B.08.02 - RTA Plans - W912HP25R0001 - FY25 AIWW Placement Area Diking CHS to PR.pdf
PDF 12 MB Posted
- Solicitation number
- W912HP25R0001
About this file
This file contains detailed engineering drawings and specifications for dike construction and spillway systems at four Atlantic Intracoastal Waterway (AIWW) placement areas: 1717 C-P, 1789 C-P, 1835 C-P, and 2237 C-P located in Charleston and Colleton Counties, South Carolina.
The drawings specify elevation requirements, construction details, and technical specifications for perimeter dikes, spillways, and associated infrastructure. Key requirements include: dike top elevations ranging from 11.0' to 21.0' depending on location; installation of multiple 4'x4' spillways with specific invert elevations; 30" HDPE pipe installations with defined slopes; wooden walkway construction details; splash pad installations; and silt fence requirements. The plans include cross-sections, plan views, and detailed technical drawings for spillway risers, foundations, and support structures. Each placement area has specific borrow elevation limits (ranging from 2.0' to 10.0') and detailed requirements for dike construction, including slopes, berms, and drainage systems.
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Text version
SC
-1
DA
W
HO
R
D
BALDWIN LN
ROCK CREEK
JEHOSSEE RD
DAWHO RIVER
NO
RT
H
CR
EE
K
FI
SH
IN
G
C R
EE
K
D
AW
H O
O B
R
ID
G E
ASHEPOO RIVER
PINE LANDING RD
SOUTH EDISTO RIVER
ASHEPOO COOSAW CUTOFF
A
SHEPOO C
OOSAW
C
UTO
FF
0+00.00
9+12.96 0+62.93
SPILLWAY NO. 2
STA: 33+00 OFF:78'R
TOP EL.: 15.5
INV. OUT: 0.2
SPILLWAY NO. 4
STA: 26+75 OFF:83'R
TOP EL.: 22.5
INV. OUT: 7.0
SPILLWAY NO. 5
STA: 15+95 OFF:83'R
TOP EL.: 25.0
INV. OUT: 9.5
SPILLWAY NO. 6
STA: 48+55 OFF:88'R
TOP EL.: 24.5
INV. OUT: 9.0
SPILLWAY NO. 7
STA: 51+85 OFF:85'R
TOP EL.: 24.5
INV. OUT: 9.0
SPILLWAY NO. 1
STA: 17+23 OFF:76'R
TOP EL.: 16.5
INV. OUT: 1.0
HIGH POINTINV. = 17.80'
INV. = 16.00'
NEW DIKE SECTION(TYPICAL)
OUTFALLFINGER DIKEEL.: 35.0'
1.5:1
SPLASHPAD(SEE NOTE 11, THIS PAGE)
INSIDE MIDDLE CELL
PLACEMENT AREA EXTERIOR
8" TO 12" CLEARGAP BETWEENWALKWAY ANDSPILLWAY
NEW DIKE SECTION(TYPICAL)
OUTFALLFINGER DIKEEL.: 11.0'
71' OF 30" HDPE
SLOPE: -0.50%
96' OF 30" HDPE
SLOPE: 1.00%
63' OF 30" HDPE
SLOPE: -1.00%
57' OF 30" HDPE
SLOPE: 1.50%
47' OF 30" HDPE
SLOPE: -1.60%
73' OF 30" HDPE
SLOPE: 1.50%71' OF 30" HDPE
SLOPE: -0.50%
74' OF 30" HDPE
SLOPE: -0.50%
76' OF 30" HDPE
SLOPE: -0.50%
50' OF 30" HDPE
SLOPE: -0.84%
OUTFALLFINGER DIKEEL.: 11.0'
OUTFALLFINGER DIKEEL.: 15.0'
OUTFALLFINGER DIKEEL.: 15.0'
OUTFALLFINGER DIKEEL.: 21.0'
OUTFALLFINGER DIKEEL.: 21.0'
OUTFALLFINGER DIKEEL.: 21.0'
OUTFALLFINGER DIKEEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
EXISTINGFINGER DIKE
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 21.0' 16' TOP WIDTHEL.: 21.0' 16' TOP WIDTHEL.: 21.0'
16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0'
16' TOP WIDTHEL.: 11.0' 16' TOP WIDTHEL.: 11.0'
SPLASHPAD(SEE NOTE 11,THIS PAGE)
SPLASHPAD(SEE NOTE 11,THIS PAGE)
SPLASHPAD(SEE NOTE 11,THIS PAGE)
SPLASHPAD(SEE NOTE 11,THIS PAGE)
SPLASHPAD(SEE NOTE 11,THIS PAGE)
SPLASHPAD(SEE NOTE 11,THIS PAGE)
SPLASHPAD(SEE NOTE 11,THIS PAGE)
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 17.0' 16' TOP WIDTHEL.: 17.0'
16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 15.0' 16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 15.0'
16' TOP WIDTHEL.: 15.0' 16' TOP WIDTHEL.: 15.0' 16' TOP WIDTHEL.: 15.0' 16' TOP WIDTHEL.: 15.0'
NEW DIKE SECTION(TYPICAL) SPILLWAY NO. 8
STA: 19+50 OFF:67'R
TOP EL.: 21.0
INV. OUT: 5.5
SPLASHPAD(SEE NOTE 11,THIS PAGE)
PROPOSED FINGER DIKEEL. = 17.0'(BUILD TO ENTIRE LENGTH)
135' OF 30" HDPESLOPE: 1.00%
89' OF 30" HDPE
SLOPE: 1.50%
114' OF 30" HDPE
SLOPE: 1.50%71' OF 30" HDPE
SLOPE: -0.57%
SPILLWAY NO. 3
STA: 2+16 OFF:91'R
TOP EL.: 21.5
INV. OUT: 6.0
115' OF 30" HDPE
SLOPE: 3.00%
126' OF 30" HDPE
SLOPE: 3.00%
CHECKVALVE(SEE NOTE 15,THIS PAGE)
CHECKVALVE(SEE NOTE 15,THIS PAGE)
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9377+009378+009379+009380+00
9381+00
9382+00
9383+00
9384+00
9385+00
9386+00
8317+01
N: 256704 E: 2180814
N: 284942 E: 2190553
N: 285665 E: 2195225
N: 291251 E: 2199511
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
E
F
G
H
J
K
L
M
N
P
SU
BM
IT
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D B
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C H
EC
KE
D B
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D R
AW
N
B Y:
D
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IG
N
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B
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FI
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N
AM
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D
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IG
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F
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IS
SU
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SI
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M
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C R
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D
AT
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SHEET ID
SOLICITATION NO.:
CONTRACT NO.:
ISSUE DATE:
CHARLESTON DISTRICT
FY25 AIWW PLACEMENT AREA
DIKE CONSTRUCTION
CHARLESTON TO PORT ROYAL
W912HP25R0001
23 OCTOBER 2024
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US Army Corps of Engineers
U .S
. A R
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US Army Corps of Engineers ®
INDEX OF DRAWINGS
SHEET NO. NAME
C-100 LOCATION MAP AND INDEX OF DRAWINGS
PLACEMENT AREA 1717 C-P
C-101 PLACEMENT AREA 1717 C-P EXISTING CONDITIONS AND WORK REQUIREMENTS
C-201 PLACEMENT AREA 1717 C-P PERIMETER DIKE STATIONS 0+00 TO 40+00
C-202 PLACEMENT AREA 1717 C-P PERIMETER DIKE STATIONS 45+00 TO 60+00
C-301 PLACEMENT AREA 1717 C-P SPILLWAY SECTIONS
PLACEMENT AREA 1789 C-P
C-102 PLACEMENT AREA 1789 C-P EXISTING CONDITIONS AND WORK REQUIREMENTS
C-203 PLACEMENT AREA 1789 C-P PERIMETER DIKE STATIONS 0+00 TO 40+00
C-204 PLACEMENT AREA 1789 C-P PERIMETER DIKE STATIONS 45+00 TO 55+00
C-302 PLACEMENT AREA 1789 C-P SPILLWAY SECTIONS
PLACEMENT AREA 1835 C-P
C-103 PLACEMENT AREA 1835 C-P EXISTING CONDITIONS AND WORK REQUIREMENTS
C-205 PLACEMENT AREA 1835 C-P PERIMETER DIKE STATIONS 0+00 TO 40+00
C-206 PLACEMENT AREA 1835 C-P PERIMETER DIKE STATIONS 45+00 TO 55+00
C-303 PLACEMENT AREA 1835 C-P SPILLWAY SECTIONS
PLACEMENT AREA 2237 C-P
C-104 PLACEMENT AREA 2237 C-P EXISTING CONDITIONS AND WORK REQUIREMENTS
C-207 PLACEMENT AREA 2237 C-P PERIMETER DIKE STATIONS 0+75 TO 16+00
C-208 PLACEMENT AREA 2237 C-P PERIMETER DIKE STATIONS 18+00 TO 20+00
C-304 PLACEMENT AREA 2237 C-P SPILLWAY SECTIONS
DETAILS
C-901 SPILLWAY INSTALLATION DETAILS --
C-902 SPILLWAY RISER DETAILS --
C-903 SILT FENCE DETAILS --
O
C T
N .T
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JJ
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M C
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O H
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C O
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C-100
IF
B
N O
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2H P2
5R
C H
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A
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SHEET 1 OF 20
RTA
SUBMITTED BY:
CHIEF, NAVIGATION BRANCH
APPROVED BY:
CHIEF, OPERATIONS DIVISION
SITES
VICINITY MAP
00 5000' 10000'
PLACEMENT AREA
2237 C-P
PLACEMENT AREA
1835 C-P
PLACEMENT AREA
1789 C-P
PLACEMENT AREA
1717 C-P
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED ON FEBRUARY 2024
LIDAR. THIS DRAWING IS TO BE USED FOR GENERAL SITE CONDITIONS ONLY.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH CAROLINA STATE
PLANE COORDINATE SYSTEM, NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THIS SHEET INDICATES THE GENERAL REQUIREMENTS OF THE WORK. THE DIKES
AND BERMS AROUND THE PERIMETER OF THE SITE SHALL BE CONSTRUCTED AS
SHOWN ON CROSS SECTION SHEETS.
4. THE BORROW AREA IN THE PLACEMENT AREA CONSISTS OF ALL AREAS INSIDE OF
THE BERM THAT ARE AT AN ELEVATION INDICATED ON THE DRAWING OR HIGHER.
THIS WILL REQUIRE HAULING OF FILL FROM BORROW AREAS TO THE DIKE
SECTION.
5. CONTROLLED DRAINAGE MUST BE MAINTAINED IN ACCORDANCE WITH ALL LAWS
AND REGULATIONS THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
6. SILT FENCES SHALL BE USED ALONG THE OUTSIDE EXTERIOR SLOPE OF THE DIKE
CONSTRUCTION AREA IN ORDER TO CONTROL SEDIMENT FROM ENTERING THE
MARSH. NO FILL SHALL BE PLACED OR FLOW INTO THE MARSH. CONTRACTOR
SHALL PROVIDE DOUBLE ROW SILT FENCE IN ACCORDANCE WITH ALL
APPLICABLE SOUTH CAROLINA STATE REQUIREMENTS.
7. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN RAISING DIKE WHERE NO
CROSS SECTIONS ARE SHOWN.
0+ 00 1+
00 2+ 00 3+
00 4+ 00 5+
00 6+ 00 7+
00 8+ 00 9+
00 10 +0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
24+00
25+00
26+00
27+00
28+00
29+00
30+00
31+00
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
56+00
57+00
58+00
59+00
60+00
61+00
62+00
63+00
6 6
PLACEMENT AREA
1717 C-P
50 AC
BORROW LIMIT: EL. 2.0'
8549+00
8550+00
8551+00
8548+00
8545+00
8546+00
8547+00
8552+00
8553+00
8544+00 8534+00
8535+00
8536+00
8533+00
8530+00
8531+00
8532+00
8541+00
8542+00
8543+00
8540+00
8537+00
8538+00
8539+00
8529+00
8526+00
8527+00
8528+00
8525+00
8523+00
8524+00
8529+288531+25
8533+23
8543+94
8550+71
8552+66
8554+62
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
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F
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K
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BM
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D B
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D B
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D R
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RTA
SHEET 2 OF 20
00 100' 200'
PLACEMENT AREA 1717 C-P WORK REQUIREMENTS
STATIONING REQUIREMENTS
PERIMETER DIKE REQUIRED TOPS OF DIKE ELEVATION: 11.0'
0+00 TO 63+67 SEE CROSS SECTIONS ON C-201 & C-202
SPILLWAYS NEW 4' x 4' SPILLWAYS
17+23 & 33+00 SEE CROSS SECTIONS ON C-301
NEW SPILLWAY LOCATION
STA. 17+23
EXISTING SPILLWAY
STA. 33+00
TO BE REPLACED
8. THE SITE WAS LAST PUMPED INTO IN JUNE 2023 AND HAS BEEN PASSIVELY
DEWATERED SINCE. IT IS THE CONTRACTOR'S RESPONSIBILITY TO ASSESS THE
EXISTING CONDITIONS AND DIFFICULTY OF PERFORMING THE WORK.
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 0+50
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 5+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 10+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 15+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 20+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 25+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 30+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 35+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 40+00
0 20 40 60 80 100 120 1400-20
3:1 2:1
13.4'
3:1
2:1
5.9'
3:1
2:1
7.0'
3:1 2:1
12.9'
3:1 2:1
20.9'
3:1 2:1
13.4'
3:1 2:1
13.8'
3:1 2:1
14.8'
3:1 2:1
12.4'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
BORROW LIMIT EL. 2' BORROW LIMIT EL. 2' BORROW LIMIT EL. 2'
BORROW LIMIT EL. 2' BORROW LIMIT EL. 2' BORROW LIMIT EL. 2'
BORROW LIMIT EL. 2' BORROW LIMIT EL. 2' BORROW LIMIT EL. 2'
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED
ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH
CAROLINA STATE PLANE COORDINATE SYSTEM, NAD83
(NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE TO
BE EVENLY TRANSITIONED BETWEEN THE CROSS SECTION
STATIONS SHOWN.
5. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN
RAISING DIKE WHERE NO CROSS SECTIONS ARE SHOWN.
6. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED TO
BERM GRADE PRIOR TO ADDITIONAL DIKE CONSTRUCTION.
7. CONTROLLED DRAINAGE MUST BE MAINTAINED IN
ACCORDANCE WITH ALL LAWS AND REGULATIONS
THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
8. IN ANY PLACE WHERE THE REQUIRED PROFILE INSIDE THE
DIKED AREA IS BELOW EXISTING GROUND, CUTTING IS NOT
REQUIRED. COMPACT ACCORDING TO SPECIFICATIONS.
9. IN ANY PLACE WHERE THE EXISTING GROUND TO THE
EXTERIOR OF THE DIKES IS ABOVE THE REQUIRED PROFILE,
DRAINAGE MUST BE MAINTAINED. SLOPES MAY TIE IN
FLATTER THAN 3:1.
10. BORROW MATERIAL SHALL NOT BE TAKEN FROM WITHIN 90'
OF THE DIKE CENTERLINE UNLESS APPROVED BY THE COR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
E
F
G
H
J
K
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M
N
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SU
BM
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D B
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C H
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D B
Y:
D R
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B
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SHEET ID
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SHEET 3 OF 20
00 20' 40'
PERIMETER DIKE STATION 45+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 50+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 55+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 60+00
0 20 40 60 80 100 120 1400-20
℄ ℄3:1 2:1
18.7'
3:1 2:1
11.1'
3:1 2:1
15.5'
3:1 2:1
13.2'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
16' TOP WIDTH
EL.: 11.0'
BORROW LIMIT EL. 2' BORROW LIMIT EL. 2'
BORROW LIMIT EL. 2'
BORROW LIMIT EL. 2'
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED
ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH
CAROLINA STATE PLANE COORDINATE SYSTEM, NAD83
(NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE TO
BE EVENLY TRANSITIONED BETWEEN THE CROSS SECTION
STATIONS SHOWN.
5. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN
RAISING DIKE WHERE NO CROSS SECTIONS ARE SHOWN.
6. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED TO
BERM GRADE PRIOR TO ADDITIONAL DIKE CONSTRUCTION.
7. CONTROLLED DRAINAGE MUST BE MAINTAINED IN
ACCORDANCE WITH ALL LAWS AND REGULATIONS
THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
8. IN ANY PLACE WHERE THE REQUIRED PROFILE INSIDE THE
DIKED AREA IS BELOW EXISTING GROUND, CUTTING IS NOT
REQUIRED. COMPACT ACCORDING TO SPECIFICATIONS.
9. IN ANY PLACE WHERE THE EXISTING GROUND TO THE
EXTERIOR OF THE DIKES IS ABOVE THE REQUIRED PROFILE,
DRAINAGE MUST BE MAINTAINED. SLOPES MAY TIE IN
FLATTER THAN 3:1.
10. BORROW MATERIAL SHALL NOT BE TAKEN FROM WITHIN 90'
OF THE DIKE CENTERLINE UNLESS APPROVED BY THE COR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
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F
G
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D B
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RTA
SHEET 4 OF 20
PERIMETER DIKE STATION 33+00
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80
PLACEMENT AREA 1717 C-P
PERIMETER DIKE STATION 17+23
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80-100
SPILLWAY NO. 2
STA: 33+00 OFF:78'R
TOP EL.: 15.5
INV. OUT: 0.2
SPILLWAY NO. 1
STA: 17+23 OFF:76'R
TOP EL.: 16.5
INV. OUT: 1.0
NEW DIKE SECTION
(TYPICAL)
OUTFALL
FINGER DIKE
EL.: 11.0'
22.2'
5.5'
96' OF 30" HDPE
SLOPE: 1.00%
63' OF 30" HDPE
SLOPE: -1.00%
57' OF 30" HDPE
SLOPE: 1.50%
47' OF 30" HDPE
SLOPE: -1.60%
INV. EL.:-0.2'
INV. EL.:0.8'
INV. EL.:0.9'
INV. EL.:1.7'
34.7'
52.6'
OUTFALL
FINGER DIKE
EL.: 11.0'
3:1 2:1
3:1 2:1
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
3.0'11.0'
3.0'11.0'
NEW DIKE SECTION
(TYPICAL)
CHECKVALVE
(SEE NOTE 15,
THIS PAGE)
CHECKVALVE
(SEE NOTE 15,
THIS PAGE)
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET
BASED ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE
SOUTH CAROLINA STATE PLANE COORDINATE SYSTEM,
NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE
TO BE EVENLY TRANSITIONED BETWEEN THE CROSS
SECTION STATIONS SHOWN.
5. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED
TO BERM GRADE PRIOR TO ADDITIONAL DIKE
CONSTRUCTION.
6. RELOCATE OR CONSTRUCT PERIMETER DITCH TO THE
INSIDE AS NECESSARY TO ALLOW FOR BERM
CONSTRUCTION AND TO PROVIDE DRAINAGE FOR
INTERIOR LATERAL DITCHES THROUGHOUT
CONSTRUCTION.
7. BORROW MATERIAL SHALL NOT BE TAKEN FROM
BETWEEN THE DIKE AND THE PERIMETER DITCH UNLESS
APPROVED BY THE COR.
8. DIKE SHALL BE BUILT TO GRADE AND ACCEPTED BEFORE
BEING CUT FOR INSTALLATION OF PIPE.
9. IF UNDAMAGED, EXISTING RISER TOP SECTIONS MAY BE
REUSED (SUBJECT TO INSPECTION AND APPROVAL OF
THE COR). RISER BOTTOM SECTION SHALL BE REPLACED,
OR, AT THE CONTRACTOR'S OPTION, MAY BE REMOVED
FROM THE SITE AND SANDBLASTED, THEN INSPECTED BY
THE COR. IF SUFFICIENT METAL REMAINS AND IF
APPROVED BY THE COR, THE BOTTOM SECTION MAY BE
RECOATED AND REUSED.
10. NEW WOODEN WALKWAY SET DECK AT A TOLERANCE OF
+/-0.5. 4"X4" POST PENETRATION 4' MIN. WALKWAY DETAIL
LOCATED ON SHEET C-901.
11. 14' X 12' SPLASH PAD, CENTER ON AXIS OF PIPE:
GEOTEXTILE SECURED BY SECURING PINS 4' ON CENTER,
CRUSHED GRAVEL: 6" THICK, OVERLAIN WITH RIPRAP 2'
THICK. SEE SPECS FOR MATERIAL DETAIL.
12. 30" DIA. HDPE PIPE SECTIONS TO BE JOINED WITH BUTT
FUSION JOINTS.
13. THE NUMBER OF PIPE SUPPORTS SHALL BE DETERMINED
IN THE FIELD. MINIMUM OF 2' SOIL COVER TO NOT USE
SUPPORTS.
14. ALL EXISTING SPILLWAY PIPE SHALL BE EXCAVATED AND
REMOVED IN ITS ENTIRETY. FOR BIDDING PURPOSES,
ASSUME THAT 90% OF PIPE CAN BE REUSED.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
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SHEET 5 OF 20
00 20' 40'
15. CHECK VALVES SHALL BE PROVIDED IN ACCORDANCE
WITH DIKE CONSTRUCTION SPECIFICATION, SUBSECTION
"CHECK VALVES" AND PARAGRAPH "CHECK VALVES".
LIDAR. THIS DRAWING IS TO BE USED FOR GENERAL SITE CONDITIONS ONLY.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH CAROLINA STATE
PLANE COORDINATE SYSTEM, NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THIS SHEET INDICATES THE GENERAL REQUIREMENTS OF THE WORK. THE DIKES
AND BERMS AROUND THE PERIMETER OF THE SITE SHALL BE CONSTRUCTED AS
SHOWN ON CROSS SECTION SHEETS.
4. THE BORROW AREA IN THE PLACEMENT AREA CONSISTS OF ALL AREAS INSIDE OF
THE BERM THAT ARE AT AN ELEVATION INDICATED ON THE DRAWING OR HIGHER.
THIS WILL REQUIRE HAULING OF FILL FROM BORROW AREAS TO THE DIKE
SECTION.
5. CONTROLLED DRAINAGE MUST BE MAINTAINED IN ACCORDANCE WITH ALL LAWS
AND REGULATIONS THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
6. SILT FENCES SHALL BE USED ALONG THE OUTSIDE EXTERIOR SLOPE OF THE DIKE
CONSTRUCTION AREA IN ORDER TO CONTROL SEDIMENT FROM ENTERING THE
MARSH. NO FILL SHALL BE PLACED OR FLOW INTO THE MARSH. CONTRACTOR
SHALL PROVIDE DOUBLE ROW SILT FENCE IN ACCORDANCE WITH ALL
APPLICABLE SOUTH CAROLINA STATE REQUIREMENTS.
7. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN RAISING DIKE WHERE NO
CROSS SECTIONS ARE SHOWN.
0+00
1+00
2+00
3+00
4+00
5+00
6+00
7+00
8+00
9+00
10+00
+0
0 12 +0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
29+00
30+00
31+00
32+00
33+00
34+00
35+00
36+00
37+00
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
59+00
6 8
12 12
PLACEMENT AREA
1789 C-P
46 AC
BORROW LIMIT: EL. 7.0'
8609+00
8610+00
8611+00
8608+00
8605+00
8606+00
8607+00
8616+00
8615+00
8612+00
8613+00
8614+00
8604+00
8601+00
8602+00
8603+00
8600+00 8598+00
8599+00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
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F
G
H
J
K
L
M
N
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BM
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D B
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D B
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D R
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SHEET ID
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SHEET 6 OF 20
00 100' 200'
PLACEMENT AREA 1789 C-P WORK REQUIREMENTS
STATIONING REQUIREMENTS
PERIMETER DIKE REQUIRED TOP OF DIKE ELEVATION: 15.0'
0+00 TO 59+37 SEE CROSS SECTIONS ON C-203 & C-204
SPILLWAYS NEW 4' x 4' SPILLWAYS
2+16 & 26+75 SEE CROSS SECTIONS ON C-302
EXISTING SPILLWAY
STA. 26+75
TO BE REPLACED
EXISTING SPILLWAY
STA. 2+16
TO BE REPLACED
8. THE SITE WAS LAST PUMPED INTO IN JANUARY 2019 AND HAS BEEN PASSIVELY
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 5+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 10+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 15+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 20+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 25+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 30+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 35+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 40+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 0+50
0 20 40 60 80 100 120 1400-20
3:1 2:1
11.7'
3:1 2:1
3.3'
3:1 2:1
10.2'
3:1 2:1
11.5'
3:1 2:1
15.9'
3:1 2:1
12.2'
3:1 2:1
5.1'
3:1 2:1
5.8'
3:1 2:1
4.9'
16' TOP WIDTH
EL.: 15.0'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
BORROW LIMIT EL. 7'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED
ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH
CAROLINA STATE PLANE COORDINATE SYSTEM, NAD83
(NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE TO
BE EVENLY TRANSITIONED BETWEEN THE CROSS SECTION
STATIONS SHOWN.
5. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN
RAISING DIKE WHERE NO CROSS SECTIONS ARE SHOWN.
6. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED TO
BERM GRADE PRIOR TO ADDITIONAL DIKE CONSTRUCTION.
7. CONTROLLED DRAINAGE MUST BE MAINTAINED IN
ACCORDANCE WITH ALL LAWS AND REGULATIONS
THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
8. IN ANY PLACE WHERE THE REQUIRED PROFILE INSIDE THE
DIKED AREA IS BELOW EXISTING GROUND, CUTTING IS NOT
REQUIRED. COMPACT ACCORDING TO SPECIFICATIONS.
9. IN ANY PLACE WHERE THE EXISTING GROUND TO THE
EXTERIOR OF THE DIKES IS ABOVE THE REQUIRED PROFILE,
DRAINAGE MUST BE MAINTAINED. SLOPES MAY TIE IN
FLATTER THAN 3:1.
10. BORROW MATERIAL SHALL NOT BE TAKEN FROM WITHIN 90'
OF THE DIKE CENTERLINE UNLESS APPROVED BY THE COR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
E
F
G
H
J
K
L
M
N
P
SU
BM
IT
TE
D B
Y:
C H
EC
KE
D B
Y:
D R
AW
N
B Y:
D
ES
IG
N
ED
B
Y:
FI
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AM
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D
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IG
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F
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SU
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AT
E:
SI
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M
AR
K
D
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C R
IP
TI
O N
D
AT
E
SHEET ID
O
C T
1" =2
0'
JJ
K
M C
M C
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R . J
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C O
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L
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SHEET 7 OF 20
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 50+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 55+00
0 20 40 60 80 100 120 1400-20
3:1 2:1
0.4'
3:1 2:1
8.8'
3:1 2:1
13.6'
BORROW LIMIT EL. 7' BORROW LIMIT EL. 7' BORROW LIMIT EL. 7'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
16' TOP WIDTH
EL.: 15.0'
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED
ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH
CAROLINA STATE PLANE COORDINATE SYSTEM, NAD83
(NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE TO
BE EVENLY TRANSITIONED BETWEEN THE CROSS SECTION
STATIONS SHOWN.
5. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN
RAISING DIKE WHERE NO CROSS SECTIONS ARE SHOWN.
6. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED TO
BERM GRADE PRIOR TO ADDITIONAL DIKE CONSTRUCTION.
7. CONTROLLED DRAINAGE MUST BE MAINTAINED IN
ACCORDANCE WITH ALL LAWS AND REGULATIONS
THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
8. IN ANY PLACE WHERE THE REQUIRED PROFILE INSIDE THE
DIKED AREA IS BELOW EXISTING GROUND, CUTTING IS NOT
REQUIRED. COMPACT ACCORDING TO SPECIFICATIONS.
9. IN ANY PLACE WHERE THE EXISTING GROUND TO THE
EXTERIOR OF THE DIKES IS ABOVE THE REQUIRED PROFILE,
DRAINAGE MUST BE MAINTAINED. SLOPES MAY TIE IN
FLATTER THAN 3:1.
10. BORROW MATERIAL SHALL NOT BE TAKEN FROM WITHIN 90'
OF THE DIKE CENTERLINE UNLESS APPROVED BY THE COR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
E
F
G
H
J
K
L
M
N
P
SU
BM
IT
TE
D B
Y:
C H
EC
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D B
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D R
AW
N
B Y:
D
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IG
N
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B
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FI
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AM
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D
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1" =2
0'
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RTA
SHEET 8 OF 20
PERIMETER DIKE STATION 2+16
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80-100-120
PLACEMENT AREA 1789 C-P
PERIMETER DIKE STATION 26+75
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80-100
SPILLWAY NO. 4
STA: 26+75 OFF:83'R
TOP EL.: 22.5
INV. OUT: 7.0
9.5'
1.4'
71' OF 30" HDPE
SLOPE: -0.50%
INV. EL.:6.0' INV. EL.:7.4'
INV. EL.:4.7'
INV. EL.:6.4'
57.3'
57.4'
OUTFALL
FINGER DIKE
EL.: 15.0'
OUTFALL
FINGER DIKE
EL.: 15.0'
3:1
3:1
2:1
2:1
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
3.0'11.0'
3.0'11.0'
89' OF 30" HDPE
SLOPE: 1.50%
114' OF 30" HDPE
SLOPE: 1.50%
71' OF 30" HDPE
SLOPE: -0.57%
SPILLWAY NO. 3
STA: 2+16 OFF:91'R
TOP EL.: 21.5
INV. OUT: 6.0
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET
BASED ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE
SOUTH CAROLINA STATE PLANE COORDINATE SYSTEM,
NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE
TO BE EVENLY TRANSITIONED BETWEEN THE CROSS
SECTION STATIONS SHOWN.
5. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED
TO BERM GRADE PRIOR TO ADDITIONAL DIKE
CONSTRUCTION.
6. RELOCATE OR CONSTRUCT PERIMETER DITCH TO THE
INSIDE AS NECESSARY TO ALLOW FOR BERM
CONSTRUCTION AND TO PROVIDE DRAINAGE FOR
INTERIOR LATERAL DITCHES THROUGHOUT
CONSTRUCTION.
7. BORROW MATERIAL SHALL NOT BE TAKEN FROM
BETWEEN THE DIKE AND THE PERIMETER DITCH UNLESS
APPROVED BY THE COR.
8. DIKE SHALL BE BUILT TO GRADE AND ACCEPTED BEFORE
BEING CUT FOR INSTALLATION OF PIPE.
9. IF UNDAMAGED, EXISTING RISER TOP SECTIONS MAY BE
REUSED (SUBJECT TO INSPECTION AND APPROVAL OF
THE COR). RISER BOTTOM SECTION SHALL BE REPLACED,
OR, AT THE CONTRACTOR'S OPTION, MAY BE REMOVED
FROM THE SITE AND SANDBLASTED, THEN INSPECTED BY
THE COR. IF SUFFICIENT METAL REMAINS AND IF
APPROVED BY THE COR, THE BOTTOM SECTION MAY BE
RECOATED AND REUSED.
10. NEW WOODEN WALKWAY SET DECK AT A TOLERANCE OF
+/-0.5. 4"X4" POST PENETRATION 4' MIN. WALKWAY DETAIL
LOCATED ON SHEET C-901.
11. 14' X 12' SPLASH PAD, CENTER ON AXIS OF PIPE:
GEOTEXTILE SECURED BY SECURING PINS 4' ON CENTER,
CRUSHED GRAVEL: 6" THICK, OVERLAIN WITH RIPRAP 2'
THICK. SEE SPECS FOR MATERIAL DETAIL.
12. 30" DIA. HDPE PIPE SECTIONS TO BE JOINED WITH BUTT
FUSION JOINTS.
13. THE NUMBER OF PIPE SUPPORTS SHALL BE DETERMINED
IN THE FIELD. MINIMUM OF 2' SOIL COVER TO NOT USE
SUPPORTS.
14. ALL EXISTING SPILLWAY PIPE SHALL BE EXCAVATED AND
REMOVED IN ITS ENTIRETY. FOR BIDDING PURPOSES,
ASSUME THAT 90% OF PIPE CAN BE REUSED.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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SHEET 9 OF 20
LIDAR. THIS DRAWING IS TO BE USED FOR GENERAL SITE CONDITIONS ONLY.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH CAROLINA STATE
PLANE COORDINATE SYSTEM, NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THIS SHEET INDICATES THE GENERAL REQUIREMENTS OF THE WORK. THE DIKES
AND BERMS AROUND THE PERIMETER OF THE SITE SHALL BE CONSTRUCTED AS
SHOWN ON CROSS SECTION SHEETS.
4. THE BORROW AREA IN THE PLACEMENT AREA CONSISTS OF ALL AREAS INSIDE OF
THE BERM THAT ARE AT AN ELEVATION INDICATED ON THE DRAWING OR HIGHER.
THIS WILL REQUIRE HAULING OF FILL FROM BORROW AREAS TO THE DIKE
SECTION.
5. CONTROLLED DRAINAGE MUST BE MAINTAINED IN ACCORDANCE WITH ALL LAWS
AND REGULATIONS THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
6. SILT FENCES SHALL BE USED ALONG THE OUTSIDE EXTERIOR SLOPE OF THE DIKE
CONSTRUCTION AREA IN ORDER TO CONTROL SEDIMENT FROM ENTERING THE
MARSH. NO FILL SHALL BE PLACED OR FLOW INTO THE MARSH. CONTRACTOR
SHALL PROVIDE DOUBLE ROW SILT FENCE IN ACCORDANCE WITH ALL
APPLICABLE SOUTH CAROLINA STATE REQUIREMENTS.
7. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN RAISING DIKE WHERE NO
CROSS SECTIONS ARE SHOWN.
0+ 00 1+
00 2+ 00 3+
00 4+ 00 5+
00 6+ 00 7+
00 8+ 00 9+
00 10 +0
+0
+0
+0
+0
+0
+0
+0
+0
19+00
20+00
21+00
22+00
23+00
24+00
25+00
26+00
27+00
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
48+00
49+00
50+00
51+00
52+00
53+00
54+00
55+00
56+00
57+00
PLACEMENT AREA
1835 C-P
39 AC
BORROW LIMIT: EL. 10.0'
8646+00
8647+00
8648+00
8668+00
8669+00
8670+00
8667+00
8664+00
8665+00
8666+00
8663+00
8653+00
8654+00
8655+00
8652+00
8649+00
8650+00
8651+00
8660+00
8661+00
8662+00
8659+00
8656+00
8657+00
8658+00
8645+01
8670+07
8668+17
8666+28
8673+96
8675+91
8677+86
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
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F
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D B
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D R
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SHEET 10 OF 20
00 100' 200'
PLACEMENT AREA 1835 C-P WORK REQUIREMENTS
STATIONING REQUIREMENTS
PERIMETER DIKE REQUIRED TOP OF DIKE ELEVATION: 21.0'
0+00 TO 57+42 SEE CROSS SECTIONS ON C-205 & C-206
SPILLWAYS NEW 4' x 4' SPILLWAYS
15+95, 48+55, & 51+85 SEE CROSS SECTIONS ON C-303
EXISTING SPILLWAY
STA. 15+95
TO BE REPLACED
EXISTING SPILLWAY
STA. 51+85
TO BE REPLACED
EXISTING SPILLWAY
STA. 48+55
TO BE REPLACED
8. THE SITE WAS LAST PUMPED INTO IN JUNE 2023 AND HAS BEEN PASSIVELY
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 0+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 5+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 10+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 15+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 20+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 25+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 30+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 35+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 40+00
0 20 40 60 80 100 120 1400-20
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
16.3'
3:1
2:1
2:1
40' BERM
SLOPE=2.5%
16.5'
3:1
2:1
2:1
40' BERM
SLOPE=2.5%
12.0'
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
13.5'
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
7.6'
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
20.0'
3:1
2:1
2:1
40' BERM
SLOPE=2.5%
15.2'
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
13.6'
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
17.8'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
BORROW LIMIT EL. 10'
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED
ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH
CAROLINA STATE PLANE COORDINATE SYSTEM, NAD83
(NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE TO
BE EVENLY TRANSITIONED BETWEEN THE CROSS SECTION
STATIONS SHOWN.
5. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN
RAISING DIKE WHERE NO CROSS SECTIONS ARE SHOWN.
6. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED TO
BERM GRADE PRIOR TO ADDITIONAL DIKE CONSTRUCTION.
7. CONTROLLED DRAINAGE MUST BE MAINTAINED IN
ACCORDANCE WITH ALL LAWS AND REGULATIONS
THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
8. IN ANY PLACE WHERE THE REQUIRED PROFILE INSIDE THE
DIKED AREA IS BELOW EXISTING GROUND, CUTTING IS NOT
REQUIRED. COMPACT ACCORDING TO SPECIFICATIONS.
9. IN ANY PLACE WHERE THE EXISTING GROUND TO THE
EXTERIOR OF THE DIKES IS ABOVE THE REQUIRED PROFILE,
DRAINAGE MUST BE MAINTAINED. SLOPES MAY TIE IN
FLATTER THAN 3:1.
10. BORROW MATERIAL SHALL NOT BE TAKEN FROM WITHIN 90'
OF THE DIKE CENTERLINE UNLESS APPROVED BY THE COR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
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F
G
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K
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D B
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C H
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D B
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SHEET 11 OF 20
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 50+00
0 20 40 60 80 100 120 1400-20
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 55+00
0 20 40 60 80 100 120 1400-20
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
14.6'
3:1
2:1
2:1
40' BERM
SLOPE=2.5%
17.3'
3:1 2:1
2:1
40' BERM
SLOPE=2.5%
12.9'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
16' TOP WIDTH
EL.: 21.0'
BORROW LIMIT EL. 10' BORROW LIMIT EL. 10' BORROW LIMIT EL. 10'
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET BASED
ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH
CAROLINA STATE PLANE COORDINATE SYSTEM, NAD83
(NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE TO
BE EVENLY TRANSITIONED BETWEEN THE CROSS SECTION
STATIONS SHOWN.
5. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN
RAISING DIKE WHERE NO CROSS SECTIONS ARE SHOWN.
6. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED TO
BERM GRADE PRIOR TO ADDITIONAL DIKE CONSTRUCTION.
7. CONTROLLED DRAINAGE MUST BE MAINTAINED IN
ACCORDANCE WITH ALL LAWS AND REGULATIONS
THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
8. IN ANY PLACE WHERE THE REQUIRED PROFILE INSIDE THE
DIKED AREA IS BELOW EXISTING GROUND, CUTTING IS NOT
REQUIRED. COMPACT ACCORDING TO SPECIFICATIONS.
9. IN ANY PLACE WHERE THE EXISTING GROUND TO THE
EXTERIOR OF THE DIKES IS ABOVE THE REQUIRED PROFILE,
DRAINAGE MUST BE MAINTAINED. SLOPES MAY TIE IN
FLATTER THAN 3:1.
10. BORROW MATERIAL SHALL NOT BE TAKEN FROM WITHIN 90'
OF THE DIKE CENTERLINE UNLESS APPROVED BY THE COR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
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F
G
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K
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D B
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SHEET 12 OF 20
PERIMETER DIKE STATION 48+55
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 51+85
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140
PLACEMENT AREA 1835 C-P
PERIMETER DIKE STATION 15+95
-20
-10
-20
0 20 40 60 80 100 120 1400-20-40-60-80-100-120-140
SPILLWAY NO. 5
STA: 15+95 OFF:83'R
TOP EL.: 25.0
INV. OUT: 9.5
SPILLWAY NO. 6
STA: 48+55 OFF:88'R
TOP EL.: 24.5
INV. OUT: 9.0
SPILLWAY NO. 7
STA: 51+85 OFF:85'R
TOP EL.: 24.5
INV. OUT: 9.0
10.7'
13.1'
9.8'
73' OF 30" HDPE
SLOPE: 1.50%
71' OF 30" HDPE
SLOPE: -0.50%
74' OF 30" HDPE
SLOPE: -0.50%
76' OF 30" HDPE
SLOPE: -0.50%
INV. EL.:8.8'
INV. EL.:9.9'
INV. EL.:5.6'
INV. EL.:9.4'
INV. EL.:5.9' INV. EL.:9.4'
51.9'
52.8'
62.9'
OUTFALL
FINGER DIKE
EL.: 21.0'
OUTFALL
FINGER DIKE
EL.: 21.0'
OUTFALL
FINGER DIKE
EL.: 21.0'
3:1
3:1
3:1
2:1
2:1
2:1
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
3.0'11.0'
3.0'11.0'
3.0'11.0'
SPLASHPAD
(SEE NOTE 11,
THIS PAGE)
115' OF 30" HDPE
SLOPE: 3.00%
126' OF 30" HDPE
SLOPE: 3.00%
NOTES:
1. ALL ELEVATIONS ARE NAVD88 INTERNATIONAL FEET
BASED ON FEBRUARY 2024 LIDAR.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE
SOUTH CAROLINA STATE PLANE COORDINATE SYSTEM,
NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THE HORIZONTAL REFERENCE IS A RELATIVE VALUE TIED
TO THE EXISTING DIKE CENTERLINE, IE. OFFSET "0".
4. DIFFERENCES IN CENTERLINE OFFSET DISTANCES ARE
TO BE EVENLY TRANSITIONED BETWEEN THE CROSS
SECTION STATIONS SHOWN.
5. FULL WIDTH OF DIKE AND BERM MUST BE CONSTRUCTED
TO BERM GRADE PRIOR TO ADDITIONAL DIKE
CONSTRUCTION.
6. RELOCATE OR CONSTRUCT PERIMETER DITCH TO THE
INSIDE AS NECESSARY TO ALLOW FOR BERM
CONSTRUCTION AND TO PROVIDE DRAINAGE FOR
INTERIOR LATERAL DITCHES THROUGHOUT
CONSTRUCTION.
7. BORROW MATERIAL SHALL NOT BE TAKEN FROM
BETWEEN THE DIKE AND THE PERIMETER DITCH UNLESS
APPROVED BY THE COR.
8. DIKE SHALL BE BUILT TO GRADE AND ACCEPTED BEFORE
BEING CUT FOR INSTALLATION OF PIPE.
9. IF UNDAMAGED, EXISTING RISER TOP SECTIONS MAY BE
REUSED (SUBJECT TO INSPECTION AND APPROVAL OF
THE COR). RISER BOTTOM SECTION SHALL BE REPLACED,
OR, AT THE CONTRACTOR'S OPTION, MAY BE REMOVED
FROM THE SITE AND SANDBLASTED, THEN INSPECTED BY
THE COR. IF SUFFICIENT METAL REMAINS AND IF
APPROVED BY THE COR, THE BOTTOM SECTION MAY BE
RECOATED AND REUSED.
10. NEW WOODEN WALKWAY SET DECK AT A TOLERANCE OF
+/-0.5. 4"X4" POST PENETRATION 4' MIN. WALKWAY DETAIL
LOCATED ON SHEET C-901.
11. 14' X 12' SPLASH PAD, CENTER ON AXIS OF PIPE:
GEOTEXTILE SECURED BY SECURING PINS 4' ON CENTER,
CRUSHED GRAVEL: 6" THICK, OVERLAIN WITH RIPRAP 2'
THICK. SEE SPECS FOR MATERIAL DETAIL.
12. 30" DIA. HDPE PIPE SECTIONS TO BE JOINED WITH BUTT
FUSION JOINTS.
13. THE NUMBER OF PIPE SUPPORTS SHALL BE DETERMINED
IN THE FIELD. MINIMUM OF 2' SOIL COVER TO NOT USE
SUPPORTS.
14. ALL EXISTING SPILLWAY PIPE SHALL BE EXCAVATED AND
REMOVED IN ITS ENTIRETY. FOR BIDDING PURPOSES,
ASSUME THAT 90% OF PIPE CAN BE REUSED.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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SHEET 13 OF 20
LIDAR. THIS DRAWING IS TO BE USED FOR GENERAL SITE CONDITIONS ONLY.
2. ALL HORIZONTAL COORDINATES ARE BASED ON THE SOUTH CAROLINA STATE
PLANE COORDINATE SYSTEM, NAD83 (NSRS2007), INTERNATIONAL FEET.
3. THIS SHEET INDICATES THE GENERAL REQUIREMENTS OF THE WORK. THE DIKES
AND BERMS AROUND THE PERIMETER OF THE SITE SHALL BE CONSTRUCTED AS
SHOWN ON CROSS SECTION SHEETS.
4. THE BORROW AREA IN THE PLACEMENT AREA CONSISTS OF ALL AREAS INSIDE OF
THE BERM THAT ARE AT AN ELEVATION INDICATED ON THE DRAWING OR HIGHER.
THIS WILL REQUIRE HAULING OF FILL FROM BORROW AREAS TO THE DIKE
SECTION.
5. CONTROLLED DRAINAGE MUST BE MAINTAINED IN ACCORDANCE WITH ALL LAWS
AND REGULATIONS THROUGHOUT CONSTRUCTION. DITCHES MAY BE CUT, AS
NECESSARY, TO ACHIEVE DRAINAGE.
6. SILT FENCES SHALL BE USED ALONG THE OUTSIDE EXTERIOR SLOPE OF THE DIKE
CONSTRUCTION AREA IN ORDER TO CONTROL SEDIMENT FROM ENTERING THE
MARSH. NO FILL SHALL BE PLACED OR FLOW INTO THE MARSH. CONTRACTOR
SHALL PROVIDE DOUBLE ROW SILT FENCE IN ACCORDANCE WITH ALL
APPLICABLE SOUTH CAROLINA STATE REQUIREMENTS.
7. FOLLOW THE EXISTING CENTERLINE CURVATURE WHEN RAISING DIKE WHERE NO
CROSS SECTIONS ARE SHOWN.
0+00
1+00
2+00
3+00
4+00
5+00
6+00
7+00
8+00
9+00
+0
+0
+0
13+00
14+00
15+00
16+00
17+00
18+00
19+00
20+00
10 10
8 12
PLACEMENT AREA
2237 C-P
6 AC
BORROW LIMIT: EL. 8.0'
9038+06
9042+53
9040+52
+5
9055+59
+0
+0
+0
+0
+0
+0
+0
+00
+00
+00
9039+00
9040+00
9041+00
9042+00
9043+00
9044+00
9045+00
9046+00
9047+00
9048+00
9049+00
9050+00
9051+00
9052+00
9053+00
9054+00
9055+00
9056+00
9057+00
9058+009059+00
9060+00
9061+00
9063+00
9064+00
9065+00
9066+00
9067+00
9068+00
9069+00
9070+00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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SHEET 14 OF 20
00 100' 200'
PLACEMENT AREA 2237 C-P WORK REQUIREMENTS
STAT…
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