SW3230606_Plansheet - SCM Detail_20240208

INV/82e.74
/ EMBANKMENT CONSTRUCTION NOTES MINIMUM MAINTENANCE SCHEDULE NOTE
/ / / / a Q • ' / • THE PRECAST MANUFACTURER IS TO PREPARE AND
d / /' GENERAL 1. AFTER EVERY SIGNIFICANT RUNOFF PRODUCING SUBMIT TO THE ENGINEER DESIGN DETAILS ANDQ /Vy
Q / ` �.•
/ o INV.: 811.00 / 4 Q / / /•/. 1. THE POND AND DAM AREA SHALL BE CLEARED, RAINFALL EVENT AND AT LEAST MONTHLY: CALCULATIONS FOR THE STRUCTURES SHOWN �� \ i
v �' z z F .:day
_ GRUBBED AND STRIPPED OF ALL VEGETATIVE 1.1 INSPECT THE DETENTION BASIN SYSTEM BASED ON THE DESIGN CRITERIA SPECIFIED. THE
�� / / / '/ ' / / // / MATERIAL AND TOPSOIL PRIOR TO DAM FOR SEDIMENT ACCUMULATION, EROSION, TRASH DESIGN SHALL BE PERFORMED UNDER THE DIRECT _ a Io� 0
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CONSTRUCTION, THE DISPOSAL OF TREES, ACCUMULATION, VEGETATED COVER, AND SUPERVISION AND SEALED BY A PROFESSIONAL = U 0 w o� : 4 c
/ / T / �. / / / STUMPS, CONSTRUCTION DEBRIS, VEGETATIVE GENERAL CONDITION. ENGINEER REFEREED IN THE STATE OF NORTH - __? : c c
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I / / p / MATERIAL, ETC. SHALL NOT BE PERMITTED IN 1.2 CHECK AND CLEAR THE ORIFICE OF ANY CAROLINA EXPERIENCED IN THE DESIGN OF at5 z z ,� a
/ Q '/ / / / THE DAM OR POOL AREA OF THE POND. WHEN OBSTRUCTIONS THAT WOULD INTERFERE WITH PRECAST CONCRETE. THE DESIGN SHALL INCLUDE w Q
BLASTING IS USED TO REMOVE ROCK FROM THE THE DRAW DOWN PROVISION S FOR HANDLING STRESSES AND
POOL AREA, THE BLASTED AREA SHALL BE OF THE TEMPORARY POOL AS DESIGNED. CONSTRUCTION LOADS. REPRODUCED COPIES OF z��ii/ OVER-EXCAVATED TO A DEPTH OF AT LEAST 2. REPAIR ERODED AREAS IMMEDIATELY. RE-SEED ASTM C789 "STANDARD SPECIFICATIONS FORo
TWO FEET 2 BELOW FINISH GRADE AND THE EMBANKMENT AS NECESSARY TO MAINTAIN PRECAST REINFORCED CONCRETE BOX SECTIONS
BROUGHT BACK TO FINISH GRADE WITH CLEAN GOOD VEGETATIVE COVER. MOW VEGETATIVE FOR CULVERTS, STORM DRAINS, AND SEWERS" WILL
RELATIVELY IMPERVIOUS SOIL MATERIAL COVER ON EMBANKMENT TO MAINTAIN A NOT BE ACCEPTED AS A SUBSTITUTED FOR DESIGN.
p . COMPACTED IN PLACE. MAXIMUM HEIGHT OF SIX INCHES, REMOVE
/I i ;�..- / TRASH AS NEEDED.
Q EARTH FILL DAMS 3. INSPECT AND REPAIR THE COLLECTION SYSTEM
/ L2"x2"xl/4" GALVANIZED ANGLE b i
/ 1. SOIL MATERIALS USED FOR EARTH FILL WHICH/ (LE. CATCH BASINS, PIPING, SWALES, RIP RAP, OVERLAPPED AND BOLTED TO
ARE HIGHLY PERMEABLE OR WHICH EXHIBIT ETC.) QUARTERLY TO MAINTAIN PROPER RESTRAIN BAR GRATE AND AND :O: �,
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V v / / / SIGNIFICANT STILL ALLOW REMOVAL = 0) N
/ FUNCTIONING.
2. EMBANKMENTS FILL MATERIAL TO BE COMPACTED 4. REMOVE WOODY VEGETATION NOT PART OF THE I" THICK I/4" x WASHERS,
HEXHEAD _U :� m N z:Y
/ TO AT LEAST 95% STANDARD PROCTOR APPROVED PLAN ALONG THE DAM EMBANKMENT. BAR GRATE
COMPACTION. 5. REMOVE ACCUMULATED SEDIMENT FROM THE WET BOLT, WASHERS, a NUT =Z � o
/ 3. SHRINKAGE SWELL, OR DISPERSION SHALL NOT DETENTION BASIN SYSTEM SEMI-ANNUALLY OR TACK-WELD NUT To BACK SIDE �d°� �C0-
w I W / / __ --� b p� // / / / / / �� BE USED IN THE EMBANKMENT. WHEN THE DEPTH IS REDUCED TO 75% OF THE �' �ti
/ I \ / 4 TRENCHA CUTOFF ED SEDIMENT
PROVIDED WITH A M MI TRENCH)NUMWIDTH O DESIGN DEPTH. V F FIVE FEET SHALL BEDSPOSEDOF IN AN
/ � I i V � /// � ,� (5'). THE CENTERLINE OF THE CUTOFF TRENCH MANNER AND SHALL BE HANDLED IN A MANNER
\ / \ / - SHALL NOT BE LOCATED DOWNSTREAM OF THE THAT WILL NOT ADVERSELY IMPACT WATER
i 5 /// / INSIDE TOP OF SLOPE OF THE DAM. THE QUALITY I.E. STOCKPILING NEAR A WET 67" x 67" LOWER M
o I / / e V ( WELDED FRAME
/ / f 8\5 / CUTOFF TRENCH SHALL BE CAREFULLY DETENTION BASIN OR STREAM, ETC.). L2"x2"x1/4" GALVANIZED w
BACK-FILLED WITH HIGHLY IMPERMEABLE 6. PERFORM ANNUAL INSPECTION OF THE BASIN GALV. STEEL m L_ ~
/ / MATERIAL AND COMPACTED TO AT LEAST I/4A�N L `� o
- - - T / // (ANNUAL INSPECTION REPORTS TO BE KEPT BY coNCRETE EXPANSION BOLT �
a / /� / //// s�0 NINETY-FIVE PERCENT (95%) OF STANDARD THE OWNER). PRIOR TO INSPECTION NOTIFICATION
/ PROCTOR DENSITY. MUST BE GIVEN TO STORM WATER SERVICES. 0 Co
5. THE MINIMUM TOP WIDTH OF THE DAM SHALL BE BAR GRATE INSTALLATION a y r
PLANTS SHALL BE AT A RATE OF 50 PLANTS O7
� � � I HI 8 TEN FEET (10') AND SLOPES SHALL NOT BE N.T.S. z
PER 200 SF (SEE LANDSCAPING PLANS) \
HD: 815.94 STEEPER THAN 2:1 (TWO HORIZONTAL TO ONE
Q a/ V INV. IN: 808.63 (E) VERTICAL) ON THE DAM OR EMBANKMENTS
INV. OUT: 808.63 (SW) AROUND THE POND.
o \ / / 6. ALL DISTURBED GROUND AREAS AND 56"
EMBANKMENTS SURROUNDING THE POND SHALL
} �� \ a / •/ V BE MECHANICALLY STABILIZED AND HAVE
N ---- a X / PERMANENT GROUND COVER ESTABLISHED IN
J w VEGETATED SHELF / \ / / ACCORDANCE WITH THE PERMANENT SEEDING 55"
TOP ELEV: 809' a �' / / ) / / SCHEDULE.
HIBC o o BOTTOM ELEV.: 808' HI 3 / L2"x2"xl/4" GALV.
/ EXPANDED METAL GRATE STEEL ANGLE (TYP)
HD: 815.65 _ / A
131 Y / TRASH RACK FOR RISER WELDED FRAME FOR Cl)
A INV. IN: 808.40 (W)
z
o FRAME BOLTED TO 0
(SEE DETAILS) BAR GRATE PANELS
\ F- - - - - - - - - - - TOP OF CONCRETE
7 _ INV. IN: 808.14 (NE) � � � � � / � STORM Box WITH _
/ 120 HI 2 INV. OUT: 808.14 (S) \ 36" OUTLET PIPE Lo
/ �\ HD: 815.66 48"X48" INSIDE ww
/ LOCA _ v A ANo
A - - 120 A INV. OUT: 808.92 (E) v 60"X60" OUTSIDE
A A DIMENSIONS U) Cl)
/ ASIN \ INV.: 808.00 \\ ORIFICE OF NING z z
/ ( / 125 V /
0 0
INV: 802.78
Cy
L V A� / / OTY=1 w
A \ 5 \ WEIR OPENING
UWW� Oq A / / 5/16" HOLES 55" x 55" w
ASIN �� FOR CONC. ANCHOR I"x3" GALV. STEEL OR z a
\V A HIBC 131 BOLTS (TYP) ALUMINUM BAR GRATE
120 LOCA ) I V = FRAME & BAR GRATE CONSTRUCTION
TALL FESCUE ON ALL V\ V � a - z
VEGETATIVE SLOPES V �V A HIBC 67 i I/ / N.T.S.
(SEE GRASSING 121 I /
SPECS ON L2.3) Emmill, ,,, /_ -_____ / / I/ / / / EXPANDED METAL GRATE TRASH RACK FOR RISER
NOT TO SCALE
��' 60 _ � � ice/ /j� / I/ �/ / �� � 0
\ / /
6� TT 4s LOCA - / i - _ i i / / // / / ��� _�
/ ✓ .���/ / EXPANDED METAL GRATE (n z 0 0
CS 40 113 8`O � � - - - - - - - / / �����// /
�aTo, A FIR: 806.77 / _ / TRASH RACK FOR RISER 0 C
\� A ASIN / / _ _ - i / i (SEE DETAILS) 0 CV U
\ INV. OUT: 803.36 (SW) / / - _ _ - - /jam/�� / i (CONTRACTOR SHALL SUBMIT
\ \ V 117 / i / / i� SHOP DRAWINGS FOR CC) O
"' - - - - - - � � �� 4'-0" (D CT
rJ9 LF 36 RCP HIBC / / i / ��� APPROVAL BY THE ENGINEER) N
Wsos 0.60X \ V / // i i i - - - -/ i 3.00' WIDE X 1.00' (`)
V 121 / Q -C
LOCA / / // i i - // / TOP OF RISER = 812.00 TALL WEIR = 811.00 0
3.00' WIDE X 1.00'
127 / / / i i 8�0 /i TALL WEIR = 811.00
•- CV p
/ cc)2.00' WIDE X 1.00'
2.00' WIDE X 1.00' TALL WEIR = 810.00 w TALL WEIR = 810.00 U
/ OZ O
O N 17
V A \ / i / 2.5" ORIFICE = 808.50
2.5" ORIFICE = 808.50 0
OUTLET PIPE 0
55 III _
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I \ ���_ \ A \ _ _ / / / / / / i / (TYP.) 36" OUTLET PIPE INV.: 805.00
A �/ i POND BOTTOM= 804.50
INSTALL CLASS B RIP-RAP / / / / i
(SEE CONSTRUCTION PLANS C3.1-C3.3) / / _ ' / / i� , � � /���������������� "���� TOP OF SLAB = 804.00 ���� � � � : '����
// � � �A /\ m� \j° j\j
INV.: 803.00
GRAPHIC SCALE
BMP DATA TABLE 7'-0" 7'-0"
30 0 15 30 60 120 J
POND SPILLWAY POND ELEVATIONS SECTION A-A J Q
( IN FEET ) ID BOTTOM TOP DEPTH LENGTH (FT) ELEV. PERM. POOL 10-YR ELEV. 25-YR ELEV. 50-YR ELEV. GENERAL NOTES: '^
1. OUTFACE STRUCTURE SHALL HAVE 6" THICK WALLS AND 10" THICK BOTTOM. � 0
1 inch = 30 ft. 2. INSIDE DIMENSIONS OF OUTFALL STRUCTURE SHALL BE 5'-0" x 5'-0".
WET POND 01 804.5 814 9.5 10 812.50 808.50 812.01 812.59 812.93 3. ENDS OF ALL PIPES SHALL BE FLUSH WITH INSIDE WALL OF STRUCTURE. O
4. PIPE OPENINGS TO BE WATERTIGHT 0
CONTROL STRUCTURE z J Z
J_ Q
SAFETY FENCE
(ALONG PERIMETER) NOT TO SCALE s � �
Z
PON D SECTIONAL VIEW
� a Q
w J
BASIN LENGTH (SEE PLAN) 10' MIN. o
STORMWATER PROVIDE Q v z
RUNOFF WATERTIGHT S - 0
z
TRASH RACK TOP OF EMBANKMENT = 814.00 CONNECTION LL
0
2-YR STAGE ELEV. = 810.90 _ _ _ _ _ EMERGENCY SPILLWAY = 812.50 12" THICK (MIN.) 4 4 z Z
10-YR STAGE ELEV. = 812.01 (SEE DETAIL) CAST-IN-PLACE OR PRECAST W
25-YR STAGE ELEV. = 812.59 CONCRETE COLLAR 0
50-YR STAGE ELEV. = 812.93 RISER CREST = 812.00 (MIN. 2000 PSI) U) CL
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� �• EARTHEN DAM
ANTI-SEEP COLLAR SPECIFICATIONS W w
RIPRAP MIN. 2' 6' (TYP) ' PIPE RISER TO uj
L ---- BqS/ STABIILIZATION
---- N )NEST ANTI-SEEP COLLAR ID D). S NO. OF FIRST
(IN) COLLARS COLLAR
o MAIN POOL ELEV = 808.50 CONTROL (SEE DETAIL) (FT)
VE�ETATIV STRUCTURE WET POND
E S VEGETATIVE SHELF IP-RAP APRON
6:� S SHELF 3 5 SLOPE DETAIL) (SEE DETAIL) O1 36 54 2 10
LOP SEDIMENT FOREBAY o �0 0 5 5' MAIN _
FOREBAY DEPTH F R BAY ER POOL DEPTH 3 5� ___
NOTES:
�� (SEE DETAIL) �� SEDIMENT STORAGE ELEV_ 805.00
Q _-_-_-- 1. ALL COLLARS SHALL BE INSTALLED TO BE
BASIN BOTTOM = 804.50 -- ____ WATER-TIGHT. JOB NO: J-30017.0000
17 - 2. COLLAR DIMENSIONS TO EXTEND 18" (MIN) BEYOND DATE: 02/17/23
SEDIMENT STORAGE VSPECIFIED PIE DIAMETER ON ALL SIDES. DRAWN: NSS
FOREBAY ENTRANCE FOREBAY EXIT 36" CLASS IV RCP 3. FIRST ANTI-SEEP COLLAR TO BE LOCATED SLIGHTLY
ELEV: 805.00 ELEV: 804.50 OUTLET PIPE WITH DOWNSTREAM OF DAM CENTER LINE. DESIGNED: NSS
BASIN BOTTOM SLOPE RISER ANTI-FLOATATION WATERTIGHT JOINTS REVIEWED: JKS
FOREBAY ENTRANCE (0.5% MIN.) ANTI-SEEP COLLAR APPROVED: JKS
ELEV: 804.00
DUCTILE IRON MAINTENANCE SCALE: I = 30
NOT TO SCALE
DRAIN PIPE WITH SLUICE
SEDIMENT STORAGE WET DETENTION POND 01 GATE OR VALVE AT RISER
FOREBAY EXIT (0.50% SLOPE, MIN.)
ELEV: 805.00
NOT TO SCALE
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