A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans_unlocked (1).pdf

PDF 4 MB Posted Jun 27, 2022

Attached to: Maintenance Dredging at Wilmington Harbor Inner Ocean Bar
Solicitation number: W912PM22B0020
Issued by: Department of the Army Corps of Engineers Engineering District Wilmington

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Written by GovTribe AI · Dec 28, 2023

This solicitation provides details for a maintenance dredging contract opportunity at Wilmington Harbor Inner Ocean Bar in North Carolina. The U.S. Army Corps of Engineers, Wilmington District requires dredging of Bald Head Shoal Channels 1 and 2, estimated at 1,000,000 cubic yards, to be removed by cutterhead dredge and disposed on nearby beaches from November 16 to April 30. The contract will be firm fixed price, between $10-25 million, issued electronically on or around June 30 with bid opening to follow. Interested parties should register with SAM and monitor the website for amendments. The NAICS code is 237990 and size standard is $30 million. Inquiries may be directed to the Corps contacts listed.

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File	Type	Posted
B1 - Bid Abstract with Formulas_Signed.pdf	PDF	Jul 27, 2022
Sign-in Sheet.pdf	PDF	Jul 27, 2022
A21 - W912PM22B0020 Amendment 0001 CCopy.docx.pdf	PDF	Jul 14, 2022
A21 - W912PM22B0020 Amendment 0001 with Revised Specifications.docx.pdf	PDF	Jul 14, 2022
Boring_Data.zip	ZIP file	Jul 11, 2022
wil_bh2_2022-02-08CS_SWART_all.txt	TXT text file	Jul 1, 2022
wil_smith_island_20220429_cs_all.txt	TXT text file	Jul 1, 2022
BHI_2021-11_Profiles.txt	TXT text file	Jul 1, 2022
A21 -RTA-SPECS2-FY23WHIOB_6-28-22.pdf	PDF	Jun 28, 2022
A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans_unlocked_6-28-22.pdf	PDF	Jun 28, 2022
A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans_6-28-22.pdf	PDF	Jun 28, 2022
A21 - RTA-SPECS2-FY23WHIOB.pdf	PDF	Jun 27, 2022
A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans.pdf	PDF	Jun 27, 2022
A21 - W912PM22B0020.pdf	PDF	Jun 27, 2022

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SCALE IN FEET

4000 2000 2000 4000 6000

SCALE: 1" = 2000'

PROJECT SITE PLAN

C a p e

F r

R i v r

N t l n t i c

O c n

HYDE

BEAUFORT

PITT

EDGECOMBE

WASHINGTON

TYRREL

DARE

PAMLICO

CRAVEN

JONES

ONSLOW

DUPLIN

PENDER

DURHAM

HALIFAX

NORTHAMPTON

HERTFORD

GATES

WILSON

CUMBERLAND

CARTERET

MARTIN

BERTIE

PAMLICO SOUND

ATLANTIC O

CEAN

GREENE

LENOIR

V I R G I N I A

S O U T H C A R O L I N A

Wilmington

Manteo

Elizabeth City

Cape Hatteras

Cape Lookout

Cape Fear

Rodanthe

Morehead

City

Not To Scale

BRUNSWICK PROJECT VICINITY

MAP

NOTES

1. UNDERWATER ELECTRICAL DISTRIBUTION CABLES AND A WATER SUPPLY LINE EXTEND FROM THE EAST END

OF OAK ISLAND TO BALD HEAD ISLAND. SEE REFERENCE DRAWINGS R-1 THRU R-6 FOR AS-BUILTS. THE CONTRACTOR

SHALL AVOID ANY BOTTOM DISTURBING ACTIVITIES (ANCHORS, SPUDDING, ETC.) NEAR THE ELECTRICAL DISTRIBUTION

CABLES AND WATER SUPPLY LINE.

2. NO VESSEL ANCHORAGE OR PLACEMENT OF SPUDS, PIPELINE OR OTHER EQUIPMENT WILL BE ALLOWED WITHIN THE

ARCHAEOLOGICAL RESTRICTED AREA. COORDINATES OF THE ARCHAEOLOGICAL RESTRICTED AREA WILL BE PROVIDED

TO THE CONTRACTOR AFTER CONTRACT AWARD.

3. PHOTOGRAPHY DATE:OCTOBER 2021.

S M

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L A

N N

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I S

FORT

CASWELL

ARCHAEOLOGICAL RESTRICTED AREA

SEE NOTE 2

APPROX. LOCATION OF UNDERWATER

ELECTRICAL DISTRIBUTION CABLES

AND WATER SUPPLY LINE, SEE NOTE 1

BALDHEAD SHOAL CHANNEL REACH 2

SEE SHEET CN102

APPROXIMATE BEACH

PLACEMENT AREAS

SEE SHEETS CN103 - CN106

SMITH ISLAND CHANNEL

SEE SHEET CN101

PROJECT

SHEET Title

R-1

R-2

R-3

R-4

R-5

R-6

R-7

R-8

R-9

INDEX OF DRAWINGS

REFERENCE DRAWINGS - CABLE ROUTE & WATERLINE EXTENSION - AS BUILTS

AS-BUILT CABLE ROUTE INDEX, NOTES & LEGEND

AS-BUILT CABLE LOCATION STA. 57+00 TO STA. 85+58

INDEX SHEET - GENERAL NOTES

PLAN AND PROFILE STA. 0+00 TO STA. 28+00

PLAN AND PROFILE STA. 28+00 TO STA. 57+00

PLAN AND PROFILE STA. 57+00 TO STA. 85+58

REFERENCE DRAWINGS - BEACH AND GROIN FIELD CONDITION

BEACH AND GROIN FIELD CONDITION - APRIL 2018

SECTION AND DETAILS

AS-BUILT SAND TUBE GROIN LOCATIONS

G001

GI001

CN101

CN102

CN103

CN104

CN105

CB106

CN501

COVER SHEET

INDEX OF DRAWINGS, PROJECT VICINITY & LOCATION MAPS

SMITH ISLAND CHANNEL

BALDHEAD SHOAL CHANNEL - REACH 2

PLAN VIEW SOUTH BEACH PLACEMENT AREA

SECTION VIEWS SOUTH BEACH

SOUTH BEACH TYPICAL SECTIONS - BEACH DISPOSAL AREA

GI001

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AutoCAD SHX Text N

AutoCAD SHX Text

ROANOKE

AutoCAD SHX Text

RIVER

AutoCAD SHX Text

RIVER

AutoCAD SHX Text

CHOWAN

AutoCAD SHX Text

CAPE

AutoCAD SHX Text

FEAR

AutoCAD SHX Text

RIVER

N: 46536.8

E: 2300697.8

SMITH ISLAND CHANNEL

"13A"

' W

A B

L E

E A

S E

E N

BALD HEAD ISLAND

SHORELINE - JULY 2016

PROGRESS ENGERGY CABLE

LOCATED BY ARC SURVEYING AND MAPPING, INC.

JACKSONVILLE, FL

CHANNEL PRISM LINE

(TYP.)

6" HDPE WATER SUPPLY LINE

TO BALD HEAD ISLAND

OWNED BY VILLAGE OF BALD HEAD

PROGRESS ENERGY CABLE

LOCATED BY ARC SURVEYING & MAPPING, INC.

JACKSONVILLE, FL.

SUBMARINE CABLES

(INACTIVE)

BALDHEAD SHOAL CHANNEL

(REACH 1)

BALDHEAD CASWELL

CHANNEL

COLREGS LINE

N: 51472.6

E: 2301429.0

N: 47346.9

E: 2300873.1

N: 46598.4

E: 2300423.0

N: 47935.4

E: 2301263.6

N: 51433.3

E: 2301721.2

CENTERLINE OFFSET

CENTERLINE

CENTERLINE OFFSET

7 -

-4

UTILITY CROSSINGS NOTES:

SOUNDING

NAVIGATION AIDS

DESCRIPTION EASTING NORTHING

PROGRESS ENERGY INSTALLED TWO NEW UNDERWATER ELECTRICAL DISTRIBUTION (3-C ARMOR SHEATH)

CABLES ALONG THE CENTERLINE OF THE INDICATED CABLE ROUTE DURING 2001. PROGRESS ENERGY

MERGED WITH DUKE ENERGY IN APRIL 2012 AND IS NOW KNOWN AS DUKE ENERGY PROGRESS. THE CABLE

BEGINS AT A POINT LOCATED ON FORT CASWELL, CROSSES THE SMITH ISLAND CHANNEL, AND TERMINATES

AT A POINT LOCATED ON BALD HEAD ISLAND. THE NEW CABLE WAS LAID TO A DEPTH OF 6 FEET BELOW THE

BOTTOM ON THE LAND PORTION AND TO A DEPTH OF 10 FEET BELOW THE EXISTING CHANNEL BOTTOM. THE

CONTRACTOR SHALL LOCATE THE EXISTING CABLES PRIOR TO THE START OF ANY DREDGING OPERATIONS

AND SHALL AVOID ANY BOTTOM DISTURBING ACTIVITIES (ANCHORS, SPUDDING, ETC.) NEAR THAT LOCATION.

SEE REFERENCE DRAWINGS R-1 & R-2 FOR AS-BUILTS.

THE VILLAGE OF BALD HEAD INSTALLED A NEW 8" HDPE WATER SUPPLY LINE TO BALD HEAD ISLAND AT THE

SAME TIME AS THE NEW ELECTRICAL DISTRIBUTION CABLES. THE WATERLINE WAS INSTALLED WITHIN THE

SAME BORE TRENCH UNDERNEATH SMITH ISLAND CHANNEL AS THE ELECTRICAL DISTRIBUTION CABLES.

THE CONTRACTOR SHALL LOCATE THE WATERLINE PRIOR TO THE START OF ANY DREDGING OPERATIONS

AND SHALL AVOID ANY BOTTOM DISTURBING ACTIVITIES (ANCHORS, SPUDDING, ETC.) NEAR THAT LOCATION..

SEE REFERENCE DRAWING R-3 THRU R-6 FOR AS-BUILTS.

S M

I T

I S

L A

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CN101

LEGEND

AREA TO BE DREDGED

-44 CONTOUR

SOUNDINGS ARE EXPRESSED IN FEET AND TENTHS AND REFER TO NOAA'S REPORTED

MEAN LOWER LOW WATER (MLLW) RELATIVE TO THE 1983-2001 TIDAL EPOCH.

PROJECT SURVEYED 29 APRIL 2022 WITH DISTRICT SURVEY VESSEL "SWART"

USING RTK GPS HORIZONTAL POSITIONING EQUIPMENT AND 200 KHZ SOUNDING EQUIPMENT.

TIDE GAGE LOCATED AT: SOUTHPORT

HORIZONTAL DATUM NAD 1983, VERTICAL DATUM MLLW.

THE INFORMATION DEPICTED ON THIS MAP REPRESENTS THE RESULT OF SURVEYS

MADE ON THE DATES INDICATED AND CAN ONLY BE CONSIDERED AS INDICATING THE

GENERAL CONDITIONS EXISTING AT THAT TIME.

NAVIGATION AIDS LOCATED BY SURVEY VESSEL, ACCURACY +/- 3 METERS.

FOR LOCATION, DETAILS AND NOTES OF BEACH PLACEMENT AREAS SEE SHEETS GI01,

CN103 THRU CN106.

NOTES

M.L.L.W

44'

(TYP)

VARIES

DREDGING TOE

LINE (TYP)

2' ALLOWABLE

OVERDEPTH

TYPICAL DREDGING SECTION

NOT TO SCALE

GN. LT. BUOY 13A 2301090.19 49054.25

Feet

0 200 400

HORIZONTAL SCALE 1"=200'

C N

S m i t h I s l a n d d w g

C O

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R A

D E

S I G

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-44.8

N: 39419.8

E: 2295580.0

BALDHEAD SHOAL

CHANNEL (REACH 3)

BALDHEAD SHOAL

CHANNEL (REACH 1)

N: 41868.2

E: 2296873.0

N: 41782.4

E: 2297336.7

N: 42953.4

E: 2297955.1

N: 42916.0

E: 2298224.1

N: 39169.2

E: 2296239.4

CENTERLINE OFFSET

DESCRIPTION EASTING NORTHING

LEGEND

SOUNDINGS

NAVIGATION AIDS

M.L.L.W.

2' ALLOWABLE

OVERDEPTH

DEPTHREQUIRED

(TYP)

VARIES

TYPICAL DREDGING SECTION

NOT TO SCALE

CN102

NOTES

AREA TO BE DREDGED

DREDGING TOE

LINE (TYP)

SOUNDINGS ARE EXPRESSED IN FEET AND TENTHS AND REFER TO NOAA'S REPORTED

MEAN LOWER LOW WATER (MLLW) RELATIVE TO THE 1983-2001 TIDAL EPOCH.

PROJECT SURVEYED 08 FEBRUARY 2022 WITH DISTRICT SURVEY

VESSEL "SWART", USING RTK GPS HORIZONTAL POSITIONING EQUIPMENT

AND 200 KHZ SOUNDING EQUIPMENT

TIDE GAGE LOCATED AT: SOUTHPORT

HORIZONTAL DATUM NAD 1983. VERTICAL DATUM MLLW.

THE INFORMATION DEPICTED ON THIS MAP REPRESENTS THE RESULT OF SURVEYS

MADE ON THE DATE INDICATED AND CAN ONLY BE CONSIDERED AS INDICATING THE

GENERAL CONDITIONS EXISTING AT THAT TIME.

NAVIGATION AIDS LOCATED BY SURVEY VESSEL, ACCURACY +/- 3 METERS.

FOR LOCATION, DETAILS AND NOTES OF BEACH PLACEMENT AREAS SEE SHEETS GI01,

CN103 THRU CN106.

B A

L D

H E

N N

E L

R E

A C

Feet

0 200 400

HORIZONTAL SCALE 1"=200'

-44 CONTOUR

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"ltb11" 2297403.52 42931.18

"ltb9" 2295506.43 39491.91

"ltb10" 2296568.87 39015.06

"ltb12" 2298443.72 42991.84

C N

B a l d h e a d S h o a l R e a c h d w g

-42.6

P I

APPROX. TOE OF DUNE

-2

-4

-6

-8

APPROX. GROIN LOCATIONS

BEGIN BEACH PLACEMENT - STA. 54+00

TRANSITION 200' TO FULL BERM WIDTH

BEGIN FULL BERM WIDTH - STA. 56+00

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T I S

T A

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B A

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H E

L A

C E

M E

I E

CN103

400'0 200'

GENERAL NOTES:

1. THE WIDTH OF THE BERM WILL DEPEND ON THE FORESHORE SLOPE DURING PLACEMENT AND THE REQUIRED VOLUME TO BE PLACED BETWEEN BASELINE STATIONS. PROFILE

SURVEYS OF THE IN-PLACE FILL WILL BE USED TO ASSURE THAT THE MATERIAL IS DISTRIBUTED ALONG THE PROJECT SHORELINE. THE BEACH PLACEMENT LIMITS SHOWN ON THE

DRAWINGS ARE BASED ON THE NOVEMBER 2021 ONSHORE AND OFFSHORE SURVEYS OBTAINED BY THE VILLAGE OF BALDHEAD ISLAND.

2. THE BERM SLOPE IS DEPENDENT UPON MATERIAL PROPERTIES AND WAVE ENVIRONMENT DURING PLACEMENT.

3. GENERAL LOCATIONS OF THE GEOTUBE GROINS INSTALLED ALONG SOUTH BEACH IN 2019 ARE SHOWN ON THE PLANS. THE GEOTUBE GROINSWERE CONSTRUCTED WITH A

GEOTEXTILE FABRIC AND FILLED WITH SAND. THE GEOTUBE GROINS ARE APPROX. 10' WIDE BY 6' HIGH AT THE LANDWARD END AND APPROX. 7' WIDE BY 4' HIGH AT THE SEAWARD

END. LENGTH VARIES FROM 200' TO 350'. BEFORE ANY BEACH FILLING OPERATIONS BEGIN ON BALDHEAD ISLAND, THE CONTRACTOR SHALL FIELD LOCATE EACH GROIN AND VERIFY

THE ACTUAL DEPTH OF COVER OVER THE GEOTUBE GROINS. THE CONTRACTOR SHALL PROVIDE ADEQUATE PROTECTION FOR THE GEOTUBE GROINS AT ALL TIMES DURING

PLACEMENT OPERATIONS. SEE SHEET CN501 FOR DETAILS.

4. THE CONTRACTOR SHALL NOT OPERATE OR RUN HEAVY EQUIPMENT OVER THE TOP OF THE GEOTUBE GROINS, UNLESS THE CONTRACTING OFFICER, OR HIS/HER REPRESENTATIVE, IS SATISFIED THAT THE COVER PROVIDES ADEQUATE PROTECTION. THE CONTRACTOR SHALL NOT OPERATE OR RUN HEAVY EQUIPMENT OVER THE TOP OF THE BURIED ROCK

TERMINAL GROIN.

5. THE CONTRACTOR SHALL SELECT A 50' WIDE ROUTE AND PROVIDE ADEQUATE COVER OVER THE GEOTUBES FOR THE PLACEMENT OF ANY PIPELINE AND EQUIPMENT ACCESS AND

SUBJECT TO THE APPROVAL OF THE CONTACTING OFFICER, OR HIS/HER REPRESENTATIVE. NO PIPELINE OR EQUIPMENT SHALL CROSS THE GEOTUBES OUTSIDE THE LIMITS OF THE

APPROVED ROUTE. SEE SHEET CN501 FOR DETAILS.

6. HORIZONTAL INFORMATION BASED ON NC STATE PLANE (NAD 83/1986) SURVEY FEET. VERTICAL CONTROL BASED ON NAVD 88.

7. SEE SHEET CN105 THROUGH CN106 FOR CROSS SECTIONS.

GEOTUBE GROIN

LEGEND

BASELINE

BEACH PLACEMENT

EXISTING CONTOURS

LEGEND

-10

C N

S o u t h B e a c h P l a c e m e n t a n d S e c t i o n V i e w s d w g

100+00 101+00 102+00 103+00 104+00 105+00 106+00 107+00 108+00 109+00 110+00 111+00 112+00 113+00 114+00 115+00 116+00 117+00 118+00 119+00 120+00 121+00 122+00 123+00 124+00 125+00 126+00 127+00 128+00 129+00 130+00 131+00 132+00 133+00 134+00 135+00 136+00 137+00 138+00

139+00 140+00 141+00 142+00

143+00 144+00 145+00

146+00 147+00

P I

-2

-4

-6

-8

-10

-1

APPROX. GRION LOCATIONS

BEGIN TRANSITION - STA. 120+00

APPROX. END OF BEACH PLACEMENT- STA. 122+00

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400'0 200'

B A

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GENERAL NOTES:

1. THE WIDTH OF THE BERM WILL DEPEND ON THE FORESHORE SLOPE DURING PLACEMENT AND THE REQUIRED VOLUME TO BE PLACED BETWEEN BASELINE STATIONS. PROFILE

SURVEYS OF THE IN-PLACE FILL WILL BE USED TO ASSURE THAT THE MATERIAL IS DISTRIBUTED ALONG THE PROJECT SHORELINE. THE BEACH PLACEMENT LIMITS SHOWN ON THE

DRAWINGS ARE BASED ON THE NOVEMBER 2021 ONSHORE AND OFFSHORE SURVEYS OBTAINED BY THE VILLAGE OF BALDHEAD ISLAND.

2. THE BERM SLOPE IS DEPENDENT UPON MATERIAL PROPERTIES AND WAVE ENVIRONMENT DURING PLACEMENT.

3. GENERAL LOCATIONS OF THE GEOTUBE GROINS INSTALLED ALONG SOUTH BEACH IN 2019 ARE SHOWN ON THE PLANS. THE GEOTUBE GROINS WERE CONSTRUCTED WITH A

GEOTEXTILE FABRIC AND FILLED WITH SAND. THE GEOTUBE GROINS ARE APPROX. 10' WIDE BY 6' HIGH AT THE LANDWARD END AND APPROX. 7' WIDE BY 4' HIGH AT THE SEAWARD

END. LENGTH VARIES FROM 200' TO 350'. BEFORE ANY BEACH FILLING OPERATIONS BEGIN ON BALDHEAD ISLAND, THE CONTRACTOR SHALL FIELD LOCATE EACH GROIN AND VERIFY

THE ACTUAL DEPTH OF COVER OVER THE GEOTUBE GROINS. THE CONTRACTOR SHALL PROVIDE ADEQUATE PROTECTION FOR THE GEOTUBE GROINS AT ALL TIMES DURING

PLACEMENT OPERATIONS. SEE SHEET CN501 FOR DETAILS.

TERMINAL GROIN.

5. THE CONTRACTOR SHALL SELECT A 50' WIDE ROUTE AND PROVIDE ADEQUATE COVER OVER THE GEOTUBES FOR THE PLACEMENT OF ANY PIPELINE AND EQUIPMENT ACCESS AND

SUBJECT TO THE APPROVAL OF THE CONTACTING OFFICER, OR HIS/HER REPRESENTATIVE. NO PIPELINE OR EQUIPMENT SHALL CROSS THE GEOTUBES OUTSIDE THE LIMITS OF THE

APPROVED ROUTE. SEE SHEET CN501 FOR DETAILS.

6. HORIZONTAL INFORMATION BASED ON NC STATE PLANE (NAD 83/1986) SURVEY FEET. VERTICAL CONTROL BASED ON NAVD 88.

7. SEE SHEET CN105 THROUGH CN106 FOR CROSS SECTIONS.

GEOTUBE GROIN

LEGEND

BASELINE

BEACH PLACEMENT

EXISTING CONTOURS

LEGEND

-10

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S o u t h B e a c h P l a c e m e n t a n d S e c t i o n V i e w s d

54+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

55+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

56+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

60+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

65+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

70+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

75+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

80+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

85+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

90+00

-20

-10

-20

-10

0 100 200 300 400 500 600 700 800 9000

95+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

100+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

105+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

110+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

115+00

-30

-20

-10

-30

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0 100 200 300 400 500 600 700 800 9000

120+00

-30

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0 100 200 300 400 500 600 700 800 9000

≈300'

PLACEMENT MATERIAL

CONSTRUCTION BERM

ELEV. 7.0' (TYP.)

APPROX. TOE OF DUNE

400'0 200'

20' 40'0

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SCALE

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CN105

C N

S o u t h B e a c h P l a c e m e n t a n d S e c t i o n V i e w s d

121+00

-30

-20

-10

-30

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-10

0 100 200 300 400 500 600 700 800 9000

122+00

-30

-20

-10

-30

-20

-10

0 100 200 300 400 500 600 700 800 9000

400'0 200'

20' 40'0

VERTICAL

SCALE

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CN106

C N

S o u t h B e a c h P l a c e m e n t a n d S e c t i o n V i e w s d

MHW (1.6')

N.T.S

30'

50'

5H:1V

PIPELINE ROUTE

5H:1V

N.T.S

EXISTING GROUND

EXISTING BEACH

PROFILE (TYP.)

PIPELINE

CONSTRUCTION BERM

5H : 1V

N.T.S

EXISTING BEACH

PROFILE (TYP.)

GEOTUBE

GROIN

GEOTUBE GROIN

S O

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Y P

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T I O

N S

B E

A C

L A

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TYPICAL SECTION PIPELINE ROUTE OVER GEOTUBE GROIN

TYPICAL PROFILE PIPELINE ROUTE OVER GEOTUBE GROIN

CN501

+7.0 NAVD88

CORPS OF ENGINEERS BASELINE

(SEE NOTE 6)

S E

A W

A R

D G

GEOTUBE GROIN

2' MIN.

(SEE NOTE 7)

2' MIN.

(SEE NOTE 7)

CORPS OF ENGINEERS

BASELINE

DETAIL A

CONSTRUCTION

BERM

EL. +7.0' NAVD88

TYPICAL SECTION - BALD HEAD ISLAND

SOUTH BEACH BERM (7.0 NAVD 88)

EL. 9.0' NAVD 88

(SEE NOTE 7)

EL. 9.0' NAVD 88

(SEE NOTE 8)

NOTES:

1. ELEVATIONS ARE IN FEET NORTH AMERICAN VERTICAL DATUM - 1988 (NAVD 88).

2. A VERTICAL TOLERANCE OF 0.5' ABOVE AND BELOW THE PRESCRIBED BERM GRADE AND SLOPES AT AND ABOVE THE TOP

OF BERM ELEVATION LINE SHALL BE PERMITTED IN THE FINISHED SURFACE.

3. THE WIDTH OF THE BERM WILL DEPEND ON THE FORESHORE SLOPE DURING PLACEMENT AND THE REQUIRED VOLUME TO

BE PLACED BETWEEN BASELINE STATIONS. PROFILE SURVEYS OF THE IN-PLACE FILL WILL BE USED TO ADJUST THE

WIDTH OF THE BERM TO ASSURE THAT THE PROPER VOLUME OF MATERIAL IS DISTRIBUTED ALONG THE PROJECT

SHORELINE.

4. BERM SLOPE IS DEPENDENT UPON MATERIAL PROPERTIES AND WAVE ENVIRONMENT DURING PLACEMENT.

5. SEE SHEETS CN103 THRU CN106 FOR BEACH PLACEMENT AREAS AND FOR LOCATION OF CORPS OF ENGINEERS

BASELINE. NO BEACH PLACEMENT MATERIAL SHALL BE PLACED LANDWARD OF THE BASELINE EXCEPT AS SHOWN ON THE

DRAWINGS. NO BEACH PLACEMENT MATERIAL SHALL BE PLACED WITHIN 10 FEET OF ANY EXISTING BUILDING.

6. THE CONTRACTOR SHALL EXTEND 7.0' NAVD88 CONSTRUCTION BERM LANDWARD TO THE POINT OF INTERSECTION WITH

THE EXISTING GROUND EXCEPT WHERE SHOWN ON THE DRAWINGS OR WHERE THIS EXTENSION WOULD RESULT IN

PLACEMENT OF DREDGED MATERIAL LANDWARD OF THE BASELINE OR WITHIN 10 FEET OF AN EXISTING BUILDING.

WHERE THE CONSTRUCTION BERM DOES NOT TIE INTO THE EXISTING 7.0' NAVD 88 CONTOUR, THE CONTRACTOR SHALL

BE REQUIRED TO SLOPE THE CONSTRUCTION BERM 5H:1V FROM THE LANDWARD CREST TO TIE INTO THE EXISTING

GROUND.

7. THE CONTRACTOR SHALL NOT PLACE ANY BEACH PLACEMENT MATERIAL, PIPELINE OR EQUIPMENT IN THE AREA OF THE

GEOTUBE GROINS UNLESS APPROPRIATE PROTECTIVE MEASURES HAVE BEEN TAKEN AND APPROVED BY THE

CONTRACTING OFFICER. IN AREAS WHERE THE PIPELINE OR EQUIPMENT CROSSES THE EXISTING GEOTUBE GROINS, THE

CONTRACTOR SHALL PROVIDE A MINIMUM FILL COVER OF 2 FEET OR TO ELEV. 9' NAVD 88, WHICHEVER IS GREATER OVER

THE GEOTUBE GROINS BEFORE ANY BEACH PLACEMENT CAN OCCUR. SEE SECTION 35 20 23 OF THE SPECIFICATIONS FOR

ADDITIONAL REQUIREMENTS.

8. UPON THE DIRECTION OF THE CONTRACTING OFFICER, THE CONTRACTOR SHALL TILL THE BEACH PLACEMENT AREA IN

AREAS IDENTIFIED BY THE CONTRACTING OFFICER.

9. DISPOSAL OF DREDGED MATERIAL SHALL CONTINUE DOWN THE BEACH AS FAR AS THE QUANTITY OF DREDGED MATERIAL

WILL ALLOW. A TRANSITION WITH A MINIMUM LENGTH OF 200' WHICH TIES BACK INTO THE EXISTING 7' CONTOUR SHALL

BE PROVIDED AT THE END OF THE BEACH PLACEMENT LIMITS.

SEE DETAIL A

DISTANCE VARIES

DISTANCE

VARIES

300'

(SEE NOTE 3)

SLOPE INTERCEPT: EXISTING EL. +7.0'

LANDWARD CONTOUR

C N d w g

C O

N T

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L I C

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K E

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SHEET ID

2 3 4 5 6 7 8 9 10

US Army Corps of Engineers

M A

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T E

N A

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R E

D G

I N

W I L

M I N

G T

B O

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ASSUMED SLOPE DURING

CONSTRUCTION

(SEE NOTE 4)

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RTA PLANS

G-001 COVER SHEET

GI001 INDEX OF DRAWINGS, PROJECT VICINITY & LOCATION MAPS

CN101 SMITH ISLAND CHANNEL

CN102 BALDHEAD SHOAL CHANNEL REACH 2

CN103 PLAN VIEW BALDHEAD ISLAND SOUTH BEACH PLACEMENT

CN104 PLAN VIEW BALDHEAD ISLAND SOUTH BEACH PLACEMENT

CN105 SECTION VIEW BALDHEAD ISLAND SOUTH BEACH PLACEMENT

CN106 SECTION VIEW BALDHEAD ISLAND SOUTH BEACH PLACEMENT

CN501 SOUTH BEACH TYPICAL SECTIONS BEACH PLACEMENT AREA

Sheet 1

Reference Drawings

R-01 AS-BUILT CABLE ROUTE, INDEX, NOTES, AND LEGEND

R-02 AS-BUILT CABLE LOCATION STA. 57+00 TO STA. 85+58

R-03 AS-BUILT WATERLINE EXTENSION INDEX SHEET GENERAL NOTES

R-04 AS-BUILT WATERLINE EXTENSION PLAN AND PROFILE STA. 0+00 TO STA. 28+00

R-05 AS-BUILT WATERLINE EXTENSION PLAN AND PROFILE STA. 28+00 TO STA. 57+00

R-06 AS-BUILT WATERLINE EXTENSION PLAN AND PROFILE STA. 57+00 TO STA. 85+58

R-07 BALDHEAD ISLAND BEACH & GROIN FIELD CONDITION - APRIL 2018

R-08 BALDHEAD ISLAND BEACH & GROIN FIELD SECTIONS AND DETAILS

R-09 BALDHEAD ISLAND BEACH & GROIN FIELD AS-BUILT SAND TUBE GROIN LOCATIONS

File details come from the government source that posted it. Updated Jun 27, 2022.