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366.14
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6.15
Z A, A. z 4% 1. TO MINIMIZE DAMAGE TO EXISTING TREES NEAR THE INTERIOR EDGE OF SUFFERS
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1 0 21 1 AND STREETSCAPES, THE CONTRACTOR SHALL CUT MINIMUM 2' TRENCHES ALONG 0
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VELOCITY
IPJ
3 4.60 3'W X 20'L X/22"THK Y� x
4.10
2. THE TREE PROTECTION FENCE SHLL BE MAINTAINED ON THE SITE UNTIL ALL SITE
TION PR
IOR TO THE CERTIFICATE
z' WORK IS COMPLETED AND THE FINAL SITE INSPEC
6 .
364.40 LASS B RIPRAP 4
Ell
I ---'\ OF OCCUPANCY (CO) IS SCHEDULED. THE FENCING SHALL BE REMOVED PRIOR TO
A A- FINAL SITE INSPEC11ON FOR THE CO.
Z
Ca
A
Cu 361.85/ S MWATER/ACCESS I jw 3. PERMANENT GROUND COVER WILL BE ESTABLISHED IN 15 WORKING DAYS OR 90
3 0 36 .3,5
CALENDAR DAYS, WHICHEVER IS SHORTER.
MAIN'rENANcE X
LO z
E SEMENT/
4. CUT/FILL SLOPES SHALL BE STABILIZED WITHIN 15 DAYS OF ANY PHASE OF
x
co
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BN
X ON CONFERENCE MAY BE REQUIRED PRIOR TO THE GRADING
Z -CONSTRUCT1 z
41
5. A PRE
PERMIT BEING ISSUED.
361.55
y
TIMES OR A
6. STREETS IN FRONT OF THIS PROJECT WILL BE KEPT CLEAN AT ALL
�k *J WASH STATION WILL BE REQUIRED.
62.50
36 .65 93 ��l 5- RCP SHAH BE 4" PERFORATED HDPE. ROOF DRAINS FOR THE
-x 111
S' 7. FOUNDATIONS DRAINS
ALL OTHER PROPOSED BUILDINGS
63 5 0 1.00% HOMES 1-46 SHALL SPLASH ON GRADE.
CD
C, SHALL CONNECT TO THE STORM DRAINAGE SYSTEM OR DAYLIGHT AS SHOWN ON
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THE GRADING PLANS.
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5_ 36 10 APPROVED
11(�x x PROJECT NO.
6 *50 SRF-05000
4- FWNAm: SRF0500OG1
TOWN OF CARY
j Mr
362.50 "W3,-�V,'
36ZOO 1. 0 -IWO
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Date
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AN Datim- DRAWN BY:
Planning REC/JRB
368:
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Engineering Date- SCAM:
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9'L X 12'W X 22" THk IL /1( GRADING KEY NOTES:
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2 36 50 _1 CLASS B D 09
x. _31 TION. SEE DETAIL SHEET D-5.
se
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ET NO.
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m EDGE OF EXISTING PAVEMENT. m
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` '� -1�-­v� - I ALL ROOF DRAINS/AREA DRAINS SHAH BE 6'PVC (SCH 40) 0
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DIP MEN COVER IS LESS THAN
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LL 12 INCHES. PROVIDE AH RELEASED FOR CONSTRUCTION
FINAL DRAWING
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// — 7
CATCH BASIN T�
DROP INLET
/ / / �/ �/ / /// / 1 !� ' ■ STORM SERVICE INLET Z
A sr P_AmaiyN E_ COL. I - e STORM SERVICE ROOF-DRAIN p--
NJ
T STORM MANHOLE
l -
;_/ ► DRAINAGE FLOW ARROW
L
LINE BREAK SYMBOL
250•50 TOP & BOTTOM CURB ELEVATIONS
250.00
TW=223.00 —TOP OF WALL ELEVATION
BW=213.00 —BOTTOM OF WALL ELEVATION
(NOTE: BOTTOM OF WALL IS GROUND
ELEVATION NOT WALL FOUNDATION)
+ 250.60 SPOT ELEVATION
LOT 601 STORM DRAINAGE
a'
STORM SERVICE LINE
f i
ALL CONSTRUCTION MUST BE PERFORMED IN —RD—RD—RD—
ROOF DRAIN, 8" ADS Oak
',. � NON-PERFORATED TUBING OR
ACCORDANCE WITH CURRENT TOWN OF CARY STANDARD = EQUAL COVER PVC
MIN. SLOPE 3' MIN.
�� � VC SCHEDULE 40 IN
SPECIFICATIONS AND DETAILS.
i }
TRAFFIC AREAS
Q —TP—TP—TP— TREE PROTECTION
N GENERAL NOTES: LD LD LIMITS OF DISTURBANCE
WOODED AREA
0 1. TO MINIMIZE DAMAGE TO EXISTING TREES NEAR THE INTERIOR EDGE OF BUFFERS
N AND STREETSCAPES, THE CONTRACTOR SHALL CUT MINIMUM 2' TRENCHES ALONG ? 250 10' CONTOUR
a THE LIMITS OF DISTRUBANCE, SO AS TO CUT, RATHER THAN TEAR, ROOTS.
252 2' CONTOUR
3 2. THE TREE PROTECTION FENCE SHILL BE MAINTAINED ON THE SITE UNTIL ALL SITE ;' -------259------- EXISTING 10' CONTOUR
WORK IS COMPLETED AND THE FINAL SITE INSPECTION PRIOR TO THE CERTIFICATE
52
OF OCCUPANCY (CO) IS SCHEDULED. THE FENCING SHALL BE REMOVED PRIOR TO }' ------2_-------- EXISTING 2' CONTOUR
o FINAL SITE INSPECTION FOR THE CO. 1 — — — -- — EASEMENT LINE
U- 3. PERMANENT GROUND COVER WILL BE ESTABLISHED IN 15 WORKING DAYS OR 90 }
9CALENDAR DAYS, WHICHEVER IS SHORTER.
E 4. CUT/FILL SLOPES SHALL BE STABILIZED WITHIN 15 DAYS OF ANY PHASE OF
GRADING.CD
j�JN
3. 5. A PRE—CONSTRUCTION CONFERENCE MAY BE REQUIRED PRIOR TO THE GRADING FEB 2 4 2009
0
PERMIT BEING ISSUED. _ OECdR-WATER Cu1AL3iy
rn
6. STREETS IN FRONT OF THIS PROJECT WILL BE KEPT CLEAN AT ALL TIMES OR A ° II AND STORlAWATR BPAfi,rWl t
o WASH STATION WILL BE REQUIRED.
7. FOUNDATIONS DRAINS SHALL BE 4" PERFORATED HDPE. ROOF DRAINS FOR THE Oq7p—pS P—`/O 5
HOMES 1-46 SHALL SPLASH ON GRADE. ALL OTHER PROPOSED BUILDINGS APPROVED
RO V ED
TSHALL HE GRAD NNE CPT PLANS.
STORM DRAINAGE SYSTEM OR DAYLIGHT AS SHOWN ON TOWN OF CARP PROJECT rro. SRF-05000
GRADING KEY NOTES: DESIGNED GNED BYSRARPOOJAa1
TOTAL AREA DISTURBED = 37.9 ACRES Approved by Date
8 1D PERMANENT OUTLET PROTECTION. SEE DETAIL SHEET D-5. Planning Date DRAWN BY: REC/JRB
�2 EDGE OF EXISTING PAVEMENT. Engineering Date SCALE: 1" = 30'
O3 ALL ROOF DRAINS/AREA DRAINS SHALL BE 6"PVC (SCH 40) ® DATE: 09-19-08
1.04% MIN. SLOPE UNLESS NOTED OTHERWISE. DRAINS SHALL BE GRAPHIC SCALE
CD DIP WHEN COVER IS LESS THAN 12 INCHES. PROVIDE ALL SHEET NO.
LL
LO
FITTINGS NECESSARY FOR INSTALLATION. 30 0 15 30 60 -13F
u�i 3
1 inch = 30 ft.
In FINAL DRAWING - RELEASED FOR CONSTRUCTION NMCADAMS
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US
OPC334 62N �`'' ® a 18"RC�PLANS,FOR STORM DRAINAIGEN�G +� �'' a 'NVV IN #8454/ /�4" P
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1 INV IN (1) 330.84 _ DESIGN-- LL _ µ "~ INV T 3 = A _
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INV IN (2) 330.74 -
r � -f -OUT 18. 4
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_
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TOP 342.15 0 0 0
INV IN 338.05 .. ® ---� __ .�= ,. � ; � .__, ���•- _,-__= _ =h' - `� __ r � / _ -
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® INV OUT 337.90INV=320.75 -
o
60 LF 15 RCP
® 1.00^ MM
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3 INV OUT 348.63 \\ � L`� P�J �, \' \ '. // C�- > v�
= _ -
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\\ ®Sri` J - " _ / / / / // // J // i / // 65 LF 2401.00%// RCP \ ` = GRADING LEGEND
Ar
> CAP STORM, STUB 3 \ :t 3
LIMIT OF CCRC // // // // / f // /' / // z ` % X 1-
CA FLARED END SECTION 250.60 SPOT ELEVATION
SITE ACCESS �' ''/ / DISTURBANCE / / / / / ! / / .r:=:rr t i
ST WATER ACCESS __ £
1y f=. STORM DRAINAGE
AN MAINTENAN I __1 =!j »I CATCH BASIN
- , �• / / / / / �f j v 'r' 1; -' STORM SERVICE LINE
EASEMENT ROOF DRAIN, 8" ADS
doom
'k/ %•, DROP INLET -RD-RD-RD-
`9 ® STORM SERVICE INLET NON-PERFORATED TUBING OR
EQUAL 1.0% MIN. SLOPE 3' MIN.
' '
r , / i f` ®; COVER PVC SCHEDULE 40 IN
1 ® / .' 1 ♦ s STORM SERVICE ROOF-DRAIN TRAFFIC AREAS
ro� / _-- J tijD / !_.'' 1 ""� / -27 LF 24" RCP
err - _ / / ! / f`Y r
} ® STORM MANHOLE
-TP-TP-TP- TREE PROTECTION
\ 1
69 LF 15 RCP \ / i -lD lD LIMITS OF DISTURBANCE
J / / fi -�� DRAINAGE FLOW ARROW
THIS STORY-Dt�AINAGE SHALL BE �' J /J /- // ( 0 0.50% // t;syF , /, ,_ _
e WOODED AREA
I / INSTALLED WITH THE CONSTRUCTION / "\ // �_
i OF/S1TE ACCESS #4, DURING THE _ __ 250
/LONSTRUCTION OF SEARSTONE NORTH_ __ _\ - _ / l / l FES-91 A ' LINE BREAK SYMBOL
� s n= \ __ / I // ' ✓ B- a \ fi / } k_ t x/ ♦ 250.50 252 10' CONTOUR
/ ,fB-91 B / vs
/ OR SEARSTONE RETAIL 6 f .�_'' /, / r. �fPF M 250.00 TOP & BOTTOM CURB ELEVATIONS 2' CONTOUR
-
/ � J //•-/ / I .' \ �_ _ .• _ �` f. 'i ,ri +! ------ ------- EXISTING 10' CONTOUR
-
_ / / / //.' ' TW=223.00 -TOP OF WALL ELEVATION
\I ) / / / / //-/ / I / fi =`,/ BW=213.00 -BOTTOM OF WALL ELEVATION --------------- EXISTING 2' CONTOUR
� 4 � , 252
(NOTE: BOTTOM OF WALL IS GROUND
v , EASEMENT LINE
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j! s �� \ .. /p� I ` ♦ / /j -� //I 0 PERMANENT OUTLET PROTECTION. SEE DETAIL SHEET D-5.
/ ! .. � INV.=338.00��z _�of--~� � � � `� \ / fi- = ��-r -_� �._ � � .�J /
EDGE OF EXISTING PAVEMENT. w
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24 LF 24 RCP \ \ - = '.- / �' /// / 1.04% MIN. SLOPE UNLESS NOTED OTHERWISE. DRAINS SHALL BE
'ST0RMW TFR ACCESS I J ♦ fi fi =f ,f, '- J¢ //�% i / DIP WHEN COVER IS LESS THAN 12 INCHES. PROVIDE ALL
fi t `f
J AND MAINTENANCE I s 4\ I {{ ;fib: . 5 - ! / I
�. �� f/=, o, ♦ r'/, /// / FITTINGS NECESSARY FOR INSTALLATION.
__` EASEMENT (BAC\ OF \ `_ f'' -; - - rr� /
- _ CURB TO BACK Off'\ � � \ 'It _­_1
-WRQ TYP.) \ 24"
\ " --� {7 - 25 LF RCP �`�:t� ��/.'
123 LT 24 RCP / ® O.So• ,fi s y .� h- =` _ ;> / // e / // ALL CONSTRUCTION MUST BE PERFORMED IN
! / / 00.509 _! rw, q ACCORDANCE WITH CURRENT TOWN OF CARY STANDARD
I CB-54A 68 LF 24,� RCP =f`
+ ! \ \ s t r t ' =fir/ ( SPECIFICATIONS AND DETAILS.
40 251LF 18 RCP 7 / s / ti !' =- _{ -// GENERAL NOTES:
0 1;.00%
_ '=:`i lj it+++( /l I 1. TO MINIMIZE DAMAGE TO EXISTING TREES NEAR THE INTERIOR EDGE OF BUFFERS
w / - + f / s .tfi. ,_ fir ti T t{,,: .. llj , !+ r► ,
LF RC {tD _,. :} 5= � +! `� Id ! / AND STREETSCAPES THE CONTRACTOR SHALL CUT MINIMUM 2 TRENCHES ALONG
7% ++ THE LIMITS OF DISTRUBANCE, SO AS TO CUT, RATHER THAN TEAR, ROOTS. 04
/ / C 56A `® I 9/ ®� „/ +
362 / h, ---_-, \\ \ ! / 'r ® �) I}-` s s= s _ +It / ♦ 2. THE TREE PROTECTION FENCE SHLL BE MAINTAINED ON THE SITE UNTIL ALL SITE
i I 1 _ .- / I / . ++ ' 'N ! WORK IS COMPLETED AND THE FINAL SITE INSPECTION PRIOR TO THE CERTIFICATE
1 _ _
\ 359 \ �' / ® _.\/ / - s ! , N ! / OF OCCUPANCY (CO) IS SCHEDULED. THE FENCING SHALL BE REMOVED PRIOR TO
P I + ! 1 I 1 0 +�CB_ 5 J ♦ TRANSITION BUFFER -0
/ \354
s s f ! 11 /ZONE 3 URBAN I FINAL SITE INSPECTION FOR THE CO.
cry / i 3. PERMANENT GROUND COVER WILL BE ESTABLISHED IN 15 WORKING DAYS OR 90
! I CB- / / 5 LF 1$ _` - ' `zf -` L' +++ / CALENDAR DAYS WHICHEVER IS SHORTER.
INN.=344 9 ' _ :fi=-_ _ _-,._ h_i ♦a- /!98 LF 24 RC y� + / �& I I / 0.50 fi #_�► ;} �a ! / J `TRANSITION BUFFER
! w / ZONE 2 URBAN
/ / / 0 1.63% / / ` ! ! / / ; .' / .j / :- _ f '4V , /! / `` 4. CUT/FILL SLOPES SHALL BE STABILIZED WITHIN 15 DAYS OF ANY PHASE OF
co / / °� f.L--•�--m / �\ / ! r 1 l:' I / % fsr fi fi 2p i : > >- • / !// j I GRADING.
r / f,"•,•�' 195 LF 15" R P -- '"` + 1 � / /` ,�% I ` _- �� _ :° ♦ - ,� '�- ra �. //�,/�//
! ® ( 5. A PRE-CONSTRUCTION CONFERENCE MAY BE REQUIRED PRIOR TO THE GRADING
cv ... ../ s �' \+ ! ! •76 LF 30" RCP / _% / f ( -9 I g l r `, pr �/` !i/ / / . F / /lo' 0 ZONE 1 URBAN PERMIT BEING ISSUED.
FES �► TRANSITION BUFFER
. .-. ./ - •- • / / 1 / 0 11.32% l-= 3 ; r` ' /ii / 6. STREETS IN FRONT OF THIS PROJECT WILL BE KEPT CLEAN AT ALL TIMES OR A
a � i.. . .. . . / � CB-57A ! + / / - �'F' _}I�"-. s�'.,_`� � � x} �- . r .r;-..,� / i
11 / 1 =I`-__ -:_` -{ = r" _ /i/ / WASH STATION WILL BE REQUIRED.
125 LF 24 RCP / ! / ! -♦ ' ♦ _ -" '/ // / /
�,/ �' T \ 1• % ! 53 LF 24 RCP / ! l o = _ r r //f! / I 7. FOUNDATIONS DRAINS SHALL BE a PERFORATED HDPE. ROOF DRAINS FOR THE
• • •• • V / 0 3.00% V J o f =w }_ ;F'-:= a /// / I 100 YEAR HOMES 1-46 SHALL SPLASH ON GRADE. ALL OTHER PROPOSED BUILDINGS
� F
I \ I + ! l "/ t 4 `{ ♦ t ° ¢_ f f FLOODPLAIN SHALL CONNECT TO THE STORM DRAINAGE SYSTEM OR DAYLIGHT AS SHOWN ON
THE GRADING PLANS.
/+ + 53 LF+24" RCP / CB-B4 ! ��� {�`_ }, - s `: �_ ,=I �,/ i
+ 3.oq% . _ / / Qo� s r= f t®/� / I TOTAL AREA DISTURBED = 37.9 ACRES
/ r 'J Ill ' J/ i �.
. . . .. .� �/ / / .` j + ! _ � _- moo � = i:- ♦ _ jr� -- ! I
r J +
® ._
LO �vQ _ / e i r{ i ` ♦J/! Y I, !I /
' ` , /+ ` � -�' �� VELOCITY DISSIPATURS
3 / / ,_ -----�•.: / � '•.�- •` / / � I / � '°:�'= I SANG S7'0�?�yyA
1.00%
/ 25 LF , " RCP �� ` I -- =� _ _ ;� - 0 7- S P- 0 3 5 TERBRANM
/ / - / 10 I / / / / / // , `
J I ool
FES IDJ MATERIAL � LxWxDelth APPROVED
\ _ , } i t`�, / ( / 1 / FES-8 CLASS B s S x5 x22 SRF-05000
& w a r w PROSECT N0.
CB-58 / I ® 3 ! / / / / FES-9 CLASS B 6" 12'x7'x22" TOWN OF CARY FILENA7I�E: sRFo50o0G1
I♦ FES-10 CLASS B 6„ 15�x9�x22„
} FES-11 CLASS B 6 12 x7 x22 DESIGNED BY:
_ -�- Approved b Date ARP JAA
\\ / x:'` . ,'" t 1 I // J // / / / O \ � _ / �/ FES-91B CLASS A 3" 1O'x7'x9"
/ Planning Date DRAWN BY: REC/JRB
I + / ' ! / / ` ♦ ♦'� / t Engineering Date
76 LF 24"R
103` 18(' RCP / / s __- / _ ' t ♦ =f // SHEET N0. 09-19-0$
�.FF I 1 GRAPHIC SCALE
Ln
Of rz. C'ae O
u P:. I y IT
s
11 + �
40 0 20 40 80
I x 1 inch = 40 ft.
/ / / _ -�a -- _ =-1! it ! ' y
f s
M Ay g■p Epp(/�♦g�
19.L C l SL/L i. S
._ v.yr- .E. f, r_:._ __ ,r \ y a_ _._ v v, i _ / i / fi' ' / / ® / •. 3: F �. .F! ®;, FINAL DRAWING - RELEASED FOR CONSTRUCTION
2
cz`.

I- 1\ \\ \\ I I it \ \ I l / ,l 1 ,/ I s I \\ �' // / I I
1 \ \ I \ I CONTRACTOR TO FIELD LOCATE EXISTING I ?� `/ / I 0
-1 \ I I I I I I OUTLET PIPE AND FILL PRIOR TO ANY 1 19° / - 1
\ \\ } I I I I 1 PROPOSED GRADING L0 t // , // e\ I / �q
0-1
STORMWATER
���/�r�s� P1 TT�+y�q �r �/��q TT Tt } I I I I I \ I � /I -- �4
,iV�►i�L1, ER POND CON V\✓ ON SPECInCAMONS �,®N�V N F 1 A N ie\11\ '46 e, ', I I 1 1 I 1 � \ I I n I 1_� I I // // �� � l
� Q 00 w I I I \ \ \ I I I f / \ T l
1. PRIOR TO PLACEMENT OF THE NEW FILL, THE AREAS ON WHICH FILL IS \\ \ \ 1 m ° w / \ } I V_ I l -FI / i/ / l
GENERAL NOTES TO BE PLACED SHALL BE CLEARED AND STRIPPED OF TOPSOIL TREES, \ \ 1 I I I i N - _ \ \ \ } n I ` I 1 / I /
ROOTS, VEGETATION, AND OTHER OBJECTIONABLE MATERIAL THE AREAS ON \ \ I I I I i I / `= \ 'I \ W , I o / I
1. ANY CONFLICTS ON THE PLANS, DRAWINGS, REPORTS, ETC. SHALL BE BROUGHT TO \
THE DESIGN ENGINEER'S ATTENTION PRIOR TO CONSTRUCTION. WHICH FILL IS TO BE PLACED SHALL BE SCARIFIED. \ I I I ( I I -, 1
\ I I I I \ \ it / i N LO
\ I I I I I i I I ` � � \ \ 1 /' O o
2. PRIOR TO CONSTRUCTION, THE ON-SITE GEOTECHNICAL ENGINEER SHALL VERIFY THE 2. ANY REMOVED TOPSOIL SHALL BE STOCKPILED FOR USE IN PLANTING \\ 1 I I I / 1 I / / ! i . y�q
(SEEDING) ON THE DAM EMBANKMENT ONCE FINAL GRADES (AS SHOWN ON / I / / __ \ \ // \ 10-4 �" v
SUITABILITY OF THE PROPOSED BORROW AREA / FILL FOR USE IN THE DAM EMBANKMENT } I I I / i I / / r' _-_ \ \ \ \ _ / \ W z I
THE GRADING PLAN) HAVE BEEN ESTABLISHED WITH COMPACTED FILL. / I / /
/ KEY TRENCH. I I i I I I l 1 ! l l l I 3_ \ \ \ \ 1 I O
3. THE CONTRACTOR SHALL FURNISH INS.AJ. OPERATE AND MAINTAIN ANY 1 i i I l l I I l ` ,,\
( x r.,
3. THE ON-SITE GEOTECHNICAL ENGINEER SHALL INSPECT THE KEY TRENCH EXCAVATION PUMPING EQUIPMENT, ETC. NEEDED FOR REMOVAL OF WATER FROM VARIOUS / I i I I/ / / // / / // / ` `�� \ \ - ' - 1 I 1 = \ � .-
PRIOR TO PLACEMENT OF ANY BACKFILL WITHIN THE KEY TRENCH. IF THE CONTRACTOR PARTS OF THE STORMWATER POND SITE. IT IS ANTICIPATED THAT PUMPING / I I I I / / / / \ \ \ \ I I 0 � a'
CONSTRUCTS AND COVERS UP THE KEY TRENCH PRIOR TO INSPECTION, THEN THE KEY // i I I I I / / / / / / - ` \ ,-` I / i ® = a
WILL BE NECESSARY IN THE EXCAVATION AREAS (I.E. - KEY TRENCH). i i / / / / �,, \ \ � \ o � � �,�,q a N TRENCH SHALL BE UNCOVERED AND TESTED AT THE CONTRACTOR'S EXPENSE. / /_/ ` \ � �-' - � I / II Wz
DURING PLACEMENT OF FILL WITHIN THE KEY TRENCH (OR OTHER AREAS AS / / / / , \ \ \ \ \ --- / I / /
NECESSARY THE CONTRACTOR SHALL KEEP THE WATER LEVEL BELOW THE / ` \ \ \
4. THE CONTRACTOR SHALL REFER TO THE SEEDING SCHEDULES BELOW. PLEASE NOTE )• EXISTING DAM EMBANKMENT - \ \ \ - \ I / z zLO o
BOTTOM OF THE EXCAVATION. THE MANNER IN WHICH THE WATER IS / '\i \ \ \ \ /
THAT NO TREES / SHRUBS OF ANY TYPE MAY BE PLANTED ON THE PROPOSED DAM //' TO BE RAISED TO ELEVATION "I v� W �-, o 0
REMOVED SHALL BE SUCH THAT THE EXCAVATION BOTTOM AND SIDESLOPES / / \ \ \ \ I / a W-4 o 0
EMBANKMENT (FILL AREAS). ARE STABLE. / / / i I / / / _' 372.00. GEOTECHNICAL '�r� \ \ \ \ ---- _ \ I 1 1 / \ F, -0 LO
I 1 , / / ENGINEER TO EVALUATE �-__ \ \ �� �`- - \ \ \ I I / / � •-+ I
5. IF THE POND WILL BE USED AS SEDIMENT BASIN DURING CONSTRUCTION, THE AREA -- // I l / , / /; SUITABILITY OF EXISTING =_ 1 \ \ \ �, r / / �! = = � 4
DA1V�i SOIL COMPACTION USiPECInCA�IONS I / / / / -=- EMBANKMENT BEFORE FILL
SHALL BE CLEANED OUT (I.E. SEDIMENT, TRASH, ETC) AND REVEGETATED (IF NECESSARY) / / -_ --- - � W U � o
' / I / / / / / MATERIAL IS ADDED TO THE ---- \ / / / � W LY O CO
PRIOR TO USE AS A STORMWATER MANAGEMENT FACILITY. THE TRASH AND SEDIMENT 1. DAM SOIL AND COMPACTION SPECIF!�ATIONS ARE BASED ON THE / }` / P�
/ / / / / / / / EXISTING DAM EMBANKMENT. '1 \ \ \ � W ^
SHOULD BE DISPOSED OF PROPERLY (I.E. - LANDFILL). RECOMMENDATIONS DETAILED IN THE REPORT OF GEOTECHNICAL EXPLORATION / / / , / / / / / \ I I / 0 cc . O
PREPARED BY MACTEC ENGINEERING AND CONSULTING INC. DATED JUNE 7, // / // / / , / / / / _-` -- / Z W O --I
6. PRIOR TO ORDERING OR INSTALLATION, CONTRACTOR SHALL PROVIDE THE ENGINEER 2007. / / / /r= . :� ; .. w ,
WITH RETAINING WALL SHOP DRAWINGS FOR REVIEW. THE SHOP DRAWINGS SHALL BE / / / / / / , /r= ,:.- :' :.a::,: ::::::,_ ;,"1....;...., q / /
SEALED BY A PROFESSIONAL ENGINEER REGISTERED IN NORTH CA OUNA 2. ALL FILL MATERIALS TO BE USED FOR THE DAM EMBANKMENT SHALL 8E / / / / / /: _ \::: \ / / / 11
TAKEN FROM BORROW AREAS APPROVED BY THE ON-SITE GEOTECHNICAL ' / / / / / / / ._ \: I / l i / °°®aueeuree
7. ALL WALLS AND RISER STRUCTURES SHALL. BE DESIGNED BY A PROFESSIONAL / / / / / / / ! >�'°.` :: :: ' I / / / / / °e°°° CA ®'®ENGINEER. THE FILL MATERIAL SHALL BE FREE FROM ROOTS, STUMPS, WOOD, s / / ❑ / ° ,
STRUCTURAL ENGINEER REGISTERED IN NORTH CAROLINA. ALL STRUCTURAL DESIGN " / / / POND 1 UPPER \ / / / / / / ee '(N °°,• o,
STONES GREATER THAN 6 , AND FROZEN OR OTHER OBJECTIONABLE / / / _'f / / / e
DRAWINGS SHALL BE SUBMITTED TO AND REVIEWED BY THE DESIGN ENGINEER PRIOR TO / / / / / NORMAL POOL ELEVATION = 370.00 � \ I / / / / •°° r
MATERIAL. THE FOLLOWING SOIL TYPES ARE SUITABLE FOR USE AS FILL i / / \ .` l / / .•pF ;y
CONSTRUCTION. WITHIN THE DAM EMBANKMENT AND KEY TRENCH: ML AND CL .; // / / / / / ;' _-"e \ "` I I / / "
°a w
8. NC DAM SAFETY WILL CLASSIFY THE PROPOSED DAM AS A HIGH HAZARD » 1.
/ / / / / '' C-1 ' 1 "' / / / .
3. FILL PLACEMENT SHALL NOT EXCEED A MAXIMUM 8 LIFT. EACH LIFT "I / / / 1` / / `` / / 299 7
JURISDICTIONAL FACILITY. ALL NC DAM SAFETY PERMITS SHALL BE OBTAINED BY THE SHALL BE CONTINUOUS FOR THE ENTIFc" LENGTH OF EMBANKMENT. BEFORE i' i / / - - / / \ } ` ` 1 / / /
OWNER PRIOR TO BEGINNING CONSTRUCTION. / \ ..::::. :::.... 1:: . / /
PLACEMENT OF FILL FOR THE BERM SECTION, ALL UNSUITABLE MATERIAL / / / / .= / / . . .... .\ I I 1 / / / / / '#,�9 °° °•GI NE�°•°° se.
SHALL BE REMOVED AND THE SURFACE PROPERLY PREPARED FOR FILL i / / / / '` / / 4z y t:: : I I I / / / / / '• •••°••••° eee
9. ALL NECESSARY PERMITS WILL BE OBTAINED FROM THE US ARMY CORPS OF / / / , WEIR OUTLET STRUCTURE TO LOWER POND �r� / / � \` ` _ - /
ENGINEERS, NC DIVISION OF WATER QUALITY, AND THE TOWN OF CARY PRIOR TO11
PLACEMENT. �" ":._..:." / / / SHAPE = SEMICIRCULAR / / .:.:. . 1 I 40 / a/ /
/ / Q' - INSIDE RADIUS = 78 FT. / \:: :: ' I / / / /
DISTURBANCE OF ANY JURISDICTIONAL WETLAND/STREAM. 4. ALL FILL SOILS USED IN THE EMBANKMENT KEY TRENCH CONSTR CTI N / / "" '� / / :: : ::t':: '
/ U 0 / 3 WEIR CREST = 370.00 / :.: :'\. .:: \ � :::...._..... i i / / / � /
SHALL BE COMPACTED TO AT LEAST 9590 OF THE STANDARD PROCTOR / / / °' / / / I / / /
/ _ :: ::: :::::t: .::.:: :t . I /
10. THE RISER AND BARREL STRUCTURES MUST BE ON SITE BEFORE A GRADING PERMIT / , / / WEIR LENGTH 46.67 = / / / i I / / l
MAXIMUM DRY DENSITY (ASTM-698). THE FILL SOILS SHALL BE COMPACTED . / i E l /
IS ISSUED. / / ,' DESIGNED BY OTHERS � / 1::::::..... ... I I / / / N
AT A MOISTURE CONTENT WITHIN OPTIMUM AND +3 PERCENT WET OF / / _ e /" " ` ` I }::: I / / / / / V)
OPTIMUM. COMPACTION TESTS SHALL BE PERFORMED BY THE ON-SITE / / /_ / ,.."` } I I i 1 I Z
11. A GRADING PERMIT WILL NOT BE ISSUED UNTIL THE TOWN OF CARY HAS RECEIVED GEOTECHNICAL ENGINEER DURING CONSTRUCTION TO VERIFY THAT THE // / // > // / / \ } 1 i "1 I I / / // / / /
NOTIFICATION FROM THE ECOSYSTEM ENHANCEMENT PROGRAM THAT A RECEIPT HAS BEEN PROPER COMPACTION LEVEL HAS BEEN REACHED. THE FILL SHOULD BE / // / \ I I ` I: I I I l / / w
8 PLUG VALVE EMERGENCY � / / / /
ISSUED TO THE DEVELOPER AND THE LOCAL GOVERNMENT STATING THE NITROGEN / °.: . I ( I / , / Z
COMPACTED USING A SHEEPSFOOT TYPE COMPACTOR. IN ORDER TO PREVENT / / , DRAWDOWN FOR UPPER POND /11 / / ,� I I I: I I / W
BUYDOWN HAS BEEN COMPLETED. DAMAGE TO THE PIPE, NO COMPACTION EQUIPMENT SHALL CROSS ANY PIPE / / - / I I I I / -
/ THE VALVE SHALL BE STYLE / / �, I I 1 / / -- /
UNTIL MINIMUM COVER IS ESTABLISHED ALONG THE PIPE. / 820 X-CENTRIC VALVE OR APPROVED / / I I I . ...\`.. I i / o a
12. THE PROJECT WILL MEET ALL OF THE REQUIREMENTS RELATIVE TO BEST MANAGEMENT w / I I I / / o '-
PRACTICES AND ENGINEERED STORMWATER CONTROL STRUCTURES AS OUTLINED IN THE I / EQUAL. THIS VALVE SHALL BE IN / / I I I I 1>:; rr 1 � I I ( / I -1 / / t
5. A KEY TRENCH SHALL BE PROVIDED BENEATH ALL FILL AREAS OF THE ACCORDANCE WITH AWWA C-504 / / I 0-4 I I I 10 - �
TOWN OF CARY UNIFIED DEVELOPMENT ORDINANCE. / I INV. = EL. 356.501 1 I I 1 - o m
BERM. THE TRENCH SHALL EXTEND A MINIMUM OF 5 FT BELOW EXISTING :: ,o SEC. 5.5, AND SHALL BE OPERABLE / / I w I i I I -- F V)
CRADE AND SHALL HAVE A MINIMUM BOTTOM WIDTH OF 5 FEET. THE KEY / FROM FINISHED GRADE i // a: I I I I 1 } \ I ( , / V) a
TRENCH SIDESLOPES SHALL BE A MINIMUM OF 1:1 (H:V). THE KEY TRENCH i.:: :: '. _ --- "" l 1 } \ \ \ a
1 - ( ::: :'
SHALL BE COMPACTED TO THE SAME SPECIFICATION LISTED IN ITEM 2 ABOVE. / .':: . l i -_ -- / /, I I I \ \ \ 1 \ \ \ �- Z co o
® SOU S IFICAMONS / . / � � - � I . , \ \ /
e / TW = 372.00 \ \ \ \ \ N
l'>, »
.
_- � try .:..:,.I.'.: ',; �.. _ \
0 0
» 6. UPON REQUEST, THE CONTRACTOR SHALL PROVIDE THE ENGINEER WITH '::::� =.: :; .: _:.: _=j� �� � 18 LF 12 sD DIP e / � BW 355.00• 1 1 \ \ \ \ ^� �-+ 1 I
1. THE 42 RCP OUTLET BARREL SHALL BE CLASS III RCP, MODIFIED BELL AND SPIGOT, REPORTS TO VERIFY THAT THE DAM EMBANKMENT MEETS THE SPECIFIED a : .'. __' 11 � INV. IN EL = 367.00_- '' �' L \ \ \ \ \ \ \ \ m o 0
MEETING THE REQUIREMENTS OF ASTM C76-LATEST. THE PIPE SHALL HAVE CONFINED COMPACTION REQUIREMENTS. COMPACTION REPORTS WILL BE NEEDED DURING =`l :-`/ � IN OUT EL = 360.00 I ` \ \ \ \ \ \ \ \ \ N N
O-RING RUBBER GASKET JOINTS MEETING ASTM C-443-LATEST. THE PIPE JOINTS SHALL THE AS-BUILT CERTIFICATION PROCESS FOR THIS STORMWATER FACILITY. / : :tr�/ / I-/ -- PO 1:;',. ..:" \ \ \ \ \ \ \ \ \ \ Ix ,� m
/ _- � o � ND 1 LOWER ;,';1_... \ \ \ \ \ \ < Q
BE TYPE R-4. THEREFORE, IT IS THE CONTRACTORS RESPONSIBILITY TO ENSURE ;:.xY-.; ':. . _ __I- / � } \ \
COMPACTION TESTS ARE PROPERLY PERFORMED DURING CONSTRUCTION. / • / , / '- =_I- NORMAL POOL = EL 361.00 \ \ \ \ \ \ \ \
2. THE STRUCTURAL DESIGN FOR BOTH THE WEIR WALL FROM THE UPPER POND TO THE / / - s �' _--- BOTTOM OF POND = EL 355.00 I 1 1 \ \ \ \ \
LOWER`POND AND THE RISER OUTLET STRUCTURE WITH EXTENDED BASE AND CONCRETE Q -' -_ o a ---------`-- } I [: I I i I I I } \ \ \ \ \ \ \ \ \ \
CAP TRASHRACK SHALL BE BY OTHERS. PRIOR TO ORDERING THE STRUCTURE, THE SPILLWAY PIPE SUBGRADE SUPPORT ":< - `- - - RETAINING WALL (DESIGN BY I I I I I I \ \ \ \ \ \
CONTRACTOR SHALL PROVIDE THE ENGINEER WITH SHOP DRAWINGS, SEALED BY AN P.E. BEj DDIN S IFI TI N - - - // OTHERS). SEE NOTES I \ j- I I �� � ( I \\ \\ 1 \ \ \\ \ \ \\ \
G PEC CA O S .. . I
REGISTERED IN NORTH CAROLINA, FOR REVIEW. :': - 3) \ \ 1 I I I I 1 1 \ A.. .. .. .... .. .. .... .
1. FILL IN THE AREA OF THE SPILLWAY PIPE AND ADJACENT AREAS SHOULD `- - = ` -- - -- 1 \ I ( I
^. ..
' I { 1 1 1
I \
i
i
1
I
1 �n
3. THE RISER OUTLET STRUCTURE SHALL BE PROVIDED WITH STEPS 16 ON CENTER. BE BROUGHT UP TO A POINT OF 2 TO 3 OR MORE ABOVE THE TOP - - I I
_• I I
W F THE RISER STRUCTURE. STEPS PIP IN VAN F �Pt WAY CONSTRUCTION THAT _ -- %: :.' -:: \ \ I ',:' ". I I p c�
STEPS SHALL BE PROVIDED ON THE INTERIOR ALL 0 ELEVATION OF THE E ADVANCE O LL CO STRUC SO __-- :. . t ;: :, l \ \ I I \ � �
SHALL BE IN ACCORDANCE WITH NCDOT STD. 840.66. PLEASE REFER TO SHEET SW-1 B THE SPILLWAY PIPE CAN BE INSTALLED IN A TRENCH CONDITION. ONCE THE :' : . . \ \ \ I I \ \ I
FOR LOCATION OF THE RISER STEPS. FILL IS BROUGHT UP TO ABOVE THE TOP OF PIPE, THE PIPE TRENCH - -._. = 1 \ ` j I / I � Z
I
_ - a
SHOULD THEN BE EXCAVATED FOR INSTALLATION OF THE PIPE. ::.. --- ..::._.... ..I. 0 3-:;'.:,. .:;;::: .; _ _:.TW:.: 365.5Q I / // 1
:. BW - OQ
LOCK SHALL PRECAST AS THE `` , �i = 355 00' 5. 1 1 \ I ® "� a o
4. THE;,8 Lx8 Wx24 THICK CONCRETE ANTI-FLOTATIONB ........ :, :. , : >... 35 0 I // \
TW 3 \ I \ \ I
I , 'd ' 1
V. • EL 356.50, ..` 3� BW 0 I
A R FLOW OCCUR IN R N THE PIP ALIGNMENTS, :.. . : _.:..:::::.. ::.:. _....°. L \ E
EXTENDED BASE OF THE RISER BOX DURING FABRICATION. THE PRECAST BASE SHALL BE 2. IF SEEPAGE 0 S 0 ALONG E E " ''" \ I \ I /
INCLUDED AS PART OF THE SHOP DRAWINGS THAT WILL BE SUBMITTED TO THE ENGINEER GROUNDWATER CONTROL WILL BE NECESSARY. THIS COULD INVOLVE �" �\ \\ ( I \ %.>
\ ' �..I��. l l 1 I I i
FOR REVIEW (SEE ITEM 2 ABOVE). PUMPING (OR STREAM DIVERSION, ETC.) DEPENDING ON THE TOPOGRAPHY. . : ; : \ \ 1':. . 1;` I 1 \\ I I i / I / x
SINCE IT IS NECESSARY TO WORK IN A "DRY" CONDITION, THIS SITUATION ... ".. .. \ \ \ ( I / F
..::.
I
5. TALL RISER STRUCTURES SHALL BE CONSTRUCTED WITH WATERTIGHT WADS AND MAY REQUIRE USE OF LEAN CONCRETE BACKFILL FLOWABLE FILL ETC. TO 78 _ \ I U p
\ I I / Q'i
_.� a .... . . �? ..... w.. .• . . •. . .':.: `.'.' \ \ ( I
WATERTIGHT WALL AND PIPE CONNECTIONS. ESTABLISH SUBGRADE CONDITIONS SUITABLE FOR SOIL TYPE BACKFlLL f " :::.:: _--- , \ ( / z
PLACEMENT. .::::. - - \.... ;, . ` ; ; : :: `:::1'.:,.. , ;.: 1 I ( / � W
6. THE PRECAST RISER STRUCTURE SHALL HAVE A SHIPPING WEIGHT OF 28,066 LBS. THE --- PRECAST RISER OUTLET STRUCTURE I I I I I W ?,
•..
- SHAPE = CIRCULAR \ : :.:::...:. : :.. 7 : I I l I U) CQ a
I
STRUCTURE WEIGHT SHALL BE THE SHIPPING WEIGHT AND SHALL BE DETERMINED BY 3. PRIOR TO INSTALLATION, SUBGRADE CO�,'DITIONS ALONG THE SPILLWAY - _ _..,.....:, t. . ;.,. I I I I I I � / -
SUBTRACTING THE WEIGHT OF THE FACTORY BLOCKOUTS FROM THE GROSS STRUCTURE PIPE SHOULD BE EVALUATED BY THE ON-SITE GEOTECHNICAL ENGINEER TO I \"- 3 (� :"+ - :..:::'.... ::: I I I l I e- -4 Q
TO I = 362.00 B \ i I I I I 1 / l l
WEIGHT. THIS INFORMATION SHALL BE SHOWN ON THE SHOP DRAWINGS SUBMITTED TO THE ASSESS WHETHER SUITABLE BEARING CONDITIONS EXIST AT THE SUBGRADE - - INVE T IN 1-1.5' WEIRS = 1.00
ENGINEER FOR REVIEW. LEVEL SHOULD SOFT OR OTHERWISE UNSUITABLE CONDITIONS BE ... �s- - - I /;` ." I I I I I I 1 I '_}, W
ENCOUNTERED ALONG THE PIPE ALIGNMENT, THESE MATERIALS SHOULD BE INVERT OUT 4 Q 5 I I I I I n =
7. PRIOR TO ORDERING, THE CONTRACTOR SHALL SUBMIT TRASH RACK SHOP DRAWINGS UNDERCUT AS DIRECTED BY THE GEOTECHNICAL ENGINEER. THE UNDERCUT � (SEE DETAIL SHEET SW-1 B) I I I i I I I I I I I I :' t
....... .. ..
I I l I I I t I =
TO THE ENGINEER FOR REVIEW. MATERIALS SHALL BE REPLACED WITH ADEQUATELY COMPACTED STRUCTURAL \ ``f`''..:; l / I I =__ O
CONTRACTOR SHALL PRO`/!DE i
............ ... t _ t
FILL LEAN CONCRETE OR Fl_OWABLE FILL AS DIRECTED BY THE ON-SITE I l I 1 : :}'' °
/ 1 __
STEP IN ACCORDANCE
WITH 1 / _
I 1 -
NIENGINEER. /Y GEOTECHNICAL I P I DA U --
8. ALL POURED CONCRETE SHALL BE MINIMUM 3000 S (28 ) UNLESS OTHERWISE -__ g _ ,i
NOTED. \� --\ NC OT STD. 840.66. STEPS ,
4. FlU MATERIAL ADJACENT TO THE 42"O 0-RING OUTLET BARREL SHALL --- SHALL BE PLACED AT 16 /O.C. a / / / / / / / 41 LF 42 0 O-RING RCP /
9. GEOIEXTILE FABRIC FOR THE 42-INCH OUTLET BARREL JOINTS SHALL BE AMOCO STYLE MEET THE SPECIFICATIONS LISTED IN ITEMS 1 THROUGH 3 ABOVE. THE S DETAIL SHEET SW/-1 B / / / (JOINT'S WRAPPED IN �/ -
4553 POLYPROPYLENE NON-WOVEN NEEDLE PUNCHED OR ENGINEER APPROVED EQUAL CONTRACTOR SHALL PAY SPECIAL ATTENTION TO THE COMPACTION EFFORTS I / O ® / / / / / / / / / / / I IGEOTEXTILE FABRIC) ® 7.32% ' i� ,��i
(NON-WOVEN FABRIC) ALONG THE PIPE TO ENSURE THAT ALL SPACES UNDER AND ADJACENT TO / I I / / / / / / / / / / " D
/ / _ .` t
THE PIPE ARE FILLED WITH PROPERLY COMPACTED MATERIAL. I / / / / / / / / / / / / -
i
10. POND EMERGENCY DRAWDOWN IS VIA AN 8"sb PLUG VALVE. THE VALVE SHALL BE A - // / // / / // / / / // / / / ®. 1, /;
M&H STYLE 820 X-CENTRIC VALVE OR APPROVED EQUAL THIS VALVE IS IN ACCORDANCE G Obi` E I / ❑ / / / 1 /
WITH AWWA C-504 SEC. 5.5, AND SHALL BE OPERABLE FROM TOP OF OUTLET / / / r P I
/ I / / / / / / / / / ,
/ / / CYO C / / // / / / / / /� '/ / / / / /
1. TESTING OF THE NEW FILL MATERIALS SHALL BE PERFORMED TO VERIFY I r' _-/ / / / r- i / / / /. { / F = x
STRUCTURE VIA A HANDWHEEL (SEE DETAIL). THE CONTRACTOR SHALL PROVIDE A / / � / / / ( / / / -� - , _ _- °%
REMOVABLE VALVE WRENCH WITH A HANDWHEEL ON TOP FOR OPERATION OF THE 8"O THAT THE RECOMMENDED LEVEL OF COMPACTION H ACHIEVED DURING / l / // I -512® // // / /1 (- 'n -_" / ' "I / / 42 ENDWALL -f--"
PLUG VALVE. A CHAIN AND LOCK SHALL ALSO BE PROVIDED FOR SECURING THE WRENCH CONSTRUCTION. THEREFORE, ONE DENSITY TEST SHALL BE PERFORMED FOR / / / / a / �/ \ ` - / / /INV. OUT EL = 336.00
TO THE TRASH RACK. EVERY 2,500 SQUARE FEET OF AREA FOR EVERY LIFT OF FILL / / / / � 336 LF 42 0 0-RING RCP \ \ /� / I
\ / / �' / 1-1,0 2.83% W/ CONCRETE /I \\ / / / e r. (SEE DETAIL SW-1 C) 'A
2. TESTING WILL BE REQUIRED ALONG THE 42" 0-RING OUTLET BARREL AT � / / CRADLE (SEE DETAIL / \ ✓p // / , / / ' £��-- - / _
A FREQUENCY OF ONE TEST PER 25 LF OF PIPE PER VERTICAL FOOT OF \ / // / SW-1 B} (JOINTS WRAPPED-/ ) I / / / ff =jF '; x F � B
FILL _ _ / // // IN GEOTEXTILE FABRIC) \ - / ��/ // / / / _: VELOCITY DISSIPATOR 0
\ / / � '/ /
�r.�. `� NCDOT CLASS 1 RIP RAP
STATE � OF PONSIB \ // / / / / 6 / / // // / , / \ sR\ - / / / ..-� :£-E l 36'L X 27'W X 30" THICK
/ / / / / / \ I / / /�v'
ALL REQUIRED MAINTENANCE AND INSPECTIONS OF THIS FACILITY SHALL BE -- \ / --1 / / / / / / I \ '\ `/ e / ' SEE DETAIL SHEET SW-1 C
THE RESPONSIBILITY OF THE PROPERTY OWNER'S ASSOCIATION, PER THE I / / / / / I I \ \ 1 I {, I
/ / / 1^5 11 6 0 JUNCTION BOX , / ) / I } " =-1
EXECUTED OPERATION AND MAINTENANCE AGREEMENT FOR THIS FACILITY. \ / / / / (\ RIM EL. = 351.25 / / / ) / / x--"� °{'' '_'= ` / //
EMBANKMENT ��j / / / » - = / ( / 5 FES INVERT OUT - 336.90
/ / / / 42 0-RING RCP INVERT IN = 345.00 / / (\ I / �' , e ig;_� ;- /
118 LF - 3" CAST-IN-PLACE \ / / / / / / / 42 0-RING RCP INVERT OUT = 339.00 © / / / y\ I / I I I � I , / �
/ \ \ / / / / / ` Z I
CONCRETE UP STUBBED ABOVE GRADE \ / / - / I i
CHANNEL SHALL BE LINED WITH UP ELEV. = 336.75 \ / // / / ,/ lam' /' / / / / /» // // / I\ I I - 4 } 4- � `�}' / ' /
0. \ / / / / 66 LF 15 O 0-RING RCP \ I I I 1 ! 1; � � � / , / I L.Cm-a ENDWALL '' LANDNGLO TURF REINFORCEMENT // / / / / / / / ® 0.53%. JOINTS WRAPPED I ; r
: MATTING 450 AND SEEDED PER " \ \ / l l / / // / I / / ( - \ I I _ ; f 1 I// \
�- s / / / / - IN GEOTEXTLE FABRIC I
o ______� `" SEEDING SCHEDULE (SEE LINING \ - / 1 )
ii 3 FEET OF 3 LAYER OF #57 STONE J I l �/
' ai' I l
r 18" 0-RING RCP ANCHOR DETAILS SHEET SW-5 - / / / / / I ( / / i I I l , Ir f r /
NATURAL GRADE = EL 336.50 // / l // // / l / / \ I I s - t i l l
/ // /
rn iNYERT OUT EL 336.90 `118 LEVEL SPREADER lI/ _N � I 6, � / / / 4' � JUNCTION BOX / ' I " 1 I._ ,, ,,,,
m INVERT IN = 337.25 j 50 LF 15 O O-RING
\ --- // i i / ' INVERT OUT = 337.15 `f"(SEE DETAIL SHEET SW-1A) /a t� - \ I / , r RCP 0 0.50% (JOINTS EL 336.75 / a- » - \ I // //, WRAPPED IN / / I ! :_ = i t-7",12» I I 1 ° ir
; 6 ( ') II -1 1 I 1 \\ / / 1I \ >� i=a }=____-_ Y �' II///Ii
12 `"a w , I I // i // ,� / GEQTEXTILE FABRIC � '-'` = I �I
(, 3 ,- ..g. I I I-I I I I ( ( I I (- GRAPHIC SCALE
ELEV. = 335.90 IIII 3A. CAST-IN- CE CONCRETE) I I-1 I I-1 SEEDBED PREPARATION TEMPORARY SEEDING SCHEDULE PERMANENT SEEDING SCHEDULE 50 0 25 5D 100 g
o - 11 ,-- .. I , I-, I i
u- UNDISTURBED EART}� I ""� _-I I 1.) CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF
.; °. :" I-I I (-1 1 I-I I I AVAILABLE. SEEDING DATE SEEDING MIXTURE APPLICATION RATE SEEDING DATE SEEDING MIXTURE APPLICATION RATE
� III I . '' . '. . I I I-i I I I I 1 2.) RIP THE ENTIRE AREA TO 6 INCHES DEPTH. 1 inch = 50 ft.
NERAL NOTES: EiNFORCED CONCRETE FOOTING 3.} REMOVE ALL LOSE ROCK, ROOTS, AND OTHER OBSTRUCTIONS LEAVING SURFACE REASONABLY SMOOTH JAN 1 - MAY 1 RYE (GRAIN) 120 LBS/AC AUG 25 - OCT. (BEST) TALL FESCUE 200 LBS/AC
3 1. UP OF LEVEL. SPREADER TO BE COMPLETELY LEVEL AT
AND UNIFORM. KOBE LESPEDELA 50 LBS/AC FEB. - APR 15 (POSSIBLE)
I ELEV. 336.75 TO ENSURE UNIFORM SPREADING OF FLOW. -) I I- 1. 12" _I I 11 I I-1 I I- I 4.) APPLY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL (SEE MAY 1 - AUG 15 GERMAN MILLET 40 LBS/AC SOIL AMENDMENTS IL ,„
BELOW*). APPLY LIME AND FERTILIZER ACCORDING TO SOIL TESTS, OR APPLY 4000 LB/ACRE -S P-0 3 5 FEB 2 4 2009
r_ ANY PORTION OF-UP FOUND TO BE NOT LEVEL WILL BE 5.} CONTINUE TILLAGE UNTIL AWELL-PULVERIZED, FIRM REASONABLY UNIFORM SEEDBED IS PREPARED 4 TO AUG 15 - DEC 30 RYE (GRAIN) 120 LBS/AC
LD REJECTED AND WILL BE REBUILT. AT CONTRACTOR EXPENSE. 6 INCHES DEEP. SOIL AMENDMENTS GROUND AGRICULTURAL LIMESTONE AND 1000 LB/ACRE 10-10-10 FERTILIZER. APPROVED
U 6.) SEED ON A FRESHLY PREPARED SEEDBED AND COVER
2. LEVEL SPREADER SHOULD BE CONSTRUCTED ON 7.� MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LB/AC GROUND M!Il.GH DFNR-WATER'QUALITY
� CROSS-SECTION p' p PROJECT No.
_ AGRICULTURE LIMESTONE AND 750 LB/AC 10-10-10 FERTILIZER ( FROM AUG TOWN OF CARY TIA�DsWIDsTORmwATETt[IRPN SRF-05000
UNDISTURBED SOIL AND NOT ON FILL 6. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS WITHIN THE PLANTING APPLY 4000 LB/AC STRAW.-ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, TOWN r v
3 SEASON, IF POSSIBLE. IF STAND SHOULD BE OVER 60% DAMAGED, REESTABLISH FOLLOWING ORIGINAL LIME, 15 - DEC 30, INCREASE 10-10-10 FERTILIZER TO 1000 LB/AC). OR A MULCH ANCHORING T001 A DISK WITH BLADES SET NEARLY STRAIGHT CAN
0 3. THE TRIANGULAR CHANNEL SHOULD BE CONSTRUCTED ON 6. REFER TO SHEET SW-5 FOR FURTHER DETAILS. FERTILIZER AND SEEDING RATES. SEED LIGHTLY WITH SEEDING EQUIPMENT OR CULTIPACK AFTER SEEDING. MULCH BE USED AS A MULCH ANCHORING TOOL. N SRF-05000_PD
o A ZERO PERCENT GRADE. 9.} CONSULT CONSERVATION INSPECTOR ON MAINTENANCE TREATMENT AND FERTILIZATION AFTER PERMANENT APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, Approved b Date DESIGNED BY:
CD
Y 7. ALTERNATE CONSTRUCTION OPTIONS FOR THE LEVEL COVER IS ESTABLISHED. OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN MAI�d E Pp y `__
? BE seasonal a BE USED AS A MULCH ANCHORING TOOL. INSPECT AND REPAIR MULCH FREQUENTLY. REFERTILIZE IN LATE WINTER OF THE PlanningDate
w 4. THE TRIANGULAR CHANNEL SHOULD BE ,LINED WITH SPREADER CAN BE SUBMITTED TO THE DESIGN ENGINEER BY application schedule Dom' BY: TRM
MAINTENANCE FOLLOWING YEAR; USE SOIL TESTS OR APPLY 150 LB/ACRE 10-10-10. MOW
0 LANDLOK TURF REINFORCEMENT MATTING 450 OR ENGINEER THE CONTRACTOR FOR REVIEW. ANY ALTERNATE REGULARLY TO A HEIGHT OF 2-4 INCHES. Engineering Date SCALE:
APPROVED EQUIVALENT. THE TRM MATTING SHOULD BE CONSTRUCTION OPTION MUST ENSURE THAT THE LEVEL JAN 1 - AUG 15: REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. 1 50'
€ ANCHORED PER THE DETAILS PROVIDED. THE TRM MATTING SPREADER IS COMPLETELY LEVEL AT TEE LENGTH AND RESEED, REFERTILIZE, AND MULCH IMMEDIATELY NURSE PLANTS
ai SHOULD BE INSTALLED PER MANUFACTURER'S SPECIFICATIONS. ELEVATION SHOWN ON THE DESIGN DRAWINGS AND ENSURES FOLLOWING EROSION OR OTHER DAMAGE. BETWEEN MAY 1 AND AUG. 15, ADD 15 LB/ACRE SUDANGRASS OR 10 LB/ACRE DATE' 09-19-08
c SHEET FLOW. AUG 15 - DEC 30: REPAIR AND REFERTILIZE DAMAGED AREAS IMMEDIATELY. GERMAN MILLET. BEFORE MAY 1, OR AFTER AUG. 15, ADD 40 LB/ACRE RYE (GRAIN). ALL CONSTRUCTION SHALL BE IN ACCORDANCE
to 5. THE 3-INCH LAYER OF #57 STON SHALL BE UNDERLAIN TOP DRESS WITH 5o LB/AC OF NITROGEN IN MARCH. WITH TOWN OF CARY STANDARDS, SPECIFICATIONS sz�ET No.
o IF IT IS NECESSARY TO EXTEND TEMPORARY COVER BEYOND NOTE: PERMANENT SEEDING SCHEDULE IS FOR EXTERIOR SLOPES OF THE
WITH MIRAFI FILTERWEAVE 400 OR AP ROVED EQUIVALENT. JUNE 15, OVERSEED WITH 50 LB/AC KOBE I FSPEDErA IN BASIN, TOP OF THE BERM, AND BASIN FLOOR. AND DETAILS. _'._ w-1A
y�/��T* � LATE FEBRUARY OR EARLY MARCH.
2 it L S ME ETA,Ii�S` © NQTE: USE THE TEMPORARY SEEDING SCHEDULE ONLY WHEN DATE IS NOT
9 CORRECT TO USE THE PERMANENT SEEDING SCHEDULE. Mc1�D1�MS
2 N.T.S. FINAL DRAWING - RELEASED FOR CONSTRUCTION
2
u

o
RIM EL. = 351.25
45• ELBOW
W z �I
NCDOT STD. 840.54 ('TYp,) 4" DIA. PERFORATED y �
NOTES: �SEEE DETAIL <° a : o ° PVC (SCH 40 ASTM
° 90 ELBOW D1785) tx
1.AMT 1 2�O.C.PS TO BE PROVIDED MID) (1YP.) � a N
2. STEPS SHALL BE IN ACCORDANCE NO. 57 STONE 7" (TYP.) m P.
z � W
WITH NCDOT $TD. 840.66 • < NDTEs: a z E N
•...,a �`a z QQ3
NO. 57 STONE a o$ W1 * THIS PRECAST ENDWALL MAY BE USED FOR THE FOLLOWING Z==6
0 !b rp-n {G7 (FT.) D 6" t4O0 r d l�
,. ,,.. ••^ rnz = i STANDARDS: 838.21, 838.27 838.33 AND 838,39 D_~z
0 0 0 0 S FT. DIAMETER , �2 GQ ® > ! " INSTALL PRECAST ENDWALLS WITH WINGS AND PAY d�V)=
to 0 0 00�0 ) `a•; k1����G `` =O Z a rn -"'-"---- '-----"--- - - USE 400ACCORDANCE
PSI CON RETEH PECIFICATION SECTION 838. WF p \ E IN C D E S
�- o0�1 n�p © =CADO 1-0". 1,_O"� P C Q '.. ^I
0 0 0�o a• ,.a 7" (TYP.} - e.' t�` Z �O H * FORPROVIDE GRADEL60 ANDFORCING WELDED WIREL WHICH MEETS ASTM F FABRIC CONFORMING A615 �LL zG_j by
0 0 0 e " •q CO=70 Z ;---------. '��' , TO ASTM A185 WITH 2" MIN. CLEARANCE. p O Uj< W UW
336 LF 2 -+a
n a a PLACE LIFT HOLES OR PINS IN ACCORDANCE WITH Z
T 0-RING RCP ® -c 1 H2 H2 OSHA STANDARD 1928.704. f-�>.•� z
" .• t0 2.83% z ' 1 CS/RCP ]HI H1 ; * PIPE TO BE GROUTED INTO HEADWALL AT JOB SITE BY W 0
336 LF 42 0 CONTRACTOR o �
0-RING RCP G� ALL ELEMENTSrPRECAST TO MEET ASTM C913. z
.• \\ I * WELDED WIRE FABRIC MAY BE SUBSTITUTED FOR REBAR W + a
INV.=345.00
• •' `. 6' DIA. PRE-CAST MANHOLE � _ ., ', 1�'D - " CHAMFER ALLAS LONG AS THE SAME CORNEAS 1AR"EOROHAVEEAL IS RBIUSOOFDED:
is
8" O..C.(TYP.) ®{IIBBI
'Ti °'--REFER°TOTCHART 6' `•``�FOREBAR SIZE T W
© 'a FOR BAR SIZE NOTE: THE MINIMUM BAR SIZE SHALL BE #5 BARS
0 0 ".•4-:,• RI AT 8" CTS.THE CONTRACTOR WILL HAVE THE OPTION = -T 0� o••O°•••s•
j a INV.=343. 7 41 LF 42" 0 H m c ELEVATION SIDE TO INCREASE THIS BAR SIZE AS NEEDED. a "O Q °•FE�j$/ °
O-RING RCP 0 " z cy ;O10
4.0 LF 4 DIA. H 3 O3 �-
INV.=339.00 7.32% ' CA : Z' AL
PERFORATED PVC "' _ Z
NON-WOVEN GEOTEXTILE , -a W a. e 29977
2° (SCH 40 ASTM D1785) N _.__.._.. ____ ___ ENDWALL DIMENSIONS < H
END CONCRETE CRADLE­/ 1120 (TREVIRA SPUNBOUND = a wz (gT,) .- o YJ o
CE
FT. MINIMUM MIN jMAX MIN./MAX MIN./MAX MIN /MAX. MIN.IMAX.
OR ENGINEER APPROVED = o z --. --.---- _. y v .
NO. 57 STONE EQUAL) c 0 D PIPE DIA. BAR SIZE r H1(FT ) H2(FT.) D (FT ) - Wi ._W2 � n ��9,�'�N I �••° �"
66 LF 15" 0 � �� 1.0 1 #5 @ 8" 1 1.25/2 00 2 00/3 75 1 2511 75 3 00/3 75 5 50/6.00 < � � ,i ••..N` -.l %
1' 4. -RING RCP N m 0i� 1.25 1 #5 @ 8" 1.25/2.00 3.00/3.75 1.25/2.00 3.50/3.75 6.50/6.75 Z' Z = I e,
NON-WOVEN GEOTEXTILE 11207 PLAN VISIT 0 0.50X -0 m 1.50 1 #5 @ 8 1.25/2 00 3 00/4.25 1 50/2 50 3.50/3.75 6 50/6.75
TREVIRA SPUNBOUND 0 2.0 1 #5 @ 8 1.50/2 50 4 00/4 75 1 75/2 50 4 00/4 25 7 50/8.25 a
-- - _..
EN INEER APPROVED EQUAL m F' D 2.5 #5 @ 8 , 2.50/3 50 4 00/6 00 2 00/3 00 4 50/5 50 10 00/11.50 Csp N w
Q } 3.0 #5 @ 8" i 3.00/3 50 r 5 00/6 00 2 75/3 50 5 25/5 75 11 50/11.75 V o 'Ti _. - -------------------
0 -
„ ..-; - - .
a o \•6�yQ 1 3.5 #5 @ 8° 13.25/4 50 6 00/6.75 3 25/3 50 6 00/6.75 12.00/13.25 Z W W
c r f . 4.0 #5 @ 8" j 3.50/4 50 ;6 50/7.00 3.25/3 50 6 50/6.75 13.00/13.25 W i
_. ..- -
°. e. e• a PLAN 4.5 #5 @ 8" j 4.00/5.P06.50/8.50 3.25/4.00 ! 7.00/9,25 13.50/15.75 - d. ii N
5.0 #5 @ 8" 4.50/5.00 7.00/8.50 3.25/4.00 7.26/9.25 13.75/15.75 lil
5.5 #5 @ 8" 4.50/5 00 '7 50/8.50 3 25/4 00 7 25/9 25 14 00/15.75 Z
s criON v�Ir _. - - - _ .
- _ - ----- _-.
" 6.0 i #5 @ 8" i 4.50/5.00 �7.50/8.50 3.25/4 00 7.75/9.25 14.75/16.75 �
J
SHEET 1 OF 1 SHEET 1 OF 1 �U
66 LF 15" 0 O-RIN 838.80 838.80 m
RCP 0 0.50% N
INV = 337.60 4ew ri`ND1► AJ1d D AI 3
JUNCHON BOX DETAIL N.T.S.
v= o
co O
N.T.S. O o 0
tr ) )
00
r N N
a A
MO
cq
Z a
E4
E-
3s' - � z
W
EDGE OF RIPRAP TO BE LEVEL
WITH EXISTING GROUND AND SLOPE
TO INVERT 0 2.5' BELOW OUTLET
PIPE INVERT ELEVATION. p�
W
z
0
O O 00�0
z O O O 00 00�0
t-jm SOLID COVER SHOWN PERFORATED. PERFORATED AVAILABLE o�, o 0 0 0 o 0 0 0
< IF SPECIFIED. >- A I A
�' z COVER SHALL STATE USE OF SYSTEM ¢Q
0 a m (LE., SEWER, STORM DRAIN, ELECTRICAL) z�_ " O�O RIPRAP INVERT IS , O O O O
D p''1 Lea. J o= 42 0-RING ry�/2.5 BELOW ) I 27
0 OUTLET PIPE
=D �'� TOP OF COVE o ~z RCP ��� ELEVA'n .
=T'z�m o ��QL- O�OC oU o� 00000
cir�H LiJ
CIO I-_ oQ
E3�
� O O B B O O O_ O O
DDT71
� z
{-I �>
H 1Awl
Ljj O OPLA
1/2' P. 42" ENDWALL
BOTTOM OF COVER- i/2'
1' R.
17 PLAN
3 PLAN OF COVER
� �z EDGE OF RIPRAP TO BE LEVEL NCDOT CLASS "1" RIP-RAP
O W 36'L x 27'W x 30" THICK
2 0 PLAN OF FRAME I. > WITH EXISTING GROUND AND SLOPE
TO INVERT 0 2.5' BELOW OUTLET
1- ® N 1 z ® 42" ENDWALL PIPE INVERT ELEVATION.
04 p� -r H e
N !M 2'-1 Y4' A 5' 14' 5' NATURAL GROUND � E
Now-
I�i F
N z P 11319 - 3/4' Q O h
+ + X D 1'--10 7/8' W t �� ,
m d Q Q 30" LAYER OF � � ' ' �500%
o ci TYPE #1 � - z 42" 0-RING CLASS '1' RIP-RAP DSImAo 10�2�n�A
g Z 3 Y4'--�I F•--y� ft
¢ L"- RCP
o £ v�' -4 Y? LEI o 0 0 -
LL
G 1 1`10 5/1r
® ® - -
3 < ALTERNATE SECTION B-B z Z III I ( " I ( (-
4 FILTER BLANKET
o s'I7 4 21 Ill° MINIMUM WEIGHTS - LBS. Li I I III I I _
, i i , i I 1 O'7-SP 035
-g 1/4 FRAME - 180 I I_ ( FILTER BLANKET (SEE NOTE) T1
COVER - 120 1J
SECTION A-A TOTAL - 300 RIPRAP INVERT IS 2.5' BELOW TOUVN OF CAF�Y PROJECT N0. SRF-O5O00
SPECIFICATION NOTE: FILENAMEe
OUTLET PIPE INVERT ELEVATION. SRF-05000_PD
o SHEET 1 •BF 1
CLASS 30 IRON MEETING
A FILTER BLANKET IS TO BE Approved b Date DESIGNED BY:_ ASTM A-48 SHEET 1 �]Fi INSTALLED BETWEEN THE RIP PP y JCD
84a,54 TYPE #2184a.541 RAP AND SOIL FOUNDATION. Planning
U SECTION A-ANKET Date DRAYTN HY:
CONSIST OF A�MIN MINIMUM 4" Engineering Date-
THICK
LAYER OF STONE (#57) SCALE: NTS
s UNDERLAIN WITH GEOTEXTILE. DATE: 09-19-08
Q JUNCIIONBOXDETAII, © ALL CONSTRUCTION SHALL BE IN ACCORDANCE
q "T.S Y � BIA][tRH�L�TELOCITY DISSIPAI�OR WITH TOWN OF CARY STANDARDS, SPECIFICATIONS s�ET No.
AND DETAILS. %E-3 I w-1
ai N.T.S.
FINAL DRAWING - RELEASED FOR CONSTRUCTION McA. A S
o.
a

.STORMWATER PO O RUCTIONS IFICAMON
\ , f r ." ,;,. n
GENE E SOIL ®MPAV 1 I®N e� Nw� \ , - _ { ", _ '
1. THE ON-SITE GEOTECHNICAL ENGINEER SHALL EVALUATE THE PROPOSED \ \ ' ' ' \ f f .f ° f , ,x" I
�' ,
1. ANY CONFLICTS ON THE PLANS, DRAWINGS, REPORTS, ETC. SHALL BE BROUGHT TO I \ ) .w ,a
THE DESIGN ENGINEER'S ATTENTION PRIOR TO CONSTRUCTION. 2(H):1(V) DOWNSTREAM SLOPE OF THE PROPOSED EMBANKMENT FOR \ \ \ \, �- Y®`-_° � _ -` /
STABILITY. ANY REINFORCING MEASURES NECESSARY SHALL BE CALLED FOR ' ' , \ \ \ \ ' �� `\ ,- ® r„ y.!�Ir :{_ ' .�
SUITABI2. OR TO LITY OF THE PRO PROPOSED BORROW AREA / FILL GEOTECHNICALUCTION, THE ON-SITE ENGINEER
USENIN THE DAM EMBANKMENT BY THE ON-SITE GEOTECHNICAL ENGINEER. I I ' , \ \ \ , ' I , / ,� _. \, i �� IrI_ f`�" � `
2. ALL FILL MATERIALS TO BE USED FOR THE DAM EMBANKMENT SHALL BE \ '
r t
/ KEY TRENCH. TAKEN FROM BORROW AREAS APPROVED BY THE ON-SITE GEOTECHNICAL / ' t , \ \ \ ` ' ( - I \ __
\ -
ENGINEER. THE FILL MATERIAL SHALL BE FREE FROM ROOTS, STUMPS, WOOD, �`e ` I --- � = '
3. THE ON-SITE GEOTECHNICAL ENGINEER SHALL INSPECT THE KEY TRENCH EXCAVATION _
PRIOR TO PLACEMENT OF ANY BACKFILL WITHIN THE KEY TRENCH. IF THE CONTRACTOR STONES GREATER THAN 6 , AND FROZEN OR OTHER OBJECTIONABLE , \ \ \ O O
CONSTRUCTS AND COVERS UP THE KEY TRENCH PRIOR TO INSPECTION, THEN THE KEY MATERIAL THE FOLLOWING SOIL TYPES ARE SUITABLE FOR USE AS FILL / / ` ' , \ \ \ ' ' I ' "I ® _ W �j
WITHIN THE DAM EMBANKMENT AND KEY TRENCH: ML AND CL }_ - r ;
TRENCH SHALL BE UNCOVERED AND TESTED AT THE CONTRACTORS EXPENSE. / / / \ \ \ , , /_ -_
T THE LANDSCAPE PLAN FOR THE PERMANENT 3. FILL PLACEMENT SHALL NOT EXCEED A MAXIMUM $" LIFT. EACH LIFT / / ' \ / / / / - +: ' x
4. THE CONTRACTOR SHALL REFER 0 E LA DS - `�.. fZ m r-
PLANTING PLAN / SCHEDULE. PLEASE NOTE THAT No TREES / SHRUBS OF ANY TYPE SHALL BE CONTINUOUS FOR THE ENTIRE LENGTFI OF EMBANKMENT. BEFORE / / ` \ \ \ 4=�.. -. ®°w ` ,,,� a Cat
PLACEMENT OF FILL FOR THE BERM SECTION, ALL UNSUITABLE MATERIAL / / .ter t ® r} -_ - C!1
MAY BE PLANTED ON THE PROPOSED DAM EMBANKMENT (FILL AREAS). PLACEMENT.
BE REMOVED AND THE SURFACE PROPERLY PREPARED FOR FILL / / I \ \\ \ \\ ' I ' / / / / _ _ f '� W a P.
e.
5. IF THE DRY DETENTION POND WILL BE USED AS A SEDIMENT BASIN DURING / I \ \ I / / / / / '/ I - J �' Z Z
CONSTRUCTION. THE AREA SHALL BE CLEANED OUT (LE. SEDIMENT, TRASH, ETC) AND 4. ALL FILL SOILS USED IN THE EMBANKMENT / KEY TRENCH CONSTRUCTION / / \ , , / / / / '` i = i �r'',1 z
REVEGETATED (IF NECESSARY) PRIOR TO USE AS A STORMWATER MANAGEMENT FACILITY. SHAD_ BE COMPACTED TO AT LEAST 95% OF THE STANDARD PROCTOR / \ \ I / : _�£ I P;� � g o
THIS INCLUDES THE REMOVAL OF ANY SKIMMER DEVICE USED DURING EROSION CONTROL MAXIMUM DRY DENSITY (ASTM-698). THE FILL SOILS SHALL BE COMPACTED / / / \ \ ' / / / 'r ® F: }A' ', r_ a C>: O O
THE TRASH AND SEDIMENT SHOULD BE DISPOSED OF PROPERLY (I.E. - LANDFILL). AT A MOISTURE CONTENT WITHIN -1 to +3 PERCENT OF ITS OPTIMUM / / ` I 4� ,
H d� ►c�
MOISTURE CONTENT. COMPACTION TESTS SHALL BE PERFORMED BY THE / / , ` I I I / � s, F. -./k `- f' = "''
6. THE RISER AND BARREL STRUCTURES MUST BE ON SITE BEFORE A GRADING PERMIT IS ON-SITE GEOTECHNICAL ENGINEER DURING CONSTRUCTION TO VERIFY THAT / / l / / ` U i 1'� r �, '1 ' ' W U >< cc
ISSUED. THE PROPER COMPACTION LEVEL HAS BEEN REACHED. THE FlLL SHOULD BE / / / I I ( / ,%r- ' tr '�- / `�JI '` _ ,4 -
COMPACTED USING A SHEEPSFOOT TYPE COMPACTOR. IN ORDER TO PREVENT / I / / I` f � � ` �`=, �,, ' ',�
7. A GRADING PERMIT WILL NOT BE ISSUED UNTIL THE TOWN OF CARY HAS RECEIVED Ary I I I I I I I / / / / wr{ -.{' -/ " I ^ � -,
DAMAGE TO THE PIPE, NO COMPACTION EQUIPMENT SHALL CROSS ANY PIPE ra {' { / Z W O °-+
NOTIFICATION FROM THE ECOSYSTEM ENHANCEMENT PROGRAM THAT A RECEIPT HAS BEEN UNTIL MINIMUM COVER IS ESTABLISHED ALONG THE PIPE. i "� ,z I + I I I I / / , j r /I' , , 7 '
ISSUED TO THE DEVELOPER AND THE LOCAL GOVERNMENT STATING THE NITROGEN / / I I / f , r , I_ ''� I ✓'j p"
` , . * � - V
BUYDOWN HAS BEEN COMPLETED. 5. A KEY TRENCH SHALL BE PROVIDED BENEATH ALL FILL AREAS OF THE i i / / / // I I I I / j£r ,,/ {:` I I \ ' r_ }�{ II ,!Tall/
8. THE PROJECT WILL MEET ALL OF THE REQUIREMENTS RELATIVE TO BEST MANAGEMENT BERM. THE TRENCH SHALL EXTEND A MINIMUM OF 5 FT BELOW EXISTING i I / / , f_= y } . _ :__ Z _-Ve � - _,�,f:- f - I ,vex"' '®'"'
GRADE AND SHALL HAVE A MINIMUM BOTTOM WIDTH OF 5 FEET. THE KEY i ' I ' I I ' J r / `I .'\{f II( ,.� C .�,
PRACTICES AND ENGINEERED STORMWATER CONTROL STRUCTURES AS OUTLINED IN THE TRENCH SIDESLOPES SHALL BE A MINIMUM OF 1:1 (H:V). THE KEY TRENCH , I P OF DAM - 342.G0 I ,.f - ' \ e41 °°• ° '
TOWN OF CARY UNIFIED DEVELOPMENT ORDINANCE. SHALL BE COMPACTED TO THE SAME SPECIFICATION LISTED IN ITEM 2 ABOVE. ` ' I I (10- Wi�?E MIN.) �� � j` I }®III OF.ESS/'°
6. UPON REQUEST, THE CONTRACTOR SHALL PROVIDE THE ENGINEER WITH1.
/ / ' , I I I I I I / ={ I \ I ° A
C®N V PREP AM REPORTS TO VERIFY THAT THE DAM EMBANKMENT MEETS THE SPECIFIED / / 1 , �- w _.- � -' `h3,`'-,- = 977 :
COMPACTION REQUIREMENTS. COMPACTION REPORTS WILL BE NEEDED DURING , I I I ( { - _-, I I I °
f °
1. PRIOR TO PLACEMENT OF THE NEW FILL, THE AREAS ON WHICH FlLL IS THE AS CERTIFICATION PROCESS FOR THIS STORMWATER FACILITY. / __ I t I I I � v �__ ,{_ I ! I y,�•°,�G I N��i,o' ®®
TO BE PLACED SHALL BE CLEARED AND STRIPPED OF TOPSOIL, TREES, THEREFORE, IT IS THE CONTRACTOR'S RESPONSIBILITY TO ENSURE / 4 6 I _ = v` i I I �' °••°° o``
ROOTS, VEGETATION, AND OTHER OBJECTIONABLE MATERIAL THE AREAS ON COMPACTION TESTS ARE PROPERLY PERFORMED DURING CONSTRUCTION. - - I I I __ _h t = I 'o. X-
WHICH FILL IS TO BE PLACED SHALL BE SCARIFIED. / I ` ( _ I I
2. ANY REMOVED TOPSOIL SHALL BE STOCKPILED FOR USE IN PLANTING / / / I I ` -� -- I I I
(SEEDING) ON THE DAM EMBANKMENT ONCE FINAL GRADES (AS SHOWN ON PITiLW� �` Cam' �j'` S � D / I I I I I _ - " _ �._ _ _ (rI�
,�R _ ' I
THE GRADING PLAN) HAVE BEEN ESTABLISHED WITH COMPACTED FILL. _ 3bB / - ` - - - 3 1 I ` = ;;' F= _ -_ W
�r ^ �°. f
3. THE CONTRACTOR SHALL FURNISH, INSTALL, OPERATE, AND MAINTAIN ANY DID S TI`"N�7 4 I , } , ' I ` 3�1 1N� t i �,- l° l 11 !� N
PUMPING EQUIPMENT, ETC. NEEDED FOR REMOVAL OF WATER FROM VARIOUS 1-11 `\, ' ` ly , f I� ; .I '' - ` �/ / / W
PARTS OF THE STORMWATER POND SITE. IT IS ANTICIPATED THAT PUMPING 1. FILL IN THE AREA OF THE SPILLWAY PIPE AND ADJACENT AREAS SHOULD / \ ` \ ,,� \ `-11 i r .FLOG CAI Y�, } , �T f`�
WILL BE NECESSARY IN THE EXCAVATION AREAS (I.E. - KEY TRENCH). BE BROUGHT UP TO A POINT OF 2' TO 3' OR MORE ABOVE THE TOP -_ \ \ / I , , , � ® `y : _} � N" 1- `vy,-' r f ��J 6 J
DURING PLACEMENT OF FILL WITHIN THE KEY TRENCH (OR OTHER AREAS AS ELEVATION OF THE PIPE IN ADVANCE OF SPILLWAY CONSTRUCTION SO THAT \ � - / ` ' I , II /
THE SPILLWAY PIPE CAN BE INSTALLED IN A TRENCH CONDITION. ONCE THE ` \ , f v ,/ "} '
NECESSARY}. THE CONTRACTOR SHALL KEEP THE WATER LEVEL BELOW THE \ \ , - , i "Ff+ `=q
FILL IS BROUGHT UP TO ABOVE THE TOP OF' PIPE, THE PIPE TRENCH ( - : ,I II 0 m
BOTTOM OF THE EXCAVATION. THE MANNER IN WHICH THE WATER IS o � c ` I \ \ (o \ 1 _ _: '- `= � a � :' ` : _: i o m
REMOVED SHALL BE SUCH THAT THE EXCAVATION BOTTOM AND SIDESLOPES SHOULD THEN BE EXCAVATED FOR INSTALLATION OF THE PIPE. „� \ \ „� � ' ,,� ") N ' F ,;.,/ - - f; ® I-A
_ ; i t I W
ARE STABLE. -- , "� v I �i {n 3 1 4 ' ", 4°" '$ �r=' I V 3
2. IF SEEPAGE OR FLOW OCCURS IN OR ALONG THE PIPE ALIGNMENTS, \ I I \ ' � :- � f ,;}: �� 1 � O
GROUNDWATER CONTROL WILL BE NECESSARY. THIS COULD INVOLVE \ I \ ' I \ "'� >� ' - 'f ® i W * N o
S j C► ®N PUMPING (OR STREAM DIVERSION, ETC.) DEPENDING ON THE TOPOGRAPHY. \ I PO�1D FLOOR _ ;_ - } _ � Z I I
„ \ \ \ \ \\ I SHALL BE SL�PED \ \ ' - X A� I O o 0
SINCE IT IS NECESSARY TO WORK IN A DRY" CONDITION, THIS SITUATION I 1.q0% MINIMU TOI—,�3 .;z \ '+ r � ' , � `�1. THE 36" RCP OUTLET BARREL SHALL BE CLASS III RCP, MODIFIED BELL AND SPIGOT MAY REQUIRiv USE OF LEAN CONCRETE BACKFILL, PLOWABLE FILL, ETC. TO \ \ \ \ \\ - \ i3' ��r�)rO 's I I 0 0
\ � \ \ OUTLET 4= _ .+ _ = { sI 1- C�''� l'} � I � N N
MEETING THE REQUIREMENTS OF ASTM C76-LATEST. THE PIPE SHALL HAVE CONFINED ESTABLISH SUBGRADE CONDITIONS SUITABLE FOR SOIL TYPE BACKFILL \ \ J ' 4t LF 38" 0 RING '-�\ `� ` W
O-RING RUBBER GASKET JOINTS MEETING ASTM C-443-LATEST. THE PIPE JOINTS SHALL PLACEMENT. _ \ \ \ ( - \ (_ I I \ p i _ - '� ' I Q m
\ \ ' -_ WR PED- _
BE TYPE R-4. . _ I a A
3. PRIOR TO INSTALLATION, SUBGRADE CONDITIONS ALONG THE SPILLWAY � \ \ � \ \ / ANTI-kEP COLIIARS (X2) I 1N`GEO E`XTILE FABRIC){` `y 11 - i I
2. THE STRUCTURAL DESIGN FOR THE 6-FT. (INTERNAL DIAMETER) RISER STRUCTURE WITH PIPE SHOULD BE EVALUATED BY THE ON-SITE GEOTECHNICAL ENGINEER TO � \ \ \ \ / SEEP C LLARS FOR 36"s6 , �` 'f £ .-_ = - i III
JD T,,; -c
EXTENDED BASE SHALL BE BY OTHERS. PRIOR TO ORDERING THE STRUCTURE, THE ASSESS WHETHER SUITABLE BEARING CONDITIONS EXIST AT THE SUBGRADE \ \ \ O-RING RCP T6 BE SPACED I ', � `- : =; s r __ _ 'V` /II
CONTRACTOR SHALL PROVIDE THE ENGINEER WITH SHOP-DRAWINGS, SEALED BY AN P.E. LEVEL SHOULD SOFT OR OTHERWISE UNSUITABLE CONDITIONS BE \ \ SHAPE = gC�RCU \ AT '-0" O.0 (SEE DEVIL �- ,_ F - i= _
REGISTERED IN NORTH CAROLINA, FOR REVIEW. ENCOUNTERED ALONG THE PIPE ALIGNMENT, THESE MATERIALS SHOULD BE � \ INSIDE�DIAMI}TER = 6 FT. , � i - - i=_�M ; �£j � � i
\ \ �, \ \ \ syEET SW-2c . cdLLARS I I 1
„ UNDERCUT AS DIRECTED BY THE GEOTECHNICAL ENGINEER. THE UNDERCUT \ \ \ MISER CESTE ATIO�V = 40.50 HALL BE P ED A MINIMUM , , P ='L ='{ems _ }f _ II A
3. THE RISER OUTLET STRUCTURE SHALL BE PROVIDED WITH STEPS 16 ON CENTER. MATERIALS SHALL BE REPLACED WITH ADEQUATELY COMPACTED STRUCTURAL \ \ I �ERT i (9" OR*CE} = 37.20 \ \ / OF 2 FEET OM PIPE JOINTS. I I = _ _ - I. i i ~ _ w
STEPS SHALL BE PROVIDED ON THE INNER WALLS OF THE RISER BOX. STEPS SHALL BE FILL, LEAN CONCRETE OR FLOWABLE FILL AS DIRECTED BY THE ON-SITE \ INVERT OU (3�"� a-RING R P) = 336. � / I \ ,- .r = r s' z - - � � k
IN ACCORDANCE WITH NCDOT STD. 840.66. PLEASE REFER TO SHEET SW-2C FOR GEOTECHNICAL ENGINEER. � \ \ \ \ I � I __ ` '__ ` -_, i -1 _ a� p cat
LOCATION OF THE RISER STEPS. \ \ \ \ \ \ \ \ \ \ / I I \ , ` _" ' + " F{ 3 _ I ( ' / W ''�
4. FILL MATERIAL ADJACENT TO THE 36"O O-RING OUTLET BARREL SHALL \ \ \ \ \ I \ / \ IB}: _ => } , . - aT! ,t. 1- I
4. THE 10'Lx10'Wx30" THICK CONCRETE ANTI-FLOTATION BLOCK SHALL PRECAST AS THE MEET THE SPECIFICATIONS LISTED IN ITEMS 1 THROUGH 3 ABOVE. THE \ \ \ \ \ \ \ \ \ \ \ \ / I (W ' -' r-~.r: y - _ v, _-- 1 I I I I z
EXTENDED BASE OF THE RISER BOX DURING FABRICATION. THE PRECAST BASE SHALL BE CONTRACTOR SHALL PAY SPECIAL ATTENTION TO THE COMPACTION EFFORTS t \ I I t� h ;` }° - _ ® � a
INCLUDED AS PART OF THE SHOP DRAWINGS THAT WILL BE SUBMITTED TO THE ENGINEER ALONG THE PIPE TO ENSURE THAT ALL SPACES UNDER AND ADJACENT TO \ \ \ , \ \ / F i I I `-- E-+
FOR REVIEW (SEE ITEM 2 ABOVE}. THE PIPE ARE FILLED WITH PROPERLY COMPACTED MATERIAL \ 't \ \ ' \ \ s _ "I -1 F r _i�` r _ - 3` I U� � w U
5. THE RISER STRUCTURE JOINT DESIGN SHALL CONFORM TO ASTM C-478. THE JOINTS TI;.SS"I�1TG OF E NT \ \ \ \ \ ANTI�SEEP COL'ARS'(X2)�SEE \ \ I I ° j I1H W U) a
f ALL PE12 ICD}T_t=; ;. �, - z
SHALL BE SEALED USING BUM RUBBER SEALANT CONFORMING TO ASTM-990. THE \ COLLARS FOR 1 "s6 RIN RCP TO I 38:$0 - _ } '- �=`± J r j jI __' AA w o
CONTRACTOR SHALL PARGE JOINTS ON BOTH THE INSIDE AND OUTSIDE WITH NON-SHRINK 1. TESTING OF THE NEW FlLL MATERIALS SHALL BE PERFORMED TO VERIFY \ \ \ \ �" \ / „ Pq
I I / Q; P
BE SPACED T 15- O.O. (S O_ t ( 6 1tC�)
GROUT. THAT THE RECOMMENDED LEVEL OF COMPACTION IS ACHIEVED DURING 1 \ \ ` ~ L;= 335,8 = tom- ,= l i � '
CONSTRUCTION. THEREFORE, ONE DENSITY TEST SHALL BE PERFORMED FOR I \ \ DETAIL SHE SN�-2C�. R I \ _ _r j r-` } 'Ey} I I /
r �E PELACE A INI 0 2 I \6. THE PRECAST RISER STRUCTURE SHALL HAVE A SHIPPING WEIGHT OF 43,650 LBS. THE EVERY 2,500 SQUARE FEET OF AREA FOR EVERY LIFT OF FILL. Q \ \ � / ``=_r -__; _.,` -"..-'`-_:=`-fix `, �_ �STRUCTURE WEIGHT SHALL BE THE SHIPPING WEIGHT AND SHALL BE .DETERMINED BY � � \ FRPMPPE UOINTS. I t \ \ i / � ,�_ f, _ _ *r= ,,4 I I 11 � 1SUBTRACTING THE WEIGHT OF THE FACTORY BLOCKOUTS FROM THE GROSS STRUCTURE 2. TESTING WILL BE REQUIRED ALONG THE 36" O-RING OUTLET BARREL AT � ' , ' � ( _ __ „ s
WEIGHT. THIS INFORMATION SHALL BE SHOWN ON THE SHOP DRAWINGS SUBMITTED TO THE ,q FREQUENCY OF ONE TEST PER 25 LF OF PIPE PER VERTICAL FOOT OF \ , , I ' \ \ ' / I� ;'w ®£__ I I , I / ® z
ENGINEER FOR REVIEW. FILL. I � \ , , ' ' l \ \ \ , ' I / �� f r _1 -__= I I�/
_ { h
7. PRIOR TO ORDERING, THE CONTRACTOR SHALL SUBMIT TRASH RACK SHOP DRAWINGS • I I ' \ \ \ \ \ \ I / Alw / ,z - - _ = _{ I I '/ / O
TO THE ENGINEER FOR REVIEW. CONTRACTOR SHALL ENSURE THAT AN ACCESS HATCH IS STATEMENT F PONSIB \ \ {_ _ -
PROVIDED WITHIN THE TRASH RACK (SEE DETAIL FOR LOCATION) THAT WILL ALLOW FOR ALL REQUIRED MAINTENANCE AND INSPECTIONS OF THIS FACILITY SHALL BE I ' ' ` \ \ \ \ I ® f I- `� � I '� ®l
FUTURE MAINTENANCE ACCESS. CONTRACTOR SHALL ALSO PROVIDE A CHAIN AND LOCK THE RESPONSIBILITY OF THE PROPERTY OWNt"R'S ASSOCIATION. PER THE ` ` \ \ \ \ \ \ l ® i�,> a £t ' z F I ®/
FOR SECURING THE ACCESS HATCH. EXECUTED OPERATION AND MAINTENANCE AGREEMENT FOR THIS FACILITY. ' I \ \ \ \ \ / s �_ ` { '` - _' I I '
8. ALL POURED CONCRETE SHALL BE MINIMUM 3000 PSI (28 DAY) UNLESS OTHERWISE \ \ \ \ ' © - _ / I + III
NOTED. I I \ \ \ \ \ \ / 1 f -� . } �,.. _
/\ 1 I \ \ \ \ f -F; 7_1 y , I I III
9. GEOTEXTILE FABRIC FOR THE 36-INCH OUTLET BARREL JOINTS SHALL BE AMOCO STYLE I \ \ \ \ ' ' I �' -{ r &, _ - i 1 II /
4553 POLYPROPYLENE NON-WOVEN NEEDLE PUNCHED OR ENGINEER APPROVED EQUAL I \ , ' \ I .� / VELOCITY DISSIPATOR - I _r {'_ .{ l I III /
(NON-WOVEN FABRIC) I I \ \ r _'°
\ \ ( / :NCDOT CLASS 'B' RIP RAP = ,=r s- =�__ /
/ I I I \ \ \ / / ®`f 18'L X 21'W X 22" THICK _° M1 {_ _ -' i 'II /10. DRY DETENTION POND EMERGENCY DRAWDOWN IS VIA AN 8 fe PLUG VALVE. THE / \ \ �=}_: (SEE DETAIL SHEET SW-2C) � 4 /
VALVE SHALL BE A M&H STYLE 820 X-CENTRIC VALVE OR APPROVED EQUAL THIS VALVE ` ` / I \ \ \ I n- f . g _ � ==
IS IN ACCORDANCE WITH AWWA C-504 SEC. 5.5, AND SHALL BE OPERABLE FROM TOP OF �yy��,I I I \ \ \ \ \ � I � / j - t} _} -4= - � s _, / /I
OUTLET STRUCTURE VIA A HANDWHEEL (SEE DETAIL). THE CONTRACTOR SHALL PROVIDE A �S ORRICE HEAD ALL (BEET DETAIL HEET SW- \ •f a $ _r I/
REMOVABLE VALVE WRENCH WITH A HANDWHEEL ON TOP FOR OPERATION OF THE 8"� �� „ g 1 I I , ` _ _ ='
PLUG VALVE. A CHAIN AND LOCK SHALL ALSO BE PROVIDED FOR SECURING THE WRENCH 6 ORIFICE VERT = 36.00 l \ ` \ ` „ / / I
\ \ I 5 LF 1 0 RCP ' ` €F= 29.II: L'itV L ,� __ 1• I/
/ I \ I I 0.45% / / ` ''^ 'SPREADER' a _
TO THE TRASH RACK. "� n
_ _
/ / = EL35 fZ 0 0 @
11. THE 18"� RCP OUTLET PIPE SHALL BE CAPPED WITH A METAL ORIFICE PLATE. THE / / I \ \ \ I ' / / �:r '-h� "-0 SET=,bET-__:` _-' xv -. - % I '/ I
PLATE SHALL BE „ „ „ AND SHALL HAVE A " / / / /x24 „ = _ SHEET sw s 2A ; w = �: / I #00% % 0
BO®M. PLEASE REFER TO dET�L SHEEfESWC FOR ADDI7IONALSNFORMATION.TE / / ' \ I / / ' /- r_14=1L__11_1 1\/_,\.,_�._�.,� ,�z-, �-� " ,/1 - / / 8 tS/INVERT OUT 35.7 - / J
- _ //
_ { 4 . --
_ EMBANKMENT
29 LF - 3" CAST-IN-PLACE CONCRETE
Pi LIP STUBBED ABOVE GRADE
o UP ELEV. = 335.50
CHANNEL SHALL BE LINED WITH -���� 1,1 n>
a ENDWALL f-- LANDLOK TURF REINFORCEMENT ~ ' k
1 . MATTING 450 AND SEEDED PER „ , ,
c I ` _ 3 FEET OF 3 LAYER OF #57 STONE 03 a �14)
SEEDING SCHEDULE (SEE UNING
r 15" 0-RING RCP ANCHOR DETAILS SHEET SW-5)
m INVERT OUT EL 335.75 1 NATURAL GRADE = EL. 335.25 o4tO��,�,Ary vtotb
C_4 - %, - 6v - I . r /Lb Wo k1i (L)
_ :. „ SEEDBED PREPARATION TEMPORARY SEEDING SCHEDULE PERMANENT SEEDING SCHEDULEev
•0 12" I I 1 12 •�. . 6 ( ) I I ( I I I I_I I ( III 1.) CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF
a ( _ 1 1 _ AVAILABLE. SEEDING DATE SEEDING MIXTURE APPLICATION RATE SEEDING DATE SEEDING MIXTURE APPLICATON RATE
. I I ' I I-III III 2.) RIP THE ENTIRE AREA TO 6 INCHES DEPTH.
-' 3 JAN 1 - MAY 1 RYE (GRAIN) 120 LBS/AC AUG 25 - OCT. (BEST) TALL FESCUE 200 LBS/AC
of s 3.) REMOVE ALL LOSE ROCK, ROOTS, AND OTHER OBSTRUCTIONS LEAVING SURFACE REASONABLY SMOOTH GRAPHIC SCALE
-� , e
M. KOBE
LO ELEV. = 334.75 I i 3 .:°f•" CAST-IN- ' 'CE CONCRET�I I I-I I I- 4) gppLOYRAGRICULTURAL LIME. FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL (SEE MAY 1 - AUG 15 GERMANEMIEl1ET 40 LBS/AC SOIL AMENDMENM B• - APR 15 (POSSIBLE)
30 0 15 30 60
o UNDISTURBED EARTI� I 1 I ' ( I BELOW*). (GRAIN) / APPLY LIME AND FERTILIZER ACCORDING TO SOIL TESTS, OR APPLY 4000 LB/ACRE
''" "' (-I I I-M I ( I 5.) CONTINUE TILLAGE UNTIL AWELL-PULVERIZED, FIRM REASONABLY UNIFORM SEEDBED IS PREPARED 4 TO AUG 15 - DEC 30 RYE GRAIN 120 LBS AC GROUND AGRICULTURAL LIMESTONE AND 1000 LB/ACRE 10-10-10 FERTILIZER.
y I I I + : 'Y.^ I I I-I II I I I 6INCHES DEEP. SOIL AMENDMENTS
1 inch = 30 ft.
_c GENERAL NOTES: EINFORCED CONCRETE FOOTING 6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LB AC GROUND �lLOH
3 1. LIP OF LEVEL SPREADER TO BE COMPLETELY LEVEL AT „ 7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. /
i I I- 12 1 AGRICULTURE LIMESTONE AND 750 LB/AC 10-10-10 FERTILIZER ( FROM AUG APPLY 4000 LB A
p ELEV. = 335.50 TO ENSURE UNIFORM SPREADING OF FLOW. ( _III I-I I (- I 8.) INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS WITHIN THE PLANTING 15 - DEC 30, INCREASE 10-10-10 FERTILIZER TO 1000 LB/AC). / C STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, (��J
ANY PORTION OF LIP FOUND TO BE NOT LEVEL WILL BE SEASON, IF POSSIBLE. IF STAND SHOULD BE OVER 60% DAMAGED, REESTABLISH FOLLOWING ORIGINAL LIME, OR A MULCH ANCHORING TOOL A DISK WITH BLADES SET NEARLY STRAIGHT CAN 0 ( - S P-®3 5
FERTILIZER AND SEEDING RATES. SEED LIGHTLY WITH SEEDING EQUIPMENT OR CULTIPACK AFTER SEEDING. �d BE USED AS A MULCH ANCHORING TOOL.
REJECTED AND WILL BE REBUILT, AT CONTRACTOR EXPENSE.
V 9.) CONSULT CONSERVATION INSPECTOR ON MAINTENANCE TREATMENT AND FERTILIZATION AFTER PERMANENT APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, APPROVED
COVER IS ESTABLISHED. OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN MAINTENANC
a 2. LEVEL SPREADER SHOULD BE CONSTRUCTED ON CROSS-SECTION BE USED AS A MULCH ANCHORING TOOL. INSPECT AND REPAIR MULCH FREQUENTLY. REFERTILIZE IN LATE WINTER OF THE �A/ PROJECT NO. SRF-05000
c UNDISTURBED SOIL, AND NOT ON FILL * See seasonal application schedule FOLLOWING YEAR; USE SOIL TESTS OR APPLY 150 LB/ACRE 10-10-10. MOW TOWN d N ®F. CARY
►MAJNTENANICE SRF-05000_PD
REGULARLY TO A HEIGHT OF 2-4 INCHES. Ffi.FN�:
3. THE TRIANGULAR CHANNEL SHOULD BE CONSTRUCTED ON 6. REFER TO SHEET SW-5 FOR FURTHER DETAILS. JAN 1 - AUG 15: REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. NURSE PLANTS 4,
c A ZERO PERCENT GRADE. RESEED, REFERTILIZE, AND MULCH IMMEDIATELY Approved by Date DESIGNED BY: JCD
6 7. ALTERNATE CONSTRUCTION OPTIONS FOR THE LEVEL FOLLOWING EROSION OR OTHER DAMAGE. BETWEEN MAY 1 AND AUG. 15, ADD 15 LB/ACRE SUDANGRASS OR 10 LB/ACRE PlanningDate
? 4. THE TRIANGULAR CHANNEL SHOULD BE LINED WITH SPREADER CAN $E SUBMITTED TO THE DESIGN ENGINEER BY AUG 15 - DEC 30: REPAIR AND REFERTILIZE DAMAGED AREAS IMMEDIATELY. GERMAN MILLET. BEFORE MAY 1, OR AFTER AUG. 15, ADD 40 LB/ACRE RYE (GRAIN). DRAWN BY: JCD
o LANDLOK TURF REINFORCEMENT MATTING 450 OR ENGINEER THE CONTRACTOR FOR REVIEW. ANY ALTERNATE TOP DRESS WITH 50 LB/AC OF NITROGEN IN MARCH. Engineering Date
-
IF IF IT IS NECESSARY TO EXTEND TEMPORARY COVER BEYOND NOTE: PERMANENT SEEDING SCHEDULE IS FOR EXTERIOR SLOPES OF THE SCALE: s, ,
APPROVED EQUIVALENT. THE TRM MATTING SHOULD BE CONSTRUCTION OPTION MUST ENSURE THAT THE LEVEL JUNE 15, OVERSEED WITH 50 LB/AC KOBE LESPEDEZA IN BASIN, TOP OF THE BERM, AND BASIN FLOOR. 1 =3O
ANCHORED PER THE DETAILS PROVIDED. THE TRM MATTING SPREADER IS COMPLETELY LEVEL AT TEE LENGTH AND LATE FEBRUARY OR EARLY MARCH. DAB' 09-19-OS
SO SHOULD BE INSTALLED PER MANUFACTURER'S SPECIFICATIONS. ELEVATION SHOWN ON THE DESIGN DRAWINGS AND ENSURES NOTE: USE THE TEMPORARY SEEDING SCHEDULE ONLY WHEN DATE IS NOT ALL CONSTRUCTION SHALL BE IN ACCORDANCE
c 5. THE 3-INCH LAYER OF #57 STONE SHALL BE UNDERLAIN SHEET FLOW. CORRECT TO USE THE PERMANENT SEEDING SCHEDULE. WITH TOWN OF CARY STANDARDS, SPECIFICATIONS SHEET N0.
L WITH MIRAF{ FILTERWEAVE 400 OR APPROVED EQUIVALENT. AND DETAILS. oW-'A
LEVELml
SPREADER DET
N.T.S. FINAL DRAWING - RELEASED FOR CONSTRUCTION McADAMS
N
a .

u®®I
W ---------
POND CONSrRUC110N SPECMCAIIONS _
GEME SOIL ANT) OMPA O S TIO
ANTI-SEEP COLLARS (X2)\SEEP {m f,
1. ANY CONFLICTS ON THE PLANS, DRAWINGS, REPORTS, ETC. SHALL BE BROUGHT TO 1. THE ON-SITE GEOTECHNICAL ENGINEER SHALL EVALUATE THE PROPOSED _ COLLARS FOR 18"0 0-RING RCP TO / / 50 LF 18"0 RC
THE DESIGN ENGINEER'S ATTENTION PRIOR TO CONSTRUCTION. 2(H):1(V) DOWNSTREAM SLOPE OF THE PROPOSED EMBANKMENT FOR - _ BE SPACED AT 15'-d" O.C. ("SEE / 0 0.50% r ;
STABILITY. ANY REINFORCING MEASURES NECESSARY SHALL BE CALLED FOR DETAIL MEET SW-3C . COL.LA{ S Vr
SHALL BE PL :=
2. PRIOR TO CONSTRUCTION, THE ON-SITE GEOTECHNICAL ENGINEER SHALL VERIFY THE BY THE ON-SITE GEOTECHNICAL ENGINEER. ) ` --
SUITABILITY OF THE PROPOSED BORROW AREA / FILL FOR USE IN THE DAM EMBANKMENT EEr A MINIMUM OF2
ET-� FE FROM PIPE JOINTS ' � ZN '- '��
/ KEY TRENCH. 2. ALL FILL MATERIALS TO BE USED FOR THE DAM EMBANKMENT SHALL BE \ / v 1
TAKEN FROM BORROW AREAS APPROVED BY THE ON-SITE GEOTECHNICAL
3. THE ON-SITE GEOTECHNICAL ENGINEER SHALL INSPECT THE KEY TRENCH EXCAVATION
ENGINEER. THE FlLL MATERIAL SHALL BE FREE FROM ROOTS, STUMPS, WOOD, �� \ / `; f{ A ® p
PRIOR TO PLACEMENT OF ANY BACKFILL WITHIN THE KEY TRENCH. IF THE CONTRACTOR STONES GREATER THAN 6", AND FROZEN OR OTHER OBJECTIONABLE
CONSTRUCTS AND COVERS UP THE KEY TRENCH PRIOR TO INSPECTION, THEN THE KEY MATERIAL. THE FOLLOWING SOIL TYPES ARE SUITABLE FOR USE AS FILL \ \ ' _
TRENCH SHALL BE UNCOVERED AND TESTED AT THE CONTRACTOR'S EXPENSE. WITHIN THE DAM EMBANKMENT AND KEY TRENCH: ML AND CL ! ' I / / }, =y W Z I
= P Ca
� � ® ; '
4. THE CONTRACTOR SHALL REFER TO THE LANDSCAPE PLAN FOR THE PERMANENT 3. FILL PLACEMENT SHALL NOT EXCEED A MAXIMUM 8" LIFT. EACH LIFT
SHALL BE CONTINUOUS FOR THE ENTIRE LENGTH OF EMBANKMENT. BEFORE 4 .___ \ P. �
PLANTING PLAN / SCHEDULE. PLEASE NOTE THAT NO TREES / SHRUBS OF ANY TYPE PLACEMENT OF FILL FOR THE BERM SECTION, ALL UNSUITABLE MATERIAL \ \ ' / f' s
MAY BE PLANTED ON THE PROPOSED DAM EMBANKMENT (FILL AREAS). SHALL BE REMOVED AND THE SURFACE PROPERLY PREPARED FOR FILL f - ' W a
IN DURING PLACEMENT. \ \ / ! ® / Z N
5. IF THE DRY DETENTION POND WILL BE USED AS A SEDIMENTBASv. }_ i Z
CONSTRUCTION, THE AREA SHALL BE CLEANED OUT (I.E. SEDIMENT, TRASH, ETC) AND r4,
REVEGETATED (IF NECESSARY} PRIOR TO USE AS A STORMWATER MANAGEMENT FACILITY. 4. ALL FILL SOILS USED IN THE EMBANKMENT / KEY TRENCH CONSTRUCTION / ® ` - 41.0' LEVEL M : O p
SHALL BE COMPACTED TO AT LEAST 95% OF THE STANDARD PROCTOR W ORIFICE HEADWALL (SEE L I SPREADER - R4 � 0 o
THIS INCLUDES THE REMOVAL OF ANY SKIMMER DEVICE USED DURING EROSION CONTROL MAXIMUM DRY DENSITY (ASTM-698). THE FILL SOILS SHALL BE COMPACTED " ( I / ® --EL. 323.50 \ E-H 0 ►O
THE TRASH AND SEDIMENT SHOULD BE DISPOSED OF PROPERLY (I.E. - LANDFILL). AT A MOISTURE CONTENT WITHIN -1 to +3 PERCENT OF ITS OPTIMUM P SHEET SW- C) _++ r .-a 1
6. THE RISER AND BARREL STRUCTURES MUST BE ON SITE BEFORE A GRADING PERMIT IS MOISTURE CONTENT. COMPACTION TESTS SHALL BE PERFORMED BY THE
6 ORIFICE' = 3a4.00 l I l/ f I ® �F ''SHEET SWi 3A)° �s ±s W U
ON-SITE GEOTECHNICAL ENGINEER DURING CONSTRUCTION TO VERIFY THAT AB-- \ } . � ;, Z
ISSUED. THE PROPER COMPACTION LEVEL HAS BEEN REACHED. THE FILL SHOULD BE v, / / / _ r_
7. A GRADING PERMIT WILL NOT BE ISSUED UNTIL THE TOWN OF CARY HAS RECEIVED COMPACTED USING A SHEEPSFOOT TYPE COMPACTOR. IN ORDER TO PREVENT a`
ENHANCEMENT PROGRAM THAT A RECEIPT HAS BEEN DAMAGE TO THE PIPE, NO COMPACTION EQUIPMENT SHALL CROSS ANY PIPE �, ' 4 ,, ', "� �® "Y`: W w
NOTIFICATION FROM THE ECOSYSTEME UNTIL MINIMUM COVER IS ESTABLISHED ALONG THE PIPE. N k \
ISSUED TO THE DEVELOPER AND THE LOCAL GOVERNMENT STATING THE NITROGEN } +,
BUYDOWN HAS BEEN COMPLETED. 5. A KEY TRENCH SHALL BE PROVIDED BENEATH ALL FILL AREAS OF THE ' I j i
BERM. THE TRENCH SHALL EXTEND A MINIMUM OF 5 FT BELOW EXISTING _ `
®,®e
8. THE PROJECT WILL MEET ALL OF THE REQUIREMENTS RELATIVE TO BEST MANAGEMENT GRADE AND SHALL HAVE A MINIMUM BOTTOM WIDTH OF 5 FEET. THE KEY
o.a e u a u'eee®'
PRACTICES AND ENGINEERED STORMWATER CONTROL STRUCTURES AS OUTUNED IN THE / /
TRENCH SIDESLOPES SHALL BE A MINIMUM OF 1:1 (H:V). THE KEY TRENCH 1 I = , r' F o°° .••° 'TOWN OF CARY UNIFIED DEVELOPMENT ORDINANCE. ®°/ ,®
�, ,•• ESS/0 ®.0
SHALL BE COMPACTED TO THE SAME SPECIFICATION LISTED IN ITEM 2 ABOVE. ' / / / ' N°L , ,F. , .? f ��F a.
6. UPON REQUEST, THE CONTRACTOR SHALL PROVIDE THE ENGINEER WITH
CONSMUCI10N P T[ON REPORTS TO VERIFY THAT THE DAM EMBANKMENT MEETS THE SPECIFIED + ~ 29
COMPACTION REQUIREMENTS. COMPACTION REPORTS WILL BE NEEDED DURING 356 `�' __ i f - °, �2Q
{
1. PRIOR TO PLACEMENT OF THE NEW FILL, THE AREAS ON WHICH FILL IS THE AS-BUILT CERTIFICATION PROCESS FOR THIS STORMWATER FACILITY. f .3• ,r r .'9Ty• CI
TO BE PLACED SHALL BE CLEARED AND STRIPPED OF TOPSOIL, TREES, THEREFORE, IT IS THE CONTRACTOR'S RESPONSIBILITY TO ENSURE
= .
ROOTS, VEGETATION, AND OTHER OBJECTIONABLE MATERIAL THE AREAS ON COMPACTION TESTS ARE PROPERLY PERFORMED DURING CONSTRUCTION. 18" FES INVERT OUT 323 75' ' f N `v Ih -` Ff r
WHICH FILL IS TO BE PLACED SHALL BE SCARIFIED.
2. ANY REMOVED TOPSOIL SHALL BE STOCKPILED FOR USE IN PLANTING SHAPE = CIRC
(SEEDING) ON THE DAM EMBANKMENT ONCE FINAL GRADES (AS SHOWN ON SPEUdWAY PIPE SUBGRADE SUMPT AM INSIDE DIAMETER = 6 FT.
THE GRADING PLAN) HAVE BEEN ESTABLISHED WITH COMPACTED FILL RISER CREST LEVATION 3 8.50 "� o �M�) ® ,' f r j z��/ cn
}
��rr c► ���� �A �•. z
BEDDING SPEC CATIONS NVERT IN (6" ORIFICE) = ;p652q � N3. THE CONTRACTOR SHALL FURNISH, INSTALL, OPERATE, AND MAINTAIN ANY I VERT OUT ( 6"O O-RING 324.00 W
PUMPING EQUIPMENT, ETC. NEEDED FOR REMOVAL OF WATER FROM VARIOUS ` I '{
PARTS OF THE STORMWATER POND SITE. IT IS ANTICIPATED THAT PUMPING 1. FILL IN THE AREA OF THE SPILLWAY PIPE AND ADJACENT AREAS SHOULD {� f A `
` ems►`' :, `` � '��� �� �� �I
WILL BE NECESSARY IN THE EXCAVATION AREAS (LE. - KEY TRENCH). BE BROUGHT UP TO A POINT OF 2' TO 3' OR MORE ABOVE THE TOP r7 w p �� t { - `- % / ` bi
'.. _=
ELEVATION OF THE PIPE IN ADVANCE OF SPILLWAY CONSTRUCTION SO THAT u' �j�` OP OF DAM 332. _ F
DURING PLACEMENT OF FILL WITHIN THE KEY TRENCH (OR OTHER AREAS AS
THE SPILLWAY PIPE CAN BE INSTALLED IN A TRENCH CONDITION. ONCE THE ti 10-FT. WIDE
NECESSARY), THE CONTRACTOR SHALL KEEP THE WATER LEVEL BELOW THE FILL IS BROUGHT UP TO ABOVE THE TOP OF PIPE, THE PIPE TRENCH / / (
BOTTOM OF THE EXCAVATION. THE MANNER IN WHICH THE WATER IS SHOULD THEN BE EXCAVATED FOR INSTALLATION OF THE PIPE. / , -
REMOVED SHALL BE SUCH THAT THE EXCAVATION BOTTOM AND SIDESLOPES l / { { f '` %`{ ,'� l' 1 9
ARE STABLE. ` 's = ®'�4 �- �' � � r �l it 3
2. IF SEEPAGE OR FLOW OCCURS IN OR ALONG THE PIPE ALIGNMENTS, f / / 1 I i , `- � o
GROUNDWATER CONTROL WILL BE NECESSARY. THIS COULD INVOLVE / / r =# ` 15/�/ CO3
14 o
PUMPING (OR STREAM DIVERSION, ETC.) DEFENDING ON THE TOPOGRAPHY. r PO FLOOR I J / I I
®N SINCE IT IS NECESSARY TO WORK IN A DRY" CONDITION, THIS SITUATION ''t: `f. ' :F' _ ,l / /�% r0 0 0
" f / / BE SLOPED "� �p }/ i
7� ' o 0
1. THE 36 RCP OUTLET BARREL SHALL BE CLASS III RCP, MODIFIED BELL AND SPIGOT, MAY REQUIRE USE OF LEAN CONCRETE BACKFILL, FLOWABLE FILL, ETC. TO \ 1.00% MINIMUM TO Hj , t 3 } . _ ;_ f
MEETING THE REQUIREMENTS OF ASTM C76-LATEST. THE PIPE SHALL HAVE CONFINED ESTABLISH SUBGRADE CONDITIONS SUITABLE FOR SOIL TYPE BACKFILL I - N
O-RING RUBBER GASKET JOINTS MEETING ASTM C-443-LATEST. THE PIPE JOINTS SHALL PLACEMENT. ( _,
BE TYPE R-4.
3. PRIOR TO INSTALLATION, SUBGRADE CONDITIONS ALONG THE SPILLWAY -
A A BY TH ON--SITE GEOTECHNICAL ENGINEER TO - =`
2. THE STRUCTURAL DESIGN FOR THE 6-FT. (INTERNAL DIAMETER) RISER STRUCTURE WITH PIPE SHOULD BE EV LU TED E S \ /
EXTENDED BASE SHALL BE BY OTHERS. PRIOR TO ORDERING THE STRUCTURE, THE ASSESS WHETHER SUITABLE BEARING CONDITIONS EXIST AT THE SUBGRADE I r :k"i _
CONTRACTOR SHALL PROVIDE THE ENGINEER WITH SHOP DRAWINGS, SEALED BY AN P.E. LEVEL SHOULD SOFT OR OTHERWISE UNSUITABLE CONDITIONS BE
REGISTERED IN NORTH CAROLINA, FOR REVIEW. ENCOUNTERED ALONG THE PIPE ALIGNMENT, THESE MATERIALS SHOULD BE / / _ = * -
UNDERCUT AS DIRECTED BY THE GEOTECHNICAL ENGINEER. THE UNDERCUT
3. THE RISER OUTLET STRUCTURE SHALL BE PROVIDED WITH STEPS 16" ON CENTER. MATERIALS SHALL BE REPLACED WITH ADEQUATELY COMPACTED STRUCTURAL
FILL, LEAN CONCRETE OR PLOWABLE FILL AS DIRECTED BY THE ON-SITE r
STEPS SHALL BE PROVIDED ON THE INNER WALLS OF THE RISER BOX. STEPS SHALL BE
IN ACCORDANCE WITH NCDOT STD. 840.66. PLEASE REFER TO SHEET SW-4C FOR GEOTECHNICAL ENGINEER. / r / / \ / - - II
LOCATION OF THE RISER STEPS. ' l r / / / / \ ® - f = �� `ifF`'
4. FILL MATERIAL ADJACENT TO THE 36"0 0-RING OUTLET BARREL SHALL ' / / / / / / of I _, .v3== t i / I W n z
4. THE 10'Lx10'Wx30" THICK CONCRETE ANTI-FLOTATION BLOCK SHALL PRECAST AS THE MEET THE SPECIFICATIONS LISTED IN ITEMS 1 THROUGH 3 ABOVE. THE ' / / _ f = , f /// C) � a .4
CONTRACTOR
EXTENDED BASE OF THE RISER BOX DURING FABRICATION. THE PRECAST BASE SHALL BE CONTRACTOR SHALL PAY SPECIAL ATTENTION TO THE COMPACTION EFFORTS / / "� , x = "/// // = o
INCLUDED AS PART OF THE SHOP DRAWINGS THAT WILL BE SUBMITTED TO THE ENGINEER ALONG THE PIPE TO ENSURE THAT ALL SPACES UNDER AND ADJACENT TO
FOR REVIEW SEE ITEM 2 ABOVE).
THE PIPE ARE FILLED WITH PROPERLY COMPACTED MATERIAL
( / � / / r �-t f•"� ,=}ter,� �� }:�� ,� - r _ �,�_v ,.� /� / � / ,� F �:
5. THE RISER STRUCTURE JOINT DESIGN SHALL CONFORM TO ASTM C-478. THE JOINTS ®F'� ` E ` / / / _ / l
SHALL BE SEALED USING BUM RUBBER SEALANT CONFORMING TO ASTM-990. THE _ -`._ ` `==t f f 50 LF OF 36 0 0-RING w o
CONTRACTOR SHALL PARGE JOINTS ON BOTH THE INSIDE AND OUTSIDE WITH NON-SHRINK 1• TESTING OF THE NEW FILL MATERIALS SHALL BE PERFORMED TO VERIFY / / _
.- .� �� �,.� �� �.� � - � � RCP (JOINTS WRAPPED Q' � z
/ / / / / / ♦ . ` d {~ _{ II ( IN GEOTEXTIL.E FABRIC W
GROUT. THAT THE RECOMMENDED LEVEL OF COMPACTION IS ACHIEVED DURING / / / / / fF} ~ h�' ) W
CONSTRUCTION. THEREFORE ONE DENSITY TEST SHALL BE PERFORMED FOR / / / _ -` - f y ® d.50ib.
6. THE PRECAST RISER STRUCTURE SHALL HAVE A SHIPPING WEIGHT OF 43,650 LBS. THE EVERY 2,500 SQUARE FEET OF AREA FOR EVERY LIFT OF FILL. / / / / / / / / '` : f} ♦ v ' `} 11� 1-4
�
.r
STRUCTURE WEIGHT SHALL BE THE SHIPPING WEIGHT AND SHALL BE DETERMINED BY '{ - u
SUBTRACTING THE WEIGHT OF THE FACTORY BLOCKOUTS FROM THE GROSS STRUCTURE '„
WEIGHT. THIS INFORMATION SHALL BE SHOWN ON THE SHOP DRAWINGS SUBMITTED TO THE 2. TESTING WILL BE REQUIRED ALONG THE 36 0-RING OUTLET BARREL AT s
ENGINEER FOR REVIEW. A FREQUENCY OF ONE TEST PER 25 LF OF PIPE PER VERTICAL FOOT OF / / / / / / / ''`' v ® ` `f I(£ .F #. _ _ ®�f� /� Z
FILL.
7. PRIOR TO ORDERING, THE CONTRACTOR SHALL SUBMIT TRASH RACK SHOP DRAWINGS 358 / / `- /
��+�p�a C� / ® '' +�� �' ,. �..F`
TO THE ENGINEER FOR REVIEW. CONTRACTOR SHALL ENSURE THAT AN ACCESS HATCH IS ATElr11 N 1 OF PONS11[3 e
PROVIDED WITHIN THE TRASH RACK (SEE DETAIL FOR LOCATION) THAT WILL ALLOW FOR ALL REQUIRED MAINTENANCE AND INSPECTIONS OF THIS FACILITY SHALL BE <(j f __ ,- _�i► _ i
FUTURE MAINTENANCE ACCESS. CONTRACTOR SHALL ALSO PROVIDE A CHAIN AND LOCK THE RESPONSIBILITY OF THE PROPERTY OWNER'S ASSOCIATION, PER THE ( / / �.. ,�• _''' i
FOR SECURING THE ACCESS HATCH. EXECUTED OPERATION AND MAINTENANCE AGREEMENT FOR THIS FACILITY. 100-YEAR �' j = '' VELOCITY DISSIPATOR
fi
t � I � FLOOD PLAIN .. �_ {��, ti�_�� ,�`, � � -_ r {_ � NCDOT CLASS 'B' RIP RAP
8. ALL POURED CONCRETE SHALL BE MINIMUM 3000 PSI (28 DAY) UNLESS OTHERWISE / " r t= = _ =fi
NOTED. ANTI-SEED CO R 2 SEE _ 8 L X 21 W X 22 THICK
NDWALL PER NCDOT STD. 838.01 _ {r `` =
" ( ) INV. OUT 36" O-RING RCP = i ~ A f / (SEE DETAIL SHEEP SW-3C)
CO RS FOR 36 IN rCP TO ( ) = 1=. r :_--. '. _ >`
9. GEOTE)ML.E FABRIC FOR THE 36-INCH OUTLET BARREL JOINTS SHALL BE AMOCO STYLE „ / EL. 323.75
4553 POLYPROPYLENE NON-WOVEN NEEDLE PUNCHED OR ENGINEER APPROVED EQUAL 8E SPACE AT i 5``- '0. SEE I ` ` '
(NON-WOVEN FABRIC) DETAIL SHET SW- }. �OIARS ' I ��� _- f
BE E LACED A`MINIM M�//OF 2 r =- ' ft
� F ��
10.. DRY DETENTION POND EMERGENCY DRAWDOWN IS VIA AN 8"0 PLUG VALVE. THE FEET FRO PI JOINTS.
VALVE SHALL BE A M&H STYLE 820 X-CENTRIC VALVE OR APPROVED EQUAL. THIS VALVE
' f �
- _
IS IN ACCORDANCE WITH AWWA C-504 SEC. 5.5, AND SHALL BE OPERABLE FROM TOP OF / I ( I 1 �, ® _._ .
OUTLET STRUCTURE VIA A HANDWHEEL (SEE DETAIL). THE CONTRACTOR SHALL PROVIDE A I _ { ''
REMOVABLE VALVE WRENCH WITH A HANDWHEEL ON TOP FOR OPERATION OF THE 8*0
r h _ d } {
PLUG VALVE. A CHAIN AND LOCK SHALL ALSO BE PROVIDED FOR SECURING THE WRENCH ' , r I
TO THE TRASH RACK. / / / } I � � I � • � �,-� �> • ,� '; �` ,� �
11. THE 18"0 RCP OUTLET PIPE SHALL BE CAPPED WITH A METAL ORIFICE PLATE. THE ,
PLATE SHALL BE 24"x24"x1/2" (GALVANIZED) AND SHALL HAVE A 6-0 ORIFICE AT THE / / �� � � f � ' { }� � //
BOTTOM. PLEASE REFER TO DETAIL SHEET SW-4C FOR ADDITIONAL INFORMATION.
v EMBANKMENT
C 41 LF - 3" CAST-IN-PLACE CONCRETE
N UP STUBBED ABOVE GRADE
UP ELEV. = 323.50 )
g CHANNEL SHALL BE LINED WITH i
IL ENDWALL � ~ ~. LANDLOK TURF REINFORCEMENT
MATTING 450 AND SEEDED PER 3 FEET OF 3" LAYER OF #57 .STONE
SEEDING SCHEDULE (SEE LINING 'LOOS
15" O-RING RCP
I ANCHOR DETAILS SHEET SW-5) NATURAL GRADE = EL 323.25 '
o INVERT OUT EL 323.75
N 6'
04
���lk•�tQR�tiNP��`�
SEEDBED PREPARATION TEMPORARY SEEDING SCHEDULE PERMANENT SEEDING SCHEDULE
v12" I_I 1 6" (TYP) 1.) CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF
<. 1
0 _ _ 12 _ AVAILABLE. SEEDING DATE SEEDING MIXTURE APPLICATION RATE SEEDING DATE SEEDING MIXTURE APPLICATION RATE
a I 1 I ) I 2.) RIP THE ENTIRE AREA TO 6 INCHES DEPTH.
3 (-I ( I ( I I JAN 1 - MAY 1 RYE (GRAIN) 120 LBS/AC AUG 25 - OCT. (BEST) TALL FESCUE 200 LBS/AC
o I i I' 3 '1 3.) REMOVE ALL LOSE ROCK, ROOTS, AND OTHER OBSTRUCTIONS LEAVING SURFACE REASONABLY SMOOTH GRAPHIC SCALE
ELEV. = 322.75 CAST-IN- CE CONCRETE AND UNIFORM. KOBE LESPEDEZA 50 LBS/AC FEB. - APR 15 (POSSIBLE)
tO '' III-III- 30 0 15 30 60
UNDISTURBED EARTi� I �" ' 1 1 1 1 - I I 4.) AP)LY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL (SEE MAY 1 - AUG 15 GERMAN MILLET 40 LBS/AC SOIL AMENDMENTS
u (-) I I-III-I I ( AUG 15 - DEC 30 RYE (GRAIN) 120 LBS/AC APPLY LIME AND FER71UZER ACCORDING TO SOIL TESTS, OR APPLY 4000 LB/ACRE
-; :'`;'":r•, 5.) CONTINUE TILLAGE UNTIL AWELL-PULVERIZED, FIRM REASONABLY UNIFORM SEEDBED IS PREPARED 4 TO
�- 6>NCHES DEEP. SOIL AMENDMENTS GROUND AGRICULTURAL LIMESTONE AND 1000 LB/ACRE 10-10-10 FERTILIZER. 1 inch = 30 ft.
GENERAL NOTES: EINFORCED CONCRETE FOOTING 6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LB/AC GROUND MULCH
1. LP OF LEVEL SPREADER TO BE COMPLETELY LEVEL AT I -I 7.) MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. AGRICULTURE LIMESTONE AND 750 LB AC 10-10-10 FERTILIZER FROM AUG
ELEV. 323.50 TO ENSURE UNIFORM SPREADING OF FLOW. I I- 12 I I ( I- I I- B. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS WITHIN THE PLANTING / ( APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING,
O - ( ) 15 - DEC 30. INCREASE 10-10-14 FERTILIZER TO 1000 LB/AC). 0R A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN p
c ANY PORTION OF UP FOUND TO BE NOT LEVEL WILL BE SEASON, IF POSSIBLE. IF STAND SHOULD BE OVER 60% DAMAGED, REESTABLISH FOLLOWING ORIGINAL LIME, BE USED AS A MULCH ANCHORING TOOL. 07-S 1 -®3
REJECTED AND WILL BE REBUILT, AT CONTRACTOR EXPENSE. FERTILIZER AND SEEDING RATES. SEED LIGHTLY WITH SEEDING EQUIPMENT OR CULTIPACK AFTER SEEDING. MUL ) - ® �
9.) CONSULT CONSERVATION INSPECTOR ON MAINTENANCE TREATMENT AND FERTILIZATION AFTER PERMANENT APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, APPROVED
{ I�
U COVER IS ESTABLISHED. OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN MAINTIENANC
2. LEVEL SPREADER SHOULD BE CONSTRUCTED ON TOWN OF CARY PROTECT No.
m CROSS-SECTION BE USED AS A MULCH ANCHORING TOOL. INSPECT AND REPAIR MULCH FREQUENTLY. REFERTILIZE IN LATE WINTER OF THE SRF-05000
.3 UNDISTURBED SOIL, AND NOT ON FILL * See seasonal application schedule FOLLOWING YEAR; USE SOIL TESTS OR APPLY 150 LB/ACRE 10-10-10. MOW
MAINTENANC REGULARLY TO A HEIGHT OF 2-4 INCHES. FILENAME:SRF-05000-PD
0 3. THE TRIANGULAR CHANNEL SHOULD BE CONSTRUCTED ON 6. REFER TO SHEET SW-5 FOR FURTHER DETAILS. JAN 1 - AUG 15: REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE.
o A ZERO PERCENT GRADE. RESEED, REFERTILIZE, AND MULCH IMMEDIATELY NURSE PLANTS Approved by Date DESIGNED BY: JCp
7. ALTERNATE CONSTRUCTION OPTIONS FOR THE LEVEL FOLLOWING EROSION OR OTHER DAMAGE. BETWEEN MAY 1 AND AUG. 15, ADD 15 LB/ACRE SUDANGW.SS OR 10 LB/ACRE Planning Date
-
2 4. THE TRIANGULAR CHANNEL SHOULD BE LINED WITH SPREADER CAN BE SUBMITTED TO THE DESIGN ENGINEER BY AUG 15 - DEC 30: REPAIR AND REFERTILIZE DAMAGED AREAS IMMEDIATELY. GERMAN MILLET. BEFORE MAY 1, OR AFTER AUG. 15, ADD 40 LB/ACRE RYE (GRAIN). g DRAWN BY: JCD
LANDLOK TURF REINFORCEMENT MATTING 450 OR ENGINEER THE CONTRACTOR FOR REVIEW. ANY ALTERNATE TOP DRESS WITH 50 LB/AC OF NITROGEN IN MARCH. Engineering Date
€
APPROVED EQUIVALENT. THE TRM MATTING SHOULD BE CONSTRUCTION OPTION MUST ENSURE THAT THE LEVEL J W IT IS NECESSARY EXTEND TEMPORARY COVER BEYOND NOTE: PERMANENT SEEDING SCHEDULE IS FOR EXTERIOR SLOPES OF THE SCALE: 1"=30'
UNE 15, OVERSEED WITH 50 LB/AC KOBE LESPEDEZA IN BASIN, TOP OF THE BERM, AND BASIN FLOOR.ANCHORED PER THE DETAILS PROVIDED. THE TRM MATTING SPREADER IS COMPLETELY LEVEL AT TEE LENGTH AND LATE FEBRUARY OR EARLY MARCH. DATE: 09-19-08
SHOULD BE INSTALLED PER MANUFACTURER'S SPECIFICATIONS. ELEVATION SHOWN ON THE DESIGN DRAWINGS AND ENSURES NOTE: USE THE TEMPORARY SEEDING SCHEDULE ONLY WHEN DATE IS NOT ALL CONSTRUCTION SHALL BE IN ACCORDANCE
CD o SHEET FLOW. CORRECT TO USE THE PERMANENT SEEDING SCHEDULE. WITH TOWN OF CARY STANDARDS, SPECIFICATIONS SHEET N0.
c 5. THE 3-INCH LAYER OF #57 STONE SHALL BE UNDERLAIN ®,
9 WITH MIRAFI FILTERWEAVE 400 OR APPROVED EQUIVALENT. AND DETAILS. W
3 A
LL
I L SPREADER DETAILS © _ McADAMS
N.T.S. FINAL DRAWING RELEASED FOR CONSTRUCTION
0
Q.

8mFmw.A, TER POND CONsmUCITON SPECIFICATIONS
GENERAL N BERM SOIL AM COWAMON SPWMCAPHONS ANTI-SEEP COLLARS (X2)
SEEP COLLARS FOR 36 = �
1. ANY CONFLICTS ON THE PLANS, DRAWINGS, REPORTS, ETC. SHALL BE BROUGHT TO 1. ALL FILL MATERIALS TO BE USED FOR THE DAM EMBANKMENT SHALL BE 0-RING RCP TO BE SPACED
THE DESIGN ENGINEER'S ATTENTION PRIOR TO CONSTRUCTION. AT 15-0 O.C. (SEE DETAIL _
TAKEN FROM BORROW AREAS APPROVED BY THE ON-SITE GEOTECHNICAL �
-- _
ENGINEER. THE FILL MATERIAL SHALL BE FREE FROM ROOTS, STUMPS, WOOD, 50 LF 36"0 0-RING SHEET SW-4C}, COLLARS
2. PRIOR TO CONSTRUCTION, THE ON-SITE GEOTECHNICAL ENGINEER SHALL VERIFY THE STONES GREATER THAN 6", AND FROZEN OR OTHER OBJECTIONABLE RCP (JOINTS WRAPPED SHALL BE PLACED A MINIMU U
MATERIAL. THE FOLLOWING SO
IL TYPES ARE SUITABLE FOR USE AS FILL IN GEOTEXTILE FABRIC
SUITABILITY OF THE PROPOSED BORROW AREA / FILL FOR USE IN THE DAM EMBANKMENT ) OF 2 FEET FROM P = _
/ KEY TRENCH. WITHIN THE DAM EMBANKMENT AND KEY TRENCH: ML AND CL 00.50%. �
3. THE ON GEOTECHNICAL ENGINEER SHALL INSPECT THE KEY TRENCH EXCAVATION 2. FlLL PLACEMENT SHALL NOT EXCEED A MAXIMUM 8" LIFT. EACH LIFT _ _-°-
.. .. °
PRIOR TO PLACEMENT OF ANY BACKFILL WITHIN THE KEY TRENCH. IF THE CONTRACTOR SHALL BE CONTINUOUS FOR THE ENTIRE LENGTH OF EMBANKMENT. BEFORE __ _ -
PLACEMENT OF FILL FOR THE BERM SECTION, ALL UNSUITABLE MATERIAL _ 1
CONSTRUCTS AND COVERS UP THE KEY TRENCH PRIOR TO INSPECTION, THEN THE KEY � � / ���� � �
SHALL BE REMOVED AND THE SURFACE PROPERLY PREPARED FOR FILL
TRENCH SHALL BE UNCOVERED AND TESTED AT THE CONTRACTOR'S EXPENSE. PLACEMENT. _ _ -
4. THE CONTRACTOR SHALL REFER TO THE LANDSCAPE PLAN FOR THE PERMANENT v
3. ALL FILL SOILS USED IN THE EMBANKMENT / KEY TRENCH CONSTRUCTION -�----� ---�"-"- , =� -�� �--""� � _ ,. -,-! ,�--� �T _ � a �
PLANTING PLAN / SCHEDULE. PLEASE NOTE THAT NO TREES / SHRUBS OF ANY TYPE SHALL BE COMPACTED TO AT LEAST 95% OF THE STANDARD PROCTOR
MAY BE PLANTED ON THE PROPOSED DAM EMBANKMENT (FILL AREAS). MAXIMUM DRY DENSITY (ASTM-698). THE FILL SOILS SHALL BE COMPACTED O __
AT A MOISTURE CONTENT WITHIN -1 to +3 PERCENT OF ITS. OPTIMUM _ - _ --
5. IF THE DRY DETENTION POND WILL BE USED AS A SEDIMENT BASIN DURING MOISTURE CONTENT. COMPACTION TESTS SHALL BE PERFORMED BY THE
-- _ F" `
CONSTRUCTION, THE AREA SHALL BE CLEANED OUT (I.E. SEDIMENT, TRASH, ETC) AND _ -- - - -- / __ - _ _ _-_
ON-SITE GEOTECHNICAL ENGINEER DURING CONSTRUCTION TO VERIFY THAT _ _ _- i --
IF NECESSARY) PRIOR TO USE AS A STORMWATER MANAGEMENT FACILITY. - - `-
REVEGETATED ( E ) THE PROPER COMPACTION LEVEL HAS BEEN REACHED. THE FILL SHOULD BE __ ---- 6__ __ p�, C ® a
THIS INCLUDES THE REMOVAL OF ANY SKIMMER DEVICE USED DURING EROSION CONTROL P F T MPA OR. IN ORDER TO PREVENT ---- \ _ r- "� - - \ E- �' kO
COMPACTED USING A SHEE S 00 TYPE CO CT - -
THE TRASH AND SEDIMENT SHOULD BE DISPOSED OF PROPERLY (I.E. - LANDFILL). DAMAGE TO THE.PIPE, NO COMPACTION EQUIPMENT
SHALL CROSS ANY PIPE --- _ -- ,~x / / / w AB
UNTIL MINIMUM COVER IS ESTABLISHED ALONG THE '�
6. THE RISER AND BARREL STRUCTURES MUST BE ON SITE BEFORE A GRADING PERMIT IS - ----� / \ / " VELOCITY DISSIPATOR W
ISSUED. 4. A KEY TRENCH SHALL BE PROVIDED BENEATH ALL FILL AREAS OF THE _- - '� / / NCDOT CLASS 1 'B' RIP RAP Z W
BERM. THE TRENCH SHALL EXTEND A MINIMUM OF 5 FT BELOW EXISTING _ - ,
7. A GRADING PERMIT GRADE AND SHALL HAVE A MINIMUM BOTTOM WIDTH OF 5 FEET. THE KEY WILL NOT BE ISSUED UNTIL THE TOWN OF CARY HAS RECEIVED y - -'L X 21'W X 22" THICK
E� �--�`` _ / Z w
NOTIFICATION FROM THE ECOSYSTEM ENHANCEMENT PROGRAM THAT A RECEIPT HAS BEEN _ J i --q' E DETAIL SHEET SW-4C)
TRENCH SIDESLOPES SHALL BE A MINIMUM OF 1:1 (H:V). THE KEY TRENCH _ - W t�; a�
ISSUED TO THE DEVELOPER AND THE LOCAL GOVERNMENT STATING THE NITROGEN SHALL BE COMPACTED TO THE SAME SPECIFICATION LISTED IN ITEM 2 ABOVE. "' = `�` --- _ - - '
BUYDOWN HAS BEEN COMPLETED. p
5. UPON REQUEST, THE CONTRACTOR SHALL PROVIDE THE ENGINEER WITH -T '
8. THE PROJECT WILL MEET ALL OF THE REQUIREMENTS RELATIVE TO BEST MANAGEMENT \ -- _ I ' /
en et.
REPORTS TO VERIFY THAT THE DAM EMBANKMENT MEETS THE SPECIFIED. -��` ---�_' _ v.„y--'-""' � ® j 1 ®o`® CAR 's
PRACTICES AND ENGINEERED STORMWATER CONTROL STRUCTURES AS OUTLINED IN THE COMPACTION REQUIREMENTS. COMPACTION REPORTS WILL BE NEEDED DURING I ® � �^•°'• ®®
TOWN OF CARY UNIFIED DEVELOPMENT ORDINANCE. THE AS-BUILT CERTIFICATION PROCESS FOR THIS STORMWATER FACILITY. \ / ® °""� ;�O •9
THEREFORE, IT IS THE CONTRACTOR'S RESPONSIBILITY TO ENSURE - ;' ;Q
COMPACTION TESTS ARE PROPERLY PERFORMED DURING CONSTRUCTION. 18" FES INVERT OUT = 19.75 }_` ENDWALL PER NCDOT 9
CONSTRU ON P N `��'� _ / / 11
FILL, THE AREAS ON WHICH FlLL IS A PIPE SUBGRADE SUPIPORT _ -� - INV. OUT STD. 838.80 " ,.,y ` •.�;I N �;
1. PRIOR TO PLACEMENT OF THE NEW LL, \ - ® EL 319.7536 RCP) _ , •m•OeO•.• ®®q
TO BE PLACED SHALL BE CLEARED AND STRIPPED OF TOPSOIL., TREES, �►w �
ROOTS, VEGETATION, AND OTHER OBJECTIONABLE MATERIAL THE AREAS ON BEDDING SPECIFICATIONS
WHICH FILL IS TO BE PLACED SHALL BE SCARIFIED. p N o e
2. ANY REMOVED TOPSOIL SHALL BE STOCKPILED FOR USE IN PLANTING 1. FILL IN THE AREA OF THE SPILLWAY PIPE AND ADJACENT AREAS SHOULD
SEEDING ON THE DAM EMBANKMENT ONCE FINAL GRADES (AS SHOWN ON BE BROUGHT UP TO A POINT OF 2' TO 3' OR MORE ABOVE THE TOP \ / ,� N © g
(SEEDING) ELEVATION OF THE PIPE IN ADVANCE OF SPILLWAY CONSTRUCTION SO THAT i 36.0 LEVEL ` W
THE GRADING PLAN) HAVE BEEN ESTABLISHED WITH COMPACTED FILL. THE SPILLWAY PIPE CAN BE INSTALLED IN A TRENCH CONDITION. ONCE THE / f o �_ SPREADER ' z
INSTALL, OPERATE, AND MAINTAIN ANY FILL IS BROUGHT UP TO ABOVE THE TOP OF PIPE, THE PIPE TRENCH - N a
3. THE CONTRACTOR SHALL FURNISH, N �t EL. 319.50
PUMPING EQUIPMENT, ETC. NEEDED FOR REMOVAL OF WATER FROM VARIOUS SHOULD THEN BE EXCAVATED FOR INSTALLATION OF THE PIPE. ' NUj
PUMPING / M SHEET SW 4A) ' z
(SEE DETAI
PARTS OF THE STORMWATER POND SITE. Tr IS ANTICIPATED THAT PU 2. IF SEEPAGE OR FLOW OCCURS IN OR ALONG THE PIPE ALIGNMENTS, t IN FLOOD PLAIN 2
WILL BE NECESSARY IN THE EXCAVATION AREAS (I.E. - KEY TRENCH). GROUNDWATER CONTROL WILL BE NECESSARY. THIS COULD INVOLVE ) ) �t:=.
DURING PLACEMENT OF FILL WITHIN THE KEY TRENCH (OR OTHER AREAS AS PUMPING (OR STREAM DIVERSION, ETC.) DEPENDING ON THE TOPOGRAPHY. PR RISER TR R / / \ POND FLOOR 3.1 ( �
NECESSARY), THE CONTRACTOR SHALL KEEP THE WATER LEVEL BELOW THE SINCE IT IS NECESSARY TO WORK IN A DRY CONDITION, THIS SITUATION r�
BOTTOM OF THE EXCAVATION. THE MANNER IN WHICH THE WATER IS MAY REQUIRE USE OF LEAN CONCRETE BAi,KFILL, FLOWABLE FILL, ETC. TO SHAPE = CIRC,UTAR SHALL I SL E50 LF
I P INSIDE DIAMETER = 6 FT. / / � i.00� MINIMU ® 0.50% "� RCP '� ' o N
REMOVED SHALL BE SUCH THAT THE EXCAVATION BOTTOM AND S DESLO ES ESTABLISH SUBGRADE CONDITIONS SUITABLE FOR SOIL TYPE BACKFILL RISER Z�ESTTAME ELEVATION = 324.50 / / / 0�-� , ® `
ARE STABLE. PLACEMENT. / it 9
/ INVERT IN (6"0 ORIFICE) = 321.70 / / , ' r , o
3. PRIOR TO INSTALLATION, SUBGRADE CONDITIONS ALONG THE SPILLWAY / /INVERT OUT (36"0 0-RING RCP) T 320.00 / / / N o
® U S�PW TIO PIPE SHOULD BE EVALUATED BY THE ON-SITE GEOTECHNICAL ENGINEER TO T P F = 326.0 }3. O o 0
„ ASSESS WHETHER SUITABLE BEARING CONDITIONS EXIST AT THE SUBGRADE / / / / o 0
1. THE 36 RCP OUTLET BARREL SHALL BE CLASS III RCP, MODIFIED BELL AND SPIGOT, LEVEL SHOULD SOFT OR OTHERWISE UNSUITABLE CONDITIONS BE / / / 1 IDE MIN.)
MEETING THE REQUIREMENTS OF ASTM C76-LATEST. THE PIPE SHALL HAVE CONFINED ENCOUNTERED ALONG THE PIPE ALIGNMENT, THESE MATERIALS SHOULD BE
0-RING RUBBER GASKET JOINTS MEETING ASTM C-443-LATEST. THE PIPE JOINTS SHALL
BE TYPE R-4. UNDERCUT AS DIRECTED BY THE GEOTECHNICAL ENGINEER. THE UNDERCUT / / / / . ® a Al
MATERIALS SHALL BE REPLACED WITH ADEQUATELY COMPACTED STRUCTURAL / / I/ f
2. THE STRUCTURAL DESIGN FOR THE 6-FT. (INTERNAL DIAMETER) RISER STRUCTURE WITH FILL, LEAN CONCRETE OR FI_OWABLE FILL AS DIRECTED BY THE ON-BYTE / \r
EXTENDED BASE SHALL BE BY OTHERS. PRIOR TO ORDERING THE STRUCTURE, THE GEOTECHNICAL ENGINEER.
CONTRACTOR SHALL PROVIDE THE ENGINEER WITH SHOP DRAWINGS, SEALED BY AN P.E. / \ ♦-___` �r ANTI-SEEP COLLARS (X2) SEEP
4. FILL MATERIAL ADJACENT TO THE 36"0 O-RING OUTLET BARREL SHALL � r '~ S FOR 18"0 O-RING RCP TO
REGISTERED IN NORTH CAROLINA, FOR REVIEW. MEET THE SPECIFICATIONS LISTED IN ITEMS 1 THROUGH 3 ABOVE. THE s / / \ �_ '° "
CONTRACTOR SHALL PAY SPECIAL ATTENTION TO THE COMPACTION EFFORTS / `_ BE SPACED AT 15-0 O.C. (SEE A
i DETAIL StHM SW-4C COLLARS
3. THE RISER OUTLET STRUCTURE SHALL BE PROVIDED WITH STEPS 16" ON CENTER. ALONG THE PIPE TO ENSURE THAT ALL SPACES UNDER AND ADJACENT TO )' w
STEPS SHALL BE PROVIDED ON THE INNER WALLS OF THE RISER BOX. STEPS SHALL BE THE PIPE ARE FILLED WITH PROPERLY COMPACTED MATERIAL / 3: I �`_ t° SHALL BE PLACEkA MINIMUM OF 2 � D-
IN ACCORDANCE WITH NCDOT STD. 840.66. PLEASE REFER TO SHEET SW-4C FOR ORIFICE HEAf�WALL (SEE DETAIL �EET SW-4C) __ ' jFEET FROM PIPE JOI
LOCATION OF THE RISER STEPS. 6" ORIFlCFI INVERT = 320.00
4. THE 10'Lx10'Wx3O" THICK CONCRETE ANTI-FLOTATION BLOCK SHALL PRECAST AS THE / N t#® iNI/ 2 !_ O Q ° vr� o
EXTENDED BASE OF THE RISER BOX DURING FABRICATION. THE PRECAST BASE SHALL BE 1. TESTING OF THE NEW FILL MATERIALS SHALL BE PERFORMED TO VERIFY / / /
INCLUDED AS PART OF THE SHOP DRAWINGS THAT WILL BE SUBMITTED TO THE ENGINEER THAT THE RECOMMENDED LEVEL OF COMPACTION IS ACHIEVED DURING / £
CONSTRUCTION. THEREFORE, ONE DENSITY TEST SHALL BE PERFORMED FOR }® {® ` f ® �
FOR REVIEW (SEE ITEM 2 ABOVE).
EVERY 2,500 SQUARE FEET OF AREA FOR EVERY LIFT OF FILL f _Nlr
5. THE RISER STRUCTURE JOINT DESIGN SHALL CONFORM TO ASTM C-478. THE JOINTS
M / / = f_ f ®_
SHALL BE SEALED USING BUTYL RUBBER SEALANT CONFORMING TO ASTM-990. THE 2. TESTING WILL BE REQUIRED ALONG THE 36" 0-RING OUTLET BARREL AT / 3 r7 / V hF ±`~'-F' _° ♦�_=j® _{ ♦ U o
CONTRACTOR SHALL PARGE JOINTS ON BOTH THE INSIDE AND OUTSIDE WITH NON-SHRINK A FREQUENCY OF ONE TEST PER 25 LF OF PIPE PER VERTICAL FOOT OF / / / _` `` i ` f °h,
. ' =_ z
GROUT. FILL W w
` - ♦ ♦ - CQ
6. THE PRECAST RISER STRUCTURE SHALL HAVE A SHIPPING WEIGHT OF 43,650 LBS. THESTA'MMENT ®FPONSIBILrr / ` }#
STRUCTURE WEIGHT SHALL BE THE SHIPPING WEIGHT AND SHALL BE DETERMINED BY / / / \ `\ ~ kr {
SUBTRACTING THE WEIGHT OF THE FACTORY BLOCKOUTS FROM THE GROSS STRUCTURE ALL REQUIRED MAINTENANCE AND INSPECTIONS OF THIS FACILITY SHALL BE :{> `_ !h ,.f t ®.;'
n;
WEIGHT. THIS INFORMATION SHALL BE SHOWN ON THE SHOP DRAWINGS SUBMITTED TO THE THE RESPONSIBILITY OF THE PROPERTY OWNERS ASSOCIATION, PER THEZ = °•,_` 1Z /
ENGINEER FOR REVIEW.
EXECUTED OPERATION AND MAINTENANCE AGREEMENT FOR THIS FACILITY. e f``~ - - -{ ' '
\ , a __=_
/ �_f'tf __-_- f� _ _ ' •• j� -_ � III
7. PRIOR TO ORDERING, THE CONTRACTOR SHALL SUBMIT TRASH RACK SHOP DRAWINGS 1 ji +,y/ f ;- 1,- ice•
TO THE ENGINEER FOR REVIEW. CONTRACTOR SHALL ENSURE THAT AN ACCESS HATCH IS J I „{ - /
PROVIDED WITHIN THE TRASH RACK (SEE DETAIL FOR LOCATION) THAT WILL ALLOW FOR / // %-' {f
FUTURE MAINTENANCE ACCESS. CONTRACTOR SHALL ALSO PROVIDE A CHAIN AND LOCK ` ' r`` '`' ' `` F
FOR SECURING THE ACCESS HATCH.
8. ALL POURED CONCRETE SHALL BE MINIMUM 3000 PSI (28 DAY) UNLESS OTHERWISE / / N 00
/ - r t ♦ J
NOTED. / £ __- �=}'
7
9. GEOTEXTILE FABRIC FOR THE 36-INCH OUTLET BARREL JOINTS SHALL BE AMOCO STYLE
4553 POLYPROPYLENE NON-WOVEN NEEDLE PUNCHED OR ENGINEER APPROVED EQUAL _ ' Now
(NON-WOVEN FABRIC) / / / / { h_= ~ y ` £� - ' / ..• 0100
10. DRY DETENTION POND EMERGENCY DRAWDOWN IS VIA AN 8"0 PLUG VALVE. THE A�rlzllll
/ / \�
VALVE SHALL BE A M&H STYLE 820 X-CENTRIC VALVE OR APPROVED EQUAL THIS VALVE
IS IN ACCORDANCE WITH AWWA C-504 SEC. 5.5 AND SHALL BE OPERABLE FROM TOP OF
OUTLET STRUCTURE VIA A HANDWHEEL (SEE DETAIL). THE CONTRACTOR SHALL PROVIDE A / / rye~ ♦
REMOVABLE VALVE WRENCH WITH A HANDWHEEL ON TOP FOR OPERATION OF THE 8 0 --
PLUG. VALVE. A CHAIN AND LOCK SHAD_ ALSO BE PROVIDED FOR SECURING THE WRENCH
TO THE TRASH RACK. AVI
11. THE 18*0 RCP OUTLET PIPE SHALL BE CAPPED WITH A METAL ORIFICE PLATE. THE / }
PLATE SHALL BE 24"x24"x1 2" GALVANIZED AND SHALL HAVE A 6"0 ORIFICE AT THE }\�� /
BOTTOM. PLEASE REFER TO DETAIL SHEET SW-4C FOR ADDITIONAL INFORMATION. /
EMBANKMENT
r 36 LF - 3" CAST-IN-PLACE CONCRETE
LIP STUBBED ABOVE GRADE
CHANNEL SHALL BE LINED WITH
UP ELEV. = 319.50
�d ENDWALL LANDLOK TURF REINFORCEMENT
LO j+ MATTING 450 AND SEEDED PER 0 01
uwi
\_' I I SEEDING SCHEDULE (SEE LINING 3 FEET OF 3 LAYER OF #57 STONE ,
r 15" 0-RING RCP j ANCHOR DETAILS SHEET SW-5) NATURAL GRADE = EL 319.25 �'E6 2 4 2009
o iNVERT OUT EL 319.75
N I#401 6' OENR-WATER WAUTY
_ _ SEEDBED PREPARATION D�AN4S�O�IA���
TEMPORARY SEEDING SCHEDULE PERMANENT SEEDING SCHEDULE
12" I I 1 12 '+' •' 6" (�) I I (-I I ( I I ( I I I 11.��CBHIISEEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF
_ SEEDING DATE SEEDING MIXTURE APPLICATION RATE SEEDING DATE SEEDING MIXTURE APPLICATION RATE
.� 1''•.
CL I 1 2.) RIP THE ENTIRE AREA TO 6 INCHES DEPTH.
I I 3 I ( � III-I I (-) I I JAN 1 - MAY 1 RYE (GRAIN) 120 LBS/AC AUG 25 - OCT. (BEST) -TAU_ FESCUE 200 LBS/AC �
o I. .'s�" -i 3.) REMOVE ALL LOSE ROCK, ROOTS, AND OTHER OBSTRUCTIONS LEAVING SURFACE REASONABLY SMOOTH GRAPHIC SCALE
ELEV. = 318.75 3 CAST-IN- CE CONCRETE AND UNIFORM. KOBE LESPEDEZA 50 LBS/AC FEB. - APR 15 (POSSIBLE) g
30 0 15 30 60
4.) APPLY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL (SEE MAY 1 - AUG 15 GERMAN MILLET" 40 LBS/AC SOIL AMENDMENTS I
LL UNDISTURBED EARTF� BELOW-). (GRAIN) / APPLY LIME AND FERTILIZER ACCORDING TO SOIL TESTS, OR APPLY 4000 LB ACRE
L ,., I-III III-I ) I AUG 15 - DEC 30 RYE GRAIN 120 LBS AC
- - 5.) CONTINUE TILLAGE UNTIL A WELL-PULVERIZED, FIRM REASONABLY UNIFORM SEEDBED IS PREPARED 4 TO /
-III-I •, ` ' I I i-I I I-I i ' 6 INCHES DEEP. SOIL AMENDMENTS GROUND AGRICULTURAL LIMESTONE AND 1000 LB/ACRE 10-10-10 FERTILIZER. 1 inch = 30 ft°
GENERAL NOTES: - EINFORCED CONCRETE FOOTING 6.) SEED ON A FRESHLY PREPARED SEEDBED AND COVER FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LB/AC GROUND MULCH
(1. UP OF LEVEL SPREADER TO BE COMPLETELY LEVEL AT „ 7.) MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH. AGRICULTURE LIMESTONE AND 750 LB/AC 10-10-10 FERTILIZER ( FROM AUG
o ELEV. = 319.50 TO ENSURE UNIFORM SPREADING OF FLOW. I (- 12 I III ( '-"-I 8.) INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS WITHIN THE PLANTING APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING,
15 - DEC 30, INCREASE 10-10-10 FERTILIZER TO 1000 LB/AC). OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN ®�e S P ®�
ANY PORTION OF UP FOUND TO BE NOT LEVEL WILL BE SEASON, IF POSSIBLE. STAND SHOULD BE OVER 60 DAMAGED, REESTABLISH FOLLOWING ORIGINAL LIME,
REJECTED AND WILL BE REBUILT, AT CONTRACTOR EXPENSE. FERTILIZER AND SEEDINGG RATES. SEED LIGHTLY WITH SEE EDING EQUIPMENT OR CULTIPACK AFTER SEEDING. MULCH BE USED AS A MULCH ANCHORING TOOL
9.) CONSULT CONSERVATION INSPECTOR ON MAINTENANCE TREATMENT AND FERTILIZATION AFTER PERMANENT APPLY 4000 LB/AC STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, APPROVED
�? COVER IS ESTABLISHED. OR A MULCH ANCHORING TOOL. A DISK WITH BLADES SET NEARLY STRAIGHT CAN MAI
2. LEVEL SPREADER SHOULD BE CONSTRUCTED ON CROSS-SECTION BE USED AS A MULCH ANCHORING TOOL. INSPECT AND REPAIR MULCH FREQUENTLY. REFEFTILIZE IN LATE WINTER OF THE �/��n' (�e CAR R PROJECT NO- SRF-05000
UNDISTURBED SOIL, AND NOT ON FILLuainrrF_Natur.F_
LL * See seasonal application schedule FOLLOWING YEAR; USE SOIL TESTS OR APPLY 150 LB/ACRE 10-10-10. MOW TO••,• OF Y
3
REGULARLY TO A HEIGHT OF 2-4 INCHES. Ft►.FNAw'SRF-O5000_PD
0 3. THE TRIANGULAR CHANNEL SHOULD BE CONSTRUCTED ON 6. REFER TO SHEET SW-5 FOR FURTHER DETAILS. JAN 1 - AUG 15: REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE.
o A ZERO PERCENT GRADE. RESEED, REFERTILIZE, AND MULCH IMMEDIATELY NURSE PLANTS Approved by Date DESIGNED BY: JCD
7. ALTERNATE CONSTRUCTION OPTIONS FOR THE LEVEL FOLLOWING EROSION OR OTHER DAMAGE. Planning Date
BETWEEN MAY 1 AND AUG. 15, ADD 15 LB/ACRE SUDANGRASS OR 10 LB/ACRE
2 4. THE TRIANGULAR CHANNEL SHOULD BE LINED WITH SPREADER CAN BE SUBMITTED TO THE DESIGN ENGINEER BY GERMAN MILLET. BEFORE MAY 1, OR AFTER AUG. 15, ADD 40 L )•B ACRE RYE (GRAIN g DRAWN BY:
AUG 15 - DEC 30: REPAIR AND REFERTILIZE DAMAGED AREAS IMMEDIATELY. / JCD
LANDLOK TURF REINFORCEMENT MATTING 450 OR ENGINEER THE CONTRACTOR FOR REVIEW. ANY ALTERNATE TOP DRESS WITH 50 LB/AC OF NITROGEN IN MARCH. Engineering Date
-
0 APPROVED RF REINFO THE TRM MATTING SHOULD BE CONSTRUCTION OPTION MUST ENSURE THAT THE LEVEL. IF IT IS NECESSARY TO EXTEND TEMPORARY COVER BEYOND NOTE: PERMANENT SEEDING SCHEDULE IS FOR EXTERIOR SLOPES OF THE SCALE: 1"-30'
JUNE 15, OVERSEED WITH 50 LB/AC KOBE LESPEDEZA IN BASIN, TOP OF THE BERM, AND BASIN FLOOR.
ANCHORED PER THE DETAILS PROVIDED. THE TRM MATTING SPREADER IS COMPLETELY LEVEL AT TEE LENGTH AND LATE FEBRUARY OR EARLY MARCH. DATE: 09-19-08
9 SHOULD BE INSTALLED PER MANUFACTURER'S SPECIFICATIONS. ELEVATION SHOWN ON THE DESIGN DRAWINGS AND ENSURES NOTE: USE THE TEMPORARY SEEDING SCHEDULE ONLY WHEN DATE IS NOT ALL CONSTRUCTION SHALL BE IN ACCORDANCE
5. THE 3-INCH LAYER OF #57 STONE SHALL BE UNDERLAIN SHEET FLOW. CORRECT TO USE THE PERMANENT SEEDING SCHEDULE.LO WITH TOWN OF CARP STANDARDS, SPECIFICATIONS sHEET NO.
9 WITH MIRAFI FILTERWEAVE 400 OR APPROVED EQUIVALENT. AND DETAILS. tiW-4A
x
LEVEL SPREADER DETAILS A 1V�cADAS
� N.T.S. FINAL DRAWING - RELEASED FOR CONSTRUCTION
U
N