91-96 Oversized Plans Minor Mod Bald Head Island Limited 11

L16F
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Deep Point Marina
'
Bald Head Island L1mited PLC
Is
Fence Best Placement do #M-1 S & M E 40'SCal l Borir
Report Date 11 -8-96
V
Appx Est Orig Grade 7 FVI
_Q 41
P,
RECEIVED
I)CM WILMiNGTON, NC
S&ME 40'Soi) Boring Soil Description 11 -8-96 Report: Closet Boring = M-..-
Estimated Original Grade 19 FMSL
Proposed Sofl/Spoil Mounding: 1' Intervals
Silt Fence per NCGO1 Ground Stabilization and Materials
Depth
Elevation Description
UCSC SIFT N3 Blows/Ft
Mare k Est Friction Angle
Handling (Separate Sheet Effective Dated 4/1/19 indicates
Spoil Basin #2 Interior Side Slopes Designed at 1,5H:1V Interior End Slopes are Shallower
Ot-0.5'
19 FMSL Organics & Loamy Silt To be Removed
Spoil Basin Max Footprint
for Stockpiles, 5' of separation is to be maintained from
based on AutoCad Polyline 1,5'Offset Side Slopes. West End Cad Slope 196'H-126'V 7.),-H:lV±
�J
0.5'-3D
18.5 to -14 FMSL Medium Dense to Loose Fine to Medium Sand
(SP)
the toe to the silt fencle.. This Spoil Basin is not quite a
East End Cad Slope 50'H.26'V = 1.92:1Vt
33'-40'
-14 to -21 FMSL Loose to Medium Dense Clayey Fine Sand
(SC)
Existing SW Basin 25-1
Stockpile, but Silt Pence is Drawn as much as possible to
As Site is Sand
As drawn, 23HAV End Slopes, 2H:1V Side Slopes
2'
17 FMSL Medium Dense to Loose Fine to Medium San6
(SP) 11
350
follow this guidance, Silt Fence along road to be set at
10' off of edge of road.
(Shallower 2.5H:1V End Slopes to make machinery access/emptying basin easier.)
4_5'
14.5 FMSL Medium Dense to Loose Fine to Medium Sand
(SP) 6
31.5°
Cross Section Centerline
7'
12 FMSL Medium Dense to Loose Fine to Medium Sand
(SP) 7
32.5"
Note. CAMA by Heather Coats E-mail 12-10-2011
THIS PROJECT IS NOT INTENDED TO PRODUCE ANY
9.51
9.5 FMSL Medium Dense to Loose Fine to Medium Sand
(SP) 8
33.50
confirming Doug Huggett Conversation that extending
NEW IMPERVIOUS. SPOIL BASIN FUNCTION IS SELF
15,
4 FMSL Medium Dense to Loose Fine to Medium Sand
(SP) 16
370
Exist SW Pipe/Outlet
spoil basins upward (and inward by virtue of the no
CONTAINING, SO NO OFFSITE DRAINAGE OTHER
19.51
45 FMSL Medium Dense to Loose Fine to Medium Sand.
(SP) 7
32.50
steeper than 2H:1 V Exterior Slopes) is allowed as long
THAN EXISTING
24,5'
�-5.5 FMSL Medium Dense to Loose Fine to Medium Sant
(SP) 8
33.50
Temp Const Entrance: Detail Sheet 5
that the original footprint is maintained. Hence the Spoil
Basin Design Max Foot� rint is shown in places further
P
GROUND Stabilization and Materials handling to be
Whereas Very Dense is Typically Defined as > 50 Blows/ft = >45" Angle of Internal
Friction; Dense = 30-50 Blows/ft 400-450;
out than the proposed top®, in order to give constructor
per included NCG01 Drawing and 2017 S&ME Page
Compact =10-30 Blows/ ft = 35'-40'; Loose 4-10 Blows/ft = 30"-35*; Very'Loose = < 4 Blows/ft <30'
Voluntary 1 S' Setback (Min) From The Landings P1,
more leeway in maximizing the basin interior volume or
2 "Notes" "Notes is a bit more site specific, but if
Approximate Spoil Basin #2 Presently Undisturbed Site has (after clearing/grubbing) a min angle of internal Friction
= 31.5' = 1.63HAV;
for dry soil/dry spoil placement,
conflcts with NCGO1, NCGO1 contraols as it is newer.
max 37'
=132 1.32H:lV; and an appx average = 316" = 1.5H:1V in relevant
depths of the proposed Spoil Basin #2
This project is additional area to existing S&E Permit Spoil Basin #2 interior side slopes shown as nominal 1,SH:IV = 33.6* to maximize interior volume. From the original soil report, this should be
BRUNS-2017­049. Cover Sheet 1, Notes 2, and achievable, or close to achievable, It doesn't matter if the interior slope is s�lghtly less or more at time of construction, as the intended spoil will
Details 5 are still relevant for this very similar phase further support the interior slopes,
of Spoil Basin Functions for the Deep Point Marina.

Lonaitudinal, Cross Section
Easterly (Marina Basin) End of Proposed Spoil Basin #2
Spoil Bi sin #2 Designed with 2H:1V or Sliallower ide Slopes
As draorn: 2.5li'1V End Slopes; 2H:1V Side Slopes
(Shallower 2,5H:1 V End Sloves to make r iachinerviaccess/erg
afrit] . 0 — — -1
Spoil Basin #2 Interior ide Slopes Designed at 1, H: 1 V Interior End Slopes a -e Shallower based on AutKad Polyline 1.5' Offset Si eSlopes.
West End Cad S ope 195H:26'V = 7rSH:1Vt
East End C-.id Slope 5011:26V = 1.92-,l\'±, 1,5HT1 Interior s Slope
As Site is Sand
As drawn: 2.SH-.'V End lopes; 2H:1V S de Slopes 2.5H:1 V En J --_xter
(Shallower ZSH.- IV End Slopes to make machinery access/emptying basil ea;ier)
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Transverse Section: Spoil Basin #2
E
2H.1V xter�or
')n 4"�rch D
�'� 26 FMSL Top I
Side Slopes
� ' V) 24 FMSL Freeboard/Tdp of Watermow 0Delp POI n
V
Property
1u Top Flat 22 FMSL Top of Spoil V)-IVior
I� Interior Side 2H. Exter" L
26 FMSL'
Slopes Side Slopes
(D
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20 FMSL
-10 FMSL L
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BRUCE MAREK, P.E.
5489 F-ASTWIND RD
WILMINGTON, NC 28403
CELL 910-228-2484
Scale.- 111=1 I
on Arch A

DEEP POINT NIARINA C:A IA##91-96
PROPOSED SPOIL BASIN ##2 SPILLVVTAY DETAIL
CHANNELS, I -BEAM AND BOARDS
3" CHANNEL OR SPILLWAY MAKER'S STD
P:T. SLOPPY VEE OR T&G BOARDS
3" I -BEAM OR SPILLWAY MAKER'S STD
3" CHANNEL OR SPILLWAY MAKER'S STD
ABOVE SIZES BASED ON EXISTING SPOIL BASIN #1 SPILLWAY,
IF SPILLWAY OF SLIGHTLY DIFFERENT SIZE OR SHAPE IS
COMMERCIALLY OR READILY AVAILABLE, THAT IS ACCEPTABLETOP 24 FMSI
TO ENGINEER. (LE. 4'X4' BOX SECTION)
16'+/-
PROPOSED SPILLWAY WITH NEW 48" GALVANIZED
CORRUGATED HALF PIPE EXTENDING OF FOR 2` FREEBOARD
ITION AS SHOWN
CONTRACTOR TO VERIFYSOIL CONDITIONS AND SAFELY
EXCAVATE BERM TO SET BOTTOM OF NEW 18" CORRUGATED
STEEL OUTLET PIPE AT APPX ELEV 11 FMSL. BUILD BERM
ABOVE & BACKFILL TO STABILIZE SLOPES AND TOP FLAT,
TOP FLAT: APPX 10' WIDTH T
TOP ELEV 26 FMSL (NOMINAL)
2'
TOP WATER ELEV 24 FMSL
TO FOIL ELEV 22 FMSL (NOMINAL)
APPX51+1—
SILT FENCE
O ND
C{
(STANDARD PIPE LENGTHS TO BE UTILIZED IF POSSIBLE)
NEW 18" OUTLET PIPE: VERIFY LENGTH AT SITE
WELDED 1$" STUBOUT FLANGE PLATE/REDUCER
PER SPILLWAY MAKER TO DREDGER'S PIPE (�/p 6"-8'"0)
STANDARD DETAIL
PIPE INTERSECTIONS TO BE SECURELY JOINED. ('BY CLAMPING DREDGER'S PIPE OR HOSE
OF BELL & SPIGOT AND/OR SEALED WITH COAL TAR OR EXTENSION TO RIVER
SIMILAR SEALANT) (TYPICALLY 6`" OR 8" 0
(APPX 700' TO MLW)
NOT SHOWN: ANCHORAGE OF DREDGERS PIPE END
TO RIVER BOTTOM AT/BELOW MLW RIVERWARD OF
ANY MARSH GRASSES..
DREDGER(S) TYPICALLY USES DANTFORTH MARINE'
ANCHOR ATTACHED TO/THRU END OF PIPE.
EROSION CONTROL: PLACE SILT FENCE TO DOWNWARD SIDE OF RIVERSIDE
OF BERM AT CUT FOR PIPE, TO REMAIN IN PLACE UNTIL VEGETATED..
SEEDING IN PIPE AREA: USE CU'RLEX/ECO-MAT (FIBERCLASS NETTING WITH
WOOD SHAVINGS, 4` ROLLS) OVER DENUDED AREAS, SET WITH SOD
STAPLES. OVERSEED WITH WEEPING LOVEGRASS W/SUMMIT SEED
COATING (A FERTILIZER. COATING BY PINNACLE SEED CO.) AT THE RATE OF
3 LBS PER 1000 SF.
NOTE: DRAWING NOT TO SCALE. ACTUAL SLOPES ARE LESS STEEP.
A- tit, cwre At"l px Lo
0 if let 'trurt, cation and I
Olt-flow
v
1. Example 4' Diameter Half —Pipe Spillway Structure
(From Deep Point 2009 Spoil Basin #1 Replacement')
20 FMSL
t'-'-
[U11FINM
r
B,(_'_")ut1e",'r Structure hr-mx Location and
eeger Outflow Pipe Path
tk.
pzL
$ ,-
°
T,
v
4' Diameter Half —Pipe Spillway
�. Example m p p ay Structure
with wood wash boards
3. Example 4' Diameter Half --Ripe Spillway
Structure with galy. wire tie dowels
1.5 H:1 V Interior
Side Slopes
0 FMSL
Transverse Section: Spoil Basin #2
-10 FMSL'
0 0
o
o cry
1.5
0 FMSL
5 Example Thru—Berm Cutlet Pie with
p p
reducer plate for dredgers pipe
k
4. Example u e x Thr a —Berm Outlet Pi E a pp
Structure 24
AREA
A T
TCP OF
BERP✓l = 26 FMSL
= 27) 500 SF
AREA
A T
TOP OF
WA TER= 24 FMSL
= 24,900 SF
AREA
A T
TCP GF
SPOIL = 22 FMSL
= 22; 350 SF i
A REA
A T
21' elev
= 27,000 sf
AREA
AT
20' elev
= 191800 sf
AREA
AT
75' elev
= 74,200 sf
A REA
A T
70' e,%ev
= 91700 sf
AREA
A T
5' elev
= 6.1000 sf
AREA
A T
0" elev
= 3,100 sf
otal
Togo
Map Vol'ume iiom 0' to 22 e/ev
=9,200+
cu yds Addi'h*onof
Volume Achievable r,y
reeving
dewatered
spoil to adjacent
spoil mounding
area (cyan) on sheet C1.
DeEc;
t-oint ," i _.cuthport, NC
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Exist Infiltration---.�......,..
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on Arch D
8. Example dredgers pipe continuing into river
(with tie down and anchor below water at high tide)
AUG Z 0 '
DCM WILMINGTON, NO
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OFss�oN`!�y�
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BRUCE MAREK, P.E.
5489 EASTWIND IUD
WILMINGTON, NC 28403
CELL 910-228-2484 00
a
DEEP POINT MARINA.
1 3,01 FERRY DRIVE
SOUTHPORT, NC 2B41
OAMA # 91-9i6 MINOR MOD
2021
SPOILS BASIN #2 Spillway Leta€I
0077
DEEP PT SPOILS BASIN#2

FAY ROAD SE NC HWY 211
r
RECEIVED
Al IG 2 0 2021
AGM VVILMINQTQN,