20001061 Ver 2_Certification of Completion_20100915

WITHERS &' RAVENEL
ENGINEERS I PLANNERS 1 SURVEYORS
-iii MacKenan Drive
CARY, NORTH CAROLINA, 27511
[phone]
FAX [phone]
To: NC DENR
NCDWQ/Wetlands Branch
2321 Crabtree Blvd
Raleigh, NC 27604
WE ARE SENDING YOU
? Shop Drawings
? Copy of Letter
? Approved as submitted
? Approved as noted
? Returned for corrections
LETrEQ OF T° ° NSMMAL
DATE 09-14-10 T 7 !o. 2100018.21
ATMNnON Annette Lucas
PHONE # [phone]
RE: Hasentree Phase 6, Pond SCol
DWQ Project # 2000-1o61v
Count : Wake

the following items:
? Specifications
COPIES DATE NO. DESCRIPTION
1 09-14-10 Certificate of Completion (original)
1 09- 1 /10 As-built drawings
1 Copies of permit and design plans

N

THESE ARE TRANSMITTED as checked below:
? For approval
? For your use
® As requested
? For review and comment
? FOR BIDS DUE
REMARKS: An n ette,
11??Ii.NR:•f.?n1c4t1v11Fi..5. nW.Vn!i?Wt'1Y
R}fJ Fc?u????Mn' ?W 4O?1'/i?i.lf 3il?WyY1?Y(??
? Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints
20 ? PRINTS RETURNED AFTER LOAN TO US
Please find the attached Certificate of Completion and As-built plans for the above referenced
project as requested. For reference, we have attached copies of the permit and design plans.
We trust this completes required work under this permit. Please advise if you need further information
and thanks for your continued assistance with this project.
Glenn Phillips, PE, ESE of North Carolina, PC
John S. Poe, Toll Brothers
COPY TO: Ryan Switzer, Toll Brothers SIGNED: Hunter C. Freeman, PE/Dale Werenko, PE
® Attached ? Under separate cover via
? Prints ® Plans ? Samples
? Change order ? Diskette ?
ff enclosures are not as noted, kindly notify as at once.
,• ,
DWQ Project No.: 1-600 " 106
Applicant: . d
Project Name:
County: LAVE
(, Se-,d N
Date of Issuance of 401 Water Quality Certification: DkIW*L-16, 1°O9
Certificate of Completion
Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer
Rules, and any subsequent modifications, the applicant is required to return this certificate to the
401/Wetlands Unit, North Carolina Division of Water Quality, 1621 Mail Service Center, Raleigh, NC,
27699-1621. This form may be returned to DWQ by the applicant, the applicant's authorized agent, or
the project engineer. It is not necessary to send certificates from all of these.
Applicant's Certi ication
I, y 4 hereby state that, to the best of my abilities, due care
and diligence was used in th observation of the construction such that the construction was observed to
be built within substanti c mpliaAw and intent of the 401 Water Quality Certification and Buffer Rules,
the approved plans an s cific ns, and other supporting materials.
Signature:
Date: 9 - / V- / d
Agent's Certi cat' n
I, , hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed to
be built within substantial compliance and intent of the 401 Water Quality Certification and Buffer Rules,
the approved plans and specifications, and other supporting materials.
Signature:
Date:
Engineer's Certification /
Partial ? Final
I, I-tU+ _ G , as a duly registered Professional Engineer in the State
of North Carolina, having been authorized to observe (periodically, week y, ,fal1-time) the construction of
the project,for the Permittee hereby state that, to the best of my abilities, due care and diligence was used
in the observation of the construction such that the construction was observed to be built within
substantial compliance d i t of the 401 Water Quality Certification and Buffer Rules, the approved
plans and specificati d ther supporting materials.
Signature
Registration No.
Date a-13' 10
Beverly Eaves Perdue
Governor
_A[115?,
U EWR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H, Sullins Dee Freeman
Director Secretary
October 26, 2009
CRM Hasentree LLC
Attn: Mr. Bob Fry
8521 Six Forks Road
Suite 255
Raleigh, NC 27615
DWQ Project # 2000-1061v
County: Wake
Subject Property: Hasentree Phase 6, Pond SC=01
UT to Horse Creek [030401, 27-17-(2), WSIV, NSW, CA]
AUTHORIZATION of Neuse River Buffer Rule (15A NCAC 02B.0233) Authorization Certificate
Dear Mr. Fry:
You have our authorization, in accordance with ISA NCAC 02B .0233 and any conditions listed below,
to impact approximately 1,300 f 2 of Zone 1 and 2,350 ft2 of Zone 2 of the protected riparian buffers for
the purpose of constructing the level spreader and outlet plunge basin at the subject property as described
within your stormwater calculations received on September 4, 2009 and your application dated October 5,
2009, received by the Division of Water Quality (DWQ) on October 6, 2009. In addition, you should
obtain or otherwise comply with any other required federal, state or local permits before you go ahead
with your project including (but not limited to) Erosion and Sediment Control, Non-discharge regulations.
This authorization certification is for the purpose and design that you described in your application. If
you change your project, you must notify us and you may be required to send us a new application. If the
property is sold, the new owner must be given a copy of this authorization letter and is thereby
responsible for complying with all conditions. This authorization requires you to follow the conditions
listed below.
The Additional Conditions of the Certification are:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and general
conditions of this Certification (or Isolated Wetland Permit) are met. No other impacts are
approved including incidental impacts:
Amount Approved Units Plan Location or Reference
Zone 1 Buffers 1,300 (square ft. Application
Zone 2 Buffers 2,350 (square ft. Application
2. Erosion & Sediment Control Practices
4010versight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
Location: 2321 Crabtree Blvd., Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet: http://h2o.enr.state.nc.us/ncwetlands/
One
Naturallk
An Equal Opportunity 1 Affirmative Action Employer
CRM Hasentree LLC
Page 2 of 4
October 26, 2009
Erosion and sediment control practices must be in full compliance with all specifications
governing the proper design, installation and operation and maintenance of such Best
Management Practices in order to protect surface waters standards:
a. The erosion and sediment control measures for the project must be designed, installed,
operated, and maintained in accordance with the most recent version of the North
Carolina Sediment and Erosion Control Planning and Design Manual.
b. The design, installation, operation, and maintenance of the sediment and erosion control
measures must be such that they equal, or exceed, the requirements specified in the most
recent version of the North Carolina Sediment and Erosion Control Manual. The devices
shall be maintained on all construction sites, borrow sites, and waste pile (spoil) projects,
including contractor-owned or leased borrow pits associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must be designed, installed,
operated, and maintained in accordance with the most recent version of the North Carolina
Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. No Waste, Spoil, Solids, or Fill of Any Kind
No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas beyond
the footprint of the impacts depicted in the Pre-Construction Notification. All construction
activities, including the design, installation, operation, and maintenance of sediment and erosion
control Best Management Practices, shall be performed so that no violations of state water quality
standards, statutes, or rules occur.
4. No Sediment & Erosion Control Measures w/n Wetlands or Waters
Sediment and erosion control measures shall not be placed in wetlands or waters without prior
approval by the Division. If placement of sediment and erosion control devices in wetlands and
waters is unavoidable, design and placement of temporary erosion control measures shall not be
conducted in a manner that may result in dis-equilibrium of wetlands or stream beds or banks,
adjacent to or upstream and down stream of the above structures. All sediment and erosion
control devices shall be removed and the natural grade restored within two (2) months of the date
that the Division of Land Resources or locally delegated program has released the project.
5. Protective Fencing
The outside buffer, wetland or water boundary and along the construction corridor within these
boundaries approved under this authorization shall be clearly marked with orange warning fencing
(or similar high visibility material) for the areas that have been approved to infringe within the
buffer, wetland or water prior to any land disturbing activities to ensure compliance with 15A
NCAC 2B .0233.
6. Certificate of Completion
Upon completion of all work approved within this authorization, and any subsequent
modifications, the applicant is required to return the attached certificate of completion to the 401
Oversight/Express Review Permitting Unit, North Carolina Division of Water Quality, 1650 Mail
Service Center, Raleigh, NC, 27699-1650.
CRM Hasentree LLC
Page 3 of 4
October 26, 2009
7. Diffuse Flow (DWQ Reviewed Plans)
All stormwater shall be directed as diffuse flow at non-erosive velocities through the protected
stream buffers and will not re-concentrate before discharging into the stream as identified within
15A NCAC 2B.0233(5)
In an effort to comply with the diffuse flow provision of the Buffer Rule (15A NCAC 02B
.0233(5)), you have provided the DWQ with level spreader designs dated September 3, 2009.
The DWQ believes that if implemented, as per ;these plans, diffuse flow will be achieved.
However, if diffuse flow as per 15A NCAC 02B .0233(5) has not been achieved, then the DWQ
shall be notified and corrective actions to restore diffuse flow shall be taken if necessary to
impede the formation of erosion gullies. At no:time shall stormwater from the proposed
development be piped directly through the buffer without prior written authorization by DWQ.
The structural stormwater practices as approved by this Office, as well as drainage patterns, must
be maintained in perpetuity. No changes to the structural stormwater practices shall be made
without written authorization from the Division of Water Quality. Stormwater easements shall be
recorded for a distance of at least 10 feet on each side of all stormwater conveyances on all lots
containing these structures including future access for maintenance. The stormwater easements
shall allow for the ability to maintain the structures, perform corrective actions as described
above and shall provide protection of the structures from potential alternations by future property
owners.
An Operation & Maintenance (O&M) agreement signed by the current landowner must be
approved by the DWQ. This O&M agreement :must transfer with the sale of the land or transfer
of responsibility for the stormwater facilities and the DWQ must be notified of every transfer.
8. Deed Notifications
Deed notifications or similar mechanisms shall be placed on all retained jurisdictional wetlands,
waters and protective buffers in order to assure compliance for future wetland, water and buffer
impact. These mechanisms shall be put in place at the time of recording of the property, or of
individual lots, whichever is appropriate. A sample deed notification can be downloaded from the
401/Wetlands Unit web site at: http://h2o.enr.state.nc.us/ncwetiands. The text of the sample deed
notification may be modified as appropriate to suit to this project.
Any disputes over determinations regarding this Authorization (associated with the approved
buffer impacts) shall be referred in writing to the Director for a decision. The Director's decision
is subject to review as provided in Articles 3 and 4 of G.S. 150B. This Authorization shall expire
five (5) years from the date of this letter.
This letter completes the review of the "No Practical Alternatives" determination under 15A NCAC 2B
.0233. If you have any questions or would like a copy of the buffer rules, please call Amy Chapman or
Cyndi Karoly at [phone]. This letter does not authorize any impacts to either Waters of the
United States or Waters of the State. Please contact the US Army Corps of Engineers (USACE) or NC
Division of Water Quality (DWQ) if any impacts are proposed to either of these waters.
CRM Hasentree LLC
Page 4 of 4
October 26, 2009
CHSAjm/asc
Enclosures: Certificate of Completion
Z44
:Coleen H. Sullins
e)K
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
Hunter Freeman, Withers & Ravenel, 111 MacKenan Dr, Cary, NC 27511
File Copy
Filename: 001061 v2HasentreePhase6(Wake)NBR
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0 ~ PLAN VIEW
~ N~ Q I.UN 1N ~R~`Y ~IAT~ ~

Revidon D#6 ~ ~ A SENTREE GOLF MUNI 91' ~ ~ T
STORmWA r ER FAMILY SPORTS FACILITY LEVEL SF°F EAD JE MANAGE 1
N $ I AS-BUI:'Ll
~n wM[ CWMV NORTH VaOu 191 acKenon Drive Gory, North Cnrol p'?.7511 tek 919-469-3340 w-dw.witherstdvehddom ;license No. C-{832

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e ~ r°r \ 6" THICK PRECAST CONCRETE COVER ° t \ t \ \ \ \ ? ° ~ a °e ~'w \ t \\\\e ®e w ° 355.80 e`w\ t~ °e° °ea ° ? ``wa `a v`..,, \ > _ -°36 - a
W/ MANHOLE COVER ACCESS FASTEN CORNERS WITH STRAPS ,f , +
Cc + I f l , ~ _ e e OR SS BOLTS ! I, _ _
T CONCRETE BOX + _ =--T= PRECAS e \ ~ c• \ o\ P= 3.99+° i
S III N ALL FOUR SIDES 8" ' ~ v~ _ CLAS OPE WEIR CREST ' - 4 ~ `-i-. -_C \ ? \ _ ..eye ? ? Q5 ea a? 5t
_ ELEVATION: c'° _ _ - ~ ~°'.rF3a <r sec°-°..^,, ee ? \ e\ ? 1 F \
356.25 ~L 9.99'® \ r ^`'^^wm ° h t \ • `
_f MIN. s ~ \ 354.59 t r r r ~Pr w °°``w t t ` \ • •
THICKNESS =.~-~~-~~04..=--,~`_=J=~= r~ ~c c\~-`=~ 1 r i r ,r~r~r" S `s wwci'S w^``«„ ~ ° a. r ` -=s i_•-~-a'~`a: i. r, rr .r r - S ? `1`a ,,r9p . 1 0~ '
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- _ _ _r--_m~e~._ •`oe3~ ~ ~-~+.°°+.'~*z.... e\ S`5 r,s;,r ae° 6TV. 3aJ/.`vt;,°` ! 3 1 1~~ .°Ra °•o
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° =-==J=am a _ -fir-... _ - A Y _ ~ = _ ° s5,,~, .5X5 CO°N~RETE ~9`SER ~
2 - 6~ DIA ORIFICES ® - =--'T_ti_~= ~c „n'`.' ° t/°v~AI~"`°~ ~`s~ KITH RAISER SLAB `FOP ? ~
SIDE BY SIDE, B` APART -=__~r=ti GROUT EACH SIDE I ~ ~ a _ ~ _ _ ~ * 354.20 TOP~,BOX° 35~0~5 °

JOINT SEALED WITH A LOCK NEOPREN ~ 4 REBAR 1 _ _ _ _ =a=_=_ ~7. - ==~s~ , ¢ .9 357 t ~ ! ° ~ 387.26 * 59.Yg \v `
GASKET CAST IN MANHOLE WALL ° a . ° . 2 FT. OC _
30" i.D. '0-RING' GASKETED / ° < ° ~ ~ _ B°
CLASS Ilf RCP 353.00 ~ .a _ = _ _ ~ - , ? m>~ 60.36`\ \ ~ / ` e ~o
OUTLET PIPE EL: i ~ ~ i9 . - _
352.27 ° ` - - =~---=r- _=~~_=.~_____..=r 1 °•S I ` °t tt tt t1MAi CE
WRAP ALL JOINTS WITH ' ~ ~ . a ° - _ _ - - S we ~ . , t t t
7 OZ. NON-WOVEN • ° • • ; ' ~ ° a ° ~ - _ = ~ ~ ,5~-= °'`,,~I I PLU E D~~IN t S\SIPAT
9' X 9' CONCRETE FOOTIN - - - ~ ~ ~ S , r SEE IS \ HE t
(2,500 PSI CONCRETE MIN.j - = _ > spy \ t \ ° ~ t tS ~ ~ \ 1` \ -
o e _ _ _ _ ~ -°I`0~-0.1~=SAM ` ` - - _ _ .END ~ NG ~dALL T - t `
ICE AIL - ISE _ _ ? - _
N15 0 _ - - - -rte= - 0 1~mfma . s \ \ \ \ \ \ \
o = _ _ _ _ - = ~ = = - - ~ _ - ~ °<,•m® °°e° ° \ LEVELt` S R t g ~N~~ COU~`\
~ - ~=1 ~ _ 3Q DEAL T _ - _ - ~ NN ~ El`AIL t t t
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mac. , . ~ - _yye . - _
a
Ex. GROl1ND ND 1
` - _ =~`~1~ YP~ ~~C:HANNE~~ _ ' _ = \ ~ 4~~^ ~L~VE SRS D R
- - - - ~ , - _ - _ -II
-`III- -I ~ ~ t' ipPt. 'ti'+ _ I I I- -I I c~ 2° M~.
- ' 1' MIN. = ' t.5° MIN. 11 I- I- I® I i --I - - _ - µ - ~ - ~5 r 1 ~ EXISTING t, .s, t, t R~~-O-SE-D=LIJ~.~T_S _ _ ~,r : = ~ ° r : t f ~ t t
r.I I ° _ -I - i - Q~~~S-TDRN~~_ = - ~ ~ t ~ ~ ~ SE~MENT~L B ~ K t
-i- e I- Qt®.45.9 CFS _ I -~----=_I ~ _ _ ~ _ _ \ r : ®,1 ; , ~ 'RETA`~61NG twA L `t
C1ASS 1 R~-RJIP -III III-III-III-III-I i t BASS 1 -III I i I-III-III-I I i--I I r Vt0 : 6<1 ~1'/S 0 t e s ~ = F ~ D ~ _ _ ` i cats i ~ , t t\ t\ t\ \t iii`
d50~0.75' MIN. 1° p,~, dSOsO.75' MIN. 1.5° MIN. ~ : 9,0~ ~ i \
d
HOTS a MAY ENT Fl~ TO MI IYPACP TO VEGETATKNdB ~Y TO MINIMD~ IMPACT TO A ` x- tt tt
e - =-~-fit-~~ a t t \t \ ~ \``t a``t t\t t
L IL l L E A L D AIL ~ ~ t ` t t t t - ~
T"~AL'~UFFE ®I B~NCE
d E~PASS CHANNEL ~
_ _ _ _ _ _Tl`~~~,~~ti~~ ~ ~ tt u'gtt \ tea\ t\`< tt~ tt
ZONE 1: 1,300 S.F.
ZONE 2: 750 SBF. \ ~ " - _ _-'.'~~7~~-tz-,--~`~~\ -=Air,:------~_'.-.-.5`~"= ` \ ® * ~ t
r~r+ls cou~r FINER ~TRlP
\ ~ °-c~,- ;,~,~_,.,~-~x 1_~~`S`L~ ~ v "~'~~'-,-a~ r ~ r~~ ~ ~ 8 ~ °4 ~o-~ 9 ~ ~t,~
ZONE 1: O S.F. t tl'~` LEVEL SPREADER LIP ELEVATION 348.5 ~ ~ ~;'4 ;'L 1ty~. s ~ ~ t ~~mmmm~+t+; mm,~q~~ ~!A 9? ?1` 9 yy9
t + 4"-8"HIGMER EXISTING SLOPE ON DOWNSTREAM 51DE ZONE 2: 1,500 S.F. + 0.00 SLOPE ON TOP OF GUTTER (FIAT SLOPE) i - ~ ~ ~ ~ ~ , ~ : ~1'AT ~gy1 IP ~
SEGMENI'AL 13LOCk - . . REI`AiN1Np _ - ~~t~~ ~ ~~~aR \ ~ it t C9Ia~~~,~L~VY`~„~° ~~1 ~ ~ °
5~ WALL
\ cam"" x rf `t'~~~~ Cam, Y1. itt~ w."',~-~"__,._. ~ ° 1 1 t °a °
FiLL SLOPE NE'USE RNER EIUFFER \ :...r:S -i---:~ ~ 'C y~~~1~~~ ` ~ ~A w„ 9 1 ~t roe,
SECTION A SECTION ® ZONE 1
~r_=tom. ~z~ e t °
A B ° DIVERSION WEIR TO 15 GRASSED
LEVEL SPREADER VEGETATED
96'-C' EL: 348.50 sel~ FILTER STRIP p~ 3d" R(;p 351.17 _
~ 10~ MAX °ur gQ ELEVATION OF GRASS I ~ V°` . o
2 ! ~ 2 APRON MATCH Y°•• .wy. Y-Y'~ 1 r 9 Y' ,yam ~ ~ EXISTING ~ SCALE: 1" = 20°
_ ~ ~ 34 87 GRADE ~ Y" °V'' '~r•,y- t®®~p°
.y-
NCDOT CLASS 'B' NCDOT 'Y' , . CLASS. oSe CQMPACTEO SUBORAp ~ RIFAAP 9ND SC~C1 ~ f`iB~i PF~DER CONTRUCTIQN F~Q~ I~~NC STARMWATE q~~~r~FMrNT NOTI"P
NATURAL GROUND ND15tURBED 57 WASHED STONE 4 THICK (MIN) 1 1. INSTALL SILT FENCE ALONG NEUSE RIVER BUFFER, OR VERIFY THAT EXISTING THIS STORMWATER DRY POND HAS BEEN DESIGNED TO MEET WAKE COUNTY
ZONE 1 BUFFER) ERMAMENT GEOTEXTILE ,y.- Y' ~ ~ SILT FENCE IS IN GOOD CONDITION AND FUNCTION{NG AS INTENDED. DEVELOPMENT- ORDINANCE REQUIREMENTS. FOR 1 YEAR PEAK FLOW ATTENUATION
B UNDERLINER r 1 -8° 57 STONE ,P` ~ MI 140N GEOSYNIHETIC F RIC THICK ~ ` 2. INSTALL BYPASS CHANNEL FROM END OF EXISTING DISSIPATER PAD TO STREAM. AND "NEUSE RIVER BASIN WATER QUALITY REGULATIONS FOR DIFFUSED. FLOW
WPM 9 lAP AT ALL SEAMS ~ 3. INSTALL LEVEL SPREADER SCALE AND LIP TO RIPARIAN EUFFERS° ALL CON UCTION DISTURBANCE WITHIN THE OF R
SECTION C L SP CSS SE 4A ~ ~ Y' ~ 4. REMOVE EXISTING RIPRAP OUTLET PROTECTION WILL BE REVEGETA'(ED TO RIPARIAN BUFFER STANDARDS. 5. INSTALL PLUNGE POOL ENERGY DISSIPATER AS SHOWN qN PLANS
E 6, TA6ILIZE ALL DISTURBED AREAS
7. CONTACT WAKE COUNTY FOR FINAL SITE INSPECTION VEGETATED FII:TER STRIP NOTE>
'Y' TO LEVEL Y- 8> UPON APPROVAL FROM WAKE COUNTY, REMOVE SILT FENCE FILTER STRIP TO BEG SED EVENLY AND LEVEL PERPENDICULAR T FLOW.
SPREADER J ~ SLOPE SHALL NOT EXCEED 10~ PARALLEL TO FLOW AND SHALL BE CONSTANT
A ~ , 34S.5o .n ALONG ENTIRE LENGTH OF WIDTH OF LEVEL SPREADER. FILTER STRIP SHALL
~ It 1 BE SODDED OR SEEDED AND COVERED WITH NATURAL COMPOST" UNTIL It i VEGETATION IS WELL ESTABLISHED.
~
P ~i v r;L: tl1 MAINiffENANCE + ~~;h~ ~ a, CV
NO' 351.17 iv 3~pBOO ~d-~ fNSPECY YM8 LF'L SP~Eft Alm &VER'+P RAINFALL UNttt VEt'A'MbN 19 YADUBMEID 'y' .y~•^ A~, NOTE.
AND PROPERLY MAKE ANY NEEDED REPAIRS. AFTER THE AREA HAS BEEN STABiUZED, MAKE PERIODIC INSPECTi4NS AND KEEP VEGETATION IN A HEALTHY, ~GOROUS CONDmONB AS-BUILT SURVEYING CiATA PROVIP~ED BY:
347.7 ,r' CHANCE SURVEYING COMPANY
a RcP :1 ~ 2:1 v- ~a.~vana~ airs 591 3p' 6900 FIELD HILL ROAD
C N SPECIFiGt10MS ~ aai• ar SSE ~var~a RAI 1. THE ~ITtI~ SHOULD BE A MINIMUM OF ~ FEET WIDE EXPENDING 8 INCHES OVER THE UP AID ~ ~ RALEIGH, NC 27603 999-3295795
I BURIED 6 INCI~S DEEP IN A VERTIGU. TRENCH THE LOWER EDGE. THE UPPER EC~E SHOULD B11P' AGAINST SMOOTHLY CUi SOD AND ~ SECURELY HELD IN PLACE WIP}i CLOSELY FACED C
HEAVY DUPY WIRE STAF'I.ES AT LEASE 12 gdCHES LONG. ~ ® i ! P ~~C1 TL NINIARY ~®®o~aaee®®® °
2 ENSURE THAT THE SIRtFADER IS LEVELB FOR UNIFORM SPREADgVG OF STORM RUNOf~ 3. CONSTRUCT THE LEVEL SPREA~R ON UNOLSIURBED SOX. NOT ON Fill ~
~ iv 4. CONSTRUCi A 20 Ft~f TRA1dSlDON SECilON FROM TIC EL TO BLEND SMOOTHLY WDH 1HE WIDM AND DEPDI OF THE LEVEL SPREADER. DIMENSIONS ELEV. Peak Water Freeboard ~°°®p~~ ~ ~ARdei
~ 5. DISPERSE RUNOFF FROM THE SPREADER ACROSS A PROPETE.Y STAENLIZED SLOPE, NOT TO IXC® PC t~', MAKE SURE THAT THE SLOPE S SI~FTCIENiLY SMOOTH TD KEFP THE FLOW FROM CONCENTRATING. EgOER UP - CONSTRUCT THE LEVEL UP ON UNDISTURBED SOIL TO UNIF~iM HEIGHT AND ZERO TO POND BOTTOM N A 353.00 Storrn Event Surface Elevation (from 359.00) Peak Outflaw Q~fFSSioN`~a$9
6.1MMEDIATEI.Y AFTER Ii'S CtNJSTRUCTION, APPR~tL4TEI.Y SEED AND MULCIT THE ENTIRE DISTURBED G~pE ~R ~ OF THE SPREADER. TOP OF DAM WIDTH 1 p' -5t- SEE SPOT ELEVATIONS
~ AREA OF THE LEVET. SPREADER. flUTLEI' ARFA -THE OUltkf DISPOSAL AREA MUST BE GENERAU.Y SMOOTH AND WELL T® 96'-0" 8'-0° VEGETATED WITTT A MAXIMUM 50PE OF TOX. 5', TOP OF ANTI-FLOATATION 9' x 9° 353.00 1-Year 356.56° 2.44' 6.64 cfs
5°x5' RISER CREST (4 x 5'x8'° 356.25 10®Yeor 357.40° 1.60° 45.90 cfs m s o $ ~
PIANI VIEW .m..~........, nl n~ °r° rs- ?ior mitreear iAi ara° Area z~~ n7 ®°oyli.~°'sFI~CI N~~~,oo°. ~~'a°®
I PLUNGE BASIN ENERGY DISSIPATER ~ I LEVEL SPREADER ~ nD OUTLET PIPE INVERT OUT 48 LF ®2.297 351.17 50-Year 358.34; 0.664 51.77 cfs 'oo®®oFR®C®
~ prs "W" °o ~ ~ DO M DRAWDOWN OUTLET 10' i5s;A-Aml 353.00 100-Year 358.77 0.23 54.23 cfs
%om god f
HASENTREE GOLF CO~1f~~t1r`~11 'ER MANAGEMENT PON Ur'% S) C 0 1 d
FAMILY SPORTS FACILITY STORMWATER / LEVEL SPRI 1 SPREADER REVISIONS ENGINEERS, I LANERSI SURVEYORS
pyygf pgppqm WAKE COUNTY NORTH CAROLINA 111 MacKenan Drive Cary, North Carolina 27511 tel, 919-469-3340 fax; 919-467-6008 www.iftersmvenel.com