20051701 Ver 1_Stormwater Info_20111012

WITHERS RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS
October 11, 2011
Ms. Annette Lucas, PE
NCDENR-DWQ
Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
RE: Brighton Forest Subdivision
UT to Little Creek (030402, 27-43-15-(4), C, NSW)
W&R No. 202179.30
Dear Ms. Lucas,
DS-\Io1
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OCT l 2 201?
DENR -WATER QUALFIY
WETLANDS AND STORMWATER BRANCH
We are providing a letter and the attached information in response to your September 22, 2011 letter to
Mr. Tommy Fonville with Community Properties requesting more information regarding the diffuse flow
plan for Brighton Forest Phase 6B. Our responses to the additional information requests are as follows:
1) We have eliminated the dual level spreader design as requested by DWQ.
2) Please find attached a copy of our proposed level spreader - engineered filter strip proposed
in the vicinity of FES 619. Please note that the engineered filter strip is constructed outside
the riparian buffer. Also attached are calculations and a level spreader vegetated filter strip
supplemental form.
3) FES 503 currently discharges just outside of existing wetland limits. The topography and
wetland limits prevent stormwater discharges from FES 503 from entering the riparian buffer
areas. The attached sketch also shows the location of the wetlands, the Neuse River Buffer
limits and the existing ridge line along the buffer in this area. We therefore believe that our
design eliminates the need for a level spreader. This design also allows for the wetlands in
this area to remain charged and provides maximum nutrient removal naturally. This is an
existing storm system approved and platted as part of existing Phase 5B.
Please advise if you require additional information or have any questions. We will amend our design
plans for Wake County and provide you with a final copy once our responses and revised designs have
been deemed acceptable by DWQ.
We would also be glad to meet with you to discuss any of this information. Please let me know if you
require additional information or have any questions.
Sincerely,
WITH S &-RAVENEL, INC.
m C nfield, PE
Attachments
cc: Neil Matthews, Community Properties
Tommy Fonville, Community Properties
Jack Morisey, Community Properties
Betsy Pearce, Wake County Environmental Services
111 MacKenan Drive Cary, NC 27511 tel.: [phone] fax: [phone] www.withersravenet.com License No. C-0832
1410 Commonwealth Drive Suite 101 Wilmington, NC 28403 tel: [phone] ( fax: [phone]
7011 Albert Pick Road I Suite G I Greensboro, NC 27409 1 tel: [phone] fax: [phone]
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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
t. PROJECT' INFORMATION
Project name Brighton Forest - Phase VI-B
Contact name Nick Antrilli, El
Phone number 919-469-3340
Date October 11, 2011
Drainage area number 1
111. DESIGN INFORMATION
The purpose of the LS-VFS Buffer Rule: Diffuse Flow
Stormwater enters LS-VFS from The drainage area
Type of VFS Engineered filter strip (graded & sodded, slope < 8%)
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
Design storm
Maximum amount of flow directed to the LS-VFS
Is a flow bypass system going to be used?
Explanation of any "Other" responses above
If Stormwater Enters the LS-VFS from a BMP
Type of BMP
Peak discharge from the BMP during the design storm
Peak discharge from the BMP during the 10-year storm
Maximum capacity of a 100-foot long LS-VFS
Peak flow directed to the LS-VFS
Is a flow bypass system going to be used?
241,322 fe
64,904 fe
26.90 %
0.46
2.55 cfs
5.00 min
7.22 in/hr
18.40 cfs
1 inch/hour storm
2.55 cfs
Y (Y or N)
Pick one:
cfs
cfs Do not complete this section of the form.
10 cfs
cfs Do not complete this section of the form.
(Y or N)
Do not complete this section of the form.
Explanation of any "Other" responses above
LS-VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cis
Computed minimum length of the level lip needed
Length of level lip provided
130 sq ft
12 in
12 in
10 fvcfs
26 ft
30 ft
Forebay is adequately sized.
Depth is appropriate.
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 1 of 3
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
W
y (flow depth for 10-year storm)
freeboard (during the 10-year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
30 ft
275.00 fmsl
273.75 fmsl
4.17 %
N (Y or N)
N (Y or N)

Y (Y or N)
Y (Y or N)
3.00 ft
0.00 ft
12.00 ft
0.89 It
1.11 ft
6.52 fVsec
Pick one:
N (Y or N)
OK
Please provide plan details of flow splitter & supporting calcs.
Y (Y or N)
Class B Rip-rap or Enkamat
\k
l B
III. REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result
in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the
following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met,
attach justification.
Requried Item:
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build-out,
Off-site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
Initials a Page or plan sheet number and any notes:
AL.
H
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 2 of 3

2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build-out.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable). W%
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
.7

Form SW401 - LS-VFS - 27Jul2011 - Rev.9 page 3 of 3
Permit Number:
(to be provided by D;YQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a.
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired irrunediately.
BMP element: Potential vroblem: How I will remediate the problem:
The entire filter strip Trash/ debris is present. Remove the trash/debris.
svstem
The flow splitter device The flow splitter device is Unclog the conveyance and dispose
(if applicable) clogged. of anv sediment off-site.
The flow splitter device is Make any necessary repairs or
damaged, replace if damage is too large for
repair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3
BMP element: Potential roblein: Flow I will remediate the problem:
The swale and the level The swale is clogged with Remove the sediment and dispose
lip sediment. of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise damaged -
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it. water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun Remove them.
to grow on the swale or just
downslove of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if applicable). approximately three to six inches._
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3
Permit Nurnber:___
(to be provided by DIVQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible panty.
Project tonne: BRIGHTON FOREST SUBDIVISION - PHASE VI-B
BjVP di-ainage area nwnber:
Print name: JACK MORISEY
Title: AGENT
Address: 1000 ST ALBANS DRIVE SUITE 400, RALEIGH, NC 27609
Phone:
Signature:
Date: v 2 A(;,
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, ejha,ntbr' C. Gflw?*V\ a Notary Public for the State of
L\jXA;V, CwOl+na -,County of aU \N--s}M , do hereby certify that
?p C Pt<x?-!:kAi personally appeared before me this C20y^
day of _ , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
NHNOrV
a?N0TC,
0_1 1 0
cI
SEAL
My commission expire C-
Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3
Brighton Forest 6B Bypass

Project Description
Friction Method Manning Formula
Solve For Normal Depth
Input Data
Roughness Coefficient 0.032
Channel Slope 0.06250 ft/ft
Left Side Slope 3.00 ft/ft (H:V)
Right Side Slope 3.00 ft/ft (H:V)
Discharge 15.40 ft3/s
Results
Normal Depth 0.89 ft
Flow Area 2.36 ft'
Wetted Perimeter 5.61 ft
Top Width 5.32 ft
Critical Depth 1.10 ft
Critical Slope 0.01951 ft/ft
Velocity 6.52 ft/s
Velocity Head 0.66 ft
Specific Energy 1.55 ft
Froude Number 1.73
Flow Type Supercritical
GVF Input Data
Downstream Depth 0.00 ft
Length 0.00 ft
Number Of Steps 0
GVF Output Data
Upstream Depth 0.00 ft
Profile Description
Profile Headloss 0.00 ft
Downstream Velocity Infinity ft/s
Upstream Velocity Infinity ft/s
Normal Depth 0.89 ft
Critical Depth 1.10 ft
Channel Slope 0.06250 ft/ft
Critical Slope 0.01951 ft/ft
Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.071.00)
1011112011 12:18:30 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 1 of 1

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WITHERS RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.wither5ravenel.com License No. C-0832
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S IMENT A IN ESIGN CHART ~ ~ - ` ~ ~ ~E ~ D l i l t I i l+ I i I I I f l 1 1+} + 1 ~ ~ V t C' d ~ ~ I III I + + +i~ + \ i r ~ ~
~ 1 f Ill~llll +I+ ~'~p, + + + i ~r ' I 1 ' i O
DENUDED DRAINAGE PEAI(FLOW BASIN DIMENSIONS WEIR CLEANOUT VOLUME VOLUME SURFACE SURFACE ~ , ~ \ ~ foj DEWATERING 'v , N - ~ i f f I h f ' i ! ! + ` f~ ! f
BASIN TYPE AREA AREA Q10 DEPTH LENGTH WIDTH LENGTH FREQ REQUIRED PROVIDED AREA REQ. PROVIDED HOLES* \ ~ - F ONTHS CF [CF] [SFJ [SF] \ ` , ~ V T° _ [AC] [AC] [CFSj [~'1 [FTJ [F17 [ T7 [M l [ l ~ , \ _ _ -
i 1' f r r ' + ~ 1 + r ~ f ! I I~ I it / / i t r i r l i f r
3 762 4 900 2,229 2,450 6 \ ,xo ` - ~ " ~ _ 1 CUSTOM 0.90 2.09 5.1 2.0 70 35 10 12 ` I o ~ - _ ~ ~ O - ~ ~ ~ ~ / /,rI1 li ~ f t ' ii 1 + f f' li ~ / ~ I 1~ ~ j ~ i / ! / f P f ! I ' I + + ! ~ + / + + ~ i
2 CUSTOM 2.74 9.36 22.9 2.0 155 70 10 12 16,848 21,700 9,983 10,850 18 r
7,452 9,000 4,415 4,500 12 \ ° ~ - ! , + i if + + ' i i +++1 ~ I' ~ I//' ~ i II ~ I ~ ~ , _ ~ / I f --t I
3 CUSTOM 0.70 4.14 10.2 2.0 90 50 10 12 a' ~ EXISTING
J 2 155 70 10 12 17,874 21,700 10,591 10,850 20 ` , o~ _ -__--_-IDIVE~STON~- _ _ - 4 CUSTOM 1.43 9.93 24.3 .0 - _ \ " +h~~\ 2 ~ DI1:CIi I ' E ~ 3x ~ ti
D PER WAKE COUNTY EROSION CONTROL. ~ ~ ~ -DENOTES DEWATERING HALES PER HORIZONTAL RING AS SPEGFIE a ~ ~ tie ~ k~ 0~I BLUFF" DRIVE'` _ _ _ ~ i ! 1 r ! . , + i + ~ _
HORIZONTAL RING SPACING SHALL BE AS FOLLOWS: 1ST RING AT 6°, 2ND AT 9°, AND EVERY 3 THEREAFTER UNTIL TOP OF BASIN 15 REACHED. , + ~ BRI~k~~ON BI,U - I NED AND INSTALLEC PER BRIGHTON FOREST PHASE V-B APPROVED CONSTRUCTION DRAWINGS. \ 1 \ ~ a ~ ' BASINS WERE DES G ~ _ _ ~ ~ 30*00 30k +d~ ! it ! ! l ~ i + / ~~/iii--~
- - ro~ 2gk00 + / tf 1 i + f i I r i ~ ~i 1 `r!'!r f
STORM DRAINAGE CHART 6 ~ ,3 ~ ~ " m 28+00 , / ! i i r f' ~ , r r ~ of ! r~ 1 ~ ~ ~ ` ~ ~ / / I t l ~ l f r 1Ji~ I i
E INLET D.A. IMP. D.A. FLOW Q10 SECTION PIPE " o i' ~ UPSTREAM DOWNSTREAM UPSTREAM UPSTREAM DOWNSTREAM LENGTH SLOP INLET , ~ ! 1 f 1 1 i 2700 ~ / ; f f 1 ! !1 t 1
CF5 ATERIAL " i - / -~-oo EV INVERT INVERT [FTI [FT1F17 [AC] [AC] C [ ] SIZE M ~ , , ~ ~ TRUCTURE STRUCTURE WEIR EL S r `'t
0.52 0.46 6.53 18 CL III RCP ' r ~a ~
DI 626 DI 625 296.25 293.55 292.60 95 0.0100 1.95 r ~ r ~ ~ t ,f r A / I _ ' ~ f" 4/ ~ ~ v r i ~ „ itv~~
287.25 379 0.0136 0.49 0.14 0.48 8.19 18 CL III RCP \ ~ DI624 DI 623 298.00 292.40 ~ r ,r \ _ ~
286.20 53 0.0104 2.82 0.74 0.46 17,20 24 CL III RGP ~ " 1 \ r~ I DI 623 DI 622 290.00 286.75 _ i' l ~ / (f f ~ ii + it + ! I I ! ~ ~ + L l V / . I 1 1 1~1i I~I i~ i f f ~ f 1 A
.4 18.11 24 CL III RCP ' ` _ , r' ~ \ ° ~ ~ , DI 622 DB 620 291.30 286.00 275.00 169 0.0651 0.28 0.09 0 9 ~ I ~ / r i !f f ~ ' II+141;' I f + i r ~ ' r f i ~ ~ ` ~ /l4.r + ~ 1' ii iI Iril ili t + I r f f' i f
o i I r- ~ ~ ~ ` 0.0674 18.11 24 CL III RCP p ~ (k \ tz~ a/ ~ r ~ + r 1 ~ i + I ~ i i 11 if ii + ii
DB 820 FES 619 278;32 275.82 274.00 27 ~ o r ~ ~ - ~ ~ ~ v i b \ ~ ~ \ \ `v ~~j ~ ~ ~ Div ~ ISi r ' i 1 ' + ~ + I 1 i ~ i ~ I i I i v ~r__ !k ~i~ / r if; i, rl i it+i i r t if r + I ~ i t
NOTES: ° 1. RAINFALL INTENSITY, Ito = 7.22 1N/HR ~ /,~i ~ y\ i ,
\ ~ I 2. SEE SHEET 7 FOR STRUCTURE DETAILS. _ II ~ I ~ _ _ O i IIj~~ I I f ! ! + I i + 1 I If I ~ I I 11"1' II 1 i / r~~
~d , c r ? ~ I DITCH AND SWALE TADLE a~+ r = ` r, ~ ~ r r i t
,y ~ i ~
C Q10 SLOPE VELOCITY NORMAL DEPTH ,r i r ~ TU SECTION DRAINAGE AREA IMPERVIOUS AREA RE A N.A.G. LINING rti, ` _ _ ~ - ~u~ ' ~A / 1 + 1 i I t +fi 11 + rn i ills ,I1+ Ii+i~~~_,I I 1 t
DITCH o ~ /i \ t--__~--_ FROM TO [ACRES] [ACRES], [CFS] [/o] [FITS] [FT] r ~ ° / ~ p}-IAS~ ~ i~~ 1 ~ '~i L~ ~ , 1 1 + t I I i I I ~ ~ + 1 ~ i ~ ! r fir / , I II I + j/1 !r it
B3A B3 1.06 0.29 0.44 3.39 3.07 3.48 0.53 S75 a' r„ rr r r ; ~ ~ i r____.•_.~~ i ~ , i , I 1 + I III , t t f~i ! ! / t /
.1 0.26 S75 ~ „~r \ , / ~ ~ B3 B4 0.19 0.07 0.53 0.72 6.70 3 6 ,~r~. ~ ; , , ik~, i ~ ~ ~ li _ ~ ~j ~ ~ ~ / I + e + I + ~ t I I Y(, v ~ I I ~ i i r ~ / /r l i TRE~~ 1 / ~ ~ I ~ ' + 1 + ~ t S + I ~1 A ~ ti1 1 I ~ J f I 1
B4 B8 ~o ~ ~ . ` PROTEC110N ~ ~ _ ~ ~ q, j rRWG1+'I'~i ~ ~i v v wv~ v v litJr~""~ i tr ~ f j ~ i ~f._._._ _ _ _ i MI I y 1 + ~ h v i v iir! 1,--° ~
0 57 0.53 5.50 1.70 3.14 0.71 S75 ~ ? ~ << r `i__ ~ _ ~ ~ ~ B B5 B6 1.44 $ 'FENCE (TYP) ' ~ ~ ~ ~ / ,.F'-':~`/ -...c""->- I + t ~ I I qtA ~ ~V +II! Il~~_ + i ~ _ ~ ~ ^ ~ 1 1 ~ 1 ,~N 11
0,48 4.99 3.40 3.98 0.64 S76 ' \ _ _ \ ; , r ~ ` Ik ~ r j - ~ ' r- -.T. , \ ~ I I+} n~~ ' BOTTOM OF ~ _ _ i...Tf 1 f+ f ~ll IiII ~n+i~~ EXISTiNG GASIN 3
B5 B8 1.43 0.48 _ _ ~ j (~J(( I / j f;r...._.,,._ f ( i f /i H 11 1 ~ ~ OVE' ~ i r i + I i f ~1 r lI I yu ly MAY 8E L044ERED
\ r. ~ ; B9A B9 0.50 0.16 0.47 1.69 3.07 2.92 0.41 S75 _ _ yet r , ~ I\ ~ ~ i / r EJ(I$fi~dG ~ ~9 ~ ~2~'~ ~ b~ r'``~ ~~i~~~ TO Atl01N POSITIVE ~
0.47 0.61. 6.70 3.04 0.24 S75 ~ r`r /'-_1 r ~ i \ 2k `,j 89 C5' 0.18 0.06 - - 2 ' ~ ` j~~*NS~, Pj ~ I FEPjCE , , - - , , , f ~ ~n DRAINAGE FROM DI - ~ ~ ~ I + 1 +S,~f~} i ~ I~A~~ ' 622 DURING O
C1 B6 0.14 0.06 0.57 0.57 1.70 1.78 0.3 S75 - ° _ ;`''-r - ' _ J f ~ E/ j ~ I'fkf~ / fr rr y~`f CONSTRUCTION / ~P, ~ s ; , , , . r ~
\ i ~ + ' may. _ ' ~ ~i ~~e ! ! / / / / / ' / ! 1 1 f 1 ~ ND ~ r r f v v ~ fJ,J
C7 C2 0.13 0.05 0.50 0.45 4.26 2.38 0.23 S75 ~ ~ u~ _ j ~ ~ r ? ~ - I i t' 6 ~ ' $ ~ - ~ ,1 j AND' T FttJ,~/~1'v / / r \ } \ \ \ ~
: AO 3.12 0.22 S75 ~ 3s I ~ ` C2 C3 0.12 0.06 0.61 0.52 8 I' 1 ' °0~ ~ \ ` t L° ~ i ~ - - ~oo, - SS E~(IS N~ AS N ~
C3 C4 0.26 0.10 0.51 0.97 6.70 3.41 0.29 S75 I\ ~ , ~ ~
~ ~ - ~ ~-_.r-,..._ z ~ ~ O ~ ' o
1. N DENOTES NO LINING NECESSARY. ~ ~ !
X • J - i ° y^ 2. ALL DITCHES ARE V" SHAPED WITH 4: t FRONT SLOPES AND 3.1 BACK SLOPES, PER ~ _ _ _ ' i _ _ 1 ~ ^ I ' l ¢ 4~// ~ ~ ~
WITH THE EXCEPTION OF DITCHES G AND H. ~ i ~ _ ~ TYPICAL SEC110N IFlCAIION. USE OF EQUIVALENT ` ° _ i~ i~ ! i \ ___v - w 1.
3. SWALE LINING REFERS TO NORTH AMERICAN GREEN SPEC PRODUCT TO BE APPROVED BY ENGINEER AND WAKE COUNTY ENVIRONMENTAL SERVICES. _ , Ir j~~~\\ * - C ~ , TION!/ / i r~ / `q l ~K ~ / / /r r' 1 r ! ' ~ ~ / / ! O
4. SOD WILL ACT AS APPROPRIATE SUBSTITUTE FOR ANY AND ALL LINING MENTIONED ABOVE. \ ~ ~ ` i ii ii P~?.O- , ~ ~ ; 1 \ - - "FENCE , ) WV ~ \ ~ G. y ~
~ s ` ` i ~ alb
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DENUDED AREA - 2.6 ACRES / y+~ % 7,°-' , i ; ~ ; 3 / i i i ~ ! i ~ i~~~ - r Ij ' i ~ f ~ r
I ~ ~ ~ . i i ! I f .1 I / i ~ T / / / ~~s>~ ~ I I f f /
_ ; r~ it I I 1 ~ ~ ~ ! V ! j ' r !i'i
ER0510N CONTROL NARRATIVE \ ` \ ` \ . ~ ` - - ` ' / v ` v ` v ~ / ` ~ P~ S - ~ ~ I I ..1 !l j ~ i 1 /l ~ ! ~ ~ v i// //i ~ ~1 / ~ ~ j i 11 j~ ~+--1' 11".. ` ~.-I
EXISTING DIVERSION DITCH TO ®ASIN~ 4 \ v _ ~ V]~ v r ~ ~ THIS 7.99-ACRE SITE IS LOCATED ALONG THE SOUTHEAST SIDE
OF JOHNSON POND ROAD IN SOUTHERN WAKE COUNTY. THIS NTS ~ , ~ , \ - \ ISTII~f'~ 1\, 1 a 1 r \ \ \ i `"`J~
PHASE IMLL CONSIST OF 17 SINGLE-FAMILY ? LOTS AND 658 LINEAR FEET OF PUBLIC STREETS, / _ ~ ~ ~ _7 1'°- ,c'~. T ~ . ' i / r! l1 ! I r ! r' ~ - T l f 1 ' ..w--~ ~ i I I I ~ I
CREEK IN ~ ` ` . v v ~ ~ r ~ °v v ~ I , , _ _ ! ` \ ~ C~^~- °J~ ~yp_A_I_~__ / r / ' `7 , ~~y~- ~ILNrfY $~MENy ~ ~ M \f + Y i~ \ ,
RUNOFF FROM THIS SITE IS TRIBUTARY TO MIDDLE A NOTES -EROSION CONTROL , ~ ` ~ ' \ \ ~ ! \ ~ / GENER L , , \ , ~ THE NEUSE RIVER BASIN. ~ \ - ~o , ` \ \ ~ \ _ r Jr-
1. ALL LAND DISTURBING ACT1VI11ES SHALL 8E CONDUCTED IN ACCORDANCE WITH ~ , ° \ \ \ - _ ~j2 / r t Q - y. U T~~.._.T._,_ _aj f r
NTR D BY THE USE OF CUSTOM ~ ~ \ \ \ \ \ ~ ~ \ \ / ~ SEDIMENT RUNOFF IS TO BE CO OLLE A IM NTATION CONTROL STANDARDS AND \ ~ ~ ' ~ ~ ~ _ WAKE COUNTY SOIL EROSION ND SED E \ ~ , \ ~ ~ \ ` ~ ~ _ ~ BASINS, TEMPORARY DIVERSIONS, SILT FENCE AND OTHER PRACTICES. ` \ ` ` ~ ~ / ' / / ~ - / / f+ 1~ yfl I C~~rR(V1+/r10 ! / j ~ + '~i
MEASURES AS SHOWN ON THIS PLAN. l1 ~ i',• _ ~""n~ / ~ i +rlr~~ ~ 1 I/ ~NTR/1N4~~ j~ % + ~ `~'~~il~f' 'fl f' 'l \ i'// 'Tfi~ l/ i+'1*I ` / 'f ~ 1 / ~ / / ~ I ~ v~ I
2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTAINING ALL TEMPORARY ? \ ~ \ `~1 r 1\\\ \ ~ i l f f' , / ! 11 ~ \ 1 irl ! ' /l f / 1 / / ~ N I
FEMA F1.00DPLAIN ON THIS PROPERTY IS SHOWN PER FEMA FIRM MAP # SEDIMENTATION AND EROSION CONTROL DEVICES SHOWN ON THE APPROVED ~ t~ \ \ \ / ~ ~ \ \ ~ ? , ' 00 . PLAN, s ~ ~ \ \ \ ` / ' , \ °,e, \ - I r / 37200fi8800J, DATED MAY 2, 2 6 ~j -t f I x'"~ r'",•''~ /~~J~ii i 11 / / ! I
~ ~ ~ v . r ~ ~ r.. " ~ .~R Ll~ r
AREAS DISTURBED DURING CONSTRUCTION SHALT. BE STABILIZED WITH \ ~ r - , EXISTING CUSTOM BASINS ARE TO BE BROUGHT UP TO DESIGN 3. ALL , \ ~ , I , TEMPORARY SEEDING AND MULCHING WITHIN 15 WORKING DAYS FOLLOWING ~ \ \ - - ' ' ~ , r,. J it I + f , t
STANDARDS AND THE SILT FENCING TO BE REINSTALLED. COMPLETION OF GRADING. PERMANENT SEEDING, MULCHING AND GROUND ~ ~ \ ~ ~ V, l J - - r ,\I"? \ ~ - - _ J _J / ~ ~ , - / / - Y 1 f/ VV QQ~t.-.-.{-._._ _C_VI'[y t f 1 G.R~
COVER SHALL BE APPLIED TO THE SITE FOLLOWING COMPLETION OF ~ / ~ ri~ \ _ ~d1 CONSTRUCTION SE UENCE cQNSTRUCTIaN. ~ . 2 , m, ~ ~ ~ ^`__l - i~""' / I~ ~ t~ ,N1 f! ~ !1! E~1~i71 N 4 / I f 1 I ~"'--ate " v ~ ~ ~ ~ it / ~ r a If~~ .g y ! II ( J
~ 4. SLOPES SHALL BE NO STEEPER THAN 2:1, PREFERABLY FLATTER, FOR ~ ~ ~ / ` ; , s~` \_ZO+ o - _ ~ 1. OBTAIN A LAND-DISTURBING PERMIT. SCHEDULE A PRE CONSTRUCTION VEGETATIVE COVER, ~ V ` ~ / ~ i~ ~ ~ 1 p ~~-w...~w-...---•.. ~ ~ - sv* _ ~r_^_^"' Q,~ JI + ~ l l 1 r ~ ~ I } I
r , CONFERENCE NTH THE ENVIRONMENTAL ENGINEER, JENNIFER MITCHELL, AT Qi,
919-868-8415. Z ti,~ ` ~ \ `.\~oy '~a,---. - = FA THFU Y MAINTAIN ALL SEDIMENTATION CONTROL 5. THE CONTRACTOR SHALL I LL ~ \ , / ~ i \ , ` 2. INSTALL GRAVEL CONSTRUCTION ENTRANCE, REHAB THE EXISTING CUSTOM NARY MEASURES TO ENSURE THAT SILT ` ~ r i r ` ~ - - - - -
~ AND DEVICES AND TAKE ANY PRECAUTIO ~ y ~ ~ i F, ( BASINS AND ADD POROU5 BAFFLES TEMPORARY DIVERSIONS, SILT FENCE, AM CHANNEL LOCATED WITHIN THE SITE. ~ ~ ~ ' ~ ~ ~ `~yY ~ ~ i a+0 TG~505 P~~A~-~ ! - ' ~ d- ~ + r r1 _ SS--___ r N I ~ ' i
Y OTHER MEASURES SHOWN ON' THIS PLAN. EXISTING BASIN TO BE DOES NOT ENTER ANY NAITJRAL SIRE ~ Q r/ ~ c, , ~ , _ S AN ~ I G CHANNELS MUST BE CLEAN OF SEDIMENT AND STABILIZED BEFORE \ ~ ~ ~ ~ I I r''~~ - , ? r r LOWERED 2 FT TO ALLOW POSITIVE TEMPORARY DRAINAGE FROM DI 622. THE PROJECT IS RELEASED BY WAKE COUNTY. , i t ~ # ? _ ~ - .o a.s , _ - ~a Fad ~o~ ~ ~ , + ~
M ADJUST RISER STRUCTURE AS NEEDED TO DRAIN THE BASIN. ~ ~ b , ~ ' ? '
3. CALL 868-6415 FOR AN ONSIIE INSPEC110N BY THE ENVIRONME AL g, TEMPORARY SILT FENCE MAY BE REQUIRED TO BE INSTALLED !N AREAS ~ ~ s 'I ~ t ti , ~ - N ENGINEER 1'0 OBTAIN A CERTIFICATE OF COMPLIANCE. EDIMENT BASINS HAVE BEEN REMOVED GRADED AND SEEDED. THE ~ ~ ' i ' ~ ' + ~ , ----_J_ ~ lil ~~ta , AG~ EA~EM;~Ir~~ ly ~F'~ii rr rr
WHERE S I/~Ci , ~ i / 4. BEGIN CLEARING AND GRUBBING. MAINTAIN DEVICES AS NEEDED. ROUGH SILT FENCE SHALL REMAIN IN PL4CE UNTIL GRASS IS ESTABLISHED. ` / w ~ ; ? ~ ~ ~ i i P ~ ~ ' , n GRADE THE SITE. ~ J~ ~ , r , ~ i ' t ~ i ~ rp
® ~ + ~ r ~ i , r i~ f i it ~ fl~i 11 fi i I W+II G, I ~ f r / i . ~ f ~ 1 1
a 5. INSTALL STORM SEWER AND PROTECT INLETS WITH BLOCK AND GRAVEL INLET 7, THERE ARE NO DESIGNATED AREAS FOR BORROW OR WASTE ON THIS PLAN. , ` ` i ~ i ~ ~ ~ ~ i ~ ~NT TRAPS OR OTf~ER APPROVED MEASURES AS SM9WN 4N ~ ~ I ` ~ ~ ' + ~ I ~ , ~ ' ~ CONTROLS, SEDIME ~ EXCESS TOPSOIL OR OVER WASTE MATERIAL SHALL SE MAULED OFF~SITE. ~ , ~ , i , I
° TH15 PLAN, BEGIN CONSTRUC110N, BUILDING, ETC. STOP STORM PIPE OUT NO BORROW, WASTE, OR OTHER GRADING ACTIVITY SHALL OCCUR OUTSIDE ~ I \ ri r, ~ , \ ~ r ~ i i ' ;
o OF DI 622 SHORT AND DITCH STORMWATER TO EXiS11NG SEDIMENT BASIN. THE DESIGNATED LIMITS OF CONSTRUC114N. ~ r ~ ` ~ ~ " ' /r i ~ ~ ' ~ ~ 1 ~ r , T3 6. STABILIZE THE SITE AS AREAS ARE BROUGHT UP TO FINISH GRADE WITH ~ ~ + ~ \ ~ r r ; ~ ~ I i ~ I ~ ~j~ I~ ~ i r ~ r! ~ ~iMiTS ~ ~yi ~ ff y
~ VEGETATION, PAVING, DITCH LININGS, ETC. SEED AND MULCH DENUDED 8 F~,OOD HAZARD REGULATIONS. THERE SHALL BE NO FILLING OR THE ~ ~ i I EN 15 DAYS OF COMPLE110N OF ANY PHASE OF
r ' r ' r AREA5 WITHIN FiFIT: ( ) ERECTION QF PERMANENT STRUCTURES IN THE AREAS OF WAKE COUNTY i \ ~ i I' r~ i f + ~ ~ r
a CONSTRUC110N. FLOOD HAZARD SOILS OR FEDERMAL EMERGENCY MANAGEMENT AGENCY , ~ ~ ~ ~ ' E ] j 1~, v , t ' ' ` ~ ~ 90' ~ ? EN CONSTRUC110N IS COMPLETE AND ALL AREAS ARE STABILIZED ~ ~ r \ , , / ~A 7• ~ (FEMA) 100 YEAR F1.04D ZONES UNTIL A FLOOD STUDY IS APPROVED BY ~ ~ r ~ " ~ ~ f r 9 r . SE r i i'~~~ - 11~ I ~II f ~i//~ ~ ~ i r ' ~ ~IY 1 ~ 1"GMt'1 NNVJ IGa~1
NTAL ~ ` ~ ~ C r r a COMPL£IELY, CALL 868-6415 FOR AN INSPECTION BY THE ENVIRONME WAKE COUNTY AND/OR FEMA. BEFORE ACQUIRING A BUILDING PERMIT FOR ~ ~ ' i ~ ` + ~ ~ ' r X? ~ r ~ - - - ~ ~ i ~~v i rr EXi ' ~ Q~t ~ ~ FLOOD LIMITS
o ENGINES LOTS OR OPEN SPACE MARKED BY AN ASTERISK), THE BUILDER MAY t , ~ ~ ~ I _ ~ / r r ~?'SE II- ' 6. IF SITE IS APPROVED, REMOVE TEMPORARY DIVERSIONS, SILT FENCE, CUSTOM ( ) ( ` ~ ~ i r ~ 1 , r ~ 90 ' C 90, i, ~ " i r ~ ~ ~ _ I ~ i rr ~ ' i~-__ MI DS ~ ~'`i I
NEED TO OBTAIN A FLOOD HAZARD AREA USE PERMIT FROM WAKE COUNTY \ r ! ~ r~~ + U BASINS, ETC., AND SEED OUT OR STABILIZE ANY RESULTING BARE AREAS. ~ T. " l l 1 ~ r ENVIRONMENTAL SERVICES. 1HE BUILDERS ENGINEER, ARCHITECT AND OR ~ s ~ \ ~ ~ 1, ~ ~ '
ALL REMAINING PERMANENT EROSION CONTROL DEVICES SUCH AS VELOCITY ~ r ~ a ~J i r,- ~ , , ~ ( , o DISSIPATORS SHALL BE INSTALLED. ~ SURVEYOR (AS APPROPRIATE} MUST CERTIFY THAT ALL FLOOD HAZARD it t ~~I \ ~ ~ ~ ( , ,UI I~ , I
y i , ~ ~ 0 9. WHEN 'VEGETAl14N HAS $ECOME STABIiIZED, CALL FOR A FINAL SITE REQUIREMENTS ARE MET. rr ~ ~ ~ \ , ~ ~ w ~ I ~ / I RfV E DRAINA E EASE ` ~ w,
w N7A ENGINEER JENNIFER MITCHE AT INSPEC310N BY THE ENVIRONME L LL, ar} I ° ~ ~ ' ~ I~? a~j`~l I 1 ~ i ~ i ~ r ~ ~ > ~ ~ ~.NT~ ~ X3,1 --2~,_ - 1vv ~
~ 919-868-6415. OBTAIN A CERTIFICATE OF COMPLETION' ° ~ ~ , \ ~ rr 1°° - w ° ~ ~ ~ ~ ~I ~ ~ I;- Iw ~ w ~ ` \
'~f I~~ ~ ~ \ 1 _-~EME V4E1~.AND~ ~
®NTROL LEGEND ~ ,`~h_ _ ' I ? EROSION C ° / I
~ A 1 ~ - f~~.
FILTER BASIN ` ~ ' ,I,, A r s f
. iii ~ ~ ~ ~~/t/ ~ ~ d. ~ _ I i v1 ~ ~ i+~ ~ +t lm
Z ~ g ~ . ~ TEMPORARY DIVERSION ° w R. ~ goo' -=42.a8~ SS ± ice; _ - ,.1..0_ 'i ,d I '
i~ - ' 0 0
o TEMPORARY SILT FENCE 0~4~~94~A~ ° ,a~°°~~°,,°°°°°°~G °°°o, Q'~
~ RIP RAP CHANNEL DISSIPATOR ~ o ssro° 9°°,0
Z
U TEMPORARY SWALE LINING O ~ O O jj~~~MI ° ° 0 °
m '~E 1' ~~~f ~ e °o r GRAPHIC SCALE
v ~ TEMPORARY CHEC4C DAM ° y ° lao ° GiN~ °°ec~,~o° ~o o ~0 60
e ~1~'It~tfG1SAIVI~ST~RPu1~~A`(C?~~'d~~ °°a CP~oO~' °°OaQO 00 96a6p6 t inch = 60 ft.
° GRAVEL CONSTRUCTION ENTRANCE
L °°a°0°° P b
i
No. Revision Date B Designer Scale rt3R'h I GH'TO N' FOREST Sheet No.
a ° A PER WAKE CO. & ToFV COMMENTS 7/27/11 GAS W&R AS NOTED " o Drawn By Date
o B REVISED SETBACKS PER ToFV 8/26/11 NJA GAS 3 8 11 C REVISED LEVEL SPREADER PER DWO 10/11/11 NJA NJA /z G RA Lj INU &E R " 0 P"HA S E v*v" I rb"" EROSION CONTROL PLAN WITHERS & RAVENEL ENGINEERS I PLANNERS I SURVEYORS
o Checked By Job No. 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832
JEC 2020179.30 Fu ua-Varina Wake County North Carolina a 0 gnaw
Y

~ ' ' ' / / I ' i I ' I I r / i / , X. \ y ~ ij I ~ I I / / 0~ SLOPE ON TOP OF GUTTER
~'ti ~ i , , / , I ! I I t I ~ ! / ! , / , ~l I f 1 + 1 / (FLAT SLOPE)
, , / / / / /I I I ~ , , I 24" CURB & GUTTER SEE PLAN FOR LEVEL SPREADER LENGTH A ~ GUTTER
, / / / , 1 ~ / ' ( I /I / / ' ' ' ; i-~ i r ~ ~3,OOD PSI MIN ~ / ~ / / / / / / / , / , O COMPRESSNE STRENGTH) w ~ / j . / l ~t / , , , 1 PSI MIN 1RENGTH) LEVEL SPREADER LIP ELEVATION=
_ f , ttt ,I - \:i DI 622.. w - , . ~ _ ~ ~ / / ~1 ~ tt tit tl i /t' , ~ 2"_4A HIGHER ExISrINC SLOPE GRATE OFFSET OVER STEPS ON DOWNSTREAM SIDE
\ ~ / r/ ' , ~t1 t / 1 I r!! / / ~ PIPE hRGM BYPASS STRUCTURE
DIFFUSED FLOW THROUGH BUFFER B B
~ / \ / / J t { ! It / Ali-'I~
, ~ ~ ~ ,
_ i / ~ A _ ~ I / i' 7 I ~ !!'+(y!! INSTALL CLASS CLASS A RIP RAP--~ T ~ ~ ,i \ ' ! - ~ ~ a~~ ;3 D ~~,i ~di ~~i,i;~° i r 3 - i~_.
T ~ ~ / ~ ~ (!f~!]~ FROM QUTLET TO 80TtOM OF FOREBAY ~ _I~ _I _ _ h Y_ ~ i \ \ . ~ 1 / , i !1 18" MAIN DEPTH, 3' WIDE - r
i ' f ~ / !!!~;l+1~ WITH GEOTE~(1LE LINER ~ i-~ ! ! ~ I S ~ ~ ~ ~ `i ENKAMAT 7020 OR
~ ~ ~ ~ 1 i I ~ ~ I ~ EQUIVALENT DOWNSTREAM I i ~.'I OF LEVEL SPREADER
~ ~ ~ ~ ' , ~ / V y i OPTIONAL ~ i ~ , ~ ~ ,A / t y 14 4" PERFORATED 4°-s° ~s7 wnsHED sroNE WITH A 6" PRECAST CONCRETE
~ i ~ `'.r 1 , ' / I PVC TO DAYLIGHT ' ~ r' , ' ' ' i00 YEAR FLOODPLAIN NoN-wavEN FILTER FABRIC TOP SLAB WITH GRATE WRAPPED AROUND STONE
„ \ , PER VATHERS 6c x Y / 1 ~ / ' ~ ~8®" ~ J / RAVENEL FLOOD STUDY
y; , ''`v; , I I ~ I TYPICAL FOREBAY/LEVEL SPREADER DETE 'READER DETAIL PREGAST REINFORCED BOX
~ i ~ ` ~ \ i I I , / / , I, i
~ ~ / / / / ~ '~,i ? I ~ i ' ~ / ~ I I
~ ~ ' ~ ~ ~ ~}~'~y`/'~ti;. ~ ~ ,
y ~ ~ 1 , TOP SLAB DETAIL
3`0 ENGINEERS .l ~ J NT5
•Y' ; ®417 / / . > . e
_ ®YPASS ~FI N _ ,FL i - p/~~ 9ARY .fh i 'X (SEE.DETAIL)11 11
ELEV - 278.50
- - i _
~ - % - i--'~ e 12" DIP \ 1
~r - - SPREADER L1P MIN k ~ 2'
` ~ ELEV 75.00 24" RCP
t f / , j 4 \ / / / ~ \
~ ~ i
~ L'+~l / ~ / / ~ 5'
~ ~ _ f / / , / 2' 1 ~I, , ELEV - ?.76.00
''9. ''rte / j / ' ' t
/ y ~ I / M 6.25 24" RCP DIP
~ \ ~r I > + Q1o= 15.4 cFS _ 1 "THICK CLASS B RIPRAP / t I j I I/ 8 , \ ~ / ~ I V= 6.52 FT/SEC _ ~ TO LEVEL SPREADER
\ / , + I ~ - WITH FABRIC UNDERLINER . ~ \ ELEV - 275.00
A Y
.~'l, ~ t ~ , / / / /
, , / y I"i4v
' ~ / I POURED CONCRETE INVERT
~ f ELEV - 274,00
~ /tl ~ / i / ~ ~ I APPROPRIATE GRASSES FOR ENGINEERED FILTEf IGINEERED FILTER STRIPS BY REGION
/ / 1 " T ~ / M / / i+ t,~, / ~ I REGION APPROPRIATE GR 1 1PPROPRIATE GRASSES
MOUNTAINS BLUE GRASS, TA' 3LUE GRASS, TALL FESCUE
PIEDMONT TALL FESCUE, C( 'ALL FESCUE, COMMON BERMUDA
SCALE: 1 "=34' COASTAL PLAIN CENTIPEDE, CCM~ ',ENTIPEDE, COMMON BERMUDA LEVEL SPREADER S P A TT E R~ O X (D B~ 2 0}
SECT 0~1 A-A NTS
START UP FERTILIZER APPLICATION TO THE ENI iION TO THE ENGINEERED FILTER 5~TR1P TOPSOIL
IF OBTAINING A SOIL TEST 1F NO SOIL TEST IS OBTAINED
I # OF ~ CALC. USE OVERFLOW MIN. LS IMPERVIOUS FOREBAY
LEVEL LOCATION Q10 Q1°'1HR INVERT DIAMETER SPUTTER SOX DESIGN INFORMATION SPREADER ORIFICES HEAD HEAD ELEV. LENGTH AREA AREA Send approximately 1 cup of the air-dried APPIY Apply the following for grasses other than 6" SLAB TOP (SEE DETAIL)
soil sample to the NCDA & CS Agronomia Centel centepede*:
# [CFS] [CFS] [FT] # [IN] [FT] [FTJ [FT] [FTdCFS] [ACJ [SF] Division Soil Testing 5srvices, 1040 Mail 75 - 75 Ibs of ground limestone per 1,000 sf ELEV - 27$.50 PRECAST REINFORCED BOX
Service Center, Raleigh, NC 27607. Boxes - A starter type fterilizer (one that is high in WITH 6" THICK SIDEWALL
1 DB 620 18.4Q 2.56 275.00 1 12 0.5 0.5 276.00 25,5 1.49 130 USE 1 ~ 121N DIA. ORIFICES} OVERFLOW AT 276 FEET and forms can be obtoined at your aounty - A Cooperative Extension center or at the phc phosphorus} hosed on the type of grass and ~ the planting method. Fertilizer bags have a 5'
Agronomic Division office in Raleigh, Allow the several weeks for the results to be thn three-number system indicating the prmary
returned. nut nutrients, such as 8-8-8 or 5-10-10. These
nur . , i y - Apply the amount of lime and fertilizer per numbers denote the N-P-K ratio -The percentage of each nutrient in a fertilizer. The
• ~ ~ ~ recommended for your sail by the soil per percentages are Hated in the following order,
testing loboratory. N N Nitrogen for green color and growth 24 RCP
Pz0 PzOs Phosphorus for good rooting
Kz0 Kz0 Potassium to enhance pest and environmental stress tolerance TO BYPASS CHANNEL ~ 24" RCP
43" MIN. SLAB TO BE COUNTER • SUNK t" IN DEPTH Coma
UNDER HANDLE i far a Common examples of starter fertilizers required .et~----°-'-"'"' far a 1,000 sf area include 40 Ibs of 5-tp-10,
u 3(4' R 3!4" f~1SM00TH BAR 20 Ib; 20 Ibs of 10-20-20, or 16 Ibs of 18-24-6. For ELEV - 276,0 INFLOW
Z ~ sandy Sandh J sandy soils, typiaa! to the Goostol Ploin and Sandhills, fertilizer rates should be increased by
I 20 pe 20 percent. 12" DIP
Z ~ _ 11 a I I I 2.3" x i/4 TK. ROUND OR M t
z SLAB * For centipede gross, apply 1~2 Ib of nitrogen per 1,000 SQUARE CUT WASHER ~ ~ a >gen per 1,000 sf, Too much fertilizer will kill centipede, ELEV - 275,00
o ~ I•IANDLES 2 HEX NUTS
i"DIA. = 3" PIPE SLEEVE (TO ALLOW . ~ 12 HANDLE TO MOVE FREELY
r } 4 PRECAST CONCRETE SLAB 4" PRECAST CONCRETE SLAB POURED CONCRETE INVERT
A N M D~i'ABL OF HANai.E
8' ELEV - 274.00
PPECAST CONC. SLAB
o PRECAST CONCRETE SLAB WITH N° ~ 6" Q.C. E,W. o a" a" OPEN ALL 4 SIDES OPEN ALL OPEN ALL 4 SIDES
a ~ WEiR ELEV
a m EXISTING v .~%L~%L/_.L ~ WEIR ELEV'
r- ~ GRADE A ~ C .•~i,@•°•@~v b,', ~ 9'r@, r,@• .•,@ • dr ~ v ,d o..a'6 ~'.a'Q'e !!'tea. ~ I~iQt}RSE ~EVEI~ SPREADER SPA TIER BCX (D~ X20)
3 EAa ~'@, a •a ,a w.? aa'@/' ~ @~ ° .aAa , @ DI 626 4 296.5!3 4 •@ °
6" PRECAST , C° O DI 624 4 298.33 4 C G` SECT{aN D-B NTS
° ~ @~ NoT~: CONCRETE WALLS © °@ d m EITHER SOLID 9RICK, SOLID
~ ° " 4r BLOCK, OR PRECAST CONCRETE
z ~ ° 35 M3N. w MAY BE USED. ~ A
O ®a ° N ~ ~ a," a GUURSE Q CONCRETE WALLS TO BE 6"THICK.
° ° a > T P UIRE 1 ' @q ~ prf S E SREO D~ 6 O.C.
THROUGHOUT WHERE DEPTH ~ RCP '.@° >.@' RCP a ° d, EXCEEDS 5'. iN RCPT`
I : e~A ° PIPE OUT
_ ! 3, 6 a 4' USE ONLY 30p0 P.S.I. CONC. Mlx,
a° a
~ Z o••.@ a, v.•.@ a • ~ , ,@ a • a, ,@ • ~ iD t @~}•aI': @~1• a.' .@/f°c. a b :•v@•,@°°a, o.<.@ ' a, 4 ~n MiN 6" MIN
°ppp00p00gp°p
o NOTES -YARD INLET WITH CONCRETE SLAB TO BE BUILT TO SEE STORM DRAINAGE Ch ~M DRAINAGE CHART °°°°~(~~~°9CAR~~/ °
PLAN NOTE: lNS{DE D(MEN510N FOR 24" PIPE PR®FILE a TOWN OF FUQUAY-VARINA STANDARD DETAIL B.Ot SHEET 4 FOR DATA FOR DATA oo°~ o ~~~SS/,~°°° °o ° p9 °
i AND UP USE PIPE DIA. PLUS i2" z 0 U 9 ° Q~ °
A ,D
U STD. No, Y ~ I ° 626 a ° GRAPHIC SCALE ~D ISLET DETA~ ° ° ° d °
~ T TH E L A N $.01 N T5 NTS °p n' ~F-o ~Q o° 30 0 15 30 60
0 SECT oN a-g ~^A°° UII`~~9 o° \ °aP O°°9° l °°0 ~ G °°0 °
I °p00p~ i aop°0° 1 inch = 3p ft
r
m
M
m No. Revision Date B Designer Scale N Fu" R E S T A PER WAKE CO. & ToFV COMMENTS 7/27/11 GAS W&R AS NOTED BRIUriTU Sheet No.
0 B REVISED SETBACKS PER ToFV 8/28/11 NJA Drawn By Date
r S T( D R M ru"N R, SPREADER PER DWQ 10/11/11 NJA NJA GAS 3/8/11 r"ASEV D C REVISED LEVEL Checked By lob No. DRAINAGE DETAILS WITHERS RAVENEL ENGINEERS I PLANNERS I SURVEYORS
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832
JEC 2020179.30 aqua-Varina Wake County North Carolina N 0
X