20140759 Ver 1_Site Plan_20140923 (5)

VELOCITY REDUCTION PADS
OUTLET
#
PIPE SIZE
(IN.)
ROCK SIZE
(IN.)
ZONE
ROCK CLASS
LENGTH L
(FT.)
WIDTH W
(FT.)
DEPTH
(IN.)
VELOCITY
V10
31
30
25
3
1
7.5
7.5
24
17.7
OS2
36
12
2
B
9
9
1 24
9.5
EXISTING
GROUND
OS2A RIP-RAP OUTLET DETAIL
N. T. S.
SIDE C
d
• i 11111 -
DRAWDOWN PIPE
OUTLET PIPE, SIZE
/-AND MATERIAL
PER DRAINAGE
SCHEDULE
0
GATE VALVE
M
AND POND a
DRAIN, SIZE -8" 0
U5
OUTLET STRUCTURE GENERAL NOTES
1. OUTLET STRUCTURE ELEVATIONS SHOWN ON THE DETAILS ON THIS SHEET
ARE CRITICAL AND MUST BE WITHIN 0.02' OF THAT SHOWN. IF OUTLET STRUCTURES
ARE PRE -CAST OFF -SITE, THE HOLE FOR THE OUTLET PIPE SHALL BE ENLARGED TO
ALLOW UP TO 0.3' OF VERTICAL MOVEMENT. WHEN INSTALLED, THE EXCESS OPENING
SHALL BE FILLED WITH GROUT.
2. THE OUTLET STRUCTURE SHALL HAVE A TRASH RACK COVERING THE OPENINGS. SUCH TRASH
RACK SHALL BE 6" OUT FROM THE OPENING AND SHALL HAVE A MAXIMUM OPENING OF 6 "x6 ". IT
SHALL BE SECURELY FASTENED TO THE STRUCTURE BUT REMOVEABLE FOR MAINTENANCE.
3. OUTLET PIPES SHALL HAVE AN ANTI -SEEP COLLAR OF CONCRETE LOCATED APPROXIMATELY
UNDER THE MIDDLE OF THE DAM IN WHICH IT IS LOCATED. IT SHALL CONSIST OF CONCRETE
POURED AROUND THE PIPE IN A VERTICAL DIRECTION. THE COLLAR SHALL BE A SQUARE 8"
THICK AND SHALL EXTEND 18" BEYOND THE OUTSIDE OF THE PIPE IN EACH DIRECTION.
4. TREATMENT OUTLET PIPE SHALL NOT BE PVC BUT OTHER MATERIAL SUCH AS GSP WHICH IS
NOT SUBJECT TO DETERIORATION IN SUNLIGHT.
POND NOTES
1. SEE SHEET 2 FOR BMP CONVERSION SEQUENCE.
2. FOREBAY DIVIDERS ARE TO BE INSTALLED WHILE CONVERTING FROM SEDIMENT BASIN
TO WET POND.
3. GROUND WATER NOT ENCOUNTERED.
7 1 10'
TREATMENT VOLUME ELEVATION- 389.8
10 YR. STORM ELEV. 390.7
----- � - -_ -- FREEBOARD 1.3
NORMAL POOL -388.5 10'
FOREBAY _ FOREBAY DIVIDER --
BOTTOM OF FOREBAY -
1' CLAY LINER
TRASH RACK DETAIL
N.T.S.
'- #57 STONE TOPPED
BY CLASS B RIP -RAP
RETENTION POND CROSS- SECTION
NOT TO SCALE
6"
s" s"
TRASH RACK
OUTLET
STRUCTURE
TRASH RACK NOTES
1. TRASH RACK SHALL BE 6 CLEAR OF STRUCTURE TOP AND
SIDES. BOTTOM SHALL BE 1" OR MORE BELOW SLOT. THE
TRASH RACK NEED NOT COVER THE TREATMENT OUTLET
PIPE.
2. TRASH RACK SHALL BE FASTENED TO EACH SIDE OF THE
STRUCTURE AT AT LEAST 2 POINTS. IT SHALL BE EASILY
REMOVED FOR MAINTENANCE OR ENTRY INTO THE
STRUCTURE.
3. TRASH RACK SHALL ACCOMMODATE VALVE SHAFT THOUGH
AN OPENING.
4. TRASH RACK SHALL BE MADE OF DURABLE
MATERIAL WHICH WILL NOT RUST OR DETERIORATE IN
SUNLIGHT AND IS ACCEPTABLE TO THE TOWN OF HOLLY
SPRINGS.
5. MAX. OPENING IN TRASH RACK SHALL BE 6"x6 ".
6. TOP OF TRASH RACK SHALL HAVE A GRID OF BARS
(MAX. 6 "x6").
no
TOP DAM- 392.0
1ST. 1"
-TOP SHELF 0.5' ABOVE P.- 389.0
BOTTOM SHELF 0.5' BELOW ,N.P. -388.0
PROVIDE 4 TOPSOIL ON 10 SHELF
1' SEDIMENT STORAGE
-BOTTOM OF POND
TOP OF DAM -39
PLAN VIEW OS2
OUTLET STRUCTURE
N.T.S.
NOTE:
ANTI -SEEP COLLAR.
(SHOULD BE PLACED
APPROX. IN THE
MIDDLE OF EARTH
DAM)
WALL THICKNESS AND
REINFORCEMENT DESIGN TO BE
DETERMINED BY PRECAST
CONCRETE MANUFACTURER
20'
EMERGENCY SPILLWAY
CROSS- SECTION
WET POND #2
BOTTOM EL- 384.0
NORMAL POOL- 388.5
TOP OF DAM- 392.0
HAND WHEEL---j
(ABOVE TRASH RACK)
PRECAST
CONCRETE
POND DRAIN
ELEV. -385.0
TOP ELEV. -389.8
Moffelm
SHAFT
STANDARD MANHOLE STEPS AT
16" O.C. SHALL BE PLACED ABOVE
OUTLET PIPE ON OUTSIDE OF STRUCTURE
DRAWDOWN PIPE
2" DIAM. INV.- 388.5
75' TO FES
385.0 30" RCP @ 1.0%
6" GATE
VALVE
GROUT
16' -8 "DIP BOTTOM _
POND BOTTOM SLOPE TO DRAIN +
I! I III lily I� I� I -I I I I -III I i� i
384.0
� 1 ICI Iii lil III I I II ail II ,
l- �i=1I N11�
'ii I ICI III III,1 I it I
Ei i I I " =I 1=1 I I
I =1'
THICKNESS 38.25" CONCRETE BOTTOM ANTI -SEEP COLLAR.
(MIN. FOR ANTI - FLOATATION) CROSS SECTION OS2 TO BE 18" AROUND ENTIRE PIPE
OUTLET STRUCTURE
N.T.S.
VAR. PUB IC
UTILITY i
\ �y \EASEMENTS (TYP.)
s
E
•QL
J M�
•` �` .`.�. A SPILLWAY]
L
,\ Z"
R V P�;
�M_N
IX
I
`•; �`�' nit �
\ J/ 1
OS2 R I P f�-A
GRAPHIC SCALE 1 = 20'
0 20 40 •!
MINIMUM RE011IR :EMENTS..FQ:R'ED.UCATIONAL SIGNAGE
FOR USE IN CONJUNCTION WITH STRUCTURAL
STORMWATER BEST MANAGEMENT PRACTICES
-MIN. 18 "- MAX. 36"
\\
1
PLANT
LIST LITTORAL SHELF
PLANT SCHEDULE:
I
\
SHALLOW LAND
I
I
runoff to reduce the risk of flooding and
(HERB.)
properly by: not dumping trash or yard waste,
recycling or safely disposing of pet waste, oil
MIN.
EF
EUPATORUIM FISTRULOSUM
JOE PYE WEED
,
4 -6 POT @ 3 SPACING
36"
HC
HIBICUS COCCINEA
SCARLET ROSE MALLOW
4 -6" POT @ 3' SPACING
contact information)
DL
DICHROMENA LATIFOLIA
WHITE STAR GRASS
4 -6" POT @ 3' SPACING
HIS
HIBISCUS GRANDIFLOURS
VELVET MALLOW
4 -6" POT @ 3' SPACING
567.4011 or at stormwatekhollyspringsnc,us
CG
CHELONE GLABRA
WHITE TURTLEHEAD
4 -6" POT @ 3' SPACING
LC
LOBELIA CARDINALIS
CARDINAL FLOWER
4 -6" POT @ 3' SPACING
NOTE:
SHALLOW
WATER
2. MATERIAL TO BE ALUMINUM, LETTERS TO BE BLACK ON A WHITE BACKGROUND,
(HERB.)
BMP, BUT SHOULD BE NO SMALLER THAN 18" X 18" AND NO LARGER THAN 36" X 36 ".
DRAWING NOT TO SCALE
u
JE
JUNCUS EFFUSES
SOFTRUSH 4 -6"
POT @ 3' SPACING
l�d1
AS
ACORUS SPP
SWEET FLAG 4 -6"
POT @ 3' SPACING
DA TE
IV
IRIS VERSICOLOR BLUE
FLAG IRIS 4 -6" POT
@ 3' SPACING
.0
PC
PONTEDERIA CORDATA
PECKEREL WEED 4 -6"
POT @ 3' SPACING
PV
PELTANDRA VIRGINICA
ARROW ARUM 4 -6"
POT @ 3' SPACING
SL
SAGITTARIA LONGILOBA
ARROWHEAD 4 -6" POT @ 3' SPACING
LANDSCAPE PLAN:
SHALLOW LAND= 2,600 sf USE
289 PLANTS FROM LIST ABOVE
SHALLOW
WATER= 2,400 sf (USE 267 PLANTS FROM LIST
ABOVE)
USE
EQUAL NUMBER OF PLANTS FROM LIST ABOVE
EMERGENCY SPILLWAY
CROSS- SECTION
WET POND #2
BOTTOM EL- 384.0
NORMAL POOL- 388.5
TOP OF DAM- 392.0
HAND WHEEL---j
(ABOVE TRASH RACK)
PRECAST
CONCRETE
POND DRAIN
ELEV. -385.0
TOP ELEV. -389.8
Moffelm
SHAFT
STANDARD MANHOLE STEPS AT
16" O.C. SHALL BE PLACED ABOVE
OUTLET PIPE ON OUTSIDE OF STRUCTURE
DRAWDOWN PIPE
2" DIAM. INV.- 388.5
75' TO FES
385.0 30" RCP @ 1.0%
6" GATE
VALVE
GROUT
16' -8 "DIP BOTTOM _
POND BOTTOM SLOPE TO DRAIN +
I! I III lily I� I� I -I I I I -III I i� i
384.0
� 1 ICI Iii lil III I I II ail II ,
l- �i=1I N11�
'ii I ICI III III,1 I it I
Ei i I I " =I 1=1 I I
I =1'
THICKNESS 38.25" CONCRETE BOTTOM ANTI -SEEP COLLAR.
(MIN. FOR ANTI - FLOATATION) CROSS SECTION OS2 TO BE 18" AROUND ENTIRE PIPE
OUTLET STRUCTURE
N.T.S.
VAR. PUB IC
UTILITY i
\ �y \EASEMENTS (TYP.)
s
E
•QL
J M�
•` �` .`.�. A SPILLWAY]
L
,\ Z"
R V P�;
�M_N
IX
I
`•; �`�' nit �
\ J/ 1
OS2 R I P f�-A
GRAPHIC SCALE 1 = 20'
0 20 40 •!
MINIMUM RE011IR :EMENTS..FQ:R'ED.UCATIONAL SIGNAGE
FOR USE IN CONJUNCTION WITH STRUCTURAL
STORMWATER BEST MANAGEMENT PRACTICES
-MIN. 18 "- MAX. 36"
\\
1
1
1
1
Best Management Practice
1
1
I
\
/
I
I
I
runoff to reduce the risk of flooding and
r
i,
Structural Stormwater
Best Management Practice
(BMP)
This BMP is designed to treat strormwater
runoff to reduce the risk of flooding and
improve water quality. You can help it function
properly by: not dumping trash or yard waste,
recycling or safely disposing of pet waste, oil
MIN.
18"
and other chemicals.
This BMP is inspected MAX.
36"
and maintained by:
(Add owner name and
contact information)
I
FOR QUESTIONS AND CONCERNS
0.5" (TYP.) I
PLEASE CONTACT OWNER
Town of Holly Springs Environmental Services
and Stormwater Management Division at (919)
567.4011 or at stormwatekhollyspringsnc,us
0.5" DIA. CENTERED
MOUNTING HOLES (2)
MOUNTING:
1. SIGN SHOULD NOT BE OVER 8 FT TALL AT HIGHEST POINT,
2. SIGN SHOULD BE MOUNTED TO A U- CHANNEL POST (ADD SPECS) OR AFFIXED TO FENCE.
NOTE:
1. DECORATIVE BMP EDUCATIONAL SIGNAGE WILL BE REVIEWED ON A CASE BY CASE BASIS.
2. MATERIAL TO BE ALUMINUM, LETTERS TO BE BLACK ON A WHITE BACKGROUND,
3. SIGN SIZE AND MATERIAL MAY BE MODIFIED FOR THE SPECIFIC NEEDS OF THE STORMWATER
BMP, BUT SHOULD BE NO SMALLER THAN 18" X 18" AND NO LARGER THAN 36" X 36 ".
DRAWING NOT TO SCALE
STANDARD DETAIL NUMBER.
HS000
me F'
BMP EEducOti0n0/ Signage
l�d1
DA TE
REVISIONS
_
TOWN OF ROLL Y SPRINGS ENGINEERING DEPARTMENT
.0
Springs:
z
0
El f 12 El /l
Hugh J. Gilleece
and Associates
875 Walnut Street
Suite 360
Cary, NC 27511
BUSINESS LIC. # C -496
Phone: [phone]
Fax: [phone]
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DSN CHK BY: DS
DWN BY: BH
DATE: 4/21/2014
HRZ SCALE: 1 " =20'
VRT SCALE: NONE