SW3160405_APPROVED PLANS_20160502

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW _�l
DOC TYPE ❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

yam,
_ •.o — am. . Raw
`73
COTTON FLATS
NC HIGHWAY 75
WAXHAW, NC
UNION COUNTY
- — SEABOARD COASTLINE RAILROAD __
coo
1
N
2MERLY
E MILL
> LLC
-664
10-002A
VICINITY MAP
NOT TO SCALE
rat►E+. OF .FF-
� 71 I COVERSHEET
sznmTZUS7WG CONDITIONS
SHEET 3 SIM PLAN
SI]EFT 4 OVERALL SM PLAN
SHEET • DRALMAGN PLAN
SHEET DRADIAGE
SHEET MGRADING PLAN
`IM" 9 PRE—DEVELOPAIENT
SHEET I POST—DEVELOPIATUYT PLAN
SHEET I FILTER DETAIL SHIFT
`I M 12 UT11177SEVER
SHEET1 1'
SHEET ' 1 EROSION , ,
IN • EROSION CONTROL
SHEET 16 DETAU, SHEET
SHEET DETAIL SHEET
SHEET: DETAIL SHEET
SHENT 19 DETAIL SHEET
GRAPHIC SCALE
s0 120
( IN FEET )
1 inch = 60 ft
THIS PLAN IS A FINAL BRA )FING-NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIALLED DATED AS APPROVED:
APPROVED: /
LS
240
re aired U th • s,crr ,rn:a s-' t Carnfina
NO,
DATE
roles r -'. 3'IdNr rz; sirr,nw:sr snsxsrr desigier
BY
PROJECT NO.
SHEET TITLE Plans and sp.^cs, and ;:s;r,ny ,,vr ;',dance with the
stormwater rules. (16A NCP C 2H .1008 (j) )
Permit # <" fll el4y5 Date L. 20 IL
COVER SHEET by M "^'°'�
Sheet# I e_F_14 _Rev6sbn Date 2@ f.
s i .E 60�
DATE
7/24/15
PROJECT
P
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: DHD VENTURES
DRAWN BY
BTG
CHECKED
MAH BY
XARBROUGH-WILLIAMS & �IOULE' INC.
Planning o Surveying o Engineering
780 11auiwr Oek Court (211278) P.O. Box 7007 (28241)
Charlotte, North Carolina
704.556.1990 7041M.0606(tss)
DRAWING W
.r
SHT 1 OF 19SHT
v
v
V
11 I 1 f I t ! r

VICINITY MAP
NOT TO SCALE
SEABOARD COASTLINE RR 100R/W
PER MB:J-568
PROP. CONCRETE DUMPSTER c��• SITE
PAD WITH ENCLOSURE- (SEE SEABOARD COASTLINE RAILROAD I �`G�\e��� S�•
CROSSWALK AND ARCH. PLANS) HALF OF
REBAR - HANDICAP RAMP (TYP.) -. DUMPSTER AREA TO BE -
FOUND - LIGHT POLE P��
RESERVED FOR RECYCLABLES. ���
(TYP.). EX. MILL TO BE RENOVATED FIRE TRUCK cam(• HWY 75
' 10 B' INTO APARTMENT UNITS, TURNAROUND AREA
\�
SIGN HEAVY DUTY TYP RESTAURANT, .AND OFFICE USES. W
.PAVING _ _ _ _ SEA80ARD COASTLINE RR 100' R/W
AREA (TYP.) _- - - - - PER MB:J-568
Pff
-—-
FOUND
OWNER
_ + 9 _ - WAXHAW MILL VENTURES LLC
6225 CARMEL RD
\ �, _ ---- O CHARLOTTE, NC 28226
A - _ _ _ _ RESTAURANT i T xh'':
� \ \ \ ..1 - ' �." � SPACE .. s . r .>:. '_• ,`�. � � MATT WARD: 704-507-2039
- ^� ___-- •:;i.' s,aeo sF. f + : 10 [e-mail]
P \ \ \ __ - - - - - 3 + ___ .. '• - of O 7 I
roux sicN \ \ \ \ `• -- _ \ �. _ - _ . � � I \ \ \ \ .r ��o. \ 10 = _ - = 1 Q Oz OO O + +.. 1O DEVELOPMENT DATA
1 O TAX PARCEL NO.: 05-110-002, 05-110-006, 05-110-007
o1cE sPncE 10 10 ! ZONING: TC
ILL APAR SITE ADDRESS: 403 EAST SOUTH MAIN STREET
3,914. S.F. ,f .'f�,
22 UNITS v. .
O PROPOSED USE: APARTMENTS, RESTAURANT, OFFICE
(f (D '
\\\4cP\ \ O� -- - O _
' L.. 2 O O
;. NOW OR FORMERLY MIN. FRONT SETBACK: 20' FROM CLOSEST BUILDING
_ z �
' PROP. 8' SIDEWALK ALON \ \ o \ O y ' O RENAISSANCE MILL
(ice OAK POINT TO RM OF HIGHWAY 75 (PER TOWN OF WAXHAW)
PROJECT FRONTAGE
� iGL444.. �.�,�f,,y f �. ; y;: •L-:, •\� O 0SANDS FILTER PROPERTIES LLC. MIN. SIDEYARD: 0' 1 I DEED:739-664
MIN. REARYARD: 0'
to -- -- f, , .;a4�• PARCEL #05-110-002A
FUTURE 50' ROW LINE \\ C' _ -- _ 20 WIDE PERVIOUS PAVER ¢ ! + `
O a.-_ QQ \ � � � : CONNECTOR DRIVE. PERVIOUS "' r p :. O 6 s TOTAL SITE AREA: 6.816 AC.
\ a` eT1MO AREA (Faffi D
EX. 30' ROW LIN HRE - Kt U <) R F,Q -- = RBANGR 0 BE CONTECH f ,, 911 Set AREA DEDICATED AS RM TO NCDOT: 0.384 AC.
4
4
4
4
D STEEL WAVE RACK SET \ ___ EN GRASS PAVER
❑ NET SITE AREA: 6.432 AC.
N T CKE ED S � __- _ _ - • OR APPROVED. I ❑ C� ❑ ':<:�; ' Y .
Slgl P G .: -}`PPE f 'I ,i^4 .wi4f,': ter,' ,:7riy •;ri;:: tr _`K.: :
'• \---T'�- ,f
-/ / sr \ \GN_ o. :. ♦ \ + - " . .. ... .i;:A1'.:.w•w..• aa�i `,4;;Nf.�.. Lf,�r;v::f:1o,frf :f.. '�{•'ii'fT.-. JoT{..'t^4;�va%� iYr:a•,;-ra.r.+ ��{.., :a. . •F, :. �..
N AP E
N TS .s
I DATUM:NAVD 88- VERTICAL
EX. 42ANNAD 83 HORIZONTAL
sicN PECAN 41 UNITS
Ex u�
\\.\$, PECAN
\Y` -6" PROP. 1' � '` �, MAX. PARKING SUMMARY
UPRIGHT CURB & ° \ ♦ 2 10 10` O HEAVY DUTY RESTAURANT: 50 SPACES (FOR 150 SEAT RESTAURANT)
♦ s k 1 2 O PAVING
GUTTER (TYP.) r" . y . p/. O 20 1O O � O '' s i AREA (TYP.) OFFICE #1: 12 SPACES (FOR 3,914 S.F. OFFICE)
�` \p•. \ B OFFICE #2: 7 SPACES (FOR 2,200 S.F. OFFICE)
MP D WN FO a RESIDENTIAL: 152 SPACES (FOR 101 BEDS)
5' SIDEWALK(TYP.) \F \. __--- ` . HANDICAP ACCESS (TYP. 10 MAX. PARKING ALLOWED:221 SPACES
\ -- -- ` - -
\ 'y' 1 2 02 10 10 _ TOTAL SPACES PROVIDED: 219
\ % \' _ ,° •. 1 02 10 O = N _ + INCLUDES 11 HANDICAP SPACES (4 VAN ACCESSIBLE)
DROP CURB TO ALLOW FOR \ no fN ". _ v (D O -- _ - _ _ _ _
ACCESS TO FOX'S PIZZA DEN \ \ \ PA \ \ '� _ _ - 1� '- -- - - _ _ = LIGHT POLE
•. .. �..., ., ;:� �: -2Z�- (TYP.). APARTMENT UNIT INFORMATION
�T \\ o o�'� B k °x • . �!�� _ - a =~ _ MILL APARTMENTS: 2- 1 BEDROOM UNITS
- - = 20 2 BEDROOM UNITS
__-- __ - _ -_ - ANNEX APARTMENTS: 23- 1 BEDROOM UNITS
DUD° \
\ - ---- - --- - --- - --- --- - --_
. __ _ TOTAL:
PORTION OF EX. PAVED DRIVE \ 'o - --- - _---_--_- ----- ------ ----- --- ---- - ----- --- •� -
_
_ nP 18 2 BEDROOM UNITS
Fr. \: -_-- -------------- _-- -__ -_ - _------- --- ---- B' -__-_ ---- Rl _
QP \`. o, B TYP _,,' - - ----- - - - --_ s' FOUND 63 TOTAL UNITS
PROPERTY TO BE REMOVED. AREA aIP \\ \ a 24, _ _ _ _ _ _-_ - - to TYP 101- TOTAL BEDROOMS
TO BE LANDSCAPED. 0 1 \ _ - - ___
FEW
EX. 30' ROW LINE---
°�
o2Fl� SPACE 7 ___ "°' -•--- __ � = Y ` � PROP. CONCRETE DUMPSTER
S\ 5' WIDE SIDEWALK CONNECTION WITH 5' \ \ \ - - -- - �f s _ -- 10 PAD NTH ENCLOSURE (SEE
_ _ sEr
LANDING. HANDRAIL TO BE INSTALLED _FEW ARCH. PLANS) HALF OF
BETWEEN 5' LANDING AND 8 WIDE \\ \ \. - _ - _ +_ - - - - - -_ - sEr 11 FOUND HATCHED AREA TO PROP. 1'-61, DUMPSTER AREA TO BE
, 1
SIDEWALK ALONG HIGHWAY 75. \\ --- ----� BE DONATED AS UPRIGHT CURB & RESERVED FOR RECYCLABLES.
GRAVEL AREA
\\\
S gr
-___----' 1 5' SIDEWALK (TYP.)
R/W TO THE TOWN GUTTER (TYP.)
J
EX. AND LANDSCAPE
ON FORMER HANCE AND TOWN OF
=
DROP CURB TO ALLOW FOR
1
OF WAXHAW i
w
�\
-
CONNECTION OF EX. BARTLETT
WAXHAW PROPERTIES TO BE
_ Li
-awe ---
PROPERTY DRIVEWAY
NOW OR FORMERLY
a1
REMOVED. AREA TO BE LANDSCAPED.
\ _- -_
-
DANIEL JOHN CARDELLI I
rn
FUTURE 50' ROW
LINE
\ -
-_
-
NOW OR FORMERLY
SILVIA G. CARDELLI
-0.
\\
THOMAS D. BARTLETT
1 1
DEED:768-820
-
JANET R. BARTLETT
PARCEL #05-110-003
PROP. 8' SIDEWALK
ALONG
\�
SSIGN
DEED:897-906
NOW OR FORMERLY
PROJECT FRONTAGE
\ `
\
PARCEL #05-110-004
THOMAS D. BARTLETT
\\
JANET R. BARTLETT
1
\ \
1 DEED:897-906
\
A PORTION OF EX. HANCE
PARCEL #05-110-020
\
PROPERTY BUILDING TO BE
�\
DEMOLISHED. REMAINING
SIGGN 1raaP
BUILDING AREA TO BE USED
L__-----
�
AS OFFICE SPACE.
1
si N
\\
1
1
1
STONE
PUNIER
\\
1
T
ACCESSIBLE ROUTE
SIGNAGE SIDEWALK (SEE NOTE 3)
\CCES5N —SIGN R7-9a
m
RESERVED
PARKING
SIGN Ill
Imo""
ACCESSIB
ONE OUT OF EVERY EIGHT (8)ACCESSIBLE SPACES. BUT
NUT LESS THAN ONE. IS REWIRED TO BE VAN ACCESSIBLE.
MAXIMIUM
PENALTY -SIGN R7-80 PARKING SPACE PAVEMENT MARKINGS
j 250 O
FINISHED GRADE VAN R7-8e RESERVED
ACCESSIBLE 12'xe PARKING PARKING
Ilil __RESERVED Dili n mi R7-a
1x18'
—Y IIII�� PARKING °i�i12'x18
OEe ' 72'
® LoO
fill ONLY
R7-e
12'x18'
-BD
REQUIRED ACCESSIBLE MAXIMIUM
RESERVED PARKING SIGN PENALTY 12'x8'
t 250
MAXIMIUM RT-lul
PENALTY 12'xi
l$ 2 O
\\ SON \ G r _ DEED 140_236.
� J THIRD STRE� 258-322
AN
ROAD
SIGN
i
� I P
664 (TRAC
DEED 7g9 _
' 1�1
i
RSEAAL�**
14906
o �iillirrl101 ,,ill/
— HEAVY DUTY PAVEMENT
GRAPHIC SCALE
0 20 40 80
IN FEET )
1 inch = 40 ft.
THIS PLAN IS A FINAL BRAKING —NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIALL ATED S APPROVED:
APPROVED: / Alf
A
Approval rR+
a„ ;...
NO.
DATE
iSIQAb ,Put , 4e siorrnwe a nyswn designer
BY
4" ' .•
SHEET TITLE plans and specs andw,rsyco,rra,!iancawthUla
etormweter rules. (15A NCAC 2H .1008 1
SITE PLAN Parmnacr,��l4„ogo5 Date S,z.zo1
by M 12AAt�hL.L_•t4�IVbbRaLklaleFC
Sheet #i , Revlslon Oats • Z
ROJECT NO,
SCALE
„=40'
%24/15
PROJECT
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: DHD VENTURES
BT BaY
BTG
CHECKED
MAH BY
YARBROUGH-WILLIAMS & I•$OULS9 iNc.
Planning o Surveying o Engineering
730 Wiled r Oak Court (28279) P.O. Box 7007 (28241)
Charlotte. North Carolina
704.5a9.IBBO 704MO.Or705(fax)
IO2AVING Nd
249-44
qq •�
SHT J OF I `� AQ
SHT

PROP. CONCRETE DU- M159W
PAD WITH ENCLOSURE (SEE
ARCH. PLANS) HALF OF
DUMPSTER AREA TO BE
RESERVED FOR RECYCLABLES.
.HEAVY DUTY I •'
{ { PAVING ___ _ ___ :,..p•
AREA (TYP.) - -- _ - -- -- - - a
--------------
3ASO S.F.
—• _ �-v _ � � 1 � \ -- - RESTNJItANT
SIDEWALK
R7-eG
m
R7—B
ACCESSIBLE ROUTE
(SEE NOTE 3)
ONE OUT OF EVERT' EIGHT a ESSIBLE SPACES, BUT
NOT LESS 7HONE. 6 R IRTHAND TO BE. VAN ACCESSIBLE
R7-BD PARKING SPACE PAVEMENT MARKINGS
O
GRADE VAN R7—e0 RESERVED
ACCESSIBLE 72 Xa PARKING PARKING
GlaAatEo R7-1 ® MUTCD
RESERVED R7-8
PARKING PASIGINGEN R7—i 12'x18' 12'x18'
R7-8 ONLY
12•x18
REQUIRED ACCESSIBLE MAXIMIUM R7�D
12'x9'
RESERVED PARKING SIGN PENALTY
$ 250
[7MAXIMIUM R7-8D
PENALTY 12'x9'
S z50
MR
CROSSWALK AND
HANDICAP RAMP
.:..SEABOARD COAST
LIGHT POLE
- (TYP.).
RAILROAD
EX. MILL TO BE RENOVATED -
/�' INTO APARTMENT UNITS.
/ RESTAURANT. AND OFFICE USES.
',i/ W 100' R/V
00 lawX
PROP. 8' SIDEWAU� ALO
PROJECT FRONTAGE
0
0
FUTURE 501'. ROW LINE
® l
PROP. 7`'t \
UPRIGHT CURB k
GUTTER (TYP.). �� ® ® t0 lO ® ® (D ® e
\ P N FO
5' SIDEWALK\ ' -- p
q� • HANDICAP ACCESS (TYP.
DROP CURB TO ALLOW FOR
ACCESS TO FOX'S PIZZA. DEN - _ - _
PORTION OF IX. PAVED DRIVE GF�, \\. 0 ?. - __ __ _.__. _ _ = r -- __
WITHIN FORMER TOWN OF WAXHAW Q- .a _ _ - _ ___ __ _ p - - _ _ r _ _
PROPERTY TO BE. REMOVED. AREA QP •oP r 9 -__ _ - -
TO BE LANDSCAPED.. ~'' \ _ _ _ ___ _ �--
e �. o
IX. 30' ROW UNE VWDACE
,o
5' WIDE SIDEWALK CONNECTION WITH 5'
LANDING. HANDRAIL TO BE INSTALLED
BETWEEN 5' LANDING AND 8' WIDE HATCHED AREA TO PROP. 1'-6'
_____
SIDEWALK ALONG HIGHWAY 75. __ :-- _<- ___--T BE DONATED AS UPRIGHT CURB ec
IX. GRAVEL AND LANDSCAPE AREA\\ - - 1 1 5' SIDEWALK (7YP.) R/W TO THE TOWN GUTTER (TYP.)
ON FORMER HANCE AND TOWN OF \ _ --- _ - DROP CURB TO ALLOY) FOR 1 1 OF WAXHAW
WAXHAW PROPERTIES TO BE \ !,9- _ CONNECTION OF IX. BARTLETT 1
REMOVED. AREA TO BE LANDSCAPED. PROPERTY DRIVEWAY 1 1 NOW OR FORMERLY
- _ _ _ I I DANIEL JOHN CARDELLI
FUTURE 50' ROW UNE - NOW OR FORMERLY 1 1 1 SILVIA G. CARDELLI
-_ THOMAS D. BARTLETT 1 1 I DEED:768-820
JANET R. BARTLETT 1 1 1 PARCEL #05-110-003
PROP. 8' SIDEWALK ALONG \ DEED:897-906
\ ` PARCEL 05-110-004 1 NOW OR FORMERLY 1 I
PROJECT FRONTAGE N 1 THOMAS D. BARTLETT 1 I
'\ 1 JANET R. BARTLETT 1 I
\ 1 DEED:897-906 I I
A PORTION OF EX. HANCE 1 PARCEL #05-110-020. 1 1
PROPERTY BUILDING TO BE
DEMOLISHED. REMAINING 1 1
co. BUILDING AREA TO BE USED
OFFICE SPACE I
1
\\\ \\ 11 DEED 739-664 (TAT IQ
\ \
�DEED 1A0\ THIRD
SMEla 258-
\\ \\ ��\
IINNNN
NI
\�
Y \� \ \ \
NOW OR FORMERLY
RENAISSANCE MILL
PROPERTIES LLC
DEED:739-664
PARCEL #05-110-002A
HEAVY DUTY
PAVING
AREA (TIP.)
LIGHT POLE
(TYP.).
D
PROP. CONCRETE DUMPSTER
PAD WITH ENCLOSURE (SEE
p
ARCH. PLANS) HALF OF
m
DUMPSTER AREA TO BE
p
RESERVED FOR RECYCLABLES.
J
1
rn
.P
J
VICINITY MAP
NOT TO SCALE
OWNER
WAXHAW MILL VENTURES LLC
6225 CARMEL RD
CHARLOTTE, NC 28226
MATT WARD: 704-507-2039
M WARD@DH DVENTURES.COM
DEVELOPMENT DATA
TAX PARCEL NO.: 05-110-002, 05-110-006, 05-110-007
ZONING: TC
SITE ADDRESS: 403 EAST SOUTH MAIN STREET
PROPOSED USE: APARTMENTS, RESTAURANT, OFFICE
MIN. FRONT SETBACK: 20' FROM CLOSEST BUILDING
POINT TO R/W OF HIGHWAY 75 (PER TOWN OF WAXHAW)
MIN. SIDEYARD: 0'
MIN. REARYARD: 0'
TOTAL SITE AREA: +6.81 AC.
* A PORTION OF SITE AREA WILL BE DEDICATED AS RAN
FOR HIGHWAY 75 TO NCDOT
DATUM: NAVD 88- VERTICAL
NAD 83- HORIZONTAL
MAX. PARKING SUMMARY
RESTAURANT: 50 SPACES (FOR 150 SEAT RESTAURANT)
OFFICE #1: 12 SPACES (FOR 3,914 S.F. OFFICE)
OFFICE #2: 7 SPACES (FOR 2,200 S.F. OFFICE)
RESIDENTIAL: 152 SPACES (FOR 101 BEDS)
MAX. PARKING ALLOWED: 221 SPACES
TOTAL SPACES PROVIDED: 220
INCLUDES 10 HANDICAP SPACES (3 VAN ACCESSIBLE)
APARTMENT UNIT INFORMATION
MILL APARTMENTS: 2- 1 BEDROOM UNITS
20- 2 BEDROOM UNITS
ANNEX APARTMENTS: 23- 1 BEDROOM UNITS
18- 2 BEDROOM UNITS
TOTAL: 25- 1 BEDROOM UNITS
38- 2 BEDROOM UNITS
63- TOTAL UNITS
101- TOTAL BEDROOMS
KEY
= 1 BEDROOM
1 APARTMENT UNIT — HEAVY DUTY PAVEMENT
= 2 BEDROOM
0 APARTMENT UNIT
GRAPHIC SCALE
60 120
( IN FEET )
I inch = 60 fk
THIS PLAN IS A FINAL BRA RING -NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIALLED/ ATED AS APPROVED:
APPROVED: bq
IrVnACS� DATE
NO.
DATE
R moire that t9i system designer
=• '-
BY
plans and specs; end trill,
SHEET TITLE Y a2H .1 08 with the
atormwater rules. (15A NCF,C 2H .1008 (j) )
PermN#_S/t)�-6040r Date%L.
OVERALL SITE PLAN DyR IAND� L
Sheet #__4/_j_j_Rev(Bion Date I Zg
JECT N0.
LE
-60
/24/15
PROJECT
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: DHD VENTURES
DRAWN BY
BTG
CHECKED
MAH BY
YkmstoUGH-WILLIAMS & Houm' )(Pic.
Planning Q Surveying O Engineering
730 tll i&w Oak Court (28'L7S) P.O. Bo= 7007 (28241)
Charlotte. North Ca vUm
704158.1990 704.556.05*11 z)
DRAWING N0.
249-43
SHT 4 OF 19SHT

VICINITY MAP
NOT TO SCALE
\ 1
SEABOARD COASTLINE RR 100' R_
SEABOARD COASTLINE RR 100' R_
PER MB:J-568
CB
2 1.18 AC.
CB 1 0.35 C.
TC:
INV
663.0
IN(CB 9): 660.00
-
_______
_ _ _ _
CB
2A 1.20 AC.
FES 45
TC: 662.0
=
TC:
663.9
INV: 663.45
INV OUT: 659.06
INV
IN(CB 1): 658.57
- - � � =
`-\y,-
INV
IN: 658.00
- _ _ _= ------
CB
4 1.89 AC.
MH 4A 2.59 AC.
V: 5.7
- - -
- _
INV
OUT: 658.22
-
INV
OUT: 657.90
-___--_
DI 3 1.44 AC.=
_-
TC:
665.0
___
RIM: 662.0
W:11.3' X L:10.0'
-- - - -
--------- --
-- ---,
--------
r 1
--,-- _=
`-- \_
LIP: 664.3
INV IN: 657.41
_ ---
__
`-
INV
INV
IN(24"): 655.76
IN(12") 661 43
---__
- - -
_
- - -
INV IN(24 ): 655.54
_
.0 DIA. RIP RAP \ \
10.0" MIN. DEPTH
�GN DISCHARGE ® GRADE \ \
' INV IN 15" : 659.00 =
8 66' 15"HDPE ® _0 /-_----- INV OUT: 656.81 INV OUT: 655.66 - ( ) - - '--__ CB 5 2.76 AC.
0.50% -- -\ �-- � ------ '----- INV OUT: 655.44 `� - -, - - _-- _ - TC: 663.0 _ -
\ INV IN: 654.53 _
\ \ 6 °� " _ 18 24 HDPE \ \ `\ S ABOA
�\ RP CdASTLINE RR 100'�R,(W INV \OUT: 54.43 \
HDPE _1 \ LHDPE ® PER MB:J=56g-
_ 180.51' 24 HDPE 0 0.50%
®,___, 6 � 210.62' 24"HDPE 00.50% ----_
®t3 TC: 663.5
PA G \ \ YA .�'V \ y.. •' \\ j
BMCK wilic SIGN \ '<. ��Z'o INV -OUT: 660.56
FES 8
INV: 653.0
\ I ro t
A , \ \ \ \ I �� � � \ \ ; W:18.5 X L:16.0'
\\ 0 6`(� \ / " "• \ v � � \ \ / 0 MIN. DEPTH
IP RAP
11 EPTH
\\ 35 MP m DISCHARGE 0 GRADE
N, ® \ NOW OR FORME L
\ \ RENAISSANCE MILL
FES 44 0.37 C. \ �\ \.�G /:;" 1
\ OAK 1 iir .... \, 1 \ I I� �: 3't-Y a<, \
INV: 664.45 \ - / -
RIP RAP FOR INLET \ \` C \�� _ �, `. '•.: I �' `\ \ PRO
\ \\. � - / .IT.^.,. � n;��,a..: f:,��`:::: 1a�::�� �r.�•�rr;�. • _ I o SAND FILTER \ ,
cw ;.i. MH 6A 0.41 AC. <,a.. \ \
PROTECTION
RIM: 665.84 i �� \ \ \ PRCELE NV: TFES 1653.0
g. 5 ': , ' s.. O .; : INV IN(8"): 661.79 (t\ 65.13, \ \\ V. 5.2
\ o ��� AAEA ( r INV IN(6"): 662.57 15"HDP ` W:18.5' X L:16.0'
\\ \\ o \ '•. . ���: suN snr smmo N a 'r INV OUT: 661.40 ®2.21� rn \ ` 6.0" DIA. RIP RAP
❑ CoLffT \I 10.0" MIN. DEPTH
\ DISCHARGE ® GRADE
STR '+. �� ''`� \ .. �� PECAN 4. ` '+"ii �ci'' :r+;`t )T ba '. :if'Lv ._ ..,y. \ \ \ 1 \
pA' ,:Fi. .Irwnc �'If.Kg4' :IYwi ir!,yiWn,wR `.. � �... •.T: 1 \I r \ .30' DPE \ i \ \\ \\ CB 14 2
\ • ` ` ` Ex 42" \ f., ''•. • v . • ''' - J I ® D.SD% �l ` \ \ `
- - TC: 658.9 _ \ PECAN f ,• , ' �- 1\ I \\ \ INV IN(CB 17):.653.36
CB 6 3.42 AC. i \\ \ INV IN(CB 13): 655.11
01 10A 0.15 AC. t. TC: 663.0 ��E�" " INV OUT: 653.08
\ LIP: 665.5 INV IN(24 ). 653.64
NV: 667.90 \ ®�;'s, p/ INV OUT: 660.06 ^� ( ") q� CB 17 0.51 AC.
FES 43R; INV IN 15 : 659.96 O o-
V: 3.2 \ o tJ� \�``. \ \\\ \ INV OUT: 653.17 \ osc^ TC: 657.8
W.'11.3' X L:10.0' \`brt\ y� -� \ `\\. ,� \ `\ \\`\ is DI 12 1.95 AC. \\ \
s 3 INV OUT: 653.56
6.0' DIA. RIP RAP \ �'. \__ DI 11 1.35 AC. 0 A/0
\ - LIP: 664.2 0 A CALL
10.0" MIN. DEPTH \\ y.tyd - \ \ y LIP: 664.E INV IN: 657.46 ` t `\ i �' `\ sOy `\ NC ONE CALL SYSTEM
DISCHARGE DEGRADE \` `O ';\ ®°4°' INV IN: 658.35 / \ `` BEFORE YOU DIG 1). CONTRACTOR IS FULLY RESPONSIBLE FOR CONTACTING
\\ \ S „e %� - = 9' INV OUT: 656.86 \�j%/ f APPROPRIATE PARTIES AND ASSURING THAT EXISTING
S 1 ro INV OUT: 658.00 Q,rOy I\ \ i UTILITIES ARE LOCATED PRIOR TO BEGINNING CONSTRUCTION.
CB 42 0.18 AC. clySp A(9•
\ S CT lg� cp \ ma. \ 2). CONTRACTOR IS RESPONSIBLE FOR PLACING BARRICADES
TC: 670.7 \ 1 S O ® RCp . CO \\ P / J �QQ% \ USING FLAGMEN, ETC., AS NECESSARY TO INSURE SAFETY
INV IN: 668.06 NA \\ A iL 40 \\` TO THE PUBLIC.
11
INV OUT: 688.03 \ O ✓' 0 " )' . \ FJ�� `\ \ I \ ` 3). ALL PAVEMENT CUTS, CONCRETE OR ASPHALT, ARE TO
109.78' 18"HDPE ®0.50% BE REPLACED ACCORDING TO STANDARDS OF THE NORTH
CB 41 0.15 AC. �\ ttom�/ � � '• \�� ` � � - �- �A R� ---,�\I' �S •�: • ';� �,.^ \ � CAROLINA DEPARTMENT OF TRANSPORTATION AND
TC: 671.5 O \ \'.. 66 _ _ _ _ 5- - _ _ ® y x'0, CMUD SPECIFICATIONS.
O \ S \ \ 141.07 15 HDPE ® 0.50% - _ _ 0 p
\ o f \ a .. '
INV IN: 668.86 �w� \\\ \\ �� \\\ - --- - _ - -- `SOyF \ `\ \ 6 ; 1-800-632-4949 4). SHORING WILL R ACCORDING TO OSHA TRENCHING
INV OUT: 668.86 ��+ \ O ^.• S� _ - _ " \ 6' \ 1 \\ \\ `\ AVOID UTILITY DAMAGE STANDARDS PART 1926 SUBPART P, OR AS AMENDED.
666
FES 40 0.13 AC. � /- -`-_ - ..
INV: �
669.88 �' \ ---- ---' 1 °' = b \
RIP RAP FOR INLET r*A� \ CB 10 0.79 AC. \\ i 1 COY)ttA-0 � \ ` � i\\ o LEGEND
PROTECTION °""� \ \ TC: 665.1 ' * g_ EET _ `> 0m CB -CATCH BASIN
\ INV IN: 659.16 TR
INV OUT: 659.
DCB
- DOUBLE CATCH BASIN
---.4M J- -
DI -
DROP INLET
\
rn _;- w -- - __- r---
"
CB 13 2.13 AC.
- --- 1
CB 16 0.13 AC.
o
DDI
-DOUBLE DROP INLET
_ _
TC: 666.2
INV IN(CB 16): 660.20
1
TC: 666.2
INV OUT: 661.96
MH
- MANHOLE
\ _
INV N(DI 12): 656.65
1
CA
to
FES
- FLARED END SECTION
HALT au --
^ \
INV OUT: 656.55
NOW OR FORMERLY
�,
INV
- INVERT
\-
DANIEL JOHN CARDELLI'
NOW OR FORMERLY
SILVIA G. CARDELLI
TC- TOP OF CURB
THOMAS D. BARTLETT
DEED:768-820
SDE- STORM DRAINAGE EASEMENT
JANET R. BARTLETT
PARCEL #05-110-003
n
XXX Ar' DRAINAGE BASIN TO E
S MT DEED:897-906 NOW OR FORMERLY
PARCE' #05-110-004
� \ , NOW
D. BARTLETT It
JANET R. BARTLETT
DEED:897-906
\, \ PARCEL #05-110-020
1 _
STREET I ----_
SIGN 1Y CLP L-__---
STOP\ \
SIGN0\
V \\
STONE \\
PLANTER
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1_
1
1
1
1
1 I
1
1
\ ROAO \ - T�STREET 236,
\� \ \ 9GN IRS STREW DEE258� 22
�\ qON
SIGN
--
4
TRACT 11)
DEED 739_66_
xAL
14906
v
y'�GIN��
��O..gMH�.�\����
ACH STRUCTURE
GRAPHIC SCALE
40 0 20 40 6o 160
( IN FEET )
I inch = 40 ft.
THIS PLAN IS A FINAL DRA KING -NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIALLED/DATED AS APPROVED:
APPROVED:
INI ALS /- r�
Approved 5tcrm. watar orm
Construction In N=5, , ;
- designer
NO,
DATE
InspoctRFiVl�dOt4tru hnn orti y cpnbrmtY
BY
PROJECT NO.
SHEET TITLE stormwater rutes.(15ANCAC 2H.1008(1))
Permit # S(1)� l �C')_do5 Date S. 2, ZoI1.
of WSW QDRAINAGE PLAN bShoot #"tg Revision Date �. 11�. 1 L
SCALE
EXTE 40'
7/24/15
PROJECT
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: DHD VENTURES
DRAWN BY
BTG
CHECKED
MAH BY
YARBROUGH-WILLIAMS & HOUI16 INC.
Planning 0 Surveying 0 Engineering
730 Ladaor Oak Court (28279) P.O. Box 7OD7 (2624I)
Chartotke, North CaroBue
"CIA61990 704.658.0505(fax)
DRAWING N0.
a�
5
SHT V OF 1 9SHTSI

I
I
I

I

�7. 1

ti
1
ti
4
4
Y
I
1

I
I
I
I

LLI
FES 101
INV: 644.80
V=6.7
L:14.0'x W:16.0 APRON , OJ
6.0" DIA. RIP RAP Q
10.0" MIN. DEPTH / , �" / /
FOREBAY
2
BOTTOM TOP OF SAND / /
R• FILTER = 649.00 r / f 650.00 \ /
-1 �,r.��,r�'i�•F 6-PVC
/ ! Q
b-PVC -y r i.
49 0.50X!
I r f- 1
TEMP. STORAGE
649 = 2,100 SF
650 = 4,900 SF
651 = 6,100 SF
652 = 7,500 SF
- 653 = 81700 SF
654 =10,000 SF
FOREBAY
650 = 2,060 SF
651 = 2,590 SF
SAND FILTER
649 = 1,560 SF
VOix'') ��1'�h • n
OUTLET BOX:�:��[=\
INV OUT 24" RCP= 644.96 / \\
_ /
SxS (OUTSIDE DIMENSIM
PFCOAST OONCiUTE RISM
1 24" RCP
1
.. 4
Surface Sand FilterCONCRETE ANCHOR
(see detan •A•) 6'x6'x1'
NOTE:
- PREPARE SUB -GRADE SURFACE AREA AS NOTED Scarified, ripped, or ANTISEEP COLLAR
Perforated 6' in.. PVC pipe trenched subgrade (SEE DETAIL 'C')
-THE UNDERDRAIN COLLECTION SYSTEM SHOULD BE EQUIPED WITH 6-INCH MINIMUM PERFORATED SCHEDULE 40 OR (lateral spaces at 10' O.C.)
STRONGER PVC PIPE OR DOUBLE WALL 'HOPE' PIPE. PERFORATIONS SHALL BE PER AASHTO CONCRETE ANCHOR
M278 FOR PVC PIPE, AASHTO M252 FOR DOUBLE WALL -HDPE- PIPE, OR BE 3/8-INCH-IN A. BOUYANCY
DIAMETER SPACED 3 INCHES ON CENTER ALONG 4 LONGITUDINAL ROWS THAT ARE SPACED AREA OF RISER -INSIDE 16 S.F./OUTSIDE 25 S.F.
90' APART. THE PIPES. SHALL HAVE A MINIMUM SLOPE OF 0.5096 AND A MAXIMUM SPACING yam,,,,, = Vlo + Veil. Fes= 8.14' (25 SF) + 1' (36 SF) = 239.5 CIF
CENTER
OF 10 FEET ON .
- FLOATATION = W.L..0 x Vear= 239.5 CIF x 62.40 LB/CF =. 14.944.8 LBS.
- CLEANOUTS OF 6-INCH SOLID PVC MUST BE PROVIDED FOR EVERY 50 LINEAR FEET OF UNDERDRAIN, AT ALL BENDS,
AND ENDS OF THE SYSTEM FOR MAINTENANCE PURPOSES. THE TOP OF THE CLEANOUTS B. COUNTER BOUYANCY
SHOULD EXTEND 6 INCHES ABOVE THE TOP OF FILTER AND HAVE A WATERTIGHT, VANDAL CONIC. Wt. = Vaa=Rbr+ Vc Fe&vx Conc. Unit Wt:. _ (73.26 + 36) x 150 LB/CF = 16,389 LBS.
PROOF CAP. AT LEAST ONE CLEANOUT SHALL BE INSTALLED AS AN EMERGENCY DRAIN THAT Earth Wt. on Ring = VF•nsx Earth Unit Wt. = (36 - 25) x 5.04 x 115 L.B/CF = 5,216.4 LBS.
IS FLUSH WITH THE TOP OF FILTER AND HAVE A 6-INCH THREADED EXTENSION PIPE. THE Anti -Floatation = 16,389 + 5,216.4=-21,605.4 LBS. (safety factor = 1.4)
FURTHEST CLEANOUT FROM THE OUTLET MUST HAVE THE MINIMUM REQUIRED FILTER DEPTH.
K�
a
A�.� Y
II=
111• aFAi PF�E MNC
Ilfl l�li=!Trig HMEETE
A
aaLtM
BACOU AREA OUTSIDE T f _' I II'' INSTALL V "M
or NORMAL, TRE1 M omme AROUND v
w 4/3 i'YE :d + 4'-e'
L0
PLAN VIEW
PPE
WE I.C.
fill
I I- ¢¢}}
VI '• �, ' - 2F
All
'il�t I�T[�11tFI.-
J1`ii
SECTION A -A
i.
WE
I I
BAOaBL AREA saw
NORMAI. PPE IEDOHO - s
a: OUT9OE OF NORW& tll- I _ IIE31 = NORM
AREA 11i it LINO
SECTION 8-8
(DR-20) CITY OF SACO
ANTISEEP COLLAR
N.T.S.
3- layer of\
washed
non -clay sod,
pea gravel or
,. rt y,:
Non -Woven
Filter Fabric
washed stone
2^"�'t,.�•''
d vJ1G x'.,yvl �g:�+j i �R � 2.-51�'S ;�>C
`
1'-6-. Sand Bed
`''"'`{., '"
Non -Woven
(ASTM C-33 Nedtum,zx
} 4","z r ry+_-3 e;.., t"s
Filter Fabric
aggregate concrete..
Non -Woven
Filter Fabric
12- min.
Impermeable Liner
where necessary
DETAIL •A"
Perforated 6" min.
PVC pipe
SURFACE SAND FILTER (lateral spaces at 10' D.C.)
GFNFRAL BMP MAINTENANCE TASKS
1. Emergency Maintenance shall be performed Immediately after floods and other emergencies. Replanting and repairs to structures may be necessary.
Obstructions and debris deposited should be removed immediately.
2. Regularly remove debris and litter.
3. Monitor BMP for sediment removal. Proper disposal of the sediment removed is required.
4. Maintain a healthy ground cover in and around the BMP to promote stability and erosion control.
5. Routinely inspect, exercise and provide preventative maintenance on all mechanical components.
6. Vegetation Maintenance shall include inspection fordistressed vegetation, bare spots, and rills. Treatment
of these areas and revegetation shall be immediate to .prevent spreading.
7. Maintain a permanent pool of water to promote a healthy aquatic environment.
8. Inspect and treat permanent pool for mosquitoes and other insects.
9. Immediately after the wet detention basin is established. The plants on the vegetated shelf and perimeter of the basin should be wateredtwiceweekly if
needed, until the plants become established (commonly six weeks).
10. No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf.
11. Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin.. -
12. If the basin must be drained for an emergency. or to perform maintenance, the flushingof sediment through the emergency drain should be minimized to
the maximum extent practical.
13. Once a year, a Professional Engineer should inspect the embankments.
14. Dewatering Pump: Piranha P200- 2 HP, 180 gpm or equal
STmicTufw
OUTSIDE
7-4•
RIP RAP
TRASH RACK DETAIL
STRUCTURE OUTSIDE
a' -a•
FRAME CENTER~I
1/4xl8*x4'-0
0 M VORTEX I
GALVANIZ=D STEEL GRATE
(--.T.T7Ve,M,
KY RAT
FRAME
ANCHOR
HOLES
/
3
----- rob '
/
/
/
,
/ n
/
\ i
DRAINAGE AREA MUST BE
\ STABILIZED BEFORE FILTRATION
\\\ CONTROLS AND FILTER MEDIA
I
\�\ ARE INSTALLED.
`-CLASS 1 RIP W
FOREBAY BERM SECTION
I
Sand Filter Operation Maintenance
A maintenance record shall be kept on this BMP. This maintenance record will be kept in a log in a known set
location. Any deficient BMP elements noted In the mspection will be corrected, repaired, or replaced
Immediately. These def cienCle5 can affect the integrity of structures, safety of the public, and the removal
efficiency of the BMP.
Important maintenance procedures:
- The drainage area will be carefully managed to reduce the sediment load to the sand filter.
- The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds 51X Inches.
- Once a year, sand media will be skimmed.
- The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter will be mspected quarterly and within 24 hours after every storm event greater than 1.0 mches (or
1.5 mches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and
will be available opon request.
Inspection actlVltles shall be performed a5 follows. Any problems that are found shall be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
Entire Bmp
Trash/debns Is prI55ent
Remove the trash/debns.
Adjacent pavement(If
Sediment Is present on the
Sweep or vacuum the sediment as soon as
applicable)
pavement surface
P0551ble.
Perimeter of sand filter
Areas of bare soil and/or erosive
Regrade- the soil if necessary to remove the
gulhe5 have formed
gully, and then plant a ground cover and
water intd it is established. Provide lime
and a one-time fertilizer application.
Vegetation 15 too short or too long
Maintain vegetation at an appropriate
heic1ht
Flow diversion structure
The structure Is clogged
Unclog the conveyance and dispose of any
sediment ofi its
The structure Is damaged
Make any necessary repairs or replace if
dame e is too lar e for repair.
Forebay or pretreatment
Sediment has accumulated to a depth
Search for the source of the sediment and
area
of greater than six inches
remedy the problem if possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause impacts
to streams or the BMP.
Erosion has occured
Provide additional erosion protection such
as reinforced turf matting or rprap if
needed to prevent future erosion problCM5.
Weeds are present
Remove the weeds, preferably by hand. If
a pesticide Is used, wipe it on the plants
rather than s rayin .
Filter bed and underdrain
Water is ponding on the surface for
Check to see if the collector system Is
collection system
more than 24 hours after a storm.
clogged and flush if necessary. If water
still ponds, remove the top few mches of
filter bed media and replace. If water still
onds, then consult an expert.
Outlet device
Gloggmg has occured.
Clean out the outlet device. Dispose of the
sediment offsite.
The outlet device Is dams ed
Repair or replace the outlet device.
Receiving water
Erosion or other signs of damage
Contact the NC Division of Water Quality
have occured at the outlet.
401 Oversight Unit at 919-733-1786.
Excavate the Basin Area and Prepare Subgrade
Clear and excavate the area for the Basin while protecting and maintaining subgrade infiltration rates using the
folllowing steps:
• , Excavate in dry subgrade conditions and avoid excavating immediately after storms without a sufficient
drying period.
• Do not allow equipment to cross the Basin area after excavation has begun
• Operate excavation equipment from outside the Basin area of from unexcavated portions of the area using
and excavation staging plan.
• Use equipment with tracks rather than tires to minimize soil compaction when equipment on the subgrade
surface is unavoidable.
• Dig the final 9 to 12 in. by using the teeth of the excavator bucket to loosen soil and do not smear the
subgrade soil surface. Final grading or smoothing of the subgrade should be done by hand if possible.
• Minimize the time between excavation and placement of the aggregate.
Tf1e nal subgrade slope shall not exceed 0.5% The slope of the subgrade shall be checked before proceeding.
Af
ter verifying the subgrade slope, scarify, rip or trench the soil subgrade surface to maintain the soils
ledisturbance infiltration rote. These treatments must occur while the soil is dry. To scarify the surface, use
b¢ckhoe bucket's teeth to rake the surface of the subgrade. To rip the subgrade, use a subsoil ripper to
make parallel rips 6 to 9 in. deep spaced 3 ft apart along the length of the basin excavation. In silty or
cl yey soils, clean coarse sand must be placed over the ripped surface to keep it free -flowing. The sand
layer should be adequate to fill the rips.
Ai alternate to scarification and ripping is trenching. If trenching, then parallel trenches 12 in. wide by 12 in.
deep shall be made along the length of the basin excavation. Excavate trenches every 6 ft (measured from
ceinter to center of each trench) and fill with 1/2 in. of clean course sand and 11-1/2 in of ASTM No. 67
aggregate.
I
Ripped or trenched (uncompacted) soil subgrade can settle after basin installation and compaction. Therefore,
b�se compaction requires special attention to means and methods in the specifications and during construction
inspection to minimize future settlement from ripped or trenched soil subgrades.
SEE TRASH RACK DETAIL
I
TOP OF OUTLET BOX
INV. = 653.10
4' PRIMARY WEIR
INV. = 652.00
GRAPHIC SCALE
( IN FEET )
1 inch = 20 J!L
THIS PLAN IS A FINAL BRA KING -NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIAL KLATED
AS APPROVED:
APPROVED:rn
� ;..•5lfn •PI£rn1M1!•BeIeMMM'
' n in acrAr , 'n h', u
required by the s m v -:, ... eel r
rotes read.' „ ,,; if conformitywin
n cart: ccnpllenos wim um
ginrmy,ater ruses, (15A N
s
- -_ Revision
NO.
DATE
REVISION
BY
SHEET TITLE
PROJECT ND.
SAND FILTER DETAIL SHEET
SCALE
1 "=20'
DATE
7/24/15
PROJECT
DRAWN BY
BTG
COTTON FLATS
M KE BY
TOWN OF WAXHAW, UNION COUNTY, N.C.
AH
FOR: DHD VENTURES
YARBROUGHWIT-r UMS Be HOUIJ6 INC.
DRAWING NO.
qW Plashing a Surveying a Engineering
730 iindsor Oak Court (MM) P.O. Box 700'1 (28241)
A ✓_°
Charlotte, Barth Cerolim
704.556.1990 704.556.0505(taz)
SHT 11OF 19SHT

00.50% i
/
u I \ / /
i 4' x 4' (INSIDE DIM.)
I Jill / OUTLET BOX \\ y
INV OUT 24" RCP=-644-96-645
I I
Cr
I b7
it I,1 I DO/ / v�'- - - - Iice.
w --- \v DRAINAGE AREA MUST BE
Z -- ----- — ---
I , / _ _. STABILIZED BEFORE FILTRATION
CONTROLS AND FILTER MEDIA
ARE INSTALLED...
Sand Filter Operation Maintenance
A maintenance record shall be kept on this BMP. This maintenance record will be kept in a log in a known set
location. Any deficient BMP elements noted in the Inspection will be corrected, repaired, or replaced
immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal
efficiency of the BMP.
Important maintenance procedures:
The drainage area will be carefully managed to reduce the sediment load to the sand filter.
- The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds suc inches.
- Once a year, sand media will be skimmed.
- The sand filter media will be replaced whenever it fads to function properly after maintenance.
The Band filter will be Inspected quarterly and within 24 hours after every storm event greater than 1.0 Inches (or
1 .5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and
will be available opon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
Entire Bm
Trash/debris is present
Remove the tra5h/debr15.
Adjacent pavement(if
5ediment is present on the
Sweep or vacuum the sediment as soon as
applicable)
pavement surface
ossible.
Perimeter of sand filter
Areas of bare soil and/or erosive
Reedrade the soil if necessary to remove the
gullies have formed
gully, and then plant aground cover and
water mtil It is established. Provide lime
and a'one-time fertilizer application.
Vegetation is too short or too long
Maintain vegetation at an appropriate
height
Flow diversion structure
The structure 15 clogged
Unclog the conveyance and dispose of any
sediment ofisite
The structure is damaged
Make any necessary repairs or replace if
dams a Is too larcie for repair.
Forebay or pretreatment
Sediment has accumulated to a depth
Search for the source of the sediment and
area
of greater than six inches
remedy the problem If possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause Impacts
to streams or the BMP.
Erosion has occured
Provide additional erosion protection such
as reinforced turf matting or riprap if
needed to prevent future erosion problems.
Weeds are present
Remove the weeds, preferably by hand. If
a pesticide Is used, wipe it on the plants
rather than s r n .
Filter bed and undercirain
Water Is ponding on the surface or
Check to see If the collector system is
collection system '-
more than 24 hours after a storm.
clogged and flush if necessary. If water
still ponds, remove the top few inches of
filter bed media and replace. If water still
ponds, then consult an ex art.
Outlet device
Clogging has occured.
Clean out the outlet device. Dispose of the
sediment offsite.
The outlet device is damaged
Re av or re lace the outlet dev ce.
Receiving water
Erosion or other signs of damage
Contact the NC Division of Water Quality
have occured at the outlet.
401 Oversight Unit at 919-733-175G
'- -- _-, _
: — • .. . .a' .�-.�. • � -. .:1 •. I ice\ /-•.
"- ' - --- Excavate the Basin Area and Prepare Subgrade
Clear and excavate the area for the Basin while protecting and maintaining subgrade infiltration rates using the
Sxb (OUTSIDE DIMENSION) following steps:
PRECASrOONCREIEf • Excavate in dry subgrade conditions and avoid excavating immediately after storms without a sufficient
-
o Rap
Frebay germ Af (per plan)
5' ...Top of Berrn.: drying period. .. -
6FikeB 654 00 • Do not allow equipment to cross the Basin area after excavation has begun
An (per pion) 3'
• Operate excavation equipment from outside the Basin area of from unexcavated portions of the area using
T
ypical t
- RIP RAP APRON (par pion) Typical
and excavation staging plan.
- � -
- Tempos Pod for wov
• Use equipment with tracks rather than tires to minimize soil compaction when equipment on the subgrade
INFLOW FLAT ,_ t �— t dope— FIAT
3 t 3 l t surface is unavoidable.
• Dig the final 9 to 12 in. by using the teeth of the excavator bucket to loosen soil and do not smear the
' , subgrade soil surface. Final gradingor smoothingof the subgrade should be done b hand if possible.
a RCP Y
a
t
1 24" - Minimize the time between excavation and placement of the aggregate.
P g9 g
RIP RAP
- Surface Sand Filter -
CONCRETE ANCHOR The final subgrade slope shall not exceed 0.5X The slope of the subgrade shall be checked before proceeding.
-
NOTE: (see, detail 'A")
61x61x11. _
-PREPARE SUB -GRADE SURFACE AREA AS NOTED _ � Perforated 6 min. PVC pipe tren
..
ANTI SEEP COLLAR After verifying the subgrade slope, scarify, rip or trench the soil subgrade surface to maintain the soils
eel ripped, a SEE DETAIL C - -
ad ( ) predisturbance infiltration rate. These treatments must occur while the soil is dry. To scarify the surface,
: SHOULD BE D WITH-6-INCH MINIMUM SCHEDULE 40 (lateral spaces at to o.cJ
UNDERDRAIN COLLECTION. ER
subgrade use
backhoe. bucket's. teeth to rake the surface of the sub rode. To ri the sub rode use a subsoil ri er to
9 P 9 PP
STRO-THE
PERFORATIONS SHALL S
O L PERFOR"
PVC PIPE OR DOUBL
- PVC DOUBLE PER AASHTO '..CONCRETE ANCHOR
.'HDOUBLE
- � make parallel rips 6 to 9 in. deep spaced 3 .ft apart along the length of the basin excavation. In silty or
- -
PIPE, RB3 INCH IN
M278 FOR 252 F DOUBLE W PIPE,
MAMETER PVC PIPE,
A. BOEAAOCY
€ - - _
_ -- clayey soils, clean coarse sand must be placed over the ripped surface to keep it free —flowing. The sand
LONGITUDINAL AT ARE
DIAMETER SPACED 3 INCHES ON CENTER ALONG 4 LONGITUDINAL ROWS THAT ARE SPACED
INCHES N CENTER
90"APART.THE PIPES SHALL HAVE A MINIMUM SLOPE OF 0.50%AND A MAXIMUM SPACING AREAOF.RISBR
jlayer should be ado p
-INSIDE 16 S.F./OUTSIDE S.F.S:. - - y quote to fill the-ri s. :
OF 10 FEET ON CENTER. View" = WRrr
Vss r aI.= 8.14' (25 SF) + 1' (36 SF) = 239,5 CF
- - FLOATATION -
VR.m.Ex Viee.= 239.5. CF x 62.40 LB/CF-= 14,944.8IRS_ - - An alternate to scarification and ripping is trenching. If trenching, then parallel trenches 12 in. wide by 12 in.
- CLEANOUTS OF 6-INCH SOLID PVC MUST BE PROVIDED FOR EVERY 50 LINEAR FEET OF UNDERDRAIN, AT ALL BENDS, -
_
deep shall be made along the length of the basin excavation. Excavate trenches every 6 ft (measured from
AND ENDS OF THE SYSTEM FOR MAINTENANCE PURPOSES. THE TOP OF THE CLEANOUTS B. COUNTER BOU
SHOULD EXTEND 6 INCHES ABOVE. THE TOP OF FILTER AND HAVE A WATERTIGHT, VANDAL CONC. Wt. =
ANCY :
j(Vcm err+ Vo.,r: F evx Conc..Unit Wt. _ (73.26 + 36) x 150 LB/CF = 16,389 LBS. - - - - : o center to center of each trench) and fill with 1 : /2 in, of clean course sand and 11-1 /2 in of ASTM No. 67
-
PROOF CAP. AT LEAST ONE CLEANOUT SHALL BE INSTALLED AS AN EMERGENCY DRAIN THAT " Earth Wt. on iRing
= Via x Earth Unit. Wt. = (36 - 25) x 5.04 x 115 LB/CF = 5,216.4 LBS. - - - _ aggregate. -
IS FLUSH WITH THE TOP OF FILTER AND HAVE A 6-INCH THREADED EXTENSION PIPE. THE Anti-Flootati
n = 16,389 + 5.216.4 = 21.605.4 LSS. (safety factor = 1.4)
FURTHEST CLEANOUT FROM THE OUTLET MUST HAVE THE MINIMUM REQUIRED FILTER DEPTH.
Ripped or trenched (uncompacted) soil subgrade can settle after basin installation and compaction. Therefore,
base compaction requires special attention to means and methods in the specifications and during construction
inspection to minimize future settlement from ripped or trenched soil subgrades.
3" layer of
washed
non -clay sod, t �-.r < -.... ri Non -Woven
ea ravel or chi„z '^` - Fllter Fabric - - -
washed stone'£ SEE T
V-6" Sand .Bed Non -Woven
: (ASTM C-33 Medium .x.s';� x - Fllter Fabric - - -
a r ate concrete
sand) +��v TOP OF OUTLET
INV.= $63:49
65jJU
Nei -Woven
: Filter - Fabric :
,2' min. Impermeable Liner TRASH RACK DETAIL 4'PRIMARYWEIR
_
a • - where necessary _ _ INV. =s'8�
2.7
DETAIL A Palrforatea 6• min. PVC pipe
SURFACE SAND FILTER (I teral spaces at 10' D.C.)
STRUCTURE OUTSIDE
7-4•
GENERAL BMP MAINTENANCE TASKS i g
1. Emergency Maintenance shall be performed immediately after floods and other emergencies.. Replanting and repairs to structures may be necessary.:. - FRAME_ CENTERt!h0` •���
Obstructions and debris deposited should be removed immediately... V _ .�. �O -S yr p
•
�
2. Regularly. remove debris. and litter. - OF •. y .e
S
3. Monitor BMP for sediment removal. Proper disposal of the sediment removed Is required. SEAL -Z
f • • r- L- 3954
4. Maintain. a healthy ground cover in and around the BMP to promote sta601ty and erosion control.
F _ -
5. Routinely inspect. exercise and provide preventative maintenance on all mechanical components. - _ - �'+ A Qe:: q°--•lr�`°�,�`
6. Vegetation Maintenance shall include inspection. for distressed vegetation,.bare spots, and rills. Treatment MIN
INSIDE �� OUTSIDE ar s� - ,,�ra� atwNi),• � fil �1
of these areas and revegetation shall be immediate to prevent spreading.IT
7, Maintain a permanent pool of water to promote a healthy aquatic envir I ment. TTOP OF 9Etoi
8. Inspect and treat permanent pool for mosquitoes and other insects. B/6• OP OF PERMANENT pool $
9. Immediately after the wet detention basin is established. The. plants on he vegetated. shelf and perimeter of the basin should be watered twice weekly if • - BOTrON OF -
needed, until the plants become established (commonly six weeks). : : - - - FOREDAAY
## /2' DDT BARS CLASS t RP RAP
10. No portion of the wet detention pond should be fertilized after the fire initial fertilization that is required to establish the `plants on the vegetated shelf. - tANTI VORTEX PLATE ON e• O.C.
11. Stable groundcover-should be maintained In the drainage area to reduce thesediment load to thewetdetention basin..: FOREBAY BERM SECTION
12. If the basin must be drained for an emergency or to perform mainten ce, the flushing of sediment through the emergency drain should be minimized to
the maximum extent practical. - - - T/4l T .•i
13. Once a year, a Professional .Engineer should Inspect the embankments. eAA
SEAL
14. Dewatering Pump: Piranha P200- 2HP, .180 gpmor.equal 14906
- .:GALVANIZED STEEL GRATE - - -
x -ll i��-zP:F!vGIN��3
1111111111
GRAPHIC SCALE
20 .0
( IN FEET )
I inch = 20 tL
THIS PLAN IS A FINAL BRA FING-NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIAL IDATEDAS APPROVED:
APPROVED /jvIl
I AI S VATE
eo
2
: 07/0e/i7
REIM D PER aJMT REMIESIa
WIN
7
06127AG
REYIS D PEA Commons
Ywi
NO..
DATE
REVISION
BY
SHEET TITLE
SAND FILTER
AS BUILT DETAIL SHEET
Fffi2iffcT Na
N 20
7/24/15
PROJECT
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: WAXHAW MILL VENTURES, LLC
BTG
UVMaH BY
iARBRouGH W S' & BOUT.$, INC.
Planxing o Sxrveylxg a Bxgineering
P.O. Box 7007 (2B'd41)
730 radsor 0 CourtCharlotte. North
704.b68. M 7044 � La:)
RA v1Ne Na
249-36
SNT "OF 19

�
Sand FIItor Operation I n Ma
intenance
FES 101 51 5F_
INV:-644.8&6451
.• , '. A • .
/ 650 4;986-sF 694 SF A maintenance record shall be kepton this BMP. This maintenance record will be keptm a I in a known set
' , , y. ' / location. An deficient BMP elements noted m the inspection will be corrected, repaired, or re laced
O x W.16.0 APRON / i1 ;05 60' / 5 8 n 651 - �-68-SF 5 087 .SF Y L.14 TOP OF DAY � , p p P
„ / ,� -J ' � � immediately.. These deficiencies can affect the integrity of structures, safety of the public, and the removal
6.0 DIA. RIP RAP /I /6' ��..✓ / �� i 652 = �,568-5
,5 0 // �" 611 SF efficiency of the BMP.
10.0" MIN. 'DEPTH / � / / ,' ,/ {
/ / / i / -_ i' 653 =AfeO F' 7, 922 SF Important maintenance procedures:
654 10.�-BF - The drainage area will be carefully managed to reduce the sediment load to the sand filter.
_ 134 SF
� � / '; � -The sedimentation chamber or forebay will be leaned out whenever sediment depth exceeds six inches.
_ ' , \ / , ( FOREBAY - Once a year, sand media will be skimmed.
I - The sand filter media will be replaced whenever it fads to function property after maintenance.
/ \ 650 --2;066-6F 1,102 SF
/ \
' - - , , i - ! / i 651 F 1 656 SF The sand filter will be inspected quarterly and within 24 hours after every storm event greater than 1 .O Inches (or
l / _
1.5 inches if m a Coastal County). Records of operation and maintenance will be kept in a known set location and
it
, \\ 652 - 2,A645 Sf' will be avahabie o on re uest.
l - ; FOREBAY = p
/ /-
SAND FILTER Inspection activities shall be performed as follows. An problems that are found shall be repaired immediately.
�, :. BOTTOM = \ / I P p Y P p Y
TOP OF SAND ' , Q 649 1-,,560 6F 1, 551 SF
FILTER- ,� �0,.- •. / \ / ---- ` / BMP element: Potential problem: How I will remediate the problem:
I I I ,. F.: �S`:' / e.:... ..F ...f.::•. ;1:. �j \ _ , _ En it m
�� ��P RAP
t e B Trash/debris is resent Remove the trastVdebris.
n \ i` Adjacent pavement(if Sediment is present on the Sweep or vacuum the sediment as soon as
/ / `� :u:�+■ "� ; , 6"PVC /' `:., /: .!, 52. 00 , applicable) pavement surface ossible.
Perimeter of sand filter Areas of bare sod and/or erosive Per�rade the soil if necessary to remove the
ulbes have formed gully, and then plant a round cover and.
o.SOX 61
g 9 iY, p 9
/ water Intl it is established. Provide lime
and a one-time fertilizer application.
Vegetation is too short or too long Maintain vegetation at an appropriate
bet lit
Flow diversion structure The structure 15 clogged Unclog the conveyance and dispose of any
III III- / \ /
��� ediment offsite
The structure 15 damaged Make any necessary repairs or replace if
It
i it I \✓ '/ ,'\\ ' ( ()� , dama e is too lar a for repair.
j ' ' V / Forebay or pretreatment Sediment has accumulated to a depth 5earch for the source of the sediment and
I if 4' X 4' (INSIDE DIM.) 5.3 Q3 / Y \\ area of greater than six inches remedy the problem if possible. Remove
11 OUTLET BOX ' the sediment and stabilize or dispose of it
I i \ + in a location where it will not cause impacts
n INV OUT 24" RCP = 44436-645.
to streams or the BMP.
Erosion has occured Provide additional erosion protection such
as reinforced turf matting or nprap if
needed to prevent future erosion problems.
Weeds are present Remove the weeds, preferably by hand. If
I f I I /� - ✓ tl / / \- _ - - - a pesticide is used, wire it on the plants
6 15 rather thanspraying
.
i I .. , �� �� i' �- + �: '\-_ -%� I \\ / �• ; - Filter bed and underdram Water is ponding on the surface for Check to see i the collector system is
collection system more than 24 hours after a storm. clogged and flush if necessary. If water
' still ponds, remove the top few inches of
I I , - / r , ' / /. �� / / •--- ' - '..\\ i - / - - filter bed media and replace. If water still
i _ - -; ' ponds, then consult an expert.
------'J- '/-----------� � , 11 \\ i Outlet device Clogging has occured. Clean out the outlet device. Dispose of the
1 iOf
DO/ ---- ' / i \\ i sediment off5ite.
----
i W i ---- "__ _ -- / \\ DRAINAGE AREA MUST BE The outlet deuce is damaged Re air or re lace the outlet device.
I I / ____---- - - / �� ! '�� _ / �� Receiving water Erosion or other signs of damage Contact the NC Division o Water Quality
i Z u1, f '' l _ / ,/ / `-- I �\ STABILIZED BEFORE FILTRATION have occured at the outlet. 401 Oversight Umt at 9I 9-733- 1786.
.I
f F-/� / --- \ ----I f \\
f � - � ; j - - � � r ,/ ;- � , ,_ � , \ CONTROLS AND FILTER MEDIA
- - , ;' - \ ARE INSTALLED.
i Excavate the Basin Area and Prepare Subgrade
Clear and excavate the area for the Basin while protecting and maintaining subgrade infiltration rates usingthe
SxS(O(fiBDEDMB4�0l0 following steps:
PFECASrOONCiEiEf1119FA Excavate in dry subgrade conditions and avoid excavating immediately after storms without a sufficient
Rip Rap 6, Top of Berm drying period.
Forebay Bem1 Af (par Plan) - 65•k'N654. 00 Do not allow equipment to cross. the Basin area after excavation has begun
As (per plan) 3' _ - • Operate excavation equipment from outside the Basin area of from unexcavoted portions of the area using
asanaut - _ and excavation staging plan. ' -
RIP RAP APRON (per plan) Temporary Pool far WQV Typical Use equipment with tracks rather than tires to minimize soil compaction when equipment on the subgrade
- - - -
1 3 surface is unavoidable.
INFLOW FLAT elo ,- 1 -� 1 eloper FLAT 3 --11 • Dig the final 9 to 12 in. by using the teeth of the excavator bucket to loosen soil and do not smear the
1 ed? _ r - ,?.: r : x T subgrade soil surface. Final grading or smoothing of the subgrade should be done by hand if possible.
L* ,ram , x , . 1 2e RCP Minimize the time between excavation and placement of the aggregate.
T P
RIP .RAP
surface sand Fatw ` k CONCRETE ANCHOR The final subgrade slope shall not exceed 0.5X The slope of the subgrade shall be checked before proceeding.
- - (nee detail 'A') - 6•x•�, -
NOTE: ANns� COLLAR After verifying the subgrade slope, scarify, rip or trench the soil subgrade surface to maintain the soils
- PREPARE SUB -GRADE SURFACE AREA AS NOTED - Perforated 6' min. PVC pipe tren ScarInd• ripped, or
(SEE DETAIL -c') _ _ - - predisturbance infiltration rate. These treatments must occur while the soil is dry. To scarify the surface, use
Y
-THE UNDERDRAIN COLLESTiON SYSTEM SHOULD BE DOUBLE
D L "HOPE"
MINIMUM PERFORATED SCHEDULE 40 S (lateral spaces at 10' o.c.) - _ backhoe bucket's teeth to rake the surface of the subgrade. To rip the subgrade, use a subsoil ripper to
STRONGER PVC PIPE OR DOUBLE WALL 'HDPE' PIPE. PERFORATIONS SHALL BE PER AASHTO make parallel rips 6 to 9 in. deep spaced 3 ft apart along the length of the basin excavation. In s t or
M278 FOR PVC PIPE, AASHTO M252 FOR DOUBLE WALL "HDPE" PIPE, OR BE 3/8-INCH IN CONCRETE ANCHOR P 9 9 y
clayey soils, clean coarse sand must be placed over the ripped surface to keep it free -flowing. The sand
.DIAMETER SPACED 3 INCHES ON CENTER ALONG 4 LONGITUDINAL ROWS THAT ARE SPACED A. BOUYANCY
90• APART. THE PIPES SHALL HAVE A MINIMUM SLOPE OF 0.50% AND A MAXIMUM SPACING AREA OF RISER - INSIDE 16:S.F./OUTSIDE 25 S.F. - - - - layer should be adequate to fill the -rips.- OF 10 FEET ON CENTER. WIN+ = VRL,. Va.. Founi 8.14' (25 SO + 1' (36 SF) = 239,5 CF
FLOATATION = \AAI x Viti 239.5 CF x 62.40 LB/CF = 14_944_8 �9s- An alternate to scarification and ripping is trenching. If trenching, then parallel trenches 12 in. wide by 12 in.
CLEANOUTS OF 6-INCH SOLID PVC MUST BE PROVIDED FOR EVERY 50 LINEAR FEET OF UNDERDRAIN, AT ALL BENDS, deep shall be made along the length of the basin excavation. Excavate trenches ever 6 ft measured from
AND ENDS OF THE SYSTEM FOR MAINTENANCE PURPOSES. THE TOP OF THE CLEANOUTS B. COUNTER BOU ANCY Y
SHOULD EXTEND 6 INCHES ABOVE THE TOP OF FILTER AND HAVE A WATERTIGHT, VANDAL CONC. Wt. = (j(l'�,'.me mw+ Va:iFasi Conc. Unit Wt. = (73.26 + 36) x-150 LB/CF = 16.389 LBS. - - center to center of each trench) and fill with 1/2 in. of clean course sand and 11-1/2 in of ASTM No. 67
PROOF CAP. AT LEAST ONE CLEANOUT: SHALL BE INSTALLED AS AN EMERGENCY DRAIN THAT - Earth Wt. on Ring-- = VF=mx Earth Unit Wt. = (36 -: 25)- x.5.04 x 115 LB/CF = 5,216.4 LBS. - : - : aggregate. -.
IS FLUSH WITH THE TOP OF FILTER AND HAVE A 6-INCH THREADED EXTENSION PIPE. THE Anti-Rootati = 16,389 + 5,216.4 = 21,605.4 LBS. (safety factor _ 1.4)
FURTHEST CLEANOUT FROM THE OUTLET MUST HAVE THE MINIMUM REQUIRED FILTER DEPTH. Ripped or trenched (uncompacted) soil subgrade can settle after basin installation and compaction. Therefore,
base compaction requires special attention to means and methods in the s ecifications and durin const t'
p g ruc inspection to minimize future settlement from ripped or trenched soil subgrades. on
3` layer of L -
washed -ilt` .-i--In-,.-11-
non -Gay sod. t s t Non -Woven -
pea gravel or %; i:C. r/�,;: '�'" -. '. 5`; Filter Fabric - - -
washed stone r f SEE T
1'-6 Sand Bed t` ,,'�"3r=r >'> '.z '" Non -Woven -
. (ASTM C-33 Medium Filter Fabric
aggregate concrete F''' TOP OF OUTLET
sand).. 3/;� s 668.49
INV. _
r� K
tt�:
.�;yt.. `�,a,,.'•x z�-�- irr_,.. Non -Woven - -
Filter Fabric -
12" mir. TRASH RACK DETAIL 4'PRIMARYWEIR
Impermeable Liner
where necessary INV. =652-R55222
DETAIL Ni Perforated 6' min. PVC pipe 'U
SURFACE SAND FILTER (1 teral spaces at 10' D.C.) _
SIOUCTLME.OU190E ..
T _ r
_ ,,.a.renrr,ej
GENERAL BMP MAINTENANCE TgCKC - - FRAME ��
1. Emergency Maintenance shall be performed immediately after floods and Liner emergeneles. Replanting and repairs to -structures may be necessary. � � ,�J fr,� � ,•,�� O` •<•�
Obstructions and debris deposited should be removed immediately. `.
2. Regularly remove debris and litter. 1. • _. �O•QFz S ''.,�.�1r•
SEAL
3. Monitor BMP for sediment removal. Proper disposal of the sediment removed is required. - Sf L14
4. Maintain a healthy ground cover in and around the BMP to promote stability: and erosion control. W -�
b. Routinely inspect, exercise and provide preventative maintenance on all mechanical components. STRUCTURE 0*..
8. Vegetation Maintenance shall include Inspection for. distressed vegetation, bare spots, and rills. Treatment OUTS_ INSIDE FRAME 0317ER- 3-a' NN •��.�F„wHP�
of these areas and revegetation shall be Immediate to: prevent spreading. 7 4.IT
IRM
7. Maintain a permanent pool of water topromotea. healthy aquatic envir�) iment - 70P OF BERM (�
I :. -' T'DP OF PERMANENT Pool g (•
8. inspect and treat permanent pool for mosquitoes and other insects. 6�' V`
y
9. immediately after the wet detention basin is established. The plants on he vegetated shelf and perimeter of the basin should be watered twice weekly if • BOTTOM OF
needed, until the plants become established (commonly six weeks). - .FOREBAY -
-10. No portion of the wet detention pond should be -fertilized after the flrsi Initial fertilization that. Is required to -establish the plants on the --- t - eq P vegetated shelf. twniAwRiEN PLATE > �1xw O.C.
1L Stable groundcover should be maintained in the drainage area to reduc$({ the sediment load to..the wet detention basin. - FOREBAY BERM SECTION - -
12. Ifthe basin -must be .drained for anemergency or to perform. maintendnce,'.the flushing of sediment throughtheemergency drain should be minimized to E _
the maximum extent practical. -
E/•t x3' MT
13 Once a year, a Professional Engineer should inspect the embankments. - EAR FBAUE - - -
SEAL -
14. Dewatering Pump: Piranha P200- 2 HP, 180 gpmorequal 1490(
I - GALVANIZED STEEL -GRATE - -
I �/n,AMHOi.v��,
GRAPHIC SCALE
( IN FEET )
I inch = 20 R.
THIS PLAN IS A FINAL BRA IFING-NOT
RELEASED FOR CONSTRUCTION
UNLESS INITIAL DATED A APPROVED:
APPROVER
aLFs
2
: 01/0111
REVISED PER CLIENT REQUESTS
YWi
1
06/27/10
REY= PER COMMENTS
y"t
NO..
DATE
REVISIDN -
BY
SHEET TITLE
SAND FILTER
AS -BUILT DETAIL SHEET
PROJECT
DAT� 20'
7/24/15
PROJECT
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: WAXHAW MILL VENTURES, LTC
RAWN BY
BTG
Num BY
MAH
.
YARBROUGHWEUIJAMB di: HouullS INc.
Planning a Surveying a Enginelf ins
790 1Rndam 0 �( ft) Poum 7087 (282N)
70ILMA900- 704.556.0505(faz)
nRAvuf6 Na
249-36
SMrii�19

i
W --r•
TEMP. STORAGE
FES 101 _ — fi( • —29400 1 51 SF
_ - 649--6F- ,
INV:
_ �- /i .: •4 650 =9eSF- .� 694 SF
V-6.T s r
r /� / /%: -
• 16.0 APRON / 05 6f 8 651 — $-489-SF
L.14.o X w. TdP OF DAM � � 5 5, 087 SF
r
6.0 DIA. RIP RAP r , ✓ ; GJ
652=7,366-SF- 6( 611 SF
10.0 MIN. DEPTH {
653="8196-8F 4.922 SF
.01
654 -10,000 &F 134 SF
FOREBAY
650 = 3,066 &F
\� I, 1,1102 SF
651 9` vF 1858 SF
2.645 SF
n OUTLET BOX : ^
INV OUT 24" RCP= —& . 645
i0 r
, r
--- --
ao/ ------ _ V' DRAINAGE AREA MUST BE
,�j \ STABILIZED BEFORE FILTRATION
fv-y I i Ej --- \ CONTROLS AND FILTER MEDIA
--- ; ARE INSTALLED. '
Sand Filter Operation Maintenance
A maintenance record shall be kept on this BMP. This maintenance record will be kept in a log in a known set
location. Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced
immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal
efficiency of the BMP.
Important maintenance procedures:
The drainage area will be carefully managed to reduce the sediment load to the sand filter.
- The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds six Inches.
- Once a year, sand media will be skimmed.
- The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter will be inspected quarterly and wnthin 24 hours after everystorm event greater than 1.0 inches (or
1.5 inches if In a Coastal County). Records of operation and maintenance will be kept in a known set location and
will be available opon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
BMP element:
Potential proll
How I will remediate theproblem:
Entire 13mp
Trash/del is present
Remove the trash/cli
Adjacent pavemerill
Sediment is present on the
5weep or vacuum the sediment as soon a; —
applicable)
pavement surface
ossible.
Perimeter of sand filter
Areas of bare soil and/or erosive
Relrade the sod if necessary to remove the
gullies have formed
gully, and then plant a ground cover and
water intd it is established. Provide lime
and a one-time fertilizer application.
Vegetation is too short or too long
Maintain vegetation at an appropriate
heicift
Flow diversion structure
The structure is clogged
Unclog the conveyance and dispose of any
Sediment offeite
The structure is damaged
Make any necessary repairs or replace if
dams a is too lam a for repair.
Forebay or pretreatment
Sediment has accumulated to a depth
Search for the source of the sediment and
area
of greater than six inches
remedy the problem If possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause Impacts
to streams or the BMP.
Erosion has occured
Provide additional erosion protection such
as reinforced turf matting or nprap if
needed to Prevent future erosion problems.
Weeds are present
Remove the weeds, preferably by hand. If
a pesticide is used, wipe it on the plants
I r than s ray n .
Filter bed and underdrain
Water is ponding on the surface for
Check to see if the collector system is
collection system
more than 24 hours after a storm.
clogged and flush if necessary. If water
still ponds, remove the top few inches of
filter bed media and replace. If water still
onds, then consult an ex ert.
Outlet device
Clogging has occured.
Clean out the outlet device. Dispose of the
sediment offsite.
The outlet device is dams ed
Repair or re lace the outlet device.
Receiving water
Erosion or other signs of damage
Contact the NC Division of Water Quality
have occured at the outlet.
401 Oversight Unit at 919-733-1786.
Excavate the Basin Area and Prepare Subgrade
Clear and excavate the area for the Basin while protecting and maintaining subgrade infiltration rates using the
5W (OUI'BDE DMIENNOPD fallowing steps:
j{
IFECASTCONCIFIllFi(8Hi - • Excavate in dry subgradeconditions and avoidexcavating immediately after storms without a sufficient
Rip Rap
I 6, , Top of Berm... drying period.
Foreboy Berm Af (i wan)
e6+ee 65400 0 Do not allow equipment to cross the Basin area after excavation has begun
As (per Plan) 3'
: • Operate excavation equipment from outside the Basin area of from unexcavated portions of the area using
ciemout
- .:
RIP RAP APRON (per Plan)Typical
and excavation stagingplan.
- - - -
Tem ry Paoli for WQV
Use equipment with tracks rather than tires to minimize soil compaction when equipment on the subgrade
INFLOW FLAT u e— 1� —�1 elope— FLAT
�t ,
�
Dig
• Dfthe finale9 to12in. by using the teeth of the excavator bucket to loosen soil and do not smear the
{ subgrade soil surface. Final grading or smoothing of the subgrade should be done by hand if possible.
1 -
, 24• RCP • Minimize the time between excavation and placement of the aggregate.
. RIP RAP
Surface Sand Fitter
CONCRETE ANCHOR The final subgrade slope shall not exceed 0.5X The slope of the subgrade shall be checked before proceeding.
- (See detail "A")
NOTE:
I 61x6'x1'
- PREPARE SUB -GRADE SURFACE AREA AS NOTED Perforated 6" min. PVC pipe Scared,
tree
ripped, or ANTISEEP COLLAR After verifying the subgrade slope, scarify, rip or trench the soil subgrade surface to maintain the soils
(SEE DETAIL a") infiltration rate. These treatments the is
(lateral spaces at 10' o.a)
ed subgrade predisturbance must occur while soil dry. To scarify the surface, use
-THE UNDERDRAIN COLLECTION. SYSTEM SHOULD BE EQUIPED WITH-6-INCH MINIMUM PERFORATED SCHEDULE 40 OR
- backhoe bucket's teeth to rake the surface of the subgrade. TO ripthe subgrade, use a subsoil ripper to
PP
STRONGER PVC PIPE OR DOUBLE WALL HDPE - PIPE. PERFORATIONS SHALL BE PER AASHTO
"HDPE" ..CONCRETE ANCHOR
deep
make parallel rips 6 to 9 in. des spaced 3 ft apart aloe the length of thebasinexcavation.
- sp c si ion.. In silty or
M278' FOR PVC PIPE, AASHTO M252 FOR DOUBLE WALL PIPE, OR BE 3/8-INCH IN
A.'BOUYANCY
clays soils) clean coarse sand placed over then ripped surface to keep free - flowing.
y P pP p free flowing. The sand
.DIAMETER SPACED 3 INCHES ON CENTER ALONG 4 LONGITUDINAL ROWS THAT ARE SPACED
AREA: OF RISIiR
-
- INSIDE 16- S.F./OUTSIDE -25 S.F. - layer should be adequate to fill the -rips.
90' APART. THE PIPES SHALL HAVE A MINIMUM SLOPE OF 0.5OX AND A MAXIMUM SPACING
V• = View
Veen feeene= 8.14' (25 SF) +1' (36 SF) = 239,5 CIF
OF 10 FEET ON CENTER.
FLOATATION
%N m x V•rt.= 239.5 CF x 62.40 LB/CF = 14,944.8 Les. An alternate to scarification and ripping is trenching. If trenching, then parallel trenches 12 in. wide by 12 in.
- CLEANOUTS OF 6-INCH SOLID PVC MUST BE PROVIDED FOR EVERY 50 LINEAR FEET OF UNDERDRAIN, AT ALL BENDS,
deep shall be made along the length of the basin excavation. Excavate trenches every 6 ft (measured from
AND B. CONIC. Wt. =
OF THE SYSTEM FOR MATE TO OF FILPOSES. THE TOP A THE HT,CLEVANDAL
SHOULO EXTEND 6 INCHES ABOVE THE TOP OF FILTER AND HAVE A WATERTIGHT, VANDAL CONIC. Wt. =
SHOULD
Vo CY- center to center of each trench sand fill with 1 2 in. of clean course sand and 11-1
Nc.:,.. RNr+ Va..: annex Conc. Unit WL _ (73.26 + 36) x 150 LB/CF = 16.389 LBS. ) / /2 in of ASTM No. 67
- :PROOF CAP. AT LEAST ONE CLEANOUT. SHALL BE INSTALLED AS AN EMERGENCY DRAIN THAT Earth Wt.- on
!Ring = Va x Earth Unit Wt. = (36 - 25)- x. 5.04. x 115.11 = 5,216.4 LBS. -- - - aggregate.
IS FLUSH WITH THE TOP OF FILTER AND HAVE A 6-INCH THREADED EXTENSION PIPE. THE Anti-Floatatian
=: 16,389 + 5,216.4 = 21.605.4 LBS. (safety factor =. 1.4) - - - -
FURTHEST CLEANOUT FROM: THE OUTLET MUST HAVE THE MINIMUM REQUIRED FILTER DEPTH. -
- - - - Ripped or trenched (uncompacted) soil subgrade can settle after basin installation and compaction. Therefore,
base compaction requires special attention to means and methods in the specifications and during construction
inspection to minimize future settlement from ripped or trenched soil subgrades.
3" layer of
: washed
non-dayNonWoven
sod: - - - -
.
pea gravel or�(x1`r��`',re''rA .Filter Fabric - - -
washed stone � '�'��a�� � ���'cwt SEE T
fr
�5r
V-6" Sand Bed Non -Woven-
(ASTM C-33 Medium �.b.'� _ Filter Fabric-
r3
aggregate concrete ,,, � "� .�yta '_��.�'"�"�� TOP OF OUTLET
sand) INV.=ie6349-
...Non -Woven
Filter Fabric -
12" min. impermeable Liner TRASH RACK DETAIL - - 4'PRIMARYWEIR
- -
where necessary INV. = 652.00
DETAIL A P rforated 6" min. PVC pipe
SURFACE SAND :FILTER (lateral spaces at 10' G.C.) -
STRUCTURE OUTSIDE
GENERAL BNP MAINTENANCE TASKS FRAME. CENTERsaec r>�,+�•I
1. Emergency Maintenance shall be performed Immediately after floods and ther emergencies.. Replanting and repairs to Structures may be necessary. �.� Q, A......APO 4•
Obstructions and debris deposited should be removed Immediately. - • .� �d �S •. �. p.
2. Regularly removedebris and litter. -
3. Monitor BMP for sediment removal. Proper disposal of the sediment removed. is required. - - : - r- SEAL
2
4. Maintain a healthy. ground cover in and around the BMP to promote staiiilityand erosion control. • • �T1A
b. Routinely inspect, exercise and: provide preventative maintenance on all riechanical components. - - �'�' ,SURv�;•(p3'�`�,e
ttar
• o
6. Vegetation Maintenance shall include.inspection -for: distressed vegetation, bare spots, and rills.Treatment oulsoE W5u>EFRAME �� ,,•eyy„'y.U�,.
of these areas and revegetatlon shall be immediate to prevent spreadin : _ Y - 4 �" T „,jl_
7. Maintain a permanent pool of water: to promote a healthy aquatic environment. I 11 UP OF � (�
8. Inspect and treat permanent pool for mosquitoes and other insects. a/" xatrs ANGIOR a' TOP. of PERWNENr pool $ f
9. Immediately after the wet detention basin is established. The plants on - he vegetated shelf and perimeter of the basin should. be watered twice weekly if •I BOOM OF -
needed, until the plants become established (commonly six weeks). - FORE13Ay
CLASS
RIP RAP
10. No portion of the wet detention pond should be fertilized after the firs Initialfertilizationthat is required to establish the plants on the An VORTEX Ilr i t p eq P vegetated -shelf. ANTI voRiEx piAlE ON a" oa. -
11. Stable groundcover should be maintained in the drainage area to reduc the sediment load. to the wet detention :basin. FOREBAY BERM SECTION
12. If the basin - must be .drained for an emergency or to perform. mainten ce, the flushing of sediment through the emergency drain should be minimized to f
the maximum extent practical. - - ,
f/4e3" F7J,T
13. Once year, a Professional Engineer should inspect the embankments j _I
14. Dewatering Pump: Piranha P200- 2 HP, 180gpm or equal -
GALVANIZED STEEL' GRATE 149�06
-,
GRAPHIC SCALE
( IN FEET )
I inch = 20 ft.
THIS PLAN IS A FINAL DRA TANG -NOT
RELEASED FOR CONSTRUCTION
UNLESS INIT IDATTD,A APPROVED:
APPROVED:
AL /_jvUl—
'IYAlE
2
m/06i
REVtSM PER CLIENT REQUESTS
YVM
1
08/27/16
REVISED PER COMMENTS
YVM
ND,
DATE'-
REVISIDN - -
BY
SHEET TITLE
SAND FILTER
AS —BUILT DETAIL SHEET
PR Nor
SCALE
20'
rT
7/24/15
PROJECT
COTTON FLATS
TOWN OF WAXHAW, UNION COUNTY, N.C.
FOR: WAXHAW MILL VENTURES, LTC
Will
BTG
CFD BY
MAH
_ -
YAasaoum WILT. it at gI0U1LBy )(Nil
Plaxxixg a Surveying a Exgixesill
730 1iDdeor 0 Court ,(E6279) P.O.7007 (28M)
- 701.666.1690 704.666.0606(faz) -
nRAvuts Na
249-36
S,T 11BF 19 r
1
4