20201405 Ver 1_Meeting Request Review_20201006

ID#* 20201405
Version* 1
Regional Office * Asheville Regional Office - [phone]
Reviewer List* Kaylie Yankura
Pre -Filing Meeting Request submitted 10/6/2020
Contact Name *
Contact Email Address*
Project Name*
Project Owner*
Project County*
Owner Address:
Terry E. Allen
[e-mail]
Replace existing Seawall at Grien Residence
Lauren G Grien
Transylvania
Street Address
110 Bee Tree Way
Address Line 2
aty
Lake Toxaway
Fbstal / Zip Code
28747
Is this a transportation project?* r Yes r No
Type(s) of approval sought from the DWR:
lW 401 Water Quality Certification - r 401 Water Quality Certification -
Regular Express
fi Individual Permit r Modification
r Shoreline Stabilization
Does this project have an existing project ID#?*
(' Yes r No
State / Province / Fbegion
North Carolina
Country
United States
Do you know the name of the staff member you would like to request a meeting with?
Please give a brief project description below. *

Furnish and install a new precast segmental block seawall, with riprap toe
apron, to replace the existing stone masonry seawall at 110 Bee Tree Way,
Lake Toxaway, Transylvania County, North Carolina. This is a Residential
project.
In addition to the 401 / 404 work, there are other shoreline improvements
that include a new Boardwalk, and Dock Improvements (no new concrete
footers). New Boardwalk & Dock Improvements shall to be in accordance
with the Section R327 of the 2018 NC Residential Code and Chapter 36 of
the the 2018 NC Building Code as applicable.
Please give a couple of dates you are available for a meeting.
10/14/2020
10/28/2020
Please attach the documentation you would like to have the meeting about.
C1 - GRIEN -- 10-05-2020.pdf
288.06KB
C2 - GRIEN -- 10-05-2020.pdf
144.67KB
C3 - GRIEN -- 10-05-2020.pdf
87.43KB
C4 - GRIEN -- 10-05-2020.pdf
518.34KB
C5 - GRIEN -- 10-05-2020.pdf
117.82KB
pdf only
By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
1 understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
1 also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.
Signature
Tarr- C. Allep
Submittal Date 10/6/2020
Reviewer Meeting Request Decision
Has a meeting been scheduled?* r Yes r No

Adjust height of seawall as —
necessary to maintain 18"
freeboard above normal pool
elevation
Normal Pool Elev. (3010 +/—)
Adjust height of seawall to
accommodate actual
topographic conditions.
Maximum Seawall Height
not to exceed 5—Ft.
RIPRAP Toe Apron to provide -
compensatory habitat. NCDOT
Class 2 Riprap.
Natural Stone Veneer (Optional),
specified by Others—\
„ � III III III
Stone Footer to be #57 clean stone
from LBM Industries
Existing Undisturbed Residuum with
minimum bearing capacity of 2000 PSF.
Do not bear retaining wall on
unsatisfactory of unstable material.
NOTES
SEAWALL TO BE CONSTRUCTED WITH
PRECAST CONCRETE TOXAWAY BLOCK
#8 epoxy coated vertical dowel bar
continuous through all segmental blocks
couRsE below. All cells to grouted solid w/ 4000
4 psi hydraulic cementious grout suitable
for underwater application.
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Non —woven needle punched geotextile
COURSE
fabric between stone fill and earth
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subgrade
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COURSE
1—FT Thick Chimney Drain behind wall.
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Drainage Stone to be #467 clean stone
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from LBM Industries
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Wrap stone aggregate footer with Mirafi
50OX geotextile fabric or equal.
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00 * Increase depth of stone footer as
required to ensure confined aggregate
? footer bears on satisfactory insitu
---------- ----- material having a minimum bearing
capacity of 2000 PSF.
(:]:)SEAWALL FOUNDATION DETAIL C Copyright 2020 T.E.
C-5 NOT To SCALE ALLEN ENGINEERING PC.
All Rights Reserved
Worldwide.
1. This Detail in only applicable to the seawall
along the shoreline. Field verify all dimensions and
material quantities prior to ordering materials or
beginning work. Contractor's verification shall
include, but not be limited to; shoreline bank
height, depth —of —water at shoreline, subgrade
bearing capacity, length of seawall, block quantities,
etc.
2. See Sheets C-1, C-2, C-3 and C-4 for
additional requirements.
3. Furnish and install Buttresses for lateral
stability, at intervals not exceeding 12—ft on
center, where the height of unbalanced fill behind
seawall exceeds 4'-6".
PRELIMINARY — NOT
FOR CONSTRUCTION
1 10-05-2020 1
C-5
SHEET 5 OF 5

NOTES.
£
1.0 All
GENERATOR TO HE
Features of
0 RELOCATED (BY OTHERS)
Work shown on
!-'
6' ASPHALT CART PATH
this Site Plan,
=) 0)
o E
except the
PO
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REMOVE RFCREATE
'NOLICHUCKY'USTONEDTERRACE
Segmental
0 N O M O
Block Seawall,
o b I E
0) o
0
were designed
DS-8
by others.
14-
o (1 c
JUN ❑zgl3)
EXISTING SHRUB HEDGE
" O
TG REMAIN
L O O
CORKOD)z)
(1)CERCAN
2.0 New
a- -1 N a '4-
Boardwalk &
EXTEND WALLS AS NECESSARY
(28JDEU NIK
Dock
C
N
TO ACCOMMODATE CART PATH
C3' MAX HEIGHT)
(�4z)aERTea
Improvements
6
=3
EXISTING STONE STEPS
shall to be in
z
0
CREATE NEW RETAINING WALL
TO EXPAND GAME LAWN WITH
TO REMAIN
QQ
accordance with
F
E
HEDGE BORDER. NEW WALL
OFFSET 6FT FROM
WALL ALIGNMENT.
(za)Eux wiS
the Section
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cs' MAx HEIGHT)
HYD ANIAM)
q (3)HYDANN
R327 of the
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PRO OT2(10J
7
Residential
``'
a s
CEP PR2(46)
. (4RCOTEEA
Code and
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Chapter 36 of
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NEW STONE STEPS TO
MATCH EXISTING STEPS„
p
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the the 2018
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NC Building
BOAT STORAGE RACK
......
Kr.,'jeiyrji'�
Code as
LLJ
(BY OWNER)
COT SEA(24)
applicable.
W
NEW 12'%12' CANOE DOCK
RECESS (I) RISER BELOW
MAIN BOARDWALK
EXISTING STONE STEPS
:�
�--�
TO REMAIN
O
FLAGSTONE FIREPIT TERRACE (18' DIAMETER) WET BAR PATIO
WITH SING AND REFRIGERATOR NOTE
STONE VENEER RETAINING WALL - CONTRACTOR TO PROVIDE EROSION CONTROL
(5' MAX HEIGHT) MEASURES AS REQUIRED TO ENSURE NO
>M
6FT WIDTH IPE BOARDWALK OVER EXISTING SEA WALL. SEDIMENTATION ENTERS LAKE TOxAIniAY.
NEW BOARDWALK TO OVERLAP EXISTING SEA WALL.
4] p
C Copyright 2020 T.E.
NEW SEAWALL BENEATH NEW S1 TE PLAN - NEW FEA TURES ALLEN ENGINEERING PC.
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rj--� All Rights Reserved
BOARDWALK. The existing Worldwide.
Not to Scale
" a
p
Stone masonry masonry C-4
seawall along shoreline shall
to be replaced with new
PRELIMINARY — NOT
Segmental Block Seawall with
FOR CONSTRUCTION
Riprop Detail on Sheet C-5.
All Boardwalk and Dock
Improvements shall be
10-05-2020
designed by others. No
concrete footers.
C-4
SHEET 4 OF 5 ,

0SA
Existing Stone
Masonry Seawall alonc
shoreline, to be
replaced with new
Segmental Block
Seawall with Riprop
Detail on Sheet C-5.
M
LO
75, 4' GCVO FNdRY
CLFN
DWELLING
LOT 94
0.52 ACRES
h
V OVER
1
/ r
LOT 95
STAMM
TRA VF"'3F UNFS ALONG
iP5 EDGE OF ROCK. SEAWALL s556
'7 rg' {TYP'CALj
c4
_ ena r
OCK NOuSE
IPF
72.67'
LAKE TOXAWAY ' Ls
LAKE TOXAWAY PROPERTY
OWNERS ASSOCIA77ON EDGE GF CAKE = PROPERTY LINE
EX/STING S/TE CONDITION
Not to Scale
The Survey Data and Site Features shown on this Site Plan was provided by
Sylvester & Company Land Surveyors dated July 7, 2016 (Revised Date July 8,
2016). This Site Plan is intended for Environmental Permitting only, and should
not be considered an official Land Survey. Do no rely on any survey data,
boundary and topographic information shown on this Site Plan. See official Land
PN111111�04
1.0 New
Boardwalk &
Dock
Improvements
shall to be in
accordance with
the Section
R327 of the
2018 NC
Residential
Code and
Chapter 36 of
the the 2018
NC Building
Code as
applicable.
J Copyright 2020 T.E.
ALLEN ENGINEERING PC.
All Rights Reserved
Worldwide.
PRELIMINARY — NOT
FOR CONSTRUCTION
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10-05-2020
C-3
SHEET 3 OF 5

GENERAL NOTES AND SPECIFICATIONS.
1.0 All work shall be in accordance with the latest edition of
the North Carolina Building Code, ACI 301 — Specifications for
Structural Concrete for Buildings, ACI 318 & 318R — Building
Code Requirements for Structural Concrete, ACI 548.113 Guide
for Use of Polymers in Concrete, ACI 546R Concrete Repair
Guide, AISC Steel Construction Manual, OSHA Safety and
Health requirements, and all other applicable codes,
ordinances, and regulations. Contractor shall obtain all
required permits prior to beginning work
2.0 The existing property lines and the Side Yard Setback
shall be located, marked and flagged by a Professional Land
Surveyor prior to beginning work. Verify actual setback
requirement with the most current Lake Toxaway Community
Association Architectural Review Standards.
3.0 Contractor shall verify and establish all Finish Floor
Elevations (FFE) prior to beginning work. Do not locate any
part of the structure within any set —back, easement,
right—of—way, floodway or flood fringe, NCDEQ regulated
set —back, trout stream buffer zone (or other buffer zone or
set back). Contractor shall obtain all required permits prior to
beginning work. Contractor shall locate all property
boundaries prior to beginning work. Contractor shall locate,
flag and protect all underground utilities prior to beginning
work.
4.0 Design criteria and assumptions:
Design Method = ASCE-7, Minimum Design Loads for Buildings
and other Structures
Soil Bearing Capacity = 2000 psf, assumed
Floor Live Load = 40 psf
Floor Dead Load = 15 psf
5.0 FOOTINGS. The bottom of footings shall be located
below the frost line. Footings shall be stepped where it is
necessary to change the elevation of the top surface of the
footings or where the slope of the bottom surface of the
footings will exceed 0.1 unit vertical in ten units horizontal
(1% slope). All individual pier footings shall be restrained
from sliding with anti —slide keys, helical piers, etc).
6.0 CONCRETE. Concrete shall have a minimum compressive
strength of 4000 psi at 28 days and shall have 5 to 7%
entrained air. DO NOT ALLOW FRESH CONCRETE TO CONTACT
LAKE WATERS.
7.0 REINFORCING STEEL. All reinforcing steel and anchor
dowels shall conform to ASTM A 615, Grade 60 and shall
have standard deformations. All footer reinforcing bars shall
have a minimum of 3" of concrete cover. All rebar lap
splices shall be 60 bar diameters unless otherwise noted. All
footer steel shall be bonded and grounded per the NEC.
8.0 TROUT BUFFER REQUIREMENTS. Where the "on shore"
work is within 25—ft of the top —of —bank, and exceeds 10% of
the shoreline frontage, the Contractor shall obtain a Trout
Buffer Variance from the NCDEQ—DLR Asheville Regional Office
(P.O.C. Stan Akin, 828-296-4500).
15A NCAC 04B .0125 BUFFER ZONE REQUIREMENTS.
(a) Unless otherwise provided, the width of a buffer zone is
measured from the edge of the water to the nearest edge of
the disturbed area, with the 25 percent of the strip nearer
the land —disturbing activity containing natural or artificial
means of confining visible siltation.
(b) The 25 foot minimum width for an undisturbed buffer
zone adjacent to designated trout waters shall be measured
horizontally from the top of the bank.
(c) Where a temporary and minimal disturbance is permitted
as an exception by G.S. 113A-57(1), land —disturbing activities
in the buffer zone adjacent to designated trout waters shall
be limited to a maximum of ten percent of the total length
of the buffer zone within the tract to be distributed such
that there is not more than 100 linear feet of disturbance in
each 1000 linear feet of buffer zone. Larger areas may be
disturbed with the written approval of the Director.
(d) No land —disturbing activity shall be undertaken within a
buffer zone adjacent to designated trout waters that will
cause adverse temperature fluctuations, as set forth in 15A
NCAC 2B .0211 "Fresh Surface Water Classification and
Standards", in these waters.
J Copyright 2020 T.E.
ALLEN ENGINEERING PC.
All Rights Reserved
Worldwide.
PRELIMINARY — NOT
FOR CONSTRUCTION
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1 10-05-2020 1
C-2
SHEET 2 OF 5

HEM SEAMALL Q163 LF +/=� 8� MEN REMENCE
110 Bee Tree Way, Lake Toxaway, NC
1.0 This Project is to install 163 LF of new precast
segmental block seawall to replace the existing stone
masonry seawall that is in poor condition, and to construct
other Boat Dock improvements. Boat dock to be designed
by others, with wood pile foundation (no concrete footers).
Comply with the latest edition of the Lake Toxaway
Community Association Architectural Review Standards.
2.0 CONDITIONS FOR USE OF THIS PLAN. These conditions
apply to all sheets and all engineering provided herein. By
accepting this Plan, you and any others to whom it is
distributed, agree to the following conditions;
2.1 As a result of this design, a number of observations
have been made and recommendations provided, including
plan(s), details and specifications. It should be noted that
the plan(s), detail and specifications provided herein are
based on information provided as of this writing. It is
conceivable that additional information may be forthcoming
which bears on these details and specifications. The right
is reserved, therefore, to review and modify all observations,
conclusions, details and specifications at any future point in
time should, in fact, additional information become available.
2.2 Limitation of Liability. All other work that may be
required, but not shown herein, shall be designed by the
Contractor. By accepting this engineering document, the
Owner, Contractor and any others to whom it is distributed,
agree to a strict limitation of liability for TERRY E. ALLEN
ENGINEER, Terry E. Allen PE, T.E. ALLEN ENGINEERING, P.C.,
and its employees to an amount not to exceed $25,000.00
or one—half the total amount of paid invoices, whichever is
less.
2.3 Indemnification. The Owner and the Contractor shall
indemnify and hold harmless T.E. Allen Engineering, PC
(hereinafter the 'Engineer), and its officers, agents,
employees and assigns, to the fullest extent permitted by
law, for any loss, cost expenses or damages incurred by the
Engineer as a result of the Owner's and/or Contractor's
breach of this Agreement or for any act or omission caused
solely by the negligence of the Owner and/or Contractor, its
employees and its other consultants and subcontractors.
This requirement to indemnify and hold harmless shall
include compensation for the Engineer's reasonable
attorneys fees.
© Copyright 2020 T.E. ALLEN ENGINEERING PC. A
3.0 All work shall be in accordance with North Carolina State
Residential Building Code, OSHA Safety and Health
Requirements, US Army Corps of Engineers 404 permit
requirements, NCDEQ Division of Water Quality 401 permit
requirements, NC Sedimentation Pollution Control Act, Lake
Toxaway Community Assoc requirements, and all other
applicable codes, ordinances, and regulations. The Contractor
shall coordinate all work with the Lake Toxaway Operations
Manager, 16801 Rosman Hwy, Lake Toxaway, NC 28747.
4.0 TURBIDITY CONTROL. The Contractor shall not violate
water quality stream standards during the performance of this
work. The Turbidity Level in the lake waters shall not exceed
10 NTUs above background levels at any time during
performance of this work pursuant to 15A NCAC 0213.0211
(3)(k). The Contractor shall employ any and all methods
necessary to prevent a violation of the Turbidity Standards.
As a minimum, the following turbidity control measures shall
be employed. These methods shall be modified and improved
as necessary to prevent violation of water quality standards;
4.1 To ensure compliance with Water Quality requirements,
the work shall be performed "IN THE DRY" using a coffer dam
to create a dry work area, or during a Lake Drawdown.
Where a coffer dam is used, a minimum of two (2) turbidity
curtains shall be used around the outside (wet side) of the
coffer dam. The work area isolated by the coffer dam may
be dewatered by pumping. All dewatering discharge shall
have a turbidity of not more than 10 NTUs above background
or as otherwise specified in DWQ's Turbidity Standards (15A
NCAC 02B.0211(3.)(k.)). To satisfy the required turbidity limit,
the dewatering pump discharge shall be filtered through a
Bag Filtration Unit equal to Model BF-400 from
Rain —for —Rent with a 100 to 1 micron nominal rating (P.O.C.
at Rain —for —Rent is Jeremy at 704-393-3345). The
dewatering flow from the flirtation bag shall be discharged in
front of (on the work side of) the two (2) turbidity curtains
for additional filtration. The turbidity level of all discharge
shall be monitored with calibrated turbidity meters and the
filtration equipment shall be adjusted as necessary to insure
compliance with Water Quality Standards. The water around
the work areas shall likewise be monitored with calibrated
turbidity meters and the turbidity curtains shall be adjusted
as necessary to insure compliance with Water Quality
Standards.
PRELIMINARY —NOT
II Rights Reserved Worldwide.
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1 10-05-2020 1
C-1
SHEET 1 OF 5