Plans_March2019.pdf

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®of Engineers

US Army Corps

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NORTH CHANNEL

35-FOOT BROAD SOUND

SOUTH CHANNEL

30-FOOT BROAD SOUND

15-FOOT NUBBLE CHANNEL

35-FOOT ANCHORAGE

WINTHROP

BOSTON

EAST

BOSTON

SOUTH

BROAD SOUND

DORCHESTER BAY

ISLAND

DEER

ISLAND

CASTLE

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AIRPORT

INTERNATIONAL

LOGAN

1. SOUNDINGS ARE IN FEET AND TENTHS. THE REFERENCE PLANE IS MEAN

LOWER LOW WATER (MLLW) AND IS BASED ON THE 1983-2001 TIDAL EPOCH.

SOUNDINGS NOTED WITH A (+) ARE ABOVE THE REFERENCE PLANE OF MLLW.

SOUNDINGS WITHOUT A SIGN ARE BELOW THE REFERENCE PLANE OF MLLW,

AND SHOULD BE CONSIDERED NEGATIVE.

2. TOPOGRAPHY SHOWN IS FROM PREVIOUS SURVEYS, AERIAL IMAGERY

AND/OR NOAA CHART NO. 13270 & 13272. ALL TOPOGRAPHY, INCLUDING

SHORELINE, BRIDGES, PIERS, ETC., IS LOCATED APPROXIMATE UNLESS

OTHERWISE NOTED AND SHOULD BE USED AS A GENERAL REFERENCE

ONLY.

3. BENCH MARK DATA: TIDES WERE RECORDED USING RTK GPS.

THE MLLW TO NAVD88 CORRECTION FOR THIS PROJECT IS 5.30 FEET FOR THE

NORTH AND SOUTH BROAD SOUND CHANNELS AND 5.51 FEET FOR ALL OTHER

PORTIONS OF THIS PROJECT. THE CORRECTION FOR BROAD SOUND IS

REFERENCED FROM NOAA'S V-DATUM MODEL IN THE VICINITY OF BOSTON

HARBOR, MASSACHUSETTS. THE CORRECTION FOR THE UPSTREAM PORTIONS

OF THE PROJECT IS PUBLISHED BY NOAA FOR BENCH MARKS AT BOSTON, BOSTON

HARBOR, MASSACHUSETTS (STATION ID 8443970, 4/21/2003).

NAVD88 IS ABOVE MLLW; THEREFORE THE CORRECTION SHOULD BE ADDED TO

NAVD88 TO CONVERT TO MLLW.

NO TIDE GAUGES WERE USED ON THIS PROJECT.

THE AVERAGE RANGE OF TIDE IS 9.5 FEET.

4. COORDINATES SHOWN ARE BASED ON THE LAMBERT GRID SYSTEM FOR

THE COMMONWEALTH OF MASSACHUSETTS (MAINLAND ZONE 2001), NAD 1983

AND ARE BASED ON U.S. SURVEY FEET.

5. SURVEYS WERE PERFORMED USING A RESON 7125 MULTIBEAM SONAR SYSTEM

OPERATING AT 400 KHZ. HORIZONTAL POSITIONING AND REAL TIME TIDE READINGS

WERE RECORDED UTILIZING A TRIMBLE SPS 855 RTK GPS SYSTEM.

THE RTK BASE STATIONS USED WERE STATION CASTLE (2014), STATION E-25 AND

STATION PIER (2014).

6. THE SOUNDING INFORMATION SHOWN ON THESE MAPS REPRESENTS

THE SHOALEST SOUNDINGS OF THOSE OBTAINED FROM HYDROGRAPHIC

SURVEYS CONDUCTED AUGUST THROUGH NOVEMBER 2014 AND DECEMBER 2017.

7. THE INFORMATION DEPICTED ON THESE MAPS REPRESENTS THE RESULTS OF

SURVEYS MADE ON THE DATES INDICATED, AND CAN ONLY BE CONSIDERED AS

INDICATING THE CONDITIONS EXISTING AT THAT TIME.

35-FOOT DEPTH CONTOUR SHOWN THUS:

30-FOOT DEPTH CONTOUR SHOWN THUS:

15-FOOT DEPTH CONTOUR SHOWN THUS:

SURVEYED BY: ADRIEN LUSSIER, BENJAMIN FORD AND CREWS

GENERAL NOTES:

MAIN SHIP CHANNEL CAD CELL

C-101

C-102

C-103

C-104

C-105

C-106

C-107

C-108

# EASTING NORTHING

C-109

THE DATA DEPICTED ON THESE MAPS SHOULD NOT BE USED FOR VOLUME

CALCULATION PURPOSES.

SHIP CHANNEL

35-FOOT MAIN

31 783587.90 2954357.38

30 781979.79 2955312.51

29 782259.81 2954541.80

28 782431.72 2954346.23

27 783339.65 2953806.97

26 785946.85 2952933.33

25 785831.01 2953025.09

24 783674.59 2954305.89

23 783426.35 2953755.48

22 785490.01 2952529.77

21 785574.30 2952463.00

20 791743.23 2948084.86

19 793921.63 2947332.96

18 795954.30 2947381.36

17 796099.90 2947417.68

16 796851.86 2948206.32

15 805484.93 2945218.88

14 805229.92 2945748.88

13 804959.58 2945618.81

12 805214.59 2945088.81

11 816524.87 2956687.28

10 813085.22 2951771.14

9 808440.51 2950101.52

8 807622.36 2948532.24

7 813849.90 2950770.84

6 817508.10 2955999.35

5 811184.47 2958745.57

4 806641.28 2950031.40

3 807374.49 2950742.90

2 808535.68 2952470.96

1 812225.14 2959547.63

8.

ANCH-1ANCH-2

NUB-1

BSN-1

BSN-2

BSN-4

BSN-3

BSS-7

BSS-6

BSS-5

BSS-3

BSS-4

BSS-2

BSS-1

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EBB

pw://COE-NAEPWP01CON.nae.ds.usace.army.mil:coe-naepwp01con.nae.ds.usace.army.mil/Documents/Civil Works/Navigation/MA/Boston Harbor/Maintenance Dredging FY19/30000 - Planning & Engineering & Design/30DA0 - Plans & Specs/CAD_BIM/_Sheets/BOS_SP_2019_001_G-10

12:20:10 PM 3/14/2019 PD: AEC_pdf.pltcfgDS: AEC_Screen_Color.dscript.dscript

DESCRIPTION SYMBOL

LEGEND

L J

A C

O B

S

A N

S I

D

G-101

G E

N E

R A

L P

L A

N

:1

A

B A

R N

E S

A1

GENERAL SITE PLAN

0 4000'2000'

N

SCALE: 1" = 2000'

PROJECT LIMITS

FEDERAL NAVIGATION

NUB - 1

BSS - 7

BSS - 6

BSS - 5

BSS - 4

BSS - 3

BSS - 2

BSS - 1

BSN - 4

BSN - 3

BSN - 2

BSN - 1

ANCH - 2

ANCH - 1

SEDIMENT SAMPLE LOCATIONS

805,436.76 2,945,523.71

809,215.29 2,950,235.78

810,006.57 2,950,608.02

812,606.43 2,951,581.78

813,595.57 2,952,456.96

813,989.90 2,952,982.61

814,581.90 2,953,731.21

814,879.28 2,954,276.26

807,817.32 2,952,244.39

808,404.03 2,953,418.81

809,007.66 2,954,476.74

809,222.34 2,954,956.30

792,353.65 2,947,933.62

794,151.39 2,948,116.31

IDENTIFIER EASTING NORTHING

M A

R C

H

B S

P R

A G

U E

L T

H

IB

O D

E A

U

SEDIMENT SAMPLING LOCATION

COMMUNICATION UTILITY LINE

SANITARY SEWER LINE

OPTIONAL AREAS

NAVIGATIONAL AIDS

NO SPUD ZONE

DREDGED

MATERIAL REQUIRED TO BE

BASELINE / CENTERLINE

DREDGE LIMIT COORDINATES

PROJECT DREDGING LIMITS

FOR MORE INFORMATION

REFER TO SHEET C-108

OPTIONAL ITEMS: