HomeMy WebLinkAboutWPO202000034 Plan - Other (not approved) WPO VSMP 2023-01-04Mg r VVA 2 i � � i
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
COMPLIANCE OF 9VAC25-870.13.1.13 (CHANNEL PROTECTION .
1N ACCORDANCE WITH CHANNEL PROTECTION SECTION B.3.A) OF 9VAC25-870-66 OF VIRGINIA LAVr; 1HI1
24--HOUR STORM FOLLOWING THE LAND- DISTURBING ACTIVITY APPEARS TO BE IN ACCO1'
QDEVEI.OPED S 1.F,*(QPRE--DEVELOPED* RVPRE-DEVELOPED)/RVDEVELQPED
n -.,nr - _�-n a ,ram -, •,.n,- ,�n, - .n[;.
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 2
0.772 S 0.97 do
COMPLIANCE OF 9VAC25-870-66.0 (FLOOD PROTECTION):.
IN REFERENCE TO FLOOD PROTECTION SECTION CA), THE SITE'S POINT OF DISCHARGE. RELEASES CAPTURED STORMWATER INTO A CONVEYAN(A
THAT, FOLLOWING LAND DISTURBING ACTIVITY, CONFINES THE POST -DEVELOPMENT PEAK FLOW RATE FROM THE 10-YEAR 24-HOUR STORM EVENT 1� '
THE STORMWATER CONVEYANCE SYSTEM, 01OPOST-DEVELOPED S QtOPRE-DEVELOPED
P ,'iNT OF A.NA! Y�=IC I
C1"-)POS1 11) E-VE.L.C'MENT ; 5 EB VhIFiCE; _
DEV Ll PI IEN I(�" tD OpflCt = 3.8b, 0`i ,nr'KF -- O "ki 0r-M .N i = 4_,
POINT OF ANALYSIS 2:
OwKIST-DEVELOPED S WW-DEVELOPED 2
5.31 de S 7.63 da
E11,4 DM ENT ` 2 FOR
TM P 62 PARCEL 16D
RIO MAGISTERIAL DISTRIC "', 0in° UNTY OF ALBEMARLE, VA
ft
r
VICINITY MAP
SCALE: 1 "=1000 FEET
I CnCAIn
EXISTING INTERMEDIATE CONTOUR
- 332
EXISTING INDEX CONTOUR
-
PROPOSED CONTOUR
20
EXISTING EDGE OF PAVEMENT
------ EX. EP -------
PROPOSED EDGE OF PAVEMENT
EP
EX C&G
EXISTING CURB AND GUTTER
____ ____m
PROPOSED CURB AND GUTTER
CG-6
TRANSITION FROM CG-6 ROLL-TOP
CG-6 ROLL-TOP
EX. 15" RCP
EXISTING STORM SEWER
15" RCP
PROPOSED STORM SEWER
EXISTING SANITARY SEWER
—• —• —• —• —_ —• —
PROPOSED SANITARY SEWER
PROPERTY LINE
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
0 OAK
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
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- CONER BFEEr
EROSION CONTRUL I'LAfi PHA6L I - PhAbL 5A & I E PORARY FIRE RUAD
FPOSION rONTROL PLAN PHASE 1 - PHASE 513
a l�joiui'l L ONTROL PLAN PHASE 1 - TEMPORARY FIRE ROAD
FROSION %'!'11AITPOI_ PI .AN PHARF 2 - PHA,;F 5A & TEMPORARY FIRE ROAD
A2
SHEET 11 — EROSION CONTROL PLAN PHASE a - PHASE 6B �
,BEET 12 — ERMON CONTROL PLAN P114ASE S -TEMPORARY FIRE ROAD
n.
. _ E hUb UN GUil i'kOL I` OTES & DETAILS
RHFFT 15 -------- WATER QUALITY CALCULATIONS & COMPI_iiu�,i�.m
6HLL.,I. 16 --------- WATER QUANTITY CALCULATIONS & COMPLIANCE
T ;M AT -R NAGEMENT POND CONVERSION
2 SFI�T 18 --- CULVl9i� D6910N
( VSMP AMENDMENT #2 NARMINE
CTHE PURPOSE OF THIS AMENDMENT IS TO SHOW THE OFFSITE LIMITS OF CLEARING ON TMP 62-16A
CAND 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
C(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
C REGULATED STORMS ARE BELOW THE APPROVED, POST -DEVELOPED FLOWS. PER CONVERSATION WITH
Z COUNTY ENGINEER 6/7/22 0.18 LBS/YR OF NUTRIENT CREDITS WILL BE USED TO OFFSET THE
PHOSPHOROUS REMOVAL THAT WOULD HAVE BEEN GENERATED FROM THE DRAINAGE GOING TO THE
RETENTION POND.
Projed Irene: 6ELVEDERE PHA5E5 Cataan,utcds
Data: 61912OZ2 W MtaM raaac
Aw Dear@n Sped?knrAMs List. Z013 Draft 5tr' 3. Sp- ca"Immaceare
site Information
Post -Development Project (Treatment Volume and Loads)
MEET NUMBERING KEY:
-INDICATES ORIGINAL
A.2PLAN SHEET N0.
'-- INDICATES
AMENDMENT NO.
NDICATES AMENDMENT
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DATE:
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SCALE:
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FILE:
WPO-2020-00034
RGA#:
8438
SHEET: *_ OF 18
TEMPORARY SEDIMENT TRAP
ORIGINAL
GROUND
ELEV.
*SEE PLATE 3.13-1
67 CU. YD./ACRE
67 CU. YD./ACRE
(EXCAVATED)
*
1' VARIABLE
VARIABLE
N
4' MAX.
M
r, I VARIABLE*
FILTER CLOTH ORIGINAL
GROUND
ELEV.
COARSE AGGREGATE** CLASS I RIPRAP
CROSS SECTION OF OUTLET
CLASS I RIPRAP LENGTH (IN FEET) =
6 X DRAINAGE AREA
DIVERSION
DIKE
/ COARSE AGGREGATE
EXCAVATED
AREA
COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5
OUTLET (PERSPECTIVE VIEW)
SOURCE: VA. DSWC
EROSION CONTROL PLAN LEGEND
3.02 CONSTRUCTION
ENTRANCCE
F3. 0 3] CONSN 0
ROAD TSTABILIZATIONCRS __2�
3.05
SILT FENCE
SF�
F3. 0]7STORM
07
DRAIN
INLET PROTECTION
IP
3.09
TEMPORARY
DIVERSION DIKE
3.13
SEDIMENT TRAP
ST
F3.18
OUTLE-T PROTECTIONOP
F3. 19
RIPRAP
RR
F3. 3 1
SEEDING TEMPORARY
TS
---0---
[3-32.
P SE EDING MENANT
PS
---®--
[3.3]8
TREE PRESERVATION
AND PROTECTION
TP
---®--
F.39
DUST CONTROL
DC
---0--
*REFERENCE VIRGINIA EROSION AND
SEDIMENT CONTROL HANDBOOK (VESCH)
FOR DETAILS REGARDING INDIVIDUAL
CONTROL MEASURES.
PLATE. 3.13-2
TEMPORARY SEDIMENT TRAP CALCULATIONS
H
Z
WEIR
DRAINAGE
WET
VOL.
WET
VOL.
DRY
VOL.
DRY
VOL.
No.
A
B
C
(ft.)
(ft.)
LENGTH
(ft.)
AREA
(Acres)
((C j)
((Oj)
((C j)
((Y) )
4
398
401
403
3.0
1.5
18.0'
2.43
163
211
163
207
5
387
391
393
3.0
1.5
13.0'
2.18
147
155
147
148
KEYMAP
MODIFIED
SEDIMENT
TRAP #3
J.
BOUNDARY LINE INFORMATION
LINE BEARING DISTANCE
L 1 N 81 °23'05 " E 26.04 '
L2 S 29° 18'35" E 27.36'
L3 N 71 °09'25" E 27.84'
STEEP SLOPES (PRESERVED)
--------- =� 7 --
Rif
filffiNIIIIIIIII
-��
o TOTAL STORAGE PROVIDED = 418 CY \ \ �% \ N,
BOTTOM ELEV = 398.0'
ps Ts PS
TOP OF DAM ELEV = 404.0'
® MIN. WEIR LENGTH = 18'
"I N,
Rnff MU Tg
�� BELVEDERE
W�
"t ® PHASE 5B M�'
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ADDITIONAL LOC x \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
436 = ±.58 ACRES
434 IP 46
x O \ \ \
x 0A
30 \ \
#` 426 428
{'\ 424 426
DUNLORA FARM +\+ LEVEL
OFFSITE GRADING 0 4? SPREADER ®} ® \ \\\ \ \\ \ \ \ \ \
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SCALE: 1 "=30'
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SCALE:
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FILE:
WPO-2020-00034
RGA#:
8438
SHEET: A 1 1 •2 OF 18
---- -
41.
\ B/M 1 TO BE INSTALLED ON CONSTRUCTED SLOPE
\ ALONG THIS FIRE ROAD ROUTE, GREATER THAN 10
VERTICAL FEET. MATTING TO BE INSTALLED WITHIN
-
o \ 48 HOURS OF ACHIEVING FINAL GRADE.
Nb
o / \
/ \10
420
ti
PROPOSED PUBLIC
DRAINAGE EASEMENT
o
\ 1', ♦ MUD -TRAPS & CROSS SLOPE SILT FENCE MAY BE
REMOVED WHEN ROADWAY IS AT FINAL GRADE, PROPOSED TEMPORARY GRADING AND
x♦; BLANKET AND MATTING IS IN PLACE, AND COUNTY CONSTRUCTION EASEMENT �So
INSPECTORS AUTHORIZE.
ALL SLOPES GREATER THAN 3:1 MUST BE STABILIZED
PROPOSED TEMPORARY GRADING �p/�/ ♦♦ - WITH LOW MAINTENANCE VEGETATIVE GROUND COVER
AND CONSTRUCTION EASEMENT � /I ♦ � , . -
/�} ♦♦ OTHER THAN GRASS, SUCH AS KENTUCKY BLUEGRASSso to
^�
Sao
-
so 0' ...tea x�x— 4p Pv
r0 pSEME
_ x-- E
�CcE
430 \24
TEMPORARY
/� : % `� /SLOPE DRAIN.
CONSTRUCTION EASEMENT i
' ; '' 1 '
�+ �� , I /if ,♦ ALL SLOPES GREATER
--, "-,.'' .�' ��� � � � THAN 3:1 MUST BE
` �c +� `� �� �✓:%:'� �i i� ,♦ STABILIZED WITH LOW
�Dc• �� �� ,,,,�; '��,�;! ♦ MAINTENANCE VEGETATIVE
�J ' ' `=; ' -'' - ' '' , ♦ GROUND COVER OTHER
`.��X/� _- ♦ THAN GRASS, SUCH AS
SON 40 ♦, ♦♦ TUCKY BLUEGRASS
` e"a ��+/ -��G� ,♦ ,I qiGGRESHOE RING OF ' PGATESWM EASEMENT �� ROPOSED
TSD
416
�..
\ Q' ♦�% ''' �G SEE SHEET 16 �� ,♦♦ DIRECT RUNOFF FROM THE REAR OF LOTS
■ 245 THROUGH 254 TO THE EASTIING TEMPORARY SLOPE
Q�8 �� TSD I I 1 \,♦ ' _! - - - SLOPE DRAIN AT THE SOUTHEAST CORNER of THE
+/4 01K GF' S SEDIMENT TRAP. TEMPORARY SLOPE DRAINS ARE TO
�� BE CONVERTED TO 4' WIDE, 2.1 SIDE SLOPE DITCHES
Y +� �� ` �` '\'`, rn ♦ LINED WITH CLASS 1 RIP RAP.
Qb
460
4100,
\'
/✓✓ 00 \` \
i
PROPOSED TEMPORARY GRADING D �� I , - �p� ,I ; Rl�t Front Bonnet
1 ! ► A CONSTRUCTION EASEMENT I P, I�PS� �\ ti BM ELEV.= 455.10 /o
\ �� ��` �\ \ , Bolt on Hydrant , . s - " \
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SCALE: 1 "=30'
STEEP SLOPES (MANAGED)
STEEP SLOPES (PRESERVED)
BOUNDARY LINE INFORMATION
LINE
BEARING
DISTANCE
L 1
N 81 °23'05 " E
26.04 '
L2
S 29'18'35" E
27.36'
L3
N 71 °0925" E
27.84'
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CHECKED BY:
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DATE:
06-11-2020
SCALE:
1 "=30'
FILE:
wPo-2020-00034
RGA#:
8438
SHEET: A.12.2 OF 18
TEMPORARRY SEDIMENT TRAP 3
TOTAL REQUIRED BASIN STORAGE =134CY X 2.96 AC = 397 CY
TOTAL AVAILABLE BASIN STORAGE= 4,040 CY
WET 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 CL.EANOUT ELEVATION O 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
2,607
2.00
3,159
3,841
430.00
3,711
2.00
8,795
12,636
432.00
5,084
2.00
11,643
24,279
434.00
6,559
2.00
14,834
39,113
436.00
8,275
2.00
18,571
57,684
438.00
12,656
2.00
22,952
80,636
440.00
15,799
ZOO
28,455
1090091
WATERSHED SUMMARY TO POA #2
PRE DEVELOPMENT
POST DEVELOPMENT
SITE AREA = 2.68 ACRES
ITE = 2.9 AC ES
CURVE NUMBER (CN) = 65
C = 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
POST -DEVELOPMENT CONDITIONS ROUTED
1 -YR Q(PEAK) = 1.597 CFS
1-YR Q(PEAK) = 2.62 CFS
1-YR Q(PEAK) - 0.75 CFS
TIME TO PEAK = 12.03 HRS
TIME TO PEAK = 12.03 HRS
TIME TO PEAK - 12.27 HRS
VOLUME = 5,169 C U . FT
VOLUME 7,540 CU.FT
VOLUME = 1,879 CU.FT
9VAC25-870-66C: FLOOD PROTECTION - 10 YEAR
PRE -DEVELOPMENT CONDITIONS
POST -DEVELOPMENT CONDITIONS
POST -DEVELOPMENT CONDITIONS ROUTED
10-YR Q(PEAK) = 7.63 CFS
10 YR Q(PEAK) = 9.92 CFS
(TIME
10-YR Q(PEAK) = 1.53 CFS
TIME TO PEAK = 12.03 HRS
TIME TO PEAK = 12.03 HRS
TO PEAK - 12.40 HRS
VOLUME = 20,152 CU.FT
OLUME 25,966 CU.FT
VOLUME 25,957 CU.FT
ENERGY BALANCE EQUATION:
QDEVELOPED S I.F.*(QPRE-DEVELOPED* RVPRE-DEVELOPED)/RVDEVELOPED
Y DEVELOPED S I.F,* (lYR QPRE-DEVELOPED * RV PRE-DEVELOPED)/RV DEVELOPED
0.76 S 0.80* (1.597 * 0.515) / 0.680
0.75 2 5 0.97 cfs
FLOOD PROTECTION:
01iOPOST-DEVELOPED 5 Q1OPRE-DEVELOPED CURRENT CONDITIONS
PRINCI
1.53 cfs S 7.63 cfs
2 -: M�
GOAL IS TO COVER "WEIR PI
TOP t OF ORIFICE'"
HP STORM TRENCH INSTALLATION DETAIL
6"
F. ^ pCCE�S E 5
PRE -DRAINAGE AREA TO POA#2: 2.68 ac
CN = 65oo
x'�' •'♦ ♦�
oo
Tc: 100' sheet flow w/ A ELEV = 6' 8L 459' .'' �♦ `'
OF CONC. FLOW W/ ELEV. = 60' • �/ �.� . G -
Tc: 9.9 min
PRE - Q 1 year = 1.60 cis ♦• 6
PRE - Q 10 year = 7.63 cis �.♦°, ` ' I Q '' ��
01.
00
♦.♦♦ , i •,� 1, += r/0 , ♦♦♦♦ I I /
♦♦ I ♦♦ AI
♦ 1
� � r
FIRE ROAD PLAN VIEW
NARRATIVE:
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 15" PIPE WITH A 48" RISER AND ANTI -VORTEX DEVICE HAS BEEN BUILT
AND SHOWN. A PRINCIPAL SPILLWAY WEIR PLATE IS NECESSARY IN ORDER TO 2
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.
RECOMMENDED FABRICATION:
WHOLE 1" FROM TOP TO BE
USED FOR CLEMS ATTACHMENT
do UFT, THEN BOLD
(9) !r X 2ON(OR
(OR EQUALS e T ATTACHMENT (typ. OF 3)
EPDXY SEALED T
18"
12" ORIFICE ® 426.5' 12- (EX.) OUTFALL PIPE
TABLE 1. RECOMMENDED MINIMUM TRENCH WIDTHS
\
h,
MM. GONER TO
MIN. COVER TO
RIGID PAVEMENT, H
FLEXIBLE PAVEMENT, H
_.... FINAL
BACKFILL
SPRUNGLINIE
INITIAL
BACKFILL
PIPE qAM
MIN. TRENCH
WIDTH
12'
30'
(300mm)
(762mm)
t '
34'
375mm
864mm
181
39'
450mm
991mm
24"
48'
600mm
1219mrn
30
56,
750mm
1422mm
36
64"
900mm
1626mm
42"
72'
1050mm
1829man
8"
8
1200mm'
2032mm
1500mm
2438 )
�- HAUNCH TABLE 2, MINIMUM RECOMMENDED COVER BASED ON
VEHICLE LOADING CONDITIONS
4" FOR 11'.24' PIPE BEDDING
6' FOR 30'•6(1' PIPE WN TRENCH WIDTH �1 SUITABLE
(SEE TABLE) iiii FOUNDATION
NOTES:
1. ALL PIPE SYSTEMS SHALL BE INSTALLED IN ACCORDANCE WITH ASTM D2321, "STANDARD PRACTICE FOR UNDERGROUND
INSTALLATION OF THERMOPLASTIC PIPE FOR SEWERS AND OTHER GRAVITY FLOW APPLICATIONS". LATEST ADDITION,
SURFACE LIVE LOADING CONDITION
PIPE OIAM.
,1 2B
HEAVY CONSTRUCTION
(75T AXLE LOAD)'
12" - 48"
12"
48'
300mm-1200mm
(305mm)
(1219mm)
60,
24"
60-
1500mm)
(610mm)
(1524mm)
VEHICLES IN EXCESS
OF 75T MAY REQUIRE
DITIONAL COVER
WITH THE EXCEPTION THAT THE INITIAL BACKFILL MAY EXTEND TO THE CROWN OF THE PIPE. SOIL CLASSIFICATIONS TABLE 3, MAXIMUM COVER FOR ADS HP STORM PIPE, R
ARE PER THE LATEST VERSION OF ASTM D2321. CLASS IVB MATERIALS (MH. CH) AS DEFINED IN PREVIOUS VERSIONS OF
ASTM D2321 ARE NOT APPROPRIATE BACKFILL MATERIALS.
2. MEASURES SHOULD BE TAKEN TO PREVENT MIGRATION OF NATIVE FINES INTO BACKFILL MATERIAL, WHEN REQUIRED.
3. FOUNDATION: WHERE THE TRENCH BOTTOM IS UNSTABLE, THE CONTRACTOR SHALL EXCAVATE TO A DEPTH REQUIRED
BY THE ENGINEER AND REPLACE WITH 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 1. U, IN, OR IV. THE CONTRACTOR SHALL PROVIDE DOCUMENTATION FOR
MATERIAL SPECIFICATION TO ENGINEER. COMPACTION SHALL BE SPECIFIED BY THE ENGINEER IN ACCORDANCE WITH
TABLE 3 FOR THE APPLICABLE FILL HEIGHTS LISTED. UNLESS OTHERWISE NOTED BY THE ENGINEER. MINIMUM BEDDING
THICKNESS SHALL BE 4" (100mm) FOR 12',24" (300mm-600mm) DIAMETER PIPE, 6" (150mm) FOR Mr-60" (750nwrO500mm)
DIAMETER PIPE. THE MIDDLE 103 BENEATH THE PIPE INVERT SHALL BE LOOSELY PLACED. PLEASE NOTE, CLASS IV
MATERIAL HAS LIMITED APPLICATION AND CAN BE DIFFICULT TO PLACE AND COMPACT! USE ONLY WITH THE APPROVAL OF
A SOIL EXPERT.
5. INITIAL BACKFILL: SUITABLE MATERIAL SHALL BE CLASS 1, II, IN. OR IV IN THE PIPE ZONE EXTENDING TO THE CROWN OF THE
PIPE. THE CONTRACTOR SHALL PROVIDE DOCUMENTATION FOR MATERIAL SPECIFICATION TO ENGINEER. MATERIAL SHALL
BE INSTALLED AS REQUIRED IN ASTM D2321, LATEST EDITION. COMPACTION SHALL BE SPECIFIED BY THE ENGINEER IN
ACCORDANCE WITH TABLE 3 FOR THE APPLICABLE FILL HEIGHTS LISTED. PLEASE NOTE, CLASS IV MATERIAL HAS LIMITED
APPLICATION AND CAN BE DIFFICULT TO PLACE AND COMPACT' USE ONLY WITH THE APPROVAL OF A SOIL EXPERT.
6. MINIMUM COVER: MINIMUM COVER, H, IN NON -TRAFFIC APPLICATIONS (GRASS OR LANDSCAPE AREAS) IS 12" (300mm) FROM
CLASS I
CLASS 11
CLASS IIICLASS
IV
PIPE DIA
COMPACTED
95%
90%
85%
95% 1
90%
95%
12"
41
28
21
16
20
16
16
(300mm)
(12.&n)
(8.5m)
(6.4m)
(4,9m)
(6.tm)
(4,9m)
(4.9m)
16"
42
29
21
16
21
16
16
(375mm)
(12.8m)
(B.Bm)
(BAm)
(4.9m)
(6Am)
(4.9m)
(4.9m)
18,
44
30
21
16
22
17
16
(450mm)
(13Arn)
(9.1m)
(8.4m)
(4.9m)
(6.7m)
(5.2m)
(4.9m)
24-
37
26
Is
14
19
14
14
(600m(n)
(11.3m)
(7.9m)
(5.5m)
4.3m)
(5.8m)
(4.3m)
(4.3m
Nr
39
27
19
14
19
15
14
(750mm)
(II-Wn)
8.2m)
(5.8m)
4.3m)
(5.8m)
(4.6m)
(4.3m)
36"
28
20
14
10
14
it
10
(900mm)
(8.5m)
(Lim)
(4.3m)
(3.Om)
(4.3m)
(3.4m)
(3.0m)
42"
30
21
14
10
15
11
10
(1050mm)
(9.1m)
(6.4m)
(4.3m)
(3.Om)
(4.6m)
(3.4m)
(3,0m)
48"
29
20
14
9
14
10
10
(1200mm)
(&am)
(8.1m)
(4.3m)
(2.7m)
(4,3m
(3.0m)
(3.0m)
80
29
20
14
9
14
10
9
(1500mm)
(8.8m)
(6"1m)
(4.3m)
(2.7m)
(4.3m)
(3.0m)
(2.7m)
THE TOP OF PIPE TO GROUND SURFACE. ADDITIONAL COVER MAY BE REQUIRED TO PREVENT FLOTATION. FOR TRAFFIC
FILL HEIGHT TABLE GENERATED USING AASHTO SECTION 12, LOAD
APPLICATIONS; CLASS I OR 11 MATERIAL COMPACTED TO 90% SPD AND CLASS III COMPACTED TO 95% SPD IS REQUIRED.
RESISTANCE FACTOR DESIGN (LRFO) PROCEDURE WITH THE FOLLOWING
FOR TRAFFIC APPLICATIONS. MINIMUM COVER, H. IS 12" (3ODmm) UP TO 48" (1200mm) DIAMETER PIPE AND 24' (600mm) OF
ASSUMPTIONS:
COVER FOR 60' (1500mn) DIAMETER PIPE, MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE PAVEMENT
NO HYDROSTATIC PRESSURE
OR TO TOP OF RIM PAVEMENT.
UNIT WEIGHT OF SOIL (Ya) ■ 120 PCF
7. FOR ADDITIONAL INFORMATION SEE TECHNICAL NOTE 2.D4.
REV. MAXIMUM COVER HEIGHTS
RIND
o1n a 1T
of .mw.w
REV.
DESCRIPTION
BY
I mmc-..'YY
_Hw'D
.ADVANCED DMINAGE SYSTEMS. INC. ('ADS') HAS PREPARED THIS DETAIL BASED ON INFORMATION PROVIDED TO ADS. THIS DRAWING IS
- JAB
INTENDED TO DEPICT THE COMPONENTS AS REQUESTED. ADS HAS NOT PERFORMED ANY ENGINEERING OR DESIGN SERVICES FOR TI.S
w
01R9�V9
PROJECT, NOR HAS ADS INDEPENDENTLY VERIFIED THE INFORMATION SUPPLIED. THE INSTALLATION DETAILS PROVIDED HEREINARE (GENERAL
TRENCH INSTALLATION
'640 TNUEMAN SLUG
illim
COMMENDATIONS AND ARE NOT SPECM-lC FOR THIS PROJECT. THE DESIGN ENGINEER SHALL REVIEW THESE DETAILS PRIOR TO
D�AIL (HP STORY)
HILLIARD. OHIO 43028
I
CONSTRUCTION. IT IS THE DESIGN ENGINEERS RESPONSIBILITY TO ENSURE THE DETAILS PROVIDED HEREIN MEETS OR EXCEEDS THE
ON
•
NTS
APPl1CAKE NATIONAL STATE, OR LOCAL REOUMREMENTS AND TO ENSURE THAT THE DETAILS PROVIDED HEREIN ARE ACCEPTABLE FOR THIS
rtwrr
DRAWING NUMBER: STD-101D
+�+".,� u.N".s e.a,�.s 1rr_
1 OF t
L
EROSION CONTROL PHASE
C
1' 1.5'
2.5'
COARSE AGGREGATE
24"
ELEV = 429.00
3' HIGH
ELEV = 426.00
CLASS I RIPRAP
"r HOLE 1" FROM
SIDE WALL FOR
BOLTS (TYP. OF 6)
WM- PLATE TO BE ARCHED TO FIT EXTERIOR
RADIUS OF A STO. 4 FT. MANHOLE
24"
455
450
445
440
435
430
425
420
415
410
405
400
395
94
WE
POA
ram_ 20' PUBLIC DRAINAGE &
j- MAINTENANCE EASEMENT
REVERSE SLOPE BENCH
M EASEMENT
�\Pollyr
___ -_ ••M•:r►„� 40' ACCESS EASEME M1AR TOM
FKKnW VIA 0L LV WT:
To *An*16CN=09
- `-
♦ _ --- _ 1,\\�/ ,,, .,.�i\\ r \\B "s 1. Hr �
� a 1 :1 1 :1 •1 �/
-1 1 111 ■ ■ ■ ■ ■
FIRE ROAD PIPE PROFILE
HORIZ. SCALE: 1 "=30'
VERTICAL SCALE: 1 "=10'
A
455
i
7
3
x
W
W
uj
OF�P
-FI OAD
-
DAM = 444.00
I
I
I.
Q
PROPOSED FIRE
z-
ACCESS ROAD
FINISHED GRADE
WITH REVERSE
SLOPE BENCH
-------------- -
'
I
I
�
II
�N jvlZI
- EXISTING GRADE
- - ----- -
-1-
_70��-
16
Imo'
11 +00
75 10+00
12
)SPECIFICATIONS
OUTLET PROTECTION
VDOT EW-1 HEADWALL
15" HP PIPE
I
Q1 = 0.75 cfs
2 Q2 = 1.00 cfs
Q10 = 1.53 cfs
450
445
440
35
AS-BULT 48" RISER CREST
30 ELEVATION AT 432.50'
425
420
BASIN BOTTOM do STABILIZED
FINISHED GRADE = 426.50.
41 RISER TO HAVE STEEL PLATE
COVER THE BOTTOM HALF OF
THE 12" LOW FLOW ORIFICE AT
41 ELEVATION 426.5 WHICH
SATISFIES THE ENERGY BALANC
REQUIREMENTS. TRASH RACK T
40 BE INSTALLED OVER ORIFICE
400
395
00
OUTLET PROTECTION IS SIZE IN ACCORDANCE
WITH PLATE 3.18-3 OF THE VIRGINIA EROSION
CONTROL MANUAL.
3Do = 15" * 3 = 3.75'
La = 8.5' MIN
W = Do + La = 1.25 + 8.5 = 9.75' *DESIGN
ENGINEER RECOMMENDS FULL CHANNEL WIDTH
MIN 8.5'
CL I RIPRAP
STANDARD EC-1 CLASS 1
REQUIRED TYPE A INSTALLATION
OUTLET PROTECTION
T
EC-1 CLASS I
n
I"'
RIPRAP
Z
Z
24" MIN. DEPTH
Z
W/UNDERLYING F.F
J
J
Li
MIN DEPTH OF
RIPRAP = 24"
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DRAFTER:
DEG
DESIGNER:
DEG
PRODUCTION: JLT
op
pr��
o{��sLZH
r
i
cj
Jimmy L Taggart
UC. NO.
0j 1 4,,2023
BIONAL t�
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CE
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Ir
DATE:
07-1-2020
SCALE:
NA
FILE:
WPO-2020-00034
RGA#:
8438
-
18.2 SI•fEET.A
OF 18