A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans_6-28-22.pdf

PDF 7 MB Posted Jun 28, 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

About this file

Written by GovTribe AI · Dec 28, 2023

This solicitation is for maintenance dredging services at Wilmington Harbor Inner Ocean Bar in Brunswick County, North Carolina. The U.S. Army Corps of Engineers, Wilmington District requires dredging of approximately 1,000,000 cubic yards of material from Bald Head Shoal Channel Reaches 1 and 2 to a depth of 44 feet plus 2 feet of allowable overdepth. Dredged material will be disposed of on Bald Head Island and possibly Caswell Beach and Oak Island using a hydraulic cutter suction dredge. The environmental dredging window is from 16 November to 30 April. This will be an unrestricted, firm fixed price contract with a magnitude between $10,000,000 and $25,000,000. The solicitation number is W912PM22B0020 and will be issued electronically on or around 30 June 2022. Bidders must be registered in the System for Award Management to be eligible for award. Interested parties should monitor the SAM website and contact the named Army Corps contract specialists for additional information.

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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 - RTA-SPECS2-FY23WHIOB.pdf	PDF	Jun 27, 2022
A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans.pdf	PDF	Jun 27, 2022
A21 - W912PM22B0020_Wilmington-Harbor_Inner_Ocean_Bar_RTA_Plans_unlocked (1).pdf	PDF	Jun 27, 2022
A21 - W912PM22B0020.pdf	PDF	Jun 27, 2022

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G-001

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US Army Corps of Engineers

SOLICITATION NO.:

CONTRACT NO.:

ISSUE DATE:

WILMINGTON DISTRICT

TBD

JUNE 2022

W912PM22B0020

MAINTENANCE DREDGING

WILMINGTON HARBOR INNER OCEAN BAR

BRUNSWICK COUNTY, NORTH CAROLINA

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Approval Recommended: *

Approved: *

DATE

SIGNATURES AFFIXED BELOW INDICATE OFFICIAL RECOMMENDATION

AND APPROVAL OF ALL DRAWINGS IN THIS SET AS INDEXED ON THIS SHEET.

CHIEF, ENGINEERING BRANCH

* THIS PROJECT WAS DESIGNED BY THE U.S. ARMY CORPS OF ENGINEERS,

WILMINGTON DISTRICT. INDIVIDUALS WHOSE SIGNATURES AND REGISTRATION

DESIGNATIONS APPEAR ON THESE DOCUMENTS ARE OPERATING WITHIN THE

SCOPE OF THEIR EMPLOYMENT. SIGNATURES ARE REQUIRED BY ER 1110-1-8152.

CHIEF, DESIGN and GENERAL ENGINEERING SECTION

21 JUNE 2022

SCALE IN FEET

4000 2000 2000 4000 6000

SCALE: 1" = 2000'

PROJECT SITE PLAN

L a p e

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R i v r

N t l n t i c

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HYDE

BEAUFORT

PITT

EDGECOMBE

WASHINGTON

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ONSLOW

DUPLIN

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DURHAM

HALIFAX

NORTHAMPTON

HERTFORD

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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.

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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

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RIVER

N: 46536.8

E: 2300697.8

SMITH ISLAND CHANNEL

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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.

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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'

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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.

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"ltb11" 2297403.52 42931.18

"ltb9" 2295506.43 39491.91

"ltb10" 2296568.87 39015.06

"ltb12" 2298443.72 42991.84

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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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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

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BEGIN TRANSITION - STA. 120+00

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

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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

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

54+00

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55+00

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0 100 200 300 400 500 600 700 800 9000

56+00

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0 100 200 300 400 500 600 700 800 9000

60+00

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0 100 200 300 400 500 600 700 800 9000

65+00

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0 100 200 300 400 500 600 700 800 9000

70+00

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0 100 200 300 400 500 600 700 800 9000

75+00

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0 100 200 300 400 500 600 700 800 9000

80+00

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0 100 200 300 400 500 600 700 800 9000

85+00

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0 100 200 300 400 500 600 700 800 9000

90+00

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0 100 200 300 400 500 600 700 800 9000

95+00

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100+00

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105+00

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115+00

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0 100 200 300 400 500 600 700 800 9000

120+00

-30

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-10

-30

-20

-10

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

VERTICAL

SCALE

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US Army Corps of Engineers

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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

121+00

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0 100 200 300 400 500 600 700 800 9000

122+00

-30

-20

-10

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-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

U T

E A

Y P

I C

T I O

N S

B E

A C

L A

C E

M E

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

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US Army Corps of Engineers

M A

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ASSUMED SLOPE DURING

CONSTRUCTION

(SEE NOTE 4)

.../Reference_Drawings/R-16.dgn 08/19/2004 04:05:48 PM

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44000N

40000N

41000N

42000N

43000N

SOUTH BEACH

NOTES:

1. DATE OF PHOTOGRAPHY: APRIL 2018

2. BEACH CONDITIONS SUBJECT TO CHANGE.

3. TERMINAL GROIN CONSTRUCTED 2015.

4. GROINS TO BE BURIED BY 2018/19 BEACH RENOURISHMENT PROJECT

WHICH WILL PRECEDE REPAIR PROJECT.

5. GROIN TERMINUS LOCATIONS AND LENGTHS TO BE MODIFIED..

CAPE

FEAR

RIVER

# - GROINS TO BE REPLACED THIS CONTRACT

DRAWN BY: ML

CHECKED BY: EJO

DATE: 03/25/2020

olsen associates, inc.

coastal engineering

2618 Herschel Street

Jacksonville, FL 32204

Tel. (904) 387-6114

COA - 1468

GROIN FIELD REPLACEMENT PROJECT

BALD HEAD ISLAND, NORTH CAROLINA

BEACH & GROIN FIELD

CONDITION - APRIL 2018

DESCRIPTIONLTR BY DATE APPRVD

REVISIONS

REVISED BY:

DATE: 03/25/2020

DATE:

3000 600 FEET

SCALE

SAND BAG REVETMENT

BURIED IN DUNE

GROIN LOCATION,

TYP.

TERMINAL ROCK GROIN

GROINS PARTIALLY

EXPOSED, TO BE COVERED

AFTER 2019 BEACH FILL

NOTES:

1. UNLESS OTHERWISE SPECIFIED BY ENGINEER, GROIN

REPLACEMENT WILL PROCEED FROM WEST TO EAST.

2. GROIN EXCAVATION AND REPLACEMENT TIMING WILL BE

DEPENDENT UPON THE ACCEPTANCE BY THE ENGINEER OF

COMPLETED SECTIONS OF BEACH FILL.

ACCESS

POINT

REVISED NOTESA ML 12/06/18 EJO

GROINS 12,14 & 15 ADDEDB ML 2/08/19 EJO

AutoCAD SHX Text

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INSTALL GEOTEXTILE AND

GROIN ON EXISTING BEACH

GRADE WHERE GRADE IS LESS

THAN +2.0 FT. FILL

(RAISE) GRADE TO +2.0 FT

EXCAVATE BEACH GRADE TO +2.0 FT

THRU SEAWARD END OF BERM

BACKFILL TRENCH AFTER INSPECTION/

APPROVAL BY ENGINEER

VARIES

RESTORE LANDWARD-END EXCAVATION,

AND SAND GRADE TO PRE-EXCAVATION CONDITIONS.

COVER GROIN WITH SAND TO PRE-EXCAVATION (ADJACENT)

BEACH GRADE AFTER GROIN IS INSTALLED, INSPECTED, AND APPROVED.

ELEV. +2.0 FT

GEOTEXTILE UNDERLAYER

ELEV. +8 FT

48"

ELEV. VARIES

- DISTORTED SCALE (3:1)

- SEE SHEETS 8 & 9 FOR BEACH FILL DESIGN AND LIMITS

- ACTUAL BEACH FILL CONDITIONS AND SLOPES WILL VARY

ELEVATION (PROFILE)

GROIN (TYP)

TOE TUBES

POST-FILL BEACH GRADE AND DIMENSIONS

(WILL VARY AT TIME OF CONSTRUCTION)

ELEV. +7.7 FT

15'

UNSUPPORTED END

SHALL BE ALLOWED

TO SETTLE AS "ANCHOR"

3.0' (TYP)

S L O

P E

BEACH FILL PROFILE

EXISTING

GRADE

PRE-FILL

BEACH PROFILE

SPECIFIED START POINT

FILLED (IN PLACE) HEIGHT:

SECTION "B-B" =4.8 FT (58")

(CIRCUM.=21.4', EQUIV. DIA. =6.8') *

8.2'±

(WIDTH SHALL BE LESS

THAN 1.85 x HEIGHT)

6.8'±

(WIDTH SHALL

BE LESS THAN

1.85 x HEIGHT)

FILLED (IN PLACE) HEIGHT:

SECTION "C-C" = 4 FT (48")

(CIRCUM.=17.8', EQUIV. DIA. =5.7') *

SECTION B-B: MID-TUBE

SECTION C-C: SEAWARD END

SECTION A-A: LANDWARD END

(SEE NOTE 6)

9.8'±

(WIDTH SHALL BE LESS

THAN 1.85 x HEIGHT)

FILLED (IN PLACE) HEIGHT:

SECTION "A-A" =5.7 FT (68")

(CIRCUM.=25.5', EQUIV. DIA. =8.1') *

18" DIA.

TOE TUBE (TYP.)

20.0'

18" DIA.

TOE TUBE (TYP.)

20.0'

WERE EXPOSED AFTER TUBE INSTALLATION

TRENCH OR JET TOE-TUBE INTO SAND

GRADE SO THAT TOP OF TUBE IS LEVEL

WITH SCOUR APRON, TYP.

SCOUR APRON

ELEV. = +2.0 FT

TRENCH TO BE BACKFILLED

NOTE: TAPERED TUBE

20'

MIN.

G R

N G

20'

GEOTEXTILE

UNDERLAYER

(SCOUR APRON)

18" TOE TUBE

INTEGRAL TO

SCOUR APRON

(MUST BE FILLED)

PROVIDE TOE TUBE

AT END, DO NOT FILL

UNLESS DIRECTED.

BY ENGINEER

E R

L A

Y M

E N

NOTE: TAPERED TUBE WITH

SPIRAL SEAM

NOTE: FILL PORTS

NOT SHOWN

ALL TUBES ARE

UNLINED AND

DOUBLE COATED

NOTES:

1. PROJECT SHALL BE FINALLY ACCEPTED BY OWNER BEFORE 1 APRIL, 2019.

2. REPLACEMENT PROGRAM DESIGN REPRESENTS CONDITIONS OF EXISTING

STRUCTURES TO BE REMOVED AND REPLACED.

3. FILL PORTS AND PLATES SHALL BE PROVIDED AND INSTALLED BY THE

CONTRACTOR.

4. OWNER SHALL PROVIDE ALL TUBES AND UNDERLAYMENT.

5. FILL PORT DESIGN - SEE SHEET 11.

6. WHERE TUBES ARE LESS THAN 300FT IN LENGTH, THE LANDWARD END SHALL

HAVE A CIRCUMFERENCE OF LESS THAN 25.5 FT.

7. CONTRACTOR SHALL QA/QC EACH TUBE UPON RECEIPT FROM BIT, INC.

DRAWN BY: ML

CHECKED BY: EJO

DATE: 03/25/2020

olsen associates, inc.

coastal engineering

2618 Herschel Street

Jacksonville, FL 32204

Tel. (904) 387-6114

COA - 1468

GROIN FIELD REPLACEMENT PROJECT

BALD HEAD ISLAND, NORTH CAROLINA

SECTION AND DETAILS

DESCRIPTIONLTR BY DATE APPRVD

REVISIONS

REVISED BY:

DATE: 03/25/2020

DATE:

LANDWARD

END

MID-LENGTH

SEAWARD

END

REPLACEMENT SCHEDULE (2019)

13 GROIN TUBES WITH VARYING LENGTHS

NOTE: EACH SCOUR APRON LENGTH IS 15 FT LESS

THAN TUBE LENGTH AT SEAWARD END

GROIN PLAN

FILL SECTIONS

TYPICAL CONDITION

EXCAVATION OF EXISTING GROIN

GROIN TUBE PRIOR TO FILLING

COMPLETED GROIN - LANDWARD END PRIOR TO BACKFILL

COMPLETED GROIN - SEAWARD END PRIOR TO BACKFILL

2010 2010

EXAMPLE - 2010 PROJECT AS BUILT

NOTE - PLATES

TUBES FABRICATED BY BRADLEY INDUSTRIAL TEXTILES, INC. (BIT, INC.)

NOTE: THE TUBE LINING HAS BEEN DELETED

MODIFICATION OF DESIGN NOTESA ML 12/06/18 EJO

NUMBER OF TUBES INCREASEDB ML 2/08/19 EJO

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R-8

40000N

41000N 41000N

42000N 42000N

43000N

G-3

G-4

G-5

G-6

G-7

G-8

G-9

G-10

G-11

G-13

G-15

G-12

G-14

2500 500 FEET

SCALE

TERMINAL

GROIN

ATLANTIC OCEAN

AERIAL IMAGE DATE: NOV 2019

· ACCURACY ± 10FT

· REPLACED IN FEB/MARCH 2019

· AS-BUILT GROIN LENGTHS VARY

FROM 230FT TO 300 FT

· ALL 13 GROINS REPLACED AFTER

REMOVAL OF EXISTING GROIN

SAND TUBE GROIN LOCATIONS (AS-BUILT)

BURIED SAND

TUBE, TYP.

DRAWN BY: ML

CHECKED BY: EJO

DATE: 03/25/2020

olsen associates, inc.

coastal engineering

2618 Herschel Street

Jacksonville, FL 32204

Tel. (904) 387-6114

COA - 1468

GROIN FIELD REPLACEMENT PROJECT

BALD HEAD ISLAND, NORTH CAROLINA

AS-BUILT SAND TUBE GROIN

LOCATIONS

DESCRIPTIONLTR BY DATE APPRVD

REVISIONS

REVISED BY:

DATE: 03/25/2020

DATE:

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R-9

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 28, 2022.