20061042 Ver 3_Stormwater Info_20111021

WITHERS &- RAVENEL c-s3z
October 20, 2011
Annette Lucas
NCDENR-Division of Water Quality
512 N. Salisbury Street
Raleigh, NC 27626
Re: Ashton Hall Subdivision — Phases 3 & 4
Durham, NC
DWQ Project # 06-1042 v.3
W&R Project # 02090500.0
Dear Ms. Lucas:
ENGINEERS 1 PLANNERS I SURVEYORS
Please find attached five (5) copies of the grading and storm drainage plans, along with BMP outlet
details for the above -referenced project. This information is provided in response to your September
23, 2011 letter requesting additional information, a copy of which is provided for reference. The
additional information requested is listed below, followed by a written response:
Additional Information Requested. -
1. Per the requirements of the Neuse River riparian buffer rules, you must show that this site
meets diffuse flow requirements with level spreader or other BMP per Chapter 8 of the BMP
Manual (see http://Portal.ncdenr.org/weblwglwslsulbmp-manual). The PCN application
indicated that a diffuse flowplan was included but DWQ could notlocate one. Please provide a
diffuse flow plan.
The original submittal included copies of the grading and storm drainage plan (2 sheets), which was
submitted for the purpose of illustrating the site grading and configuration of BMP's and level
spreaders for demonstration of conformance with the diffuse flow requirement. The attached plans
include the following design drawing sheets, which include additional detail information:
• Cover Sheet;
• Overall Site Plan;
• Grading & Storm Drainage Plan ( 1 of 2);
• Grading & Storm Drainage Plan ( 2 of 2);
• BMP #7 — Wet Pond Detail (1 of 2);
• BMP #7 — Wet Pond Detail (2 of 2);
• BMP #8 — Wet Pond Detail (1 of 2);
• BMP #8 — Wet Pond Detail (2 of 2);
• BMP #io — Wet Pond Detail (1 of 2);
• BMP #io — Wet Pond Detail (2 of 2);
• BMP #11 — Wet Pond Detail (1 of 2);
• BMP #11 — Wet Pond Detail (2 of 2);
• Storm Drainage Detail Sheet.
iii MacKenan Drive 1 Cary, NC 27511 1 tel:[phone] I fax:[phone] I www.withersravenel.com
1410 Commonwealth Drive I Suite 101 1 Wilmington, NC 28403 1 tel: [phone] fax: [phone]
06 D Gallimore Dairy Road 1 Greensboro, NC 27409 1 tel: [phone]

As umm a rydescription of each outlet and its diffuse flow provisions are listed below. Also, please note
that an additional 50' of stream buffer width is provided beyond the 5o' Neuse buffer in accordance
with City of Durham stream buffer requirements. There are no proposed impacts or grading within any
of these buffers, except for the one (i) perpendicular roadway crossing.
BMP #7:
The water quality volume from BMP #7 is split out to a 1o' level spreader. An engineered filter strip
with a 4.3% slope is provided outside the buffer. Larger storm events are conveyed through a
bypass pipe which discharges to a plunge pool dissipater.
BMP #8:
The discharge from BMP #8 occurs upstream of a roadway crossing which is located upstream of
the Neuse buffer. The outflow from this BMP enters a natural wetlands area upstream of the Neuse
River Buffer. A stable outlet with plunge pool dissipater is provided for this BMP. Per current
NCDWQ Policy, stormwater flows which enter wetlands (outside of the NRB) at a non erosive velocity
(less than 2 feet per second) have been deemed to be in compliance with the diffuse flow
regulations. The attached calculations show that the expected velocity, at the edge of the NRB, for
the 10 -yr storm is 1.86 ft/sec, thereby complying with current policies.
BMP #1o:
The water quality volume from BMP #10 is split out to a 1o' level spreader. An engineered filter strip
with a 2.3% slope is provided outside the buffer. Larger storm events are conveyed through a
bypass pipe which discharges to a plunge pool dissipater.
BMP #11:
The water quality volume from BMP #11 is split out to a 1o' level spreader. An engineered filter strip
with a 1.3% slope is provided outside the buffer. Larger storm events are conveyed through a
bypass pipe which discharges to a plunge pool dissipater.
If you need any additional information, or have any questions, please give me a call at 919-469-3340
Sincerely,
;W?ITHRS & RAVENEL, INC.
Brad Hart, PE
cc: Patrick Allen — Beazer Homes Corp.
file
ill MacKenan Drive I Cary, NC 27511 I tel -919.469.3340 I fax:[phone] I www.withersravenel.com
1410 Commonwealth Drive I Suite 1o1 I Wilmington, NC 28403 I tel: [phone] I fax: [phone]
416 D Gallimore Dairy Road I Greensboro, NC 27409 1 tel: [phone]

U
BMP 10 Bypass
Project Description
Friction Method
Solve For
Input Data
Roughness Coefficient
Channel Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
Results
Normal Depth
Flow Area
Wetted Perimeter
Top Width
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow Type
GVF Input Data
Downstream Depth
Length
Number Of Steps
GVF Output Data
Upstream Depth
Profile Description
Profile Headloss
Downstream Velocity
Upstream Velocity
Normal Depth
Critical Depth
Channel Slope
Critical Slope
10/10/2011 8:09:30 AM
Manning Formula
Normal Depth
Subcritical
0.085
ft
0.06400
ft/ft
10.00
ft/ft (H:V)
10.00
ft/ft (H:V)
50.00
ft
28.24
ft3/s
0.29 ft
15.19 ftz
55.78 ft
55.75 ft
0.21 ft
0.17910 ft/ft
1.86 ft/s
0.05 ft
0.34 ft
0.63
0.00 ft
0.00 ft
0
0.00 ft
0.00
ft
Infinity
ft/s
Infinity
ft/s
0.29
ft
0.21
ft
0.06400
ft/ft
0.17910
ft/ft
Bentley Systems, Inc. Haestad Methods Solution Center Bentley FlowMaster [08.01.071.00]
27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA [phone] Page 1 of 1

Strickland, Bev
From: Hart, Brad [[e-mail]]
Sent: Monday, October 24, 2011 9:30 AM
To: Strickland, Bev
Subject: FW: DWQ# 06-1042 v.3
Attachments: Public Ftp Instructions. pdf
Beverly,
Ken Jesneck forwarded me your request for the scan copies of the Ashton Hall plans that we submitted last
week. I have attached a link to our FTP site, where you will find them. Just click the link in the attachment and
then look under the "Ashton Hall" folder. Please let me know if you have any problems downloading the files.
Thanks
Brad
Brad Hart, PE, LEED AP
WITHERS (�r RAVENEL
111 MacKenan Drive I Cary, NC 27511
Phone: [phone] Fax: [phone]
Direct: 919.535.5164
[e-mail]
www.withersravenel.com
From: Strickland, Bev[mailto:[e-mail]]
Sent: Friday, October 21, 20113:58 PM
To: Jesneck, Ken
Subject: RE: DWQ# 10-0012 V2 Water Gardens Village
It worked great. Could I get access to the Ashton Hall plans that were just submitted today also?
Thanks
Beverly Strickland, Administrative Officer
Division of Water Quality - Program Development
N.C. Department of Environment and Natural Resources
Mail Service Center 1650, Raleigh, NC 27699-1650
Phone# [phone]
Email Address: Bev.Stricklandgncdenr.gov
Main Line # [phone]

Fax Line # [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Lav and may be disclosed to third parties.
From: Jesneck, Ken [mailto:[e-mail]1
Sent: Friday, October 21, 20112:48 PM
To: Strickland, Bev
Subject: RE: DWQ# 10-0012 V2 Water Gardens Village
Bev,
The TIFF versions of the signed plans are downloadable from out FTP site. I have attached the instructions to access the
site. The files are located in the Water Garden subdirectory.
Let me know if you problems with downloading the files.
Thanks,
Ken Jesneck, PE, LEED AP
WITHERS ';r RAVENEL
111 MacKenan Drive I Cary, NC 27511
Phone: [phone] Fax: [phone]
Direct: 919.535.5139 1 Mobile: [phone]
kiesneck D-withersravenel.com
www.withersravenel.com
N t_
tje' . . 't'. 3 , > >J
pt o` -I,
,., pis
From: Strickland, Bev [ma iIto: [e-mail]
Sent: Friday, October 21, 20112:26 PM
To: Jesneck, Ken
Subject: DWQ# 10-0012 V2 Water Gardens Village
Please provide a data CD or ftp site with a full size version of the signed plans in TIF Group 4 format (black and
white 300dpi, not grayscale or color) for the project listed above. If the plans are too large to store in TIF
format, they can be stored in PDF.
Beverly Strickland, Administrative Officer
Division of Water Quality - Program Development
N.C. Department of Environment and Natural Resources
Mail Service Center 1650, Raleigh, NC 27699-1650

Phone# [phone]
Email Address: Bev.Strickland(cyncderingov
Main Line # [phone]
Fax Line # [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties.

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10/20/11 BMP 7 - WET POND DETAIL (1 of 2) SHT 8.1
BMP 7 - WET POND DETAIL (2 of 2) SHT 8.2
BMP 8 - WET POND DETAIL (1 of 2) SHT 8.3
BMP 8 - WET POND DETAIL (2 of 2) SHT 8.4
BMP 10 WET POND DETAIL (1 of 2) SHT 8.5
BMP 10 WET POND DETAIL (2 of 2) SHT 8.6
7 BMP 11 - WET POND DETAIL (1 of 2) SHT 8.7
BMP 11 WET POND DETAIL (2 of 2) SHT 8.8
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� �, .'I r -_ -_ , _.� I I I I . . . . 18,772 SF �
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, ::) - __ --- --- � ,- -_ �.,. . � 11 3AV ', TRE ION � \, \ N . . 11, .\ ...... . * . .... [.* * - , - F.... I, . 1<�% - " "I -45 SF + 50 LOTS 0 2,500 SF) :
: .. I , / I I ­_ _ __ ____ __ - ­ " ,, �._ � . .\. I .( ... LOTS: 222,680 SF (24 LOTS X 3,4
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: 1-1 _­ .. � � � k7 . ! I L ? \ I M. �, - * It:. *. ,.", TOTAL: 379,921 SF (8.721 AC.)
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______ / / I t '. ) -r / � / t8 /2 1 1 � \ � \ \ . .. . ... '. .1, ,� .4 1�1 . . / . . . . , . . . - . - . � - 1 . At a minimum, the stormwoter design details for this project shall be governed by the minimum standards of the most
� _-1 T -1 11 iL I .. ..'... . � .. ..A,.. . V. , I . . . . . . t recent edition of the City of Durham (City) Reference Guide for Development (RGD) and any Letters to Industry (posted on !
i N �.: -1 - , , , . . . . . . t. - the City's website) or supplemental notifications of RGD updates (also posted on ebsite) that are in effect the �
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C3 __ � 9 - I ,,- �IMIT! � . - \ \ \ i I . . . ! I . . , . . . dote Construction Drawings are first received for review by the City. Non-complionce with any of these minimum standards
-, __ / -.---.Z. .�. -1.1.1-1 It will be the responsibility of the owner to correct any deficiencies
M I - ­_ . . . .. :. :.":. ;111. . . ��_�_: .. ­- . .­­ (. . I
I e I ;�___�_ . I I / : - . . . . . . . I . . . . � Ili ... ; noted during the life of this project to the satisfaction of the City.
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I < . I I .1 Ill I ? /I / / ! . . I. 4"k - - shall render the approval of such items null and void.
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I cr I � e .- 'A. :- i/ - . f- 2. Stormwater Best Management practices (BMP's) permit fees, the executed Stormwater Facility Agreement and Covenants
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= - __ -.-- _. 11 I ; ol�_ - I � D : :.�-- .- _11 �: �::: � �::::��.. . I , ., (prepared by the City of Durham Stormwoter Services Section) and either a payment into the Storwmoter Replacement Fund
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2 ...". , � �i 2159 1 - . ... � , W 4, 4� :4;,:!`*:.tV! A 4 , - - . . , , .� ........ I development is not allowed to commence until these items are provided in accordance with the terms and conditions outlined
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i � - __1 ; , ", � . .. , - -.,..,:1.-�- , le . . �� every stormwoter 8 ,ed in the development at the first submittal of the construction drawings. �
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i / � , ." - . . 1.111' The as -built shall be submitted in accor once with the City of Durham BMP ' Certifying Eng;neer (EICE) grom, refer to
_____" - i" 1:;. :1.;. .. .: , * . .. ...*. " rt��' , , , P.4:;�. .,�,. . . .1 . . . \ . . . . . "?.. Section 8.6, SMP Certifying Engineer Proar irn for Stormw e__QK g�f �urhLg
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� I �_ . . . . . . . . . ,; . . . . . . . . I .i. - I hall ,�,. of the Reference Guide for
! I / 14 ) ." " :-: v4 .1, , " , '.7 , � ! Development. _ ____ , be inspected and approved by the S3
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I -I- - '\ i6 , .- ... : � : . I . . . . . . . N .. I . . _. . .4 . ;f* . ., prior to issuance of any certificates of occupancy . or certificates of compliance for the project. I
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0 I— N , I 11 ( \ \ 7 . I.,- :. :: . . . ... . . . .. ." - - -� - - -- - - - .- . . . . . ... �% . . '. . ", . . . . . W. . T11_. 4. A completed City of Durham Design Summary is required for each stormwater best management practice no later than at
.0 ­ -­ __ -.-. __ -\ � ft \ .�, / � -_ 11R I 7 . , .. . :- :- : . � - - , -:� - - 7 . . . I . . . �. .. .� .i , ��i� --�.�-\�--. . . the first construction drawing submittal.
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a , - -1 - -, I � . - �_ - \ I � ' ' / ... - ��NCINP - .-�'. 1. * - * I* -'.'-'-' . . . .
� ­" ­ ­­ ­_ 1) � - _� - -7 ­ \ �VPIR')J C780?0�NDARYh�UFF R - :-__.1_4- 't I/ .... . . . . . /. . '. . . . . . . - . - . - . I. - . - . / - . f Preliminary Plot submittal. All BMP designs will be reviewed and and approved during the construction drawing submittal
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1� 1 J7�i - rl-91222ff-lmlmlml �4_,M - ,i I \ , �� - . . - �- - - .", - - - . . . , . process. If, at the time of CD submittal, it is found that the propo ed BMP(s) is(are) undersized or otherwise insufficient
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�, 11 ,11 .1 . . . . . . I . -� . . . .. . . . . � . . . . . . . . . . . I , insufficient or unsuitable and alternative BlMPs ore required. Diffuse flow of runoff shall be maintained in the buffer by
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I - I I 1- // .'.. 11 .. ­ .r �" , 1-11 Stormwater Management Notes:
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3 I I 11 I I \ � <' . ..� I - I '-,11 " 1. At a minimum, the stormwater design details for this project shall be governed by the minimum standards of the most �
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(N 1 I , � -, I ­ I . . - ' ' . __ --f- - " .4 �-. '­.:'.' --:'-- - - "'� . '., recent edition of the City of Durham (City) Reference Guide for Development (RGD) and o�ny Letters to Industry (posted on
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1 2 L� � � I ' , � � $"�_._ .-,-. \ f ?.'. i. V .112 � .1 ' /1. 71 . .".. - - I � _0 � I -v -, -, - ��-' , , *.'� .'.', shall render the approval of such items null and void. It will be the responsibility of the owner to correct any deficiencies �
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U . , I i I ) J I r L11, �_'- I �/' . '. . , Z ... ,f� . �'. . 1, . . . ... /?' . . noted during the life of this project to the satisfaction .of the City.
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- \ i / . I 11 ft � i I ... n I I . . / . .'. ./. ql.'. . . . . , � . . -, 2. Stormwater Best Management Practices (BMP's) permit fees, the executed Stormwoter Facility Agreement and Covenants
10 \ / / / I/ I 1 97 � . / - * -i .. - �' ­�/v - - . . I , * ,,:'*'. (prepared by the City of Durham Stormwater Services Section) and eitl into the Storwmater Replacement Fund
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3 1� - 1. � � I J. I 1 /2 f , _J V %_0 ?I ... . . .�. 1, .' - � -'r'_�':�Z­� 7i�=' - i .. ... or the proviision of on alternate security ore required for all BMPs associated with this development. Construction of the
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� \� , I � ' .1 . 11 I I _"' / I - . . . I - I - ftl . ..". I I . . . . . ;"' " .-.-. _'�. . development is not allowed to commence until these items ore provided in accordance with the terms and conditions outlined .
. I �t, , / 11 . I / I / I P '.- 'P f ...'/ .... I.P. . . . 'Z. � ­­ . ............... .'. . / ..... in the Stormwoter Facility Agreement and Covenants. The designer shall submit a certified construction cost estimate for
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; _. i i r i . . . . . ormwater BMP proposed in the development at the first submittal of the construction drawing$.
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\ / I I/ I "' i I �"" ! -,,i - 4 -/-* . .. 1, " /' *_ :.?. -'e. I - 3, An os-byilt certification for the stormwoter best management proctice(s) (BMPs), provided by the design engineer, is rsquired.
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� . � // ) // .?///// I _W . -vil ' ' ' '�' - " . '/ .. . . .. �r "_ - The as -built shall be submitted in actor once with urhom QMP Certifiing Engineer (RCE) Program, refer to . I
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Z , I f 11 I- i -1 " " � � , "T-. . '� � . . . . _�' . Section 8.6, Bill CertifAng Engineer Progro for Stormwater BMPs in the City of Durh m, of the Reference Guide for
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I ; I I .� // * .; .... 11 Ju JF'L hU LE! -1..�A�-I.-. " '." - "' / ' ' * '. . . ,11. :11. -4 � 4. A completed City of Durham Design Summary is required for each stormwoter best management practice no later than at
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Ir ) I � r I 11 i 11 I .. - I I 11 -` FENCII , ' / / R�EF?.�Qvlr� /( I . ' - K Preliminary Plot submittal, All BMP designs will be reviewed and and approved during the construction drawing submittal
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i � � 11 � - � () -, � - - or unsuitable for the site, it is the responsibility of the applicant to ensure that the applicable stormwoter ordinance
i d I 11 � ' / '� . .j� . .. . V . Z* " " ,_ . -� . - . .. 1Z" � requirements ore met. A revised site plan or preliminary plot may be required if the originally proposed BMPs are found
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I 11 I I I I '/ . . . bAVI: _� � � � , , I I IY - - '_ - -1, - insufficient or unsuitable and alternative BMPs ore required. Diffuse flow of runoff shall be maintained in the buffer by
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0 I I � I i I I i. I/* . . . . . �'. *. *. *,�REA. *. qM \ k �00 '� �')`+ � ) ,I 1. __ dispersing concentrated flow and reestablishing vegetation. A level spreader needs to be designed to bring back flows to
2E 1"... 11 . I i I t I . . . . . . . I 9 ... . . . . . . ... * 191.,-7-7 'I I � I - ' + .... . I .'.... /' ' 17' ' ' ' "' ' i4 '. .. I . - . " "� . .-", __ ,.,. sheet flow condition before it. Periodic corrective actions will be enforced to impede erosion gullies.
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. ASHTON HALL - PHASES 3 & 4 GRADING & STOR"M DRAINAGE PLAN 2 OF 2 W1 I mr.m= & ric"ENOEL
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11 I EN INEER I L 4.2
DURHAM DURHAM COUNTY NORTH CAROLINA , I I i I 1 1 1 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832 I
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FINISHED GRADE
20' MIN.
0 SELECT FILL
TOP DIAPHRAGM = 352.5
1 I1
(TEMPORARY)TEMPORARY)
2 2
T - r T : �,...
ASM C 33 o NCDO 2S SAND
MINIMUM LIMITS OF
EXCAVATION
FOR
� 2..
4"0 SLOTTED PVC
4"
SEEPAGE DIAPHRAGM DRAIN a" 24" RCP e• a"
(0.010 INCH SLOT WIDTH) °
^. [7 Q �i4 Lti 16
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36" 8" 8 a 36"
#57 WASHED STONE
ENVELOPE
50"
4,000 PSI CONCRETE
CONCRETE CRADLE & DIAPHRAGM DRAIN DETAIL
SCALE: N.T.S.
DOWNSTREAM
FACE OF DAM
ASTM C-33
1 OR NCDOT
j
2S SAND
... 4"0 SLOTTED PVC
SEEPAGE DIAPHRAGM DRAIN
4"0 SOLID PVC SEEPAGE ; ,'. (0.010 INCH SLOT WIDTH)
DIAPHRAGM DRAIN PIPE. ;''; 4 PVC CAP
DAYLIGHT THRU 24"s,'• CAST IN—PLACE
HEADWALL. CONCRETE PIPE
24" RCP PIPE CRADLE
DETAIL OF BLIND SWALE AT LEVEL SPREADER
P.I.N. 0850-03-04-4412 (PORTION) '
TYPICAL PER 50LF
O -0 O�.O OHO O`.O—O..—b 0� O
349.1
u 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ��- 40 FRAGRANT WATER LILY
a o a u 0 o-o0°u O a u u U -0-0-0-
Z) oQo 0
O O O O O O O o + + + ++ + + + + + +
uj +++++++ + 0 C) 0 o O o + + + + + + + + + + 40 PICKEREL WEED
+ + + + + + + + + + + + + + + + + + + + + +
30 HARD STEM BULRUSH
/ 350.17
............------— -- — -- NORMAL POOL 350.50
PLANT LIST
DEEPWATER EMERGENT COMMUNITY (1'-3' DEPTH)
BOTANICAL NAME COMMON NAME SIZE HT.
PONTEDERIA CORDATA PICKEREL WEED QUART 2' O.C.
NYMPHAEA ODORATA FRAGRANT WATER LILY BARE ROOT 3' O.C.
SCiRPUS ACUTUS HARD STEM BULRUSH QUART 2'0.C.
AQUATIC SHELF PLANTING DETAIL
N.T.S.
6.3 LFx2"x2"x1
TOP OF RISER
#4
(TYF
THIS SECTION OF TRASH RACK ELEVATION VIEW
BE HINGED TO ALLOW ACCESS
(OPENING TO BE CENTERED OVER HINGE
THE STEPS
PAD LOCK
A
lmii FlAr MEN ON
mrijlmmmm 000
PLAN VIEW
NOTES:
1. ALL REBAR TO BE #4 REBAR.
2. ALL REBAR AND ANGLES TO BE GALVANIZED WITH A BITUMINOUS COATING.
3. THE HOT—DIPPED, GALVANIZED 2"x2%1/4" ANGLES SHALL BE WELDED TO THE REBAR TRASH
RACK. ONCE WELDED, THE ENTIRE ASSEMBLY SHALL BE PLACED ONTO THE MANHOLE RISER
WITH ANGLES SITTING DIRECTLY ON TOP OF THE RISER.
4. GAPS TO BE NO SMALLER THAN 6"X6" OR LARGER THAN 12"02"
BOLT
#4 REBAR TRASH RACK (ABOVE)
ANCHOR TRASH RACK TO MANHOLE WALL WITH FOUR EQUALLY SPACED
HOT -DIPPED GALVANIZED STEEL CLAMPS. EACH CLAMP ATTACHED TO MANHOLE
RISER BY 2-3"xt/4"CONCRETE ANCHOR BOLTS EACH CLAMP TO BE COATED
W/ A BITUMINOUS COATING,
TRASH RACK DETAIL
N.T.S.
I�
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2
SEEPAGE DIAPHRAGM & DRAIN DETAIL
a SCALE: N.T.S.
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NJA GAS
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Job No.
BDH
02090500.0
in
0
10' LONG CONCRETE LEVEL SPREADER.
LEVEL LIP ELEV.=346.00
DISSIPATOR APRON TO BLIND SWALE
t,
SEE DETAIL ON SHT.15.1.
7' L X 4' W X 9" DEEP, WITH CL. A RIPRAP,
d50=3" W/ FABRIC LINER.
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10'X10' BLIND SWALE TO BE PLANTED
WITH WETLAND VEGETATION PER
3' 4'
3'
QTY & SPECIES SHOWN.
PLAN VIEW OF BLIND SWALE
NOT TO SCALE
6" DIP INFLOW PIPE
TO BLIND SWALE
OUTFLOW ACROSS
LEVEL LIP
10'
10' LONG CONC. LEVEL SPREADER.
LEVEL LIP ELEV.=346.30
SEE DETAIL ON SHT.15.1
SECTION THROUGH BLIND SWALE
NOT TO SCALE
6.3 LFx2"x2"x1
TOP OF RISER
#4
(TYF
THIS SECTION OF TRASH RACK ELEVATION VIEW
BE HINGED TO ALLOW ACCESS
(OPENING TO BE CENTERED OVER HINGE
THE STEPS
PAD LOCK
A
lmii FlAr MEN ON
mrijlmmmm 000
PLAN VIEW
NOTES:
1. ALL REBAR TO BE #4 REBAR.
2. ALL REBAR AND ANGLES TO BE GALVANIZED WITH A BITUMINOUS COATING.
3. THE HOT—DIPPED, GALVANIZED 2"x2%1/4" ANGLES SHALL BE WELDED TO THE REBAR TRASH
RACK. ONCE WELDED, THE ENTIRE ASSEMBLY SHALL BE PLACED ONTO THE MANHOLE RISER
WITH ANGLES SITTING DIRECTLY ON TOP OF THE RISER.
4. GAPS TO BE NO SMALLER THAN 6"X6" OR LARGER THAN 12"02"
BOLT
#4 REBAR TRASH RACK (ABOVE)
ANCHOR TRASH RACK TO MANHOLE WALL WITH FOUR EQUALLY SPACED
HOT -DIPPED GALVANIZED STEEL CLAMPS. EACH CLAMP ATTACHED TO MANHOLE
RISER BY 2-3"xt/4"CONCRETE ANCHOR BOLTS EACH CLAMP TO BE COATED
W/ A BITUMINOUS COATING,
TRASH RACK DETAIL
N.T.S.
I�
N
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SEEPAGE DIAPHRAGM & DRAIN DETAIL
a SCALE: N.T.S.
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Scale
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Date
NJA GAS
10/20/11
Checked By
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02090500.0
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SMP 7_
WET POND DETAIL 2 4F 2 WlmulmHERS
Sheet No.
ENGINEERS I PLANNERS I .SURVEYORS 8.2
T A 1919-469-3340
DURHAM DURHAM COUNTY NORTH CAROLINA, 111 MacKenan Drive Cary, North Carolina 27511 tel: www.withersravenel.com License No. C-0832

Y
Revision
Designer
W&R
Scale
AS NOTED
Drawn By
Date
NJA GAS
10/20/11
Checked By
Job No.
BDH
02090500.0
DOWNSTREAM
FACE OF DAM
ASTM C-33
OR NCDOT
3 r 2S SAND
4"0 SLOTTED PVC
" SEEPAGE DIAPHRAGM DRAIN
4"0 SOLID PVC SEEPAGE ': s 'i :: (0.010 INCH SLOT WIDTH)
DIAPHRAGM DRAIN PIPE. - 4" PVC CAP
DAYLIGHT THRU 24" - CAST IN–PLACE
HEADWALL. CONCRETE PIPE
24" RCP PIPE CRADLE
SEEPAGE DIAPHRAGM & DRAIN DETAIL
SCALE: N.T.S.
4"0 SLOTTED PVC 4.. 811 8111 4„
P AP RAGM DRA N
5EE AGE DI H I 36" RCP
(0.010 INCH SLOT WIDTH)
• x
e
36„ .04 a • 3
#57 WASHED STONE o
ENVELOPE •o a4 p
66°
4,000 PSI CONCRETE
CONCRETE CRADLE & DIAPHRAGM DRAIN DETAIL
SCALE: N.T.S.
6„
TYPICAL PER 50LF P.I.N. 0850-03-04-4412 (PORTION)
- -- - - -360.42
v o o O O O O O O O o 0 0 o 0 o O O ^—n 40 FRAGRANT WATER LILY
o O O O O O O O O + + + + + + + + + + +
d m +++++++ + 0 0 0 0 0 0 + + + + + + + + 40 PICKEREL WEED
+ + + + + + + + + + + + + + + + +
i -...-.._. - f 361.42 30 HARD STEM BULRUSH
, _....... _ . ,.. .,, ,,.. m...m — 361.75 (NORMAL POOL)
PLANT LIST
DEEP WATER EMERGENT COMMUNITY W-3' DEPTH)
BOTANICAL NAME COMMON NAME SIZE HT.
PONTEDERIA CORDATA PICKEREL WEED QUART 2'0.C.
NYMPHAEA ODORATA FRAGRANT WATER LILY BARE ROOT 3' O.C.
SCIRPUS ACUTUS HARD STEM BULRUSH QUART 2'0.C.
AQUATIC SHELF PLANTING DETAIL
N.T.S.
HANDWHEEL
TRASH RACK
(SEE DETAIL)
365.00
TOP OF RISER
kf
(2) 6"X4' ORIFICES 6" (TYP.)'
ELEV. 363.50 (2) @ 4'
NWSE = 361.75
4'
4" DIP 90• ELBLOW BOX RISER
INVERTEDDRAWDOWN (PRE–CAST SECTIONS)
W/2" ORIFICE PLATE
8" DIA. PLUG VALVE
36" 0–RING RCP
8" DIP INV. . I — il
ELEV. _ 359.00
BARREL INV.=358.00
4 ' ° iV
8" DIP a °
a
6'
6'X6' CONCRETE
ANTI -FLOTATION BLOCK
WET POND #8 RISER STRUCTURE DETAIL
N.T.S.
6.3 LFx2"x2"x1
TOP OF RISER
#4
(TYF
THIS SECTION OF TRASH
BE HINGED TO ALLOT
(OPENING TO BE CENTEI
TI-
PAD
F
PAD LOCK
#4 REBAR WELDEC
(TYP•) (SEE NOTES
PLAN VIEW
NOTES:
1. ALL REBAR TO BE #4 REBAR.
2. ALL REBAR AND ANGLES TO BE GALVANIZED WITH A BITUMINOUS COATING.
3. THE HOT -DIPPED, GALVANIZED 2"x2"x1/4" ANGLES SHALL BE WELDED TO THE REBAR TRASH
RACK. ONCE WELDED, THE ENTIRE ASSEMBLY SHALL BE PLACED ONTO THE MANHOLE RISER
WITH ANGLES SITTING DIRECTLY ON TOP OF THE RISER.
4. GAPS TO BE NO SMALLER THAN 6"X6" OR LARGER THAN 12"x12"
BOLT
#4 REBAR TRASH RACK (ABOVE)
ANCHOR TRASH RACK TO MANHOLE WALL WITH FOUR EQUALLY SPACED
HOT—DIPPED GALVANIZED STEEL CLAMPS. EACH CLAMP ATTACHED TO MANHOLE
RISER BY 2-3"x1/4" CONCRETE ANCHOR BOLTS EACH CLAMP TO BE COATED
W/ A BITUMINOUS COATING.
TRASH RACK DETAIL
N.T.S.
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Sheet No.
ASHTONHALL PHASES 3 & 4 SMP 8 WET
OETAI L 2 OF 2
ENGINEERS I PLANNERS I SURVEYORS 8®4
DURHAM DURHAM COUNTY NORTH CAROLINA
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832

390
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02090500.0
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SPILLWAY TO BE*[NkOR
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W4T}J PJMANENT'SYNTHEMAT.
-20'.WIDFBOTTOM
99
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REPRESENTS STORMWATER
r
-- - - - ' - " -
0.9":
MANAGEMENT ACCESS &
l,\j
,
MAINTENANCE EASEMENT
--
Tg�pF,gAM4 8.20
- t
10' WIDE AQUATIC SHELF
INSTALL
FACE OF FORANTINGS,
TOP SURFACE OF FOREBAY BER
(11 HARD -STEM BULRUSH & 11 PI
10' WIDE SPILLWAY NOTCH
ULLLJJ
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ui
390
S6S
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365
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P.I.N. 0850-03-04-4412 /PORTION
00
I f� ) \ P8 180. PG 306-326 '•
f I ff STORM MH
( 1 ( f SPLITTER BOX:
f RIM=364.30 1
1INV. IN=359.4'5 ( 1
l f INV. OUT=359.40 (36" BY ASS) I I \
t % f INV. OUT=358.80 (6" DIP 0 L.S.) ? \ \
1 ; PLUNGE POOL DI SIPATOR:
/ ( DISS ATOR LENPTH: 14' l I t
1 f t 1 H359 330 ; %` I DISPIPATOR WI H- 1 i
E AP ON LENTH�' 6/
6" DIP 1
;' % r B�SIN
/ INV =358 70 f / RIPRAP CLASS: CL. B, d50 p" `4
f 96°f L• RCP f / t RIPRAP THIbKNESS:8" r }
/ f i SEE PLUNGE POOL D 41L0N SHrT. 10.2 t:
3 �C'f' RCP / ff
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LEVEL IP
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ASL EAR WET D. f, J 'off C o
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l t f / �MeUFFFR r -
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THIS AREA'�HALL BE GRADED UNIFORMLY
f / /WITH 6" OF PLACED, NON -CLAY TOPSOIL,
AND PLANTED WITH NON -CLAYEY SOD.
i \
10' LONG COETE LEVEL SPREADER.
{ f / LEVEL LIP EL V.=359.20
f f / Q(W.Q.) 9178 CFS / r
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Date
NJA GAS
10/20/11
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02090500.0
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( 1 ( f SPLITTER BOX:
f RIM=364.30 1
1INV. IN=359.4'5 ( 1
l f INV. OUT=359.40 (36" BY ASS) I I \
t % f INV. OUT=358.80 (6" DIP 0 L.S.) ? \ \
1 ; PLUNGE POOL DI SIPATOR:
/ ( DISS ATOR LENPTH: 14' l I t
1 f t 1 H359 330 ; %` I DISPIPATOR WI H- 1 i
E AP ON LENTH�' 6/
6" DIP 1
;' % r B�SIN
/ INV =358 70 f / RIPRAP CLASS: CL. B, d50 p" `4
f 96°f L• RCP f / t RIPRAP THIbKNESS:8" r }
/ f i SEE PLUNGE POOL D 41L0N SHrT. 10.2 t:
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THIS AREA'�HALL BE GRADED UNIFORMLY
f / /WITH 6" OF PLACED, NON -CLAY TOPSOIL,
AND PLANTED WITH NON -CLAYEY SOD.
i \
10' LONG COETE LEVEL SPREADER.
{ f / LEVEL LIP EL V.=359.20
f f / Q(W.Q.) 9178 CFS / r
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10/20/11
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02090500.0
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10/20/11
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Job No.
8DH
02090500.0

J�SHADE ARE,
TS STORWATE `
:NT AC ESS &
ICE E EME / t }
X LONG X 10' WID_ULtND SW
TO BE PJ_ANTED`AS LINEAR 17VET
SEEDETAll.-ON fkS-PAGE. NC GRID (NaD83)
�. _ _ -� '`-•
11 O -LONG CONCRETE jEVEI--SPR w P8 180, PG 306-326
LEVEE LIP ELEV" 579.40
Q(W.P.)=0.95CFS l i
$.90 r SEE ?ETAIL ON SFT. 10.2 `
I ENGINEERED FILTER STRIP, 30' LONG.
I THIS AREA SHALL BE GRADED UNIFORMLY
WITH" OF PLACED, NON -CLAYEY TOPSOIL,
i LE EL LIP AND PLANTED WITH NON -CLAYEY SOD.
EL 79.40 I
" BY S)
i
END VFS
EL.379:1t
It
36 If ' `• I ,` �
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/! INV=379
If
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f QIt J I PLUNGE POOL DISSIPATOR:
DISSIPATOR LENGTH: /k0 1 f DISSIPATOR WIDTH: 14'
APRON LENTHI: 6
BASIN DEPTH: 1,3
RIPRAP CLASS: CL. B, d50=6"
RIPRAP THICKNESS: 18"
SEE PLUNGE POOL DETAIL ON SHT.10.2
�
ILLWAY
2Q
EL. 85.00 \ Ar
i } TOP OF FO EBAY @N.P. L =382.75 \
„ . LINE FORE Y EMBANKME TS / L
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„ 1 , 12" DEEP W/ ATARIC LINER
i1 DWIPATORk t ` , y�'L • a ... ` /
} 18'�X12'WXIB`D SPILL�AYCL. B RIPRAP, �50=6" EL.387
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P.I.N. 0850-03-04-4412 (PORTION)II
Dam Embankment Construction Standards
1. Controlled fill, as specified by the Geotechnical Engineer, in the dam embankment shall be placed in 6 -inch loose layers (3 -Inch loose layers within 3 -feet
of either side of the principal spillway pipe to a depth of 2 -feet over the pipe) and shall be compacted to a density of no less than 95% of the Standard Proctor
Maximum Density at a moisture content of + or - two percentage points of the optimum moisture content in accordance with ASTM D698.
2. All visible organic debris such as roots and limbs shall be removed from the fill material prior to compaction to the required density. Soils with organic
matter content exceeding 5% by weight shall not be used. Stones with size measurements greater than 3 -inches (in any direction) shall be removed from the fill
prior to compaction:
3. Fill material placed at densities lower than specified minimum densities or at moisture contents outside the specified ranges or otherwise not conforming
to the specified requirements shall be removed and reworked or removed and replaced with acceptable materials.
4. Any fill layer that is smooth drum rolled to reduce moisture penetration during a stone event shall be properly scarified prior to the placement of the next
soil lift.
5. Surface water and stream flows shall be controlled continuously throughout construction and the placement of controlled fill.
6. Foundation areas may require undercutting of compressible and/or unsuitable soils in addition to that indicated on the plans. All such undercutting shall
be performed at the discretion of the Geotechnical Engineer and shall be monitored and documented by the geotechnical engineer during construction. In no
rase shall there be an attempt to stabilize any portions of the foundation soils with crushed stone.
7. Treatment of seepage areas, subgrade preparation, foundation dewatering, and rock foundation preparation (Le., treatment with slush grouting, dental
concrete, etc.) may be required at the discretion of the geotechnical engineer. All such activities shall be closely monitored and documented by the Geotechnical
Engineer during construction.
8. Fill placed adjacent to the riser and principal spillway pipe shall be placed in a manner where lifts are at the same level on both sides of the structures.
9. Earthwork compaction within Vest of any structures shall be accomplished by means of hand tampers, manually directed power tampers or plate
compactors, or miniature self-propelled rollers.
10. Compaction by means of drop weights from a crane or hoist shall not be permitted.
11. Heavy equipment shall not be allowed to pass over cast -in-place structures (including the cradle) unfit adequate curing time has elapsed.
12. To reestablish vegetation after construction, a 2- to 3 -inch layer of topsoil shall be placed on the disturbed embankment surface and the area seeded and
mulched or hydroseeded. If grass stabilization is attempted during the summer months, the placement of sod and the implementation of an aggressive watering
program may be the best and quickest means of achieving the 85% stabilization requirement of the BCE certification program.
Testing, Observation, and Certification
13. Tests of the degree (%) of compaction of the placed fill in the dam shall be performed as a part of the Pernittee's normal quality control program for the
construction of the dam. Tests shall be conducted concurrent with the installation of the compacted fill, and the contractor shall coordinate the construction of the
dam so that the testing can be completed. Should the results of the tests indicate that the specified degree of compaction has not been obtained, the portions of
the dam represented by such tests shall be reworked or rebuilt. All portions of the dam shall achieve the specified minimum degree of compaction.
14. Construction of Class A, B, and C dam embankments (with the exception of detention only Class C dams that collect drainage from an area of 25 -acres
or less) shall be performed under the observation of a qualified Geotechnical Engineer, who is a registered NCPE The geotechnical engineer must have
experience in the design and construction monitoring of dams of the size and scope covered by these standards and guidelines.
15. On Class A, B, and C dams (with the exception of detention only Class C dams that collect drainage from an area of 25 -acres or less), the Geotechnical
Engineer, as defined above, shall observe all aspects of the construction of the dam (i.e., preparation of the foundation, installation of the cut-off trench,
installation of the principal spillway pipe, installation of the internal drainage, installation of compacted fill, etc.). The frequency of observation and testing must be
suffident for the geotechnical engineer (or the design engineer on Class D dams and Class C, detention only, dams) to state, in his/her professional opinion, that
the specific items observed and tested were installed in accordance with the approved construction drawings and specifications. For additional guidance on the
geotechnical certificabon of dam embankments constructed in the City, please refer to the City BCE Program in Section 8.6 of the Reference Guide for
Development (RGD).
General Notes:
1. Construction of the dam and all integral components of this facility shall be done under the supervision of a qualified Geotechnical engineer.
2. BMP As -Built certificafions shall be submitted to the City of Durham upon completion of this facility in accordance with the City of Durham BCE Program.
3. To reestablish vegetation after construction, a 2- to 34nch layer of topsoil shall be placed on the disturbed embankment surface and the area seeded and
mulched or hydroseeded, If grass stabilization is attempted during the summer months, the placement of sod and the implementation of an aggressive
watering program may be the best and quickest means of achieving the 85% stabilization requirement of the BCE certification program
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Drawn By
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-
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Checked By
Job No.
EIDH
02090500.0
LDURHAM DURHAM COUNTY NORTH CAROLINA
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380
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Drawn By
Date
NJA GAS
10/20/11
Checked By
Job No.
EIDH
02090500.0
LDURHAM DURHAM COUNTY NORTH CAROLINA
Sheet No,
rL"3MP
1 1-r% 1 0 % WITHOERS & R"ENEL DETAIL 1 OF 2 ENGINEERS I PLANNERS I SURVEYORS 8.7
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832

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NJA GAS
10/20/11
Checked By
Job No.
BDH
02090500.0
DOWNSTREAM
FACE OF DAM
ASTM C-33
OR NCDOT
3 2S SAND
4"0 SLOTTED PVC
SEEPAGE DIAPHRAGM DRAIN
4"0 SOLID PVC SEEPAGE (0.010 INCH SLOT WIDTH)
DIAPHRAGM DRAIN PIPE. 4" PVC CAP
DAYLIGHT THRU 24" CASTIN—PLACE
HEADWALL. - CONCRETE PIPE
24" RCP PIPE CRADLE
— — — — — — —
JCN
3'y
SEEPAGE DIAPHRAGM & DRAIN DETAIL
SCALE: N.T.S.
4"0 SLOTTED PVC 4" 8" 811 4"
SEEPAGE DIAPHRAGM DRAIN 36" RCP
(0.010 INCH SLOT WIDTH) "
4.
_ 1
4 v
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36" o ° c ' d 36"
#57 WASHED STONE o. °
ENVELOPE C a° °
°
6611
4,000 PSI CONCRETE
CONCRETE CRADLE 8c DIAPHRAGM DRAIN DETAIL
SCALE: N.T.S.
ASHTON HALL - PHASES 3 & 4
DURHAM DURHAM COUNTY NORTH CAROLINA
P.I.N. 0850-03-04-4412 (PORTION)
TYPICAL PER 50LF
381.42
U 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Q 40 FRAGRANT WATER LILY
o QO-Q 0 0 0 a o a 0�0 0 0 0 0 - O
j� + + + O O 0 0 O O 0 O + + + + + + + + + + +
CY + + + + 0 0 0 0 0 0 + + + + + + + + + + 40 PICKEREL WEED
+ + + + + + + + + + + + + +y
0 30 HARD STEM BULRUSH
1�4:zz_ _ ..../. 382.42
- - - ... - ---, _.--------------- _ ._..._ _ _.__ .-..--._ __._ ............................. NORMAL POOL 382.75
PLANT LIST
DEEP WATER EMERGENT COMMUNITY (1'-3' DEPTH)
BOTANICAL NAME COMMON NAME SIZE HT.
PONTEDERIA CORDATA PICKEREL WEED QUART 2' O.C.
NYMPHAEA ODORATA FRAGRANT WATER LILY BARE ROOT 3' O.C.
SCIRPUS ACUTUS HARD STEM BULRUSH QUART 2' O.C.
AQUATIC SHELF PLANTING DETAIL
N.T.S.
a
0
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10' LONG CONCRETE LEVEL SPREADER.
20 3 LEVEL LIP ELEV.=347.50.
DISSIPATOR APRON TO BLIND SWALE SEE DETAIL ON SHT.15.1.
7' L X 4'W X 9" DEEP, WITH CL. A RIPRAP,
d50=3' W/ FABRIC LINER. O
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10'X10' BLIND SWALE TO BE PLANTED
WITH WETLAND VEGETATION PER 3' 4' 3'
CITY & SPECIES SHOWN.
PLAN VIEW OF BLIND SWALE
NOT TO SCALE
6 DIP INFLOW PIPE 7
TO BLIND SWALE OUTFLOW ACROSS.
LEVEL LIP
10'
10' LONG CONC. LEVEL SPREADER.
LEVEL LIP ELEV.=347.50.
SEE DETAIL ON SHT.15.1.
SECTION THROUGH BLIND SWALE
NOT TO SCALE
DETAIL OF BLIND SWALE AT LEVEL SPREADER
2' 30' 2,
7 ,—
6" THICK, 3000 PSI CONCRETE
TOP
S TO
SURFACE
OF .CI ONCRETE SHALL HAVE A
r"r--=7TT=—T ROUGH
WN-SMOOTH
OSURFACE,
DSGOUGESKATEBARDINGON SPI80 LLWAY. .
+.................
�..
.II I—I 11-1 I i=i 11 III=Ill=1 I I III I I 1=111=111=111=1 �'-
--111.,-1 1.-1 I I...I 11-1 I L._....I I L._ ! I I
COMPACTED DAM EMBANKMENT
CROSS-SECTION
SEE PLAN SEE PLAN SEE PLAN
' FOR DIM. FOR DIM. � FOR DIM. rl
SPILLWAY
ELEV.
I
NORMAL POOL
8.3 LFx2"x2"x1/4" A
TOP OF RISER
#4 REBAR
(TYP.)
THIS SECTION OF TRASH
BE HINGED TO ALLOV
(OPENING TO BE CENTEF
TH
PAD LOCK
#4 REBAR WELDED
(TYP.) (SEE NOTES
PLAN VIEW
NOTES:
1. ALL REBAR TO BE #4 REBAR.
2. ALL REBAR AND ANGLES TO BE GALVANIZED WITH A BITUMINOUS COATING.
3. THE HOT -DIPPED, GALVANIZED 2"x2"x1/4" ANGLES SHALL BE WELDED TO THE REBAR TRASH
RACK. ONCE WELDED, THE ENTIRE ASSEMBLY SHALL BE PLACED ONTO THE MANHOLE RISER
WITH ANGLES SITTING DIRECTLY ON TOP OF THE RISER.
4. GAPS TO BE NO SMALLER THAN 6"X6' OR LARGER THAN 12"x12"
BOLT
#4 REBAR TRASH RACK (ABOVE)
ANCHOR TRASH RACK TO MANHOLE WALL WITH FOUR EQUALLY SPACED
HOT -DIPPED GALVANIZED STEEL CLAMPS. EACH CLAMP ATTACHED TO MANHOLE
RISER BY 2-3'x1/4" CONCRETE ANCHOR BOLTS EACH CLAMP TO BE COATED
W/ A BITUMINOUS COATING.
TRASH RACK DETAIL
N.T.S.
384.25 11 1 11 1111
TOP OF RISER
6" (TYP.)
NWSE = 382.75 -- --
6'
4" DIP 90' ELBLOW BOX RISER
INVERTED DRAWDOWN (PRE -CAST SECTIONS)
W/2" ORIFICE PLATE
8" DIA. PLUG VALVE
36" 0 -RING RCP
8" DIP INV.
ELEV. = 380.50
BARREL INV. IN = 379.50
8" DIP a 4 4 a r
a
8'
8'X8' CONCRETE
ANTI—FLOTATION BLOCK
WET POND #11 RISER STRUCTURE DETAIL
N.T.S.
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BMP 11 -WET POND D 2 OF 2
ENGINEERS I PLANNERS I SURVEYORS 8,8
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832

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FRAME,_ GRATE AND HOOD - O " O m CA
SEESTD.NO. 840.03 JJ USE CLASS "B" CONCRETE THROUGHOUT. t"1 H.-�j S EXPANSION JOINTS }
// PRDVIDE ALL CATCH RASIWH OVER 3'-6" IN DEPTH WITH STEPS 12' �Q G , Q Q
ON CENTER. USE STEPS WHICH COMPLY WITH STD. DRAWING 840.66. Q Q Cn Z Q 'S
� ��Oo 6„ I. E� 4_6r
TOP ELEVATION OPTIONAL CONSTRUCTION - MONOLITHIC POUR, 2" KEYWAY, OR #4 BAR DOWELS AT M C) DN 37 ,
,, cn
Y o / 12" CENTERS AS DIRECTED BY THE ENGINEER. LL _i a H Z - m z _ -I #4 BARS "V" j 6 8' \ ST0. 840.03 FRAME, U- _J d = z
_ USE FORMS FOR .THE CONSTRUCTION OF THE BOTTOM SU%B.. 0 = � = - N _q D @ EQUAL SPACES L „ Z
GRATE 8 HOOD CC
IF REINFORCED CONCRETE PIPE IS SET IN BOTTOM SLAB OF BOX, ADD TO SLAB { W Q Z LL- O O C7 -( 1.L� - 1Y¢" d -
w. AS SHOWN ON STD. NO. 840.00. F -.CS. .O y _ -n D m 3" i y i r F- V ItC �
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1 r 03 F_ o
n . R FOR B' -D" IN HEIGHT OR LESS USE 6" WALLS AND BOTTOM SLAB. OVER ~ LL. O J (i70, --r �I�,IJ.1 u- H J
0. 8'-0" TO 16'-0" IN HEIGHT USE B". WALLS .AND BOTTOM SLAB.. ADJUST 0 O H - C3 �D R - 113 R _ w OO
v QUANTITIES ACCORDINGLY. D v =,6 6'
i° ° CONSTRUCT WITH PIPE CROWNS MATCHING. - H -�G 1Cm
a PLAN HT' --SEE NOTE CHAMFER ALL E%POSED CDRNERS 1". C] ~ m G) 3" � , WO ¢ m ¢LL -0URB AND GUTTER WITH CATCN BASIN ON STEEP GRADES r wO
-T....T TA cemc - 1� C] Z °�-<e a , I --- o
m _ oY M i - m - - -- ----- ELEVATION t[
,� ' 'D ❑ fO. C ` A O z NORMAL CURB AND GUTTER ON LIGHT GRADES LL (z,�
E� ©H 0tii
.a (� _ m ..v' •:', ".'r 'r'. r' "' f E-� ry'. o. N m W .a rri = NORMAL GUTTER LINE Z m W
' 6..
N .; ° x o ' CL N - EXPANSION JOINT--- CL
m 6 o C 6„ 6„ e' x Q N m O 6' - Ef' #8 'W' BARS 'd #4 BAR 8" TOP Q... a
SECTION Y -Y a'. a I
D- D rti ° o'•. Q = D #4 A 5 "V" i iv USE ON GRADES OVER 2% ELEV. O -_
� m Z _ D d' ]7 , m Q @ E UAL PACES
".
C :: A VRISERARIES " <r `o m Q Lo C D m - -10 DE DRESSED GUTTER LINE [C -'Q LO
Cn a _ z - c. �L ` a EXP OIN I M,qX - Q :.i
A o _ - s". o z v U'a�-1 1, 0„ I. vl z W
6
' EXPANSION J T
p 6„ Cr
SECTION J -J s Y '. r Q UJ = C7 p 1 n
#4 BARS
`.q WHERE 30" TO 36" PIPE IS USED ~ ~ _ DOWEL ELEVATION (" Ilt ;`
H
SEE NOTE- a SECTIONh M -M to W r I SECTION R -R NORMAL CURB AND GUTTER ON STEEP GRADES _ Ilt =Cq
,a W. H.{ WHERE 42" TO 54". PIPE IS USED _ 1. N W N -
m T+ SZ WHERE 30" TO 36" PIPE IS USED ch z r m N z — -- -------'-------------- ----- ----- - ----- . - - --- - (I1' V ,-
cii RISEfl HT. H C) MINIMUM DINENSIOHS AND QUANTITIES FOR CONCRETE CATCH BASIN(BASED ON MIN. HEIGHT, H, WITH NO RISER) * 1•7 Z
M VARIES
37 al e
6.r. °... A o.�l
a
a�
WHERE 42" T0 54" PIPE IS USED
L
Q H
J z C7 Z O
M n D e W
...) A
LL n'I m
,I
DIMENSIONS OF BOX AND .PIPE
PIPE i SPAN WIDTH WIDTH ', SPAN
D ! A D C G
MIN. HEIGHT
N
I COVER
`DIMENSION
E F !
BARS -U
N0. LENGTH;
BARS -V i-
N0. .LENGTH
BARS -W '',.TOTAL
N0. LENGTH, LBS.
CU-YOS. CONC. IN BOX
TOP GOTI'ON'TOT• CONC.
SLAB. SLAB fOft YINDIUY
.HE VIN H
DEDUCTIONS
ONE PIPE
C.N. R.C.
12" 3'-0"
2'-2"
__ - _
2'.g"
PLAN vlEw NTS
BE FREE TO MOVE UP AND DOWN.
--
�
--
-- --
-- 0.235 0.7720.015.
0.026
15" 3'-0"
2'-2"
#4 REINFORCING
�!
M
0.235 0.829
0.023
0.036
1B" 3' 0"
-
24" ! 3'-0"
2'-2"
2'-2"
BARS 5 3/4" O.C.
3'-3"
-
W-9"
I
_ ..- ; - -
-- -
i
o
-- -
-----
----T--
-_-__- 0 235 '._0.887-
- _
0.235. 1.001
0.033
—
0.059
0.04_9--
0.085
30" 3'-0"
„ f
36 � 3' 0"
2'-2"
2' 2"
3'-4"_ _____4'_3"
3'-10"
4 •9".
7'-2" 4'-0".-.._4__
t.
" i " i
1'-B 4'-0 4
7'-.5"
7 11" I
2
3
3'-9"
_ _ I
� 3'-9
3
__
& `
3'-9" 39
_ + _.
3 9" 43
0.123 0 327. 11.433._
___ __
A 181 D 358 1 .714
0.092
0.1 2
3
0.127
0.176
42" T -O"
2'-2"
4'-5"
5 -3'
-T7.5" 3'-2"
4 1 8'
2
2'-11
3
2 -11"� 32
0.112 0 318 1.738
0.180
0.243
48" 3'•0"
2'-2"
5'•0"
5'-9"
2'-0" 3'-2"
4 2 W'
3
2'-ii"I
3
2'-111" 35
0.145 0.352 1 2.052
0.235
0.317
54" 13'-0"
2'-2"
i 5'-7"
6'•3"
12'-7" ,3'-2" I
4 ; 2'-10"
5
! 2'-11"I
3
2'-11"i at
0.180 0.386'' 2.387
0.297
O. a01
_1 Q
O V
Z
Lu
DETAIL SHOWING 'METHOD
SHEET 1 OF 2 OF RISER CONSTRUCTION PLAN „ PLAN SHEET 1 OF 2 SHEET 2 OF Z SHEET 2 GF 2
* RISER HAS .228 CUBIC YARDS OF CONCRETE PER FOOT HEIGHT
840.02 840.02 OW -02 840.02
OTT! -[i Oco O� 2 u 0�
H z 43 ---------_--- NOTE: USE TYPE " Er', "F" AND "G° GRATE = c ¢ Q Z DETAIL SHOWING TYPES OF GRATES 2'-11 „ d
Y H o w to N 0= USE ACCORDING TO WATER FLOW. z CI O cj
�o O p UNLESS OTHERWISE NOTED. 1 P +fid— P Z �- z •
F- o -T1 -) Co --L-- T� �I LL J a rO+ z m.O -r'1 'H B 0 "CIO
r-+.
Hz-i=� 8 000= ,_q --I > L- oocn=
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'1z� 218''' Ott' ��-pCOC¢ z= �r 9/e C3
z H= o o - N N N F I-. o Lu m -V -n � r i m �,o J
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�-I V A A ALIGN FRAME WITH INSIDE 1„ )-��----------------------------------- r
o EDGE OF WALL TO ALLOW a." rn p W O
z o FOR VERTICAL ADJUSTMENT 1n v� ^ p Z B 7 " n 0
D D WALL SECTION ---
C
1
SECTION - OB
- - - - - - - - - - - - - - - - ------ n u
B SECTION - PP SECTION - NN 1 �2
F SECTION B -B
- - - - -
4n i
-n PLAN - �a Z m ----------------------------- ----- 134 r 21 „ z
O m FRAME, GRATE, 8 HOOD ASSY J - :�' D H 11 rn - [t
ap z I" a� C5 O CO z WATER FLOW - SAG -f WATER FLOW �- O O Q
C O ---- —_1_ LL_ 00 cn r SECTION A -A D- _ m
m m cn e 2 0 }�s- ►z Q V m m= z U
- --
O `■ `m O V 'TYPE "F" —TYPE "E" I -TYPE 'rG'f TYPE - E `" G I -
Z 3'_0" - -: CIO�y,I Qom¢ z�� ¢Q�
�y r I Q v `� 9 RAISED FLOW ARROW rr a
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z -� D L M `� N Ni I- °i o N = z -� v RAISED FLOW ARROW 2�4 _- CO)
Q
�No SECTION AA --_ � � � aZ �Np %g" HIGH —��iW—Q
z
O -
DZ� L ryI "' a -i' C/3 (5 azo 11�" =� 1�2 ��z
aI FRAME_PLAN SECTION - JJ y LIJ O = Z `a ��err a O 1/8n H Lu W
CA 0 m r'I 1 rr x " -
31 5% 5`'�6" 1 O. W Q TI /1112
n Lu mc 0J
all
Ly
� m 'l 4 ` R 3" R W. U. CC CD
O = Q' 2rr 1 rr �8"' "R�. ..... ' 1118" w a
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z `T� 'v '' e,r 2'-0" err 1 11 Yz' 1Fa o Z 1 2'-113/4, ! 4 2'-113/4" i 1��11
T i$ 6 1/2" �i Q n r I - 11/2'r�8u 11/2't
312°„- 3r -Un 32nn u rr 12n "-I+— 1�2-►�� 1nLrt—.-
ION A. -- I
SECTION _KK rZ _11n in- 4r3� 13/„ _SECTION A -A 4� /en
SHEET 1 OF 2 - R SHEET I OF 2 SHEET 2 OF 2 TYPE - F �'CI
SECTION = RR TYPE G c*T SECTION A -A SHEET 2 QF z
840. 03 HOOD ELEVATION ]840.03 840.03 �! 1840.03
AREA AROUND HANDLE SHALL BE
Scale
AS NOTED
PLAN
SEE
COVER
MANHOLE RING
DETAIL SD -6.2
AND
COUNTER SUNK 1" AND HANDLE SHALL
SECTION A W/18" OVERLAP AT ALL SEAMS(TYP.)
UNDERLINER
L
02090500.0
PLAN vlEw NTS
BE FREE TO MOVE UP AND DOWN.
�
NTS
,
#4 REINFORCING
�!
M
APRON LENGTH
M
BARS 5 3/4" O.C.
A
i
o
RCP
. 0
CLASS B RIPRAP ,
N
I
�I
l
a
F B
0
o
- -
li TIT
t1=11 I — I r I �iT _ -111— —m-111_
I I 111-I n- -
1 Ila =111a . 1� .1� I I� _nl= nI_In=III-1�1=1�En =
_)
N
MIRAFI 140N
W
1
rr 1„ PIPE SLEEVE
GEOSYNTHETIC FABRIC MIRAFI 140N GEO-SYNTHETIC FABRIC
WITH 18 OVERLAP COMPACTED w/18" OVERLAP AT ALL SEAMS(TYP.)
AT ALL SEAMS(TYP.) SUBGRADE(TYP.)
0
0
3" LONG
Ln
PROFILE VIEW
46
#4 REINFORCING
G
N
-..-� BARS
PLUNGE POOL DETAIL
_
L�
Z
00000
3/4" RADIUS
H
3/4" SMOOTH
D
E
M—•-'
j�--
8"
STEEL BARS
-.
C
3,> X 1/4"
B
r
.... ROUND OR SQ.
CUT WASHER
HEX NUT
r'
LIFTING HANDLE
SIDE
K
PRECAST CONCRETE COVER
3'x y' 3 -0
4 -4„ V-1,, 9,.
_.
V
I I`
. "
5 3
4" I
!,/2'
7 1 ,
_
-CI'
u'-1 " 1 `-i i'
1.,
_/4"
4
1 .:
-
_
r" '
I I' l
41
1•'
5 7f f,.t„
1
1
6" OPENING
NUMBER OF SIDES WITH A 6" OPENING
WILL BE DETERMINED BY THE ENGINEER.
8" MIN.
SEE GENERAL NOTES DETAIL SD -1.0
l;llit TYP
REVISION DATE: w,'
12/07/2009
CITY OF E
1 a DEPART
CI _F C'E'=IaE
DDCf`ACT (K1hlf`DCTC 1 r%1/CD
CROSS SECT ION
0.00 SLOPE ON TOP OF
24" CURB- & GUTTER (3,000
GUTTER (FLAT SLOPE)
PSI MIN COMPRESSIVE SEE PLAN FOR LEVEL
STRENGTH) SPREADER LENGTH
PIPE OUTLET TO LEVEL LEVEL SPREADER LIP ELEVATION=
SPREADER 4"-6'1 HIGHER EXISTING SLOPE ON
DOWNSTREAM SIDE
DIFFUSED FLOW
2 RCP 2
THROUGH BUFFER
F
qkb �
RCP
BLIND SWALE
CONSTRUCTED AS
LINEAR WETLAND
#57 WASHED STONE —
COMPACTED (MIN)
COMPACTED 4" THICK MIN
0
Z
N
Z
O
o
E
0
0
o .f
t
L
N
Q
I
o Date B
No. Revision
0
0
0
0
I
0
0
i
Designer
W&R
Scale
AS NOTED
SUBGRADE(TYP.) MIRAFI 140N GEO-SYNTHETIC FABRIC
SUBGRADE PERMAMENT GEOTEXTILE
NJA GAS
10/20/11
Checked By
SECTION A W/18" OVERLAP AT ALL SEAMS(TYP.)
UNDERLINER
m
02090500.0
PLAN vlEw NTS
TYPICAL LEVEL SPREADER DETAIL
�
NTS
,
NTS
M
APRON LENGTH
M
A
o
RCP
. 0
CLASS B RIPRAP ,
N
2
a
0
o
- -
li TIT
t1=11 I — I r I �iT _ -111— —m-111_
I I 111-I n- -
1 Ila =111a . 1� .1� I I� _nl= nI_In=III-1�1=1�En =
N
MIRAFI 140N
a
o
GEOSYNTHETIC FABRIC MIRAFI 140N GEO-SYNTHETIC FABRIC
WITH 18 OVERLAP COMPACTED w/18" OVERLAP AT ALL SEAMS(TYP.)
AT ALL SEAMS(TYP.) SUBGRADE(TYP.)
0
0
Ln
PROFILE VIEW
46
NTS
N
PLUNGE POOL DETAIL
L�
Z
00000
0
Z
N
Z
O
o
E
0
0
o .f
t
L
N
Q
I
o Date B
No. Revision
0
0
0
0
I
0
0
i
Designer
W&R
Scale
AS NOTED
Drawn By
Date
NJA GAS
10/20/11
Checked By
lob No.
BDH
02090500.0
000°,�N CAR0000
p//°°a°o
C� O� °p .00'.
oa
op SS/
o Q SEAL 0
° ° o
oo
23484 0 0
° °
°
%
Q°0F GIN�F-,`�'°�
E Y 000 9
0
°00 OO
Sheet No.
ASHTONPHASES 3 & 4& R"'NEL
ST A A E TAILS
ENGINEERS I PLANNERS I SURVEYORS 1 e2
DURHAM DURHAM COUNTY NORTH. CAROLINA
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] www.withersravenel.com License No. C-0832