HomeMy WebLinkAbout20030661 Ver 2_401 Application_20111219�
� PABST & HILBURN, PA
�..' ENGINEERING & CONSULTING
December 14 2011
Natalie Landry
Environmental Specialist
Division of Water Quality
3800 Barrett Dnve
Pittsboro NC 27609
Surface Water Protection
�
03-��� t U �,
911 Paverstone Dnve Suite E
�� Raleigh NC 27615
Office 919 848 4399
Fax 919 848 4395
RE Responses to Notice of Violation - NOV 2011 PC 0588
Heritage Point Lot 12 (260 American Court Parcel #80673)
Apex, Chatham County NC
Dear Mrs Landry
P&H Pro�ect 183 11
� � � � � V �
UJ
D EC 1 5 2011
NC DENR
i Re�ional Office
Please find enclosed the items listed below in response to the Notice of Violation dated
November 3 2011 for the above referenced parcel
• Stream and Buffer Impact Plans 5 Set ��� �� �'-J
• Design Narrative and Calculations 1 Set � �
• Pre Construction Notification Form 5 Copy
• Notification of Jurisdictional Determination (Dated 2/19/2003) - 5 Copy
• US Army Corps of Engineers 404 Certification (Dated 11/7/2003) - 5 Copy
• Permit Fee $240 00
.
The Land Disturbing Permit associated with this pro�ect is currently under review by Chatham
County Environmental Quality Department Also copies of the above listed items were
submitted to Chris Hopper in response to the NOV of the Chatham County Watershed
Protection Ordinance
F
Please do not hesitate to contact me if you need additional information or if you have any
questions
Sincerely p ��
PABST & HILBURN PA �" ✓
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Panty1paHilburn PLS ��G�ANDST����ITy ��
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Enclosure
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A Applicant Informat�on
1 Processing
o3-o�c�t�2
Office Use Only
Corps achon ID no
DWQ pro�ect no
Form Version 1 4 January 2009
Pre-Construction Not�ficat�on (PCN) Form
1 a Type(s) of approval sought from the Corps I � Secfion 404 Petmit ❑ Section 10 Permit
1b Specify Nationwide Permit (NWP) number ���, o� General Perm�t (GP) number
1c Has the NWP or GP number been venfied by the Corps? ❑ Yes � No
1 d Type(s) of approval sought from the DWQ (check all that apply)
� 401 Water Quality Certficatio� — Regular ❑ Non-404 Junsdicbonal General Permd
❑ 401 Water Quality Certfication — Express � Wpanan Buffer Authonzation
1e Is this notficat�on solely fir the record For the record only for DWQ
because wntten approval is not required? 401 Certficatwn
❑ Yes � No
1f Is payment into a mitigatbn bank or in-Ueu fee program proposed for
mitigation of impacts� If so attach the acceptance letter from mitigation bank
or in lieu fee program
1g Is the pro�ect located in any of NC s twenty coastal count�es If yes answer 1h
below
1 h Is the pro�ect located within a NC DCM Area of Environmental Concem (AEC)?
2 Pro�ect Informabon
2a Name of pro�ect 206 Amencan Court
2b County Chatham
2c Nearest municipality ! town Apex
2d Subdivision name Hetltage Pomte
2e NCDOT only T I P or state pro�ect no
3 Owner Informatfon
3a Name(s) on Recorded Deed Robert James and Shauna Quenn Hamson
3b Deed Book and Page No 1533 1184
3c Responsible Party (for LLC �f
3d Street address 1500 Applethom Dnve
3e City state zip Apex NC 27502
3f Telephone no (919) 337-8400
3g Fax no (919)267-4893
3h Ema�l address rob�hamsonfence com
For the recbrd only for Corps Perm�t
❑ Yes � No
� Yes � No
❑ Yes � No
❑ Yes � No
II]
�ENR
Page 1 of 10 �
PCN Form — Verswn 14 January 2009
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4 Applicant Intormation (it diftereM trom owne�
4a Applicant �s ❑�ent ❑ Other specdy
4b Name
4c Business name
4d Street address
4e City state z�p
4f Telephone no
4g Fax no
4h Email address
5 AgentlConsultant Ir�format�on (iP appiicaWe)
5a Name Patty E Hdbum PLS
5b Busmess name pabst 8� Hdbum PA
(�f appiicable)
5c Street address 911 Paverstone Drne Suite E
5d City state z�p Raleigh NC 27615
5e Telephone no (9'�9) ��3�
5f Fax no (919) 848-4395
5g Ema�l address phdbumQpabsthdbu�n com
Page 2 of 10
B Pro�ect Information and Prior Pro�ect H�story
1 Property Ident�caGon
1a Property identrfication no (tax PIN or parcel ID) 0702-65 9258
1 b Site coordinates (in deamai degreesj Latitude 35 7428 Longitude 78 9765
1 c Property s►ze 4 637 acres
2 Surface Waters
2a Name of nearest body of water to proposed pro�ect White Oak Creek (Jordan Lake)
2b Water Qualdy Classificat�on of nearest rece�vmg water WS IV NSW
2c River bas�n Cape Fear
3 Pro�ect Descr�ption
3a Describe the existing conditions on the site and the general land use in the wc�nity of the pro�ect at the time of this
applicat�on
The general land use m the pro�ect site s viamty is residential The ma�onty of the site is wooded with a sVeam located along the southwestem
boundary line Stormwater runoff currently sheet flows from the high point located near the north eastem comer of the property and mto the stream or
mto an existmg recreational pond
3b List the total estimated acreage of all exisUng wetlands on the property 0
3c List the total estimated Imear feet of all exisUng streams (interm�ttent and perenrnal) on the property 605
3d Expiam the purpose of the proposed pro�ect
The purpose of this pro�ect is to construct a dnveway to access the residential property
3e Describe the overall pro�ect m deta�l including the type of equipment to be used
Fiiling and pipmg approx 65 LF of stream in order to construct a access for the property Equipment used wdi mclude r�. 33 SMa,Pn-} Dk�,��
3 z z G-X Gav�ca�...� A-t� vc�.�Ee. 9 S 3 T�,q-c. �c- �
54 S t�-s o�,=l�
4 Jur�sdictionai Determinations
4a Have �unsdictional wetiand or stream determmations by the � Yes ❑ No ❑ Unknown
Corps or State been requested or obtained for this property /
ro ect mcludm all nor hases in the ast� Comments Hentage Point Subdwision (Apex)
4b If the Corps made the �unsdictional determmation what type � preliminary ❑ Final
of determination was made�
4c If yes who delineated the �unsdictional areas� Agency/Consultant Company Engineenng Consulting Services
Name (if known) Other
4d if yes list the dates of the Corps �unsdictional determinations or State determinations and attach documentation
Notification of Junsdictional Determmat�on for Hentage Point Subdivision February 19 2003
5 Pro�ect H�story
5a Have permits or certifications been requested or obtamed for DYes ❑ No ❑ Unknown
this pro�ect (including all pnor phases) in the past?
5b If yes expla�n in detad according to help 61e instructions
DWQ 401 Permit 03 0661 USACE 404 Permit Action ID 2003 20450
6 Future Pro�ect Plans
6a Is this a phased pro�ect� ❑ Yes � No
6b If yes explam
Page 3 of 10
PCN Form — Version 1 4 January 2009
!1�
C Proposed impacts Inventory
1 Impacts Summary
1 a Which sections were completed below for your proJed (chedc all that apply)
❑ Wetlands � Streams — tnbutanes � Buffers ❑ Open Waters ❑ Pond Construction
2 Wetland Impacts
If there are wetland impacts proposed on the sde then complete thts questron for each wetland area �mpacted
2a 2b 2c 2d 2e 2f
Wetland impact Type of impact Type of wetland Forested Type of �unsdiction Area of
number Corps (40410) or impact
Permanent (P) or DWQ (401 other) (acres)
Tem ora
W 1 Choose one Choose one YeslNo
W2 Choose one Choose one YeaMo
W3 Choose one Choose one YesJNo
W4 Choose one Choose one YesMo
W5 Choose one Choose one YealPlo
W6 Choose one Choose one Yes/No
2g Total Wetland Impacts
2h Comments
3 Stream Impacts
If there are perenrnai or intermittent stream impac�s (induding tempwary impacts) proposed on the srte then complete this
question for all stream sdes impacted
3a 3b 3c 3d 3e 3f 39
Stream impact Type of impact Stream name Perenn�al (PER) or Type of Average impact
number intermittent (INT)1 �unsd�ction stream length
Permanent (P) or width (Imear
Temporary (T) (feet) feet)
g1 P Culvert Tributary to Jordan Lake INT DW� 5 25
g2 P Cuivert Tributary to Jordan Leke INT DWQ 5 35
S3 T ediment Tributary to Jordan Lake INT DWG1 5 130
S4 T Sedim Tnbutary to Jordan Lake INT DWGl 5 10
S5 Choose one
S6 Choose one
3h Total s�esm and tributary impacts �
Stream w th is op of bank to top of bank S1 36 RCP S2 42 RCP ��
Page 4 of 10
PCN Form — Version 1 4 January 2009
4 Open Water Impacts
If there are proposed impacts to lakes ponds estuanes tnbutanes sounds the Atlant�c Ocean or any other open water of
the U S then mdividuall list all o en water im acts below
4a 4b 4c 4d 4e
Open water Name of waterbody
impact number (d applicable} Type of impact Waterbody Area of impact (acres)
Permanent (P) or type
Tem ora T
01 Choose one Ghoose
02 Choose one Choose
03 Choose one Choose
04 Choose one C�uose
4f Total open water �mpacts
4g Comments
5 Pond or Lake Construction
If ond or lake construction ro osed then com lete the chart below
5a 5b 5c 5d Se
Pond ID number Proposed use or Wetiand Impacts (acres) Stream Impacts (feet) Upland
purpose of pond (acres)
Flooded Fdled Excavate� Floc.d�, I����led Excavated
P1 Choose one
P2 Ch�se one
5f Total
5g Comments
5h Is a dam high hazard permit required� � Yes � No if yes permit ID no
5i Expected pond surtace area (acres)
5� Size of pond watershed (acres)
5k Method of construction
6 Buffer impacts (for DWQ)
If pro�ect wdi impact a protected npanan buffer then complete the chart below If yes then individually list ali buffer impacts
below If an im acts re uire m�ti ation then ou RAUST fiil out Section D of this form
6a Pro�ect ts �n which protected basm? � Neuse ❑ Tar Pamiico ❑ Catawba � i�andleman � Other � ape Fear
6b 6c 6d f�e 6i i 6g
Buffer Impact Reason for impact Stream name I E3uffer � Zone 1 , Zone 2
number — mitigation ' impact � impact
Permanent (P) or required� (square (square
Tem ora T feet feet
B1 P Dnveway Construction Dnveway t�o 9� E 30 � 616
B2 T Slope for Bwlding Pad 9 No 1.,0 1 774
63 T Slope for Buddmg Pad � T 1Vo �__c, 315
B4 E Yes/ho �
B5 Yes/No '
86 f YE �a.,� �
6h To4ai Bufi�r i�npacts 11 7so 7 705
6i Comments V� �� � �
Page 5 of 10
D Impact Just�ficat�on and M�gat�on
1 Avoidance and Min�mization
1a SpeGfically descnbe measures taken to avotd or mirnm�ze the proposed impads in des�grnng pro�ect
Unfortunetely the property owner hed no way to avoid the iwo stream Impads due to the lot oo�retla�
1 b SpeGficaily descnbe measures taken to avo�d or mirnmize the proposed impac�s through construdron techniques
The impacts were reduced by minimmng the width a� the dnveway
2 Com ensato Miti ation for Im acts to Wafiers of the U 3 or Waters of the State
2a Does the pro�ect require Compensatory M�Ugat�on for � Yes � No
impacts to Waters of the U S or Waters of the State?
2b If yes miUgat�on is reqwred by (chedc all that apply) ❑ DWQ ❑ Corps
❑ Mdigation bank
2c If yes which m�tigation opbon vtinll be used for this � payment to in-I�eu fee program
pro�ect�
❑ Pem��tee Responsible Midgabon
3 Com lete if Ustn a Mit� ation Bank
3a Name of Mitigat�on Bank
Ty� Choose one Quanbiy
3b Credits Purchased (attach receipt and letter) Type Ch�se one Quanbiy
Type Choose one ����Y'
3c Comments
4 Com lete if Makm a Pa nt to in-lieu Fee P ram
4a Approval letter from in lieu fee program is attached ❑ Yes
4b Stream mitigaUon requested linear feet
4c If using stream mdigation stream temperature Choose one
4d Buffer m�tigation requested (DWQ only) square feet
4e Riparian weUand mitigation requested ecxes
4f Non nparian wetland mfigaUon requested aaes
4g Coastai (tidal) wetland mitigation requested ecx�es
4h Comments
5 Complete if Using a Perm�ttee Responsible Mdigation Plan
5a If us�ng a permittee responsible mifigafion pian provtde a descnption of the proposed mfigaUon plan
Page 6 of 10
PCN Form — Version 14 January 2009
6 Buffer Mrtigat�on (State Regulated Riparian Buffer Rules) — required by DVY4
6a Wdl the proJect resuit m an impact vinthin a protected npanan buffer that requires � Y� � No
buffer mifigation�
6b If yes then ident�fy the square feet of impact to each zone of the npanan buifer that reqwres md�gat�on Calculate the
amount of mitigation reqwred
6c gd �
Zone Reason for �mpact Total impact Mulbplier Required mibgation
(square feet) (square feet)
Zone 1 3(2 for Catewba)
Zone 2 � 5
6f Total buHer m�tigation requ�red
6g If buffer mitigation is reqwred discuss what type of m�gatron �s proposed (e g payment fi� prnate mitigaron bank
permittee responsible npanan buffer restorabon payment mto an approved in-lieu fee fund)
6h Comments
Page 7 of 10
E Stormwater Managemerrt and D�ffuse Flow Plan (requ�red by DWQ)
1 Dlffuse Flow Plan
1 a Daes the proJect mclude or �s it ad�acent to protected npanan bufFers �dentfied � Yes ❑ No
w�thm one of the NC Ri nan Buffer Protectton Rules?
1 b If yes then is a diffuse flow plan mcluded? if no explam why
There wdl be no pofnt discharge that will requlre dfffuse flow
� Yes � No
2 StoRnwater Mana ement Plan
2a What is tl�e overall percent imperviousness of this proJect? �r g,� (M�)
2b Does th�s ro ect r wre a Stortnwater Mana ement Pian? � Yes ❑ No
2c If this pro�ect DOES NOT reqwre a Stormwater AAanagement Plan explain why
2d if this pro�ect DOES reqwre a Stormwater Management Plan then prov�de a bnef narrative descnpbon of the plan
The site wnll be graded such that runoff irom the improvements wdl sheet flow through the existlng stream bufters A pwtlon of tl� site c�nsfetlng of
woods wdl sheet flow to a swale loceted north of the drnreway This swale vhll direct the flow b a flatEer slope awele that wdi discharge the runoif mto
the exisUng stream
2e Who v►nll be responsible for the rev�ew of the Stormwater Management Plan? ��m ��Y
3 Certified Local t3ovemment Stormwater Revlew
3a In which locai ovemment s unsdiction is this ro ect� ��" �O1"�
❑ Phase II
3b Which of the follo�nnng locallyamplemented stormwater managemerrt programs � NSW
apply (check all that apply) � USMP
Water Supply Watershed
� Other
3c Has the approved Stormwater Management Plan �nnth proof of approval been �Yes � No
attached?
4 DWQ Stormwater Pr ram Rev�ew
❑Coastal cou�es
❑ HQW
4a Which of the folio�nnng state-implemented stortnwater management programs apply ORW
(check all that apply) �Session Law 2006-246
❑Other
4b Has the approved Stormwater AAanagement Plan vinth proof of approval been � Yes � No
attached�
5 DWQ 401 Un�t Stormwater Rewew
5a Does the Stormwater Management Pian meet the appropnate reqwrements? � Yes [� No
5b Have all of the 401 Unrt submittal reqwrements been met? ❑ Yes � No
Page 8 of 10
PCN Form — Vetsion 1 4 January 2009
F Supplementary Information
1 Environmental Documentation (DWQ Requiremen�
1 a Does tl�e pro�ect invoive an expenddure of public (federaUstate/locaq funds or U�e � Yes � No
use of pubiic (federai/state) land�
1 b If you answered yes to the above does the pro�ect reywre preparation of an
environmental document pursuant to the reqwrements of the Natwnal or Stste ❑ Yes � No
(North Carofina) Environmental Pol�cy Act (NEPA/SEPA)�
1 c If you answered yes to the above has the document review been finalized by the
State Clearing House? (If so attach a copy of the NEPA or SEPA final approvaf
letter ) ❑ Yes � No
Comments
2 Violations (DWQ Reqwrement)
2a Is the s�te in violation of DWQ Wetland Rules (15A NCAC 2H 0500) isoleted
Wetland Rules (15A NCAC 2H 1300) DWQ Surface Water or Wetland Stenderds �Yes ❑ No
or Riparian Buffer Rules (15A NCAC 2B 0200)?
2b Is this an after the fact penrnt application� �Yes ❑ No
2c If you answered yes to one or both of the above questwns prowde an expianabon of the v�ola6on(s)
Two storm dra�nage pipes were installed dunng the construcUon of a residentlal driv_eway Sediment has eccumulated in the stream due to the
installabon of the pipes and grading of the driveway
3 Cumulative Impacts (DWQ Requirement)
3a Will this pro�ect (based on past and reasonably ant�apated fubure impacts) resuR in �Yes � No
additional development wh�ch could impact nearby downstream water quahty?
3b If you answered yes to the above submit a qualitative or quantitafive cumulatrve impad analysis in accordance wdh the
most recent DWQ policy If you answered no provide a short narrabve des�xiptron
4 Sewage Disposal (DWQ Requirement)
4a Clearly detad the ultimate treatrnent methods and disposfion (non-discharge or discharge) of wastewater generated from
the proposed pro�ect or available capaCIty of the subIect faGltty
Ultimately the site sewer wdl be treated by a sepi�c field tt�t will belocated on the properly See aRtached plans
Page 9 of 10
PCN Form — Ve�on 14 January 2009
5 Endangered Species and Designated Crklcal Habitat (Corps Requirerr�nt)
5a Wdl this proJect occur m or near an area with federaily protected species or � Yes ❑ No
habitat�
5b Have you checked with tt�e USFWS concemmg Endangered Speaes Ad
impacts? ❑Yes � No
5c If yes mdicate the USFWS Field Office you have contacted -
5d What data sources did you use to determine whether your s�te would impact Endangered Specaes or Designated Cntical
Habitat�
NC OneMaps Website
6 Essentaal F�sh Hab�tat (Corps Requirerr�nt)
8a W+H th�s pro�ect occur in or near an area designated as essent�al fish hebdaY� ❑ Yes � No
6b What data sources did you use to determme whether your sde wouid impact Essentiai Fish Habdat�
NOAA Essential Fsh Habitat Mapper Webaite
7 Histonc or Preh�storic Cultural Resources (Corps Requirement)
7a Wdi this pro�ect occur in or near an area that the state federal w tnbal
govemments have des�gnated as having histonc or cuftural preserva�on � Yes � No
status (e g Natianai H�stonc Trust des�gnation o� proper�es s�gnficant m
North Carolina history and archaeology)�
7b What data sources did you use to determ�ne whether your sde would impact histono or archeological resources?
NC State Histonc Preaervabon Oifice GIS
8 Flood Zone Des�gnat�on (Corps Requiremer�t)
8a Will this pro�ect occur m a FEMA-des�gnated 100-year floodplam? ❑ Yes � No
8b If yes expiain how pro�ect meets FEMA requirements
8c What source(s) did you use bo make the floodplain determ�nation�
FEMA Map 3720070200J
��-t-�.� E ��, �u � �� , , zl � 3 � �,
ApplicanUAgent's Pnnted Name IicanUAgents Signature Date
(I�enYs signabure fs valid only it an authotizatlon
letter irom the Ucard ia rovided
Page 10 of 10
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PAGE 02
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NOTIFICA,�UN OF JtIRISDIC'�I�NA�. A�TE1tMINATIOIV
Property
Ow�ner ment
sts � e
A,ddre�s 211 1
__ b,tirl+Am NG 277I3
.�
�"elepho�� Number
Aathorized
A�lpt_.,�,i„ ne�r�n C��eri1COS Ltt�...
i
Addresg ce
�tp�.� T gnel var�c NC 27709
Telephone IVuntber 8Q0-327-5832
e �e pro�� �
Iocated on the north s�dg of NC 64, app�roxttnate�y 1 mile we� a�NC ?Sl, ui Chatham Caunty, Nort�
Caroluxa
Bas�s for Dete ��nn - The s�te conta�ns w�tlands and str�am chaanels wxth iadicators o� vrdinary
' ����\MI�
�igli water marks, ]ocated adjacent to sn utu�amed tdbuta�ryr a�' W'iutc 4ak Creek, abave headwatex�s, in t�e
Cape Fear Ri'vtr Bastn
� e f
�_.'t`here are waters a� the U S, w irnclude wetlande, ot� the above deecrib� prope�ty, which we strongiy sug�ast
shauld 6e scuveyed. The surveyed w�etta�t+d l�aes must b� vert�ied by, �rr s;afl►bef'one tii� Catp.s wi11 make a�inal
'1�risd�ctionat determiaat�on an yaur PmD�"b'
�He+c�use o�'the size of yowr property and our �nt wr�lcload, our idanbiiceti�n a�d dolineabor� o�your wedands
cannot be �ccomp�isiaed tn a bmaly tria,tit�r You may w�sh ta obtam e coc�sc�ttant to obta�t a more bmely
' deimeation o� t�e, wetlAnds (Jttce dte coneult�t bas tlag�ad a wetland tm� on the pro�ty, stafi' waU
m
raview �t, and, if �t is sacurate, we stron,giy rec�r�atend tbat y�au hawa the tine gtu'veyed far fu�al approval by the
Cacps 'i'he Corps w�i! not mske a�nat jurisdic�oaal determinatian cn yovt pcoperty w�wut ar� �prvved s�,�ryey
�",The watecs of the U S., !a inctude wetiands, on your tot have 6een del�neat�, and tke 1�nuits af the Corps
�urisdict�on have beeri expla�ned to you U�less tl�e is a change u� the !aw or aur pnblished regulatio�s, this
d e t e r m� n e c i o n n� t a y t� e re 1i e d upcm f o r a p e r a o d nat �a e o n� e� five years from the dam af this notificatson
There aire no weiera of the U 5, tc malude wetla�ds, �et�t cm the abeve descn'bed proper�y which are �bject to
� �e perm�t reguzrements of S�ctwn 404 af the Ckan Water Aat {3� USC i 344) �Jrile� titere ts a cbet�ge �n the 1aw
or onr pubiished reguiations, th�s determinatlon m�y be relied upon for a pe�tod aot ta exceed five years from the
ciate of th�s not��ication
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Piaceir � u� dredged ar �E mateMa� in weNanda o� tbuis property witbout a�Deepart�aaent � tl�e
Army Permxt � nn most cases a v�ol�tion a� 5ecNon 30� of the Clean Watea- As4 (33 USC 131I) A
,permrt � aot rec�air�d �or work on the property c�estrlcte� en4rety to �ucishng h�ghh ground �f yan
have any qnegt�ons re�arding the Cot��a of ]�ngtneere r�gnlatory pro�aam, p�ease contact
Todd Tu�gwea_. t,__, at telephone nambet�,(9t 3 87b - 8,�{� te�tginn �g
ProJect Manager 5igttalvre ��
Date ,_ Febniarv tq�2403 E iret�o�a Iaate �ebruar� 1,�,,2008 ,�.,,w
SA�t.V�X PLAT OR k"XELD SKE'x'�H �7F Ti�� IDESCRIBEA PItOPERTX A�ib THE W�?LAND
DE1,,iNEATION �(?ltM MUST $� ATTACHED TO TAE YELIAW i(F'tL� C�Pi� OF TH�iS �pRNi
J 02/24l2903 06 �7 919@063792 P�E 03
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be �ou� at
ou may accept oc
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to the petm�t
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• ACCF.PT if you received a Stend�d Perrpit, you tt�y s�gn tha.permit tbcumant and retcun it co tho d�str��t en�neec far �inal
autlwrizadat� If y�a roc,eived s l,e� qP Perm�aaion iL{)P� Y'oa�+ n�aY aco�t the LOP �d your worDc rs autharlzed Your
signeture on the Sca�dsrd Pemut or � of �e WP meena tbet you aoae� the pa�m�t in its entirety, and wa�ve a!i n�ts
to appeal the per�n+� mcEuding its tarms end cand�tc�a, and approved 9tn�isdicaonsi �terminatro�s assac�aeed with tha permi�
• oa►ECr tf ycu object to Qte perrntt (Stendard or LOP} �uae of �rtai� termd and cot�dhtooe titereM, you enay request �at
the permet be madi#ied accordiRgly You must comptets �eeteaa iR af thta form and t+�um �e farm w ihe di�rict �g�nee�
Your objections must be recef ved by d�e dietrlct sngineer a►tthin 60 days of tt� date of th1� nat%e, or you wiU forfait �aur dg6t
to appeat the petmit itt the iatut�e Upon rece�pt of your ktter tbe disrcet atglnoor w111 z,raluara y�ur objettions ea�d rnay� (a)
modify the perAnit to sddress al1 of Y�' �, (b} mot�y the peratit to �� otyaur oi�eetiotss, or (c} not �nodiPy
the permit havtng determmmd that tbe perreit eho� b�e � as previ�ottsly wri� ARer eval�sttg yatsr objectfoas thc
dxserict engh�eer wtii sand you a pro�d permlt for yott� re�slder�to», as mdiaated �t Settion B below
:
�Y ��Pt � �PP� � P��t
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AC4E�'T IP you receiv� a S� P�nit, Y� a�y etgn d�e P�rn�t �aet►t end reao�n �t to the d�rict engi�r for fina!
auti�onzatian If yau r8ceivad a� of Pam� (LOPI. Y�+ �Y �� � LOP attd yauc vrork is autiwwr�ied Yaur �
sig�ature op the Stat�dsrd �ann� or � ef tlte I.OP rt�s t� you aeoe� tt� petmtt in its ensir+ety, a�td +�+�,1ve ail rigMs
co appea! the peim�t, iacludu�g �ta �'a�s and cond�tions� emd app�aved �ucisdiala�si deter�ans a�ciated wlth cite �rm�t
APPEAi. If yon ehonse m decime t1�p l�ofl�ed Pe�� ista�derd Or �O� becawe of certafin tcxtns and conditlons therein, you
may appea! the declined pennit c�d� the Corps of &nguieas Adrnmi�radve Appeat Pr� by �letang 9eeteon R of th�s
forrn and sending ttie form w tha divlsi� engina� '!'�is tbrm m�c bo recet�ed by ct� dlvisfon engit�eer w}ehia 60 days vfche
date o�t�is notice
t; r�tt M[ 1�,JGNIAL You lstey eppeal the deni�i Of a perntit unda the Corps of �gletoers Adm�matret�ve Appaai Proeess
by campleqng 3eccioa tf ot'th� �rn►aod s�d3ng the �bnn to�t6e div�aion engi�eer Thls farm mnst be rer.e�ved by the�divisi�
engeneer within 60 days oftha date ofthis nc�tfce
A APPRnVFD N�SDIC'�4NAL DETERM�IVATtpN You m�y accept or eppeel th� app�roved JP ar
provide new infornsauon
� ACCSPT You do noi rned to notity the Caryn to a�xept art approveQ JD Failnre ta notitjr thc Corps within �tl days oF thc
date oP this no�ce t�eans that yau accept the appmved !p m rts et�t�ety and waive a!! nghts ea app�i the approved ID
� APP�AL If you disagree with the approved J�, y0u t't98y eppest the aDproYOQ JO under the �orps of Esigttteet5 Admipistretive
Appeal Proceas by camplehng Section I! of th�s fom� end sending tht fonn to the dlvi�ion engencer Th�s f�m must be rec¢rved
by the division eagineec w�thm bp days of the dete di t��s not�ee
� �rcc��.tmtttvt+►tc Y.�uK1,L�l�:"11QNAL DEI�RMINAT�QN You do aflt need to respottd to the Corps
regaridcng the prelaminary �p The Fr�timtt�ary JD ts not appealabEe IFyou wRSh, you rnay request az,
appraved �D (whseh m�y be a�peai�d), by cantacttng the Corps d�stnct for feu�thet tttstnicnan Alsp you may
pravlde new �nformauan for further cons�deration by ihe Catps to reevaivate the .iD
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02/24/2003 06 07 9198063792
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PAt� 04
R'�a4S4NS FOR AP�EA,L QR OBJECTION3 (D�e yow reasons !'cr sp�ting the da�sio� or yovr objechor� to an
init[al proiTerad pecm�t t�n afear crntclse s�temec�ta. You may attacti atiditional inf� to this i`orm �c ctanfy whore y�ar reasons
or abjectians a�e tuldre9sed in the �dmtnistrative t+ecot8 )
AAAi'�'iQNAL iNFORMA'f�ON The appoa! � li�ttited to a Te�view of tlta a�ninishative recw� tite Cotps me�ao�raadt�m br the
record af the appeal cont�retice ar ttt�tib�, and aay sugptem�tel luf�to� that tl� �w ot�loer ltaa deurmfaed is needed t�
ctazcf� the �dminisq�aqv� r�ord. Nottitet d�s appeilaat twc the Cor� me�y add aew in�ormehoo a�r eaalyses to the nacord Nowover
u ma vide additlonsl iniormaqon to clari the locatton af laforanac,ot� thet is aEresd in ths a�miniseradve record.
t o'� z i" � .y y, '' t,M ��s �v
i�yoa have Qirestions tegatdtag this dec ton end/ar dse eppe�l �Pyou o�tly beve quesdot� re�erdu�g the appeal process you rnsy
pmcess you m�y contact � ��
Mr 'i'add Tu�wel�. Regulatory Sptaeliac lutr Arthur Middltbon Adcnm�suapve Appeal Revicw Ot�cer
Rate�gh Regulatvry F�oki afiice CBSAD�fiT•CO•R
6588 Fal[s oPthe Ateu� Road Suite i24 U S Arn�y Coe� ef F.a�ineers, 5outh At�anac d►v�sian
R�teigh, North Carol�+a 2T61S 60 Forsyyt Stre�, Room gpd�5
RICii�T QF �7�iT'RY 1
� consuhanm, to conduct
zioUce af anv site iaves
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iature below grents the y
ations of the pro�ect si�a
e
and w1I1 have the ocvor
Sig�natu�e o£apPellant or a�e,�t
AlVISION �PIGtNBBit
Contmander
U.5 Army �e$ineet Divtstud, Soat4 Attantic
6� �orsylh Street, Roam 9Mf15
Atlanta Georgia 3030�3-3d90
er�p�y m� Corp� vf F.�deers paF
the course of d�e appesl process
a artid te M a11 �ita mveate
Det�
nr+e� �a eny govat'�meM
You wi11 be pmv�ded a lS day
Tel��hone number
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Act�on ID No 200320450
DBPAR'PMENT OF 7[� �M"Y'
wilm�ngton Ihstnct, Cor�rs c�� Sng�cr�zs
Post Office Box 189U
Wilmingtan, North �aroluia ��402-1$90
FL'�?�,�G ��e�YI7sLL7
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Patriek 0'Nea], C:ha�hhazn Develc�p��eaa�, :.LC., �1 ;,i,a��Zors �Zrd� IDra ►e �urhaan,
North Caz+ol�na, 27713, has applied far a�ep�,atm.,��t �.itiz� rLr.�� �s.a �� p�t �'a� �;.,�,CE FIL�,
MATERiAL Il�TTO 176 LIlVP�AR FEET OF S�'REA�/I CIE�t�IG, ANI� a p7 �. �.`� OG 1 7� 5
LIlYLAR. FEfiT OF S�'REAM CHAMNEI. AND 0?�3 ACRE �� �rE� vAa+fl�S �NG
LTNNAMED TRIBUTARIBS TQ W�'llTB QAK CR�]E]K, Ild � CAP'� �,A.i.:c�z �:�ASlN,
ASSOCIATED WITH THE CONSTRUCTIQN GF HBRITAGE P()� ;U�DT�SION Il�t
CHA1'HAM COUNTY, NOR1'H CARU�.��'�' ��
The followmg des+cnption �f t�e titi � i� x� +.4:s:u �� rs..►a r���c�.� a,r F?t�, �� �v��= �nd
frorn observatrons mat�e dunn� a,�t� n�t'�,, � a�:� ..��,ata.�,w� c,C .t.�, t,^r�,. .��'.�as�:�,�w ��l,aus
submxtted with the applicahon shav�p i.�., ��p�s.; czresfia�..,,��t+ ... te�v�. r..�,rf �... c.� s��... c! �sxsl two
dnveway crossu►gs wrttun tnbutar�es ta �ukL � a�?. vr�eL, ���.,�t�3 �y.� c�e P 1�y �. '�.�.qrxay b4,
aPPmximately 10 aul� west ofN' C�gh�v�� 7S �, :u e�'xaf!.ar.,� ���r,�,r, '�u� �,.�,.�,.L:�,.
Both ponds are propased to �e su�..t��.��t°� ����ka :.�.°Sben cia�ns, eacD� me�s�aa�ng 3�� feet in
height Both pands have be�► des�gn� wYth co�crc�e e�r�+��y ov�rfflow spmllva�y�, �id
P��'Y �illways cagahle of pass�xig �,x, lc,� �r„�. .,�;,�u �l� > ��,. } �,,.� � L .��. �_.� '
idenbfied m the ptans as Pond # 1, : ���a.,�.. �.. ��, : i .,,.�z� .�a �...c ...!� ..r� �.a _ ���_�;t..� ��tth
a capacity of 2Z acre-feet of �►a4�r u� �.�.ra�u� �4�, �.�.�:s4i�.. ...�:. �.�2�i r,�.: > w 4il ,,.,.�t .� th�e
placement of fi11 matenai mtsr 7t� �..�s i�� �i �w.,�.at .,�aa.�...�3 i.� fir d c.�..7,� .�� 4.��. ,,�J �� of
690 Lue�et' fe�t of 81'te8m Chaxmisl &�.t� U� t:s .t.� re �f xcti�fi=�'t? e. �,�E; ..4. } c,a�. �.: :�..,.�:,.�. .�n u�e
eastem partian of the t�ct, is prvposed to be 3 i ac-rr.� aA� sx� �z�l i�as Dc�� d�igne� �r��ri s
capac�ty vf 27 acre fe� ofwater �� noY�.�. �...�.., �.�,. .� �.wt�. ss�s. 1�. �_ ��.x..,,.a.x. �' fs,L r..��al
�to 701mear feet of stream chau�n�.e ��z t►�„ �i�., � �f �. ,. 7� � js!��,� �c r+.,1� 1� ��. �.. .�t ,.� �sheam
channel and 0 009 acre ofwetlan�., a��� ��,,�.,,.,�.; �,�L..F. ...� .�t.,,�.n �,..a.,� s., �.,� �,., t�. �s
�iCir�LL�� �d� LV Cll� �Ps"1���� �..s�l�..� r\.b fla..a �G ✓Id.J,.sa4 A�..tt i.°, .4{�w y
developmeaat af the lots vsntlu�n tla� �u�e�z�r�,, �,.� ,r� �uc.. ��,�.. ., �z� ...k�:� �.. �.� ...4...,c� .,� � � ` �.y
cmSSing*S, W1�i11IItj1�6 tQ1�221$ �� L Is�SE 7U'f.s O� s?i....3 3.'.i..._. .�,a.. �.1 ` L c._ ., e. �......} � s f7r
all thr�e dnveways i'1� taial �za�c.,� �.�rap �1 a..�� ��sz _�... ��. .� s..� c��t s�.� i i_ J ��i�,�
feet of strearn ahannel and 0 2�3 �t� �,f �v��iarn3� c��! �� �. v_ y A� �( �. �c .... szs.��r�,.cl v�iih this
pubhc nvbce
The apphcant pxoposes m1����� fv r r�. .�.� i� .,e L.�.�z �.±., r.�.�,. �..,,.u.4.. � a ts�
prnJect by pravtdtng paNne3it �n�3 t�aU S�Z:•�'i4A� C✓�.sdl�.au YY ..�.i..�.L �.�.� �la..! �. .�j � r�. >l� �ya+
restarahon of 8tJb hnear fee�t of a-t�.r� �I�au.�c,� a.�� y c.�, �°` �> .� z� �„�._� ,.�.,�.nel
� �..... _ .._. � _ _ �...,. A �.
am s�te in addihon, the apphcant proposes to p�eserve 13�f11mta�r feet vr strea�r► �urfer +an s�te
To rtut�gate for unpacts to w�lands associated with wetlands, the apphcant hae proposed to
create apprmc�mately 0 482 acre af wetlands on srte Th� �mpc►sea m,sta�atton �n.d �r. eservahon
artes are depicted on the a#ached. piana, how���r �lrna4 r� �� ��� ��Atg+���s� nlax�.s for �a� a�u�gatiian
sites is shll p�ndtng
The State of North Caralma v�nil revtew t}us pubh� �.ohc� �ca deterxnine th� �eed �or the
apphcaz►t to obt�n. any reqwred State authonzat�on No i�epar�n,ent of thr Arna� (T)A) pertn1t
will be issued unhl the caordivat�i S�c, 4iu�� ai o� t�,, p�ry�.�l +„�.� �c.�ti �.i...i ,,� ��;
revx�re,cl by this agency, nor wxll a�� ��a �t t+., s�c�.: w.,..i L,. �Sv t,L ..�.� � Z.� i��c.n uf
Water (�ua]itY {NCDWQ) has de:�er,su.�e� t�r. .���.c�h�'ti �r .� �.l�,r +,��.�,L �,� � .. �i c�.�� �s
reqYUred by PL 92-SOU
This apphcahan �s bemg considered pursuant to S�hrsn � of tbe Clean QVatsr Act (33
U S C 1344} Any person may L�.cj,aL�t �at x��. � wtt� t��. ..� .,.u+.�,-�.; ;�F �c.Q � x W�� �n ��e
nottce, that a pttblic hearing be h�c�s� Ea �,�u.����~ �.�us a��.�L+�..a�..sx "� q� �.r� f�, P,s�� t�. �w�.z�s �,
sha1l state, with gaztzculartty Eh�, a�e� fa :�.�.�a �.g .�,. �..� _. ,��.._nd
The D�stnc� Esigtaeer ha5 ���.�` � t� y+� t��._ L,� � a,, cr� a� _�ia =i ��,., ��r of
Histanc Places for t$�e pzesence �r ��+ce �,x aL�:stere.. ��Yti�� �� ��i ,� .a� cs.*tc� �� �� ,u.,,, ,�r�g
ehg�ble for mclusian t2�re�n. Based on the best availatale e�ndenrxy xt has b�t �ct���x�ed that
no s�tes wrtlun the vtcuuty of the ��Sc�.. sar� a�,��e,�red v� t�.�� ..� L+�i.�„ ���.... e� �c,' a.iion m
the RegistFSrr Bxaminahon of i�.�. ��.�t�az�ai: �� f,,, �i .�...� „ .a,..,,.. s d ,,,�k,. .,, �a ,,,,i„�. ,�f
Ctl�iilYB� I�l4�UTC61IIVe3h�8110I1S �� �6., i �i.i.. L.l,�1ii �� �.1 i �� � ..r� ,.°'�n 3i. �L� � ,w.,... ,,�{ .,1 ,�
prese�ce of othex �uch resousc�� 3`�iLswl�, f� ..aaa.►a w�A►il ila.��l+�ir,yi�..��Lt� avltr�tGfIIL� �i it�u�i�ul �� OI'
lustor�cal data may be iost or destr�y�cl by w�sr�c ur�ier c1�., .�„�,.�i �.�ru� �
The Distnct Engtnee�', baseei c,� �a s.iat�i,. .�.c�rarnw� � �� �, � �.al. �a � �.t t� .. g�a �.�,�, .��:
achvity wilt affpxt spec.ies, or th� s,ntac�l h�, u.., �i�..y�a �.� ,,u ...:�.,�.,.,t�.c. �. ��3 �..3as...Ld
pursuant to the End�ngered Spr�e3 �.�I� GS Y� R
The dec�saan �vhether Y� i:.vl4. a�)t..iu..ri Y� �tP. �...�4 1.. w L,1 .. L i r � iS�
�xnpa�cts mcludyng cuniul�n� e �� � �. � v ��� � c � c�s �,c �. i a � t 1 a � � �; w+ �., r �SN }�ubhc
inter�st Evalua�tan of the grob � r ��v�. t� ��t i� �t ur ,,a �i � 1�� r� , t+��w �.� �+� ���hc
lII'�IeSt IeQtil2�3 8 CSI6fill W�I�1tI1�+ Cl�,i�: �,ae(ro� ..�.tors, ..�.�.�. ��,...��c, � m�ant .. �,�...1 �uuuc.ular
case The benefits whiah reas�n ��xt,� ��� ! c, c�,�cted t m x � y� k °�,
balgnnced againsi it§ reasonabiy f�, ��s�. ��1� �� i�meMs. "" r��z � e w �c, _ �
]�O}103� � f�SO �. COIl(�lt1flY$$ bF"1.i<'i �"t'�Lj.. Wlll �X. r]�'C36 �E.L '�.� „(.L 4I' .1 �. �1L is.t� L
detenntned by the outcome of tts� �u��a1 �.�..�a.t�m,g pr+c�.�.... ��. �,x,, .. �, ,., �.a,. „x ��,1 t;ie
nat�anal conc�rn for both protect � arzL �� sL�„_�n of � Y � .._ �� �. u.� �., �._ may
be relevant to iha �gasa3 nzust �c. ..� . �.s�. :.�. �..�ludm� � .. ,. _..�....� �, .. ; �.ti _..,,.___ .� �ag
those are consenr�tron, �co��a��...�, se.,�4�,.. �..�., �,�ral �� .._ � _ �...� ..., .� ��.,, ,► _ti�iJ s:.��ival
values, fish and �lcllafe vaiue�, ii�.c�. L_�.z..a..�y a.�3 floQCi ..�.� �...d �� r. .�.L_z.� .za, 4 f i..
Execut�ve Order 11��8), da��d ,z�. r � �J� „ tare eri, ..< �...� .��. � _L _� �, � _, .��_
�' § t'�°? ,�'cr.t-� as � �e��L. �
�PPtY and co�servatcon, water quality, energy ne�ts, sa�'e�y, fn�a �ad �ia�r pro��xctuo�, antneral
needs, cons�der�hons o£prageriy o�n�iup, and. m genv�ral, t�� nee�s anat we1� af thc peu�ple
For act�vtt�es mvolving the placem�n4 a�a�redg�d vg �ill r�n�ls �ra �r� o��� i.lx�ted
States, a permrt wtll be demed �f the tlischarge #hat wou%1 ir� a�ailr��zed �y suc� �t woutd
nat comply wtth the Enrnonmez�tat Pmt�ction �s.�ency � 4Q�����.� �d�����s 5���� � the
preced�ng sent�ence and any ather a�pkcable g�aidel3aes ar �ant�.a a perm�.t vvsil �e �n.t�ct unless
the Distnct Engm.esr determ�nes tha� it would be contca�► to th� putvhc �nter��.
The Corps oiBngia►�rs ,i� sr�xz4�xtu.,� rorsu��.�,nte fi�,.�s �tu �. �c�.._, F�s.I�sa1, � a.� � Lr � c�.�!
agenci� and offtc�ai�, Ind�an Tnbes and other antere�sied �es �n �sder �+n con,�der ax�d evaluate
the �mpacts of thas �sa�oposed ae.t��v��. £�.y cx,��ae�ats r:,.. �� c.� � i e:_ .�r...�as.� v.i .�v ��. � c�rps of
Bngiaeers to det�rmuie whethe� tsr �ssu� i� :��i,r, conditss�� �� �1.� y u�.� i�� _4 f.� � Y a��ta.�l
To malce th�s d�i�on, comment� �ra �..� ti� ds,�..+,ss ung��,+ ��a� ��� r�_ �. d�ec i_� r�.4r�c.
ProP�rhes, water gua}�ty, gez:eza� wR� u�-,ara� c:�? �%ces .�� �,1.� r�z ��..�,.�n� .�ii� �.� .�.�.t.� s i�stesi
above Commenfi.� are �sed an �� �ie�a.�s,� c,� fln E� erU �a �a�.� 1►��.� i�,.�.�, �(.�[�� ar�d/or aai
Env�vtimental Ympact Statement (�IS} p�rsaa�ri. tu the �d�ou�e �vu�ur��tat r'�rl�c,,� A..t
(IV1�PA) Com,ment� are �s� us�a t� �� � �,�ati � �ne ne�1 �.�, .� E .,..,�.� ��........,� -� _ �.� �,,,c.z� „ i,e
the ov�rall public itateres� af the pr�p�s:,� a�.�.vify
t']e.118C$Ily� �$ (�P«CISl�'. �1�1C��,t �i.�'r �.,�s..t.. JAfu �a,.� lrol�.l11 .. ,,. ¢a..LI}' �.L. `�� }:,,l.,a L
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issues, deiues, �r tuasves St�+.s c�r�.�'�,.��.��z Y..s� by ��.� ��. .� �" ��. �° c..�. +°�"hc
NCDWQ oonsaders wheth� or ��t ti�.t ����.�±� ��cbvl*� � r a,�s, ',, ��c�+�� "� C 9,^�
306, and 30? of t��e Cle�u W�te� l'�. f T�'�� a�r� �ahon a�,. ��,.. p�.;,�,� s� +� s.��c iw �� .� �,��iment
ofthe Army ili�i� �eam:t se�ves � u�,��c�.�_ .� ffie RF�� .� �_ ...��..�_�at �.
Addit�onal mfor�atton re��d�ng r�s� G���ca 'Vt�'��. .�,� �a+�,a�.a�.�,� ,�.,r ;��, i��r,c,i,��,� a� the
afSices of th.a Wetlands l40I U� .� t<��t �i �,�....L �., ��L_�, ti 3.. .� �f �ti„ �,�� .� ,� w,�1
CIB�tiP�P BOUIE:� ��]�Iy I`.x.3�1 ��i 91��. CLJ�A� C� .J,.a..� � w .ti..� 1. A y{,� ..�.Sj.l.,.t.+ � s^�1S/
persan requesht+.g copies u��� p������ or ,_r ��sn.a�tuo� �. ���.
All persons des�nng to r�ak_ z�rr�.r..�� ls,�aaci� �..� �.Y�,�,..,.c..� z ��....�. 4 a_ �.r '�...�
certificauon shauld do �a � wr �.� ��:��►..�r_u � �.�e 1�J„ �.� .... ,,..��� .�� .., .. FJ,�t„ �a� y
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DESIGN NARRATrVE �►ND �l
���PPORTING CALCULATIONS Ra��'g11 ��a�aR�
FOR �� ~
STORM DRAINAGE AND EROSIDN CONTROL
FOR THE
260 AMERICAN COURT
Heritage Po�nte — Lot 12
Town of Apex, Chatham County, North Carolina,
Prepared for
Robert and Shauna Harrison
1500 Appiethorn Drive
Apex NC 27502
Prepared by
F, p��s� � �►eL�u��► ��
�..i �� � �� � � r ,�, ��
911 Paverstone Drive Suite E
Raleigh NC 27615
(919) 848-4399
Date Decerr� 12, 2011
Pro�ect No ° 183-11
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TABLE OF CONTENTS
Design Narrative
USGS Map
Chatham County Soils Map
FEMA Map
NOAA Precip�tat�on Frequency Eshmates
Storm Drainage Design
Runoff Calculahons (10 & 25 year Storms)
Eaushng 36" RCP A,nalysis (10, 25 & 100 year Storms)
Exist�ng 42" RCP Analys�s (10, 25 & 100 year Storms)
Storm Dramage Analysis Results
Grass Swale Design
Grass Swale #1
Grass Swale #2
Outlet Protechon Design
Storm Drainage Area Map
Page
12
3
4
5
6
7
8 10
11-13
14
15 17
18 20
21
MAP 1
�
DESIGN NARRATIVE
1 GENERAL
The property owners of Lot 12 of Heritage Pomte wishes to construct a house, garage(s) and a
paved driveway on an exishng 4 64 acre parcel located at 260 Amencan Court, Apex, NC
2 EXISTING SITE
The sub�ect site is cunently m the process of bemg developed Partial gradmg has occurred for
the dnveway and the buildmg pads for the house and garage Cunently mstalled are two storm
dramage pipes at stream crossmgs silt fencmg check dams, gravel construction entrance and
slopes have been stabilized with seedmg and �ute nettmg
The ma�onty of the site is wooded with a stream loca.ted along the southwestern boundary lme
50' buffers are required for the stream Stormwater runoff currently sheet flows from the high
pomt located near the north eastern comer of the property and into the stream or mto an existmg
recreational pond
Currently there are stream buffer unpacts on this site that will require remediation Impacts
range from installmg pipe witlun the stream bed to sedunent accumulation as a result of gradmg
withm the buffer
3 PROPOSED IMPROVEMENTS
Proposed development on the parcel will involve the construction of a house, garage(s), and
paved dnveway The proJect will disturb approxunately 160 acres with the on site unpervious
surface after development bemg less than the requued 35% maxunum built upon area
The site will be graded such that runoff from the unprovements will sheet flow through the
existmg stream buffers A portion of the site consisring of woods will sheet flow to a swale
located north of the dnveway This swale will duect the flow to a flatter slope swale that w�ll
discharge the runoff mto the existing stream Swale calculations have been included with this
report
The two storm drainnage pipes 36" RCP and 42 RCP were evaluated to ensure that each pipe
had the capacity required to discharge the 10 and 25 yeaz storms The 100-year storm was also
evaluated The capacihes for both pipes were sufficient after burying the pipes so that the stream
bed was located 20% of the pipes diameter above the mvert Contractor vv�ll lower the 42 RCP
so that the stream bed is located correctly Storm drainage calculat�ons have been included with
this report
A remediation plan will be developed to instruct the contractor on steps to take to remove the
sedunent from the stream Also, the contractor will remove the existmg rock used for slope
stabilization and replace it with a precast concrete wall as well as, lowermg the 42" RCP
1
4 EROSION CONTROL AND MAINTENANCE CONSIDERATIONS
Temporary silt fence has been placed along the lowest sides of the luruts of disturbance to
cleanse stormwater runoff before leavmg the site Other erosion control measures that have been
mstalled are check dams, gravel construchon entrance, and slopes have been stabilized with
seedmg and �ute nettmg All erosion control measures are documented on the enclosed erosion
control plan
Contractors shall be responsible for penodic rospection and ma.intenance of all indicated erosion
control devices In addition, mspection and any necessary maintenance will be required
unmediately followmg any sigmficant storm event Any measure that fails to funcrion as
intended shall be repaired unmediately Upon complehon of construction, the property owner
shall be responsible for srte mamtenance
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rrecipitation rrequency Data Server
PF tabular
PDS-based polnt
NOAA Atlas 14 Volume 2 Verelon 3
f Location neme Apeu, North Carol�na US*
Coordinates 35 T428, T8 9758
Elevahon 292fC*
sow�ce Doog�e Bnaps
POINT PRECIPITATiON FREQUENCY ESTIMATES
G M Bormm D Marhn B Vn T Parzybok M Y�tia, and D Rdey
NOAA, Naha�al Weather Service Silver SP��9 Maryland
ut � PF gra hp �cal � Maps enals
estemates with 90% confldenCe mtervals
rage recurrence unerval(yeare)
Page 1 of 4
,
_����JL? J �� L—'a�L?� � 100 �� 5� 1000
5-mm 4� 6 78 6.85 7.37 811 8.85 914 8 56 10 0 10 4
(4 51 5 38) (5 29�6 34) (610 7 2� (6 73 8 04) (7 38 8 84 (7 85-9 43 8 24-9 8 57-10 4 8 90-10 9) (916 11 4)
10-mm 3 94 4 63 5 32 5.89 6A6 6.89 726 7 58 7 92 818
(3 61 4 31) (4 24-5 08) (4 88 5 82) (5 38 6 43) (5 88-7 0� (6 25 7 51) (6 66-7 92) (6 79-8 2� (7 04-8 65) (7 21 8 94)
15 min 3�8 3 88 4A9 4 97 6.46 �6.82—� 6.12 &37 6.65 6 gq ,
(3 00-3 59) 3 55-4 24 (411 4 91 4 54-5 42J 4 97-5 (5 27-6 34 � 5 b2-8 5 71-8 867 (5 90 7 26) (6 03 7 48
30 min 2� 2� 319 3� 4.04 4.36 4 N 4 96 5.29 5.54
(2 OB 2 46) (2 45 2 93 (2 92 3 49 3 29 3 93 (3 88-4 41) 3 97-4 78) 4 22-511) (4 44-5 41 4 70-5 T/) (4 88 6 06)
60 min �� �� �� 2-� Z 69 2 97 3.23 3 48 3 79 4 05
(1 28-1 63) (1 54 1 84) (1 87-2 24 214-2 2 45 2 94 (2 69 8 24) 2.81 S 52) (312-3 80) 3 37-4 14) (3 56 4 42)
2 hf (0 74 �0 905 0 99 1 09) 1 10�1 34 1 27�b4 (1 47 �1 80 (1 �Oi 1 79-2 21 1 94 i2 41 (2 3-�2 (2 8 s2 88
0 580 0�7 0.861 1 00 1 18 1.33 1.48 1 63 1 83 2 00
3-hr (0 528 0 639) (0 637-0 788) (0 785 0 949) (0 911 1 10) (1 07-1 30) 1 19 1 48 1 81-1 82 1 44 1 78 (1 60-2 01 (1 73 2 20)
0.349 0.420 0 519 0 604 0 716 0.808 0.902 0 999 1 13 124
6-hr �0 321 0 383) (0 385 0 461) (0 4T4 0 569) (0 551 0 662) (0 648-0 781 0 727-0 883 0 805-0 984) (0 883 1 09) (0 986-1 23) (1 0� � 36)
12 hr 0.205 0.247 0.306 0 359 0.428 OA87 0.547 0 611 0 699 0 776
(01 SB 0 225 (0 228 0 270 0 280-0 995) 0 327 0 392) 0 387-0 466y (0 438-0 529) (0 487-0 C�94) 0 537-0 863 0 605-0 758 0 660-0 841
�h� 0121 0146 0183 0212 0251 0.282 037a o.347 ,( 0.391 0 427
(0113-0129) (0136 0156) (0171-0196) (0197-0 22'J� (0 233-0 269 0 262 0 302 (0 �0-0 33� (0 320-0 372 0 359-0 421) (0 390 p 458)
2-day 0 070 0.084 0105 O 121 ,( 0143 0160 O 1Tf 0195 0219 0238 �
(0 065-0 075) (0 079 0 091) (0 098 0113) (0113 0130 0132-0153 0148-0171) (0163-0190) (0179-0 210) 0 201 0 236) (0 217-0 25
0 049 0 059 0 073 0 085 0100 O 111 0123 0136 0153 0166
�ey (0 046 0 053) (0 055-0 064) (0 069-0 079) (0 079-0 091 0 092 010 0103-0119) (0114-0132 (0125-0146 0140-0164) 0151 0179)
�ay 0 039 0 047 0 058 0 066 ( 0 078 ( 0 087 0.097 0106 0119 0130
(0 037 0 042) (0 044 0 050) (0 054 0 062) (0 062 0 071 0 072-0 083 0 081 0 093) (0 088-0104) (0 098-0 114 (0109 0128) (0118 0 140
7-day 0 026 0 037 0 037 0 043 0 O50 0 055 0.061 0 067 OA75 0 082
(0 024-0 02 (0 029-0 Q33) 0 035 0 040 (0 040-0 045) 0 046-0 053 0 052-0 059) (0 057-0 O66 0 082-0 072) (0 069 0 081) (0 075-0 088)
10-dey 0 020 0 024 0 028 0 083 0 038 0 042 0.046 0 051 0.056 0 061
(0 019-0 022) 0 023 0 026) (0 027 0 091 0 031-0 035) (0 036 0 041) 0 040 0 045) (0 043 0 O50 0 047 0 054) (0 052 0 O60) (0 056 0 065)
20-day (0 0�3 0 015 0 0�5 0 01 (0 0 8�0 02� 0 020-0 023) 0 023� (Q 23-0 0� 0 027 0 a�1 0 030�Q34) 0 033-0 038) (0 0 5� Q41
0011 0073 0016 0017 0019 0021 OO�i 0024 0027 0028
30-dey 0 011 0 012) (0 013 0 014 (0 015-0 016 0 016-0 018) (0 01 S-0 021 (0 020-0 022 (0 021 0 024) 0 023-0 026) (0 025 0 028) (0 026 0 030)
0010 0011 0013 0014 0016 OA17 0018 0019 0021 0022
45-dey (0 009 0 010) 0 011-0 012) (0 012 0 014 (0 013 0 015) 0 015-0 01 0 016-0 01 (0 017-0 019 U 018 0 021) 0 020-0 022) (0 021 0 024)
60-day 0 009 ,` 0 010 0 011 G 012 '( O Of4 0 Oi5 0 018 0.0'17 O 018 0 019
(0 008 0 009 0 010-0 011) (0 011 0 012) (D 012 0 013 0 013-0 014) (0 014 0 015) (0 015-0 016) (0 016-0 01 �(0 017 0 019) (0 017 0 020)
Preapdatlon frequency (PF� estimates m this ffible are based on frequency analysis of partlal duration �rles (PDS)
Vumbers m parenthes�s are PF esbmates at lower and upper bounds of the 90% ca�'idence fnterval The probabiGly ihat precipitaLon frequency estlmates (for a gNen
iuratbn and average recurrence uroervaq will be greater than the upper bound (or less than ihe lower bound) �s 5% Es6mates at upper bounds are not checked agamst
orobable maximum precipNat�on (PMP) esLmates end may be higher than currently valid PMP vaNes
�lease refer to NOAA AUa614 dot�meM for more irrformat�on
'u
http //hdsc nws noaa gov/hdsc/pfds/pfds�rmtpage htrnl�lat=35 7428&lon=-78 9758&dat 11/30/2011
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G� , va - �oa so� � `i � �, �1-� � �-� =
✓w47� h uA-�
� �
Co 3 e-�'S
Cn� � cFS
-z g y. c�-s
%
30
G�ven Input Data
Shape
Solving for
Diameter
Flowrate
slope
Manning's n
RCP (EX 36 RCP)
10-Year
computed ttesul ts
Depth
Area
wetted Area
wetted Perimeter
Perimeter
velocity
Hydraulic Radius
Percent Full
Full flow Flowrate
Full flow velocity
circular
�epth of Flow
30 0000 in
58 0000 cfs
0 0300 ft/ft
0 0130
20 6041 in
4 9087 ft2
3 5941 ft2
58 6107 in
94 2478 in
16 1374 fps
8 8304 in
68 6803 %
71 0438 cfs
14 4729 fps
�
30
Given Input Data
Shape
Solving for
Diameter
Flowrate
Slope
Manning s n
RCP (EX 36 RCP)
25-Year
computed Results
�epth
Area
Wetted Area
Wetted Perimeter
Perimeter
Velocity
Hydraulic Radius
Percent Full
Full flow Flowrate
Full flow velocity
circular
Depth of Flow
30 0000 �n
64 0000 cfs
0 0300 ft/ft
0 0130
22 2681 in
4 9087 ft2
3 9070 ft2
62 2991 in
94 2478 in
16 3807 fps
9 0308 in
74 2271 %
71 0438 cfs
14 4729 fps
�
30
Given Input Data
shape
solving for
Diameter
Flowrate
Slope
Manning's n
RCP (EX 36 RCP)
100-Year
Computed Results
�epth
Area
wetted Area
wetted Perimeter
Perimeter
velocity
Hydraulic Radius
Percent Full
Full flow Flowrate
Full flow velocity
Circular
Depth of Flow
30 0000 in
72 0000 cfs
0 0300 ft/ft
0 0130
24 9708 in
4 9087 ft2
4 3664 ft2
68 9374 �n
94 2478 in
16 4894 fps
9 1208 in
83 2359 �
71 0438 cfs
14 4729 fps
��
36 RCP (Ex 42 RCP)
10-year
Given Input Data
Shape
Solving for
�iameter
Flowrate
slope
Manning's n
computed Results
�epth
Area
Wetted Area
Wetted Perimeter
Perimeter
velocity
Hydraul i c rtadi us
Percent Full
Full flow Flowrate
Full flow velocity
critical
Critical depth
critical slope
critical velocity
critical area
critical perimeter
Crit�cal hydraulic
Critical top width
Specific energy
Minimum energy
Froude number
Flow cond�tion
�ircular
Depth of Flow
36 0000 in
63 0000 cfs
0 0230 ft/ft
0 0130
20 5742 in
7 0686 ft2
4 1756 ft2
61 7149 in
113 0973 in
15 0875 fps
9 7431 in
57 1507 %
101 1531 cfs
14 3102 fps
Information
30 6351 in
0 0056 ft/ft
9 4127 fps
6 6931 ft2
81 8188 in
radius 11 7797 in
36 0000 in
5 2530 ft
3 8294 ft
2 2556
Supercritical
�1
36 RCP (Ex 42 RCP)
25-year
Given Input Data
Shape
solving for
Diameter
Flowrate
slope
Manning s n
Computed Results
Depth
Area
wetted Area
Wetted Perimeter
Perimeter
velocity
Hydraulic Radius
Percent Full
Full flow Flowrate
Full flow velocity
critical
Critical depth
Crit�cal slope
critical velocity
Critical area
critical perimeter
Critical hydraulic
critical top width
specif�c energy
Minimum energy
Froude number
Flow condition
circular
�epth of Flow
36 0000 in
69 5000 cfs
0 0230 ftjft
0 0130
21 9206 in
7 0686 ft2
4 5066 ft2
64 4533 in
113 0973 in
15 4217 fps
10 0686 in
60 8906 %
101 1531 cfs
14 3102 fps
Information
31 8090 in
0 0058 ft/ft
9 9477 fps
6 9865 ft2
84 1667 in
radius 11 9532 in
36 0000 in
5 5260 ft
3 9761 ft
2 2216
Supercritical
t2
36 RCP (EX 42 RCP)
100-year
G�ven Input Data
Shape
solv�ng for
Diameter
Flowrate
Slope
Manning s n
Computed Results
�epth
Area
wetted Area
Wetted Perimeter
Perimeter
velocity
Hydraulic Radius
Percent Full
Full flow Flowrate
Full flow velocity
Circular
�epth of Flow
36 0000 in
78 4000 cfs
0 0230 ft/ft
0 0130
23 8063 in
7 0686 ft2
4 9603 ft2
68 3727 in
113 0973 in
15 8055 fps
10 4469 in
66 1286 %
101 1531 cfs
14 3102 fps
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Grass Swale #1
2-yr
Given Input Data
shape
solving for
Flowrate
Slope
Manning's n
Height
Bottom width
�eft slope
R�ght slope
Computed Results
Depth
velocity
Full Flowrate
Flow area
Flow perimeter
Hydraulic radius
Top width
,area
Perimeter
Percent full
Trapezoidal
Depth of Flow
0 7900 cfs
0 0410 ft/ft
0 0330
1 0000 ft
0 0000 ft
0 3300 ft/ft (v/H)
0 3300 ft/ft (v/H)
critical znformation
�ritical depth
Critical slope
critical velocity
critical area
critical perimeter
Critical hydraul�c radius
Critical top width
Specif�c energy
Minimum energy
Froude number
Flow condition
0 3177 ft
2 5836 fps
16 8164 cfs
0 3058 ft2
2 0273 ft
0 1508 ft
1 9252 ft
3 0303 ft2
6 3821 ft
31 7659 %
0 3351 ft
0 0308 ft/ft
2 3218 fps
0 3403 ft2
2 1386 ft
0 1591 ft
2 0308 ft
0 4214 ft
0 5026 ft
1 1429
Supercritical
� (0
Grass Swale #2
2-yr
Given Input Data
Shape
Solving for
Flowrate
slope
Manning s n
Height
Bottom width
�eft slope
Right slope
computed Results
Depth
velocity
Full Flowrate
Flow area
Flow perimeter
Hydraulic radius
Top width
Area
Perimeter
percent full
Trapezoidal
Depth of Flow
2 0300 cfs
0 0060 ft/ft
0 0330
1 0000 ft
1 0000 ft
0 3300 ft/ft (v/H)
0 3300 ft/ft (v/H)
Critical znformation
Critical depth
Critical slope
critical velocity
Critical area
Critical perimeter
critical hydraulic radius
Critical top width
specific energy
M�nimum energy
Froude number
Flow condition
0 5074 ft
1 5764 fps
9 3905 cfs
1 2878 ft2
4 2386 ft
0 3038 ft
4 0755 ft
4 0303 ft2
7 3821 ft
50 7450 %
0 3558 ft
0 0270 ft/ft
2 7454 fps
0 7394 ft2
3 2708 ft
0 2261 ft
3 1564 ft
0 5461 ft
0 5337 ft
0 4944
subcritical
�
Grass Swale #2
10-yr
Given Input Data
Shape
solving for
Flowrate
slope
Manning's n
Height
Bottom width
�eft slope
Right slope
computed Results
Depth
velocity
Full Flowrate
Flow area
Flow perimeter
Hydraulic radius
Top width
area
Perimeter
Percent full
Trapezoidal
pepth of Flow
2 5900 cfs
0 0060 ft/ft
0 0300
1 0000 ft
1 0000 ft
0 3300 ft/ft (v/H)
0 3300 ft/ft (v/H)
0 5432 ft
1 8018 fps
10 3296 cfs
1 4375 ft2
4 4669 ft
0 3218 ft
4 2923 ft
4 0303 ft2
7 3821 ft
54 3231 %
Critical znformation
Critical depth 0 4031 ft
Critical slope 0 0216 ft/ft
Critical velocity 2 8927 fps
crit�cal area 0 8954 ft2
Critical perimeter 3 5724 ft
Critical hydraulic radius 0 2506 ft
Critical top width 3 4428 ft
Specific energy 0 5937 ft
Minimum energy 0 6046 ft
Froude number 0 5489
Flow condition subcritical
0
� ° � � DATE Page 1
� 12/9/2011
PROJECT NAME PROJECT NO
260 American Court 183 11
BY
PEH
Storm Outlet Structure
No = ��tlei �'# Qio/Glfull = 0 50
Pipe Dia= 36 m VNfull = 1 00
Qto = �8 DO cfs V= 16 3 fps
Qfuli = 1 a� � cfs
Vfull = #�i �4 fps
From Fig 8 06 b 1 Zone =���''�-r5
From Fig 8 06 b 2 D5o = 23 in
DM,ax = 34 5 in
Riprap Class = 2
t Apron Thickness = 30 m
3 Apron Length = 30 0 ft
Apron Width = 3xDia = 9 ft(reqwred)
L gth
� ° � � DATE
� 12/9/2011
PROJECT NAME PROJECT NO
260 American Court 183 11
BY
PEH
Storm Outlet Structure
No = Quflei #2 Qio/Ofull = 0 41
Pipe Dia= 42 in VNfull = 0 94
C!� o= 63 00 cfs V= 15 0 fps
Qfuil = 152 58 cfs
Vfuil = 1S 8� fps
From Fig 8 06 b 1 Zone = � 5
From Fig 8 06 b 2 D5o = 23 m
Dnn,4x = 34 5 in
Riprap Class _ 2
r Apron Thickness = 30 m
3 Apron Length = 35 0 ft
Apron Width = 3xDia - 10 5 ft(required)
Length I
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