HomeMy WebLinkAboutWPO201000057 Plan - As-built 2021-05-27--- - - NO
TRASH RACKS HAVE BEEN INSTALLED ON ALL
Trash Rack Prot,-tion for Low Flow Orifice / ORIFICES IN ACCORDANCE w/ THE DETAILS IH QF
fSHOWN ON THIS SHEET.
I /
/ EXISTING
/ ACSA ESMT.
w __ w
WELD (TYP.) f - / w w _- w
/ 030" CL. III RCP
MOOT STD. EW-1 w OUTLET PROTECDON.
/ VDOT CLASS ll, EC-1 RIPRAP w/ 92.0' LF. 7.88%
/ / l l l / / / \ \ t GE07EX77LE FABRIC UNDERLAYMENT, INV.=5B-,EOBr 501.26'
2' x 11A" STEEL � \
a r srocKALLAtiOUNa / %W1=7.5; W2=12.5, L=10; D=2.5' (MIN.) INV.OUT=494� 494.01' 4' WIDE
\ \yam,
N, y� \ FOREBAY TOP
OF DAM ELEV=
1!2'01APAET8RHOLE6 /_ \ s� "off\ \\ \ \ \ \ �\ ; 509.5,
t 3 LO+FT2 EXPANDED STEEL. B
'
GRATE ON TOP, BOFTOM,
AND f"OES
_ - -
-77
44ElD 1"x1"xil.g,..4MGLE / / .. j / N, N,
1�
v OVER ALL EDGES MIR) I I-� , -
/
N. 40 WIDE RIPRAP
\ \ \ \ ?€ T , i i. LINED EMERGENCY
\\.\\\\ \00S.; yf,y>i ,r/.'_- SPILLWAY CREST
I \ r-
\ e\> \ \ \ , \ \ \ \ - r „i.✓ f - 1 _ ELEV.--514 55 514.59'
NOTES FOR TRASH RACK / j \ \� 1 I III \ AV \ r \ VAA o. N, A \ A V A \ V 1.- 80
d.TRASH RAC K TO 6E: GENTEFiE4 OVER OPENING. �. 1 ' l 1 ' \\ \ \ ¢ \ \ \ \ \ 2''_VW1 „-
2. STEEL TO CONFORM TO ASTM A-n '� I
3. ALL SURFACES TO BE COA'BJ:D wIt^,H ?RC COL$ &"iALVAb111ZING l (( 4' WIIDJ�,' FO Y ,`/ + 1 1 \.. \\ \\ \�.�me..r .. \ \-r-`�
TOP OF AM E �. 1 1 \ \ " a \
ODWOUND AFTER WELDING. ' - I SHALL E S �f 1�iG QR Irt ` I \\\ \� \ \•g>`p; \ \\ \\ \, \ \ J , rJ
d.7RAiN RAGK70 6E PASPENE@J TO TtIE R95ER W 9TH 1/2" C MWS . DAMI�j ,GL BE I \ \\\\ \ \c �\ -. 6��,P,A `�'^' \ �''?�;r;��-, `IS It `,
MA69NRYAN6Hs1R^a. 1'riASN RAC14TU9EfREMfdVA6LE. ONS7�,RC{CTEl� O�F. w. I{D I \ \\ \\ t .,\ \ \ y 1 r as -k , � TMP i-15C
GABIdN BASXEIT F L I I I I \\\\ \ \ \ I, t Yr., x i \ \ \ \ 9
DETAIL (NTS) AVINITY ESTATES,LLC
�r
TRASH ItACK D� ,'i, >,k
520
I
I
51358'
520
-6a cP-A4Uj,-TI=STA
RIS
10
YEAR
i ELEV.r
FI
�5"
10' 11
DE TOP
OF DAM
W.S.E,=
14.97' i
LOW FLPW
ORIFCES
A
ELEV.
ELEV.
51F1516.02'
10
YEAR
10.06'
S.E=5
4.25
+COF!
STCS
MRAX-
--
--
-
4O`
E-77/PR
I
TRAS
RACK
LINED
EMERGECY
2
YEAR
SPILLWAY
AT
LEV.=
515
515
.s E=
2.2s'
514.59'
ASBUILT
w
GRADE
!
MAX
MBANK
SENT
__
___
ORIFIC
COEF
.= 0.6
510
MWSE-1stsO
5
0.06'
510
1
0' WIDE
UA77
^j
SAF
BENCH
}.
- --
--
TTOM
?P UlFEI504
2
IA
IIR6ED�cM2V
----
---
l
)j
505
WO
PROM
EI ,
4
160 qr
505
BOTTCW
OF RE
TEN
BA
WELEV.
503.
'20'
500
i
''' °
500
M1N. 8
WiDE
7OP 6
12' D
EP IMP
Rl,O�J `'
COrcE
l
2
CU 0
T TRENCH
41l1-1{
1.7 M
X Sl0r
JLOL''f.
SiE
VDOT
STD. E
-1
DETAIL
)N THIS
SFI1 e %
FOR ATJ
)lTIONAI
INFOA',
PONI.
6'1i1
yEEPC
JCRE7E
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-
R (4)
k6'S
EL
BA
E w/ M
SER EL}�EDDED
fAN77-SEER
COLLA
S495
6441
INTO CONCRE
(MIN.)
3o"
LIII R
P BAR
L495
92.0' j
25 LF
.88%
INI!
IN=
1.26'
492
IN
, OUT=
49472.5
94.01'
492
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ON
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U No. 35791 �-
10/19/20�4'
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\\ \ -N 60" RCP MULT STAGE
FIGURE 3.01-i„ , 3C7" HDP RISER RIM ELEV-5;.;.5C'st3sa• 0+751+00 1+50 2+00 2+50 3+00 3+50 4+004+2.)
I RISE
I < ?: E 1 - �! _ w/ FIVE EVENLY SPACED
Hpnrogeneo„s Embankments w!S'eepage Controls i' L \ • �.- - /�
\ , 1, �\ \\ \ , I 05" LOW -FLOW ORIFICES o
,� \ \\ \N, N_ ` s . � \ l \ , \ , 1 Ill W/TRASHRA�1&80:- 510.0L6' V w ry `;
\ h rCD
III II INy=509.80 vvwv=r-�ftL vv �, 1� �- RETENTION BASIN DETAIL
I: C`
omogeneous fill
f, PHASE I RETENTION BASIN REQUIREMENTS:
_� 1 \ ; 1 1 TO PREVENT FLOATATION THE RISER BASE AND BARRE /
t I �, 1- ). \ I .S \ I! Phase I: Approved Avinity
_ _ _ _ _ _ , - r l I, CONNECTION SHALL C1 FIRMLY EMBEDDED A INTO A 4" Impervious Area from Approved Avinity I & Avinity I WPO Letter of Revision= 231,625
r I Al' MWSE= ' I I tf }' 1 I I i ` THICK REINFORCED CONCRETE FOUNDA710N THAT IS 155' &
`c I )i �l'• 181 F�P ° ',,� lam] BURIED OUTS/DE THE UM175 OF THE POOLED WATER Water Quality Volume 9,651
�'�Q ^1k'�ut off tench-4�below suitable] I oD I I ll 111l,l'(I, II\I Tl tDSA9�'-sto.os' ��f Water Quality Volume Required 38,604
material ' ,� I I
TYPICAL HOMOGENEOUS '.I 1 1 1 \ 1 l 1 --/1JL//" i . 1) / yLJ (65% Removal= W V X 4)
Ln
EMBANKMENT :: 1 \ \ ' '` 1 \' \I / / / // / Elevation (ft) Q Area Of Wet Pond Volume (Gf) Asbuilt Area Asbuilt Volume .-w
I \ \ \ MIN. WATER QUALITY / / / l / / r (so _-__----- _,(CD -- --
1 \ \ / / Contours s of Wet Pond1`
1 \ \? \ VOLUME (4x) REQ'D=
1 \ \ \ �j \\\� \ 36,604of
Transition till 1 \ \ \ \\ \ WATER QUALITY / / / / / 504 6,560 0 504 5560 0
1 \13 PFk \ \ \ \ \\\ \ VOLUME PROVIDED- / / % t ` / // / // /
ock or grovel ;\ \� \\ \ 4&,-6 4s,t60 cf //%// // // 506 7,049 12,569 506 7,]LO 12,638r,-.� CV
' We out et ". _D�. \ 1 \ \ `�'\�,\`��i, , \ \\� \ / / /_ ,;: / �/ /
Door fi t r \ \ \ j / / / r ` / / / / / / / / 508 8,659 28,250 50$ 8>754 28>474
Perforated collector aroun� s✓oefs Blanket drain %\ \ \ \ ._. �\ "� ~ `M1�L \\� \_ -- - _r �� // x`, ",' /// // / 509 _- 9,503 37,327 509 9,598 37,647 Faundatlon drain °°
\ \ _ _ / / / _ J 06
FOUNDATION GRAIN BLANKET DRAIN\\ ✓-"/ I ® 510 l 13,281 48,667 .t10 13,541 49160 �
_ -
\ !. \ \ * .� ` - _ - / % / / / / / / / 512 15,494 77,413 512 15,669 7M44 y
\ \ - _ / % / / db 10' WIDE GRADED U
\ \ \ \ \ 1n ' - , - , / j / / / / / / EARTHEN SWM ACCESS 514 17,834 110 714 514 17 951 111 938 a
cbr a vm \ \ \\ \ \ \ \ MIp 1 C� �S` s / a
\ \ \ \ \ \ \ \ �` P,¢gf/gTlc 1 / ` i i / % // / / w/ SLOPES <107 TO 516 20,192 148,716 516 20,302 150,167 0 c
saw, g� « rak \ \ \ 'art^ / c < {�/� / 01
\ \ ,\ \ \ \ \ - _ H � - i / i j//� // /// PROVIDE ADDED SAFETY PER APPROVED WPO LETTER OF REVISION: � � o
re« a° drain or gravel - - _ 1 30 i' ✓'//'s �' / j / / BASIN PROFILE ALIGNMENT AVINITY I- POND RISER N o
„_.,,_ e• ,: ,,` ° \ \ \ \ \ \ _~ - '�'j / �' / / / AREA (:LA TO POND=35.37AC. N
\ \` i / / / / / / CENTERLINE OF POND, / SCALE: z"=5' (V) & i"=5o' (H) DRAINAGE ( )
Transition filter \ \ y- - - �i i / / / OUTFALL SMUC7URE, CN TO POND (AVINITY I PHASES 14V) = 61.9
Transition biter ' ' �-
c - - - / / AND EMERGENCY SPILLWAY Tc (UNCHANGED FROM APPROVED) = 0.42 hrs.
CHIMNEY DRAIN TOE DRAIN ° - / /
RISER RIM ELEV.=S '. �'- Sz3.58'
// w/TRASHRACK o
Amended A #1 Watershed Summary
ORIFICES TO BE SPACED o D 2-Y r Flowe ,� N
----- / ea
EVENLY ALONG THE510' z E Pre -Development Post Development �i
° r" HORIZONTAL PLANE F U �l � a
7M PldstlC CJJ)IU1t(Ji1S, Inc... -, ut - t® o
SXDPIl1RaX - w_
.. �. *,r a0 Box 4386. Wnchester, VA Z2600. �--- FIVE 05"ORIFICES r�vJ Ur
Z o
POUND SERIES TRASH li( 2sa Mrc>hee W, Wnrhester, VA 22W3 - - - - - - - -�`
------------------------ w/TRASHRACKS, �V Total= 9.42cfs 4.74cfs IF% a
CONCRETE MANHOLE 1877)877-5727phone INV.=gt"0'-5a.o.o6 w° �
STANDARD 60 INCH RACK SHOWN (540) 722-2219 fax I `o
http,/Avww.plasdc soludon.com ` ,oi ' 030" CL. III RCP INVERT OUT=5o2.ao' Amended CA #1 Watershed Summary
DIMENSIONS IN INCHES ^ - Soz.z6' N
VAR. WIDTH (10-Year Flow) 0
HOPE sTWL vpV PL4XFicaY \ I z C
PweTtaaownONs,ina SWM FACILITY 8c Pre -Development Post -Development
ACCESS EASEMENT
- I Uj
DB.4Bs4, .Sze ra P v
s A\ I I TO PREVENT FLOTATION THE RISER BASE AND BARREL I t"I v'
' -� t N - CONNECTION SHALL BE FIRMLY EMBEDDED 6' INTO A z4" TOta 1= 39.91 cfs 37.20 cfs 1,, v a"., U L o
ouAm�secrw
RENWA„LE WRACCF53 t - - J �-
3 ° THICK REINFORCED CONCRETE FOUNDATION THAT IS a.5'X25' / ry
&BURIED OUTSIDE THE LIMITS OF THE POOLED WATER t N r 4<
,�W a p 9 C N
r ' r 1 JI AVINITY ESTATES LLC �
APPROVED
•; ;,-'-'� ;) 1y..1"'`'t` by the Albemarle County o
Community Development Department tW- z
1, Date 5/27/21
•1 N // I, sy x
l ° File WP0201000057 w
I I_) Ld
PLAN SIDE VIEW ISOMETRIC) z
<. STORMWATER MANAGEMENT NARRATIVE: N
�t Z
D.A. #1A
3.45 cfs
4.74 cfs
D.A. #1 B
5.97 cfs
D.A. #1A
13.37 cfs
37.20 cfs
D.A. #1 B
26.54 cfs
N
N
N
C
Y
N
StormRaxTN Round Series for Concrete Manhole
Part No.
Dim A
Dim B
Dim C
Min ID
Min OD
RS-24
""i
A t
28
24
30
R . 6
21 4
14
4031
36
43
P5+48
27%
is
54
48
57
*60
27
18%
06A
60
70
THE STORMWATER MANAGEMENT RETENTION BASIN FACILITY APPROVED WITHWMIJ
o
WPO-2013-00044 HAS BEEN REVISED WITH THIS AMENDMENT TO ACCOMMODATE A
�-
0
o
5 GRAPHIC SCALE LARGE AMOUNT OF ROCK FOUND DURING EXCAVATION. THE PROPOSED RETENTION
20 0 10 20 40 80
BASIN PROVIDES 4X WATER QUALITY VOLUME IN EXCESS OF REQUIREMENTS. THE
p
a
- WATER QUALITY REQUIREMENT CALCULATION USES THE APPROVED IMPERVIOUS AREA
( IN FEET) FROM AVINITY 1 (22o 75C SF AND THE ADDITIONAL AREA CREATED WITH THE: PHASE IV
)t
NOTE:
1. ALL PROPOSED SLOPES STEEPER THAN3:2
1. ALL FILL TO BE PLACED AT95%COMPACTION-
1 inch = 20 ft. r31"r
TOWNHOML AND ROADWAY REVISIONS (1.1,250 SF), WHICH WERE APPROVED WITH
>
()
o
SHALL HAVE A LOW MAINTENANCE GROUND
2. MINIMUM 3'OFCOVER MUST BEMAINTAINED OVER
�I
COVER FOR STABILIZATION PURPOSES.
W/L&SIL.
SDP-2025-0002.E AND QUANTIFIED IN THE AVINITY I WPO LETTER OF REVISION.
Q
THESE AREAS SHALL NOT BE PLANTED WITH A
3. MINIMUM OF i' OF VERTICAL SEPARATION FROM
_ _U
uJ
a
GRASSCOVERFORSTABILIZATION&SHALL
STORM SEWER & W/L AND i.5'OF SEPARATION
BETWEEN W/L& SANITARY SEWER MUST BE
/� A C (_
AQUATIC BENCH LANDSCAPING
F-
I
y
C'
�:.
BE A GROUND COVER CHOSEN FROM TABLE
PROVIDED.
3.37COFTHE VESCH.
4• ALL ROADWAY EMBANKMENT MATERIAL SHALL
2. ALL DRAINAGE EASEMENTS ARE20'WIDE
CONSIST PREDOMINATELY OF SOIL AND BE PLACED IN
UNLESS OTHERWISE NOTED.
SUCCESSIVE UNIFORM LAYERS NOT MORE THAN 8
-,
INCHES IN THICKNESS BEFORE COMPACTION OVER
;
3. EMBANKMENT TOP OF DAM WIDTH SHALL BE
THE ENTIRE ROADBED AREA IN ACCORDANCE WITH
1o' M I NI M UM
VDOT 2oo7 ROAD AND BRIDGE SPECIFICATION 303.04
5. CONTRACTOR SHALL FIELD VERIFY ALL EXISTING
ELEVATIONS OF STORM SEWER, SANITARY SEWER &
WATER LINE PRIOR TO CONSTRUCTION. NOTIFY THE
ENGINEER OF ANY DISCREPANCIES SO THAT THE
ELEVATIONS OF THE TIE-IN CONNECTIONS CAN BE
ADJUSTED ACCORDINGLY.
r
6. io' OF HORIZONTAL SEPARATION SHALL BE
Abb.
Scientific Name
Common Name
Caliper
Size
10-Year
CanopyC3uantit
Total
Canopy±
Aquatic Bench Landscaping
PV
Peltandravirgnica
Arrow Arum
24
NL
Nuphar luteum
Spatterdock
16
PP
Pond Weed
Potamogeton Pectinatus
30
AH/DP
Arrowhead
Duck Potato
T to 4' o.c.
130
THE PROPO�`D AVINITY II DEVELOPMENT AND APPROVED SDP-2015-00020 AVINITY I w E
PHASE IV PLANS SEPARATE THE AVINITY II DEVELOPMENT FLOW FROM THIS NEW AVINITY
I RETENTION BASIN. ROUTING CALCULATIONS ARE PROVIDED WITH THIS WPO JOB NO.
AMENDMENT WHICH DEMONSTRATE THAT THE PROPOSED RETENTION BASIN POND 0020.3
RELEASES POST -DEVELOPMENT FLOWS LESS THAN THE PRE -DEVELOPMENT CONDITION.
- a
SEE SUMMARY CHART ABOVE. scALr
AS SHOWN S
C
�o
SHEET N0. CL
MAINTAINED BETWEEN THE OUTSIDE OF THE N
SANITARY SEWER AND WATERLINE. RETENTION BASIN TYPE III AQUATIC BENCH PLANTINGS. a,
-� ARROWHEAD/DUCK POTATO PLANTING AREA - � ®f �