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PANEL NUMBER 510003C 0279 D. EFFECTIVE DA TE-Ffbri
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STORMWATER MANAGEMENT COMPLIANCE SUMMARY
;HE DEVELOPMENT OF BELVEDERE PHASE 5, TMP 62--16D, WILL. OCCUR IN TWO SEPARATE STAGES OF CONSTRUCTION. jHL Ill0iVl ILL
UTILIZE AN EXTENDED DETENTION FACILITY TO FACILITATE CHANNEL AND FLOOD PROTECTION. STORMWATER RUNOFF WILL BE COLLEC IEL) Al\
THROUGH A STORMWATER PIPE NETWORK TO THE FACILITY, NUTRIENT OFFSET CREDIT PURCHASE ROUNDS OFF THE STORMWATER APPROACI
9VAC25-870-63. WATER QUALITY DESIGN CRITERIA REQUIREMENTS.
1. NEW DEVELOPMENT, THE TOTAL PHOSPHORUS LOAD OF NEW DEVELOPMENT PROJECTS SHALL NOT EXCEED 0.41 POUNDS PER ACRE PER YEAR, AS
CALCULATED PURSUANT TO 9VAC25-870-65.
CALCULATIONS SHOWN ON THIS PLAN WERE DETERMINED FROM ACCEPTABLE METHODOLOGY 'DEQ VRRM FROM NEW DEVELOPMENT COMPLIANCE
SPREADSHEET -VERSION 3.0."
CONCLUSION:
BASED ON NEW DEVELOPMENT OF BELVEDERE PHASE 5 (A AND B), TMP 62-16D, SHOWN HEREON THESE PLANS, THE WATER QUALITY PORTIONS OF THIS
PLAN WILL BE SATISFIED WITH PURCHASING 9.68 IB/YR OF OFFSITE NUTRIENT CREDITS IN THE SAME OF ADJACENT HYDROLOGIC UNIT CODE (02080204).
COMPLIANCE OF 9VAC25-870-65.F: OFFSITE ALTERNATIVE IAW 9VAC25-870-69 PURCHASE OF NUTRIENT OFFSET CREDITS IS PROPOSED AND AFFIRMED.
REGARDING WATER QUANITY ANALYSIS FOR POINT OF DISCHARGE #1
COMPLIANCE OF 9VAC25-870. 13.1.13(CHANNEL PROTEGTIQ :
►N ACCORDANCE WITH CHANNEL PROTECTION SECTION B.3-A) OF 9VAC25-870-66 OF VIRGINIA LAW, THE MAXIMUM PEAK FL0 4 RA
>� - -inn i;) cTr-)P,0 F0! 10!fi!Nr' THE I AN.IF- Pl7l'RPING ACTIVITY APPFAPQ TO BE iN ACCORDANCE WITH THE ENERGY BALANCE ME.
ii`.,
- I I_ t 1 YP (�PRF . I')FVF! OPF a , * PVPPF-- ;)FVR 01P11:0) iPVPF'VFl {)Ppl
POINT OF ANALYSIS 2:
1YR QDEVELOPED S I.F.* (1YR QPRE-DEVELOPED * RVPRE-DEVELOPED)/RVDEVELOPED
0.772 S 0.80* (1.597 * 0.515)/ 0.680
0.772 S 0.97 ch
COMPUANCE OF 9VA025-870-66.0 (FLOOD PH VECTIONI):
0
A Rt,=EREN(,_'E TO FLOOD PROTECTION SECTION C.1), THE SITE'S POINT OF DISCHARGE RELEASES CAPTURED STORMWAi-ER INTO A CON1\4 YA,I,"at•f-
THAT, FOI-LOWING LAND DIST►_fRBING ACTIVITY, CONFINES THE POST —DEVELOPMENT PEAK FLOW RATE FROM THE "10—YFAR �q__�ar)i Ir,
`' PED <_ Q10PRE-DEVELOPED
T!i� rt,dl C �iCT�Ad rl!1CT_Cl; �,fE , '�
Oiln1`�jj I --- 1A`vLlrvr'(vlb� I (l.' Lb 4_zu/ CTS U 10r NL--I;I_'V Lur mLNT = 4.373 Cfs
- Q Q - r .� I'1 r-t n r-- r1 r• i jr! n r` # i r ?, i T _... 4.373 C I S
POINT OF ANALYSIS 2:
Q10POST-DEVELOPED S Q10PRE-DEVELOPED 2
5.31 ds S 7.63 ds
VSMP AM I. , NDMENT # FOR
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ALBEMARLE,
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VICINITY MAP
SCALE: 1 "=1000 FEET
EXISTING INTERMEDIATE CONTOUR
- 332
EXISTING INDEX CONTOUR
— JOT -
PROPOSED CONTOUR
20
EXISTING EDGE OF PAVEMENT
EX. EP
PROPOSED EDGE OF PAVEMENT
EP
EX. C&G
EXISTING CURB AND GUTTER
'
PROPOSED CURB AND GUTTER
CG-6
TRANSITION FROM CG-6 ROLL-TOP
CG-6 ROLL-TOP
EX. 15" RCP
EXISTING STORM SEWER
201107
15" RCP
PROPOSED STORM SEWER
EXISTING SANITARY SEWER
-
PROPOSED SANITARY SEWER
PROPERTY LINE
I
EASEMENT LINE
- - - - - -
CENTERLINE
—
LIMITS OF CLEARING AND/OR GRADING
EXISTING SPOT ELEVATION
PROPOSED SPOT ELEVATION
+12.0
EXISTING TREE DRIP LINE
EXISTING TREE
PROPOSED TREE OAK
I
EXISTING WATERLINE
PROPOSED WATERLINE
EXISTING FIRE HYDRANT
PROPOSED FIRE HYDRANT
EXISTING WATER VALVE
PROPOSED WATER VALVE
PROPOSED WATER METER
EXISTING REDUCER
PROPOSED REDUCER
HANDICAP RAMP (CG-12)
DENOTES LOCATION OF STD. VDOT
CG-12 AND/OR JURISDICTIONAL
STANDARD RAMP CONSTRUCTION
PARKING INDICATOR
INDICATES THE NUMBER OF TYPICAL PARKING SPACES
BENCHMARK
SOILS BOUNDARY
VEHICLES PER DAY COUNT
PROPOSED STREET NAME SIGN
EXISTING SIGN
PROPOSED SIGN
SANITARY MANHOLE IDENTIFIER
STORM DRAIN STRUCTURE IDENTIFIER
12
ASSOCIATED PLANS WITH THIS PARCEL:
1. FINAL SITE PLAN SDP-2020-00036
2. ROAD & UTILITY PLAN SUB-2019-00170
3. EASEMENT PLAT SUB-2020-00123
4. RETAINING WALL DESIGN PLANS
SHEET INDEX
2
SHEET 1 -
COVER SHEET
SHEET
EROSION CONTROL NARRATIVE
SHEET 4 --------
EROSION CONTROL PLAN PHASE 1 - PHASE 5A & TLK4PORAHY FIRL � {
SHEET 5 -------
EROSION CONTROL PLAN PHASE 1 - PHASE 513
SHEET 5 - -- -----
EROSION CONTROL PLAN PHASE 1 - TEMPORARY FIRE ROAD
SHEET 7 ---------
EROSION CONTROL PLAN PHASE 2 -PHASE 5A & TEMF i,. �
SHEET 5
EROSION CONTROL PLAN PHASE 2 - PHASE 513
SHEET 9
EROSION CONTROL PLAN PHASE 2 - TEMPORARY FIRE ROAD
.�•-q ..�---}'' ARY FIRE ROAD
SHEET 11------
ElOS'ION CONTROL PLAN PHASE S - PHASE 56
2
SHET 12 ------
EROSION CONTROL PLAN PHASE S - TEMPORARY FIRE ROAD
,5 aw amp x E $ �,e $ '4C $ d.cdd''t.'.a.b 9 $_ € '$.>�` �'y5 $ '1E � � 'G... a i $•rvi
EROSION CONTROL NOTES & DETAILS
WATER QUAL17Y CALCULATIONS & COMPLIANCE
WATER QUANTITY CALCULATIONS & COMPLIANCE
.NAGEMENT POND CONVERSION
2
SHEET 18 -----
CULVERT D6,8K�N
VBMP AMENDMENT #2 (NARRATIVE
THE PURPOSE OF THIS AMENDMENT IS TO SHOW THE OFFSITE LIMITS OF CLEARING ON TMP 62-16A
AND SHOW THAT THE PRIVATE STORSEWER PIPES FOR LOTS 245-254 ARE NO LONGER DRAINING TO
THE RETENTION BASIN AS SHOWN ON SHEET 3 OF VSMP AMENDMENT #3 OF BELVEDERE PHASE IIB
(WP0201600071). THE REAR OF THESE LOTS NOW DRAIN TO THE FIRE ROAD DRY POND AS SHOWN
ON SHEET 18 OF THIS VSMP SUBMITTAL CHANGES TO THE OUTLET STRUCTURE ENSURE THAT THE
REGULATED STORMS ARE BELOW THE APPROVED, POST -DEVELOPED FLOWS. PER CONVERSATION WITH
COUNTY ENGINEER 6/7/22 0.18 LBS/YR OF NUTRIENT CREDITS WILL BE USED TO OFFSET THE
A PHOSPHOROUS REMOVAL THAT WOULD HAVE BEEN GENERATED FROM THE DRAINAGE GOING TO THE
RETENTION POND.
Pr�jecl M1�171r: 6ELVEDERE RHA5E5 data M%Wlceft
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Site Information
Post -Development Pro]eet (Treatment Volume and Loads)
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SHEET NUMBERING KEY:
INDICATES ORIGINAL
Al -- 2 � SHEET NO.
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NOICAIES AMENDMENT
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SHEET NUMBERING KEY:
INDICATES ORIGINAL
Al -- 2 � SHEET NO.
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FILE:
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RGA#:
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EROSION CONTROL PLAN LEGEND
3.02 ENOCONSTRUCTION
TRANCECE
3.03 CONSTRUCTION
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3.32 P SE ED NG MENANT PS PS
3.38 TREE PRESERVATION T
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AND PROTECTION
3.39 DUST CONTROL DC ---0--
*REFERENCE VIRGINIA EROSION AND
SEDIMENT CONTROL HANDBOOK (VESCH)
FOR DETAILS REGARDING INDIVIDUAL
CONTROL MEASURES.
BOUNDARY LINE INFORMA TION
LINE
BEARING
DISTANCE
L 1
N 81 °23'05 " E
26.04 '
L2
S 29" 1835 " E
27.36'
L3
N 71'09'25" E
27.84'
1 1 30 61 91
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\ SEDIM�EN TZAGE4AREAC-
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DATE:
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SCALE:
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FILE:
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RGA#:
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SHEET: * OF 18
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B/M 1 TO BE INSTALLED ON CONSTRUCTED SLOPE
ALONG THIS FIRE ROAD ROUTE, GREATER THAN 10
;� \ VERTICAL FEET. MATTING TO BE INSTALLED WITHIN
��•��� a + 0 48 HOURS OF ACHIEVING FINAL GRADE.
— PROPOSED PUBLIC
DRAINAGE EASEMENT
ALBEMARLE COUNTY qS
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IAN
SCALE: 1 "=30'
BOUNDARY LINE INFORMA TION
LINE
BEARING
DISTANCE
L I
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N 81 °23'05" E
26.04'
L2
S 29° 7 835 " E
27.36'
L3
N 71 °09'25 " E
27.84'
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�� �'' G SEDIMENT TRAP. TEMPORARY SLOPE DRAINS ARE TO
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# : , CONSTRUCTION EASEMENT �P ��� \\
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CHECKED BY:
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DATE:
06-11-2020
SCALE:
1 "= 30'
FILE:
wPo-2020-00034
RGA#:
8438
SHEET: • 120F 18
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TEMPORARRY SEDIMENT TRAP
TOTAL REQUIRED BASIN STORAGE =134CY X 2.96 AC = 397 CY
TOTAL AVAILABLE BASIN STORAGE= 4,040 CY
WEI STORAGE
REQUIRED HALF OF TOTAL STORAGE
MINIMUM 67 CY X 2.96 AC = 198 CY
SET WET STORAGE AT ELEVATION 432.5 WHICH CORRESPONDS TO THE
TOP OF THE RISER. 461 CY OF STORAGE IS AVAILABLE AT ELEVATION
432.5.
SET CLEANOUT ELEVATION 0 429 = 211 CY OF STORAGE AVAILABLE
DRY STORAGE
MINIMUM 67 CY X 2.9.6 AC = 198 CY
TOTAL DRY STORAGE AVAILABLE BETWEEN 432.5 - 440 = 2592 CY
EMBANKMENT TOP = 440 (ELEVATION OF FIRE ROAD)
EMBANKMENT WIDTH = 30 FEET (WIDTH OF FIRE ROAD)
AS -BUILT STAGE STORAGE TABLE
ELEV
AREA
(sq. ft.)
DEPTH
(ft)
AVG END
INC. VOL.
(cu. ft.)
AVG END
TOTAL VOL.
(cu. ft.)
426.50
120
N/A
N/A
0.00
428-00
29607
2.00
3,159
3o841
430.00
39711
2.00
8o795
1206
432.00
5v084
2.00
lls643
24t279
434.00
6s559
2.00
1034
399113
436.00
8t275
2.00
189571
579684
438.00
129656
2.00
2Z952
8Ot636
1. 440.00
159799
2.00
1 28,455
109,091
WATERSHED SUMMARY TO POA #2
PRE DEVELOPMENT
POST DEVELOPMENT
SITE AREA = 2.68 ACRES
ITE 2.9 AC ES
CURVE NUMBER (CN) = 65
c E 69
TIME OF CONCENTRATION = 9.9 MIN
TIME OF CONCENTRATION - 9.9 MIN
9VAC25-870-66.B.3: CHANNEL PROTECTION ENERGY BALANCE CALCULATIONS - 1 YEAR
PRE -DEVELOPMENT CONDITIONS
POST -DEVELOPMENT CONDITIONS
'mhv 4=mblv 1�� 4=!!kl* 4=_1l*v 1=n�_
POST -DEVELOPMENT CONDITIONS ROUTED
4=sv--mN
1 -YR Q(PEAK) = 1.597 CFS
1 -YR Q(PEAK) = 2.62 CFS
4--N 4=nA_
0
1 -YR Q(PEAK) = 0.75 CFS
TIME TO PEAK = 12.03 HRS
TIME TO PEAK = 12.03 HRS,
TO PEAK = 12.27 HRS
VOLUME 5,169 CU.FT
V,
OLUME = 7,540 CU.FT
LTIME
VOLU
VOLUME = 1,879 CU.FT
9VAC25-870-66C: FLOOD PROTECTION - 10 YEAR
PRE -DEVELOPMENT CONDITIONS
POST -DEVELOPMENT CONDITIONS
POST -DEVELOPMENT CONDITIONS ROUTED
1 0-YR Q(PEAK) = 7.63 CFS
0-YR Q(PEAK) 9.92 CFS
10-YR Q(PEAK) = 1.53CFS
TIME TO PEAK = 12.03 HRS
T
(TIME TO P:EAK 126.03 HIRS
TIME TO PEAK = 12.40 HRS
S
/2\
VOLUME - 20,152 CU.FT
OLUM:E= 25,966 CU.FT
RVOLUMIE lk FT
O,U
VOLUME 25,957 CU.FT
jj''J��
ENERGY BALANCE EQUATION:
QDEVELOPED 1. F. *(QPRE- DEVELOPED* RVPRE- DEVELOPED) /RVDEVELOPED
DEVELOPED :!�� 1. F. * (lYR OPRE-DEVELOPED * RV PRE- DEVELOPED) /R V DEVELOPED
0.76 !E� 0.80* (1.597 * 0.515) 0.680
0.75 2 0.97 cfs
FLOOD PROTECTION:
Q10POST- DEVELOPED Q10PRE- DEVELOPED CURRENT CONDITIONS
PRINCI
1.53 cfs A 7.6 3 c f s
2 WWI
GOAL IS TO COVER R PI ATF7"
"OR
MAX
POA
1#2
% 20' PUBLIC DRAINAGE &
(M�2,j MAINTNIAN(T FA�FIVIFNT
PRE -DRAINAGE AREA TO POA#2: 2.68 1
CN = 65
Tc: 1 W sheet floW W/ A ELEV 9 & 45Y
OF CONC. FLOW W/ .\ ELEV. ml
Tc: 9.9 min
PRE - Q 1 year = 1.60 cfs
PRE - 0 10 year = 7.63 cfs
FIRE ROAD PLAN VIEW
NARPATIVE:
THE EXISTING SEDIMENT TRAP (WPO-2016-00071) WILL BE MODIFIED AS SHOWN
HEREON THESE PLANS TO CAPTURES A DRAINAGE AREA OF APPROXIMATELY 2.96
ACRES. A 15m PIPE WITH A 48* RISER AND ANTI -VORTEX DEVICE HAS BEEN BUILT
AND SHOWN. A PRINCIPAL SPILLWAY WEIR PLATE IS NECESSARY IN ORDER TO
REDUCE THE ENERGY BALANCE AND 10YR STORMWATER POST -DEVELOPED PEAK
FLOWS TO BENEATH THE APPROVED PLAN LEVELS. THE WEIR PLATE ON THE RISER
IS SHOWN BELOW.
DURING THE EROSION CONTROL PHASES, CONTRACTOR TO INSTALL A HORSESHOE
RING OF AGGREGATE AROUND THE RISER THAT WILL SERVE AS, A FILTER FOR
WATER TO PASS THROUGH SIMILAR TO THAT FOUND WITH THE TRADITIONAL
SEDIMENT TRAP DESIGN.
THE STORMWATER QUANTITY REQUIREMENTS AT POINT OF ANALYSIS #2 (POA #2)
MEET THE MINIMUM CHANNEL AND FLOOD PROTECTION REQUIREMENTS SET FORTH
IN 9VAC25-870-66.
TOP OF ORIFICE
... .........
... .............
. ..... ....
6
7: 71% (9) X 210 (OR LONGER
TAPCON (OR EQUAL�
EPDXY
..... ......
.... ... ..
..........
................
12" ORIFICE 0 426.5" (EX.) OUTFALL PIPE
HP STORM TRENCH INSTALLATION DETAIL
MIN. COVER TO
RIGID PAVEk4ENT
FINAL
SPRINGUNE INITIAL
BACKFI'-
.............
4" FOR 12--24'PIPE BED NG
6' FOR 3f)*-60* PIPE KON TRENCH VADTH SLRTA6t E
NOTES., (SEE TABLE) FC)UNDATION
I. ALL PIPE SYSTEMS SHALL BE INSTALLED IN ACCORDANCE WITH ASTM 02321. "STANDARD PRACTICE FOR UNDERGROUND
INSTA, LATION OF THPrqKArlPl AS t lr PIPE F00 Qr- r!0Q AMI CNTWr_C� rV�AkYl'ry C4 nNA� AbOl Ir-A T InKIC' I A tC01 Ar��ITI
TABLE 1. RECOMMENDED MINIMUM TRENCH VADTHS
PIPE DIAM.
MIN. TRENCH
WID�H
12'
301
(300mm)
(762mm)
16*
34'
(375mm)
(864mm
'a.
39*
(99 1 rilm
24"
48*
Vf)mm)
(1219min;,
30"
56,
i'750rnrn)
(1422mrn
36-
64'
(900mm
11626mm)
42"
72'
(i n5amm 1
(1829mm)
481,
80,
(1 200mrn I
I
M32rmn)
60"
96'
0500triml
f2438rmii)
TABLE 2, rMNIMUM RECOMMENDED CO'�"Erk BASED ON
VEHICLE LOADING COND11IONS
SURFACE LIVE LOADING CONDITION
PIPE DIAM.
H-25
HEAVY CONSTRUCTION
(75T AXLE LOAD)
12" - 48'
12-
49*
(300inni - 120ftm)
(305orm)
(121 9mm)
6
'o.
24-
1
60"
1 'I 500mm)
(6 , om M)
1 �
! S24mm)
'VEHICLES IN EXCESS OF 75T MAY REQUIRE ADDITIONAL COVER
WITH THE EXCEPTION THAT THE INIT`IAL BACKFILL MAY EXTEND TO THE CROWN OF THE PIPE. SOIL CLASSIFICATIONS
ARE rER THE I ATEST VERSION OF AQTKA rA AQQ lklP KIATCOI.N1 C! lilu f-u t,� nact C I or, I TABLE 3, MAXIMUM COVER FOR ADS HP STORM PIPE, ft
I - �N 1� 14 r 1%�v L)� vcr�o -IJINO Ur
A"�TM DV&ll ARE NOT APPROPRIAIF BACKFILL MATERIALS.
2. MEASUHIES SHOW, D HE 1 AKEN To f-RFVENT MIGRATION OF NATIVF F INES IN 10 BACKFh 1. MATERIAL. WH EN REOUIRED.
3. FOUNDATION: WHERE I HE I RENCF4 BO TTOM IS UNSTABLE, THrl, CONTRAC. I OR SHALL EXCAVATE TO A 0 EPTH REQUIRKi
BY THE E INGINEER AND REPLACEWITH SUITABLE MATERIAL AS SPECIFIED BY THE ENGINEER. AS AN ALTERNATIVE AND
AT THE DISCRETION OF THE DESIGN ENGINEER THE TRENCH BOTTOM MAY BE STABILIZED USING A GEOTEXTILE MATERIAL.
4. BEDDING' SUITABLE MATERIAL SHALL BE CLASS L W III, OR IV. THE CONTRACTOR SHALL PROVIDE DOCUMENTATION FOR
MA" FRIAL SPECIFI(.AlI()N TO F NGINEER. COMPACTION SHALL BE SPECIFIED BY THE ENGINEER IN ACCORDANCEWITH
TABLE 3 FOR THE APPLICABLE FILL HEIGHTS LISTED. UNLESS OTHERIAISE NOTED BY THE ENGINEER, MINIMUM BEDDING
THICKNESS SHALL BE 4"1 lWmm: FOR 12'-24"(3NrTim-600mrr,i DIAMETER PIPEj 6"(150rmn� FOR 30%6lY�750mfr-1500fn1ll)
DLE V3 BENEATH THE PIPE INVERT SHALL BE LOOSELY PLACED. PLEASE NOTE, CLASS IV
)JAMETER PIPE. THE MIDD
MATERIAL HASUN417, ED APPLICATION A44D CAN BE DIFFICULT TO PLACE AND COMPACT- USE ONLY WITH THE APPROVAL OF
ASOL EXPf-HT.
5. INITIAL BACKFILL-:. SIJITARL f - MATERIAL SHALL HE CLASS 1 11 111, OR IV IN THE PIPE ZONE F)K TENDING 70 rHP CROWN OF THE
PIPE, THE CONTRACTOR SHAU PROVIDE DO�CUMIENTATION FORNIA7ERIAL SPECIFICATION TO ENGINEER. NiATERIAL SHALL
BE INSTALLED AS REQUIRED IN ASTM D2324 LATEST EDITION. COMIPACTION SHALL BE SPECIFIED BY THE ENGINEER IN,
ACCORDANC.E INIT?l TABLE 'i FOR THE APPLICABLE FILL HEIGHTS LISTFID. PLEASE NOTF CLASS N NIATERIAI HASLIMITED
APPLICATION AND CAN BF �IFFICULT TO PLACE AND COMPACT'USE ONLY 'AlITH THE APPROVAL OF A SOk EXPERT-
6. MININIUM COVER: MINIMUM COVER, H IN NON -TRAFFIC APPLICATIONS (GRASS OR LANDSCAPE AREAS) IS 12" 000mmi FROM
CLASS I
CLASS 11
CLASS III
CLASS
IV
PIPE DIA
COMPACTED
95%
90%
85%
96%
90%
95%
12"
41
28
21
16
20
16
16
(300mm)
0 2.5m)
(&5m)
(6Am)
(4.9m
'6.lm�
(4.9m)
(4.9m)
151.
42
29
21
16
21
16
16
(375mm)
12.8m
(8-Sm i
(6.4m)
(4,9mi
.6.4m i,,4.9ir,
(4.9m)
18"
44
30
21
16
22
t7
16
(450min)
(13.4m)
(90m)
(6.4m)
1(4.9m)
(6.7m)
19
(5.2m)
14
(4.9m)
14
24-
37
26
Is
14
(600mm)
(I 1.3m)
(7.9m)
(5.5m)
(4.3mj
5.81m)
(4.3m)
(4.3m)
3(r
39
27
19
14
19
115
14
(750mm)
(I I Jqm)
(&2m i
i 5.8m)
(4.3rn'i,
f5.8mi
4.6m)
, (4.3m
36*
28
20
14
10
1.11
11
lo
(900mm)
(8.5m)
(&IM)
(4.3m)
(3.0m)
li i i
15
-1�4im d
(3.0m)
42"
30
21
14
10
11
10
(1050rrmi
(9.1rm
(6_4ml
(4.3m I
(3.0m)
i 1.6m
�i_3.4m i 1
(3.0m�
48'
29
21.1
4
9
14
10
10
120amm)
(8.8m)
(6.1 ri 0
ja
0.31n)
14
(Z7rr)
(3
(4.3m)
14
(3.0m)
10
(3.0m)
9
w
29
f l5n0frrn)
(8.8m)
(6.1 m)
� 4.3m)
(2.7m)
(4.3m�
0.0m).
(2.7m)
I rl� I UP 0V PIPE I Q GROLINU SURPACF. A00I t IONAL COVER MAY BE IREQUIRF.D TO PRFVFN-, VLOI A I IoN. FOR rRAr-Fl(; FILL HEIGHT TABLE GENERATED USING AASHTO SECTION 12, LOAD
APPLICATIONS; CLASS I OR 11 MATERIAL COMPACTED TO 90% SPID AND CLASS III COMPACTED T 0 95% SPID IS REQUIRED. RESIqTANCE FACTOR DESIGN (LRFD) PROCEDURE V.1 I H THE FOLLCPMNG
9:OR TRAFFIC APPILICATIONS. MINIMUM COVER, H. IS 12^ (300mm) UP TO 48" (1 200mm i DIAMETER PIPE AND 24* f i 600mm I OF ASSUMPTIONS:
COVER FOR 630* (15Mmmf DIAMETER PIPF MEASURED FROM TOP OF PIPE TO BOTTOM OF r� FXIRL-F PAVU.MENT NO HYDP08TejIC PRESSURE
OR TO TOP OF RIGID PAVEMENT. UNIT WEIGHT OF SOIL (ys) z 120 PCF
7. FOR ADDITIONAL INFORMATION SEE TE CHNICAL NOTE 2.04. 1' 6 J_ REV. MA)3MUM COVER HEIGHTS RWD 011OV17
vlalagAm.m I RM F�� CFdPTI0N BY MMODIDNY C_M_W�D
ADVANCED DMNAGE SYSTEMS. INC:� ('ADS-) HAS PREPARED THIS DETAIL BASED ON INFORMATk)#4 MOVIDED TO ADS. THIS DRAWING IS
INTENDED TO DEPICT THE COmPONENTS AS REQuESTED. ADS HAS NOT PFRFORMED ANY ENICAuEERING OR DESIGN SERACES FOR THIS
PROJECT, NOR HAS ADS INDEPENDENTLY VERIFED THE INFORMATION SuPPLIE(). THE INSTALLATION DETAILS PROVIIDEO HEREIN ARE GENERAL TRENCH INSTALLATION 4UO TRIJEMAN BLVD
RECOMMENDATIONS AND ARE NOT SMCIFlr; FOR THIS PROJECT. THE DESIGN ENGINEER 1314ALL R.E�nEVW THESE DETAILS PF40R TO
r
I
DETAIL (FFP STORM) HILLIAR13,0141043026
,EEDS THE Lm
C0N8TRLjCjj0Pk 17 13 THE DESIGN ENGINEERS RESPONSINLITY TO ENSURE THE DETAILS PROMDED I FREIN MEETS OR EXr mj
APPLICABLE NATION.,%_ STATE OR LOCAL REOUIREMENTS, ANC TOE%SURE T14AT THE DETARS r-ROvIDED kiEREIN ARE ACrE-PTABLE .�:IDR ToAS
PROJECT. I DRAVONG Nvh%[��. 1 .1 � 11
24n
sm-
HORSESHOE RING OF AGGREGATE
(EROSION CONTROL PHASE�
2.5'
COARSE AGGREGATE
ELEV - 429.00
3' HIGH
ELEV - 426.00
CLASS I RIPRAP
A2
RECOMMENDED FABRICATION:
,,.o--,rHOLE Vv FROM TOP TO BE
USED FOR CLEVIS ATTACHMENT
& UFT, THEN BOLD
ATTACHMENT (typ. OF 3)
18 so
'*`jr HOLE lw FROM
SIDE WALL FOR
BOLTS (TYP. OF 6)
131d.L6 r-L^ I r- 1 V L2r- P%r%%.orlr-U 1 V r 1 1 r-A I r-r%lVr%
RADIUS OF A STO. 4 FT. MANHOLE
2e
80 0 80 160 240
m m 0 %?6" -m I
q C A T.F. - 1 " =2 *' m
FIRE ROAD PIPE PROFILE
HORIZ. SCALE: 1`30'
VERTICAL SCALE: I"=10'
455
455
><
Ui
--iry
450
L-Li
Lr-
1.110
450
FIRE ROAD 'TOP OF
ry -
DAM 4". 00
rn <
445
r
445
440
440
435
3
AS -BUILT 48'0 RISER
AS -BUILT 48" RISER CREST
C5
PROPOSED FIRE
DCREST
ELEVATION AT 2.500
ELEVATION AT 432.50'
430
ACCESS ROAD
30
30
RNISH[ED GRADE
WTH REVERSE
425
SLOPE BENCH
425
2
A2
420
lo
42
BASIN BOTTOM & STABIUZED
FINISHED GRADE = 426.50.
415
41
RISER TO HAVE STEEL PLATE
COVER THE BOTTOM HALF OF
THE 12" LOW FLOW ORIFICE AT
410
clllj I
41
ELEVATION 426.5 Wil0i
SATISFIES THE ENERGY BALANC
REQUIREMENTS. TRASH RACK T
405
EXISTING GRADE
40
BE INSTALLED OVER ORIFICE
400
- -J
400
395
9+75
10+00
11+00
12JO0
OUTLET PROTECTION
IS SIZE
IN ACCORDANCE
WITH PLATE 3.18-3
OF THE VIRGINIA EROSION
CONTROL MANUAL.
3Do - 15" * 3 3.75'
OP#2 0--UTLET-
-PROTECTION
La 8.5' MIN
W Do + Lc 1.25
+
8.5 = 9.75' *DESIGN
SPECIFICATIONS
ENGINEER RECOMMENDS FULL CHANNEL WIDTH
M I N
8.5'
CL
I RIPRAP
VDOT EW-1 HEADWALL
15" HP PIPE
Ln
EC-1 CLASS I Ln
Ql = 0.!75 cfs r-- L.LJ
c�
s RIPRAP
rQ2 = 1.00 cfs
(117
n I 1� 24" MIN. DEPTH
2
Ql 0 1. 53 cfs W/UNDERLYING F.-
STANDARD EC-1 CLASS 1
REQUIRED TYPE A INSTALLATION
OUTLE7 PROTECTION MIN DEPTH OF
RIPRAP 24"
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DRAFrER:
DE
DESIGNER:
DEG
TRODUCTION: JILT
liq
1111111�111111,1 I q
op
a
24
Jimmy L Taggart
Lic. No.
841
OA 12 13/2022
ZONAL
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DATE:
07-1-2020
SCALE:
NA
FILE:
WPO-2020-00034
RGA#:
8438
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