20150234 Ver 1_Site Plan_20150302 (3)

TOP OF DAM -284
WET POND #2
BOTTOM EL- 276.00
NORMAL POOL- 280.50 �
TOP OF DAM- 284.00
F� 8 -�
EMERGENCY SPILLWAY
CROSS- SECTION
TREATMENT VOLUME ELEVATION
- - - - - - - - - 10 YR. STORM ELEV- 283.00
u?. 10' NORMAL POOL- 280.50
PLACE 4" OF TOPSOIL FOREBAY ~ FOREBAY DIVIDER
ON PLANTED SHELF
1' SEDIMENT STORAGE- 275.00
1 CLAY LI
1' FREEBOARD
A
`#57 STONE TOPPED
BY CLASS B RIP -RAP
RETENTION POND CR06S- SECTION
NOT TO SCALE
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284 SPILL AY /� \
282 283
28
27 280
9
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TOP DAM - 284.00
,z--EMERGENCY OVERFLOW- 282.50
1 TOP SHELF 0.5' ABOVE N.P.- 281.00
BOTTOM SHELF 0.5' BELOW N.P.- 260.00
PLACE 4" OF TOPSOIL ON PLANTED SHELF
BOTTOM OF POND- 276.00
GATE VALV
AND POND
VELOCfTY REDUCTION PADS
DRAIN, SIZE
OUTLET
#
PIPE SIZE
(IN.)
ROCK SIZE
(IN.)
ZONE
ROCK CLASS
LENGTH L
(FT.)
WIDTH W
(FT.)
DEPTH
(IN.)
VELOCITY
V10
OS2
30
8
2
B
15
7.5
24
7.50
33
1 30
1 17
1 2
1 B
1 15
7.5
24
10.90
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 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. 5EE 5HEE1 4 FOR BMP CONVERSION SEQUENCE.
2. FOREBAY DIVIDERS ARE TO BE INSTALLED WHILE CONVERTING FROM SEDIMENT BASIN
TO WET POND.
3. GROUNDWATER NOT ENCOUNTERED.
nO A %AIM/I1A1AI ^IPE
'E- 30" RCP
PLAN VIEW OS2
PRIMARY OUTLET STRUCTURE
N.T.S.
HAND WHEEL
(ABOVE TRASH RACK)
POND DRAIN -
ELEV.- 276.00
POND BOTTOM
THICKNESS 33.25"
(MIN. FOR ANTI - FLOATATION)
TOP ELEV.
282.00
NOTE:
rlI V l l JLLI COLLAR.
(SHOULD BE PLACED
APPROX. IN THE
MIDDLE OF EARTH
DAM)
WALL THICKNESS AND
REINFORCEMENT DESIGN TO BE
DETERMINED BY PRECAST
CONCRETE MANUFACTURER
DRAWDOWN PIPE
2" DIAM. INV.- 280.50
UUIVUfIL I L DUI I VIVI
CROSS SECTION OS2
OUTLET STRUCTURE
N.T.S.
275.10
ANTI -SEEP COLLAR.
TO BE 18" AROUND ENTIRE PIPE
GRAPHIC SCALE 1 " =20'
mog
0 20 40 60
TRASH RACK DETAIL
N.T.S.
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 ") .
PLANT LIST LITTORAL SHELF PLANT SCHEDULE:
+ + + SHALLOW LAND
+ +
(HERB.)
+ + + EF EUPATORUIM FISTRULOSUM JOE PYE WEED 4 -6" POT @ 3' SPACING
+ + HC HIBICUS COCCINEA SCARLET ROSE MALLOW 4 -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 0
SHALLOW WATER L
(HERB.)
JE JUNCUS EFFUSES SOFTRUSH 4 -6" POT @ 3' SPACING
AS ACORUS SPP SWEET FLAG 4 -6" 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 PELTANDRA VIRGINICA ARROW ARUM 4 -6" POT @ 3' SPACING
SL SAGITTARIA LONGILOBA ARROWHEAD 4 -6" POT @ 3' SPACING
LANDSCAPE PLAN:
SHALLOW LAND= 2,065 sf (USE 227 PLANTS FROM LIST ABOVE) U
SHALLOW WATER= 2,252 sf (USE 248 PLANTS FROM LIST ABOVE)
USE EQUAL NUMBER OF PLANTS FROM LIST ABOVE LL
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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
CM - Transportation
CM - Building Inspections
Date
Date
Date
Public Works - Water /Sewer Date
Public Works - Electric Date
Public Works - S & E Date
Public Works - Env. Programs Date
Planning Date
Planning - Transportation Date
Fire Date
Parks, Recreation & Cultural Res. Date
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ED /,' \\ \\
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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JOB # 36000.05
DSN /CHK BY: DAS /DAS
DWN BY: BAH
DATE: 1210112014
HRZ SCALE: ' AS SHOWN
VRT SCALE: AS SHOWN
SHEET NO
C16