SW3230803_Plansheet - SCM Detail_20240620

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SCM 1 -Storage Volume Provided: S
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PROP. RIP-RAP APRON. // / o Sediment Overall Overall TURM
a WQ Sand WQ Sand WQ Chamber Incremental WATER
II I I a I Chamber Surface Total Notes
CLEAN-OUT END OF PIPES &ALL BENDS, / i ` 30 Chamber Area Chamber Storage Total Storage Storage Sendces
@ � 15 I / Elevation Area Area Storage
- SCM Inset Table
TYP. W/WATER-TIGHT VANDAL PROFF CAPS. i E _ (ft) (so (Co (Co (sf) (sf) (cf) (cf)
\ 70 LPE=616.28
C LPE=608.69 / 592.5 Bottom of r eorecommendation Sand Filter -SCM #1
EXTEND 6"ABOVE FINAL SURFACE. A I ` � 9
I I I I I 11lnL)I /I 594.0 Top of Stone/Bottom of Sand Project Name: McCoy Farm
600�' PROPOSED SAND MEDIA AREA= 8,050 SF. / / \ /i 595.0 To of Sand Filter/Bottom of Extended Dry Detention Pond Sequence ID: 1
J r E y \ \ I 595.0 8,050 0 0 --- 8,050 0 0 Pond Bot Draina a Area(acres): 25.9
596.0 10,800 9,425 9,425 21,500 34,500 21,275 21,275 Land Use/Development Type: >2 acres-Residential Open Space � - design
597.0 12,000 11,400 20,825 26,000 39,000 36,750 58,025 Vegetation T e: Grassed
597.3 12,800 3,720 24,545 27,500 40,100 11,865 69,890 Percent Built-Upon Area: 45%
PROP. WASHED STONE RIP-RAP \ 598.0 42,600 40,800 98,825 Sediment ChamberLength(ft.): 250 master planning . civil engineering
BERM, 2' WIDE @ TOP. . o _` �� 600.0 49,100 47,600 190,775 g p
Sediment Chamber Width ft. : 50 urban design . landscape architecture
� _„� �� � o Sediment Chamber Height ft. : 1.3
601.0 52,200 60,650 241,425
o I Sand Filter Type: Surface 919 berryhill rd.ste 101.charlotte,Inc 28208
/ PROPOSED SCM OUTLET AND PIPE; 18-29 I 14 1� �I 601.5 53,800 26,500 267,925 Pond Top Media Depth ft. : 1 704.332.1204 . www.dpr.design
REFER TO DETAILS THIS SHEET.
/ /I `�� V NC Firm License#C-0560
LPE 609.90 � 1 Media Surface Area ft2 : 8.050
10' PROPOSED CONCRETE SPILLWAY @ 600.50. ' \ \ Flow Diverter Present /N : N
IA-19 00 �/ / �Q� Q 5 �• a6 \ Static Water Quality Elevation @ 596.29 ft
Design Static Water Quality Elevation @ 597.00 ft Regulated By: Watershed Overlay
PROP. 6" @ 0.5% MIN. PERFORATED UNDERDRAIN PIPE, Static 1YR-24 Channel Protection Elevation @ 598.47 ft Treatment Effectiveness: Optimal
CLIENT/OWNER
-� ESHTW=589.00(594.00-5)IN THE SUMMIT GEOTECH REPORT DATED 2020-01-312. NC State Plane X eastin : 1497340
� � _ - - �, � ♦ " � TYP. PROVIDE 690 LF. TOTAL OF UNDERDRAIN, SCH-40 \ MILLS VENTURES, LLC.(R. DEAN HARREL)
/ / r J - - _ \ 4 ] \ / / Z/ PVC OR DOUBLE HDPE. ' NC State Plane Y(northing): 464902 5615 POTTER ROAD
/ / `sue r ♦ V ` O i V `L- rs MATHEWS, NORTH CAROLINA 28104
G/ � � � � 704.870.4614
SURVEYOR
' \ - 00
/ 3 \ / EAGLE ENGINEERING
ti �\ PROP. 10" SOLID UNDERDRAIN, / SCM OUTLET PIPE
:: .. I �d �� / SCM OUTLET STRUCTURES 2013AVAN BUREN AVE.
SCH-40 PVC OR DOUBLE HDPE. INDIAN TRAIL, NORTH CAROLINA 28079
\ 3 704.882.4222
/ �`1 �l ti8 / FROM INVERT INVERT TO PIPE
-: '' ''... ...•• •:.. . FROM NCDOT
\ �,\ 13 STRUCTURE TYPE STD# RIM DEPTH STRUCTURE UP DOWN STRUCTURE SIZE LENGTH SLOPE REMARKS WETLANDS
/ v - �I / ♦ o
LOWRYS ENVIRONMENTAL&ECOLOGICAL SERVICES
/ 1 0 f• / / \�j PE=611.49 I �O 0 1823 QUINN ROAD
.•.•/ i - - - - - - / � � _ _ I I G� 1 D-01 OCS 1 D-01 591.50 591.00 1 D-02 48 56 0.89/o RCP
CHESTER, SOUTH CAROLINA 29706
- PROP. RIP-RAP / a� 1 D-02 HW- 838.80
i r O Q APRON. GEOTECH
o e° SUM IIT ENGINEERINGTRE CIRCLE DRIVE
/ EX. POND /
/ 1.1 �:.. / FORT MILL, SOUTH CAROLINA 29715
704.504.1717
FEMA\ V A
�L / MAP#3710449600J, EFFECTIVE 10/16/2008
�•;•; KEY MAP
SCALE: =50'
0 25' 50' 100,
SCM #1 - SAND FILTER
PLAN 1"=50'
SAND FILTER AREA
10'MIN. GRASS STRIP CLEAN OUT W/WATER-TIGHT FILTER FABRIC W/#2 GRASS STRIP
W VANDAL PROOF CAP,TYP. STONE
TOP OF CAP TO BE 6"MIN. (FABRIC MUST MEET A
ABOVE SAND MEDIA,TYP. PERMEABILITY RATE OF
75 GAL./MIN./SQ.FT.)
N
O 1
3MAX
� 3 MAX. 3 MAX.
d7
GRADE ENTIRE BOTTOM OF SCM
(EXCLUDING SAND MEDIA)IN ALL . . . . . . . = GRADE ENTIRE BOTTOM OF
DIRECTIONS AT 1%MINIMUM. a SCM(EXCLUDING SAND Q�
1.0'SAND FILTER MEDIA Lu MEDIA)IN ALL DIRECTIONS AT SCM #1 - POND REPORT M C C OY FARM
SAND MEDIA IS TO BE FLAT,0%SLOPE. ASTM C 33 MEDIUM 1%MINIMUM. SAND MEDIA IS ��Q Q
I� . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ( . . . . . . . . . . . . . . . . . . . . . . . . z Culvert/Orifice Structures O Weir Structures 5
3
AGGREGATE CONC.-SAND) TO BE"BOTTOM"OF SCM. �� Q� GjQ
0 2024-03-27 [A] [B] [C] [PrfRsr] [A] [B] IC] [D]
U/ Rise(in) = 36.00 27.60 6.00 0.00 Crest Len(ft) = 14.00 10.00 0.00 0.00
z Span(in) = 36.00 18.00 168.00 0.00 Crest El.(ft) = 601.10 600.50 0.00 0.00
W No.Barrels = 1 4 1 0 WeirCoeff. = 3.33 2.60 2.60 3.33
Invert El.(ft) = 592.40 597.30 599.60 0.00 Weir Type = 1 Broad Broad --
W 6"PVC OUTLET PIPE @ 0.5%MIN � Length(ft) = 60.00 0.50 0.50 0.00 Multi-Stage = Yes No No No
C UNDERDRAIN PIPE @ 0.5%MIN.SLOPE. REFER TO DETAIL#3,THIS SHEET,FOR BOTTOM OF Slope(%) = 0.67 0.00 0.00 n/a
� (SCH 40 PVC OR DOUBLE WALL HDPE) SAND AND BOTTOM OF STONE ELEVATIONS. BOTTOM WESLEY CHAPEL ROAD
Q REFER TO EACH SCM'S PLAN VIEW FOR OF STONE AREA IS TO BE FLAT,0%SLOPE. N-Value = .013 .013 .013 n/a WESLEY CHAPEL, NORTH CAROLINA
J Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000(by Contour)
z UNDERDRAIN SPECIFICATIONS.
W Multi-Stage = n/a Yes Yes No TW Elev.(ft) = 0.00
PROJECT NUMBER
W SCM#2 ONLY:INSTALL AN IMPERMEABLE A 19076
1z°OF#s7 WASHED STONE. SCM#2 - POND REPORT O� �P
� SYNTHETIC LINER,PVC 30 MIL THICKNESS,
m OR EQUIVALENT. THE LINER IS TO ENCASENOTE:
NON-WOVEN FILTER FABRIC TOP AND BOTTOM OF DRAINAGE AREA MUST B E Culvert/Orifice Structures O � Weir Structures DATE
LO STONE(MIRAFI 180N OR EQUAL-MUST MEET A THE UNDERDRAIN AND SAND MEDIA. �V, c�Q\
I PERMEABILITY RATE OF 75 GAL./MIN./SQ.FT.) STABILIZED BEFORE FILTRATION CONTROLS 2024-03-27 [A] [B] [C] [PrfRsr] [A] [B] [C] [D]
N AND FILTER MEDIA ARE INSTALLED 05/07/2021
U Rise(in) = 30.00 2.50 12.00 0.00 Crest Len(ft) = 16.00 16.00 10.00 0.00
I Span(in) = 30.00 2.50 14.00 0.00 Crest El.(ft) = 615.50 614.50 615.00 0.00
t0 No.Barrels = 1 1 4 0 Weir Coeff. = 3.33 3.33 2.60 3.33 ISSUED FOR
oB-B SCM #1 & 2 - TYPICAL SAND FILTER CROSS SECTION B-B Invert El.(ft) = 609.20 613.00 613.50 0.00 Weir Type = 1 Rect Broad --- CONSTRUCTION DOCUMENTS
0� CROSS-SECTION NOT TO SCALE Length(ft) = 60.00 0.50 0.50 0.00 Multi-Stage =Yes Yes No No
Slope(%) = 0.83 0.00 0.00 n/a
N-Value = .013 .013 .013 n/a REVISIONS
0 Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000(by Wet area) NO. DATE DESCRIPTION BY
C) Multi-Stage = n/a Yes Yes No TW Elev.(ft) = 0.00
NO REVISION, ORIGINAL
�_ OUTLET CONTROL STRUCTURE RISER NOTES: 0 02/09/2022 SUBMISSION JF/JM/HN
(n REVISION PER 1ST CITY
Ld/ 1. ALL PRE-CAST SECTIONS TO BE ATTACHED AND REMAIN WATER TIGHT TO PREVENT 1 08/12/2022 COMMENTS JM/HN
FLOATATION.
TOP OF EMBANKMENT REVISION PER 2nd CITY
j 2. PRECAST RISER TOP SECTION WITH A MINIMUM 4 FT. HEIGHT AS A SINGLE PIECE.
SCM 1 -10'WIDE AT 601.50. 2 09/23/2022 COMMENTS JM/HN
SCM 2-10'WIDE @ 616.00. 3. PRECAST RISER BASE SECTION AS A SINGLE PIECE TO 12"MIN. OVER OUTFALL PIPE.
� 4. ALL CONCRETE TO BE 3000 PSI. REVISION PER NCDOT
W EMERGENCY SPILLWAY: 5. THE JOINT BETWEEN OUTLET PIPE&PRECAST RISER OPENING MUST BE 3 07/05/2023 COMMENTS JM/HN
W SCM 1-10'@ 600.50.
= WATERTIGHT AND FILLED WITH NON-SHRINK GROUT. REVISION PER NCDOT
U) SCM 2-10'@ 515.00.
/ REFER TO DETAIL#D5,SHEET SERIES C2. SCM 1 -6"RISE x 168"TOTAL SPAN WEIR @ 599.60. 4 12/15/23 AND E&SC COMMENTS JM/HN
p SCM 1 -6"RISE X 192"TOTAL SPAN WEIR @ 614.50.
Q SCM 1 &ROADWAY
C) SCM#2 ONLY:INSTALL AN IMPERMEABLE SCM 1 -NOTCH WEIRS,18"SPAN AT 597.30 ON(4)SIDES. 5 04/04/24 IMPROVEMENT REVISION JM/HN
SYNTHETIC LINER,PVC 30 MIL THICKNESS, SCM 2-NOTCH WEIRS,14"SPAN AT 613.50 ON(4)SIDES. REVISON PER NCDEQ
O OR EQUIVALENT. THE LINER IS TO ENCASE THE FIRST NOTCH WEIR IS TO BE POSITIONED ABOVE THE ORIFICE ON THE WATER SIDE OF THE STRUCTURE. ANY REMAINING NOTCH WEIRS,AS 6 06/19/24 REVIEW COMMENTS JM/HN
0 THE UNDERDRAIN AND SAND MEDIA. APPLICABLE,ARE TO BE POSITIONED ON THE REMAINING SIDES,PREFERABLY THE BACK SIDE OF THE STRUCTURE BEING LAST.
O
C) OUTLET CONTROL STRUCTURE
REFER TO DETAIL#D1 SHEET SERIES C2.
Q' ANCHOR BLOCK INFORMATION IS INCLUDED ON DETAIL#D3,SHEET SERIES C2.) SCM 1 SCM 2
0)
N 5%MAX. 0 100-YR STORM ELEV. @ 600.39 100-YR STORM ELEV. @ 614.93 5%MAX.
° GRATE ACCESS. REFER TO DETAIL#D1,SHEET SERIES C2. _
GEOTECH ENGINEER TO SUPPLY DESIGN 2/_MIN. 0 50-YR STORM ELEV. @ 599.83 50-YR STORM ELEV. @ 614.74 TOP OF SCM. 2%MIN.
I JUSTIFICATION FOR 3:1 SLOPE EMBANKMENT. - �-
O �/ 25-YR STORM ELEV. @ 599.33 25-YR STORM ELEV. @ 614.48
3 = PROJ. MANAGER: HN
O EARTH EMBANKMENT-CONSTRUCT WITH 0 10-YR STORM ELEV. @ 598.68 10-YR STORM ELEV. @ 614.07
�j LOW-PERMEABILITY SOIL FREE OF ROCKS, 1 2-YR STORM ELEV. @ 597.61 2-YR STORM ELEV. @ 613.55 RIP-RAP BERM:2'HIGH MIN.,TOP 2'WIDE MIN. DRAWN BY: JM
ROOTS,&ORGANIC MATERIAL AT 95%MIN. TRASH RACKS TO BE INSTALLED SO 0 SCM 1 @ 597.00. CHECKED BY: HN
O COMPACTION. FILL BERMS SHALL BE"KEYED" OPENING OF WEIRS ARE NOT IMPEDED. 0 1YR-24HR CP ELEV. @ 597.34 1YR-24HR CP ELEV. @ 613.21 SCM 2 @ 613.50.
IN AT CONSTRUCTION. EXACT FILL MATERIAL, (SEE DETAIL#D1,SHEET SERIES C2.) -_
COMPACTION RATE,MOISTURE CONTENT, 3 MAX 0 11N-6HR WQ ELEV. @ 597.00 11N-6HR WQ ELEV. @ 613.00 FOREBAY
t7 AND METHODOLOGY ARE TO BE = SEDIMENTATION 1 SEAL
Y RECOMMENDED,TESTED,AND CERTIFIED BY 1 SCM 1 -N/A. CHAMBER
A GEOTECHNICAL ENGINEER. (TYPICAL FOR SCM 2-2.5"0 ORIFICE INV.AT 613.00. CHAMBER Q 3 MAX
E ALL PONDS). ORIFICES TO BE ON WATER SIDE OF STRUCTURES. 6"LAYER#57 STONE. °
TOP OF SAND FILTER BED/BOTTOM OF BASIN MAINTAIN 1/o SLOPE MINIMUM. APPLIES TO
ORIFICE SHIELD(EXTEND FROM 12"MIN r? ALL DIRECTIONS. SAND MEDIA IS TO BE CAR
LL_ PRE-CON MEETING WITH CITY INSPECTOR& SCM 1 @ 595.00. ti' "BOTTOM"OF SCM. GRADE UP FROM SAND INLET a, A O
BELOW ORIFICE OPENING TO WEIR LEVEL) 0
GEOTECH ENGINEER IS REQUIRED PRIOR TO c� (SEE DETAIL#D1,SHEET SERIES C2.) SCM 2 @ 611.50. p p p MEDIA IN ALL DIRECTIONS AT 1%MIN. PIPE OQa,a��S.S. /O°aaaa/L
STARTING ANY EMBANKMENT WORK.
_ SEAL <
as
U FLARED END SECTION OR FOR COVER MATERIAL,SAND MEDIA,STONE,' _ I- 030523
HEADWALL W/RIP-RAP APRON. REFER AND UNDERDRAIN PIPE SPECIFICATIONS
� TO STRUCTURE AND PIPE CHARTS, REFER TO CROSS-SECTION B-B.
p THIS SHEET.FOR RIP-RAP
O REQUIREMENTS,SEE DETAIL#20.23,
SHEET C6 SERIES. FLOW NG \ o�
0
N
O O a
SCALE
U
O SHWTE:REFER TO STORAGE VOLUME CHART FOR EACH
AS INDICATED
Q) UNDERDRAIN INV: BOTTOM OF SAND/TOP OF SAND MEDIA: SCM'S SHWTE SPECIFICATIONS.
REFER TO STRUCTURE AND PIPE CHARTS,THIS SCM 1 @ 592.50. SCM 1 @ 594.00. DRAWING
W SHEET,FOR PIPE SIZE,LENGTH,AND INVERTS. SCM 2 @ 609.00.
0)
FILL BERM,IF APPLICABLE,"KEYED"IN. SHAPE,WIDTH,DEPTH,AND SCM2@610.50. ALL UNDERDRAIN PIPES @0.5%MIN. NOTE' REFER TO SHEET C2-7 FOR NOTES AND MAINTENANCE INFORMATION. SCM ENLARGEMENT PLAN
LOCATION SHALL BE SPECIFIED BY SUPERVISING GEOTECH ENGINEER. BOTTOM OF STONE: REFER TO EACH SCM'S PLAN VIEW FOR PIPE SIZES.
O
SCM 1 @ 592.40.
(� SCM 2 @ 608.90. UNDERDRAIN PIPE SIZES VARY.
/ ANTI-SEEP COLLARS,TYP. REFER TO DETAIL#D4,SHEET SERIES C2. PIPE MATERIALS MAY BE SCH-40 PVC OR DOUBLE WALL HDPE.
N WHEN PERFORATED UNDERDRAIN PIPES ARE SPECIFIED,USE 3/8"PERFORATIONS,4"CENTER-CENTER
SCM #1 & 2 - TYPICAL SAND FILTER CROSS SECTION A-A ALONG 4 ROWS SPACED @90°APART.
A-A
CROSS-SECTION NOT TO SCALE 0 C2 =5
ELI
COPYRIGHT©2020 DPR ASSOCIATES,INC.THE PLAN OR DRAWING AND ANY ACCOMPANYING DOCUMENTS OR CALCULATIONS ARE THE PROPERTY OF DPR ASSO IATES,INC.AND ARE INTENDED SOLEY FOR THE USE OF THE RECIPIENT NOTED.NO THIRD PARTY USE OR MODIFICATION IS PERMITTED WITHOUT WRITTEN AUTHORIZATION. ORIGINAL SHEET SIZE:24"X 36'.

SCM Storage Volume Provided: STORM
\ I I WQ Sand WQ Sediment Overall
'Aw / .J WQ Sand Chamber Overall Incremental WATER
3 01 Chamber Chamber Chamber Total Notes Sevi�es.-,_,-.
\ / Storage Surface Area Storage
\ ® O o Elevation Area Total Storage Area Storage SCM Inset Table
\ ft sf cf c sf sf cf cf
s Sand Filter - SCM #2
2B-02 \ \ / ° \ I _ — 609.0 Bottom of Stone-Provide liner per geo recommendation Project Name: McCoy Farm
LPE=618.13 \ \ \ I \ I I 2 610.5 Top of Stone/Bottom of Sand Sequence ID: 2 Pes n
611.5 Top of Sand Filter/Bottom of Extended Dry Detention Pond Drainage Area (acre ;): 6.3
1611.5 2,650 0 0 2,650 0 0 Pond Bot Land Use/Development Type: >2 acres Residential Open Space master planning . civil engineering
612.0 8,050 2,675 2,675 2,200 10,000 3,163 3,163 613.0 9,500 8,775 11,450 5,800 15,000 12,500 15,663 Vegetation Type: Grassed urban design . landscape architecture
Percent Buift-Upon Area: 45%
614.0 16,500 15,750 31,413 919 berryhill rd.ste 101.charlotte,nc 28208
31. Sediment Chamber Length(ft): 80 704.332.1204 . www.d
N�o a 614.5 17,200 8,425 39,838 pr.design
/ 5 \ 2'o9.3„w o 61a — _ _ 615.0 17,900 8,775 48,613 Sediment Chamber Width ft. : 81 NC Firm License#C-0560
616.0 19,500 18,700 67,313 Pond Top Sediment Chamber Height ft. : 1
Sand Filter Type: Surface 2
xi Media Depth ft. : 1
Media Surface Area ft2 : 2,650 CLIENT/OWNER
MILLS VENTURES, LLC.(R. DEAN HARREL)
Flow Diverter Present (YIN): N
Static Water Quality Elevation @ 612.37 ft 5615 POTTER ROAD
Regulated By: Watershed Overlay MATHEWS, NORTH CAROLINA 28104
Design Static Water Quality Elevation @ 613.00 ft 704.870.4614
3-02 a' Static Channel Protection Elevation @ 613.87 ft Treatment Effectiveness: Optimal
�l� � .0
o�
PROP. RIP-RAP ESHTW=608(615.00- 7)IN THE SUMMIT GEOTECH REPORT DATED 2020-01-312. NC State Plane Xeasti 1498750 SURVEYORNC State Plane Y(northing): 463440 EAGLE ENGINEERING
APRON 1 2013A VAN BUREN AVE.
2�0 I INDIAN TRAIL, NORTH CAROLINA 28079
PROP. WASHED STONE RIP-RAP /� g \
BERM, 2' WIDE @ TOP. WETLANDS
P�` 2.4222
( I WETLANDS
SCM OUTLET STRUCTURES
SCM OUTLET PIPE LOWRYS ENVIRONMENTAL&ECOLOGICAL SERVICES
CLEAN-OUT @ END OF PIPES &ALL BENDS, I W 1823 QUINN ROAD
TYP. W/WATER-TIGHT VANDAL PROFF CAPS. I ( W \ FROM NCDOT FROM INVERT INVERT TO PIPE CHESTER, SOUTH CAROLINA29706
W W TYPE RIM DEPTH LENGTH SLOPE REMARKS
EXTEND 6"ABOVE FINAL SURFACE. W W W . STRUCTURE STD# STRUCTURE UP DOWN STRUCTURE SIZE
GEOTECH
PROPOSED SAND MEDIA AREA- 2,650 SF. I �� 2C-01 OCS 2C-01 609.20' 608.80' 2C-02 24" 60' 0.66% RCP SUMMIT ENGINEERING
3575 CENTRE CIRCLE DRIVE
2C-02 FES- 20.22 FORT MILL, SOUTH CAROLINA 29715
\ W W W 704.504.1717
�\ \ + �� FEMA
MAP#3710449600J, EFFECTIVE 10/16/2008
KEY MAP
Cos
PROP. 6" PERFORATED UNDERDRAIN IL 6 ° 10' PROP. CONC. SPILLWAY @ 615.00.
PIPES @ 0.5% MIN, TYP. PROVIDE (6)
ROWS OF 35 LF. OF UNDERDRAIN, I
SCH-40 PVC OR DOUBLE HDPE.
PROP. RIP-RAP
APRON
B PROP. 6" SOLID UNDERDRAIN, \
\ SCH-40 PVC OR DOUBLE HDPE. 0 2C-02
N
o
/ _
ITOP-616,00 PROJECT
coo —! / / i l �1
V A,� PROP. OUTLET PIPE �� li ��I MCCOY FARM
i
AND STRUCTURE
V PCCE - PCCE �V ll
Lw
W �6�6� / � ./ VA k� 0
i
ry
WESLEY CHAPEL ROAD
z � L PROP. LOG /� �
WESLEY CHAPEL, NORTH CAROLINA
W /�l PROJECT NUMBER
19076
m , SCALE:1"=50'
0 25' 50' 100, �� DATE
LO
05/07/2021
N
I
SCM #2 - SAND FILTER ISSUED FOR
0 CONSTRUCTION DOCUMENTS
PLAN 1"=50'
/ REVISIONS
p NO. DATE DESCRIPTION BY
U
W NO REVISION, ORIGINAL
0 02/09/2022 SUBMISSION JF/JM/HN
L7 REVISION PER 1ST CITY
/
W 1 08/12/2022 COMMENTS JM/HN
REVISION PER 2nd CITY
2 09/23/2022 COMMENTS JM/HN
L7
REVISION PER NCDOT
w
W 3 07/05/2023 COMMENTS JM/HN
REVISION PER NCDOT
L7
/ 4 12/15/23 AND E&SC COMMENTS JM/HN
Q SCM 1 &ROADWAY
U 5 04/04/24 IMPROVEMENT REVISION JM/HN
REVISON PER NCDEQ
Q 6 06/19/24 REVIEW COMMENTS JM/HN
U
N
U)
N
I
Q
O PROJ. MANAGER: HN
0 DRAWN BY: JM
CHECKED BY: HN
_C SEAL
Y
I
L�
c Oe-t��SaS/0 7i
a
ea SEAL <°
U
030523
o VC by
0
� GINE��
NGv� �A
0
0
N
(n SCALE
AS INDICATED
N
O
L
n DRAWING
SCM ENLARGEMENT PLAN
/
N
0
C2 =6
COPYRIGHT©2020 DPR ASSOCIATES,INC.THE PLAN OR DRAWING AND ANY ACCOMPANYING DOCUMENTS OR CALCULATIONS ARE THE PROPERTY OF DPR ASSOCIATES,INC.AND ARE INTENDED SOLEY FOR THE USE OF THE RECIPIENT NOTED.NO THIRD PARTY USE OR MODIFICATION IS PERMITTED WITHOUT WRITTEN AUTHORIZATION. ORIGINAL SHEET SIZE:24"X 36"

SCM#1 &#2
Environmental
NCDEQ Stormwater Design Manual Z.
Quality
Table 1: Sample Operation and Maintenance Provisions for Sand Filters
PotentialSCM element: problems: problem:
Entire sand filter Trash/debris is present. Remove the trash/debris.
Adjacent pavement(if Sediment is present on the Sweep or vacuum the sediment ..c:_,Ign . Ianu�__,_,_ui I-i iimt-,um
applicable) pavement surface. as soon as possible.
Regrade soil if necessary to NC Firm I i-ense#C-nrtin
Areas of bare soil and/or remove the gully, plant ground
erosive gullies have formed. cover and water until it is
established. Provide lime and
Perimeter of sand filter CLIENT/OWNER
a one-time fertilizer application.
MILLS VENTURES, LLC.(R. DEAN HARREL)
5615 POTTER ROAD
Vegetation is too short or too Maintain vegetation at an MATHEWS, NORTH CAROLINA 28104
long. appropriate height. 704.870.4614
SURVEYOR
EAGLE ENGINEERING
Unclog the sructure and 2013A VAN BUREN AVE.
The structure is clogged. dispose of sediment in a INDIAN TRAIL, NORTH CAROLINA 28079
location where it will not cause 704.882.4222
The flow diversion structure impacts to streams or the SCM.
(if applicable) WETLANDS
LOWRYS ENVIRONMENTAL&ECOLOGICAL SERVICES
Make any necessary repairs or 1823 QUINN ROAD
The structure is damaged. replace if damage is too much CHESTER, SOUTH CAROLINA29706
for repair.
GEOTECH
Search for the source of the SUMMIT ENGINEERING
sediment and remedy the 3575 CENTRE CIRCLE DRIVE
Sediment has accumulated to a problem if possible. Remove FORT MILL, SOUTH CAROLINA 29715
depth of greater than six the sediment and dispose of it 704.504.1717
inches. in a location where it will not FEMA
cause impacts to streams or MAP#3710449600J, EFFECTIVE 10/16/2008
Sediment chamber(forebay) the SCM.
KEY MAP
Provide additional erosion
protection such as reinforced
Erosion has occurred. turf matting or riprap if needed
W1 +2'
W1 + 1 SPAN:MATCH TO SCM METAL GRATE. DIMENSIONS NOT SPECIFIED. OUTER EDGES APPROX. 6" TO 10" to prevent future erosionproblems.
WEIR SPECIFICATIONS. FROM OUTER EDGE OF OUTLET CONTROL UNIT. SLOT/SPACE OPENINGS TO BE NO
W1 TRASH RACK IS NOT TO SMALLER THAN 2" X 2" TO ALLOW FLOW OF WATER. TO BE DESIGNED BY
OUTLET
IMPEDE WEIR OPENING MANUFACTURER TO BE USED AS AN ACCESS AND TO SUPPORT HUMAN LOADS. Remove the weeds, preferably
DIMENSIONS.
PIPE ACCESS TO STRUCTURE'S STEPS MUST BE PROVIDED. by hand. If a pesticide Is used,
RISE:MATCH TO SCM BAR SCREEN TRASH RACK, TYP. Weeds are present.
WEIR SPECIFICATIONS. wipe It on the plants rather than
TRASH RACK IS NOT spraying.
(Z 3/8"x 3"LAG TO IMPEDE WEIR
BOLTS INTO CONC. OPENING DIMENSIONS.
N
REQ(MIN.3 'D
r� TOP OF SLAB Check to see if the collector
EACH SIDE.) Sand Filter Maintenance Tasks and Schedule system is clogged and flush if
EXPANSION BOLTS
+ + 12 GAUGE ALUMINUM (4 REQ'D) Sand chamber and Water is ponding on the surface necessary. If water still ponds,
N I PLATE(ROLLED& TASK SCHEDULE for more than 24 hours after a remove the top few inches of
o BENT TO SHAPE.) underdrain collection system storm. filter bed media and replace. If
n1 + _ 1 Street sweep parking lot Quarterly P
\ w w 2" X 2" X / water still ponds, then consult
rn Trash removal Monthly PROJECT
\
ANGLE (TYP.) an appropriate professional.� Of Inspect outlet for obstructions Monthly
PROVIDE STEPS,15"O.C. _ Inspect for clogging Monthly M C C OY FARM
\ TO STRUCTURE BOTTOM. (V 1/2 REBAR @
ORIFICE&SHIELD 5 0.C. Inspect inlet grates Monthly Clogging has occurred. Clean out the outlet device.
gg g Dispose of the sediment offsite.
(SEE DETAIL AT RIGHT) Skim sand media Yearly p
p WEIRS MAY BE 2" X 2" X 1 4 EXPANSION BOLTS p Outlet device
EDGE OF / Pump oil and grit from sedimentation Yearly or at 50/o full
COMBINED WITH ANGLE TYP. (4 REQ'D) chamber
PRE-CAST BASE ORIFICE THROUGH "NOTCH"WEIRS. Repair or replace the outlet
W • MANUFACTURER TO DETERMINE OUTSIDE DIMENSIONS RISER WALL FRAME OPENINGS AS Replace sand media As needed(expect 3 years) The outlet device is damaged device.
12 OF STRUCTURE(S). NEEDED. DIAGRAMS
W ARE GENERAL AND
• IF APPLICABLE, REFER TO EACH SCM'S CROSS-SECTION MAYBE ALTERED AS Q • w
CD • TOP AND BOTTOM OF SHIELD TO BE OPEN. g p g WESLEY CHAPEL ROAD
WEIRS-RISE"AND"SPAN" "RISE"
LONG AS RISE AND � Erosion or other signs of Repair the damage and
Off A-ADETAILS FOR WEIRS • BOTTOM OF SHIELD TO BE 12"BELOW w w
< SPECIFICATIONS. WEIRS SHOULD BE LOCATED ON(4) "SPAN"DIMENSIONS cn w damage have occurred at the improve the flow dissipation WESLEY CHAPEL, NORTH CAROLINA
ORIFACE; REFER TO EACH SCM A-A DETAIL 9 p p
SIDES OF STRUCTURES UNLESS SPECIFIED OTHERWISE, ARE MAINTAINED AND tr z outlet. structure.
GRILL SPACING IS SPAN
W THEREFORE(2)x W1 +(2)x W2=WIER"SPAN"+ • TOP OF SHIELD TO BE JUST BELOW TRASH
MAINTAINED. cn PROJECT NUMBER
REQUIRED SPACE FOR TRASHRACKS. TRASH RACKS <
a_ REQUIRED ON LARGE HORIZONTAL WEIR; REFER Receiving water
12 ARE NOT TO IMPEDE SPECIFIED"RISE"OR"SPAN" TO EACH SCM A-A DETAIL FOR SPECIFICS. O O Discharges from the sand filter 19076
m DIMENSIONS. 5"O.C. are causing erosion or Contact the local NCDEQ
� OUTLET STRUCTURE ORIFICE SHIELD � 4" � DATE
sedimentation in the receiving Regional Office.
v OUTLET CONTROL STRUCTURE ORIFICE SHIELD-TOP VIEW ORIFICE TRASH RACK DETAILS D2 SAND FILTER MAINTENANCE TASK AND SCHEDULE water.
05/07/2021
D1 DETAIL NOT TO SCALE DETAIL NOT TO SCALE C-6. Sand Filter Revised: 11/20/2020 ISSUED FOR
o CONSTRUCTION DOCUMENTS
MOORESVILLE STORMWATER MAINTENANCE REVISIONS
0 SUPERVISOR AT 704-799-4264 NO. DATE DESCRIPTION BY
U
Ld NO REVISION, ORIGINAL
0 02/09/2022 SUBMISSION JF/JM/HN
(n REVISION PER 1ST CITY
W ELEVATIONS SPECIFIED ON INDIVIDUAL SCM 1 08/12/2022 COMMENTS JM/HN
TOP OF EMBANKMENT PLANS; REFER TO SERIES C2 FOR EXACT
(n POURED-IN-PLACE #5 REBAR @ 6" OC IN ELEVATIONS OF SPILLWAY AND TOP OF BANK. REVISION PER 2nd CITY
CONCRETE FRONT & REAR FACE OF 2 09/23/2022 COMMENTS JM/HN
U) COLLAR. REBAR TO HAVE 6" SPILLWAY CREST REVISION PER NCDOT
W MIN. CONIC COVER FROM
EDGE OR FACE OF COLLAR 3 07/05/2023 COMMENTS JM/HN
POND COLLARS X Y 3 3 3 — III—III—III—III-
_ #OF 3 REVISION PER NCDOT
/ 1 1 1 —I I— -III 1
4 12/15/23 AND E&SC COMMENTS JM/HN
LEVEL< SCM 1 2 SPILLWAY -I
EL
SCM 1 &ROADWAY
U POND ANCHOR BLOCK VOLUME REQUIRED WEIGHT REQUIRED # 7.5' 7.5' SPILLWAY CREST COMPACTED CREST 5' 5 04/04/24 IMPROVEMENT REVISION JM/HN
/ (CF) APPROX. (LB) MINIMUM. Y SCM #2 3 6.5' 6.5 SUBGRADE III,
REVISON PER NCDEQ
SCM #1 NOT REQUIRED _
SCM #2 NOT REQUIRED - = COMPACTED 6 06/19/24 REVIEW COMMENTS JM/HN
SUBGRADE
U EMERGENCY SPILLWAY: ONLY IF CONCRETE IS SPECIFIED ��\\
N ANCHOR BLOCKS TO BE DESIGNED BY THE MANUFACTURER TO MEET (CONCRETE, RIP-RAP, OR 5" THICK 3000 PSI CONC. W/
Q) VOLUME AND WEIGHT REQUIREMENTS. NX OUTLET PIPE GRASS TYPE SPECIFIED ON SCM NOTE: 6X6, 10/10 ,, 1U) PLANS. REFER TO SPECIFIC WWF 2" FROM TOP
PLANS ON SERIES C2. —III_
NOTES: ) 1. PROVIDE EXPANSION JOINTS AT 10' ON CENTER. 8' -
1. ALL CONCRETE TO BE 3000 PSI NON-FLY ASH 2. EXTEND SPILLWAY FROM V BELOW CREST ON UPSTREAM REQUIRED FOR ALL SPILLWAYS
FACE TO TOE ON DOWNSTREAM FACE OF SLOPE. CLASS I RIP-RAP, d50 MEDIAN, PROJ. MANAGER: HN
0 3. FOR GRASS SPILLWAYS, LINE ENTIRE SPILLWAY WITH DIA. = 8" ON FILTER FABRIC.
CD NORTH BY: JM
CD NO TH A E .RIC N GREEN SC250 PERMANENT MATTING, ONLY IF CONCRETE IS SPECIFIED
CHECKED BY: HN
4. PROVIDE RIP-RAP AT TOE ON DOWNSTREAM SIDE, 5'WIDE
0
ALONG SPILLWAY. SEAL
Y
I D3 ANCHOR BLOCK SPECIFICATIONS D4 CONCRETE ANTI-SEEP COLLARS D5 SPILLWAY SPECIFICATIONS
E
Lp DETAIL NOT TO SCALE DETAIL NOT TO SCALE DETAIL NOT TO SCALE CARO
>, 'Os
S/O
o NOTES' GENERAL MAINTENANCE GUIDELINES'
QUARTERLY: °
SEAL <°
U CONTRACTOR MUST CONSTRUCT ALL SCMs TO THE MINIMUM DESIGN SURFACE AREAAND VOLUME AS SPECIFIED. GENERAL MAINTENANCE: • INSPECT THE COLLECTION SYSTEM (I.E., CATCH BASIN, PIPING, GRASSED SWALES) FOR PROPER FUNCTIONING. 030523
co 0 CLEAR ACCUMULATED TRASH FROM BASIN GRATES, AND BASIN BOTTOMS, AND CHECK PIPING FOR
• CONVERT TO E&SC BASIN S TO SCMs ONLY AFTER THE ENTIRE CONTRIBUTING DRAINAGE AREA IS STABILIZED. OBSTRUCTIONS.
( � • IF AN SCM IS FLOODED, REFER TO THE DEWATERING DETAIL IN SERIES C6. .S, = °°°°°GINS°°
SAND FILTERS'BEDS, IF APPLICABLE, MUST ONLY BE CONSTRUCTED AFTER SITE CONSTRUCTION IS COMPLETED MOW SIDE SLOPES ACCORDING TO THE SEASON AND SPECIES OF VEGETATION. NGv• CHECK BMP INLET PIPES FOR UNDERCUTTING. REPAIR IF NECESSARY. �' °°° . �A
• �
j AND UPSTREAM DRAINAGE AREA IS COMPLETELY STABILIZED. INVASIVE SPECIES SHALL BE REMOVED WHEN THEY SURFACE IN THE SCM AREA. REPAIR ANY BROKEN PIPES. II O(0
• ALL COMPONENTS OF THE ENGINEERED STRUCTURES ARE TO BE KEPT IN GOOD WORKING ORDER. • REPLACE RIP RAP THAT IS CHOKED WITH SEDIMENT.
p • WHEN CONVERTING BASINS TO SCM SAND FILTERS, IF APPLICABLE, CONTRACTOR SHALL EXCAVATE TO ENSURE A • RESEED GRASSED SWALES TWICE YEARLY. REPAIR ERODED AREAS IMMEDIATELY.
j MINIMUM OF 1%DRAINAGE IS PROVIDED ALONG BOTTOM OF SCM. • IN CASE THE OWNERSHIP OF THE STORMWATER CONTROL STRUCTURE TRANSFERS, THE CURRENT OWNER . INSPECT CONDITION OF SAND MEDIA, REPAIR/REPLACE AS NECESSARY.
SHALL, WITHIN THIRTY(30) DAYS OF TRANSFER OF OWNERSHIP, NOTIFY NCDEQ OF SUCH OWNERSHIP SCALE
TRANSFER.
0 YEARLY/ANNUALLY: AS INDICATED
MONTHLY AND WITHIN 24 HOURS AFTER EVERY STORM EVENT GREATER THAN 1.0 INCH:
In • REMOVE ACCUMULATED SEDIMENT FROM BOTTOM OF OUTLET STRUCTURE. DRAWING
/ • REMOVE DEBRIS AND SEDIMENT FROM SCM &TRASH RACK. • CHECK AVAILABLE PONDING DEPTHS AT SEVERAL LOCATIONS IN THE FOREBAY/SEDIMENT BASIN USING THE SCM ENLARGEMENT DETAILS
REMOVE SILT FROM DISCHARGE OPENING&GRATES•
MEASURING DEVICE. THE MEASURING DEVICE USED TO DETERMINE THE SEDIMENT ELEVATION SHALL BE SUCH
• CHECK AND CLEAR ORIFICE OF ANY OBSTRUCTIONS. THAT IT WILL GIVE AN ACCURATE DEPTH READING AND NOT READILY PENETRATE INTO ACCUMULATED
j • CHECK POND SIDE SLOPES; REMOVE TRASH, REPAIR ERODED AREAS BEFORE NEXT RAINFALL. SEDIMENTS.
• INSPECT CONDITION OF SAND MEDIA. SKIM 1ST LAYER OF SAND MEDIA AND REMOVE AS NECESSARY. (REPLACE
�j ENTIRE SAND MEDIA SECTION APPROXIMATELY ONCE EVERY 3 YEARS, OR AS NECESSARY)
-a
• SHOULD THE SAND MEDIA BECOME CONTAMINATED, THE ENTIRE SAND MEDIA LAYER IS TO BE REPLACED.
• PUMP OILS AND GRIT FROM SEDIMENT CHAMBER.
0
C2 =7
COPYRIGHT©2020 DPR ASSOCIATES,INC.THE PLAN OR DRAWING AND ANY ACCOMPANYING DOCUMENTS OR CALCULATIONS ARE THE PROPERTY OF DPR ASSOCIATES,INC.AND ARE INTENDED SOLEY FOR THE USE OF THE RECIPIENT NOTED.NO THIRD PARTY USE OR MODIFICATION IS PERMITTED WITHOUT WRITTEN AUTHORIZATION. ORIGINAL SHEET SIZE:24"X 36"