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2017-2019 MAINTENANCE DREDGING, DILLINGHAM HARBOR, DILLINGHAM, ALASKA Federal contract opportunity
Solicitation number
W911KB-17-B-0001
Issued by
Department of the Army Corps of Engineers Engineering District Alaska

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of Engineers

Alaska District

US Army Corps

2017 - 2019 HARBOR

MAINTENANCE DREDGING

W911KB-17-B-0001

DILLINGHAM, ALASKA

DHA007

IFB, 17 OCTOBER 2016

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

G d w g l a s t s a v e d o n

P

M w a s p l o t t e d b y

K o s t e r

R e b e c c

E

P

O A

A

M

Drawing # 5-DIL-91-01-06 Sheet 1 of 10

P2 NO. 102409

TABLE OF CONTENTS

Sheet

Num

Sheet

Number

Sheet Title

GENERAL: GENERAL

1 G-001 COVER SHEET

GENERAL: PLANS

2 G-101 LOCATION AND VICINITY MAP

CIVIL: PLANS

3 C-101 SITE PLAN AND SURVEY CONTROL

4 C-102 DREDGED MATERIAL DISPOSAL SITE

CIVIL: SECTIONS

5 C-301 TYPICAL SECTION

EXHIBIT DRAWINGS: PLANS

6 X-801 EXHIBIT-1

7 X-802 EXHIBIT-2

8 X-803 EXHIBIT-3

9 X-804 EXHIBIT-4

10 X-805 EXHIBIT-5

FAIRBANKS

ARCTIC OCEANCHUCKCHI SEA

0 200 400 600 800

Scale in Miles

LOCATION/VICINITY MAP(S)

JUNEAU

BERING SEA

ALEUTIAN ISLANDS

ATKA

GULF OF ALASKA

BRISTOL

BAY

C

O

I

N

L

E

T

NOME

KOTZEBUE

BARROW

ANCHORAGE

DILLINGHAM HARBOR

DILLINGHAM, ALASKA

LEVEL

EXT. HIGH WATER LEVEL

MEAN HIGHER HIGH WATER (MHHW)

MEAN HIGH WATER (MHW)

MEAN SEA LEVEL (MSL)

MEAN TIDE LEVEL (MTL)

MEAN LOW WATER (MLW)

MEAN LOWER LOW WATER (MLLW)

EXT. LOW WATER LEVEL

ELEVATION

(FT MLLW)

+25.0

+20.6

+18.9

+10.8

+10.6

+2.3

0.0

-4.9

TIDAL DATA, DILLINGHAM, ALASKA

9465374 SNAG POINT, DILLINGHAM, AK

SOURCE: NOAA NATIONAL OCEAN SERVICE

PUBLISHED 04/29/2013, TIDAL EPOCH: 1983-2001

GENERAL NOTES

1. NO CONTRACTOR'S STAGING AREA IS PROVIDED FOR THIS

CONTRACT.

2. THE PROJECT SITE IS SUBJECT TO HIGH WINDS, WAVES, AND

CURRENTS. SUCH WAVE AND CURRENT CONDITIONS CAN AND DO

OCCUR ANY TIME IN OPEN WATER. THE CONTRACTOR SHALL PLAN

AND PERFORM ITS CONSTRUCTION ACTIVITIES AND SEQUENCE TO

TAKE INTO ACCOUNT SUCH CONDITIONS.

3. ICE CONDITIONS IN THE NUSHAGAK RIVER VARY FROM YEAR TO

YEAR. THE HARBOR MOORING BASIN AND ENTRANCE CHANNEL MAY

STILL BE FROZEN FOR SEVERAL WEEKS AFTER BREAKUP IN THE

RIVER.

4. THE CONTRACTOR SHALL TAKE ALL APPROPRIATE PRECAUTIONS

TO AVOID ANY DISTURBANCE OF THE EXISTING FACILITIES AND

OTHER HARBOR INFRASTRUCTURE LOCATED IN THE VICINITY OF

THE PROJECT SITE.

5. THE CONTRACTOR SHALL COORDINATE WITH THE CITY OF

DILLINGHAM HARBORMASTER, FUEL COMPANIES, AND FISH

PROCESSORS TO MINIMIZE DISRUPTION OF HARBOR OPERATIONS.

ALASKA DISTRICT

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REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

G d s t s a v e d o n

P

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

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P

N

O

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O

C T

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IFB

H

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B O

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A I N

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N A

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D I L

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G-101

L O

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PROJECT LOCATION

(SEE INSET BELOW)

NOAA CHART 16322, BRISTOL BAY - NUSHAGAK BAY AND APPROACHES

DATED MAY 2014, 9TH ED.

SOUNDINGS ARE IN FEET, DATUM: MEAN LOWER LOW WATER (MLLW)

NOTE:

FOR DETAILED NOAA CHART INFORMATION SEE

http://www.charts.noaa.gov/OnLineViewer/AlaskaViewerTable.shtml

SOURCE:

INSET FROM NOAA CHART 16332

SOURCE:

GOOGLE EARTH

IMAGERY DATED OCT. 30, 2005

PROJECT

LOCATION

DREDGING

LIMITS

MOORING

BASIN

ENTRANCE

CHANNEL

ROCK SILL

(PARTIALLY REMOVED)

DREDGED MATERIAL

DISPOSAL SITE

N

U

S

H

A

G

V

E

R

AutoCAD SHX Text 59%%d02'20"

AutoCAD SHX Text 59%%d02'10"

AutoCAD SHX Text 59%%d02'30"

AutoCAD SHX Text 158%%d27'30"

AutoCAD SHX Text 158%%d28'00"

AutoCAD SHX Text 158%%d28'30"

AutoCAD SHX Text 158%%d29'00"

AutoCAD SHX Text

TO AIRPORT

AutoCAD SHX Text

MLLW

AutoCAD SHX Text

MHHW

AutoCAD SHX Text

ENTRANCE

AutoCAD SHX Text

MOORING

AutoCAD SHX Text

NUSHAGAK RIVER

AutoCAD SHX Text

BASIN

AutoCAD SHX Text

DREDGING

AutoCAD SHX Text

LIMITS

AutoCAD SHX Text

CHANNEL

AutoCAD SHX Text

DREDGED MATERIAL

AutoCAD SHX Text

DISPOSAL SITE

AutoCAD SHX Text

VICINITY MAP

AutoCAD SHX Text

PROJECT

AutoCAD SHX Text

DILLINGHAM

AutoCAD SHX Text N

AutoCAD SHX Text

LOCATION

AutoCAD SHX Text

ROCK

AutoCAD SHX Text

SILL

DL-01

DL-02

DL-03

DL-04

DL-05

DL-06

DL-07

DL-08

DL-09

DL-10

SL-03

SL-04

SL-05

SL-06

SL-07

SL-08

SL-09

SL-10

SL-11

SL-12

SL-01

D

R

E D

G

E L

IM

IT

S

D

R

E D

G

E

L I M

I T

S

D

R

E

D

G

L

M

I T

S

D

R

E D

G

E

L I M

I T

S

D

R

E D

G

E L

IM

IT

S

1277-1 1984

1277-2 1984

1277-3 1984

DIL 1998

PICKEL 1998

WDS-2 2001

10+00.00

11+00.00

12+00.00

13+00.00

14+00.00

15+00.00

16+00.00

17+00.00

18+00.00

19+00.00

20+00.00

21+00.00

22+00.00

23+00.0023+00.01

R I P

R A

P

S H

E E

T P

IL

E

R

A

M

P

RIPRAP

S

C

A

N

D

I

N

A

V

I

E

E

K

D O

C K

D

O

C

K

R

A

M

P

F

L

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T

R

A

M

P

P

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B

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K

I N

G

HARBORMASTER OFFICE

ROCK SILL

(PARTIALLY REMOVED)

EXIST. CMP

(APPROX. LOCATION)

PETER PAN PROPERTY

(OLD DISPOSAL SITE)

(NOT IN THIS CONTRACT)

D

IK

E

D

I K

E

D

I K

E

D

I K

E

MOORING BASIN

DREDGE TO 0.0' MLLW

(MAX PAYLINE -2.0' MLLW)

ENTRANCE CHANNEL

DREDGE TO 0.0' MLLW

(MAX PAYLINE -2.0' MLLW)

SEE SHEET C-102 FOR

DREDGED MATERIAL DISPOSAL

SITE IN THE NUSHAGAK RIVER

(THIS CONTRACT)

N 1,841,500

N 1,841,000

E

E

E

E

E

E

N 1,840,500

E

E

N 1,841,750

E

E

N 1,841,250

N 1,840,750

E

E

N 1,840,500

E

N 1,840,750

N 1,841,000

N 1,841,250

N 1,841,500

N 1,841,750

E

S

U

R

V

Y

M

I T

S

S

U

R

V

M

I

T

S

SL-02

S U

R

V E

Y

L I M

I T

S

S U

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V E

Y L

IM

IT

S

S U

R

V E

Y

L I M

I T

S

CONTROL DATA

STATION

1277-1 1984

1277-2 1984

1277-3 1984

5374 A 2007

5374 B 2007

DIL 1998

DILLINGHAM 1947

DILLINGHAM AZ MK

PICKEL 1998

WDS-2 2001

NORTHING

1,841,622.39

1,840,494.00

1,840,427.98

1,840,570.45

1,840,567.99

1,840,505.33

1,849,383.08

1,841,347.21

1,841,509.51

1,841,419.33

EASTING

1,550,745.71

1,550,879.74

1,550,887.60

1,553,897.99

1,553,619.36

1,550,674.26

1,551,809.45

1,553,844.91

1,550,437.81

1,549,910.66

ELEV.

32.11

30.86

30.21

25.62

24.87

29.80

28.82

22.77

DESCRIPTION

3.25" USACE SBC

3.25" USACE SBC

3.25" USACE SBC

STAINLESS STEEL ROD

STAINLESS STEEL ROD

3.25" FLAT ALUMINUM CAP

3.5" USCGS SBC

USCGS 2" IRON PIPE

3.25" FLAT ALUMINUM CAP

3.25" DOMED ALUMINUM CAP

DREDGING LIMITS

CORNER

DL-01

DL-02

DL-03

DL-04

DL-05

NORTHING

1,840,656.89

1,840,645.10

1,840,669.87

1,841,364.89

1,841,318.54

EASTING

1,550,430.66

1,550,447.69

1,550,654.63

1,550,571.44

1,550,184.21

DREDGING LIMITS

CORNER

DL-06

DL-07

DL-08

DL-09

DL-10

NORTHING

1,840,930.19

1,840,662.40

1,840,535.05

1,840,531.77

1,840,653.73

EASTING

1,550,305.22

1,550,337.15

1,550,329.96

1,550,369.82

1,550,376.57

SURVEY LIMITS

CORNER

SL-01

SL-02

SL-03

SL-04

SL-05

SL-06

NORTHING

1,840,423.95

1,840,458.17

1,840,564.87

1,840,610.25

1,841,437.06

1,841,461.80

EASTING

1,550,449.36

1,550,413.54

1,550,408.42

1,550,787.66

1,550,688.69

1,550,593.75

SURVEY LIMITS

CORNER

SL-07

SL-08

SL-09

SL-10

SL-11

SL-12

NORTHING

1,841,405.12

1,841,432.20

1,841,432.01

1,841,362.83

1,840,909.22

1,840,362.44

EASTING

1,550,578.98

1,550,396.29

1,550,133.89

1,550,065.66

1,550,207.01

1,550,272.21

NOTES

HORIZONTAL CONTROL:

1. PRIMARY PROJECT HORIZONTAL CONTROL IS ALASKA STATE PLANE, ZONE 6, NAD83

(2011), IN US SURVEY FEET BASED ON NGS PUBLISHED VALUES, HOLDING USC&GS

STATION "DILLINGHAM 1947" (PID UV7691) AS N 1,849,383.08', E 1,551,809.45 AND USC&GS

AZIMUTH MARK "DILLINGHAM AZ MK 1947" (PID UV7690) AS N 1,841,347.21', E 1,553,844.91'.

LOCAL PROJECT HORIZONTAL CONTROL IS ALASKA STATE PLANE, ZONE 6, NAD83 (2011),

IN US SURVEY FEET HOLDING USACE DOMED BC "1277-3 1984" AS N 1,840,427.98', E

1,550,887.60'.

VERTICAL CONTROL:

2. VERTICAL CONTROL IS MEAN LOWER LOW WATER (MLLW=0.0'), BASED ON NOAA/NOS

TIDAL BENCH MARK LIST: "946 5374, SNAG POINT, NUSHAGAK BAY, DILLINGHAM, ALASKA"

PUBLISHED 04/29/2013. THIS TIDAL DATUM IS BASED ON THE 1983-2001 TIDAL EPOCH AND

IS REFERENCED BY HOLDING HOLDING NOAA/NOS TIDAL BENCHMARK "5374 B 2007" AS

24.87'.

VERTICAL TIES TO THE NATIONAL SPATIAL REFERENCE SYSTEM ARE BASED ON

PUBLISHED NAVD88 (GEOID 12B) ELEVATION HOLDING NOAA SS DRIVE ROD "5374 B 2007"

(PID BBBF17) AS 18.46'.

3. EXISTING FLOATS AND OTHER FACILITIES WITHIN THE DREDGE LIMITS WILL BE REMOVED

SEASONALLY BY THE CITY OF DILLINGHAM. THE CONTRACTOR SHALL COORDINATE WITH

HARBORMASTER FOR SUCH REMOVAL PRIOR TO DREDGING. THE EXISTING PILE

SUPPORTS FOR THE FLOAT SYSTEM WILL NOT BE REMOVED OR DISTURBED.

4. EXISTING FACILITIES WITHIN AND IN THE VICINITY OF THE HARBOR (DOCKS, FLOATS, AND

RAMPS) ARE SHOWN AS APPROXIMATE LOCATIONS AND NOT BASED ON SURVEY DATA.

NOTE: STATION 1277-1, 1277-2, 1277-3, DIL, PICKEL, AND WDS-2 ARE SHOWN IN PLAN VIEW ON

THIS SHEET. OTHER STATIONS ARE LOCATED IN VARIOUS AREAS IN THE VICINITY OF THE

HARBOR.

ELEVATIONS ARE IN FEET AND REFERENCED TO MEAN LOWER LOW WATER (MLLW).

LEGEND: SURVEY MONUMENT

BASELINE DATA

STATION

10+00

23+00

NORTHING

1,840,346.59

1,841,637.43

EASTING

1,550,897.16

1,550,743.04

DESCRIPTION

BEGIN

END

NOTE: SURVEY LIMITS CONTINUED ON SHEET C-102.

ALASKA DISTRICT

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C T

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C O

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B M

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N E

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V I E

W E

D

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F I C

E

S

Y M

O F

F I C

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S

Y M

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I N

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D

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T R

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A N

C H

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A G

E

A

L A

S K

A

C O

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S

O

F

E

N G

I N

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REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

C d s t s a v e d o n

A

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

A

P

N

O

W K

B B

O

C T

O B

IFB

H

A R

B O

R

M

A I N

T E

N A

N C

E

D

R E

D G

I N

G

D I L

L I N

G H

A M

A

L A

S K

A

ALASKA DISTRICT

D R

A W

I N

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F I L

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D W

G

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C A

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P L

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L E

D A

T E

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S I D

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E

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I N

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D A

T E

S T

A T

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I M

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C

O N

T R

A C

T O

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D A

T E

D E

S C

R I P

T I O

N A

P P

D

C I T

Y

C O

N T

R A

C T

O R

C O

N T

R A

R E

C O

M M

E N

D E

D

A P

P R

O V

E D

S U

B M

I T

T E

D

D E

S I G

N E

D

R E

V I E

W E

D

O F

F I C

E

S

Y M

O F

F I C

E

S

Y M

U S

A

R M

Y

E

N G

I N

E E

R

D

I S

T R

I C

T

A N

C H

O R

A G

E

A

L A

S K

A

C O

R P

S

O

F

E

N G

I N

E E

R S

REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

C d s t s a v e d o n

A

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

A

P

N

O

W K

B B

O

C T

O B

IFB

H

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B O

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D

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D I L

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A M

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L A

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C E

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D

B

L I S

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K

E

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C I V

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C

P L

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C-101

S I T

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P

L A

N

A

D

U R

V E

Y

C

O N

T R

O L

N

Feet

0 100 200

AutoCAD SHX Text A

AutoCAD SHX Text C-101

C-301

SL-15

SL-16SL-13

SL-14

DS-01

DS-02

DS-03

DS-04

D

I

S

P

O

S

M

I

T

S

D

I

S

P

O

S

M

I

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D

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P

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D

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DREDGED MATERIAL

DISPOSAL SITE

(THIS CONTRACT)

N

U

S

H

A

G

V

E

R

N 1,838,885

E

E

E

E

E

E

E

E

E

E

N 1,840,135

E

N 1,839,885

N 1,839,635

N 1,839,385

N 1,839,135

E

N 1,840,135

E

N 1,839,885

N 1,839,635

N 1,839,385

N 1,839,135

N 1,838,885

E

SEE SHEET C-101 FOR

HARBOR DREDGING SITE PLAN

SURVEY LIMITS

S U

R V

M

I T

S

SURVEY LIMITS

S U

R V

M

I T

S

SL-17

SURVEY LIMITS

CORNER

SL-13

SL-14

SL-15

NORTHING

1,840,166.00

1,839,293.60

1,839,293.60

EASTING

1,550,359.57

1,550,359.57

1,551,455.40

SURVEY LIMITS

CORNER

SL-16

SL-17

NORTHING

1,840,166.00

1,840,166.00

EASTING

1,551,455.40

1,550,808.47

DREDGED MATERIAL (DISPOSAL SITE LIMITS)

CORNER

DS-01

DS-02

NORTHING

1,839,502.58

1,839,739.66

EASTING

1,551,238.87

1,551,159.55

DREDGED MATERIAL (DISPOSAL SITE LIMITS)

CORNER

DS-03

DS-04

NORTHING

1,839,644.47

1,839,407.39

EASTING

1,550,875.05

1,550,954.38

NOTES

1. BATHYMETRY FOR THE DREDGED MATERIAL DISPOSAL AREA IN THE NUSHAGAK RIVER IS

SHOWN ON X-805, THE POST-DREDGE SURVEY PERFORMED BY THE DREDGING

CONTRACTOR IN 2016. CONTOURS ARE IN FEET REFERENCED TO MLLW AND ARE

INDICATIVE OF CONDITIONS AT THE TIME OF THE SURVEY.

2. EXISTING FACILITIES (DOCKS, FLOATS, AND RAMPS) WITHIN AND IN THE VICINITY OF THE

HARBOR ARE SHOWN AS APPROXIMATE LOCATIONS AND NOT BASED ON SURVEY DATA.

AERIAL BACKGROUND PHOTO IS A DIGITALGLOBE GEO-REFERENCED IMAGE TAKEN ON

27 SEPTEMBER 2014.

3. THE DREDGED MATERIAL DISPOSAL AREA IN THE NUSHAGAK RIVER IS SUBJECT TO

STRONG CURRENTS THAT VARY WITH TIDAL FLUCTUATIONS AND FLOW IN THE RIVER.

THE DISPOSAL AREA IS ALSO SUBJECT TO HIGH WAVE ACTION DURING STRONG WINDS.

ALASKA DISTRICT

D R

A W

I N

G

F I L

E

D W

G

S

C A

L E

P L

A

L E

D A

T E

A C

T I O

N S

Y M

D R

A W

N

R E

S I D

E N

T

E

N G

I N

E E

R

D A

T E

S T

A T

E

P R

I M

E

C

O N

T R

A C

T O

R

D A

T E

D E

S C

R I P

T I O

N A

P P

D

C I T

Y

C O

N T

R A

C T

O R

C O

N T

R A

R E

C O

M M

E N

D E

D

A P

P R

O V

E D

S U

B M

I T

T E

D

D E

S I G

N E

D

R E

V I E

W E

D

O F

F I C

E

S

Y M

O F

F I C

E

S

Y M

U S

A

R M

Y

E

N G

I N

E E

R

D

I S

T R

I C

T

A N

C H

O R

A G

E

A

L A

S K

A

C O

R P

S

O

F

E

N G

I N

E E

R S

REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

C d s t s a v e d o n

A

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

A

P

N

O

W K

B B

O

C T

O B

IFB

H

A R

B O

R

M

A I N

T E

N A

N C

E

D

R E

D G

I N

G

D I L

L I N

G H

A M

A

L A

S K

A

ALASKA DISTRICT

D R

A W

I N

G

F I L

E

D W

G

S

C A

L E

P L

A

L E

D A

T E

A C

T I O

N S

Y M

D R

A W

N

R E

S I D

E N

T

E

N G

I N

E E

R

D A

T E

S T

A T

E

P R

I M

E

C

O N

T R

A C

T O

R

D A

T E

D E

S C

R I P

T I O

N A

P P

D

C I T

Y

C O

N T

R A

C T

O R

C O

N T

R A

R E

C O

M M

E N

D E

D

A P

P R

O V

E D

S U

B M

I T

T E

D

D E

S I G

N E

D

R E

V I E

W E

D

O F

F I C

E

S

Y M

O F

F I C

E

S

Y M

U S

A

R M

Y

E

N G

I N

E E

R

D

I S

T R

I C

T

A N

C H

O R

A G

E

A

L A

S K

A

C O

R P

S

O

F

E

N G

I N

E E

R S

REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

C d s t s a v e d o n

A

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

A

P

N

O

W K

B B

O

C T

O B

IFB

H

A R

B O

R

M

A I N

T E

N A

N C

E

D

R E

D G

I N

G

D I L

L I N

G H

A M

A

L A

S K

A

T

E D

C E

P O

A E

C G

D

B

L I S

S

E C

G

H

H

K

E

I S

S E

S

R E

K

R E

K

C I V

I L

D H

A

C

P L

A N

S

C-102

D R

E D

G E

D

M

A T

E R

I A

L

D

I S

P O

S A

L

S

I T

E

Feet

0 100 200

TYPICAL SECTION - ENTRANCE CHANNEL

AND MOORING BASIN

N.T.S.

STA 12+85 TO 20+50

NOTE

1. THE CONTRACTOR SHALL TAKE ALL APPROPRIATE PRECAUTIONS TO

AVOID ANY DISTURBANCE OF THE EXISTING SHEET PILE DOCKS, PILE

FLOAT SUPPORTS, LAUNCH RAMPS, PILES, AND ANY OTHER HARBOR

FACILITIES LOCATED WITHIN THE PROJECT VICINITY.

2. ALL DREDGING SHALL BE PERFORMED WITH A CUTTERHEAD DREDGE AS

REQUIRED BY SECTION 35 20 24.00 29 MAINTENANCE DREDGING

(PARAGRAPH 3.1 AND ASSOCIATED SUBPARAGRAPHS). SEE PLAN SHEET

C-101 FOR DREDGING LIMITS IN THE ENTRANCE CHANNEL AND MOORING

BASIN.

3. THE FLOAT SYSTEM IS REMOVED ANNUALLY BY THE CITY OF DILLINGHAM.

FLOATS WILL BE REMOVED AND STORED IN AN UPLAND SITE ADJACENT

TO THE HARBOR PRIOR TO THE CONTRACTOR CONDUCTING

PRE-DREDGE SURVEYING AND DREDGING.

4. THE CITY OF DILLINGHAM WILL COORDINATE AND ASSIST IN MOVING

VESSELS AND OTHER HARBOR FACILITIES TO ALLOW SURVEYING AND

DREDGING. THE CONTRACTOR SHALL COORDINATE WITH THE

HARBORMASTER PRIOR TO SURVEYING AND DREDGING.

5. DURING MAINTENANCE DREDGING, THE CONTRACTOR SHALL POSITION

THE CUTTERHEAD DREDGE AND DISCHARGE PIPE IN THE ENTRANCE

CHANNEL AND MOORING BASIN TO MINIMIZE CONFLICT WITH VESSEL

TRAFFIC AND HARBOR OPERATIONS. THE CONTRACTOR SHALL REMOVE

THE DREDGE, DISCHARGE PIPE, AND ASSOCIATED EQUIPMENT EACH

YEAR AFTER THE POST-DREDGE SURVEY HAS BEEN REVIEWED TO

VERIFY REQUIRED DEPTH HAS BEEN ACHIEVED.

6. THE "DREDGING PRISM" FOR THIS CONTRACT IS DEFINED AS THE

VOLUME OF MATERIAL TO BE DREDGED WITHIN THE DREDGING LIMITS,

SLOUGH ALLOWANCES, AND MAX. PAYLINE AS SHOWN ON THE TYPICAL

SECTION (THIS SHEET) AND AS REFERENCED IN SPECIFICATIONS

SECTION 01 22 00.00 10 PRICE AND PAYMENT PROCEDURES (PARAGRAPH

1.3.1 AND ASSOCIATED SUBPARAGRAPHS).

7. SLOUGH ALLOWANCE LIMITS SHOWN ARE HORIZONTAL DISTANCES

WITHIN THE SURVEY LIMITS FOR WHICH THE PAY LIMITS WILL BE THE

VOLUME OF MATERIAL WITHIN AND BETWEEN THE PRE-DREDGE AND

POST-DREDGE SURVEYS NOT TO EXCEED A 1V:8H SLOPE. THE

CONTRACTOR SHALL USE "BOX-CUT" METHODS BY POSITIONING THE

DREDGE CUTTERHEAD AT THE DREDGING LIMITS AND ALLOWING SIDE

SLOPE MATERIAL TO FALL TO THE CUTTERHEAD TO ACHIEVE REQUIRED

DEPTH.

8. THE CONTRACTOR SHALL TAKE SPECIAL PRECAUTIONS TO AVOID

UNDERMINING THE EXISTING RAMPS AT STATIONS 12+50 AND 20+75.

PRECISE EXTENT OF THE TOE OF EACH EXISTING RAMP IS UNKNOWN.

9. THE CONTRACTOR SHALL SEPARATE AND PROPERLY DISPOSE OF ALL

VISIBLY EVIDENT MAN-MADE MATERIAL AND OTHER DEBRIS

ENCOUNTERED DURING DREDGING ACTIVITIES.

REQUIRED DEPTH 0.0' MLLW

MAX. PAYLINE -2.0' MLLW

MATERIAL TO

BE DREDGED

SLOUGH

ALLOWANCE

SLOUGH

ALLOWANCE

VARIES

BASELINE

DREDGING LIMITS

WIDTH VARIES (SEE SHEET C-101)

NOTE: SIDE SLOPE TO

NATURAL ANGLE OF

REPOSE (NO FLATTER

THAN 1V:8H)

NOTE: SIDE SLOPE TO

NATURAL ANGLE OF

REPOSE (NO FLATTER

THAN 1V:8H)

ORIGINAL

GRADE

LEGEND

"DREDGING PRISM"

SIDE SLOPE REQUIREMENTS

SHOWN ALSO APPLY TO THE

NORTHERN AND SOUTHERN

BOUNDARIES OF THE DREDGING

LIMITS SHOWN ON SHEET C-101.

SURVEY LIMITS

ALASKA DISTRICT

D R

A W

I N

G

F I L

E

D W

G

S

C A

L E

P L

A

L E

D A

T E

A C

T I O

N S

Y M

D R

A W

N

R E

S I D

E N

T

E

N G

I N

E E

R

D A

T E

S T

A T

E

P R

I M

E

C

O N

T R

A C

T O

R

D A

T E

D E

S C

R I P

T I O

N A

P P

D

C I T

Y

C O

N T

R A

C T

O R

C O

N T

R A

R E

C O

M M

E N

D E

D

A P

P R

O V

E D

S U

B M

I T

T E

D

D E

S I G

N E

D

R E

V I E

W E

D

O F

F I C

E

S

Y M

O F

F I C

E

S

Y M

U S

A

R M

Y

E

N G

I N

E E

R

D

I S

T R

I C

T

A N

C H

O R

A G

E

A

L A

S K

A

C O

R P

S

O

F

E

N G

I N

E E

R S

REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

C d s t s a v e d o n

P

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

A

P

N

O

W K

B B

O

C T

O B

IFB

H

A R

B O

R

M

A I N

T E

N A

N C

E

D

R E

D G

I N

G

D I L

L I N

G H

A M

A

L A

S K

A

ALASKA DISTRICT

D R

A W

I N

G

F I L

E

D W

G

S

C A

L E

P L

A

L E

D A

T E

A C

T I O

N S

Y M

D R

A W

N

R E

S I D

E N

T

E

N G

I N

E E

R

D A

T E

S T

A T

E

P R

I M

E

C

O N

T R

A C

T O

R

D A

T E

D E

S C

R I P

T I O

N A

P P

D

C I T

Y

C O

N T

R A

C T

O R

C O

N T

R A

R E

C O

M M

E N

D E

D

A P

P R

O V

E D

S U

B M

I T

T E

D

D E

S I G

N E

D

R E

V I E

W E

D

O F

F I C

E

S

Y M

O F

F I C

E

S

Y M

U S

A

R M

Y

E

N G

I N

E E

R

D

I S

T R

I C

T

A N

C H

O R

A G

E

A

L A

S K

A

C O

R P

S

O

F

E

N G

I N

E E

R S

REFERENCE

NUMBER:

SHEET OF

US ARMY CORPS

OF ENGINEERS

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10 11 12

D r a w i n g x U

N I F

I E

D E

N C

W J o b s D

H A

D w g s C

A D

D

H A

C d s t s a v e d o n

P

M w a s p l o t t e d b y

K l o s t e r

R e b e c

A

D

I L

D H

A

P

N

O

W K

B B

O

C T

O B

IFB

H

A R

B O

R

M

A I N

T E

N A

N C

E

D

R E

D G

I N

G

D I L

L I N

G H

A M

A

L A

S K

A

T

E D

C E

P O

A E

C G

D

B

L I S

S

E C

G

H

H

K

E

I S

S E

S

R E

K

R E

K

C I V

I L

D H

A

C

S E

C T

I O

N S

C-301

T Y

P I C

C

T I O

N

AutoCAD SHX Text A

AutoCAD SHX Text C-101

C-301

Sheets and Views
G-001 COVER SHEET
G-101 LOCATION AND VICINITY MAP
C-101 SITE PLAN AND SURVEY CONTROL
LAYOUT1
C-102 DREDGED MATERIAL DISPOSAL SITE
LAYOUT1
C-301 TYPICAL SECTION
LAYOUT1

File details come from the government source that posted it. Updated .