20150609 Ver 1_Stormwater Site Plans_20150619

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BMP #1 -WET POND 111= 201
GRAPHIC SCALE
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20 0 10 20 40
E-
1 inch = 20 ft. O
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CLAY LINER SPECIFICATIONS
CLAY LINER SHALL MEET THE FOLLOWING SPECIFICATIONS:
• MINIMUM 12" THICKNESS WITH UNIFIED SOIL CLASSIFICATION SYSTEM
DESIGNATION OF CL, CH, ML, SC
• MINIMUM OF 40% PASSING #200 SIEVE
• MINIMUM PLASTICITY INDEX OF 12
• MAXIMUM INFILTRATION RATE OF 0.01 IN /HR.
• CONTRACTOR SHALL COMPLETE A MINIMUM 2 TESTS OF EACH ABOVE
PARAMETER ON LINER MATERIAL AND PROVIDE TO ENGINEER FOR
APPROVAL.
• MINIMUM 93% COMPACTION PER ASTM D698 WITHIN 3% OF OPTIMUM
MOISTURE CONTENT (1 DENSITY TEST PER 2,500 SF)
CLAY LINER SHALL BE PLACED AT BMP BOTTOM WITH A MINIMUM OF 8" OF
TOPSOIL FOR FINISHED GRADE AS SHOWN ON PLANS. CARE SHALL BE TAKEN
WHEN TRACKING IN TOPSOIL TO NOT PUNCTURE OR DAMAGE CLAY. A CLAY /SOIL
MIXTURE MAY BE USED IF THE ABOVE SPECIFICATIONS ARE SATISFIED AND WITH
WRITTEN APPROVAL BY THE ENGINEER.
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/ VARIABLE WIDTH BMP /
/ / I MAINT ,NANCE E SEMENT
/ I
300
1 ,
START OF
�TREAM
'CHANNEL
UTILIT
,EM
NOTES:
1. RISER BARREL, SKIMMER AND OUTLET PIPE SHALL BE INSTALLED AT PRIOR
TO THE BEGINNING OF OVERALL SITE GRADING AND SHALL BE UTILIZED AS
A SEDIMENT CONTROL DEVICE DURING ROADWAY AND UTILITY
CONSTRUCTION, ONCE THE SITE HAS BEEN STABILIZED AND GRADING IS
COMPLETED THE BASIN SHALL BE CLEANED OUT AND STABILIZED. THE
SKIMMER DEVICE SHALL BE REMOVED, THE BOTTOM DRAIN CLOSED AND THE
NORMAL POOL ESTABLISHED.
2. DAM EMBANKMENT AND ALL SLOPES SHALL BE STABILIZED PER EROSION
CONTROL SEEDING SCHEDULE OR SOD AS DESCRIBED ON SHEET C7.2.
3. ALL CONSTRUCTION TO BE IN ACCORDANCE WITH ALL TOWN OF APEX
STANDARDS. ALL APPLICABLE LOCAL AND STATE ENVIRONMENTAL PERMITS
SHALL BE OBTAINED PRIOR TO START OF CONSTRUCTION.
4. STORMWATER MANAGEMENT FACILITIES SHALL BE DESIGNED PER THE TOWN
OF APEX STANDARDS AND REGULATIONS FOR STORMWATER QUANTITY AND
QUALITY (UDO SECTION 6.1). POST DEVELOPMENT RATES FOR THE 1 —YEAR
AND 10 —YEAR, 24 —HOUR STORMS.
NORMAL POOL
POND BOTTOM
PERMANENT POOL VOLUME
TOP OF BERM
100 —YEAR WATER SURFACE
DRAWDOWN ORIFICE*
PEAK ATTENUATION ORIFICE
RISER CREST
OUTLET PIPE INVERT @ RISER
OUTLET PIPE INVERT @ FES
ANTI — FLOTATION
BMP #1
DIMENSIONS ELEV.
26,014 SF
306.00
= 800 PLANTS
300.00
11 1,500 CF
KEY BOTANICAL NAME
10 FEET WIDE
312.00
CALIPER
311.05
3.5" PVC
305.00
3 - 4'W x 6 "H
308.00
5' ID x 5' ID
310.00
87 LF 42" RCP
300.00
@ 0.6%
268.50
8' x 8' x 2.5'
WORKS - ELECTRIC
SHALLOW WATER (NORMAL POOL TO 6" BELOW)
= 3,200 SF 50 HERB. PLANTS / 200 SF
= 800 PLANTS
PLANT TYPE
QTY
KEY BOTANICAL NAME
COMMON NAME
ROOT
CALIPER
HEIGHT NOTES
CM -
90
Acorus calamus
Sweet Flag
CONT.
1 Gal.
24" O.C.
HERBACEOUS
FIRE
DATE
PUBLIC
WORKS - ELECTRIC
DATE
PARKS, RECREATION & CULTURAL RES
DATE
47
Acorus calamus 'Variegata'
Variegated Sweet Flag
CONT.
1 Gal.
24" O.C.
0
47
185
Peltandra virginica
Pontedaria cordata
Arrow arum
Pickerelweed
CONT.
CONT.
1 Gal.
4" Pot
24" O.C.
24" O.C.
81
Sagittaria latifolia
Broadleaf Arrowhead
CONT.
1 Gal.
24" O.C.
(� U
185
Saururus cernuus
Lizard's Tail
CONT.
4" Pot
24" O.C.
165
Schoenoplectus tabernaemontani
Softstem Bulrush
CONT.
4" Pot
24" O.C.
SHALLOW LAND (NORMAL
POOL TO 6" ABOVE) =
3,280 SF 50 HERB.
PLANTS
/ 200 SF
= 820 PLANTS
PLANT TYPE
QTY
KEY BOTANICAL NAME
COMMON NAME
ROOT
CALIPER
HEIGHT NOTES
110
Carex stricta
Tussock Sedge
CONT.
4" Pot
24" O.C.
HERBACEOUS
110
Iris versicolor
Northern Blue Flag Iris
CONT.
4" Pot
24" O.C.
195
Iris virginica
Southern Blue Flag Iris
CONT.
4" Pot
24" O.C.
WEENA
175
luncus effusus
Soft Rush
CONT.
4" Pot
24" O.C.
Z
110
Lobelia cardinalis
Cardinal Flower
CONT.
4" Pot
24" O.C.
120
Scirpus cyperinus
Woolgrass
CONT.
1 Gal.
24" O.C.
PLANTING REQUIREMENTS - BMP #1
ALL SHRUBS SHALL BE 24" MINIMUM HEIGHT AND 3- GALLON CONTAINER SIZE AT INSTALLATION
TEMPORARY POOL RISER TOP
DURING STORM
TEMPORARY SKIMMER TOP OF DAM
L J
6.. PEAK FLOW ATTENUATION POOL RISER >'
FOREBAY \ NORMAL POOL 10:1
r? Z 10' WIDE VEGETATED SHELF TO
PERMANENT 10' EXTEND TO A DEPTH OF 6" ABOVE
— POOL DEPTH I VEGETATED AND BELOW THE PERMANENT POOL
— I
SHELF
I El EARTH DAM
° °
SEDIMENT STORAGE EL i t —III I I l
I' ABOVE POND BOTTOM
ANTI- FLOATATION DEVICE III
6" DIP —
FOREBAY
DRAIN , i l I I
ANTI -SEEP COLLAR I I . ,III I I -
BMP #1 CROSS SECTION RCP O-RING CLASS III
NTS.
6" PRECAST CONCRETE
TOP SLAB W /GRATE
EL. 311.75
EL. 310.00 115" VOID SPACE
PEAK
I l ATTENUATION WEIR
3 - 4'x6"
308.00
DRAWDOWN EL.
305.00
(TURN UP 1' INSIDE
" C STRUCTURE TO
6
ESTABLISH NORMAL
POOL AT 306.00)
42" RCP
EL. 300.0►1 6" D BOTTOM DRAIN
EL. 300.25
BAST WALL NORTH & SOUTH WALS WEST WALL
BMP #1 RISER WALL ELEVATIONS
NTS
GRATED COVER ACCESS
TOP OF RISER
HAND WHEEL 6" SLAB TOP
I / STAINLESS STEEL STEM
RISER CREST SUPPORTS AT 3' O.C.
PRECAST REINFORCED
—BOX 6" THICK SIDEWALL
(MIN)
i� MANHOLE STEPS
6" PVC (SEE NCDOT 840.66)
OPEN
NORMAL POOL TOP 114 "x 2" STEEL STRAP
0 -RING' JOINT W/ 2 - 314" ANCHOR
—� y t BOLTS 2 STRAPS REO'D
6" PVC TEE----.___ � GROUT EACH SIDE
6" PVC
A
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ORIFICE HOLE DRILLED CAP
IN 6" PVC CAP � JOINT SEALED WITH A -LOK NEOPRENE
GASKET (OR APPROVED EQUAL)
6" DIP CAST IN MANHOLE WALL
POND BOTTOM 1 I CLASS 11 10 -RING RCP
WV. OUT
PAVED INVERT 16" GROUT —
�� / • •• ° U •• TOP OF ANTI- FLOATATION
a•
. a
a .
a_
4" NRS GATE VALVE
(SET IN GROUT)
BMP #1 RISER DETAIL
NTS
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6' -4"
5'
I �
c� I
GRATE OFFSET
OVER STEPS
BMP #1 RISER TOP DETAIL
NTS
#4 REBAR
12" O.C.
/ EACH WAY
I / I
I
-- I 4.5'
ELEVATION
1/2" PREFORMED
JOINT FILLER,
12" WIDE
i 1
2000 PSF MIN.
8 BEARING CAPACITY
BENEATH COLLAR
SECTION
i
ANTI -SEEP COLLAR
NTS
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.
CM -
ENGINEERING
DATE
PUBLIC WORKS - ENV. PROGRAMS
DATE
CM -
TRANSPORTATION
DATE
PLANNING
DATE
CM -
BUILDING INSPECTIONS
DATE
PLANNING - TRANSPORTATION
DATE
PUBLIC
WORKS - WATER /SEWER
DATE
FIRE
DATE
PUBLIC
WORKS - ELECTRIC
DATE
PARKS, RECREATION & CULTURAL RES
DATE
PUBLIC
WORKS - S & E
DATE
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