W912BU25BA009-AM0002-Dwgs.pdf
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- W912BU25BA009
About this file
This document is a technical drawing (C-104) from the U.S. Army Corps of Engineers Philadelphia District depicting the IRI Ebb Shoal Borrow Area Plan for the Indian River Inlet - North Beach Beach Nourishment project in Sussex County, Delaware. The plan shows two primary borrow areas (Area A and Area B) with specific dredging instructions, including a requirement to dredge Area A continuously to the maximum specified depth with a one-foot overdepth allowance before moving to Area B. The drawing includes detailed coordinate points, bathymetric contours, and critical notes about survey data from July 2024, vertical and horizontal references, and dredging specifications such as maintaining a maximum 5H:1V slope around the borrow area boundary to prevent disturbance outside the designated zone. Vibracore logs and sieve curves for the areas are referenced as available in the project specifications.
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Text version
PERMITTED BORROW AREA
AREA A
AREA B
KHV-103
KHV-105
KHV-104
KHV-230
KHV-231
AREA NOT AVAILABLE
FOR CONTRACT
AREA NOT AVAILABLE
FOR CONTRACT
COORDINATES
POINT NUMBER
NORTHING
222524.4
222836.5
221275.4
220963.6
222704.5
221179.7
221166.1
222682.9
221119.5
221816.3
222594.4
EASTING
759312.7
764643.8
764794.8
759462.9
762388.3
763158.5
762925.8
762019.8
762128.9
761745.7
760507.9
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NOTES:
1. THE SOUNDINGS DEPICTED ON THIS MAP REPRESENT THE
RESULTS OF CLASS 1 SURVEYS CONDUCTED IN JULY 2024 AND
CAN ONLY BE CONSIDERED AS INDICATIVE OF THE BATHYMETRY
AS IT EXISTED AT THAT TIME.
2. VERTICAL REFERENCE - NAVD 88.
NOOA TIDAL EPOCH- 1983 - 2001
3. HORIZONTAL REFERENCE - NAD 83 DELAWARE STATE PLANE,
ZONE 0700, U.S. FOOT.
4. THE POSITIONS OF THE AIDS TO NAVIGATION ARE PROVIDED FOR
INFORMATION ONLY, AND SHOULD NOT BE USED FOR NAVIGATION.
5. VIBRACORE LOGS AND SIEVE CURVES FOR THE VIBRACORES
SHOWN ON THIS PLAN CAN BE FOUND IN THE SPECIFICATIONS.
6. DREDGING SHALL BEGIN IN THE INDIAN RIVER INLET EBB SHOAL
BORROW AREA A. THE CONTRACTOR SHALL DREDGE ALL
MATERIAL TO THE MAXIMUM DEPTH WITH AN ALLOWABLE ONE
FOOT OVERDEPTH. DREDGING IN THE INDIAN RIVER INLET EBB
SHOAL BORROW AREA A SHALL BE CONTINUOUS UNTIL ALL
MATERIAL HAS BEEN REMOVED TO THE SPECIFIED DEPTH OF
THAT BORROW AREA PRIOR TO MOVING TO BORROW AREA B.
7. A MAXIMUM SLOPE OF 5H:1V SHALL BE LEFT AROUND THE INSIDE
BOUNDARY OF THE BORROW AREA TO PREVENT DISTURBANCE
OUTSIDE THE BOUNDARY OF THE BORROW AREA.
NORTH
PLAN
0200' 200'100' SCALE: 1" = 200'-0"A1 PLAN - IRI EBB SHOAL - BORROW AREAA1 PLAN - IRI EBB SHOAL - BORROW AREA b a b
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