HomeMy WebLinkAboutWPO201600054 Plan - As-built 2021-12-13�I UKI°IVVAI CK MAINAL31tFICINI rAC.1L1I T -A- UC IAIL IZ:.ALC Ur I_=3U_J
/APPROVED BASIN FLOOR
PRESERVED SLOPES TO / / /gHA�L HALE P SITI�E SLOPES
REMAINRINDISTURBED/ORI\/ / T6 FH ERISALL L�CA FINS/
/VARAGADTTS & '
\ ° MAINTENANCE ESMT.
4/ / / / / D6.5443, PG.669 / / r
AMENDED 4a'WIDE VDOT CL.I
/4///// RIPRENCY
SPILL LINED
EMEAY G 42453'�
ELEVATION=4�4 58' 4z6.g5��
_./ ( TOP OF AM ELEV. _
//9:E S SWT
/ \ \
o /y / A DNDED WID
4Q1<'1/ GRALTNEDEb SWM GRATH \L\ \\ \ \ \
o+s r S APPROVED 030" CL. III RCP STANDPIPE /
yam} I
a) 10(� / / \ / TRASHRACKS SHALL SERVE AS THE RISER \ \ \ \ \
\ RIM
TIr ELEV.1425.SaO
w/ONESTRUCTURE. RISERTRUCTURE 01.5"LOW-F OW
5
/47 RIFICE w/INV\TELEV.\�r-\
0 ` \\ QPP�O ISER 6k5EAND-BARRR -, PPROVED�zS'CC III RCF\7o\ \ \ \\ \
\ L w/ VDOT STD. EVi!=�(68tF,
\ II NNiECYION H L E FIRMJ<Y EMBEDDED - i- / O
\0°�N "�T�Q�s' AND -IS BC1�AIE�- .V J n/y ''I,NyV.IN p�6++�INV'011 r1�5 9' \ \ \ \ \ \ \ \ \
\ \BE,0WTHE LIMITS QFTHE6�'5II�RABING-
\ 'FOd VE'PIT FLOAT_ATION___ _ / \ \ \ \ E
` APPROVED VDOT#3 COARSE AGGREGATE \
\ \\ ° ` ` \ \ \ / / / OUTLET PROTECTION w/ GEOTEXTILE FILTER
\ \� FABRIC UNDERLAYMENT (L-iB', W-i' D=2' MIN.) \ \ \ \ \ \
S70 \ \
o\
�-
EMBANKMENT NOTES:
AFTER AN INVESTIGATION OF THE SITE's SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY
AND AN EXAMINATION OF VA DEQ APPENDIX 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 A 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.
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A
MAINTENCEESYt�1T. \ \ \ \ \
DB.5443, PG.669
AMENDED io'WIDE
GRADED SWM GRASS
'6 -� LINED ACCESS ROAD 1
i �s
APPROVED 030" CL. III RCP / \ APPROVED BASIN FLOOR SHALL HAVE J
STANDPIPE w/TRASHRACKS SHALL g� \ POSITIVE SLOPES TO THE RISER's
SERVE AS THE RISER STRUCTURE. vY' -`.t / LOW -FLOW ORIFICE IN ALL LOCATIONS \
61 SER STRUCTURE RIM ELEV=4a}.98 4o8.02', \, \ /
w/ ONE (1) 02" LOW -FLOW ORIFICE key s� O+ O� 1 c t' r / /
w INVERTELEV.=
/ 4e4-a�
� 440o
\ IDTW�OSrvEYDAX/AR.S& \ \ 0�
l-' �'
4
MAINTENANCE ESM-G. � ` ��� (APPROVED 3y-WIDE GRASS LINED
ROVED RISER RISER BASE AND BARREL CONNECTION APPROVED-0t5" CL. III RCP `. r EMERGENCY SPILLWAY CREST
SHALL BE FIRMLY EMBEDDED 6"INTO A °� _BgRRELw/VDOTSTD. Ei^/ _- ! 1I ELEVATION=4'B8'9a 40894'
REINFORCED 18" THICK CONCRETE FOUNDATION,-(#8L_FTNV. INV. (1o'TOP OF DAM ELEV. =rrleea'I
THAT IS 5'x5', AND IS BURIED BELOW THE LIMITS °�_ -50, OUTT ) 0172_ 1p I / / 4.0h,
OF THE BASIN GRADING TO PREVENT FLOTATION. reo'..28 ti /
APPROVED STORMWATER MANA ANT BA TES:
1. THE REVIEW, PROPOSAL TALLATION OF THE RE �- , O I APPROVED PROTECTION
COARSE AGGREGATE
\ WALL ARE NOT P F TH15 SET OF PLANS. THE RETAINING - ' OUTLET PROTECTION w/ GEOTEXTILE FILTER
WALL BE I LL BE REV( EWED SEPARATELY.�\ FABRIC UNDERLAYMENT (L=i3`, W-ffD=2'MIN.)
z ' 8'
435
•
1/2" sine plated hook
attached with 0/8' feskener
VA.,
rath
Isometric
SCCtION
6/8' din hole
0
single B11P/ Fleva Lion
arLlcc
DEBRIS CAGE
1/4- HDPE plate (optional)
HDPR slruclural pinstic with
2-1/8" holes and 114" plate
manufactured by Plastic
Solutions Inc. or equal
=hewn with optional plate
HDPe nl.-.,a R, cal pleetic wtl.h
2-I,^a' holes and 1/4- plate
manufactured by Plastic
5olutwns Inc or equal
PLASTIC
SOLUTIONS F 0 Aos erya9
Minnnaer VA 22604
INC. e-n-e77-6727
rrs ple9ic-mlumecnm
SWM FACILITY A SUMMARY ASBUILT SWM FACILITY A
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
qDPIPE w
TRASHRACKS
SHALL E
ERVE AS
THE RISE
430
STRUCTURE
RISER
STRUCTIL
RE RIM
430
ELE
.=
w/ ON ()
01.5" L
W-FLOW
APPR
VED BA
IN FLOOR
2 '
ORIFICE
/ INV E
ELEV.=
SHALL
AVE POS
TIVE SL
PES
4
8.03'
TO TH
ORIFI
EINALL
OCATIO
S
425
425
-
CONTRACTOR
E
HALL
STALL
HE EMBANKMENT
INACC
RDANCEw/THE
DETAII 1;
R, NOTES
SHOWN
ON
THIS SHE
V
T.
N
420 ASBUILT
I
420
fFK�
GRADE
°
-2%MA
FLOOR
EL EV=
428 *-
415
415
APPROVED
RI
>tK BASE
ND BAR
EL
XISTIN
CONNE
TION SH
LL BE FI
MLY EMB
DDED
GRADE
6" INTO
A, REINFO
CED 18" THICK
CO
CRETE
FOUN
5x5
BELOWTHELIMF
5 OF THE
BASIN GRADING
APP
OVED 0
5" CL. III FC
BARREL
TO PRE
ENT FLOTATION.
w/
VDOT ST
.EW-1(
NV.
410
=4t6.ee',
NV. OUr
4a5 49')
410
41 .0
415.59
W W
O
rOr1 n
00 Ol
N
J J
W W
rmV
6 N
06 N
l7 L7
�
It It
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
SPILLWAYCREST 424.531
ELEVATION=4;:4.5e'
(20' TOP OF DAM ELEV. = 426.ee')
4z6.o5'
APPROVED VDOT #3 COP
AGGREGATE OUTLET
PROTECTION w/ GEOTEXT
FILTER FABRIC UNDERLAYN
(L=161, W=5', D=2' MIN.
15' 2y'
APPROVED BASIN SPIL
SLOPES SHALL BE 4:1 C
TO PROVIDE A SN
VEHICULAR TRANSITI(
THE ACCESS ROAD & T
THE GRASS LINED SF
430
SECTION.A-9: TWICA L GRAPEI AL DETAMS
Homogeneous fill
F---------I
min `!'Cut off trench-� below elrtahkl
material
Sol a rack L - - - - - - - - - - - j
TYPICAL HOMOGENEOUS
EMBANKMENT
Tmroition fill
o(dL or gravel
'Pipe outlet Coarse fi��Cr
Perforated collector oround gI0t5
Foundation drain Blanket dran
FOUNDATION DRAIN BLANKET DRAIN
/ dram
Sand, grmtl or rock
E1ei11 outlet
Rou cr gravel
Rock to: �; dram
20
�Transilion ,liter hicimAion filter
CHIMNEY DRAIN TOE DRAIN
Sorn'ce' SCS Fnsmrerinr Field Alanual
Figure A-Ia. Hornogerreons Ewbanknrenrs it S'eepage Controls
PROFILE SCALES
430
1"=5' (V)
1"=5o'(H)
RSE
EXISTIN
GRADE
LE
ENT
425
'"
425
.WAY SIDE
-
4 2'
R FLATTER
OOTH
ROPOS
IN ALONG
D
)PROTE
GRADE
ILLWAY.
420
420
W W
00
J J
00
O
lD
W Lu
ry
N
N
6
l7 t7
It
W lL
0+50 0+75
APPROVED BASINS A & B NOTES:
I. SEE DETAIL ON PREVIOUS SHEET FOR RISER TRASHRACK/FRAME
& COVER.
z. 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
TO THE RISER's LOW -FLOW
ORIFICE IN ALL LOCATIONS
APPROVED RISER BASEANDBARREL
CONNECTION SHALL BE FIRMLY EMBEDDED 6"
INTO A REINFORCED 18"THICK CONCRETE
FOUNDATION THAT IS 5'xS', AND IS BURIED
BELOW THE LIMITS OFTHE BASIN GRADING TO
PREVENT FLOTATION.
1400
SCOTT/R. CIDLLINS'Z
Lic. No. 035791,E
9/3/20��
A
4, COUNTY OF ALBEMARLE
S _ • Department of Community Development
Construction Record Drawings (As -built) for VSMP
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The following is a list of information required on construction record drawings for
a
stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the
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construction record drawing be prepared by someone other than the designer. Please do not
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provide design drawings as construction record drawings.
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A. A signed and dated professional seal of the preparing engineer or surveyor.
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B. The name and address of the firm and individual preparing the drawings on the title sheet.
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C. The constructed location of all items associated with each facility, and the inspection records to verify
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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.
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5. Current physical and topographic survey for all earthen structures. Ponds should include a survey
w/
li
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
o
r`Ri
must be within platted easements. Provide copies of recorded documents.
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11. Guardrail, fences or other safety provisions - Display the constructed location of all safety
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provisions; fences, guardrail, including the type, length and applied end treatments, compared to
on
design.
12. Material layers - biofilter 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 ASBUILT SWM 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
:XISTIN
GRADE
415
APPROVED 030" CL. III RCP STANDPIPE w/
TRASHRACKS SHALL SERVE AS THE RISER
STRUCTURE. RISER STRUCTURE RIM
ELEV.=a'w/ONE(z) 02'LOW-FLOW
RIFICE w/INVERT ELEV.=4e4.ee.
40404
�91 404.04'
APPROVED a5LWIDE GRASS
LINED EMERGENCY SPILLWAY
CREST ELEVATION=4e8�e'4o8.94
410
(1o'TOP OF DAM ELEV. =4seee5 4�5
w W
00
Ol
cn
a) O
W W
O
L7 0
rOl
It It
s S
W lL
0+50 1+00 1+25
CONTRACTOR SHALL INSTALLTHE
EMBANKMENT IN ACCORDANCE w/THE
DETAILS & NOTES SHOWN ON THIS SHEET.
405 5°'
APPROVED 015" CL. III RCP BARREL
w/VDOTSTD.EW-1 F, INV.
IN=4c3.5c', INV. OUT=4e3:r4')
403 7z' 4o3.z8'
APPROVED BASIN SPILLWAY SIDE SL
SHALL BE 4:1 OR FLATTER TO PROVE.
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=+2'; W=6=D=2' MIN.)
23' 18'
SWM FACILITY A SPILLWAY SWM FACILITY B SECTION
415
EXISTIN
GRADE
410
410
h
v
w
OPE$
DE A
-ONG
rHE
405
405
W W
n
S
J J
W W
N
It
L7 l7
s
W w
0+50
ASBUILT
�FB
GRADE
SWM FACILITY B SPILLWAY
APPROVED
by the Albemarle County
Communit Development Department
Date 11/8/21
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JOB NO.
122071
SCALE
AS SHOWN
SHEET NO.
1 OF 1
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