HomeMy WebLinkAboutWPO201600054 Plan - As-built 2021-09-22I UKI°IWAI CK MAINAL31=1ICIN I rAUL1I T H- UC IALL kZ:.ALC Ur 1-=.SU_J
1A PPROVD BASIN FjLOOf{
PRE'SERVED SLOPES TO HAIL HA E P SITI E SLOPES f '
REMAIN�NDISTURBED O ���/ / // TO/ORITHr RISll ALL Lg(CAFINS/
/67/ / ARACCESTS & \. /
/M*NiTEN, SEE�MT.
DB�41, 0.669 / / s, \ \ \
\ AMEND D r,e' WIDE VDOT CL.I �// / \ O
RIPR P LINED EMERGENCY
SPILLWAY CREST 424 53' / V A
ELEVATION=tpif.5s'426.0/
(io' TOP OF DAM ELEV. = p� \
p�q
IlErP HWT F6R
y �D �a,
/ 17R'O ELO
P)
� \\ \ \
DE
/ `/ / O �' GRADEb SWMGRAS \ \ \
/ \ \
i .i
( \ / / LINE \ c-�Ss�.T�H \ •. \ \ \ \ i
\ J N
-0+7',/ APPROVED 030" CL. III RCP STANDPIPE w/
TRASHRACKS SHALL SE RISER STRUCTURE
\ \\ \ \ \
STRUCTURE. RISER STRUCTURR E RIM \ \
/� \\
-4234%RI / INVERT )ELLEV.=LO,R LOW
I I I I \ \ QQPR\R�O \ ISER f3AA5E AND-BARR \ J / PPR�VED-0z5"CC III RC 7a\ \ 4 `°3 \ \ \ \ \\ \ \ \
NNi€CYIONH L EFIRN4�Y EMBEDDED / o Lw/VDOT STD. EVJ�(
l \ \�NOt�bATIOff����ii�5' AND BC-OC1�KIE�— v p� ;>< / NV. I";'`-a`��INV_OU� `'�5 9
\B6�0 T L11JIIfi50`PHEB�:SII�RA61N6-
\ O P VEA1T FLOATH�IO _ \ \\
\ \ O ` APPROVED VDOT#3 COARSE AGGREGATE
\ \ \ OUTLET PROTECTION w/ GEOTEXTILE FILTER \ \\
FABRIC UNDERLAYMENT (L-10t,/W-5L. D=2' MIN.) ,
O� 0-
EMBANKMENT NOTES:
AFTER AN INVESTIGATION OF THE SITE's SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY
AND AN EXAMINATION OF VA DEQAPPENDIX A: EARTHEN EMBANKMENT (REQUIREMENTS vs.
RECOMMENDATIONS), THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES
NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY
EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED
BELOW, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT MINIMUM.
THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE
WITH THE DETAILS SHOWN ON THIS SHEET. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING
& THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL
SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON
COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A
MINIMUM OF 95%OF MAXIMUM DRY DENSITY AND 2%OF OPTIMUM MOISTURE CONTENT. ALL FILL
MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT
DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS.
bIUKIvIWAItK MAINA(atMt:NI t-A(,1L11Y15Ut IAIL (J: ,ALt Ur 1"=3U')
VAR. W TH SW \ \ \ \ \ \ \ \ \ \ \ \ \
MAI TN EC NC�NCE E T \ \ \ \ \ \ \ \\ \ \ \
DB.5443; PG.669 \ \ \ \ \ \ \\\ \ S
AMENDED io' WIDE \ \ \ \ \ \ \ \
GRADED SWM GRASS, \ \ \
LINED ACCESS ROAD
APPROVED 030" CL. III RCP �, APPROVED BASIN FLOOR SHALL HAVE J
STAN DPIPE w/ TRASHRACKS SHALL g� POSITIVE SLOPES TO THE RISER's
SERVE AS THE RISER STRUCTURE. tt� LOW -FLOW ORIFICE IN ALL LOCATIONS /
RISER STRUCTURE RIM ELEV.=ge}.9s4o8.oz'^
w/ ONE (1) 02" LOW -FLOW ORIFICE Sir.� \ O+ O>
wy/�INVERT ELEV.= yo,N
//�y
, Y' �VIDTWPOSEDA�GAR.S &
a % ' MAINTENANCES Y / 4ot� — - ,. ' ,'
APPROVED RISER BASE AND BARREL CONNECTION ,,�`� \, I EMERGENCOVED Y S ILL GRASS LINED /
APPRi)VED�iS" CL. III RCP � EMERGENCY SPILLWAY CREST
SHALL BE FIRMLY EMBEDDED 6" INTO A 08.
w VDOT STD. E - 4' �4RREL / �l �,'` - I ELEVATION-qe8-9r?r4 9
REINFORCED 18" THICK CONCRETE FOUNDATION +2�
1 {�9LF%IVV. INV (10' TOP OF DAM ELEV. = 4r1e.ee9
THAT IS 5'x5', AND IS BURIED BELOW THE LIMITS °� —So' OUTr 4a37z I / / / / 4r.0,5
OF THE BASIN GRADING TO PREVENT FLOTATION.!. t�o�.z ti /
APPROVED STORMWATER MANA �NTBA TES: _ I 1- I 9
1. THE REVIEW, PROPOSAL TALLATION OF THE IR �- o APPROVED VDOT#3 COARSE AGGREGATE
\ WALL ARE NOT P F THIS SET OF PLANS. THE RETAINING \ I OUTLET PROTECTION w/ GEOTEXTILE FILTER i yaC
WALL DE ILL BE REVIEWED SEPARATELY. \ I FABRIC UNDERLAYMENT (L=ii`IW a,D=TMIN.)
435
1/2" zinc plated hook
attached with. 3/8' fastener
a ® ®®
®® 2-1/8" dla. holes
a ®0®m ® .
1sorTlctric
.��.CCt10❑
air
arl6ce cde var.wu
DFRRTS CAGE
114' HDPE plate (optional)
HDPE structural plastic with
4" 2 1 tl hue and I Isla
/ / P
manufactured Inc. r Plastic
Solutions Inc. or equal
shown with optional plate
HDPE Mbvctaral plastic w11.h
holes and 1/4- plate
manufactured hp Plastic
'W,A ons Inc or equal
PLASTIC
SOLUTIONS P.D. aox ary8a
4ineheerer Ya 22604
INC. 877-877-67Z7
wn plastic-dwataa
SWM FACILITY A SUMMARY ASBUILTSWM FACILITY
Elevation,
ft.
Area of
Contour, sf
Volume,
cf
Elevation,
ft.
Area of
Contour, sf
Volume,
cf
418
616
0
418
981
0
420
1,437
1,996
420
2,180
3,082
422
2,558
5,937
422
3,360
8,580
424
3,810
12,264
424
4,395
16,312
426
5,191
21,229
426
5,345
26,036
435
AP
ROVED
30" CL. III
RCP STA
4DPIPE w
TRASHRACKS
SHALL E
ERVE AS
THE RISE
430
STRUCTURE
RISER
STRUCTI,
RE RIM
430
ELE
.=
w/ONE()
01.S"L
W-FLO
APPR
VED BA
IN FLOOR
z '
ORIFICE
/ INV
ELEV=
SHALL
AVE POS
TIVE SL
PES
4
8.03'
TO TH
ORIFIC
EIN ALL
OCATIO
S
425
425
CONT
ACTOR
HALL
'
STALL
HEEMB
NKMENT
INACC
RDANCEw/THE
SHOWN
p
ON
HISSHE
T.
r
420 ASBUILT
420
?Repo
GRADE
o
-2%MAC,
FLOOR
ELEV.=
418 ±
415
415
APPROVED
RI
ER BASE
AND BARI
L
EXISTIN
CONNE
TION SH
LL BE FIRMLY
EMBEDDED
GRADE
6" INTO
A, REINFORCED
i8"
HICK CONCRETE
FOUN
5x5
BELOW
THE LIMI
S OF THE
BASIN GRADING
APP
OVED 0
5" CL. III FCFIBARREL
TO PRE
ENT FLOTATION.
w/VDOTST
.EW-i(
-, NV.
410
=4s6,ee',
INV. OUT
4154g')
410
41 .0
415-59
w Lu
o
,°.�
°o. m
N
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W Lu
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aD N
l7 0
a
a
a
W LL
0+00 0+50 1+00 1+50 1+75
SWM FACILITY A SECTION
—AMENDED 40' WIDE VDOT CL. I -
RIPRAP LINED EMERGENCY
SPILLWAY CREST 42453
ELEVATION=ila4 5e'
(10' TOP OF DAM ELEV. = rrxGee')
4z6.o5'
APPROVED VDOT#3 COP
AGGREGATE OUTLET
PROTECTION w/ GEOTEXT
FILTER FABRIC UNDERLAYM
(L=11&L, W=4, D=2' MIN.
15' 24'
APPROVED BASIN SPIL
SLOPES SHALL BE 4:1 C
TO PROVIDE A SM
VEHICULAR TRANSITI(
THE ACCESS ROAD & T
THE GRASS LINED SI
430
Perforated c
SECTION A-9: TYPICAL, GR-UHIC-AL DETAMS
Homogeneous fill
r- - - ------�
Cut off trench-4' habit ellitahkl
Soil or rock L - - - - - - motBria� - - J
TYPICAL HOMOGENEOUS
EMBANKMENT
'Pipe outlet Coarrsse� fi��Cer
ollector or: U Sr
Foundation drain
FOUNDATION DRAIN
drain
ZkTrunti0on filter
CHIMNEY DRAIN
greed Of Vora
outlet
�e
Transition fill
Rock or gravel
`,Blanket drain
BLANKET DRAIN
Roe< or gravel
drain
Tronaition filter
TOE DRAIN
Figure A -la. Homogetteons Embankments it S'et7)age Controls
PROFILE SCALES
430
1"=5, M
1"=5o'(H)
RSE
EXISTIN
GRADE
LE
ENT
425
425
-WAY SIDE
*Gil
4 z'
R FLATTER
OOTH
PROPOS
IN ALONG
D
) PROTECT
GRADE
ILLWAY.
420
420
w w
00
0
o
0
J J
W W
ry
N
N
171.'J
2
.t
d
S
W
0+50 0+75
APPROVED BASINS A & B NOTES:
i. SEE DETAIL ON PREVIOUS SHEET FOR RISER TRASHRACK/FRAME
& COVER.
2. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL
ORIFICE OPENINGS. SEE DETAIL ON THIS SHEET, OR EQUIVALENT,
FOR ORIFICE TRASHRACK DETAIL.
3. A REINFORCED CONCRETE FOUNDATION SHALL BE INSTALLED
ON THE RISERS AS SHOWN & SHALL MEETTHE MINIMUM
SPECIFICATIONS SET FORTH IN THE VESCH SPEC. #3.14.
420 420
415
410
APPROVED BASIN FLOOR
SHALL HAVE POSITIVE SLOPES
TOTHE RISER's LOW -FLOW
ORIFICE IN ALL LOCATIONS
O APPROVED RISER BASE AND BARREL
CONNECTION SHALL BE FIRMLY EMBEDDED 6"
INTO A REINFORCED 18"THICK CONCRETE
FOUNDATION THAT IS 5'xS', AND IS BURIED
BELOW THE LIMITS OF THE BASIN GRADING TO
PREVENT FLOTATION.
1400
GRADE
w w
°o
m
In
a
m o
W W
O
tD 0�t
H
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cci
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eA
E COUNTY OF ALBEMARLE
$ - = Department of Community Development
Y/A41lSP�
Construction Record Drawings (As -built) for VSMP
The following is a list of information required on construction record drawings for
stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the
construction record drawing be prepared by someone other than the designer. Please do not
provide design drawings as construction record drawings.
A. A signed and dated professional seal of the preparing engineer or surveyor.
B. The name and address of the firm and individual preparing the drawings on the title sheet.
C. The constructed location of all items associated with each facility, and the inspection records to verify
proper dimensions, materials and installation. The items include, but are not limited to the following:
1. Inspection Records and photographs for pipe trenches and bedding, including underdrains.
2. Video Pipe Inspection for any pipes which are not accessible or viewable.
3. Updated Location with geo-coordinates of all facilities.
4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities.
5. Current physical and topographic survey for all earthen structures. Ponds should include a survey
of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required
for alterations from the design.
6. Plants, location and type.
7. Plans and prordes for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the
installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s),
inlet and outlet protection, alignment and invert elevations compared to design.
8. Computations: For significant deviations from design, provide sealed computations verifying that
the as -built condition is equivalent or better than design.
9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical
sections and linings.
10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage
must be within platted easements. Provide copies of recorded documents.
11. Guardrail, fences or other safety provisions - Display die constructed location of all safety
provisions; fences, guardrail, including the type, length and applied end treatments, compared to
design.
12. Material layers - biofdter media, stone layers, sand layers, keyways and cores must be verified as to
material types and depths. Include inspection reports, boring or test pit reports and materials
certifications. Biofilter media must be an approved state mix.
13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable.
14. Compaction reports are required to verify fill compaction in dams.
15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning.
SWM FACILITY B SUMMARY ASBUILTSWM FACILITY B
Area of
Volume,
Elevation,
Area of
Volume,
Elevation, ft.
Contour, sf
cf
ft.
Contour, sf
cf
404
107
0
418
260
0
406
567
614
420
1,075
1,242
408
1,145
2,292
422
2,090
4,352
410
1,826
5,237
424
2,970
9,386
APPROVED 030" CL. III RCP STANDPIPE w/
TRASHRACKS SHALL SERVE AS THE RISER
415 STRUCTURE. RISER STRUCTURE RIM
ELEV.=peq,9a'w/ONE(z) 0z"LOW-FLOW
40404 RIFICE w/ INVERT ELEV.=pewee.
�9, 404.04'
APPROVED a5LWIDE GRASS
LINED EMERGENCY SPILLWAY
CREST ELEVATION=ge8:9e' 4o8.94'
410 (1o'TOP OF DAM ELEV.=4se-ea5 415
0+50 1+00 1+25
CONTRACTORSHALL INSTALLTHE
EMBANKMENT IN ACCORDANCE w/THE
DETAILS & NOTES SHOWN ON THIS SHEET.
405 501_,
APPROVED Oi5" CL. III BARREL
w/ VC STD. EW-1 F, INV.
IN=403.5c', INV. OUT=4e3.s4 )403.26.
4o3.z8'
03 7z'
APPROVED BASIN SPILLWAY SIDE SL
SHALL BE 4:1 OR FLATTER TO PROVI
SMOOTH VEHICULAR TRANSITION A
00 THE ACCESS ROAD & TO PROTECT
GRASS LINED SPILLWAY.
APPROVED VDOT#3 COARSE
AGGREGATE OUTLET
PROTECTION w/ GEOTEXTILE
FILTER FABRIC UNDERLAYMENT
(L=32-, W=6-D=2' MIN.)
23' 18'
SWM FACILITY A SPILLWAY SWM FACILITY B SECTION
415
EXISTIN
GRADE
420
420
F
OPES
DE A
-ONG
rHE
405
405
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LL
ASBUILT
PRGP95Ef}
GRADE
SWM FACILITY B SPILLWAY
SCOTT/R. CZ'LLINS'Z
Lic. No. 035791,`D
9/3/20��
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JOB NO.
122071
SCALE
AS SHOWN
SHEET NO.
1 OF 1