SW6130201_Grading/Drainage Plan_20130222

�/1`��
245-
•(G� EXISTING DROP INLET
PROPOSED
�y
OORAISE GRATE ELEVATION TO MATCH
y- - - / /I / SEE SHEET C5.2 FOR DETAILS \ i \ \ \ r ' , & PROPOSED GRADE
/ 7 j + O �'�gJ�� NEW RIM ELEVATION: 246.21
�h I oil �\ \\ ���^�aQ`yc\ coNVERT ro MANHOLE
UjS UT:� 20
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co-2 OF 1p"PVC \ ��� ° \ °
28 TOP:245.00 @ 0, ♦ tieP \ REMOVE EXISTING 18 RCP &INSTALL
�001
\60 LFOF NEW 18" RCR�INSTALL INLET PROTECT RIP RAP AT FES 4
/i4 1\M-13 \ 1 1 �ryb \ \ \ \ (SEE DETAIL SHEET C8.2)
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ios
map 1I1 ,L ` IF V
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\ / a aA'' / I \ \\ yJtiOa�p�
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INV \
71
// / ✓//////�,�� 1\ ij `) \ I a \\ + \\ -i- 2WOF10'PVC 0.50% \ \ \ -�? _\ \ FES
\\ \
/i //// // / � 252.51 252.9E \ \\ \\ B ? \ �T9 NV • 41 1 'R
GRATE /' uc$ \ \+� \ A� \
\ \
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1 \ \ \ 253.74 \ f�... Ao +, 1 -td--_-ss--\ \ .,:. \\`\ \ \ i
%I
O
y
ROOF RAIN
\
\ Ipy \ CONNECT ROOF DRAINS TO
LINE CO2T000-1N FENCING
5, 260 MAINTAIN CONSTRUCTION FENCING AROUND 3
+�Z --- ,
'� \ ON -SITE WASTEWATER AREA NO GRADING OR
\ HEAVY EQUIPMENT ON THIS AREA. \ \
254.20
L`6 t 1 1 / � G{Q�1� \ �9 \ \ \ a • \
IN 4
I N,
APPROXIMATELY 2" FROM EXISTING EDGE /
ti \ \
OF PAVEMENT TO ENSURE CLEAN JOINT •258- - ti + \\\\N O
o�+ \-
;� e1 cv
LU
MAINTAIN CONSTRUCTION FENCING AROUND + \ `� / /�\/+ STORM DRAINAGE CHART
ONSITE WASTEWATER AREA. NO GRADING OR HEAVY EQUIPMENT ON THIS AREPROJECT: N. PARKER CHURCH - FDS
A + \ l �/ / _ P/ \ DATE: 1/30/2012
LOCATION: N. PARKER CHURCH ROAD, HOKE COUNTY, NC REVISED:
STORM FREQUENCY (ON -SITE): 10 YR. - C=SEE CHART 1=7.97 (10 yr.) PER NOAA JOB NO: 487-M
I ALL PIPE SHALL BE CL III RCP UNLESS NOTED OTHERWISE. COMPUTED BY: LJB CHECKED BY: CTB
LINE DRAINAGE AREA (ACRES) Q(CFS) PIPE DATA INVERT ELEVATIONS VELOC. INLET/RIM ELEVATION
1 FROM TOOFFSITENSIT O MrvALUE
REMARKS
1 + +� 9 A / � •p, y� ^ { \ TOTAL F�� C VAL. t0 yr. I9YR 1aoYR PE PERCENT LENGTH UPSTREAM DOWNSTREAM FPS (FULL) FT.
+/� e���J1.1s'' �O`P' \ C0-2 CO-1 - 0.20 0.20 - 095 1.59 1.59 N/A 1.66 0.012 '0.50 108 10 246.26 245.72 CO-2 = 253.80 PVC
CO-1 `'
FES 1
-
--
-
--
-
-
-
WA
1.66
0.012
0.50
123
10
245.62
245.00
CO-1 = 253.80
PVC
RIP -RAP CHART
CB 2
FES 3
0.05
0.45
0.50
-
0.80
3.19
3.19
N/A
5.04
0.012
0.50
25
15
246.12
246.00
CB 2 = 251.44
CL-111 RCP
TRUCTURE
NO.
O-FLOW
(CFS)
DUI.OF
PIPE
(IN.)
OUTLET
VEL
(FPS)
d50
(IN)
(L)
APRON
FT)
(W)
APRON
(
APRON
THICK
ON)
TON
CLASS
CB 1
FES 2
-
.021
.021
-
0.95
1.59
7.59
N/A
1.66
0.012
0.50
29
10
244.07
243.93
CB 4 = 246.57
PVC
RS 1
FES 5
-
-
-
-
-
-
-
-
-
0.012
0.50
21
8
243.60
243.50
RS 1 = 245.00
PVC
FES-1
1.70
10
3.37
3
10
13
9
A
DI I
EX. DI
-
-
-
-
-
-
-
-
-
0.012
0.50
59
12
241.79
241.50
D1 1 = 245.20
PVC
FES-2
1.70
10
3.73
3
10 • ,
13
9
A
FES-3
5.04
15
3.19
4
16 `.
20
9
A -
;: FES 4
EX. DI
2.00
0.15
2.15
-
0.30
5.14
5.14
N/A
8.04
0.012
0.50
60
18
241.80
241.50
-
CL-III RCP
FES-5
0.90
8
1 2.70
121
8,
10
9
A
,
NOTE: ZH oZ=WW
W
CONTRACTOR TO SAVE SUFFICIENT TOPSOIL ON SITE TO BE = O ¢ w w CO F- M
RE -SPREAD AFTER GRADING IS COMPLETE. HAUL OFF ANY N I.-
VO m p t O OP- w
EXCESS TOP SOIL. C7 m y O_ zcc cr a v_) z
LEGEND �°cDZoao<
QF..Z W Zp n
�LL¢�Umwow
EXIST. CONTOUR '- -' Q W W p: O W w W
wawzo >>z
EXIST. SPOT ELEV. sts.a a a a O m a j
PROP. CONTOUR r`3pp�/ W Ir
PROP. SPOT ELEV. (BOTTOM OF CURB OR GROUND) 0/-302.14
PROP. SPOT ELEV. (TOP OF CURB) 0/-302.14" =) J W
O > H N
PROP. JUNCTION BOX z y U
PROP. CATCH BASIN Z c
PROP. FES v m m g r_Q.
Of
PROP. DRAINAGE SWALE
� a
PROP. DIVERSION DITCH DW } m =
m LLJ 0 V
PROP. SILT FENCE sr' LU M
PROP. INLET PROTECTION !` O
PROP. LIMITS OF CONSTRUCTION LOC UJ
W
PROP. TREE PROTECTION FENCING ----7T
PROP. COIR MESH BAFFLES IN SED. TRAP
PROPOSED BMP EASEMENT Z a
GENERAL GRADING NOTES a H
1. LAND DEVELOPMENT/EROSION CONTROL INSPECTOR TO BE GIVEN 24 HOURS NOTICE Z W Q- W ¢ -6
PRIOR TO START OF CONSTRUCTION. O Z U z z r Is n
-2. THE CONTRACTOR SHALL MAINTAIN EACH STREAM, CREEK OR BACKWASH CHANNEL IN I­_�r O (9 6918
AN UNOBSTRUCTED STATE AND SHALL REMOVE FROM THE CHANNEL AND BANKS OF THE a: (D cf) W p, c I✓ m
STREAM ALL DEBRIS, LOGS, TIMBER, JUNK AND OTHER ACCUMULATIONS.
DZu)5; -7
3. PE SEALED SHOP DRAWINGS FOR RETAINING WALLS) MUST BE SUBMITTED TO CITY m W Q (j 5 r'n ,.•
ENGINEER PRIOR TO CONSTRUCTION.
4. APPROVAL OF THIS SITE PLAN IS NOT AN AUTHORIZATION TO GRADE ADJACENT -LL u.
PROPERTIES. WHEN FIELD CONDITIONS WARRANT OFF -SITE GRADING, PERMISSION MUST
BE OBTAINED FROM THE AFFECTED PROPERTY OWNERS. - - I g
5. NON-STANDARD ITEMS Q.e.: PAVERS, IRRIGATION SYSTEMS, ETC.) IN THE RIGHT-OF-WAY LL C
REQUIRE A RIGHT-OF-WAY ENCROACHMENT AGREEMENT WITH THE NCDOT BEFORE
INSTALLATION. -
Uf
& LANDINGS OUTSIDE ALL DOORS SHALL BE SIZED PER THE NORTH CAROLINA BUILDING
CODE (NCBC), BE AT THE SAME ELEVATION AS THE FINISHED FLOOR ELEVATION AND Seal
HAVE A MAXIMUM 2% SLOPE IN ANY DIRECTION INCLUDING DIAGONAL
GAIT ••.
7. THE SLOPES IN THE HANDICAP PARKING SPACES / ACCESS AISLE AREAS SHALL NOT - Q��•.••'»•'••O� / ��i
EXCEED 2% IN ANY DIRECTION INCLUDING IN THE DIAGONAL 2�OF ESS /0,1
1•.•,1
7�,
8. THERE SHALL BE LEVEL TURNING AREAS (MAX. 2% SLOPE IN ANY DIRECTION INCLUDING �¢ SEAL �
IN THE DIAGONAL) ON ALL SIDEWALKS WHERE AN INTERSECTING SIDEWALK CONNECTS. i 12557
WITH IT.
9. THERE SHALL BE NO DESIGNATED PEDESTRIAN ROUTES / SIDEWALKS WITHIN THE SITE, •i��T ••••'•• �� O J
DIRECTIEXCEPTON TRAVEL AND A 2LABELED AS A%CR08WITH
SLOPE. RAILS.
WHICH EXCEED A 5% SLOPE IN THE
2
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-Engineer
PERMENANT SWALE
UB
Drawn By
CROSS-SECTION
1/30/13
LINE WITH NORTH AMERICAN GREEN CHANNEL STABILIZATION FABRIC (SEE DETAIL SHEET
Dale
C8.2.
Revisions
DRAWING INFORMATION
2-2WSREINIM PER NCDEM SNMC°NENB
TRUE PLAN
NORTH ,�_ 1 NORTH
North Carolina Ow -WI Cum
Call 8ff Bofoly You Dig
GRAPHIC SCALE
( INIr)
1 inch - 20 R
487.038
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ENLARGED DETAIL BERMUDAGRASS SOD
SCALE: 1"= 10' _C.�c��
RS-1 15" CMP RISER 10-1.0 HOLES 04-1/4^ OIC
SOD ON SLOPES TO SAND FILTER TOP ELEV = 246.00 TOP ELEV = 245.00 4 Rows 3 1/3" ac
INV = 243.60
- RIP RAP AROUND RISER _
CLEANOUT FES-5
U (TYPICAL AT ALL BENDS, DI-1
1T' ABOVE GROUND) INV = 243.50 6 RIM = 245.00
6'
24 -- — — — ——— VEWAY 247
246 -- — --
SAND FILTER — — — — � � — — 246
1 --—h��A�( __ 3
�� 245 1' STORM STAGE • L4' STORAGE — — 245 -
3 WO PONDING ELEV=244.36 ' -
244 - 12" CMP BARREL � 0.50% -- — 244
s 18" �:v r:�:,.1a:;a:w.. N 'k. .. ;SMr1.�•n?: .."..ar;'Oy :.a, ':.�.� t""Wr"'
243 Alg§f=W. b1VSAiS-�ij�'''%t�>?�=>`<:+n•'.=,;�lr,ytii.�'.hvVr�-e•.'s'a=.•
ASTM C33 t'''r...y '.s1 ! ;lyh_,� R�r:;.4{I" yicn ,�:4'.:. i�ti (Ie.; ""ss.'.4,.•i„4+.{?Fi.T .t.�.
242 — —--242
FILTER FABRIC SLOPE TYPICAL SECTION WARD ND RISER
NE
SAND FILTER W/ FOREBAY S.H.W.T.=230.30+/-.
FILTER FABRIC
AROUND UNDERDRAIN
GRAVELBED SAND FILTER SECTION s o I Lo oN BLOCK
(1T DEEP)
'B-B' PERFORATED 4" DIA.
(NOT TO SCALE) UNDERDRAIN PIPE (SCHEDULE
40 PVC OR SLOTTED HDPE)
8" MIN UNDERDRAIN Y8" PERFORATIONS @ 6" O/C
GRAVEL BED (#57 MIN. OF 4 HOLESIROW
WASHED STONE)
SEDIMENT BASIN CONVERSION NOTES: coO I. -
ALL KEAS ABOVE THFE PERMANENT POOL SHALL
3EEDEDTO PERMANENT W Z ❑ Z= W W
GROUND COVER SPECFICATIONS. = O Q W W 0]
H rr U W 00 000
THE PERMANENT DRY POND SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING DRAINAGE O - F- W
IS STABILIZED. ANY SEDIMENT THAT ACCUMULATES WITHIN THE POND SHALL BE REMOVED AND M N � U I-: Z t_n rr
THE FINAL GRADE REESTABLISHED TO THE PROPOSED CONTOURS SHOWN. �' LL N 2 a -Q Z
THE PROPOSED STORMWATER MANAGEMENT PONDS ARE TO BE CONVERTED FROM SEDIMENT O C4 Z ❑p a p Z a
AND EROSION CONTROL BASINS. THIS CONVERSION SHOULD BE COMPLETED AFTER THE ENTIRE Q H Z W Z ❑ Q.
DRAIN AREA IS STABILIZED AND APPROVAL GIVEN FOR THE LOCAL & STATE AUTHORITY. D: - �fj) U Waww(~j ❑
IJJ
THE CONVERSION TO A PERMANENT STORMWATER BMP SHALL BE ACCOMPLISHED BY INSTALLING TA IL W Z ❑ O � � Z
THE PERM. OUTLET STRUCTURE AND REGRADING THE BASIN CONTOURS TO THOSE SHOWN ON y O Z Q O W W O 0=
THE PLAN. H (L 5D. p mcc n
.(L F
_Z Lu3p I ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF W
PUMPS AND DISCHARGES THROUGH A'BLADDER' TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN cc cc
APPROVED SYSTEM.
ALL SEDIMENT REMOVED SHALL BE PLACED IN A DESIGNATED SPOIL PILE AND ADEQUATELY in- mr,rn
PROTECTED WITH EROSION CONTROL MEASURES AND PERMANENTLY STABILIZED WITH ¢ CO 1
PERMANENT SEEDING. > D N Lp
C� CD z �v
o QZ_0
- Q m O�O.
SAND FILTER DESIGN SUMMARY m p a
�-J
DRAINAGE AREA: 1.14 AC TOTAL Q
W.Q. PONDING: 1.5' MAX m L-J U
❑ _ 1
SAND DEPTH: 1.5' (L �— M
O
TIME TO DRAIN: 40 HOURS
WATER QUALITY VOL. 2,055 CF W
❑
SEDIMENT CHAMBER: 215 SF (ELEV 243.60)
SAND FILTER MEDIA 650 SF (ELEV 243.50) 0
z
N
RIP -RAP CHART CC~ Z
zWQcr¢
DIA. OF OUTLET W (W) APRON L� I W W
STRUCTURE Q-FLOW PIPE VEL. d50 APRON APRON THICK STONE O Z V Z z tLn
NO. (CFS) (IN.) (FPS) (IN) LEN. WID. (IN.) CLASS I"' O z g c C 9
(FT.) (FT.) ir0 CA W IL
g oc
FES-1 1.70 10 3.37 3 10 13 9 A Z LL
FES-2 1.70 10 3.73 3 10 13 9 A mwa 0sW C E
FES-3 5.04 15 3.18 4 16 20 9 A ¢ U.
FES-5 0.90 8 2.70 1 2 1 8-j 10-1 8 A
LLC
NOTE: sear
ALL SLOPES DRAINING TO SAND FILTER AREAS SHALL BE rF ESS pti �y'p
STABILIZED PER THE NORTH CAROLINA STATE EROSION CONTROL
SEDIMENT CONTROL PLANNING & DESIGN MANUAL BEFORE MEDIA t4 SEAL
IS PLACED. 12557
DRAINAGE AREA MUST BE STABILIZED BEFORE FILTRATION ��0 �0( :• •'�R��.' o1�j
CONTROLS & FILTER MEDIA ARE INSTALLED. ANY SILT THAT ENTERS �•.,�aV '•„��'•`�� Z
THE FACILITY SHALL BE REMOVED BY THE CONTRACTOR AND
DISPOSED OF OFFSITE.
SAND FILTER OPERATION & MAINTENANCE PLAN t2 `��13ozo1 z%Zz%3 L L
z iy 13 ' Z
SAND FILTER MAINTENANCE 18 THE RESPONSIBILITY OF AMERICAN ASSET CORP. ANDIOR ITS DESIGNATED PROPERTY i 0 -J Z
MANAGEMENTASSOCIATION. d..
IMPORTANT MAINTENANCE PROCEDURES: (.)0 Q Q
Q z J
THE DRAINAGE AREA WILL BE CAREFULLY MANAGED TO REDUCE SEDIMENT LOAD TO THE SAND FILTER. V
TH
E SEDIMENTATION CHAMBER OR FOREBAY WILL BE CLEANED OUT WHENEVER SEDIMENT DEPTH EXCEEDS SIX -
ONCE A YEAR, SAND MEDIA WILL BE SKIMMED. -
THE SAND FILTER MEDIA WILL BE REPLACED WHENEVER IT FAILS TO FUNCTION PROPERLY AFTER MAINTENANCE. V Z z v
THE SAND FILTER WILL BE INSPECTED QUARTERLY AND WITHIN 24 HOURS AFTER EVERY STORM EVENT GREATER THAN - Q
1.0INCHES. RECORDS OF OPERATION AND MAINTENANCE W21LL BE KEPT IN A KNOWN SET LOCATION AND WILL BE � LU Z z
AVAILABLE UPON REQUEST. CC Y cr =
INSPECTION ACTIVITIES SHALL BE PERFORMED AS FOLLOWS: ANY PROBLEMS THAT ARE FOUND SHALL BE REPAIRED L u a (.5 LfLfLflliiY��...'
IMMEDIATLEY.
BMP ELEMENT: POTENTIAL PROBLEM: HOW 1 WILL REMEDIATE THE PROBLEM:
ENTIRE BMP TRASH DEBRIS PRESENT REMOVE THE TRASH/DEBRIS
ADJACENT PAVEMENT SEDIMENT IS PRESENT ON THE REGRADE THE SOIL IF NECESSARY TO
OF APPLICABLE) PAVEMENT SURFACE REMOVE THE GULLY, AND THEN PLANT A
- GROUND COVER AND WATER UNTIL IT 18
ESTABLISHED. PROVIDE LIME AND A
ONETIME FERTILIZER APPLICATION.
VEGETATION IS TOO SHORT OR TOO MAINTAIN VEGETATION AT AN
LONG. APPROPRIATE HEIGHT.
FLOW DIVERSION STRUCTURE THE STRUCTURE IS CLOGGED. UNCLOG THE CONVEYANCE AND
DISPOSE OF ANY SEDIMENT OFFSITE
THE STRUCTURE IS DAMAGED. MAKE ANY NECESSARY REPAIRS OR
REPLACE IF DAMAGE IS TOO LARGE FOR
- REPAIR.
FORESAY OR PRETREATMENT SEDIMENT HAS ACCUMULATED TO A SEARCH FOR THE SOURCE OF THE
AREA DEPTH OF GREATER THAN SIX SEDIMENT AND REMEDY THE PROBLEM IF
INCHES. 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 OCCURRED. 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 PLANTS RATHER THAN SPRAYING.
FILTER BED AND UNDERDRAIN WATER IS PONDING ON THE SURFACE CHECK TO SEE IF THE COLLECTOR
COLLECTION SYSTEM FOR MORE THAN 24 HOURS AFTER A SYSTEM IS CLOGGED AND FLUSH IF
STORM. NECESSARY. IF WATER STILL PONDS,
REMOVE THE TOP FEW INCHES OF
FILTER BED MEDIA AND REPLACE IF
WATER STILL PONDS, THEN CONSULT AN
EXPERT.
OUTLET DEVICE CLOGGING HAS OCCURRED. CLEAN OUT THE OUTLET DEVICE.
DISPOSE OF THE SEDIMENT OFFSITE.
THE OUTLET DEVICE IS DAMAGED. REPAIR OR REPLACE THE OUTLET
- DEVICE
RECEIVING WATER EROSION OF OTHER SIGNS OF - - CONTACT THE NC DIVISION OF WATER
DAMAGE HAVE OCCURRED AT THE QUALITY 401 OVERSIGHT UNIT AT
OUTLET. 919.733-1786.
�zY La
z
•�i w
d 63 1=
CTB
Engineer
WB
Drawn By
1/30/13
Date
487-038
C502
Sheet 6 of 14
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252.98
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•
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ado Ago
C u �MMM
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��• MMM��►• FLOW
<- DEVICE
.n
I Up
` � IIR •
;! A
:Ker- .1• ln'
i
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SAND FILTER ,/
ENLARGED DETAIL BERMUDAGRASS SOD
SCALE: 1"= 10' _C.�c��
RS-1 15" CMP RISER 10-1.0 HOLES 04-1/4^ OIC
SOD ON SLOPES TO SAND FILTER TOP ELEV = 246.00 TOP ELEV = 245.00 4 Rows 3 1/3" ac
INV = 243.60
- RIP RAP AROUND RISER _
CLEANOUT FES-5
U (TYPICAL AT ALL BENDS, DI-1
1T' ABOVE GROUND) INV = 243.50 6 RIM = 245.00
6'
24 -- — — — ——— VEWAY 247
246 -- — --
SAND FILTER — — — — � � — — 246
1 --—h��A�( __ 3
�� 245 1' STORM STAGE • L4' STORAGE — — 245 -
3 WO PONDING ELEV=244.36 ' -
244 - 12" CMP BARREL � 0.50% -- — 244
s 18" �:v r:�:,.1a:;a:w.. N 'k. .. ;SMr1.�•n?: .."..ar;'Oy :.a, ':.�.� t""Wr"'
243 Alg§f=W. b1VSAiS-�ij�'''%t�>?�=>`<:+n•'.=,;�lr,ytii.�'.hvVr�-e•.'s'a=.•
ASTM C33 t'''r...y '.s1 ! ;lyh_,� R�r:;.4{I" yicn ,�:4'.:. i�ti (Ie.; ""ss.'.4,.•i„4+.{?Fi.T .t.�.
242 — —--242
FILTER FABRIC SLOPE TYPICAL SECTION WARD ND RISER
NE
SAND FILTER W/ FOREBAY S.H.W.T.=230.30+/-.
FILTER FABRIC
AROUND UNDERDRAIN
GRAVELBED SAND FILTER SECTION s o I Lo oN BLOCK
(1T DEEP)
'B-B' PERFORATED 4" DIA.
(NOT TO SCALE) UNDERDRAIN PIPE (SCHEDULE
40 PVC OR SLOTTED HDPE)
8" MIN UNDERDRAIN Y8" PERFORATIONS @ 6" O/C
GRAVEL BED (#57 MIN. OF 4 HOLESIROW
WASHED STONE)
SEDIMENT BASIN CONVERSION NOTES: coO I. -
ALL KEAS ABOVE THFE PERMANENT POOL SHALL
3EEDEDTO PERMANENT W Z ❑ Z= W W
GROUND COVER SPECFICATIONS. = O Q W W 0]
H rr U W 00 000
THE PERMANENT DRY POND SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING DRAINAGE O - F- W
IS STABILIZED. ANY SEDIMENT THAT ACCUMULATES WITHIN THE POND SHALL BE REMOVED AND M N � U I-: Z t_n rr
THE FINAL GRADE REESTABLISHED TO THE PROPOSED CONTOURS SHOWN. �' LL N 2 a -Q Z
THE PROPOSED STORMWATER MANAGEMENT PONDS ARE TO BE CONVERTED FROM SEDIMENT O C4 Z ❑p a p Z a
AND EROSION CONTROL BASINS. THIS CONVERSION SHOULD BE COMPLETED AFTER THE ENTIRE Q H Z W Z ❑ Q.
DRAIN AREA IS STABILIZED AND APPROVAL GIVEN FOR THE LOCAL & STATE AUTHORITY. D: - �fj) U Waww(~j ❑
IJJ
THE CONVERSION TO A PERMANENT STORMWATER BMP SHALL BE ACCOMPLISHED BY INSTALLING TA IL W Z ❑ O � � Z
THE PERM. OUTLET STRUCTURE AND REGRADING THE BASIN CONTOURS TO THOSE SHOWN ON y O Z Q O W W O 0=
THE PLAN. H (L 5D. p mcc n
.(L F
_Z Lu3p I ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF W
PUMPS AND DISCHARGES THROUGH A'BLADDER' TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN cc cc
APPROVED SYSTEM.
ALL SEDIMENT REMOVED SHALL BE PLACED IN A DESIGNATED SPOIL PILE AND ADEQUATELY in- mr,rn
PROTECTED WITH EROSION CONTROL MEASURES AND PERMANENTLY STABILIZED WITH ¢ CO 1
PERMANENT SEEDING. > D N Lp
C� CD z �v
o QZ_0
- Q m O�O.
SAND FILTER DESIGN SUMMARY m p a
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DRAINAGE AREA: 1.14 AC TOTAL Q
W.Q. PONDING: 1.5' MAX m L-J U
❑ _ 1
SAND DEPTH: 1.5' (L �— M
O
TIME TO DRAIN: 40 HOURS
WATER QUALITY VOL. 2,055 CF W
❑
SEDIMENT CHAMBER: 215 SF (ELEV 243.60)
SAND FILTER MEDIA 650 SF (ELEV 243.50) 0
z
N
RIP -RAP CHART CC~ Z
zWQcr¢
DIA. OF OUTLET W (W) APRON L� I W W
STRUCTURE Q-FLOW PIPE VEL. d50 APRON APRON THICK STONE O Z V Z z tLn
NO. (CFS) (IN.) (FPS) (IN) LEN. WID. (IN.) CLASS I"' O z g c C 9
(FT.) (FT.) ir0 CA W IL
g oc
FES-1 1.70 10 3.37 3 10 13 9 A Z LL
FES-2 1.70 10 3.73 3 10 13 9 A mwa 0sW C E
FES-3 5.04 15 3.18 4 16 20 9 A ¢ U.
FES-5 0.90 8 2.70 1 2 1 8-j 10-1 8 A
LLC
NOTE: sear
ALL SLOPES DRAINING TO SAND FILTER AREAS SHALL BE rF ESS pti �y'p
STABILIZED PER THE NORTH CAROLINA STATE EROSION CONTROL
SEDIMENT CONTROL PLANNING & DESIGN MANUAL BEFORE MEDIA t4 SEAL
IS PLACED. 12557
DRAINAGE AREA MUST BE STABILIZED BEFORE FILTRATION ��0 �0( :• •'�R��.' o1�j
CONTROLS & FILTER MEDIA ARE INSTALLED. ANY SILT THAT ENTERS �•.,�aV '•„��'•`�� Z
THE FACILITY SHALL BE REMOVED BY THE CONTRACTOR AND
DISPOSED OF OFFSITE.
SAND FILTER OPERATION & MAINTENANCE PLAN t2 `��13ozo1 z%Zz%3 L L
z iy 13 ' Z
SAND FILTER MAINTENANCE 18 THE RESPONSIBILITY OF AMERICAN ASSET CORP. ANDIOR ITS DESIGNATED PROPERTY i 0 -J Z
MANAGEMENTASSOCIATION. d..
IMPORTANT MAINTENANCE PROCEDURES: (.)0 Q Q
Q z J
THE DRAINAGE AREA WILL BE CAREFULLY MANAGED TO REDUCE SEDIMENT LOAD TO THE SAND FILTER. V
TH
E SEDIMENTATION CHAMBER OR FOREBAY WILL BE CLEANED OUT WHENEVER SEDIMENT DEPTH EXCEEDS SIX -
ONCE A YEAR, SAND MEDIA WILL BE SKIMMED. -
THE SAND FILTER MEDIA WILL BE REPLACED WHENEVER IT FAILS TO FUNCTION PROPERLY AFTER MAINTENANCE. V Z z v
THE SAND FILTER WILL BE INSPECTED QUARTERLY AND WITHIN 24 HOURS AFTER EVERY STORM EVENT GREATER THAN - Q
1.0INCHES. RECORDS OF OPERATION AND MAINTENANCE W21LL BE KEPT IN A KNOWN SET LOCATION AND WILL BE � LU Z z
AVAILABLE UPON REQUEST. CC Y cr =
INSPECTION ACTIVITIES SHALL BE PERFORMED AS FOLLOWS: ANY PROBLEMS THAT ARE FOUND SHALL BE REPAIRED L u a (.5 LfLfLflliiY��...'
IMMEDIATLEY.
BMP ELEMENT: POTENTIAL PROBLEM: HOW 1 WILL REMEDIATE THE PROBLEM:
ENTIRE BMP TRASH DEBRIS PRESENT REMOVE THE TRASH/DEBRIS
ADJACENT PAVEMENT SEDIMENT IS PRESENT ON THE REGRADE THE SOIL IF NECESSARY TO
OF APPLICABLE) PAVEMENT SURFACE REMOVE THE GULLY, AND THEN PLANT A
- GROUND COVER AND WATER UNTIL IT 18
ESTABLISHED. PROVIDE LIME AND A
ONETIME FERTILIZER APPLICATION.
VEGETATION IS TOO SHORT OR TOO MAINTAIN VEGETATION AT AN
LONG. APPROPRIATE HEIGHT.
FLOW DIVERSION STRUCTURE THE STRUCTURE IS CLOGGED. UNCLOG THE CONVEYANCE AND
DISPOSE OF ANY SEDIMENT OFFSITE
THE STRUCTURE IS DAMAGED. MAKE ANY NECESSARY REPAIRS OR
REPLACE IF DAMAGE IS TOO LARGE FOR
- REPAIR.
FORESAY OR PRETREATMENT SEDIMENT HAS ACCUMULATED TO A SEARCH FOR THE SOURCE OF THE
AREA DEPTH OF GREATER THAN SIX SEDIMENT AND REMEDY THE PROBLEM IF
INCHES. 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 OCCURRED. 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 PLANTS RATHER THAN SPRAYING.
FILTER BED AND UNDERDRAIN WATER IS PONDING ON THE SURFACE CHECK TO SEE IF THE COLLECTOR
COLLECTION SYSTEM FOR MORE THAN 24 HOURS AFTER A SYSTEM IS CLOGGED AND FLUSH IF
STORM. NECESSARY. IF WATER STILL PONDS,
REMOVE THE TOP FEW INCHES OF
FILTER BED MEDIA AND REPLACE IF
WATER STILL PONDS, THEN CONSULT AN
EXPERT.
OUTLET DEVICE CLOGGING HAS OCCURRED. CLEAN OUT THE OUTLET DEVICE.
DISPOSE OF THE SEDIMENT OFFSITE.
THE OUTLET DEVICE IS DAMAGED. REPAIR OR REPLACE THE OUTLET
- DEVICE
RECEIVING WATER EROSION OF OTHER SIGNS OF - - CONTACT THE NC DIVISION OF WATER
DAMAGE HAVE OCCURRED AT THE QUALITY 401 OVERSIGHT UNIT AT
OUTLET. 919.733-1786.
�zY La
z
•�i w
d 63 1=
CTB
Engineer
WB
Drawn By
1/30/13
Date
487-038
C502
Sheet 6 of 14
SEDIMENT BASIN CONVERSION NOTES: coO I. -
ALL KEAS ABOVE THFE PERMANENT POOL SHALL
3EEDEDTO PERMANENT W Z ❑ Z= W W
GROUND COVER SPECFICATIONS. = O Q W W 0]
H rr U W 00 000
THE PERMANENT DRY POND SHALL NOT BE CONSTRUCTED UNTIL THE CONTRIBUTING DRAINAGE O - F- W
IS STABILIZED. ANY SEDIMENT THAT ACCUMULATES WITHIN THE POND SHALL BE REMOVED AND M N � U I-: Z t_n rr
THE FINAL GRADE REESTABLISHED TO THE PROPOSED CONTOURS SHOWN. �' LL N 2 a -Q Z
THE PROPOSED STORMWATER MANAGEMENT PONDS ARE TO BE CONVERTED FROM SEDIMENT O C4 Z ❑p a p Z a
AND EROSION CONTROL BASINS. THIS CONVERSION SHOULD BE COMPLETED AFTER THE ENTIRE Q H Z W Z ❑ Q.
DRAIN AREA IS STABILIZED AND APPROVAL GIVEN FOR THE LOCAL & STATE AUTHORITY. D: - �fj) U Waww(~j ❑
IJJ
THE CONVERSION TO A PERMANENT STORMWATER BMP SHALL BE ACCOMPLISHED BY INSTALLING TA IL W Z ❑ O � � Z
THE PERM. OUTLET STRUCTURE AND REGRADING THE BASIN CONTOURS TO THOSE SHOWN ON y O Z Q O W W O 0=
THE PLAN. H (L 5D. p mcc n
.(L F
_Z Lu3p I ANY SEDIMENT LADEN WATER WITHIN THE SEDIMENT BASIN SHALL BE DRAWN DOWN BY USE OF W
PUMPS AND DISCHARGES THROUGH A'BLADDER' TYPE SYSTEM OR DISPOSED OF OFFSITE IN AN cc cc
APPROVED SYSTEM.
ALL SEDIMENT REMOVED SHALL BE PLACED IN A DESIGNATED SPOIL PILE AND ADEQUATELY in- mr,rn
PROTECTED WITH EROSION CONTROL MEASURES AND PERMANENTLY STABILIZED WITH ¢ CO 1
PERMANENT SEEDING. > D N Lp
C� CD z �v
o QZ_0
- Q m O�O.
SAND FILTER DESIGN SUMMARY m p a
�-J
DRAINAGE AREA: 1.14 AC TOTAL Q
W.Q. PONDING: 1.5' MAX m L-J U
❑ _ 1
SAND DEPTH: 1.5' (L �— M
O
TIME TO DRAIN: 40 HOURS
WATER QUALITY VOL. 2,055 CF W
❑
SEDIMENT CHAMBER: 215 SF (ELEV 243.60)
SAND FILTER MEDIA 650 SF (ELEV 243.50) 0
z
N
RIP -RAP CHART CC~ Z
zWQcr¢
DIA. OF OUTLET W (W) APRON L� I W W
STRUCTURE Q-FLOW PIPE VEL. d50 APRON APRON THICK STONE O Z V Z z tLn
NO. (CFS) (IN.) (FPS) (IN) LEN. WID. (IN.) CLASS I"' O z g c C 9
(FT.) (FT.) ir0 CA W IL
g oc
FES-1 1.70 10 3.37 3 10 13 9 A Z LL
FES-2 1.70 10 3.73 3 10 13 9 A mwa 0sW C E
FES-3 5.04 15 3.18 4 16 20 9 A ¢ U.
FES-5 0.90 8 2.70 1 2 1 8-j 10-1 8 A
LLC
NOTE: sear
ALL SLOPES DRAINING TO SAND FILTER AREAS SHALL BE rF ESS pti �y'p
STABILIZED PER THE NORTH CAROLINA STATE EROSION CONTROL
SEDIMENT CONTROL PLANNING & DESIGN MANUAL BEFORE MEDIA t4 SEAL
IS PLACED. 12557
DRAINAGE AREA MUST BE STABILIZED BEFORE FILTRATION ��0 �0( :• •'�R��.' o1�j
CONTROLS & FILTER MEDIA ARE INSTALLED. ANY SILT THAT ENTERS �•.,�aV '•„��'•`�� Z
THE FACILITY SHALL BE REMOVED BY THE CONTRACTOR AND
DISPOSED OF OFFSITE.
SAND FILTER OPERATION & MAINTENANCE PLAN t2 `��13ozo1 z%Zz%3 L L
z iy 13 ' Z
SAND FILTER MAINTENANCE 18 THE RESPONSIBILITY OF AMERICAN ASSET CORP. ANDIOR ITS DESIGNATED PROPERTY i 0 -J Z
MANAGEMENTASSOCIATION. d..
IMPORTANT MAINTENANCE PROCEDURES: (.)0 Q Q
Q z J
THE DRAINAGE AREA WILL BE CAREFULLY MANAGED TO REDUCE SEDIMENT LOAD TO THE SAND FILTER. V
TH
E SEDIMENTATION CHAMBER OR FOREBAY WILL BE CLEANED OUT WHENEVER SEDIMENT DEPTH EXCEEDS SIX -
ONCE A YEAR, SAND MEDIA WILL BE SKIMMED. -
THE SAND FILTER MEDIA WILL BE REPLACED WHENEVER IT FAILS TO FUNCTION PROPERLY AFTER MAINTENANCE. V Z z v
THE SAND FILTER WILL BE INSPECTED QUARTERLY AND WITHIN 24 HOURS AFTER EVERY STORM EVENT GREATER THAN - Q
1.0INCHES. RECORDS OF OPERATION AND MAINTENANCE W21LL BE KEPT IN A KNOWN SET LOCATION AND WILL BE � LU Z z
AVAILABLE UPON REQUEST. CC Y cr =
INSPECTION ACTIVITIES SHALL BE PERFORMED AS FOLLOWS: ANY PROBLEMS THAT ARE FOUND SHALL BE REPAIRED L u a (.5 LfLfLflliiY��...'
IMMEDIATLEY.
BMP ELEMENT: POTENTIAL PROBLEM: HOW 1 WILL REMEDIATE THE PROBLEM:
ENTIRE BMP TRASH DEBRIS PRESENT REMOVE THE TRASH/DEBRIS
ADJACENT PAVEMENT SEDIMENT IS PRESENT ON THE REGRADE THE SOIL IF NECESSARY TO
OF APPLICABLE) PAVEMENT SURFACE REMOVE THE GULLY, AND THEN PLANT A
- GROUND COVER AND WATER UNTIL IT 18
ESTABLISHED. PROVIDE LIME AND A
ONETIME FERTILIZER APPLICATION.
VEGETATION IS TOO SHORT OR TOO MAINTAIN VEGETATION AT AN
LONG. APPROPRIATE HEIGHT.
FLOW DIVERSION STRUCTURE THE STRUCTURE IS CLOGGED. UNCLOG THE CONVEYANCE AND
DISPOSE OF ANY SEDIMENT OFFSITE
THE STRUCTURE IS DAMAGED. MAKE ANY NECESSARY REPAIRS OR
REPLACE IF DAMAGE IS TOO LARGE FOR
- REPAIR.
FORESAY OR PRETREATMENT SEDIMENT HAS ACCUMULATED TO A SEARCH FOR THE SOURCE OF THE
AREA DEPTH OF GREATER THAN SIX SEDIMENT AND REMEDY THE PROBLEM IF
INCHES. 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 OCCURRED. 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 PLANTS RATHER THAN SPRAYING.
FILTER BED AND UNDERDRAIN WATER IS PONDING ON THE SURFACE CHECK TO SEE IF THE COLLECTOR
COLLECTION SYSTEM FOR MORE THAN 24 HOURS AFTER A SYSTEM IS CLOGGED AND FLUSH IF
STORM. NECESSARY. IF WATER STILL PONDS,
REMOVE THE TOP FEW INCHES OF
FILTER BED MEDIA AND REPLACE IF
WATER STILL PONDS, THEN CONSULT AN
EXPERT.
OUTLET DEVICE CLOGGING HAS OCCURRED. CLEAN OUT THE OUTLET DEVICE.
DISPOSE OF THE SEDIMENT OFFSITE.
THE OUTLET DEVICE IS DAMAGED. REPAIR OR REPLACE THE OUTLET
- DEVICE
RECEIVING WATER EROSION OF OTHER SIGNS OF - - CONTACT THE NC DIVISION OF WATER
DAMAGE HAVE OCCURRED AT THE QUALITY 401 OVERSIGHT UNIT AT
OUTLET. 919.733-1786.
�zY La
z
•�i w
d 63 1=
CTB
Engineer
WB
Drawn By
1/30/13
Date
487-038
C502
Sheet 6 of 14
�zY La
z
•�i w
d 63 1=
CTB
Engineer
WB
Drawn By
1/30/13
Date
487-038
C502
Sheet 6 of 14

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Drawn By
1/14/13
Date
Revisions
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DA3