B.08.02_-_DIL004_IFB_DWG_HalfSize.pdf

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Attached to: 2020-2022 MAINTENANCE DREDGING, DILLINGHAM HARBOR Federal contract opportunity
Solicitation number: W911KB20B0001
Issued by: Department of the Army Corps of Engineers Engineering District Alaska

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2020-2022 MAINTENANCE

DREDGING

W911KB20B0001

DILLINGHAM, ALASKA

476872

IFB, 09 OCTOBER 2019

Sheet G-001 Drawing # 5-DIL-91-01-07 Sheet 1 of 12

DIL004

US Army Corps of Engineers ® Alaska District

Sheet List Table

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 SURVEY CONTROL AND BASELINE

4 C-102 SURVEY AND DREDGE LIMITS

5 C-103 SURVEY AND DREDGE LIMITS

6 C-104 SURVEY AND DREDGE LIMITS

CIVIL: SECTIONS

7 C-301 DREDGE CROSS-SECTION

EXHIBIT

8 X-801 PRE-DREDGE SURVEY

9 X-802 PRE-DREDGE SURVEY

10 X-803 POST-DREDGE SURVEY

11 X-804 POST-DREDGE SURVEY

12 X-805 NUSHAGAK RIVER SURVEY

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.

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)

ELEVATION

(FT MLLW)

+20.6

+18.9

+10.8

+10.6

+2.3

0.0

TIDAL DATA, DILLINGHAM, ALASKA

9465374 SNAG POINT, DILLINGHAM, AK

SOURCE: NOAA NATIONAL OCEAN SERVICE

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

FAIRBANKS

ARCTIC OCEANCHUCKCHI SEA

LOCATION/VICINITY MAP(S)

JUNEAU

BERING SEA

ALEUTIAN ISLANDS

ATKA

GULF OF ALASKA

BRISTOL

BAY

NOME

KOTZEBUE

BARROW

ANCHORAGE

DILLINGHAM HARBOR

DILLINGHAM, ALASKA

D E

S C

R I P

T I O

D E

S I G

N E

U S

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P S

N G

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R S

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T R

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A L

A S

T R

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REFERENCE

NUMBER:

SHEET OF

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

J B

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L A

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C H

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US Army Corps of Engineers ® Alaska District

L I N

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A M

L A

S K

A I N

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N A

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D G

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IFB

W K

B B

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NOT FOR CONSTRUCTION

VERIFY SCALES: BAR IS ONE INCH

ON ORIGINAL DRAWING

0 1"

SOURCE:

INSET FROM NOAA CHART 16322

SOURCE:

GOOGLE EARTH

IMAGERY DATED JULY 16 2016

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

https://charts.noaa.gov/OnLineViewer/16322.shtml

DREDGING

LIMITS

MOORING

BASIN

ENTRANCE

CHANNEL

DREDGED MATERIAL

DISPOSAL SITE

NUSHAGAK RIVER

L O

C A

T I O

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A P

D A

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G E

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D I L G d w g

G-101

P L

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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

LOCATION

AutoCAD SHX Text

ROCK

AutoCAD SHX Text

SILL

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+00.00

N 1,841,500

N 1,841,250

N 1,841,000

N 1,840,750

N 1,840,500

N 1,840,250

N 1,840,000

N 1,840,250

N 1,840,500

N 1,840,750

N 1,841,000

N 1,841,250

N 1,841,500

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

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

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'.

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" (VM 18352 /

PID BBBF17) 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 / VM 18352) 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 US SURVEY FEET AND REFERENCED TO MEAN LOWER LOW WATER

(MLLW).

LEGEND: SURVEY MONUMENT

BASELINE DATA

STATION

10+00

23+00

NORTHING

1,840,346.59

1,841,637.42

EASTING

1,550,897.16

1,550,743.04

DESCRIPTION

BEGIN

END

200'0 100'

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US Army Corps

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DL-02

DL-01

SL-07

SL-06

SL-05

SL-04SL-03

SL-02

SL-01

E D

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L I M

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E D

L I M

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1277-1 1984

PICKEL 1998

WDS-2 2001

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+00.00

RIPRAP

D O

C K

HARBORMASTER OFFICE

I T

S U

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L I M

I T

MOORING BASIN

DREDGE TO 0.0' MLLW

(MAX PAYLINE -2.0' MLLW)

SEE SHEET C-104 FOR

DREDGED MATERIAL DISPOSAL

SITE IN THE NUSHAGAK RIVER

(THIS CONTRACT)

MATCH LINEMATCH LINE

N 1,841,000

N 1,841,250 N 1,841,250

N 1,841,500 N 1,841,500

N 1,841,000

SURVEY LIMITS

POINT NUMBER

SL-01

SL-02

SL-03

SL-04

SL-05

SL-06

SL-07

SL-08

SL-09

SL-10

SL-11

SL-12

SL-13

SL-14

SL-15

SL-16

SL-17

NORTHING

1,840,909.22

1,841,362.83

1,841,432.01

1,841,432.20

1,841,405.12

1,841,461.80

1,841,437.06

1,840,610.25

1,840,564.87

1,840,458.17

1,840,423.95

1,840,166.00

1,839,293.60

1,840,166.00

1,840,362.44

EASTING

1,550,207.01

1,550,065.66

1,550,133.89

1,550,396.29

1,550,578.98

1,550,593.75

1,550,688.69

1,550,787.66

1,550,408.42

1,550,413.54

1,550,449.36

1,550,808.47

1,551,455.40

1,550,359.57

1,550,272.21

DREDGING LIMITS

POINT NUMBER

DL-01

DL-02

DL-03

DL-04

DL-05

DL-06

DL-07

DL-08

DL-09

DL-10

DL-11

DL-12

NORTHING

1,840,930.19

1,841,318.54

1,841,364.89

1,840,669.87

1,840,645.10

1,840,656.89

1,840,653.73

1,840,531.77

1,840,377.05

1,840,535.05

1,840,662.40

EASTING

1,550,305.22

1,550,184.21

1,550,571.44

1,550,654.63

1,550,447.69

1,550,430.66

1,550,376.57

1,550,369.82

1,550,402.65

1,550,363.75

1,550,329.96

1,550,337.15

NOTES

1. 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 AUGUST 2016.

NOTE: SURVEY LIMITS REPEATED ON SHEET C-103 AND

C-104. DREDGE LIMITS REPEATED ON SHEET C-103.

0 100'50'

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AutoCAD SHX Text A

AutoCAD SHX Text C-102

C-301

DL-06

DL-05

DL-04

DL-01

DL-10 DL-09

DL-08

DL-07

SL-09

SL-08

SL-01

SL-17

SL-11

SL-16

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L I M

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1277-2 1984

1277-3 1984

DIL 1998

10+00.00

11+00.00

12+00.00

13+00.00

14+00.00

15+00.00

16+00.00

SHEETPILE

I N

ROCK SILL

(PARTIALLY REMOVED)

EXIST. CMP

(APPROX. LOCATION)

I K

ENTRANCE CHANNEL

DREDGE TO 0.0' MLLW

(MAX PAYLINE -2.0' MLLW)

SURVEY LIMITS

SL-12

SL-10

S U

V E

L I M

I T

S U

V E

Y L

S U

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L I M

I T

MOORING BASIN

DREDGE TO 0.0' MLLW

(MAX PAYLINE -2.0' MLLW)

PETER PAN PROPERTY

(OLD DISPOSAL SITE)

(NOT IN THIS CONTRACT)

MATCH LINEMATCH LINE

SEE SHEET C-104 FOR

DREDGED MATERIAL DISPOSAL

SITE IN THE NUSHAGAK RIVER

(THIS CONTRACT)

N 1,840,250

N 1,840,500 N 1,840,500

N 1,840,750

N 1,840,250

DL-11

DL-12

EXTENDED ENTRANCE

CHANNEL

DREDGE TO 8.0' MLLW

(MAX PAYLINE 7.0' MLLW)

NOTES

1. 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 AUGUST 2016.

NOTE: SURVEY LIMITS REPEATED ON SHEET C-102 AND

C-104. DREDGE LIMITS REPEATED ON SHEET C-102.

SURVEY LIMITS

POINT NUMBER

SL-01

SL-02

SL-03

SL-04

SL-05

SL-06

SL-07

SL-08

SL-09

SL-10

SL-11

SL-12

SL-13

SL-14

SL-15

SL-16

SL-17

NORTHING

1,840,909.22

1,841,362.83

1,841,432.01

1,841,432.20

1,841,405.12

1,841,461.80

1,841,437.06

1,840,610.25

1,840,564.87

1,840,458.17

1,840,423.95

1,840,166.00

1,839,293.60

1,840,166.00

1,840,362.44

EASTING

1,550,207.01

1,550,065.66

1,550,133.89

1,550,396.29

1,550,578.98

1,550,593.75

1,550,688.69

1,550,787.66

1,550,408.42

1,550,413.54

1,550,449.36

1,550,808.47

1,551,455.40

1,550,359.57

1,550,272.21

DREDGING LIMITS

POINT NUMBER

DL-01

DL-02

DL-03

DL-04

DL-05

DL-06

DL-07

DL-08

DL-09

DL-10

DL-11

DL-12

NORTHING

1,840,930.19

1,841,318.54

1,841,364.89

1,840,669.87

1,840,645.10

1,840,656.89

1,840,653.73

1,840,531.77

1,840,377.05

1,840,535.05

1,840,662.40

EASTING

1,550,305.22

1,550,184.21

1,550,571.44

1,550,654.63

1,550,447.69

1,550,430.66

1,550,376.57

1,550,369.82

1,550,402.65

1,550,363.75

1,550,329.96

1,550,337.15

NOTES

1. 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 AUGUST 2016.

0 100'50'

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AutoCAD SHX Text A

AutoCAD SHX Text C-102

AutoCAD SHX Text C-301

AutoCAD SHX Text B

AutoCAD SHX Text C-102

SL-14

SL-13SL-16

SL-15

DS-01

DS-02

DS-03

DS-04

DREDGED MATERIAL

DISPOSAL SITE

SURVEY LIMITS

S U

R V

I T

SL-12

SEE SHEET C-102 AND C-103

FOR HARBOR DREDGING SITE

MATCH LINEMATCH LINE

N 1,839,500 N 1,839,500

N 1,839,750 N 1,839,750

N 1,840,000

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 2019. CONTOURS ARE IN

FEET REFERENCED TO MLLW AND ARE INDICATIVE OF

CONDITIONS AT THE TIME OF THE SURVEY.

2. 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.

DREDGED MATERIAL (DISPOSAL SITE LIMITS)

POINT NUMBER

DS-01

DS-02

DS-03

DS-04

NORTHING

1,839,502.58

1,839,739.66

1,839,644.47

1,839,407.39

EASTING

1,551,238.87

1,551,159.55

1,550,875.05

1,550,954.38

NOTE: SURVEY LIMITS REPEATED ON SHEET C-102 AND

C-103.

SURVEY LIMITS

POINT NUMBER

SL-01

SL-02

SL-03

SL-04

SL-05

SL-06

SL-07

SL-08

SL-09

SL-10

SL-11

SL-12

SL-13

SL-14

SL-15

SL-16

SL-17

NORTHING

1,840,909.22

1,841,362.83

1,841,432.01

1,841,432.20

1,841,405.12

1,841,461.80

1,841,437.06

1,840,610.25

1,840,564.87

1,840,458.17

1,840,423.95

1,840,166.00

1,839,293.60

1,840,166.00

1,840,362.44

EASTING

1,550,207.01

1,550,065.66

1,550,133.89

1,550,396.29

1,550,578.98

1,550,593.75

1,550,688.69

1,550,787.66

1,550,408.42

1,550,413.54

1,550,449.36

1,550,808.47

1,551,455.40

1,550,359.57

1,550,272.21

0 100'50'

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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-102 THROUGH C-103 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 AS DESCRIBED IN

SECTION 35 20 24.00 29 MAINTENANCE DREDGING (PARAGRAPH

CHARACTER OF MATERIALS).

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-102 THROUGH C-103)

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-102 THROUGH C-103.

SURVEY LIMITS

TYPICAL SECTION - EXTENDED ENTRANCE CHANNEL

N.T.S.

STA 10+89 TO 12+48

REQUIRED DEPTH 8.0' MLLW

MAX. PAYLINE 7.0' MLLW

MATERIAL TO

BE DREDGED

SLOUGH

ALLOWANCE

SLOUGH

ALLOWANCE

VARIES

BASELINE

DREDGING LIMITS

WIDTH APPROXIMATELY 38'

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

SIDE SLOPE REQUIREMENTS SHOWN

ALSO APPLY TO THE SOUTHERN

BOUNDARY OF THE DREDGING LIMITS

SHOWN ON SHEET C-101.

SURVEY LIMITS

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C-301

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AutoCAD SHX Text A

AutoCAD SHX Text C-102

AutoCAD SHX Text C-301

AutoCAD SHX Text B

AutoCAD SHX Text C-102 r a w i n g

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5-DIL-91-01-07, W911KB20B0001, Sheet 8 of 12

PRE-DREDGE SURVEY, DIL004-X-801.dwg

EXHIBIT X-801

DIL004 IFB 09 OCTOBER 2019

NOT TO SCALE

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5-DIL-91-01-07, W911KB20B0001, Sheet 9 of 12

PRE-DREDGE SURVEY, DIL004-X-802.dwg

EXHIBIT X-802

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5-DIL-91-01-07, W911KB20B0001, Sheet 10 of 12

POST-DREDGE SURVEY, DIL004-X-803.dwg

EXHIBIT X-803

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5-DIL-91-01-07, W911KB20B0001, Sheet 11 of 12

POST-DREDGE SURVEY, DIL004-X-804.dwg

EXHIBIT X-804

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5-DIL-91-01-07, W911KB20B0001, Sheet 12 of 12

NUSHAGAK RIVER SURVEY, DIL004-X-805.dwg

EXHIBIT X-805

Sheets and Views

G-001 COVER SHEET

G-101 LOCATION AND VICINITY MAP

C-101 SURVEY CONTROL AND BASELINE

CONTROL PLAN

C-102 SURVEY AND DREDGE LIMITS

C-103 SURVEY AND DREDGE LIMITS

C-104 SURVEY AND DREDGE LIMITS

C-301 DREDGE CROSS-SECTION

X-801 PRE-DREDGE SURVEY

X-802 PRE-DREDGE SURVEY

X-803 POST-DREDGE SURVEY

X-804 POST-DREDGE SURVEY

X-805 NUSHAGAK RIVER SURVEY

File details come from the government source that posted it.