20150234 Ver 1_Site Plan_20150302

FLOW PATH
FES �>
/-7
OS6 RIP -RAP OUTLET
TOP OF DAM -270
N.T.S.
6'
1 DID DAD
EXISTING
GROUND
TAIL
WET POND #6
BOTTOM EL- 262.00
NORMAL POOL- 266.50
TOP OF DAM- 270.10
EMERGENCY SPILLWAY
CROSS- SECTION
zZ
/ 266
LLJ
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TREATMENT VOLUME ELEVATION /
10 YR. STORM ELEV- 269.10 7OP DAM - 270.10
1.0' FREEBOARD
_ µ+^ - EMERGENCY OVERFLOW - 268.70 /
v?
10, F-NORMAL POOL- 26650 ^ 10' m 268.00
_ 10 TOP SHELF 0.5' ABOVE N.P. 267.00
BOTTOM SHELF 0.5' BELOW N.P.- 266.00
�• `� ti r PLACE 4" OF TOPSOIL ON PLANTED SHELF
FOREBAY
PLACE 4" OF TOPSOIL i _ - _ FOREBAY DIVIDER
ON PLANTED SHELF
1' SEDIMENT STORAGE- 261.00
#57 STONE TOPPED
1' CLAY LINER BY CLASS B RIP -RAP
RETEMION POND - SECTION
NOT TO SCALE
VELOCITY REDUCTION PADS
BOTTOM OF POND- 262.00 /
I
OUTLET
#
PIPE SIZE
(IN.)
ROCK SIZE
(IN.)
ZONE
ROCK CLASS
LENGTH L
(FT.)
WIDTH W
(FT.)
DEPTH
(IN.)
VELOCITY
V10
OS6
24
8
1
B
12
6 TO 12
24
7.20
FES 1
24
15
2
B
1 12
6 TO 12
1 24
1 10.2
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 B"
THICK AND SHALL EXTEND 1B" 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 4 FOR BMP CONVERSION SEQUENCE.
2. FOREBAY DIVIDERS ARE TO BE INSTALLED WHILE CONVERTING FROM SEDIMENT BASIN
TO WET POND.
3. GROUNDWATER NOT ENCOUNTERED.
HAND WHEEL
(ABOVE TRASH RACK)
POND DRAIN -
ELEV.- 262.00
POND BOTTOM
THICKNESS 33.25"
(MIN. FOR ANTI - FLOATATION)
TOP ELEV.
268.40
i
00,
GATE VALV
AND POND
DRAIN, SIZE
V GRAPHIC SCALE 1 " =20'
0 20 40 60
TRASH RACK DETAIL
N.T.S.
6"
TRASH RACK
.9
OUTLET
STRUCTURE
TRASH RACK NOTES
I. TRASH RACK SHALL BE 6'' CLEAR OF STRUCTURE TOP AND
SIDES. 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 l .
PLANT LIST LITTORAL SHELF PLANT SCHEDULE:
SHALLOW
LAND
SOFTRUSH
4 -6"
Date
POT
@
3'
SPACING
+ + +
+ + (HERB.)
ACORUS SPP
SWEET FLAG
4 -6"
Planning - Transportation
POT
@
3'
SPACING
+ EF
EUPATORUIM FISTRULOSUM
JOE PYE WEED
4
-6"
POT
@
3'
SPACING
+ + HC
HIBICUS COCCINEA
SCARLET ROSE MALLOW
4 -6"
-6"
POT
@
3'
SPACING
DL
DICHROMENA LATIFOLIA
WHITE STAR GRASS
4
-6"
POT
@
3'
SPACING
HG
HIBISCUS GRANDIFLOURS
VELVET MALLOW
4
-6"
POT
@
3'
SPACING
CG
CHELONE GLABRA
WHITE TURTLEHEAD
4
-6"
POT
@
3'
SPACING
LC
LOBELIA CARDINALIS
CARDINAL FLOWER
4
-6"
POT
@
3'
SPACING
SHALLOW WATER
(HERB.)
JE
JUNCUS EFFUSES
SOFTRUSH
4 -6"
Date
POT
@
3'
SPACING
AS
ACORUS SPP
SWEET FLAG
4 -6"
Planning - Transportation
POT
@
3'
SPACING
IV
IRIS VERSICOLOR
BLUE FLAG IRIS
4
-6"
POT
@
3'
SPACING
PC
PONTEDERIA CORDATA
PECKEREL WEED
4
-6"
POT
@
3'
SPACING
PV
PELTANORA VIRGINICA
ARROW ARUM
4 -6"
POT
@
3'
SPACING
SL
SAGITTARIA LONGILOBA
ARROWHEAD
4
-6"
POT
@
3'
SPACING
LANDSCAPE PLAN:
SHALLOW LAND= 1,723 sf (USE 190 PLANTS FROM LIST ABOVE)
SHALLOW WATER= 1,585 sf (USE 174 PLANTS FROM LIST ABOVE)
USE EQUAL NUMBER OF PLANTS FROM LIST ABOVE
n" no A mr-%nUlKi oiPE
E- 24" RCP
VVCIR UrF_ ivnvv
NOTE. PLAN VIEW OS6
WALL THICKNESS AND PRIMARY OUTLET STRUCTURE
REINFORCEMENT DESIGN TO BE
DETERMINED BY PRECAST N.T.S.
CONCRETE MANUFACTURER
DRAWDOWN PIPE
2" DIAM. INV.- 266.50
- UUIVUPCC iC dV l IUM
CROSS SECTION OS6
OUTLET STRUCTURE
N.T.S.
261.50
ANTI -SEEP COLLAR.
TO BE 18" AROUND ENTIRE PIPE
�. COLLAR.
(SHOULD BE PLACED
APPROX. IN THE
MIDDLE OF EARTH
DAM)
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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MR, E M E I E I
E I
Hugh J. Gilleece
and Associates
875 Walnut Street
Suite 360
Cary, NC 27511
BUSINESS LIC. * 0-496
Phone: [phone]
Fax: [phone]
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JOB # 36000.05
DSN /CHK BY:. DAS /DAS
i DWN BY:
BAH
DATE: 12/01/2014
HRZ SCALE: AS SHOWN
VRT SCALE: AS SHOWN
SHEET NO.
1
C14
1