W912DS25BA019 Lake Montauk Harbor Channel plans RTA.pdf
PDF 15 MB Posted
- Attached to
- LAKE MONTAUK HARBOR (LMH)
- Solicitation number
- W912DS25BA019
About this file
These are detailed engineering and design plans for the Lake Montauk Harbor Navigation Improvement Project prepared by the U.S. Army Corps of Engineers New York District. The project involves deepening the existing navigation channel from -12 feet to -17 feet Mean Lower Low Water (MLLW), with a 2-foot paid overdredge tolerance. A new 100-foot wide deposition basin will be constructed east of the channel. The dredging project will remove approximately 100,000 cubic yards of sand and 15,000 cubic yards of hard material (cobbles, rock, and boulders), with hard materials to be transported to Mattituck Reef, a state artificial reef site.
The project documents include nine technical sheets showing general plans, dredging boundaries, channel profiles, cross-sections, and placement areas for dredged materials. Specific environmental considerations include maintaining a buffer around submerged aquatic vegetation between April 15 and October 15, with a 250-foot buffer for areas with 95% sand. The dredging window is limited to October through December 2025, excluding mobilization and demobilization periods. The project is located in East Hampton, Suffolk County, New York, with an estimated cost between $5 million and $10 million, and is classified as an unrestricted procurement.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| Bid Abstract.pdf | ||
| Amendment 0003.pdf | ||
| Amendment 0002.pdf | ||
| Amnedment 0001_USACE calc LMH monthly 2025 (31 Jul 25) (2).xlsx | XLSX spreadsheet | |
| Amendment 0001_USACE_LakeMontaukHarbor_MOD1_LetterReport_20230612_1200 e4.pdf | ||
| Amendment 0001.pdf | ||
| Amnedment 0001_USACE calc LMH monthly 2026 (31 Jul 25) (2).xlsx | XLSX spreadsheet | |
| XYZ.zip | ZIP file | |
| W912DS-25-B-A019.pdf | ||
| W912DS25BA019 LAKE MONTAUK HARBOR SPECS_RTA_07-23-2025.pdf |
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SOLICITATION NO.:
CONTRACT NO.:
ISSUE DATE:
NEW YORK DISTRICT
LAKE MONTAUK HARBOR
NAVIGATION IMPROVEMENT PROJECT
TOWN OF EAST HAMPTON, NY
W912DS 25 B A019
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US Army Corps of Engineers ®
DATE
DATE
APPROVED:
This project was designed by the New York District of the U.S. Army Corps of Engineers.
The initials or signatures and registration designations of individuals appear on these project documents, within the scope of their employment as required by ER 1110-1-8152.
STAN SEDWICK, P.E.
SUBMITTED:
ENCER R. SHAFFER, P.E.
CHIEF, DESIGN BRANCH
CHIEF, ENGINEERING DIVISION
LAKE MONTAUK
HARBOR CHANNEL
INDEX TO DRAWINGS
G-001 COVER SHEET AND INDEX TO DRAWINGS 1 OF 9
G-101 GENERAL PLAN 2 OF 9
G-102 GENERAL PLAN FOR CHANNEL 3 OF 9
C-101 DREDGING PLAN 4 OF 9
C-102 PLACEMENT OF DREDGED MATERIAL
PLAN 5 OF 9
C-103 MATTITUCK REEF DISPOSAL AREA PLAN 6 OF 9
C-201 CHANNEL PROFILE 7 OF 9
C-301 CHANNEL CROSS SECTIONS 8 OF 9
C-302 PLACEMENT OF DREDGED MATERIAL
CROSS SECTIONS 9 OF 9
+1
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N 339,000
E 1, 3, E 1, 4, E 1, 5, N 338,000
N 337,000
E 1, 3, E 1, 4, E 1, 5, N 338,000
N 337,000
N 339,000
NOTES:
1. DREDGE IN NAVIGATION CHANNEL, INCLUDING REMOVAL
OF HARD MATERIAL, TO AN AUTHORIZED DEPTH OF -17 FT
MLLW WITH 2.0 FT OF ALLOWABLE PAID OVERDREDGE.
2. REMOVE MATERIAL FROM THE DEPOSITION BASIN TO 17'
BELOW MLLW OR REFUSAL, WHICHEVER COMES FIRST.
3. PER NMFS EFH RECOMMENDATION, MAINTAIN A BUFFER
BETWEEN THE DREDGING AREA AND THE SUBMERGED
AQUATIC VEGETATION BED BETWEEN APRIL 15 AND
OCTOBER 15 EACH YEAR. FOR AREAS WITH 95% SAND, THE
BUFFER SHOULD BE 250 FT.
4. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS
THE RESULTS OF A SURVEY PERFORMED BY THE USACE
NEW YORK SURVEY SECTION FROM 14 JAN 2025 TO 16 JAN
2025 AND SHOULD ONLY BE CONSIDERED AS THE GENERAL
CONDITIONS EXISTING AT THAT TIME.
5. THE PLANIMETRICS DEPICTED ON THIS MAP ARE FOR
ORIENTATION PURPOSES ONLY.
6. COORDINATES REFER TO THE US STATE PLANE
COORDINATE SYSTEM NAD 1983, LONG ISLAND LAMBERT -
ZONE 3104, US SURVEY FEET.
7. CONTOURS IN THIS PLAN SET ARE REFERENCED TO MEAN
LOWER LOW WATER.
8. MEAN LOWER LOW WATER IS 1.5 FT BELOW NAVD88 AS
DETERMINED USING VDATUM (VER. 4.1). MEAN LOW WATER
IS 1.4 FT BELOW NAVD88. MEAN HIGH WATER IS 0.6 FT
ABOVE NAVD88. THIS IS COMPREHENSIVE EVALUATION OF
PROJECT DATUMS (CEPD) COMPLIANT.
9. CONTOUR DATA IN THIS PLAN SET WAS COLLECTED USING
PROJECT CLASSIFICATION SOFTWARE AS SPECIFIED IN EM
1110-2-1003.
10. CONTOURS DEPICTED IN THIS PLAN SET SHOULD NOT BE
USED FOR VOLUME CALCULATION PURPOSES.
11. AERIAL IMAGERY PROVIDED BY NEW YORK GIS
CLEARINGHOUSE, DATED 2020.
12. THE SURVEY WAS PERFORMED USING REAL TIME
KINEMATIC GPS FROM STATION "851 0448 A".
13. SEE SHEET G-102 FOR REFERENCE LINE DATA AND
CHANNEL BOUNDARY COORDINATES.
14. SEE SHEET C-301 FOR CROSS SECTIONS.
N
CHANNEL REFERENCE LINE
DREDGING BOUNDARY
PROPOSED STAGING AREA
PLACEMENT AREA OF DREDGED MATERIAL
N
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BASIN
E1 ,5
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E
1, 2, N 336,000 N 336,000
SUBMERGED AQUATIC VEGETATION
LOCAL CONTROL DATA
BENCHMARK: COAST MONTAUK
ELEVATION: 8.10' (NAVD88)
NSRS BENCHMARK
BENCHMARK: 851 0448 A
ELEVATION: 6.94' (NAVD88)
400'0 200'
SUBMERGED AQUATIC VEGETATION
33+18.93
0+001+002+003+004+005+006+007+008+009+0010+0011+0012+0013+0014+0015+0016+00
17+00
18+00
19+00
20+00
21+00
22+00
23+00
24+00
25+00
26+00
27+00
28+00
29+00
30+00
31+00
32+00
33+00
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E 1,554,000
NOTES:
1. DREDGE IN NAVIGATION CHANNEL, INCLUDING REMOVAL
OF HARD MATERIAL, TO AN AUTHORIZED DEPTH OF -17 FT
MLLW WITH 2.0 FT OF ALLOWABLE PAID OVERDREDGE.
2. REMOVE MATERIAL FROM THE DEPOSITION BASIN TO 17'
BELOW MLLW OR REFUSAL, WHICHEVER COMES FIRST.
3. PER NMFS EFH RECOMMENDATION, MAINTAIN A BUFFER
BETWEEN THE DREDGING AREA AND THE SUBMERGED
AQUATIC VEGETATION BED BETWEEN APRIL 15 AND
OCTOBER 15 EACH YEAR. FOR AREAS WITH 95% SAND, THE
BUFFER SHOULD BE 250 FT.
4. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS
THE RESULTS OF A SURVEY PERFORMED BY THE USACE
NEW YORK SURVEY SECTION FROM 14 JAN 2025 TO 16 JAN
2025 AND SHOULD ONLY BE CONSIDERED AS THE GENERAL
CONDITIONS EXISTING AT THAT TIME.
5. THE PLANIMETRICS DEPICTED ON THIS MAP ARE FOR
ORIENTATION PURPOSES ONLY.
6. COORDINATES REFER TO THE US STATE PLANE
COORDINATE SYSTEM NAD 1983, LONG ISLAND LAMBERT -
ZONE 3104, US SURVEY FEET.
7. CONTOURS IN THIS PLAN SET ARE REFERENCED TO MEAN
LOWER LOW WATER.
8. MEAN LOWER LOW WATER IS 1.5 FT BELOW NAVD88 AS
DETERMINED USING VDATUM (VER. 4.1). MEAN LOW WATER
IS 1.4 FT BELOW NAVD88. MEAN HIGH WATER IS 0.6 FT
ABOVE NAVD88. THIS IS COMPREHENSIVE EVALUATION OF
PROJECT DATUMS (CEPD) COMPLIANT.
9. CONTOUR DATA IN THIS PLAN SET WAS COLLECTED USING
PROJECT CLASSIFICATION SOFTWARE AS SPECIFIED IN EM
1110-2-1003.
10. CONTOURS DEPICTED IN THIS PLAN SET SHOULD NOT BE
USED FOR VOLUME CALCULATION PURPOSES.
11. AERIAL IMAGERY PROVIDED BY NEW YORK GIS
CLEARINGHOUSE, DATED 2020.
12. THE SURVEY WAS PERFORMED USING REAL TIME
KINEMATIC GPS FROM STATION "851 0448 A".
13. SEE SHEET G-102 FOR REFERENCE LINE DATA AND
CHANNEL BOUNDARY COORDINATES.
14. SEE SHEET C-301 FOR CROSS SECTIONS.
LAKE MONTAUK HARBOR
CHANNEL COORDINATES
POINT NORTHING EASTING
1 339,322.57 1,552,499.72
2 337,772.57 1,552,871.75
3 337,440.57 1,553,201.76
4 336,861.58 1,554,392.78
5 336,996.49 1,554,458.37
6 337,564.35 1,553,290.21
7 337,848.48 1,553,007.79
8 337,996.24 1,552,972.32
9 339,357.57 1,552,645.58
DETENTION BASIN COORDINATES
8 337,996.24 1,552,972.32
9 339,357.57 1,552,645.58
10 339,380.91 1,552,742.82
11 338,116.81 1,553,046.22
150'
150'
DREDGING BOUNDARY
REFERENCE LINE
LAKE MONTAUK HARBOR CHANNEL REFERENCE LINE DATA
POINT STATION NORTHING EASTING COURSE DISTANCE BEARING
1 0+00.00 339,340.07 1,552,572.65 1-2 1,572.99' S13° 29' 47.50"E 2 15+72.99 337,810.52 1,552,939.77 2-3 434.36' S44° 49' 40.59"E 3 20+07.35 337,502.46 1,553,245.98 3-4 1,311.58' S64° 04' 28.18"E 4 33+18.93 336,929.03 1,554,425.57 - - -
PROPOSED STAGING AREA
150' 100'
VAR
IES
150'
NAVIGATION CHANNEL
DEPOSITION BASIN
SUBMERGED AQUATIC
VEGETATION LOCAL CONTROL DATA
BENCHMARK: COAST MONTAUK
ELEVATION: 8.10' (NAVD88)
NSRS BENCHMARK
BENCHMARK: 851 0448 A
ELEVATION: 6.94' (NAVD88)
KNOWN ROCK
LOCATIONS
(2018)
100' 200'0
-1
-1
-17
-1
-12
-10 -8
-1
-10
-17
-19
33+18.93
0+001+002+003+004+005+006+007+008+009+0010+0011+0012+0013+0014+0015+0016+00
17+00
18+00
19+00
20+00
21+00
22+00
23+00
24+00
25+00
26+00
27+00
28+00
29+00
30+00
31+00
32+00
33+00
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N
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N
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N
,0
E 1,553,000
E 1,554,000
NOTES:
1. DREDGE IN NAVIGATION CHANNEL, INCLUDING REMOVAL
OF HARD MATERIAL, TO AN AUTHORIZED DEPTH OF -17 FT
MLLW WITH 2.0 FT OF ALLOWABLE PAID OVERDREDGE.
2. REMOVE MATERIAL FROM THE DEPOSITION BASIN TO 17'
BELOW MLLW OR REFUSAL, WHICHEVER COMES FIRST.
3. PER NMFS EFH RECOMMENDATION, MAINTAIN A BUFFER
BETWEEN THE DREDGING AREA AND THE SUBMERGED
AQUATIC VEGETATION BED BETWEEN APRIL 15 AND
OCTOBER 15 EACH YEAR. FOR AREAS WITH 95% SAND, THE
BUFFER SHOULD BE 250 FT.
4. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS
THE RESULTS OF A SURVEY PERFORMED BY THE USACE
NEW YORK SURVEY SECTION FROM 14 JAN 2025 TO 16 JAN
2025 AND SHOULD ONLY BE CONSIDERED AS THE GENERAL
CONDITIONS EXISTING AT THAT TIME.
5. THE PLANIMETRICS DEPICTED ON THIS MAP ARE FOR
ORIENTATION PURPOSES ONLY.
6. COORDINATES REFER TO THE US STATE PLANE
COORDINATE SYSTEM NAD 1983, LONG ISLAND LAMBERT -
ZONE 3104, US SURVEY FEET.
7. CONTOURS IN THIS PLAN SET ARE REFERENCED TO MEAN
LOWER LOW WATER.
8. MEAN LOWER LOW WATER IS 1.5 FT BELOW NAVD88 AS
DETERMINED USING VDATUM (VER. 4.1). MEAN LOW WATER
IS 1.4 FT BELOW NAVD88. MEAN HIGH WATER IS 0.6 FT
ABOVE NAVD88. THIS IS COMPREHENSIVE EVALUATION OF
PROJECT DATUMS (CEPD) COMPLIANT.
9. CONTOUR DATA IN THIS PLAN SET WAS COLLECTED USING
PROJECT CLASSIFICATION SOFTWARE AS SPECIFIED IN EM
1110-2-1003.
10. CONTOURS DEPICTED IN THIS PLAN SET SHOULD NOT BE
USED FOR VOLUME CALCULATION PURPOSES.
11. AERIAL IMAGERY PROVIDED BY NEW YORK GIS
CLEARINGHOUSE, DATED 2020.
12. THE SURVEY WAS PERFORMED USING REAL TIME
KINEMATIC GPS FROM STATION "851 0448 A".
13. SEE SHEET G-102 FOR REFERENCE LINE DATA AND
CHANNEL BOUNDARY COORDINATES.
14. SEE SHEET C-301 FOR CROSS SECTIONS.
REFERENCE LINE
DREDGING BOUNDARY
TOP OF 1:3 SLOPE (typ)
CROSS SECTIONS
250' @
EL. -17'
150' @ EL. -17'
WEST JETTY LIGHT
EAST JETTY LIGHT
NAVIGATION CHANNEL
DEPOSITION BASIN
START 1:1.5 SLOPE
AT STA 27+00
TOP OF 1:3 SLOPE (typ)
END 1:1.5 SLOPE
AT STA 30+75
LOCAL CONTROL DATA
BENCHMARK: COAST MONTAUK
ELEVATION: 8.10' (NAVD88)
NSRS BENCHMARK
BENCHMARK: 851 0448 A
ELEVATION: 6.94' (NAVD88)
100' 200'0
N
TOP OF 1:3 SLOPE (typ)
-14
-12
-12
-10
-10
-10
-8
-8
-8
-6
-6
-6
-4
-4
-4
-2
-2
-2
-6 MLLW
-6 MLLW
-6 MLLW
ST
A.
1+
ST
A.
ST
A.
ST
A.
ST
A.
ST
A.
ST
A.
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A.
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A.
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A.10
ST
A.
ST
A.
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A.
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A.
C /E
C /E
C /E
C /E
C/E
C/E
C/E
C/E
C/E
C/E C/E C/E C/E C/E C/E C/E C/E C
/E
C/E C/E C/E
C /E
C/E
C /E
C /E
C /E
C /E
C /E
C /E
C /E
SL
O
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1:
BERM @ ELEV. 8.0'
APPROXIMATE TOE
OF 1:15 SLOPE
N 338000
E
WEST LAKE DRIVE
STAGING AREA
WORKING LIMITS
WORKING LIMITS
SL
O
PE
1:
BERM @ ELEV. 8.0'
E
0 N 338000
E
N 338000
W
EST LAKE D
R
IVE
REFERENCE LINE
TAPER TO EXISTING
N 338345.05 E 1552582.88
N 337801.36 E 1551600.03
TAPER TO EXISTING
N 338149.98 E 1552145.38
N 337881.38 E 1551725.38
SUBMERGED
AQUATIC
VEGETATION
BEDS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
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D
E
F
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D B
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C H
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D B
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D R
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B Y:
D
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N
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B
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C O
N
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SHEET ID
US Army Corps of Engineers
U .S
. A R
M Y
C O
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PS
O F
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IN
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R S
S.
R
E.
G
E.
G
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G
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D R
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G
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M
AT
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IA
L
PL
AN
S H
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C-102
SCALE:1"=60'
NOTES:
1. COORDINATES REFER TO US STATE PLANE COORDINATE SYSTEM NAD 1983,
LONG ISLAND LAMBERT - ZONE 3104, US SURVEY FEET
2. CONTOURS AND ELEVATIONS ON THIS SHEET ARE IN FEET AND REFERENCED TO
NORTH AMERICAN VERTICAL DATUM 1988 (NAVD88) AS DETERMINED USING
VDATUM VERSION 4.6.1. THE -6 MLLW CONTOUR IS DISPLAYED FOR
ENVIRONMENTAL REQUIREMENTS.
· MEAN LOWER LOW WATER IS 1.5 FEET BELOW NAVD88
· MEAN LOW WATER IS 1.4 FEET BELOW NAVD88
· MEAN HIGH WATER IS 0.6 FEET BELOW NAVD88
3. THE DATA DEPICTED ON THIS MAP SHOULD NOT BE USED FOR VOLUME
CALCULATIONS PURPOSES.
4. AERIAL IMAGERY PROVIDED BY USACE NEW YORK DISTRICT SURVEYS AND
MAPPING BRANCH (2025) AND IS ORIENTATION PURPOSES ONLY.
5. THE PLANIMETRICS DEPICTED ON THIS MAP ARE FOR ORIENTATION PURPOSES
ONLY.
6. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS THE RESULTS OF
SURVEYS MADE ON JANUARY 2025 AND CAN ONLY BE CONSIDERED AS THE
GENERAL CONDITIONS EXISTING AT THAT TIME.
7. FOR COVER SHEET AND INDEX TO DRAWINGS SEE SHEET G-001.
8. FOR GENERAL PLAN, GENERAL NOTES, AND DREDGING BOUNDS SEE SHEET G-101
9. FOR CROSS SECTIONS SEE SHEET C-302
10. REMOVE & DISPOSE MISCELLANEOUS DEBRIS WITHIN BEACH FILL AREAS PRIOR
TO PLACEMENT OF DREDGED MATERIALS
11. PER NMFS EFH RECOMMENDATION, MAINTAIN A BUFFER AROUND THE
SUBMERGED AQUATIC VEGETATION (SAV) BEDS BETWEEN APRIL 15 AND
OCTOBER 15 EACH YEAR. FOR AREAS WITH 95% SAND, THE BUFFER SHOULD BE
250 FT.
12. PER NYSDEC WQC ALL DREDGE MATERIAL PLACE BETWEEN OCTOBER 16 AND
APRIL 14, INCLUSIVE, OF ANY CALENDAR YEAR, MUST BE DEPOSITED SO THAT
THE TOE OF THE SLOPE EXTENDS NO CLOSER THAN 25 LINEAR FEET FROM ANY
MAPPED SAV BEDS.
SAND PLACEMENT REFERENCE LINE ALIGNMENT DATA TABLE
PI STATION NORTHING EASTING DISTANCE DIRECTION
0+00.00 338,096.56' 1,552,665.58'
401.01' S70° 35' 14.58"W 4+01.01 337,963.28' 1,552,287.37'
806.15' S70° 35' 13.58"W
12+07.16 337,695.33' 1,551,527.05'
N
EW
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+X
XX
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4.
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+X
XX
XX
X-
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-X
-X
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60' 120'0
© 2024 Microsoft Corporation Earthstar Geographics SIO © 2023 TomTom
N 328063.64 E 1377629.27
N 328033.52 E 1379133.02
N 326588.13 E 1377648.70
N 326581.55 E 1379106.18
MATTITUCK
ARTIFICIAL REEF
LAKE MONTAUK
HARBOR
APX. 35 MILES
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
E
F
G
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K
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M
N
P
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BM
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D B
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C H
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D B
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D R
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D
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+X
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-X
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C-103
SCALE:1"=6000'
NOTES:
1. FOR COVER SHEET AND INDEX TO DRAWINGS SEE SHEET G-001.
2. MATTITUCK REEF DETAILS ARE TO BE PROVIDED TO THE CONTRACTOR
WITHIN THE NEW YORK STATE DEPARTMENT OF ENVIRONMENTAL
CONSERVATION (NYSDEC) WATER QUALITY CERTIFICATE (WQC)
ATTACHED TO THE CONTRACT SPECIFICATIONS
Feet 0 6000 12000
LAKE MONTAUK HARBOR
PROFILE ALONG REFERENCE LINE
-25
-20
-10
-25
-20
-10
0+
1+
2+
3+
4+
5+
6+
7+
8+
9+
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
C
D
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F
G
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K
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M
N
P
SU
BM
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D B
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C H
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D B
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D R
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N
B Y:
D
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N
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B
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C O
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SI
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C R
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SHEET ID
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
BK
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US Army Corps of Engineers
U .S
. A R
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C O
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N
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Y O
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F
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LA
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N
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2D S
B
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LA
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M O
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BM
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SI
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NOTES:
1. THE VERTICAL IS SCALED 5 TIMES.
2. CROSS SECTION UNITS ARE SHOWN IN FEET.
3. MEAN LOWER LOW WATER IS 1.5 FT BELOW NAVD88. MEAN LOW
WATER IS 1.4 FT BELOW NAVD88. MEAN HIGH WATER IS 0.6 FT ABOVE
NAVD88.
4. THE PLANE OF MEAN LOWER LOW WATER WAS DERIVED USING
VDATUM. THIS IS CEPD COMPLIANT.
PROPOSED DREDGING
DEPTH (-17.0', typical)
2' MAX. PAID OVERDREDGE
TOLERANCE (typical)
MLLW -1.5'
MHW 0.6'
EXISTING SURVEY DEPTH
(January 2025)
SCALE: 1H=100'
SCALE: 1V=5'
0 100' 200'
0 5' 10'
R L
STA 4+00
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
R L
STA 13+00
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
R L
STA 14+00
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
R L
STA 16+50
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
R L
STA 21+00
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
R L
STA 28+00
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
R L
STA 33+00
-25
-20
-15
-10
-5
-25
-20
-15
-10
-5
0 1000-100-200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
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D B
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C H
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B
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C O
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SHEET ID
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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US Army Corps of Engineers
U .S
. A R
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C O
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TR
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F
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2D S
B
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MLLW -1.5' (NAVD88)
CURRENT SURVEY
DEPTH (January 2025)
2' MAX. PAID OVERDREDGE
TOLERANCE (typical)
REQUIRED DREDGING
DEPTH (-17.0', typical)
SCALE: 1H=100'
SCALE: 1V=10'
NOTES:
1. CROSS SECTION UNITS ARE SHOWN IN FEET.
2. SOUNDINGS ARE REFERENCED TO MEAN LOWER LOW WATER.
3. MEAN LOWER LOW WATER IS 1.5' BELOW NAVD88.
4. MEAN HIGH WATER IS 0.6' ABOVE NAVD88.
5. THE PLANE OF MEAN LOWER LOW WATER WAS DERIVED USING VDATUM. THIS
IS CEPD COMPLIANT.
6. CROSS SECTIONS SHOWN ARE PERPENDICULAR TO THE REFERENCE LINE.
7. REMOVE ALL MATERIAL FROM THE NAVIGATION CHANNEL, INCLUDING HARD
OBSTRUCTIONS, TO THE DESIGN DEPTH PLUS OVERDREDGE.
8. REMOVE MATERIAL FROM THE DEPOSITION BASIN TO 17' BELOW MLLW OR
REFUSAL, WHICHEVER COMES FIRST.
9. EAST SLOPE IS 1:1.5 TO ACCOMMODATE DOCK FROM STA 27+00 TO STA 30+75.
D
EP
O
SI
TI
O
N B
AS
IN
N
AV
IG
AT
IO
N
C H
AN
N
EL
150'100'
1.5
0 100' 200'
0 10' 20'
R L
STA. 1+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 500 6000-100
R L
STA. 2+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 500 6000-100
R L
STA. 3+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 500 6000-100
R L
STA. 4+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 500 600
R L
STA. 5+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 6+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 7+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 8+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 9+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 10+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 11+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
R L
STA. 12+00
-30
-20
-10
-30
-20
-10
0 100 200 300 400 5000-100
-6 MLLW
8.0' NAVD88
1' TOLERANCE
-6 MLLW
-6 MLLW
8.0' NAVD88
1' TOLERANCE
8.0' NAVD88
1' TOLERANCE
-6 MLLW
8.0' NAVD88
1' TOLERANCE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
A
B
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D B
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C H
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D R
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D
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B
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M
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C R
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SHEET ID
US Army Corps of Engineers
U .S
. A R
M Y
C O
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PS
O F
EN
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IN
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R S
N
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Y O
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D
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TR
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N
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+X
XX
XX
X-
XX
-X
-X
XX
X
+M M
M M
M M
M M
M M
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Y
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B
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D
(2 2.
X
4.
IN
C H
ES
+X
XX
XX
X-
XX
-X
-X
XX
X
LA
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M O
N
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N
AV
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N
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PR
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PR
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C T
TO
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, N Y
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S.
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G
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PL
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D R
ED
G
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M
AT
ER
IA
L
C R
O
SS
S
EC
TI
O
N S
H
EE
T
C-302
NOTES:
1. CONTOURS AND ELEVATIONS ON THIS SHEET ARE IN FEET AND REFERENCED TO NORTH AMERICAN
VERTICAL DATUM 1988 (NAVD88) AS DETERMINED USING VDATUM VERSION 4.6.1. THE -6 MLLW
DEPTH IS DISPLAYED FOR ENVIRONMENTAL REQUIREMENTS.
· MEAN LOWER LOW WATER IS 1.5 FEET BELOW NAVD88
· MEAN LOW WATER IS 1.4 FEET BELOW NAVD88
· MEAN HIGH WATER IS 0.6 FEET BELOW NAVD88
2. THE DATA DEPICTED ON THIS MAP SHOULD NOT BE USED FOR VOLUME CALCULATIONS PURPOSES.
3. THE INFORMATION DEPICTED ON THIS MAP REPRESENTS THE RESULTS OF SURVEYS MADE ON JANUARY 2025 AND CAN ONLY BE CONSIDERED AS THE GENERAL CONDITIONS EXISTING AT THAT
TIME.
4. FOR COVER SHEET AND INDEX TO DRAWINGS SEE SHEET G-001.
5. FOR GENERAL PLAN, GENERAL NOTES, AND DREDGING BOUNDS SEE SHEET G-101
6. FOR PLAN VIEW OF BEACH PLACEMENT AREA SEE SHEET C-102
Feet 0 100 200
Feet 0 10 20
VERTICAL SCALE:1V"=10'
HORIZONTAL SCALE:1H"=100'
| Lake Montauk sheets-G-001 Cover.pdf |
| Sheets and Views |
| G-001 Cover |
| Sheet 1 |
| Lake Montauk sheets-G-101 General Plan.pdf |
| Sheets and Views |
| G-101 General Plan |
| Sheet 1 |
| Lake Montauk sheets-G-102 General Plan for Channel.pdf |
| Sheets and Views |
| G-102 General Plan for Channel |
| Sheet 1 |
| Lake Montauk sheets-C-101 Dredging Plan.pdf |
| Sheets and Views |
| C-101 Dredging Plan |
| Sheet 1 |
| Lake Montauk sheets-C-201 Channel Profile.pdf |
| Sheets and Views |
| C-201 Channel Profile |
| Sheet 1 |
| Lake Montauk sheets-C-301 Channel Cross Sections.pdf |
| Sheets and Views |
| C-301 Channel Cross Sections |
| Sheet 1 |
File details come from the government source that posted it. Updated .