20140209 Ver 1_SMP 7 Bio#1 REVISED_20210412

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DETAINING
WALL (<2')
CLEAN -OUT
(TYPICAL)
4" PVC
(TYPICAL)
26�
BOTTOM SURFACE
AREA = 2,376 SF
(ELEV.=323.0)
20'1-016\ SAN.
SEWER EASE
Pvc°
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:WETLANDS
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Fl
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11
1
',EIV OVE EX. 1 5" `\
EES $ INSTALL
HEADWALL
INV.=323.5G (±)
FO�EBAY
'ETAI N I N G
WALL (<3')
\
\
\
\
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STO*WWATE� BMP
ACCESS * MAINTENANCE
EASEMENT
TOP Of BEAM
325.5
EM€RG NCY SPILLWAY
_EWER eENCY
5-PILL-WA DITCH
5'x5' RIP- SAP
PAD (D5o=G")
1-
For cr=l appllcatieoe, or ea
directed by geotechnirai enpkleer
-when &hi co:Atkins require,
piece drainage orpopeelle.
P1kan r1WN (or equlreIont)
tnsleller t, 2/3 wan help hI
arsl 30% coverage.
4" perforated PVC Dra€nape Ti..'le.. .
oulJet every 5C' J.C.
(when See Coneltions FereA el
See nate below.
Pe
rid
4" Ferreratad PVC or
IMPS Drainage Tlie.
Ctuet every 5 ' 0.C,
Note;
Aa elm:led by enploevr whoa Co corehborte require, wrap
itrishsapli, 111 W. or ALir YRiehod rltrxte end Sea. lacnloayvan Pier
febdo rive stem wild drek+ape 09411patlt or apiiittGecbi Cede dr ain
mil•
I1plcai Reinforced Wall SeCtlan____
n
Cap Uf1Rt
Goit Jokye F5I
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Rock C.r $181*)
thireinforG4
t47' Crhelte€l
Levollop Ike.
Note;
BOIL SEARING CAPACITY OF
3,000 PSF IS ASSUMED
NOTES:
1. RETAINING WALLS MUST BE A MEDIUM OR DARK BROWN OR RUST COLOR.
2. RETAINING WALL DETAIL REPRESENTS THE WALL TYPE TO BE USED AT THIS 5CM.
i
BIOETENTION LAYOUT:
STANDARD COSS-SECTION
PERMENANT
CLEANOUT POST W/
CLEANOUT MARK
BOTTOM AND
SLOPES STABILIZED CAPPED CLEAN
WITH BERMUDA OUT PIPE
SOD
2" PONDING
I- ---11 1
FILL SOIL MEDIA
MIX: 85-8,5% SAND,
8-1 2% FINES,
3-5% ORGANIC
DEPTH TREES/SHRUBS=3ft.
GRASS= 2ft.
4 WASHED SAND
21+ DISTANCE
TO WATER
TABLE
-UNDERDRAIN_
-FILTER FABRIC -
(OR CHOKING -
ITIN)
II III -
-WATER TABLE-
•
BIORETENTION AREA
DESIGN
MINIMUM WEIR
LENGTH (FT)
10
UNDERDRAIN PIPE
DIAMETER (IN)
4
MINIMUM NUMBER OF
UNDERDRAIN PIPES
2
CLEANOUT
ELEVATION (FT)
323.25
TOP OF BIORETENTION
SOIL MIXTURE ELEV. (FT)
323.00
BOTTOM OF BIORETENTION
SOIL MIXTURE ELEV. (FT)
321.00
SPILLWAY (WEIR)
ELEVATION (FT)
324.50
TOP OF BERM
ELEVATION (FT)
325.50
MINIMUM
DEPTH= 12"
%/
RIP -RAP
D5o= 6" -••
ii�i
BOTTOM WIDTH = 2'
WITH GEOTEXTILE LINER
EXISTING
GROUND
EMERGENCY SPILLWAY DITCH DETAIL
N.T.S.
UNDERDRAIN PIPE SHALL BE SCHEDULE 40 PVC,
SDR35, OR SMOOTH WALL CORRUGATED PLASTIC
PIPE WITH %" PERFORATIONS AT G" ON CENTER (4
HOLES PER ROW) REFER TO TABLE FOR PIPE SIZE.
12
///� j/\ /\//\\//\\//\\\.1/\\/ \//\//\ .\/ ////V1
BIORETENTION SOIL
CLASS "C"
GEOTEXTILE
FABRIC AROUND
WASHED STONE
#57 STONE
UNDERDRAIN PIPE
TO BE INSTALLED AT
0.5% MIN. SLOPE
NATIVE SOIL, NO
COMPACTION
UNDEKDRAIN CROSS SECTION (NTS)
WALL rviry
ENGINEERED FILL
MATERIAL
HDP
CLEAENOUT
100-YEARSTORM EL=325.0
I'9Y I 0-YEAR STORM EL - 324.8
I -YEAR STORM EL - 324.6
TOP OF
BIORETENTION
POND
BOTTOM OF -
ENGINEERED FILL
MATERIAL
PERMEABLE FILTER
FABRIC LINING ENTIRE
BIORETENTION CELL
WASHED 57 STONE
ENVELOPE
UNUNED SLOTTED
HDPE UNDERDRAIN
PERMEABLE FILTER
FABRIC OVER ENVELOPE
TOP OF EARTH DAM
EL - 325.5
TOP OF EMERGENCY SPILLWAY
EL = 324.5
OUTLET PIPE
INVERT OUT
BIO-RETENTION BMP CROSS-SECTION (N.T.5.)
BIORETENTION SOIL NOTES:
03/09/21 REVISION:
THE PURPOSE OF THIS REVISION IS TO APPROVE THE GRADING AND
RETAINING WALLS NECESSARY TO PROVIDE 3: I INTERIOR SLOPES FOR
THE SCM. THE SCM DESIGN PARAMETERS SHALL BE CONFIRMED BY
THE CONTRACTOR FOR CERTIFICATION. ANY LANDSCAPING PLANTINGS
IMPACTED BY GRADING SHALL BE REPLACED.
NOTES:
I . ALL MATERJALS AND METHODS OF CONSTRUCTION SHALL BE IN ACCORDANCE
WITH TOWN OF APEX STANDARDS AND SPECIFICATIONS.
2. BOUNDARY TAKEN FROM A DIGITAL FILE PROVIDED BY BARRY SCOTT SURVEY
COMPANY.
3. TOPOGRAPHIC INFORMATION TAKEN FROM WAKE COUNTY GIS FILES.
4. THIS SITE HAS BEEN REVIEWED FOR WETLANDS AND STREAM BUFFERS BY
ENVIRONMENTAL SERVICES INC. AND THE DELINEATED ENVIRONMENTAL FEATURES
HAVE BEEN SHOWN.
5. PER FEMA MAP #37200721 OOJ DATED 02 MAY 200G, NO 100-YEAR
FLOODPLAIN TRAVERSES THE PROPERTY.
6. CONTRACTOR SHALL HAVE NORTH CAROLINA ONE CALL (I-800-632-4949)
LOCATE ALL EXISTING UTILITIES PRIOR TO BEGINNING CONSTRUCTION.
7. THIS SITE I5 LOCATED WITHIN THE PRIMARY WATERSHED PROTECTION
OVERLAY DISTRICT.
8. THE BIO-RETENTION AREA SHALL BE LOCATED WITHIN A DRAINAGE EASEMENT
WITH ACCESS TO A PUBLIC RNJ.
9. THE BACKFILL OF THE 4-INCH OUTLET PIPES FROM THE BIO-RETENTION CELLS
SHALL BE COMPACTED TO A MINIMUM OF 95% OF STANDARD PROCTOR
(ASTM D698).
I O. RETAINING WALLS SHALL BE SEGMENTED BLOCK TINTED MEDIUM OR DARK
BROWN OR RUST IN COLOR. ALL PERMITTING WILL BE HANDLED AS A
SEPARATE SUBMTTAL.
I I . FENCING SHALL BE INSTALLED AT THE TOP OF RETAINING WALLS IF REQUIRED
BY THE BUILDING CODE.
1 2. CONTRACTOR SHALL CONFIRM THAT FILL SOILS USED FOR 5CM
CONSTRUCTION HAVE BEEN ADQUATELY COMPACTED.
BIOETENTI ON CELL: EOREDAY DETAIL
GRASS
L W L J. W ,M W
II
CLASS B RIP -RAP
DSO= 1311
30"
///\\//�\/
OUTLET
PIPE
REFER TO GRADING
PLAN FOR TOP OF
DAM ELEVATION
\I/
\I/
5' WEIR LENGTH �_
REFER TO GRADING
PLAN FOR SPILLWAY
ELEVATION
I/ \I/ \I/ \I/ \I
\// //,>- //!//f/ ///;/;f/f/•
SPILLWAY BOTTOM AND
SLOPES TO BE STABILIZED
WITH PERMANENT EROSION
CONTROL MAT
PERMANENT EROSION MAT TO BE
P-300 BY NORTH AMERICAN GREEN,
MIRAMAT BY MIFAFI CORP., OR
APPROVED EQUAL
SECTION THROUGH SPILLWAY (NTS)
STRUCTURAL BMP CONSTRUCTION SEQUENCE:
THE FOLLOWING MUST OCCUR PRIOR TO FINAL PLAT AND/OR CERTIFICATE OF OCCUPANCY (CO):
I . ALL STRUCTURAL BMPS MUST BE INSTALLED IN ACCORDANCE WITH THE APPROVED CONSTRUCTION DRAWINGS.
2. THE DESIGN ENGINEER MUST SUBMIT AN AS -BUILT PACKAGE WHICH MEETS ALL REQUIREMENTS PRESENTED IN THE
TOWN SPEC BOOK INCLUDING A SIGNED AND SEALED CERTIFICATION STATEMENT.
3. SUBMIT THE APPROPRIATE SIGNED STRUCTURAL BMP OEM AGREEMENT AND MAINTENANCE GUARANTEE TO THE
DEVELOPMENT PROJECTS COORDINATOR IN CONSTRUCTION MANAGEMENT AT 249-3394.
4. A FINAL INSPECTION BY THE ENVIRONMENTAL PROGRAMS MANAGER SHALL BE CONDUCTED ONCE THE AS -BUILT
SUBMITTAL HAS BEEN RECEIVED. ONCE APPROVED, THE ENVIRONMENTAL PROGRAMS MANAGER WILL SEND A BMP
APPROVAL LETTER TO THE OWNER.
5. IN LIEU OF STRUCTURAL BMP COMPLETION AND FINAL APPROVAL BY THE ENVIRONMENTAL PROGRAMS MANAGER, THE
TOWN MAY ACCEPT A PERFORMANCE GUARANTEE IN ACCORDANCE WITH UDO SECTION 6. 1 . 1 2(G). IF THE CONTRIBUTING
DRAINAGE AREA FOR THE BMPS 15 UNSTABLE AT THE TIME OF FINAL PLAT APPROVAL FOR A SUBDIVISION, THE TOWN
WILL ALLOW A SKIMMER SYSTEM TO BE CONNECTED TO THE EMERGENCY DRAIN SIZED TO DE -WATER THE VOLUME OF
THE BASIN OVER A 2-3 DAY PERIOD. POROUS BAFFLES SHALL EITHER CONTINUE TO BE MAINTAINED (IF CONVERTING
FROM A SEDIMENT BASIN) OR BE INSTALLED. ANY ORIFICES MUST BE CAPPED OR PLUGGED.
6. ALL STRUCTURAL BMPS ARE REQUIRED TO BE COMPLETED PRIOR TO A FINAL CO FOR A SITE PLAN AND ISSUANCE OF
90% OF COS WITHIN A SUBDIVISION. IF THE SUBDIVISION 15 TO BE PHASED, ALL STRUCTURAL BMPS SHALL BE
COMPLETED PRIOR TO ISSUANCE OF 90% OF COS WITHIN THAT PHASE.
7. IF A STRUCTURAL BMP COUNTS TOWARDS RCA, THE REQUIRED LANDSCAPING SHALL BE INSTALLED DURING THE
APPROPRIATE GROWING SEASON AND COORDINATED WITH THE TOWN ZONING COMPLIANCE OFFICER AT 249-3426.
BIORETENTION SOIL MIXTURE (DSM): SHALL BE PLACED AND GRADED USING LOW GROUND -CONTACT PRESSURE
EQUIPMENT OR BY EXCAVATORS AND/OR BACKHOES OPERATING ON THE GROUND ADJACENT TO THE BIORETENTION
FACILITY. NO HEAVY EQUIPMENT SHALL BE USED WITHIN THE PERIMETER OF THE BIORETENTION FACILITY BEFORE,
DURING, OR AFTER THE PLACEMENT OF THE BSM. THE DSM SHALL BE PLACED IN HORIZONTAL LAYERS NOT TO
EXCEED 12 INCHES FOR THE ENTIRE AREA OF THE BIORETENTION FACILITY. THE DSM SHALL BE COMPACTED BY
SATURATING THE ENTIRE AREA OF THE BIORETENTION FACILITY AFTER EACH LIFT OF DSM 15 PLACED UNTIL WATER
FLOWS FROM THE UNDERDRAIN. WATER FOR SATURATION SHALL BE APPLIED BY SPRAYING OR SPRINKLING. AN
APPROPRIATE SEDIMENT CONTROL DEVICE SHALL BE USED TO TREAT ANY SEDIMENT -LADEN WATER DISCHARGED
FROM THE UNDERDRAIN. IF THE DSM BECOMES CONTAMINATED DURING THE CONSTRUCTION OF THE FACILITY, THE
CONTAMINATED MATERIAL SHALL BE REMOVED AND REPLACED WITH UNCONTAMINATED MATERIAL AT NO ADDITIONAL
COST TO THE ADMINISTRATION. FINAL GRADING OF THE BSM SHALL BE PERFORMED AFTER A 24-HOUR SETTLING
PERIOD. FINAL ELEVATIONS SHALL BE WITHIN 2 INCHES OF ELEVATIONS SHOWN ON THE CONTACT PLANS.
THE BIORETENTION SOIL MIXTURE (BSM) SHALL BE A UNIFORM MIX, FREE OF STONES, STUMPS, ROOTS, OR OTHER
SIMILAR OBJECTS LARGER THAN 2 INCHES EXCLUDING MULCH. NO OTHER MATERIALS OR SUBSTANCES SHALL BE
MIXED OR DUMPED WITHIN THE BIORETENTION AREA THAT MAY BE HARMFUL TO PLANT GROWTH, OR PROVE A
HINDRANCE TO THE PLANTING OR MAINTENANCE OPERATIONS.
PRIOR TO PLACING THE UNDERDRAIN AND THE BSM, THE BOTTOM OF THE EXCAVATION SHALL BE ROTO-TILLED TO A
MINIMUM DEPTH OF 6 INCHES TO ALLEVIATE ANY COMPACTION OF THE FACILITY BOTTOM. ANY SUBSTITUTE
METHOD FOR ROTO-TILLING MUST BE APPROVED BY THE ENGINEER PRIOR TO USE. ANY PONDED WATER SHALL BE
REMOVED FROM THE BOTTOM OF THE FACILITY AND THE SOIL SHALL BE FRIABLE BEFORE ROTO-TILLING.
0
5
10
GRAPHIC SCALE
20
THE SIGNATURES AFFIXED BELOW CERTIFY THAT THIS SHEET HAS BEEN REVIEWED AND APPROVED SOLELY
PER THE CERTIFICATIONS SIGNED ON THE COVER SHEET OF THESE CONSTRUCTION PLANS.
N/A
Melton 04/13/2021 5.03.22 PM
PW - TRANSPORTATION
N/A
sewens 04/19/2021 8:27:52 AM
BUILDING INSPECTION
Approved
jrlillon 04/19/2021 10:29:28 AM
WR - UTILITY ENGINEERING
N/A
rsmith 04/12/2021 2:01:16 PM
ELECTRIC
N/A
WR - 5 * E
Approved
Pol„04,12/.214:20.9
DATE WR - STORMWATER
Approved
abunce 04/12/2021 211:30 PM
DATE PLANNING
,.e N/,. ,eM".2"AM
DATE PLANNING - TRANSPORTATION
N/A
khue9erich 04/12/2021 3:20:31 PM
DATE FIRE
N/A
areincke 04/12/2021 1:21:56 PM
DATE
DATE
DATE
DATE
DATE PARKS, RECREATION $ CULTURAL RES, DATE
N EERI NG, PLLC
V
Z
W
Construction Management
221 N. SALEM ST,
SUITE 001
PO BOX 1062
APEX, NC 27502
Office: 919-387-1174
Registration: P-0151
www.jonesalossen.com
2 0 _Q���S'SF/r08y.�.
SEA
D.
0
CONSTRUCTION DRAWINGS
WAKE COUNTY, NORTH CAROLINA
TOWN Of APEX
SCALE
111
0
En
DRAWN
DATE
REVISION
03/13/14
1 st TRC COMMENTS
04/1 7/1 5
510-AREA GRADING
GRADING REVISION
TRC COMMENTS
TRC COMMENTS
SHEET
7
PROJECT
DESIRED BIORETENTION SOIL MIXTURE PH LIES BETWEEN 5.5 AND 6.5.