secure ail connections between barrel
sections by .approved watertight assemblies. Place the barrel and riser on a
firm, smooth foundation of impervious soil. Do not use pervious material such
as sand, grovel, or crushed stone as bockfill around the pipe or anti -seep
collars. Place the fill material around the pipe spillway in 4-inch layers and
compact it under and around the pipe to at least the same density as the
adjacent embankment. Care must be taken not to raise the pipe from firm contact
s.
ver the pipe spillway
before crossing it with . construction equipment. Anchor the riser in place by
concrete or other satisfactory means to prevent flotation. In .no case should the
pipe conduit be installed by cutting a trench through the dam after the
embankment is complete.
5.Emergency:spillwey-Install. the emergency spillway in undisturbed sok The
achieverrient of planned elevations, grade, design width, and entrance and exit
channel . siopes ore' critical to the successful operation of emergency spillway,
6.Inlets-Discharge water. Into the basin in . a manner to prevent eros;on. Use
diversions with outlet protectlow to divert sediment -laden water to the upper
end :of the pool area to improver basin trap efficiency (References:. Runoff
. Control Measures and Outlet Protection),
7.Erosion control -Constrict -:the: structure: so thatthe-disturbed area is . . .
. minimized. Divert surface water 'away from bare areas. Complete the embankment
before the`area is cleared. Stabilize the -emergency spillway embankment and all
other -disturbed oreas above the crest of the principal spillway immediately
after construction (References: Surface Stabilization).
8.Safety-Sediment basins may attract children and can be dangerous. Avoid steep
side slopes; and fence and mark basins with warning signs if trespassing is
likely. Follow ail state and local requirements.
. Maintenance -
Check sediment basins after, periods of significant runoff... Remove sedanent end
>restore the basin..to its original -dimensions when sediment accumulates to one-
half the `design depth..
. Check the embankment, spillways, and outlet for .erosion damage, and Inspect the
embankment. for piping and settlement. Make ail necessary repairs immediately.
Remove oll trash : and . other debris from the riser and pool area.
Table 6,11s - Seeding No. 4CP for.
Well -Drained Sandy learns to Dry Sands, Coastal Plain; Low to Medium -Care Lawns
Seeding mixture -
Species.- Centipedegrass - Rate - 10-20 ib/ocre (seed) or 33 bu/acre (sprigs)
Seeding dates - Mar. - June, (Sprigging can be done through July where water is
available for irrigation.)
Soil amendments - Apply lime and fertilizer according to sob test, or apply 300
Ib/ocre 10-10-10. ..
Sprigging - Plant sprigs in furrows with a tractor -drown transplanter, or
broadcast by hand.
Furrows should be 4-6 inches deep and 2ft apart. Place sprigs about 2 ft. apart
in the row with one end at or above ground level (Figure 6.11d).
Broadcast at rates shown above, and press sprigs into the top 1 1/2 inches of
soil with a disk set straight so that sprigs ore not brought back toward the
surface.
Mulch - Do not mulch .
Maintenance Fertilize very sparingly- 20 ib/acre nitrogen in spring with no
phosphorus. Centipedegrass cannot tolerate high pH or excess fertilizer.
Table 6.11t - Seeding No. 5CP for Well -Drained Sandy Learns to Dry Sands; Low
Maintenance
Seeding mixture
Species Rate (ib/acre)
Pensacola Bahlogross 50
Sericea lespedeza 30
Common Bermudogross 10
German millet 10
Seeding notes
1. Where a neat appearance is desired, omit sericea
2. Use common Bermudogross only on isolated sites where it cannot become a pest.
Bermudagross may be replaced with 5 ib/acre centipedgross.
Seeding dates - Apr. 1 July 15
Soil amendments - Apply lime and fertilizer according to soil tests, or apply
3,000 ib/ocre ground agricultural limestone and 500 Ib/ocre 10-10-10 fertilizer.
Mulch
Apply 4,000 Ib/acre grain straw or equivalent cover of another suitable mulch.
Anchor by tacking with asphalt, roving and netting or by crimping with a mulch
anchoring tool. A disk with blades set nearly straight can be used as a mulch
anchoring tool,
Maintenance - Refertilize the following Apr. with 50 Ib/acre nitrogen. Repeat
as growth requires. May be moved only once a year. Where a neat appearance is
desired, omit sericea and now as often as needed.
Table 6.11v - Seeding No. 7CP for: Grass -lined Channels; Coastal Plain
Seeding Mixture
Species - Common Bermudogross - Rote - 40-80 (1/2 Ib/1,000 ft )
Seeding dates - Coastal Plain; Apr - July
Soil amendments Apply lime and fertilizer according to soil tests, or apply
3,000 Ib/acre ground agricultural limestone and 500 Ib/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/ocre groin straw
and anchor straw by stapling netting over the top.
Mulch and anchoring materia_is must be allowed to wash down slopes where they con
clog drainage devices.
Maintenance -A minimum of 3 weeks is required for establishment. Inspect and
repair mulch frequently. Refertilize the following Apr. with 50 Ib/ocre
nitrogen.
Refer to Appendix 8.02 for botanical names J
J
Sediment Fence (Silt Fencel
Specification 6.62 - Construction Specifications SI-
MATERIALS
1.Use a synthetic filter fabric or a pervious sheet of polypropylene, nylon,
polyester, or polyethylene yarn, which is certified by the manufacturer or
supplier as conforming to the requirements shown in Table 6.62b. 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 120 F.
2.Ensure that posts for sediment fences ore
1.33 Ib/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 gouge and a maximum mesh spacing of 6 inches.
Table 6.62b
Specifications For Sediment Fence Fabric
Physical Property Requirements
Filtering Efficiency 85% (mm)
Tensile Strength at Standard -Strength- 30 ib/lin in (min)
- Extra Strength- 50 Ib/lin in (mm)
Slurry Flow Rate - 0.3 gol/eq ft/min (min)
CONSTRUCTION
1.Construct m r'
the Seale ent bar ter of standard strength or extra 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 f bri fr m
a c o a continuous roll cut to the length of the
barrier 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
up slope 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.
5.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
. ... inches.
6.Extra strength filter fabric with Eft post spacing does not require wire mesh
support fence. Staple or wire the fitter fabric directly to posts.
7.Excavote a trench approximately 4 inches wide and 8 inches deep along the
proposed line of osts and u slo a from the barrier fi ure 6.620 .
P P P (9 )
8.Backflll the trench with compacted soil or gravel placed over the filter
fabric. '
9.Do not attach filter fabric to existin trees.
9
Maintenance
Ins ect sediment fences at least one w k
p c o ee and after each rainfall. Make any
required repairs immediately.
Should the fabric of a sediment fence collapse, tear, decompose or become
ineffective, replace it promptly. Replace burlap every 60 days.
Sediment to be removed from behind the any Silt Fence when it becomes 0.5' deep.
Remove sediment deposits as necessary to provide adequate storage volume for the
next rain and to reduce pressure on the fence. Take core to avoid undermining
the fence during cleanout.
Remove ail fencing materials and unstable sediment deposits and bring the area
to grade and stabilize It after the contributing drainage area has been properly
stabilized. - .
Permanent Seeding
Specifications # 6.11 - Specifications
Seedbed Requirements
Establishment of vegetation should not be attempted on sites that are unsuitable
due to inappropriate soil texture (Table 6.11a), 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
requirements as a growth medium. The existing sob should have these criteria:
- Enough fine-grained (slit and clay) material to maintain adequate
moisture and nutrient supply (available water capacity of at least .05
inches water to I inch of sob).
- Sufficient pore space to permit root penetration.
- Sufficient depth of soil to provide an adequate root zone. The depth to rock
or impermeable ►ayers 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 -Le., if the existing soil Is too
coarse, dense, shallow or acidic to foster vegetotion-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 .
following material 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).
Peet -Appropriate types are sphagnum moss peat, hypnum moss peat, reedsedge peat,
or peat humus, all from fresh-woter sources. Peat should be shredded and
conditioned' in storage piles for at least 6 months after excavation.
Sand -clean and free of toxic materials
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 Ib. 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
re ulations.
9
Species Selection .
Use the key to Permanent Seeding Mixtures (Table 6.ttb) to select. the most
appropriate seeding mixture based on the general site 'and maintenance factors. .
A listing of species, including scientific names and charocteristics, 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 sob tests. Soil testing is .
performed free of charge by the North Carolina Department of Agriculture soil
testing 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
commercial laboratories.
When soil test are not available, follow rates suggested on the individual
specification sheet for the seeding mix chosen (Tables 6.11c through 6.11v).
Applications rates usually fall into the following ranges:
- Ground agricultural limestone
Light -textured, sandy soils; 1-1 1/2 tons/acre
Heavy textured, clayey soils 2-3 tons/acre
- Fertilizer:
Grosses 800-1200 ib/acre of 10-10-10 (or the equivalent)
Grass -legume mixtures: 800-1200 Ib/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 (slope less than 3:1) FBI in or level depressions than
con collect water. Broadcast seed into a freshly loosened seedbed that has not
been sealed by rainfall.
OP
Outlet Stabilization Structure
Specification # 6.41 - Construction Specifications
1. Ensure that the subgrade for the filter and riprap follows the required lines
r e h wn in h I n m :ct an fill r uired in the sub rode to
and gad s s o t o pa . Co p y eq g
the density of the surrounding undisturbed material. Low areas in the
subgrade on undisturbed soil may also be filled by Increasing the riprop
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. Ail connecting joints should overlap a minimum of I ft If
the damage is extensive, replace the entire filter cloth.
4. Riprop may be placed by equipment, but take care to ovoid damaging the
filter.
5. The minimum thickness of the riprop 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.
6. Construct the apron on zero grade with .no overfall at the end. Make the top
of the riprop at the downstream end level with the receiving area or slightly
below it.
h r 1 w h r ceivin stream and
8. Ensure that t o ap on s properly aligned nth t o e g
preferably straight throughout its length. if a curve is needed to fit site
conditions, place it in the upper section of the apron.
9. Immediately after construction, stabilize all disturbed areas with vegetation
(Practice 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 riprop has token place or if stones have been dislodged.
Immediately make all needed repairs to prevent further damage.
NOTE WELL• ..
1) OU7LET PROTECTION & 2) SLOPE IS FLAT (0%)
P
ROCK STABILIZATION APRONS FOR A MINIMUM OF 2LF
8
Rock to top of pipe
both sides
REQUIRED AS SHOWN ON PLAN. 2' MiN. BOTTOM WD7H.
W
J SLOPE
1 La-15' FLARED END
N
m
fj EMBANKMENT
_.
I -
lo°°°°
SECTION TYPICAL
'
OUTLET PIPE
d50=3"
o°o°o�°
18" & 36" RCPs
See Narrative for
10'
Apron=1'
o°o°o°
00000° °
additional details
O°a°°
-
p
2'min.
MINIMUM OUTLET TO & FROM POND
BE PLACED U DERRIALL STONE
DIMENSIONS 6 cyt EACH
OUTLET PROTECTION.
USE NICOLON MIRAFl 60OX
OUTLET PROTECTION and
POLYPROPYLENE, OR EQUIVALENT .
ROCK STABILIZATION APRON OP OUTLET PROTECTION - SIDE VIEW
NOT -TO SCALE -
NTS
REV. NO. REVISIONS . DATE
Ccpyright p, Hanover Design Servkex P.A.. All rights reserved Reproduction or u» of the contents of this document, or additions or deletions to this
document, in whole or part without written consent of the Land Survaier or £ngkieer, to prohibited. Only eophm earn the aNglnd of this document
marked with the original signature and orlgind sed of Ns Surveyor or £nginee, shall be considered to be valid and true oopiea
CC Temporary Grovel Construction Entrance/Exit
G Specification sl 6.06 - Construction Specifications
1. Clear the entrance and exit area of all vegetation, roots and other
objectionable 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 pod in a condition to prevent mud or sediment from leaving
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.
Temporary Seeding . :
Specification # 6.10 Specifications
Complete grading before preparing seedbeds and install all necessary erosion
::control practices, such as dikes,:waterwaysland basins. Minimize steep slopes
because they make seedbed 'preparation: difficult and . increase the erosion hazard.
If soils become compacted during grading, loosen them to o 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 the pH (acidity)
of the soil is not' known. ono lication of " round. o ricultural limestone' at the
PP 9 9
rate of 1 to 1 1/2 tons/acre on coarse -textured soils and 2-3 tons/acres on
fine -textured soils is usually sufficient. Apply limestone uniformly and
incorporate into . the top 4-6 inches of sob. 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 Ib./ocre.. Both fertilizer and
lim should be into Grated into the to 4-6 inches of soil. If a h raulic
e
rp p yd
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 . .
. surface, additional roughening may not' be required except to break up large
clods.: If rainfall causes the. surface'to` become sealed or`crusted.: loosen it
st rior to seedin ` b diskin rakin . harrowin : or other suitable methods
N P 9 Y 9, 9 9 .
Groove or furrow slopes steeper than 3:1 on the contour before seeding (Practice
6:03. Surface Roughening). . .
Plant Selection
Select 'on appropriate species or species mixture from Table 6.10a, for seeding
in late winter and early. spring, Table 6.10b for summer, and Table 6.1Oc for
fall... .. .
Seeding : . . .
venl seed usin a c lone seeder broadcast drill cuiti ocker r
E y apply g yc ( ), p seede ,
or h roseeder. Use seedin rates iven in Table 6.10o-6.16c. Broadcast seedin
. Yd 9 9 9
and hyroseeding are appropriate for steep slopes where equipment cannot be
driven and broadcastin is not recommended because of the difficult in
• H 9 Y
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 o roller or : .
ul i acker. H droseeded mixtures should Include a wood fiber cellulose h
c t mulc .
P Y ( ) .
Ir 'n . . .
The use of appropriate mulch will: help ensure establishment under normal
conditions and is essential 'to seeding success under harsh site condition
(Practice 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(shollow, 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).
Table 6.10a - Temporary Seeding Recommendation for Late Winter and Early Spring
Seeding mixture
Species- Rye(groin), Annual lespedeza (Kobe in Piedmont and Coastal Plain
Rate (lb/acre)- 120
Omit annual lespedeza when duration of temporary cover Is not to extend beyond
June
Seeding dates -Coastal Plain - Dec. 1 , Apr. _ 15.
Soil amendments- Follow recommendations of soil tests or apply 2,000 Ib/acre
ground agricultural .limestone and 750 Ib/ocre 10-10-10 fertilizer.
Mulch -Apply 4,000Ib/acre strow. 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 rowth is not full ado uate. Reseed refertilize
9 Y q
and mulch immediately following erosion or other damage.
Table 6.10b - Temporary Seeding Recommendations for Summer
Seeding mixture
Species -German millet .
Rate(ib/ocre) 40 . .
Seeding dates-Coostal Plain- Apra 15-Aug.. 15
oil amendments -Follow rec mmendations of sob t is or 1 �
S o es Opp y 2,oD0 Ib/acre
ground agricultural limestone and 750 Ib/acre 10-10-10 fertilizer.
Mulch -Apply 4,000 Ib/acre strow. 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 rowth is not full ode uote. Reseed ref tilize
9 Y. q a
and mulch immediately following erosion or other. damage. .
Table 6.10c - Tem oral Seedin Recommendation for ail
P Y 9 F
Seeding mixture
Species-Rye(grain) .
Rate(lb/acre) - 120 .
Seeding dates - Coastal Plain and Piedmont -Aug 15 - Dec. 30
Soil amendments - Follow soil tests or apply 2,000 Ib./ocre ground agriculturel
limestone and 1,000 Ib/acre 10-10-10 fertilizer.
Mulch- Apply 4,000 Ib/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- R air and refertilize damn a ar o Imm i
ep g d e s ed ately. Topdress with 50
Ib/acre of nitrogen in March, if it is necessary to extend temporary cover
beyond June 15. overseed with 50 Ib/acre Kobe (Piedmont and Coastal Plain)
Storm Water and Erosion & Sediment . Control Details and Notes
Wilcdfilower Subdivision
Specifications & Details
HARNETT TOWNSHIP NEW HANOVER COUNTY, NORTH CAROLiNA
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OWNER: WFDC, LLC _ � -
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WILMiNGTON, NC 28406 = �, if a n - Protect No:
910-762-2676 r 1 6 LUI-
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�ANOVER DESIGN SERVICES, RA. . Sheet '
LAND SURVEYORS, ENGINEERS & LAND PLANNERS . 6
1123 FLORAL. PARKWAY .
WILMINGTON, N.C. 28403
PHONE: [phone] LICENSE No..: C-0597 : . Of• 6
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DETAIL SHOWING TYPICAL. LOCATION OF'WHEELCHAIR
RAMPS.'PEDESTRIAN,CROSSWALKS'AND STOP LINES
OETAIL SHOWING TYPICAL.LOCATION'0 EL"CHAIR'RAMPS
PEDESTRiA CROSSWALKS ANDiS�QF LINES'FO�TEE INTERSE ONS ALLOWABLE LOCATIONS
DUAL RAMP RADII ..x..ANY.
DIAGONAL RAMP RADII .MAX-. 93!
0ROP06ED WHEELgM1R RAMP
(DIAGONAL RAMP IS NOT
PROPOSED OR•FUTURE SIDEWALK PERYIS$Ir E R. NEW,.CONSTRMION)
28' NTH SIDEWALK OPT100r-
s::®ssrori ®®io i
SIDEWALK
GRASSED AREA
ALBEMARLE ROAD
Station
Elevation
VertCurve
SightDlst
K-Value
Distance
Slope Type
Description
2+50. 00
34.33
122.57
1820.72
324.50
62.28
-1. 30%
PV I
4+48.50
31.00
75.00
581.86
33.51
198.50
-1.68%
PVI
6+27. 00
32.00
150. 00
694.79
139.89
178.50
0. 56%
PV I
8+22. 30
31.00
150.00
1321. 27
74. 41
195.30
-0. 51 %
PV I
10+75. 00
34.80
200. 00
445.. 90
104. 10
252. 70
1. 50%
PV I
13+14.50
33.80
50.00
1000:00
66.75
239.50
-0.42%
PVI
14+05. 00
34. 10
50.00
471, 21
33. 57 -
90. 50
0. 33%
PV I
0
33 00
25 _ 00
464 Of-11
16
95 00'
-1 16%
PVT
15+00. 0
15+46. 19
33.50
25. 00
292,` 82
10,54
46. 19 -
1. OS%
PV I
15+85. 00
.33. 00.
MOO
1000: 00
14. 59 _
38. 81 .
-1. 297
PV I
17+26. 00
33..60
150. 00
528. 47
102.35 :.
141.00
0. 43%
PV I
18451. 00
-32: 30
:50. 00
1000: 00
31..74 .
125. 00
-1. 04%
PV I
19+25. 71
32.' 70
25. 00
574. 04
' 21. 12::
74: 71
0. 54%
PV I
19+72, 00
32.40
46+. 29 .
-0. 65%
STURBRIDGE
COURT
Station
Elevation VertCurve
SightDist:K-Value
Distance
Slope Type
Description'.
0+94. 00
33.70
..24..00
-0. 58% .
2+50. 00
33..15
25. 00
1000. 00
25. 16 `
. " 156,00 :.
-0. 35Y .
PVI .
2+99. 09
33.47
20. 00
.336.60
9.83
49.09
0.647 .
PV I
3+30. 00
33.04
25.00
1000.00 .
14. -49 ,
30. 91
-1. 39%
PV I
4+55. 00
. 33. 46
150.00 .
1024. 61
214.: 33
125. 00
0.. 33%
PV I
5+80. 00
33.00
100.00
1000.00
97.26.
125. 00
-0. 37%
PV I
7+20.00
33.93
140.00
0.66%
CURVE
RADIUS
ARC LENGTH
CHORD - LENGTH
CHORD BEARING
DELTA ANGLE
C1
311.77'
181.63'
179.07'
S 57'42'04" W.
33'22'42"
C2
230.00'
396.27'
349.03'
N 55'02'41 " W
98'43'56"
C3 .
230.00'
171.43'
167.49'
N 27.01 '36" W
42'42' 18"
C4
230.00' j
80.20'
79.79'
S 46'47'55" E
19'58'41"
C5
230.00'
1 314.84'
290.83'
N 87'35'40" W
1 78.25'49'
TYPICAL OFFSET CUL-DE-SAC
ADDITI❑NAL NCD❑T NOTES:
1. FIRE HYDRANTS T❑.BE.18' FR❑M.THE.:.R/W MAXIMUM.
2. THERE SHALL BE N❑ ENCUMBERANCES WITHIN THE NCD❑T
RIGHT-❑F-WAY.
3. ONLY NCD❑T APPROVED -MATERIALS ARE TO BE USED
WITHIN THE RIGHT-OF-WAY.
4. ALL STEEL .AND IR❑N.PR❑DUCTS :WHICH ARE PERMANENTLY
INC❑RP❑RATED INT❑ THIS PR❑JECT.SHALL BE PRODUCED
IN THE UNITED STATES.
5. ALL DRAINAGE EASEMENTS` CARRYING ROADWAY ST❑RMWATER
AND:ST❑RMWATER.P❑NDS ARE TOBE DESIGNATED 'PUBLIC
DRAINAGE EASEMENTS'.
NOTES,' -
a 1.. CONSTRUCT. THE -WALKING SURFACE WITH SLIP'RESI,BTANTANCE AND A OONTRABTINO OOLQR TO THE SIDEWALK,.
CO- 2. CROSSWALK WIDTHS AND CONFIGURATION VARY BUT MUST CONFORM TG TRAFFIC.:DESIGH BTANPAR.DS.
3, NORTI# CAROLINA GENERAL -STATUTE 138-44.14 REQUIRES THAT ALL STREET CURB$ BEING CONSTAiOM-OR RECONSTRUCTED FOR YAINTENANGE
PROCEDURES TRAFFIC OPERATIONS,, REPAIRS CORRECTION OP UTILTIES OR,ALTERED FOR ANY REASON AFTER'SEPTEMBER '1, 't073',SiALL.
PROVIDE RELCHAIR RAMPS FOR -THE PHYSICALLY OISABLEprAT ID _4
THERE BOTH.CYRB AND BUTTER AND•SIDEWALK& ARE,
PROVIDED AND: AT' OTHER POINTS= OF .PEDESTRIAN 1LOW.:
ra
IN ADDITION SECTIC►N 22S OF TI 11)T9 FEDERAL AID HIGHWAY SAFETY AOT. REOt)IRE9 PROVISION OF' CURB AAMP.$ DN ANY CURB -CONSTRUCTION
AFTER:JULY �,1878 WHETHER. A BIDEWALIc IB PROPOSED INITIALED :OR IS FLAMED: FAR- A FUTURE. DATE.
4.. PROVIDE WHEELCHAIR RAMPS AT ,LOCATIONS AS SHOWN ON THE PLAN$'OR AS DIRECTED BY'THE ENGINEER:-. LOCATE WHEELCNIKIR RAMPS
AS ,DIRECTED BY THE ENGINEER -WHERE EXISTING tim PCLEB FIRE HYDRANTS, PROP: INLETS, ETC" AFFECT PLACEMENT ., WHERE
TWO RAMPS ARE"INSTALLEQ PLACE NOT LESS THAN -2 FEET OF hLL HEIQHT•CUAB. BETWEEN THE. RAMPS.. PLACE -.DUAL )IAMPS
AS NEAR. PERPENDICULAR 10 THE: TRAVEL LANE BEING CROSSED AS POSSIBLE..
5. PAY FOR ALL: VARIABLE DEPTH CONCRETE USED FOR; tXiF{STRUCTIOII bF' WHEELCHAIR RAMPS AS CONCRETE IAHEELCHAZR RAMPS. (S0• YOS
m .
z 6, PAY FOR ALL DEPRESSED. CURBS" A7 WHEEL'CHAIR:'RA.UPS AS THE `TYPE' CURB BIND GUTTER, VOW, ABOACENT W,DEPRESSED 010" (LN.:FT.)
1rl T,.. SUCH PRICES AND PAYMENTS IS C NSIDERED��FULL:COMPENSATION FOR ALL `MATERIALS* :LABOR ,-E)IPMENT; TOOLS ANp ItNIDENTALE;
S NECESSAR6 Y TO.BA728FAOTORILY COMPLETE THE WORK
Rmi to e. DO NOT EXCEED 0.08 (12 1) SLOPE ON THE WHggL*WR RAND .IH RELATZOhISHIP TD THE GRADE OF THE STREET
C 8:. CONSTRUCT THEELCHAIR RA1aPS 40 (9�`4M1 AR GREATER FOR'DUAL RAMP$ AND 80" (5`•O"T DR tlREATER FOR ;OIAQONAL RA11PB.,:
10 : USE -CLASS "B" CONCRETEWITH A SIDEWALK ' _INI$H IN ORDER TO OBTAIN A ROUGH NON 800 TYPE SURFACE,
11. PLACE: A )t" .EXPANSION JOINT WHERE THE CONCRETE WHE I OFip�IR RAMP JOINP THE GifRQ AHD AS'SNDWN ON STD OYKi• 848.01-.
12, PLACE ;THE'INS DE PEDESTRIAN CROSSWALKITNES NO CLOSER IN`THE INTERSECTION BY BISECTING THE IIfLTERSECTION RADIIx
WITH :ALLOWANCE OF•A 4' CLEAR ZONE IN THE VEHICULAR TRAV.ELmy WHEN ONE RAMP IS ;N8TALLED, jSEE WTI. V)
'p IS: THERPE ED STRIAN CROSBSCWALK LIN 8E PPDLACE'rDIAAGQRNAL�RAMPSL''ITH _SPEARED PS"I WHEELCHAIR RAMP 'WILL FALL: WITHIN
Z gS,LOOR OF
IDES SO. E4 . OF FULI;. HEIGHT .CURB .FALLS'.1MIklTIN
THE CROSSWALK MARKINGS ON: EACH SIDE.CF THE: FLARES..,.
n
0 14. CONSTRUCT THE,' PEDESTRIAN CROSSWALIE:A; MINIMUM'OF OF S FEET. A CROSSWALK WIDTH DF'->IQ FEET OR- GRENM :IS DESIRABLE.
Is. USE STOP LINES; NORMALLY PERPENDICULAR TO'THE LANE LINES; WHERE IT IS IMPORTANT TO CA THE POSNT BEHIND WHICH..
VEHICLES ARE'AEOUZfiEO TO STOP IN COMPLIANCE ]NITH.A TRAFFIC SIGNAL; -STOP SIGN OR OTHER LEGAL REQUIREMENT- AN UNUSUAL APPROACH
SKEW •MAY REQUIRE THE PLACEMENT OF THE STOP LINE TO BE PARALLEL TO THE INTERBECTIN(i:ROADWAY,:.
18. TERMINATE PARKING A MINIMUM OF 2D FEET BACK pF PEDESTRIAN CROSSWALK.
17: PLACE ALL PAVEMENT MARKINGS IN ACCORDANCE WITH THE LATEST EDITION OF THE MANUAL OF UNIFORM TRAFFIC-CQNTRO,:: DEVICES (NUTCOY,
PUBLISHED BY THE FEDERAL HIGHWAY.ADMINISTRATION AND. THE NORTH CAROLING: SUPPLENENT.'TO.7HE.MULGQ:.
z
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INOT P Is•I•u[ FOR NEr coN Tloxl 48'�fl CONSULTANT ALL STREETS TO BE PUBLIC
8
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Note: OFFSITE HOUIF
SES-SCALED FROM
HANOVER, COUNTY GlS
NEW �`' �" ♦ �' e
SPOT ELEVATIONS FIELD READ•11-20-12
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+ f r ► t f + ► ► t t ' f ' �, + f �
/ l I / d t + f 'r ► f + f +J d / � t + + f 'f t + r � +f..+ '+ e + + 'd � 't r + f + '► r 'ram r + f �\ ...
/ / / / I r t f f + ► + / �' f + ' ? r + ► +� r + ' r f + t ' r ' r + r ► / / •
f + a t I + t
/ / I � ' t ► t f ' + f + ' /�
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f
f f f / / + f f + d t + + f ► t d. jam' + t r + f + t . r �' �i i(
� f ::. o i ► ... t '- f o� � r � , + / \d\ � �//d/
i if a d = d + e t d �►
�OF 0 f , ►: r j + r + tom. -# + ►. r ,.�...+ �\ �� �f%/��i/
•�. t f y r r f f + e f + + /� .. + d`- + + :..z d _ r + +� ' � t ,� `" 't � � . f � � / /�' �� �f e
+
`**4%b� + d ' ' d ! d t + e + � + d e r ' � +// + r r d ► a. f � + ..����� f�/� \�` '���\� +r + f + ►� d / i� t�+ r +
/
' / r'► +'► ► t►' ref d'+ + r' �++��e' d° o
xc/�
//
' + r dd + r r + +t d r d f f/ f f a t e�,i+ d�+ .� r + r t r + r ► t ' d + •"✓�/ / 'fit 'a / d ► d 50 25 0 50
SCALE IN FEET: 1 50
+vpw
S � f ► r t f+ f f � f+ r j'
, f d / `
r + $ //11 f r f ' + t t
+ ' ► ' + ' ' + + + ' ' ' + / /+ + f + + t ' REV. NO. REVISIONS DATE
t r + f f ► f d + d /!+/'
+ + _ ► , t + f f d t ► r t f .. l ! . �� + + r
t ► t �7 t f d/ G9 r + / r r f 4 1 r + r f Copyright O. Hanover Design Services, P.A.. All rights reserved Reproduction or use of the contents of this document, or additions or d letbns to this
_ d r f f d + r, t ,�•�' r / + - f - [ t r f d ►_ document. In whole or pat, without written consent of the Load Surveyor or Engineer, Is prohibited. Only copies hnm the odgkot of this document
d f + ' t t + f ► t + + t f�® d f '/ r ' f `, + r r ` d t r r ► f f marked with the original signature and original seat of the Surveyor or Eng1how. shoN be considered to be valid and true oop"
f ' + f ' +,i ' r ' + ' ' 'd ' + ► �+ ', '�r L { RfIVG BdRA1V Ti ' ',i + r f + ' ' fd ' r ' + r, ► t/
i
A 1zo` tie
APPROVED
NORTH CAIt UNA EN II OMMENTAL
I` IAMACE ENT COMMISSION
S4P it-28-1Z
F—CEIV
NOV ?721i2
Y.
OFFSITE DRAINAGE SUPPLEMENTAL SHEET
Wildflower Subdivision
Pond No.1 Project Area
HARNETT TOWNSHIP NEW HANOVER COUNTY, NORTH CAROLINA
`,�`oCAR 0�
itsesl�etgt a
SE AL
a 20007
idv se;,1�
tt-?4D.ice 1
HANOVER DESIGN SERVICES, P.A.
LAND SURVEYORS, ENGINEERS & LAND PLANNERS
1123 FLORAL PARKWAY
WILMINGTON, N.C. 28403
PHONE: [phone] LICENSE No. : L,-0597
Dote:
9-15-12
Scale:
1 "— 50'
Drawn:
DSH
Checked:
GA W
Project No:
OFFSITE DRAINAGE
11-26-12
Sheet No:
1
Of: 1

y � �
i

CURVE
RADIUS
ARC LENGTH
CHORD LENGTH
CHORD BEARING
DELTA ANGLE
C1
311.77'
181.63'
179.07'
S 57'42'04" W
3322'42"
C2
230.00'
396.27'
349.03'
N 55'02'41" W
98'43'56"
C3
230.00'
171.43'
167.49'
N 27'01'36" W
4742' 18"
C4
230.00'
1 80.20'
79.79'
S 46'47'55" E
19'58'41"
C5
230.00'
314.84'
290.83'
N 87'35'40" W
78'25'49"
ADDITIONAL NCDOT NOTES:
1. FIRE HYDRANTS TO BE 18' FROM THE R/W MAXIMUM.
2. THERE SHALL BE NO ENCUMBERANCES WITHIN THE NCDOT
RIGHT-OF-WAY.
3. ONLY NCDOT APPROVED MATERIALS ARE TO BE USED
WITHIN THE RIGHT-OF-WAY.
4. ALL STEEL AND IRON PRODUCTS WHICH ARE PERMANENTLY
�AO5\6
\ LOT 182
1
Ole
\ � , 21 20 ,
\ \ // \ 2219
,�y ,/ ♦, \, 23 ,_ LBEI ,gRLE qOAD
loe "09 �S•F \ \ CURB INLET W\ /GRATE
\ LOT 187 / / / 30 /RCP� \ NV. 29.71/
38 ` /' �6' 2-10 DBL ♦♦ ♦♦
/ / h p \ CURB INLET , * 5 / CURB INLET E ♦ %00
" GRATE 32,38 / GRATE 33.28
\ / /< y,bh", xb� \ NV. 29.77 / i aQ / INV. 29.70 ♦ //
\ / / ,/ ♦ , / INV. 29.50 CON(. �' / �� / / n\ CURBGRAT133,27NLET W 56 ♦♦ ��
// �'♦ WALK \ "G / / ♦♦ INV. 29.60 �♦ ,Y
ol'�` `` 30 2-s ` �� 54 `� 55 \ •'' OPEN S
LOT 198 /" / i \ / 2-9 DBL ♦ v
\ / \ \ CURB INLET F // /
/' )�C /' ♦ ♦ GRATE 32.7Y 3 Q j CURB INLET W CURB INLET E ♦ /
/ \ / ♦ ♦ INV. 29..W �o GRATE 32.62 GRATE 32.70 ♦ /
\G/ ♦ 31 Q� /j LINV. 28.95 INV. 29.12
�``/ /' ♦♦ \� PG�' '' / wCR
�\-53�♦/\ ♦
'/ / / \CURB INLET y /
/32G/j e GRATE
3.64/
l000,/ NV. 29.69
33 /'
,•��
\
.`\
/000
'`
,-� ♦\ 34 2-4A DBL Q,�/� y'1`�' //\CURB INLET CURB INLET '� 52 V ♦`
\\\\ CURB INLET E `I �►/ t;Q / GRATE 32.58 GRATE 32.55 \ /
\ GRATE 32.05 P / �ti �k� / INV. 28.41 INV. 28.88 \ \ / \
INV. 29.38 / g5% CONC. \ \s \ i
35 `�\` CURB INLET W , y WALK \\ 43 `\ �r� 51 O / ♦♦
\\\ NV. TE 29323 8 `\ 42 \ /' \ oo ` '
/ / `♦ `\ /'' WALK ` 'A ��m \ , `♦
VIP
MA
�� ♦ 41 ♦♦ /, 44 //'\ yCURB INLET 50
36 / / 2-4 ` \ / / \ \ RATE 32.65
\CURB INLET r d r d \ // ,/ INV.30.70 ,/
\ GRATE 31.90 a r d r d r / MA
IV. 28.95 r d r d r e r ,'✓'r � \ / /
--- GQ \ d r d r d r r r d r/i�� d r 1 /' CURB INLET x� .� 49 / `\i
o 001, \ / GRATE 32.38\ \ /
\ /� \\` d r d r a r d r d/ r d `s d I , 45 INV. 29.22 ,�
37 / \ d r d r d r d r d r d r d\r I /. 11#1 00 \ \ \\ ,/
( \ r d r d r d r\ / / \
40 \ ♦\ r d r d r d r / y/ 4Q /
�/ ' ' 2.3 \♦\\ �\ d r d r d r \ \ oe 46 , ,/
38 CURB INLET `\�`\ /r/ O.lr r d r �' `\ /' �/' gbr`1 �yorj�xt
U �(Lj J GRATE 31.33 \ \ /�� r d r d r / / `' //
__ I LU� INV. 27.13 39 �\♦\ '�// , s r d r ll \ // Y/i /
a. Ile
47
' t'tpCJp/
;
x OPI; PA
5.2 CE`\
1
' i
II ' fit
36`RCP
C d
i
BOX r d r r
JUNCTION B � 8. JUN 6
RIM 31.44 \ \ � J � /
INV. OJ /i// ���/ -
\ \\ MAINTENANCE PLAN BOTH PONDS
AQUATIC VEGETATION \ INV. 26.50\ \ \ V / / / �i 1. All measures to be inspected weekly and after any rainfall
AQUATIC VEGETATION zaNE event and needed repairs made immediately.
FROM EL- 27.0 TO EL- 2&0 \ \ ��� // � / / i� OS 2. Sediment Basin to be cleaned out when the level of sediment
SUITABLE SPECIES FOR PLANTING IN reaches as shown on individual pond plans.
THIS ZONE ARE AS FOLLOWS:
SAGITTARIA LATIFOUA (COMMON ARROWHEAD) \ \ SAp7TARIA LANCIFOUA (DUCK POTATO) / TOP 30.00 3. Construction entrance to be maintained to o condition to prevent
/ \ BOTTOM 25.48 mud or sediment from leaving the construction site. Periodic
SAURURUS (XRNUUS (LIZARDTAIL) topdressing with 2"atone may be required. Remove all objectionable
PELTANDRA ERt;INICA (ARROW ARUM) \ �.� ��\ / WEIR 28.97 material spilled, waded or tracked onto public roadways immediately.
IF ONE OR MORE OF THE SUGGESTED SPECIES \ \ \ / / INV. 18"RCP 27.50 '
Is VVEGENTATION�COMMON TO THECOASTALWETLANDS
� \ / INV. 6-PVC 27.45 4. Sediment to be removed from behind the an Silt Fence and
\ INV. 27.45 \ \ / i
REGION MAY BE SUBSTITUTED. / / \ � � inlet protection devices when it becomes 0.5 deep. Fencing
and inlet protection to be repaired as needed to maintain a
50 PLANTS PER 200 SF OR APPROX. 20 LF AT \ barrier.
WATERLINE TO BE PLANTED; APPROXIMATELY 1410 1 7252.8 Sq. Feet /
PLANTS FOR POND NO. 2 at Elev.=275 ��, �� 5. All seeded areas shall be fertilized, mulched, and re -seeded
.
POND PERIMETER - 56&1' as necessary, according to specifications provided, to
22133.8 Sq. Feet maintain a suitable vegetative cover.
at Elev.=29.0 6. Inspect rip -rap outlet structures weekly and after significant (1/2 Inch
State a Store 29,540 sf STATE WATER QUALITY POND (DESIGN) - or greater) rainfall events to see if any erosion around or below rip -rap
g has taken place, or if stones have been dislodged. Immediately make
Surface Area required = 16,075 sf all needed repairs to prevent further damage.
POND 2 AS -BUILT SUMMARY C 06-25-13) 1 Surface Area provided = 16,500 sf @ WSEL 27.5
Storage Vo (ume requ i red = 25,120 cf 7. Inspect baffles at least once a week and after each rainfall. Make any
ITEM AS -BUILT Storage Volume provided = 29,875 cf @ WSEL 29.0 required repairs immediately.
Storage Volume Drawdown Time = 3.9 days
8. Skimmer to be inspected weekly and after each significant rain event
1. Alt slopes permanent vegetat f on No
STATE WATER QUALITY POND (AS -BUILT) - (1/2 inch or greater) and repaired immediately. Make sure that the
2. Norma I. poo t surf ace area 17,253 sf Surface Area requ i red = 16,075 sf skimmer does not become entangled In basin vegetation or trapped in
3. Normal pool Surface Elevation 27.5 MSL Surface Area prov i ded = 17,253 sf @ WSEL 27.5 silt due to low water conditions.
4. Pond depth (deepest point) 12.3 feet Storage Volume required = 25,120 cf
5. Bottom elevation ( deepest) 15.2 MSL Storage Vo tume prov I ded = 29,540 cf @ WSEL 29.0 VEGETATIVE PLAN -
6. Or I f I ce elevation 27.5 MSL 1. Permanent vegetation to be established In accordance with
7. Weir elevation ( State storage) 29.0 MSL "North Carolina Erosion and Sediment Control Planning and
8. State storage vo lume 29,540 cf Design Manual", Section 6.11. latest version. See next Sheet.
9. 10' vegetated she If Yes g
10.
10' access
Yes
11.
Forebay
Yes
12.
Outtet elevation
27.5
MSL
13.
Primary Spillway elevation
30.0
MSL
14.
Emergency Spillway elevation
30.1
MSL
15.
Embankment elevation
31.2
MSL
16.
Side slopes (typ 1 ca t)
2. 6i 1
to 411
17.
Orifice size
6' PVC
w/2' ho t e
Wildflower Subdivision Pond No. 2 VOLUME REQUIRED, R=E(P)(Pj)(Rv)/123(A)
Wet detention/retention pond
Additional Catculation Summary for NCDENR / DWQ i SEE PAGES A.1 and A.2, 'Controlling Urban Runoff,
A Practical Manual for Planning and Designing Urban BMPs'
WATER QUALITY CO(Pj)NSIDERATIONS - (P1. 5'
= 0.9
Impervious area calculations, See Project Data Sheet (Rv)= 0.05 + 0.9(194,452/518,540) = 0.3875
(A)= 518,540 sf
TOTAL IMPERVIOUS = 194,452 sf R= E ( 1. 5) (0. 3875/123 C 518, 540) = 0. 58 acre feet
TOTAL AREA DRAINING TO POND = 518,540 sf (11.90 acres) = 25,120 cf REQUIRED STORAGE
29,875 cf PROVIDED STORAGE @ ELEV. = 29.0
SA REQUIRED, 194452 / 518540 = 0.375, or 37.5% DRAWDOWI*
Average head from storage elevation to orifice -
At 4. 3' depth, 90% TSS removat, from chart - SA/DA factor = 3.1 29. 0-27. 5 / 3 - 0. 5'
518,5410 x 0.01 x 3.1 = 16,075 sf SA REQUIRED 2' drain (2' orifice In 6' PVC Cap) to draw -down ponch
At Etev. = 27.5 = 16,500 sf SA PROVIDED Orifice equatiora Q = CA(2gh)^1/2
T=3.9days
1 1/2" MIN. BITUMINOUS PAVEMENT
L i i I
CONCRETE CURB DETAIL SEE SHEET 3of4
FOR CURB INLET DETAIL
NOT TO SCALE
50'
1 28' 1
.31:WITH SIDEWALK OPTION
-1 /2" . • 1 1 /4" : 1' -1/4* : 1' 1/2' : V I
l l' 1'-i I-- 13' 13' 1--1 1 2' 1 5' 1 4'
/ /
GRASSED AREA
\
** 8" ABC
\SIDEWALK/
** 1,5" S9.5A
GRASSED AREA
2' VALLEY CURB ASPHALT
"
BASE COURSE
RESIDENTAIL LOCAL
ROAD
"NOTE WELL. NOT TO SCALE
PAVEMENT THICKNESS AND SUBGRADE REQUIREMENTS
MAYBE INCREASED PER RECOMMENDATION OF GEOTECHNICAL
CONSULTANT.
ALL STREETS TO BE PUBLIC
CONTRACTOR RESPONSIBLE FOR COMPACTION TESTING
_ 1
STATE STORAGE VOLUME I
1-- a 29,124 of
EMBANKMENT 30.1
EMERGENCY RGENCY SPILLWAY EL = 28.7 3ui
- _ _ N
Z !'
TOP OF BOX = 27.5
STATE STORAGE ELEVATION = 26.5 WEIR CUT-26.5
NORMAL WSEL- 25.5 INVERT OUT= 25.5 18"RCP W
/ O�
/ + 1 PIPE
/ N 10' WIDE, tort TOP 27.48
@VSHELF EGETATEDOS BOTTOM 23.53
Ei.= 25.0 TO 26.0 WEIR 26.53
Aquatic vegetation Zone INV. 18"RCP 25.46
of / \ NCDENR-DWQ VOLUME & INV. 60PVC 25.37
/1 SEDIMENT REMOVAL ELEVATION= 14.0
/ 1' MINIMUM (BOTTOM EL- 11.8)
/ POND BOTTOM MAY BE
/ 8 OVMExCAVATED FOR EMBANKMENT SECTION POND No.1
/ SEDIMENT STORAGE AS -BUILT ELEVATIONS
1.1 O STATE STORAGE VOLUME
29,540 of 1
/� \ `a / / 7 , EMBANKMENT 31.2 ul
1
\ EMERGENCY SPILLWAY EL - 30.1 3 n 1
TOP OF BOX = 30.00 d
STATE STORAGE ELEVATION - 29.0 WEIR CUT 28.97 I
NORMAL WSEL- 27.5 INVERT OUT- 27.50 18"RCP W I
6 n +1 PIPE
���� �\ v' vEGErDEEDa1 TOP 30.00
r (A.Q� `\\� `25.ESHE 27.0 TO 28.0 OS WEIR BOTTOM28.97 48
G Aquatic Vegetation Zone INV. 18 RCP 27.50
/ NCDENR-DWQ VOLUME & INV. 6"PVC 27.45
3 SEDIMENT REMOVAL ELEVATION= 17.0
\ ` / / / 1' MINIMUM (BOTTOM EL_ 15.2)
POND BOTTOM MAY BE
_ 1-C OVEREXCAVATED FOR EMBANKMENT SECTION POND No.2
\ , INV. 30.04 2 \ SEDIMENT STORAGE AS -BUILT ELEVATIONS
/� / / 0,WELDED BAR
12 \ / / TRASH RACK 3' WIDE WEIR CUT
BOLTED IN PLACE
/ ONE EACH BOX
I INLET /' 27.a6
E 30.75=4
26.83 6' PVC WEIR
1 1 / \ 1 Screew T)pe EL-26.s3 4 t
A / \ 26mug 18'RCP
xQ IINV­INV:25.46 ouneT
♦ � 1 25.37 \ PPE
\ CURB INLET-
\ GRATE 31.74 10 \ STORM MH
\\ 6' PVC CAP
INS 26.32 woe�l'o \ .r control ortke
W_ _ ❑ `N V. 29.00 ��` \ \ \ EL= 23.53 -afma
CURB INLET
C CU
? GRATE 34.03 ca \
\ \
V. 26.23 f � - o� ��' i>r cL6� � \ \ \ \ OS 5.
o Rc Qom(•/ �� \/0\ \ \ Ci MIN. OIDCASTLE 4848
A 'J +� / or ekµ ivolent
S�GA • \ \j ^' SECTION VIEW
wP 1y10 \ / OUTLET STRUCTURE DETAILS (POND 1)
_ RNO ( / / AS -BUILT ELEVATIONS NOT TO SCALE
CURB INLET su
GRATE 33.74 \ \� `I 0 `\ \ /�°e / / QP�F�'o WELDED BAR
INV. 25.80 - ' 3N18 \\ \\N y'cr. \ �� // /p�p�JOJ TRASH RACK
3' WIDE WEIR CUT
\� 5 A G 26 / / ti k. Q BOLTED IN PLACE
`Q 5 �11 ONE EACH BOX
C-) 3 1 O , 65
\\ \ Z� \ / / / / / EL-30.00 4
STORM MANHOLE C1-2 ScsPTyCPa EL 2
ew8.97 4 1(
L y04 a La/ / \ 9 / - i / NIM 34.05 V. N 27.70 Plug 18'RCP
INV. OUT 27.70
�INV- INV-27.50
t \, 27.45 \PrE
CNV.126 25 1 1 - \
O
L STORM MH � O� P � � 1 -
RIM 30.18 m ,gyp \� �t(� L��3Y� \ 6' PVC CAP
INV. 24.93 (/) �,P 5F, '\ , \ With 2' hole drilled
`' �'�\ for control orifice 9'
I,/i/' ` �iiil I EL=25.a6 e EASE
f
, 2652 .4 S Feet
_('i at lev.=25.5
�� / // \� iil i'r MIN.
INV. 25.23/ i <<,;I•:*�- \ �11ill' I 31721 1 S Feet °or equivalent �
ii" •\; at E ev.=26.5 SECTION VIEW
I ' l i !il t ��r ill t�II I
-1 -� _ 1 8 -
�� -- % ore 1 - - -- I Stale Storage 29 24 sf
� -_ , OUTLET STRUCTURE DETAILS --� POND 2
i I
,� !I 9
i j I , l r ram.-=-`_ _ = _ - ' - / • / � 1 ? I I ! NOT TO SCALE
AS -BUILT ELEVATIONS
STATE WATER QUALITY POND (DESIGN) -
/ ..,�,`.•} ; L� �: J� ,,� = ���=' i� ,=;-�J f i f w Surface Area required = 12,600 sf
�� �c�7 i,!lj(�_= _ - i : ; �' / Surface Area ``` Y ._^� i - i--- ` provided = 25,000 sf @WSEL 25.5
I I L i r: f ''; Storage Vo hire required = 20,100 cf
Storage Volume prvided = 29,125 cf @ WSEL 26.5
Storage Vo lume Drawdown Time = 3.8 days
- 18 kCIO i I,MV. 25.34
OS STATE WATER QUALITY POND (AS -BUILT) -
f TOP 27.48 Surface Area required = 12,600 sf
BOTTOM 23.53 Surface Area provided = 26,527 sf @ WSEL 25,5
WEIR 26.53 =
Storage Volume required 20,100 cf
INV. 18"RCP 25.46 Storage Volume provided = 29,124 cf @ WSEL 26.5
INV. 6"PVC 25.37
-7 POND 1 AS -BUILT SUMMARY (06-25-13),
ITEM AS -BUILT
' 1. All slopes permanent vegetation No
2. Normal pool surface area 26,527 sf
3. Normal pool Surface Elevation 25.5 MSL
WI tditower Subdivision Pond No, 1
VOLUME REQUIRED, R=E(P)(Pj)(Rv)/123(A)
4.
Pond depth (deepest point)
13.7
feet
Wet detention/retention pond (DESIGN DATA)
5.
Bottom elevation (deepest)
11.8
MSL
Additional Catculatlon Summary for NCDENR / DWQ
SEE PAGES A. 1 and A 2, 'Controlling Urban R�,,
A Practical Manual for Planning and Designing Ur Urban BMPs'
6.
Orifice elevation
25. 4
MSL
(P)= 1. 5,
7.
Weir a tevat i on (State storage)
26.5
MSL
WATER QUALITY CONSIDERATIONS -
(Pj)= 0.9
8.
State storage vo tume
29,124
cf
Impervious area calculatlonsn See Project Data Sheet
(Rv)= 0.05 + 0. %150, 457/501,522) = 0, 330
9.
10' vegetated she if
Yes
(A)= 501,522 sf
10.
10' access
Yes
TOTAL IMPERVIOUS = 150,457 sf
R= E(1.5)(0.320/123(501,522) = 0.461 a_re feet
11.
Forebays
Yes
TOTAL AREA DRAINING TO POND = 501, 522 sf( it. 51 acres)
= 20,100 cf REQUIRED STORAGE
12.
Outlet e t evat i on
25.5
MSL
29,125 cf PROVIDED STORAGE @ ELEV. = 26. s
13,
Pr i mar S I t I. way e t evat i on
Y p Y
27. 5
MSL
SA REQUIREDn 150, 457 / 501, 522 = 0. 30, or 30Z
DRAWDOWN,
Average head from storage elevation to orifice -
14,
Emergency Spillway elevation
28.7
MSL
At 4. 5' depth, 90Z TSS removal, from chart - SA/DA factor = P. 5
26. 5-25. 5 / 3 = 0. 33'
15.
Embankment elevation
21.0
MSL
501.522 x 0. 01 x 2. 5 = 12,600 sf SA REQUIRED
2' drain (2' orifice to 6' PVC Cap) to draw -down pond,
16.
Side slopes (typical)
2. 61 1
to 41 1
At Elev. = 25. 5 = 25,000 sf SA PROVIDED
Orifice equatioru Q = CA(2gh)^3/2
17.
Orifice size
6' PVC
w/2' ho le
T = 3. 8 days
STORMWATER RECORD DRAWING
ALBEMARLE ROAD
STURBRIDGE COURT
2
REVISED TO ADD ADDITIONAL INLET & RCP ADJACENT TO LOT 65
2-11-15
1
REVISED TO CHANGE EASEMENT WIDTHS AND LOCATIONS LOT 65&66
7-17-13
REV. NO.
REVISIONS
DATE
r -
WILDFLOWER SUBDIVISION ECEIVE
(LANTANA CROSSING) JUN 18 2015
w! QECC'RT
LOCATED IN NEW HANOVER COUNTY N.C. BY.
wq®t'c'=•6`�SSfQ`®'® 'moo
b8•t �[ ��ei c+
X ;�� SEAL
20007
S46
oeemeee+®� y �V
t 0. Hanover
Servicam
AN rights reserved. Reproduction or use of the contents of this
or addition* or
etions to
ddocummeent, In whole or port, without wriwrits P.A. eanwit of tM land S Engk,ser. Is ProhbRed. Only copies tram LU, origt� of this document,
�M
marked with the aAgind fldnatun and anginal sed of the sw.wyar ar Engineer, shad be considered to be valid and true oopisa dhollis®hdsilm.eom
F:\AII\PROJECT FOLDERS\10010-Wildflower\ASBUILT\10010 NCDOT ASBUILT.dwg
OWNER: WFDC PROPERTIES, LLC
P.O. BOX 3649
WILMINGTON, NC 28406 phone:[phone]
HANOVER DESIGN SERVICES, P.A.
LAND SURVEYORS, ENGINEERS & LAND PLANNERS
1123 WILM FLORAL PARKWAY
WILMINGTON, N.C. 28403
PHONE: [phone]
Date:
06-14-13
Scale:
HORZ.: 1 "= 60'
Drawn:
JLW
Checked:
DSH
Project No:
10010
Sheet No:
1
Of:
i
CMT)
�� l„1.'R-TIF1Cf�-flJnl �Lfi'il

• .• 120 180
CURVE
RADIUS
ARC LENGTH
CHORD LENGTH
CHORD BEARING
DELTA ANGLE
C1
311.77'
181.63'
179.07'
S 57'42'04" W
33'22'42"
C2
230.00'
396.27'
349. 33'
N 55'02'41" W
98'43'56"
C3
230.00'
171.43'
167.49'
N 27'01'36" W
42.42'18"
C4
230.00'
80.20'
79.79'
1 S 4647'55" E
19*58'41"
CS
230.00'
314.84'
290.83'
N 87'35'40" W
78.25'49"
ADDITI❑NAL NCDOT NOTES,
1. FIRE HYDRANTS TO BE 18' FROM THE R/W MAXIMUM.
2. THERE SHALL BE NO ENCUMBERANCES WITHIN THE NCDOT
RIGHT-OF-WAY.
3. ONLY NCDOT APPROVED MATERIALS ARE TO BE USED
WITHIN THE RIGHT-OF-WAY.
4. ALL STEEL AND IRON PRODUCTS WHICH ARE PERMANENTLY
1� 21 ' 20
22
�iALBEN�gRLE qOAD9
/ S,p �/S• \ CURB INLET W\ / , ��
/ 30"RCP �• F \ GRATE 32.38 \ / ti6j 2-10 DBL
\
LOT 187 / �c \ INV. 29.71 / �'`1 / /ti \ k / CURB INLET E ` �i
/ h CURB INLET 9
/ \ oR \ / / GRATE 33.28 �
\ / ti x GRATE 32.38
\\ / /< ti�'yh, �� ti)� \ NV. 29.77 / i n INV. 29.70 56 0/
/ / / INV. 29.50 x / / / •� / CURB INLET W 6 /
/ / / CONC. / '�� / GRATE 33.27 /
\\ / // / �'� WALK \ s � // �` INV. 29.60 \` /Y
\;oo, /'�` /' `` 30 2-s \ ` emu. �� 54 `� 55 `� OPEN
LOT 198 / \ / i ` / 2-9 DBL ve
\ / CURB INLET ` E` // /
/ /' >- ♦ /' GRATE 32JY 3 Q j CURB INLET W CURB INLET E /
/ \ / INV. 29..W �� 3 GRATE 32.62 GRATE 32.70 ,/
/ / \G / // L INV. 28.95 INV. 29.12 /
,' ,• �o,' ` OV �' .8�� \\ 2-7A 53 ♦ ,•loll ��
/
/ lll�V / , /� \CURB IN 32 LET y
/ / / / / GRATE 32.64
33
/ \ /�' \ / V
34 124A DBL Q�V` , .y��' / \CURB INLET CURB INLET { 52
CURB INLET E / . 4 •�� GRATE 32.58 GRATE 32.55\
\ GRATE 32.05 P loll,�'L6� / / INV. 28.41 INV. 28.88 \ /
INV. 29.38 a g5 j CONC.
\`�\ CURB INLET W / / `' 'C WALK 43 \ �,A* \\
35 \ ,\ GRATE 31.98 > �� '�sa ��• � 51 O `�
\ \ INV. 29.23 - 42
' ' / `\ /'' WALK \ ,f+ 42
�� 41 �\ 44 /�\ yCURB INLET 50 O
36 x/
�! 2-4 / \ \QRATE 32.65 � �
\CURB INLET r r �/ ,/ INV. 30.70
- - - GRATE 31.90 r r r r r r/ � / 1-3A 1�9 \ ' /
28.95 r . r r r r r $ r \ / /
r`!
- - - •��Q \ 'C ' CURB INLET .� 49
O r r r r r r r ro � /i ` r r , GRATE 32.38 xa' ,/
\ /� \\` r .4 s r r r r r e r r r r `r r / 45 INV. 29.22 \ \
37 e r r r r r r r r r r r r`r1I / ♦ \ \ \
\ \ r r. r r r r r tit /� ,/ \ /
/ Q
40 \\`` r r r r r r r �� \y' 48
r 0 r r r r .01 /
rrr+rrr`464_1 .�
�\ / 0.1
38 CURB INLET \ \ / / /� r r r r r r1 / / fo,
U I(lj GRATE 31.33 \� \ / //� r r r r r ( V / / `' yg. // /
m I LL►� INV. 27.13 39 \��\ // /// /^ r r r r �' �/ �//
0- I� Q-
om' � / �I r r , r ` 47
t// �� /� 1 � r r a r � ,�
� ! � I
'PACE
' 15.2 OP
\111
p11 r r r . r r r ` /
r r r r r r r /
/
//
<<<i
JUNCTION BOX 36"RCP " t�
\ �
i
RIM 31.44
INV.�\ \�� J % �t 0S MAINTENANCE PLAN -BOTH PONDS
AQUATIC VEGETATION \ INV. 26.50\ \ \ V
� � i 1. All measures to be inspected weekly and after any rainfall
AQUATIC VEGETATION ZONE \ \ \ \ i ��� event and needed repairs made immediately.
FROM EL- 27.0 TO EL- 2&0
SPECIES FOR PLANTING IN \ \ � � i � � i� 2. Sediment Basin to be cleaned out when the level of sediment
THIS ZONE ARE AS FOLLOWS -
SUITABLE\ \ '�i reaches as shown on tndtvidual pond plans
SAGITTARIA LATIFOUA (COMMON ARROWHEAD) \ \ TOP 30.00 3. Construction entrance to be maintained in a condition to prevent
- SAGITTARIA LANCIFOLIA (DUCK POTATO) / \ BOTTOM 25.48 mud or sediment from leaving the construction site. Periodic
SAURURUS CERNUUS (LIZAR W IL) \ \i i \\ topdressing with 2"stone may be required. Remove all objectionable
PELTANDRA VIRGINICA (ARROW ARUM) \ �� a, \ WEIR 28.97 material illed. washed, or tracked onto public roadways immediate)
IF ONE OR MORE OF THE SUGGESTED SPECIES \ \ \ \ / /i INV. 18"RCP 27.50 p Y
IS UNAVAILABLE, APPROPRIATE WETLANDS / " 4. Sediment to be removed from behind the an Silt Fence and
VEGETATION COMMON TO THE COASTAL CAROLINA INV. 27.45 \ \ // INV. 6 PVC 27.45 X
REGION MAY BE SUBSTITUTED. inlet protection devices when it becomes 0.5 deep. Fencing
50 PLANTS PER 200 SF OR APPROX. 20 LF AT �' �a `- -� and inlet protection to be repaired as needed to maintain a
WATERLINE TO BE PLANTED: APPROXIMATELY 1410 1 7252.8 Sq. Feet \\ / barrier.
P�PERIMETER
FOR POND NO. Z at Elev.=27.5 \ �, 5. All seeded areas shall be fertilized, mulched, and re -seeded
�_ _ as necessary, according to specifications provided, to
22133.8 Sq. Feet maintain a suitable vegetative cover.
at Elev.=29.0 6. Inspect rip -rap outlet structures weekly and after significant (1/2 inch
State Storage = 29,540 sf STATE WATER QUALITY POND (DESIGN) - or greater) rainfall events to see if any erosion around or below rip -rap
has taken place, or If stones have been dislodged. Immediately make
Surface Area requ i red = 16,075 sf all needed repairs to prevent further damage.
POND 2 AS -BUILT SUMMARY (06-25-13) i Surface Area provided = 16,500 sf @ WSEL 27.5
Storage Volume requ i red = 25,120 cf 7. Inspect baffles at least once a week and after each rainfall. Make any
ITEM AS -BUILT Storage Volume provided = 29,875 cf @ WSEL 29.0 required repairs Immediately.
Storage Volume Drawdown Time = 3.9 days
1. Alt slopes permanent vegetation No STATE WATER QUALITY POND AS -BUILT - $• skimmer to be inspected weekly and after each significant rain event
( � (1/2 inch or greater) and repaired immediately. Make sure that the
2. Normal pool surface area 17,253 sf
3. Normal pool. Surface Elevation evert I on 27. 5 MSL Surface Area required = 16, 075 sf skimmer does not become entangled in basin vegetation or trapped in
P Surface Area prov i ded = 17,253 sf @ WSEL 27.5 silt due to low water conditions.
4. Pond depth ( deepest point) 12.3 feet Storage Vo tume required = 25,120 cf
5. Bottom e t evat i on ( deepest) 1.5. 2 MSL Storage Volume prov i ded = 29,540 cf @ WSEL 29.0 VEGETATIVE PLAN -
6. Orifice e t evat I on 27.5 MSL 1. Permanent vegetation to be established in accordance with
7. Weir elevation ( State storage) 29.0 MSL 'North Carolina Erosion and Sediment Control Planning and
8. State storage volume 29,540 cf
Design Manual', Section 6.11, latest version. See next Sheet
9. 10' vegetated she tf Yes
10,
10' access
Yes
11.
Forebay
Yes
12.
Outlet elevation
27.5
MSL
13.
Primary Spillway elevation
30.0
MSL
14,
Emergency Spillway elevation
30.1
MSL
15.
Embankment elevation
31.2
MSL
16.
Side slopes (typ i ca t)
2. 6i 1
to 4,1
17.
Orifice size
6' PVC
w/2' ho t o
W I l df t ower Subd i v I s I on Pond No. 2 VOLUME REQUIREDs R=E (P> (Pj) (Rv) /123 (A)
Wet detention/retention pond
ASEE PAGES A.1 and A. 2, 'Controlling Urban Runoffs
Additional Calculation Summary for NCDENR / DWQ r
A Practical Manual for Planning and Designing Urban BMPs'
(P)= 1. 5'
WATER QUALITY CONSIDERATIONS - (Pj)- 0.9
Impervious area calculations See Project Data Sheet (Rv)= 0. 05 + 0.9(194,452/518,540) - 0.3875
(A)= 518,540 sf
TOTAL IMPERVIOUS = 194,452 sf R= E (1. 5) (0. 3875/ 123 (518, 540> = 0.58 acre feet
TOTAL AREA DRAINING TO POND = 518,540 sf (11.90 acres) = 25,120 cf REQUIRED STORAGE
29,875 cf PROVIDED STORAGE @ ELEV. = 29.0
SA REQUIREIb 194452 / 518540 = 0.375, or 37.5% DRAWDOWM
Average head from storage elevation to orifice -
At 4. 3' depth, 90% TSS removal, from chart - SA/DA factor = 3.1 29. 0-27. 5 / 3 = 0. 5'
518,5410 x O.OI x 3.1 = 16,075 sf SA REQUIRED 2' drain (2' orifice In 6' PVC Cop> to draw -down ponds
At Elev. = 27.5 = 16,500 sf SA PROVIDED Orifice equations Q - CA(2W -1/2
T = 19 days
-)UUUPSI C. NI:KL I t
1 1/2" MIN. BITUMINOUS PAVEMENT
I �
CONCRETE CURB DETAIL SEE SHEET 3of4
FOR CURB INLET DETAIL
NOT TO SCALE
50'
I 28' 1 1
WITH SIDEWALK OPTION
-1/2" : 1' 1 /4" : 1' -1 /4" : 1' 1/2" : 1'
11' 11--1 I- 13' 13, 1.� 1 2' 1 5' 1 4'
/ / Z \ `SIDEWALK/
GRASSED AREA ** 1.5" S9.5A ** 8" ABC GRASSED AREA
2' VALLEY CURB ASPHALT " BASE COURSE
RESIDENTAIL LOCAL ROAD
**NOTE WELL: NOT TO SCALE
PAVEMENT THICKNESS AND SUBGRADE REQUIREMENTS
MAYBE INCREASED PER RECOMMENDATION OF GEOTECHNICAL
CONSULTANT. ALL STREETS TO BE PUBLIC
CONTRACTOR RESPONSIBLE FOR COMPACTION TESTING
STATE STORAGE VOLUME
- 29,124 of
EMBANKMENT 30.1
EMERGENCY SPILLWAY EL - 28.73
1
- - - -
TOP OF BOX - 27.5
STATE STORAGE ELEVATION - 26.5 WEIR CUT=26.5
18"RCP
NORMAL WSEL= 25.5 INVERT OUT= 25.5zVegetation
i PIPE
OS
TOP 27.48
BOTTOM 23.53
WEIR 26.53
one
INV. 18"RCP 25.46
^^^'^
INV 6"PVC 25 37
V MINIMUM I
POND BOTTOM MAY BE
OVEREXCAVATED FOR
SEDIMENT STORAGE
STATE STORAGE VOLUME
- 29,540 of
EMERGENCY SPILLWAY EL - 30.1
TOP
STATE STORAGE ELEVATION - 29.0 WEIF
��Z,f NORMAL WSEL- 27.5 INVERT OUT-
. SB
NCDENR-DWO - _VOLUME
V MINIMUM
POND BOTTOM MAY BE
OVEREXCAVATED FOR
SEDIMENT STORAGE
EMBANKMENT SECTION POND No.1
AS -BUILT ELEVATIONS
EMBANKMENT 31.2
3
m 30.00
18.97
18"RCP
•
1 PIPE
10' WIDE, 100
TOP 30.00
SSHEELFATED OS
BOTTOM 25.48
El.- 27.0 TO 28.0
WEIR 28.97
Aquatic Vegetation Zone
INV. 18"RCP 27.50
INV. 6"PVC 27.45
EMBANKMENT SECTION POND No.2
AS -BUILT ELEVATIONS
si�
N
0
W
WELDED BAR
TRASH RACK V WIDE WEIR CUT
BOLTED IN PLACE /
ONE EACH BOX
\ EL=27.48 /9 1 #41 14
6" PVC WEIR\\ 4 1(
Screw Type EL-26.53
g
18•RCF
INV- INV-25.46 aUTUN
25.37 PIPE
r u1
6' PVC CAP ;y Y
With 2' hole drilled 9.
for contra orifice EL- 23.53 e
OS r qLDCASRE 4846
Q�" \ or equivalent
\ O\j S�G� • > `� SECTION VIEW
wA .�y" \ / /T OUTLET STRUCTURE DETAILS (POND 1)
AS -BUILT ELEVATIONS NOT TO SCALE
NEW \N�'35100
�4 � � �N�I • /moo / � �e�
INV. \ WELDED BAR
\ yni3: \ / � / / /tip �P 12?1 G TRASH RACK 3' WIDE WEIR CUT
31' c� G J
BOLTED IN PLACE
G \ / /11W ONE EACH BOX
1 O� 65 EL-30.00 4
N / \ G / x STORM MANHOLE C1-2 Screw Type WEIR
8.97 4 1
' � / / / RIM 34.05 Plug
L' IQL Z ' / /INV. IN 27.70 18'RCP
/ % - \ INV. OUT 27.70
INV- INVm27.50 �
6 \ % Cl -1 27.45 \
CEO 3G �'�''�/l ' ��INV. 26.25 1 1 -
iTORM MH '' n Q�r1P� �'r i/i�-� �. ` ���
21M 30.18 C7 p F� L''�'%_�\ :� \ s• PVC trip
NV. 24.93 (� '��P����t. '\'\�\\ With 2• hide gilled ' 9
for contra orifice
EL= 25.48 g
11,4111 2652 .4 Sq. Feet 5.
r OS
;�'��� ����� i; (r i at lev.=25.5
INV. 25.23� =`_'� __i� ' % ,%!:'ij'' ! / ��� 1p MIN. OLDCASiLE 4W
% ,, '� lil! ? 31721 1 S Feet q • or equhnlent
�\r� `- _, /1f,,� ;� \�i i,�illr'i�I at E�ev.=26.5 SECTION VIEW
I
I DETAILS POND 2
I Stale Storage 29,124 sf
OUTLET STRUCTURE D
i',lll•j'�T1�/ 1 ij !j;.,fl,,_ `= - l-%'"=•,J 1j�' 11 AS -BUILT ELEVATIONS NOT TO SCALE
1 1ii ��ii,, Il (K / •%%J• +l �ti�k '-- ---- /-�'%�- �i�^��� ill
STATE WATER QUALITY POND (DESIGN) -
11; Surface Area ' required = 12,600 sf Surface Area provided = 25,000 sf @ WSEL 25.5
-
l' I L�•- ''.�i/ '(l i l' �-t'�--- � �` '�--'-' %� - ='/� � i � Storage Voluble required = 20,100 cf
i I ; �_
%. - % ! \ Storage Volume provided = 29,125 cf @WSEL 26.5
I I ' �f &,'y Storage Volume Drawdown Time = 3. 8 days
RCP INV. 25.34
! ` STATE WATER QUALITY POND (AS -BUILT) -
` OS %�1;� i � / / TOP BOTTOM 27.48
Surface Area required = 12, 600 sf
-3a _ -✓ // M 23.53 2Surface Area provided = 26,527 sf @ WSEL 25.5
WEIR 26.53 Storage Volume required = 20,100 cf
" INV. 18RCP 25.46
- - � - � �•-_=_:,� , f;�;...� Storage Volume provided = 29,124 cf @WSEL 26.5
L _ �� - INV. 6"PVC 25.37
POND 1 AS -BUILT SUMMARY( 06-25-13) l
ITEM AS -BUILT
I 1. All slopes permanent vegetation No
2. Normal pool surface area 26,527 sf
3. Normal poo t Surface E tevat I on 25. 5 MSL
Wltditower Subdivision Pond No.1
VOLUME REQUIRED R=I(P)(Pj)(Rv)/123(A)
4.
Pond depth (deepest point)
13.7
feet
Wet detention/retention pond (DESIGN DATA)
5.
Bottom elevation (deepest)
11.8
MSL
Additional Calculation Summaryfor NCDENR / DWQ r
SEE PAGES A.i and A, 2, 'Controlling Urban Runoff,
A Practical Manual for Planning and Designing Urban BMPs'
6,
Orifice elevation
25.4
MSL
(P)= 1. 5'
7.
Weir elevation ( State storage)
26.5
MSL
WATER QUALITY CONSIDERATIONS -
(Pj)- 0.9
8.
State storage volume
29,124
cf
Impervious area calculations See Project Data Sheet
(Rv)= 0. 05 + 0. 9050, 457/501, 522) = 0. 320
9.
10' vegetated shelf
Yes
(A)= 501,522 sf
10.
10' access
Yes
TOTAL IMPERVIOUS = 150,457 sf
R= E ( 1. 5) (0, 320/123 (501, 522) = 0.461 acre feet
11.
Foreba s
y
Yes
TOTAL AREA DRAINING TO POND - 501,522 sf (11.51 acres)
= 20,100 cf REQUIRED STORAGE
12.
Outlet elevation
25. 5
MSL
29,125 cf PROVIDED STORAGE @ ELEV. = 26.5
13.
Primary Spillway e t evat I on
27.5
MSL
SA REQUIRED 150, 457 / 501, 522 = 0. 30, or 30X
DRAWDOWN,
Average head from storage elevation to orifice -
14.
Emergency Sp l l tway elevation
28.7
MSL
At 4. 5' depth, 90% TSS removal, from chart - SA/DA factor = 2. 5
26. 5-25, 5 / 3 = 0. 33'
15,
Embankment a tevat i on
21.0
MSL
501,522 x 0.01 x 2. 5 = 12,600 sf SA REQUIRED
2' drain (2' orifice in 6' PVC Cap) to draw -down ponds
16,
Side slopes (typical)
2.61 1
to 411
At Etev. = 25. 5 - 25,000 sf SA PROVIDED
Orifice equations Q = CA(2gh)^1/2
17.
Orifice f i ce size
6' PVC
w/2' ho le
e
T = 3.8 days
STORMWATER RECORD DRAWING
ALBEMARLE ROAD
STURBRIDGE COURT
2
REVISED TO ADD ADDITIONAL INLET & RCP ADJACENT TO LOT 65
2-11-15
1
REVISED TO CHANGE EASEMENT WIDTHS AND LOCATIONS LOT 65&66
7-17-13
REV. NO.
REVISIONS
DATE
copyright 0. Hanover Design Servkee, P.A., rig rights reserved Reproduction or ues of the contents of this document. or additions or deietlons to thie
document. In whale or part, WWI written Consent of the Land Surveyor or Engheer. Is prohibited, Ordyy copies tram the original of this document.
marked with the orWal OgnaWn and original esal of the Surveyor or Engineer. shall be assneldered to be valid and true coplee.
WILDFLOWER SUBDIVISION
(LANTANA CROSSING)
LOCATED IN NEW HANOVER COUNTY N.C.
e'$te5oreeirr��oar
CAR0t/
SE AL
2000• „
1E'2C4P•�5
dhollis®hdsilm.com
OWNER: WFDC PROPERTIES, LLC
P.O. BOX 3649
WILMINGTON, NC 28406 phone:[phone]
HAND VSURVEYORS, ER DESIIGN SERV LACES, P.A.
LAND NERS
1123 FLORAL PARKWAY
WILM
WILMINGTONTON, N.C. 28403
PHONE: [phone]
Date:
06-14-13
Scale:
HOI 1"= 60'
Drawn:
JLW
Checked:
DSH
Project No:
10010
Sheet No:
1
Of: 1
\AII\PROJECT FOLDERS\10010-Wildflower\ASBUILT\10010 NCDOT ASBUiLT.dwg