20160016 Ver 1_401 Application_20151215

T.E. ALLEN ENGINEERING, P.C.
Post Office Box 103
Rosman, North Carolina 28772
Phone [phone] Firm # C-1997 Mobile [phone]
November 20, 2015
SUBJECT: Pre -Construction Notification (PCN) Application Form for 401/404 Permits
for Boathouse Foundation & Adjacent Boulder Seawall at Gladden Residence, Lot 38
Windward Point Road, Lake Toxaway Estates, Lake Toxaway, Transylvania County,
North Carolina
2'0160016
EDEItNR.
9 2015
NC DWQ, 401/Wetlands Unit 1650 Mail Service Center WATER ERMI'rrCE
Raleigh, NC 27699-1650
Dear DWQ:
Enclosed, please find five (5) copies of the 401/404 application (PCN form). A check
for the application review fee is also enclosed. This project is for a boathouse Foundation
Wall and new Boulder Seawall at Lake Toxaway Estates, Lake Toxaway, North Carolina.
See attached drawings and sketches. Lake Toxaway has a water quality classification of
B; Tr.
All disturbed areas not to be filled or flooded will be vegetated pursuant to the
seeding schedule in the Erosion and Sediment Control Planning and Design Manual. If
you have any questions or require any additional information, please do not hesitate to
contact me at [phone] or email tealleneng(2citcom.net.
Sincerely,
Terry E. Allen, P.E.
Consulting Engineer
Enclosures 5 copies of 401/404 PCN Application Form
Check for application review fee

Copy Furnish w/ attachment:
401 PERMITTING
Mr. Tim Fox
NCDENR Division of Water Quality
2090 US Hwy 70
Swannanoa, NC 28778
828-296-4500
NC FISH & WILDLIFE PERMITTING
Andrea Leslie
Mountain Habitat Conservation Coordinator
20830 Great Smoky Mountain Expressway
Waynesville, NC 28786
828-400-4223
USACE 404 PERMITTING
Mr. David Brown
Asheville Regulatory Field Office
US Army Corps of Engineers
151 Patton Ave, Room 208
Asheville, NC 28801-5006

0�oFWA7FgQG Office Use Only:
2 0 60
O, Corps action ID no.
O T
6' DWQ project no.
Form Version 1.3 Dec 10 2008
Page 1 of 12
PCN Form —Version 1.3 December 10, 2008 Version
Pre -Construction Notification PC Form
A. Applicant Information
IEP r
1.
Processing 1"I
nrr
la.
Type(s) of approval sought from the
Corps:
® Section 404 Permit E] Section 10 Permit
1 b.
Specify Nationwide Permit (NWP) number: 3 or General Permit (GP) number:
401 a BUFFER PERMiTT1NG
1c.
Has the NWP or GP number been verified by the Corps?
® Yes
❑ No
1d.
Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
le.
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification:
❑ Yes ®No
For the record only for Corps Permit:
❑ Yes N No
1f.
Is payment into a mitigation bank or in -lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu
fee program.
❑ Yes
N No
1g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes
® No
1h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes
® No
2.
Project Information
2a.
Name of project:
Boathouse Foundation & Boulder Seawall for Gladden Residence
2b.
County:
Transylvania
2c.
Nearest municipality /town:
Brevard
2d.
Subdivision name:
Lake Toxaway
2e.
NCDOT only, T.I.P. or state
project no:
3.
Owner Information
3a.
Name(s) on Recorded Deed:
Joseph R. Gladden Jr., and Sarah B. Gladden
3b.
Deed Book and Page No.
Deed Book 00722, Page 0381
3c.
Responsible Party (for LLC if
applicable):
3d.
Street address:
Lot 38 Windward Point Rd.
3e.
City, state, zip:
Lake Toxaway, NC 28747
3f.
Telephone no.:
540-456-8353
3g.
Fax no.:
3h.
Email address:
Page 1 of 12
PCN Form —Version 1.3 December 10, 2008 Version

4.
Applicant Information (if different from owner)
4a.
Applicant is:
❑ Agent ❑ Other, specify:
4b.
Name:
4c.
Business name
(if applicable):
4d.
Street address:
4e.
City, state, zip:
4f.
Telephone no.:
4g.
Fax no.:
4h.
Email address:
5.
Agent/Consultant Information (if applicable)
5a.
Name:
Terry Allen, PE
5b.
Business name
(if applicable):
T.E. ALLEN ENGINEERING, PC
5c.
Street address:
P.O. Box 103
5d.
City, state, zip:
Rosman, NC 28772
5e.
Telephone no.:
828-877-4883
5f.
Fax no.:
5g.
Email address:
[e-mail]
Page 2 of 12
PCN Form —Version 1.3 December 10, 2008 Version

B.
Project Information and Prior Project History
1.
Property Identification
1 a.
Property identification no. (tax PIN or parcel ID):
PIN 8522-45-6089-000
1b.
Site coordinates (in decimal degrees):
Latitude: 35.128796 Longitude: - 82.93284
(DD.DDDDDD) (-DD.DDDDDD)
1c.
Property size:
0.513 acres
2.
Surface Waters
2a.
Name of nearest body of water (stream, river, etc.) to
proposed project:
Lake Toxaway
2b.
Water Quality Classification of nearest receiving water:
B, Trout
2c.
River basin:
Savannah
Page 3 of 12
PCN Form — Version 1.3 December 10, 2008 Version

3.
Project Description
3a.
Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
This home site located in Toxaway Estates, a private residential development in western Transylvania County, NC. The
lot borders Lake Toxaway which has a classification of B: Trout. The general land use is residential. The existing
boathouse and dock are to be removed. New boathouse and adjacent boulder seawall are to be built in same location as
existing boathouse. See attached site Sketches and Details
3b.
List the total estimated acreage of all existing wetlands on the property:
none
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
none
3d.
Explain the purpose of the proposed project:
Remove existing boathouse and dock. The foundation for the new boathouse is to be precast concrete segmental block
located. The adjacent seawall is to be natural boulders.
3e.
Describe the overall project in detail, including the type of equipment to be used:
NEW WORK;
1. Furnish and install new Precast Concrete Segmental Block Seawall Foundation to support new Boathouse. The
adjacent Seawall shall be natural boulders. See attached Site Plan Sketches and Detail Sheets C-1, C-2, C-3 & C-4.
Overall dimensions shall be determined by the Boathouse & Boat Lift Designer.
Work to be performed using hand labor & small equipment.
To comply with Water Quality requirements, the boathouse foundation (seawall) work will be performed in the dry. This
will be accomplished by installing a temporary coffer dam around the proposed work area, or by scheduling the work
during the upcoming lake draw down. Where a coffer dam is used, the work area will 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 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.
Uncured concrete shall not be allowed to come into direct contact with surface waters. This will be accomplished by
establishing a "dry work area" as described above. "High Early" cementious material shall be in the stone work to
minimize curing time.
4.
Jurisdictional Determinations
4a.
Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
❑ Yes ® No ❑ Unknown
project (including all prior phases) in the past?
Comments:
4b.
If the Corps made the jurisdictional determination, what type
Preliminary ❑Final
of determination was made?
4c.
If yes, who delineated the jurisdictional areas?
Agency/Consultant Company:
Name (if known):
Other:
4d.
If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
Page 4 of 12
PCN Form —Version 1.3 December 10, 2008 Version

S. Project History
5a. Have permits or certifications been requested or obtained far
this project (including all prior phases) in the past?
❑Yes ® No ❑ Unknown
5b. If yes, explain in detail according to "help file" instructions.
6. Future Project Plans
6a. Is this a phased project?
❑ Yes ® No
6b. If yes, explain.
Page 5 of 12
PCN Form —Version 1.3 December 10, 2008 Version

C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
❑ Wetlands ❑ Streams - tributaries ❑ Buffers
® Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of jurisdiction
number -
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ - non -404, other)
(acres)
Temporary
W1 ❑ P ❑ T
El Yes
El Corps
❑ No
❑ DWQ
W2 ❑ P ❑ T
El Yes
El Corps
❑ No
❑ DWQ
W3 [I P ❑ T
El
❑ Corps
❑ No
❑ DWQ
W4 ❑ P ❑ T
El Yes
El corps
❑ No
❑ DWQ
W5 ❑ P ❑ T
El Yes
El Corps
❑ No
❑ DWQ
W6 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
2g. Total wetland impacts
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
3b.
3c.
3d.
3e.
3f.
3g.
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number -
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ - non -404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
❑ PER
❑ Corps
S1 ❑ P ❑ T
❑ INT
❑ DWQ
S2 ❑ P ❑ T
❑ PER
[-ICorps
❑ INT
❑ DWQ
S3 ❑ P ❑ T
El PER
[_1 Corps
❑ INT
❑ DWQ
S4 El P ❑ T
El PER
El Corps
❑ INT
[-I DWQ
S5 El P ❑ T
E] PER
El Corps
❑ INT
❑ DWQ
El PER
El Corps
S6 E] P ❑ T
❑ INT
❑ DWQ
3h. Total stream and tributary impacts
3i. Comments:
Page 6 of 12
PCN Form -Version 1.3 December 10, 2008 Version

4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
4a.
4b.
4c.
4d.
4e.
Open water
Name of waterbody
impact number—
(if applicable)
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
Temporary
01 ®P ❑ T
Boathouse Foundation
Lake
0.01
02 ❑ P ❑ T
Boulder Seawall
Lake
0.01
03 ❑P❑T
04 ❑P❑T
4f. Total open water impacts
0.02
4g. Comments:
The Boathouse Foundation and Seawall work will be accomplished "in the dry" by installing a temporary coffer dam around
the proposed work area, or by scheduling work during the up coming lake draw down. Where dewatering is necessary, the
dewatering discharge will be filtered to DWQ Water Quality Standards prior to release.
New Boathouse Foundation (Presast Segmental Block) = 104 LF
New Boulder Seawall = 25 LF
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
5b.
5c.
5d.
5e.
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose
(acres)
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
number
of pond
P1
P2
5f. Total
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
Page 7 of 12
PCN Form — Version 1.3 December 10, 2008 Version

6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If any impacts require mitigation, then you MUST fill out Section D of this form.
6a.
❑ Neuse L1 Tar -Pamlico ❑Other:
Project is in which protected basin?
❑ Catawba ❑ Randleman
6b.
6c.
6d.
6e.
6f.
6g.
Buffer impact
number—
Reason
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
for
Stream name
mitigation
(square feet)
(square feet)
Temporary T
impact
required?
❑Yes
B1 ®PDT
❑ No
B2 ❑P❑T
El Yes
❑ No
El Yes
B3 ❑P❑T
❑ No
6h. Total buffer impacts
6i. Comments:
D. Impact Justification and Mitigation
1. Avoidance and Minimization
la. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The Boathouse Foundation and Seawall construction is the minimual necessary for bank stabilization. A dry work area will be
created to comply with Water Quality Standards.
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
To minimize disturbance during construction, the work will be accomplished with the smallest mechanical equipment
practicable. Turbidity curtains will be used around the work areas as needed.
Seawall work will be accomplished "in the dry" by installing a temporary coffer dam around the proposed work area or by
accomplishing the work during the lake draw -down.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
❑ Yes ®No
impacts to Waters of the U.S. or Waters of the State?
2b. If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
❑ Mitigation bank
2c. If yes, which mitigation option will be used for this
El Payment to in -lieu fee program
project?
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter)
Type
Quantity
Page 8 of 12
PCN Form —Version 1.3 December 10, 2008 Version

3c.
Comments:
4.
Complete if Making a Payment to In -lieu Fee Program
4a.
Approval letter from in -lieu fee program is attached.
❑ Yes
4b.
Stream mitigation requested:
linear feet
4c.
If using stream mitigation, stream temperature:
❑ warm ❑ cool ❑cold
4d.
Buffer mitigation requested (DWQ only):
square feet
4e.
Riparian wetland mitigation requested:
acres
4f.
Non -riparian wetland mitigation requested:
acres
4g.
Coastal (tidal) wetland mitigation requested:
acres
4h.
Comments:
S.
Complete if Using a Permittee Responsible Mitigation Plan
5a.
If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
6.
Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation?
❑ Yes ❑ No
6b.
If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)
Multiplier
6e.
Required mitigation
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g.
If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h.
Comments: Should project exceed 10% or 100' in 1000', a trout buffer waiver will be sought from NCDENR - Div of Land
Resources
Page 9 of 12
PCN Form — Version 1.3 December 10, 2008 Version

E.
Stormwater Management and Diffuse Flow Plan (required by DWQ)
1.
Diffuse Flow Plan
1 a.
Does the project include or is it adjacent to protected riparian buffers identified
❑ Yes ® No
within one of the NC Riparian Buffer Protection Rules?
1b.
If yes, then is a diffuse flow plan included? If no, explain why.
❑ Yes ❑ No
Comments:
2.
Stormwater Management Plan
2a.
What is the overall percent imperviousness of this project?
%
2b.
Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c.
If this project DOES NOT require a Stormwater Management Plan, explain why:
2d.
If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
❑ Certified Local Government
2e.
Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3.
Certified Local Government Stormwater Review
3a.
In which local government's jurisdiction is this project?
❑ Phase 11
[-I NSW
3b.
Which of the following locally -implemented stormwater management programs
El USMP
apply (check all that apply):
❑ Water Supply Watershed
❑ Other:
3c.
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑ No
attached?
4.
DWQ Stormwater Program Review
❑ Coastal counties
❑ HQW
4a.
Which of the following state -implemented stormwater management programs apply
❑ ORW
(check all that apply):
❑ Session Law 2006-246
❑ Other:
4b.
Has the approved Stormwater Management Plan with proof of approval been
❑Yes ❑ No
attached?
5.
DWQ 401 Unit Stormwater Review
5a.
Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes ❑ No
5b.
Have all of the 401 Unit submittal requirements been met?
❑ Yes ❑ No
Page 10 of 12
PCN Form —Version 1.3 December 10, 2008 Version

F.
Supplementary Information
1.
Environmental Documentation (DWQ Requirement)
1a.
Does the project involve an expenditure of public (federal/state/local) funds or the
❑ Yes
® No
use of public (federal/state) land?
1b.
If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
❑ Yes
❑ No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c.
If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
❑ Yes
❑ No
letter.)
Comments:
2.
Violations (DWQ Requirement)
2a.
Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
❑ Yes
®No
or Riparian Buffer Rules (15A NCAC 2B.0200)?
2b.
Is this an after -the -fact permit application?
❑ Yes
®No
2c.
If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3.
Cumulative Impacts (DWQ Requirement)
3a.
Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes
®No
additional development, which could impact nearby downstream water quality?
3b.
If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4.
Sewage Disposal (DWQ Requirement)
4a.
Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
N.A.
Page 11 of 12
PCN Form — Version 1.3 December 10, 2008 Version

5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
❑ Yes ®No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
❑ Yes ® No
impacts?
El Raleigh
5c. If yes, indicate the USFWS Field Office you have contacted.
❑ Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ®No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
❑ Yes ® No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
8. Flood Zone Designation (Corps Requirement)
Ba. Will this project occur in a FEMA -designated 100 -year floodplain?
❑ Yes ❑ No
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodplain determination?
Joe Gladden
r C�c G CZ1;
Applicant/Agent's Printed Name
Date
001DO . 3-012-E
Applicant/Agent's Signature
(Agent's signature is valid only if an authorization letterfrom the applicant
isprovided.)
Page 12 of 12
PCN Form — Version 1.3 December 10, 2008 Version
!S

NEW o DG°aMOUSC FDDNDD G° Y N alld BOULDER R DEAWALL
Madden Resoodance
LM #38 If11[5l'1Nad Mack IIF" W 7
02KOl1VBY 1JDIII1 paflyq Lake II0/n1(J1 8% MC
GENERAL NOTES:
1.0 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, NCDENR Division
Water Quality 401 permit requirements, NC Sedimentation Pollution
Control Act, and all other applicable codes, ordinances, and
regulations. The Contractor shall coordinate all work with the Lake
Toxoway Operations Manager, 16801 Rosman Hwy, Lake Toxaway, NC
28747.
5.0 The Contractor shall exercise care to preserve the natural
landscape and waterways and shall conduct the work so as to
of prevent any unnecessary destruction, scaring, or defacing of the
natural surroundings in the vicinity of the work. All unnecessary
destruction, scarring, damage or defacing of the natural landscape
shall be corrected at the contractor's expense.
2.0 Contractor shall verify and establish all Elevations prior to
beginning work. 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. Do not locate any part
of the work within any right—of—way, set back, encroachment,
easement, trout stream buffer zone (or other buffer zone or set
back), unless permitted to do so. Do not allow fresh concrete to
contact lake waters.
3.0 All footers and slabs shall bear on satisfactory insitu material
having a minimum bearing capacity of 2000 psf. No portions of the
foundation shall bear of fill dirt or fill soil. Contractor shall verify
that the site has stable geotechnical conditions. Top 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 (19 slope).
4.0 Where suspect foundation conditions are encountered, additional
over excavation may be required. This work may include:
4.1 Dewater excavation.
4.2 Excavate suspect subgrade down to satisfactory insitu material
having a minimum bearing capacity of 2000 PSF.
4.3 Line excavation with a geotechnical fabric equal to Mirafi 500X.
4.4 Backfill excavation to the desired subgrade elevation with #57
clean stone.
4.5 Provide 6 mil poly between stone and concrete.
4.6 Construct foundation in accordance with the foundation plan
designed by others.
6.0 All construction materials and debris shall be removed from the
site upon completion of the project and the area shall be graded
such that all surfaces drain naturally, blend with the natural terrain
and are left in a condition that facilitate sown ground covers and
natural revegetation.
7.0 The Contractors activities shall be performed by methods that
will prevent entrance, or accidental spillage, of solid matter,
contaminants, debris, or other pollutants and wastes into streams,
Flowing or dry watercourses, lakes or underground water sources.
8.0 Runoff and discharge shall be monitored to insure that no
sediment is discharged to the downstream watercourse.
9.0 TURBIDITY CONTROL. The Contractor shall not violated water
quality stream standards during the performance of this work. The
Turbidity Level in the lake waters shall not exceed 10 NTUs at any
time during performance of this work pursuant to 15A NCAC 028.0211
(3)(k). The Contractor shall employ any and all methods necessary to
prevent a violation of the Turbidity Standards. These measures
include, but are not limited to; turbidity curtains around the work,
haybails, silt fence, stone check dams, etc. Where turbidity curtain
are necessary, curtains shall remain in place until the turbidity in the
work areas return to original background levels.
10.0 HABITAT CONSERVATION. Shallow water bottom and complex
shoreline structure, most notably fallen trees and other large woody
debris (LAID), are important spawning and foraging habitats for
various sunfish, largemouth bass, and other fishes in the lake.They
are also used by many reptiles and birds for perching, basking, and
foraging areas. These areas shall be preserved to the largest extent
possible. Such habitat shall only be removed in areas where it
creates a hazard to watercraft navigation and only to the controlling
depth in the navigation channels.
CONDITION FOR USE OF THIS PLAN — By accepting this plan, you and
any others to whom it is distributed, agree to a strict limitation of
liability for Terry E. Allen PE, T.E. ALLEN ENGINEERING, P.C., and its
employees to an amount not to exceed the fee paid in hand.
Preliminary — Not for Construction
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SHELT I or

5.0 The Contractor shall exercise care to preserve the natural
landscape and waterways and shall conduct the work so as to
prevent any unnecessary destruction, scaring, or defacing of the
natural surroundings in the vicinity of the work. All unnecessary
destruction, scarring, damage or defacing of the natural landscape
shall be corrected at the contractor's expense.
6.0 All construction materials and debris shall be removed from the
site upon completion of the project and the area shall be graded
such that all surfaces drain naturally, blend with the natural terrain,
and are left in a condition that facilitate sown ground covers and
natural revegetation.
7.0 The Contractor's activities shall be performed by methods that
will prevent entrance, or accidental spillage, of solid matter,
contaminants, debris, or other pollutants and wastes into streams,
flowing or dry watercourses, lakes or underground water sources.
8.0 Runoff and discharge shall be monitored to insure that no
sediment is discharged to the downstream watercourse.
9.0 TURBIDITY CONTROL. The Contractor shall not violated water
quality stream standards during the performance of this work. The
Turbidity Level in the lake waters shall not exceed 10 NTUs at any
time during performance of this work pursuant to 15A NCAC 028.0211
(3)(k). The Contractor shall employ any and all methods necessary to
prevent a violation of the Turbidity Standards. These measures
include, but are not limited to; turbidity curtains around the work,
haybails, silt fence, stone check dams, etc. Where turbidity curtain
are necessary, curtains shall remain in place until the turbidity in the
work areas return to original background levels.
10.0 HABITAT CONSERVATION. Shallow water bottom and complex
shoreline structure, most notably fallen trees and other large woody
debris (LWD), are important spawning and foraging habitats for
various sunfish, largemouth bass, and other fishes in the lake. They
are also used by many reptiles and birds for perching, basking, and
foraging areas. These areas shall be preserved to the largest extent
possible. Such habitat shall only be removed in areas where it
creates a hazard to watercraft navigation and only to the controlling
depth in the navigation channels.
CONDITION FOR USE OF THIS PLAN — By accepting this plan, you and
any others to whom it is distributed, agree to a strict limitation of
liability for Terry E. Allen PE, T.E. ALLEN ENGINEERING, P.C., and its
employees to an amount not to exceed the fee paid in hand.
EQUIPMENT LIST
Bobcat 330 Trackhoe (or equal)
11.0 A Trout Buffer Variance is not anticipated to be necessary.
However, if during the course of the work it is determined that more
that 10% of the trout buffer may be disturbed, the Contractor shall
prepare and submit a Variance request pursuant to 15A NCAC
048.0125. This variance shall be made to the NCDENR — Division of
Land Resources.
11.1 TROUT STREAM BUFFER REQUIREMENTS — No land disturbing
activity during periods of construction or improvements to land shall
be permitted in proximity to a lake or natural watercourse unless a
buffer zone is provided along the margin of the watercourse of
sufficient width to confine visible siltation within the twenty—five
percent (25%) of the buffer zone nearest the land disturbing
activity. Waters that have been classified as trout waters by the
Environmental Management Commission shall have an undisturbed
buffer zone 25 feet wide or of sufficient width to confine visible
siltation within the twenty—five percent (257) of the buffer zone
nearest the land disturbing activity, whichever is greater. Provided,
however, that the Sedimentation Control Authority may approve plans
which include land disturbing activity along trout waters when the
duration of said disturbance would be temporary and the extent of
said disturbance would be minimal. All tributaries to trout streams
(named and unnamed) take on the trout classification, unless the
tributaries have another specified water quality classification.
11.1.1 The 25 foot trout buffer zone shall be measured from the top
of bank.
11.1.2 The disturbance is temporary and minimal when the
disturbance is limited to a maximum of 10% of the buffer zone within
the tract such that no more than 100 linear feet of disturbance
occurs in every 1000 feet of buffer zone. These disturbances can be
approved by the NCDENR Land Quality Regional Office staff on an
Erosion Control Plan and no variance is needed. Most of these types
of disturbances are for such activities such as bridge construction,
culvert installation, and installation of sewer and utility lines
perpendicular to the trout stream.
11.1.3 Longer lengths of the buffer zone may be disturbed with the
approval of the NCDENR Division of Land Resources Director.
IMPACTS BELOW NORMAL POOL ELEVATION I
New Boulder Seawall
25 Ftx4Ft
Boathouse Foundation
104 FT x 4 FT
TOTAL IMPACT
= 100 SF
=416 SF
= 516 SF (0.02 Acres)
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SHEETYOFL

BOATHOUSE FOUNDATION
oE
SEAWALL TO BE CONSTRUCTED WITH
PRECAST CONCRETE TOXAWAY BLOCK o—¢ryn
Adjust height of seawall as Natural Stone Veneer (Optional), o �iya°j•
necessary to maintain 18" specified by Others Grade
freeboard above normal pool
elevationoNc0
#6 epoxy coated vertical dowel bar
continuous through all segmental blocks U Izz
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COURSE below. All cells to grouted solid w/ 4000 r E
psi hydraulic cementious grout suitable
Normal Pool Elev. (3010CD
I for underwater application. CD WE
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LLI � 2;®
Im��
m � Non—woven needle punched geotextile w
.1- w L rn co3RSE II fabric between stone fill and earth
Adjust height of seawall too '�� o f subgrade Z mBm_
accommodate actual > co
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topographic conditions. Z
a. aO I_ I �. W 3
COURSE 1—FT Thick Chimney Drain behind wall. J a�
o 2 i Drainage Stone to be 4467 clean stone Q ��
from LBM Industries w N�
Lake Bott=III=11I—III—IIIIII—III—I $�
-I I I -I I I_I I IS I FI I F
COURS
Wrap stone aggregate footer with Mirafi v�
SOOX geotextile fabric or equal. ,y
............................. ..
OF J Z, -Vo
Stone Footer to be #467 clean stone (0 ¢ ¢ W 4 Z 8)
from LBM Industries Q 3 p To
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Existing Undisturbed Residuum with O z 5 F cil
minimum bearing capacity of 2000 PSF. 421, o cWi1 W O 3
Do not bear retaining wall on C1 Ca Cd Y w
unsatisfactory of unstable material."D ch cd
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t I `BOATHOUSE SEAWALL FOUNDATION DETAIL F_ O 1 a
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NOTES: ` O
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1. This Detail in only applicable to the Boathouse o
Foundation. All other seawalls shall be natural Z
boulders. See Sheet S-4. 3. Field verify all dimensions and material
quantities prior to ordering materials or beginning
2. By accepting this plan, you and any others to work. Contractor's verification shall include, but a
whom it is distributed, agree to a strict limitation c
9 not . limited to; shoreline bank height, 'E 11-lo-vla
of liability for Terry E. Allen PE, T.E. ALLEN depth—of—water at shoreline, subgrade bearing '0
ENGINEERING, P.C., and its employees to an capacity, length of seawall, block quantities, etc. o_ C-3
amount not to exceed the fee paid in hand.
SFICE 3OF4

1. All work shall be in accordance with the latest
edition of the NC State Residential Building Code
and all other applicable codes, ordinances and
requirements.
2. The Detail & Specifications shown herein are
for a Natural Boulder Retaining Wall.
3. Satisfactory material for fill or backfill behind
retaining walls and other structures shall be limited
to materials classified in ASTM D 2487 as GW, GP,
GM, GP—GM, GC, GP—GC, SW, SP, SM, SW—SM, SC,
SW, SC, SP—SM, SP—SC, CL, ML and CL—ML.
Satisfactory materials shall be placed in 6"
compacted lifts. Material shall be compacted to
95% of the maximum dry density. Classification of
backfill materials shall be determined in accordance
with ASTM D 2487 and the moisture—density
relations of soils shall be determined in accordance
with ASTM D 1557.
RIPRAP Toe Apron to
provide compensatory
habitat. NCDOT Class
2 Riprap.
STONE FOUNDATION PAD. Provide-
3'x16"xContinuous stone foundation
pod consisting of #57 clean stone
wrapped in Mirafi 50OX geotextile
fabric or equal.
ALL WORK SHALL BE
PERFORMED IN THE DRY
DURING THE LAKE
DRAW—DOWN.
4. BOULDERS. Boulders shall be sound natural
granite. Maintain minimum boulder wall thickness
of 2—ft. All boulders used in retaining walls shall
be sound durable granite. Provide chinking stones
to reduce gaps between boulders to less than 1
inch. Securely stack boulders to ensure that
boulders have a positive angle of 5—degrees or
more with respect to the horizontal.
5. WALL BATTER. Wall batter shall be 0.25H:1V
or shallower.
6. HORIZONTAL SCOUR SHOULDER. Maintain
minimum 3 feet wide horizontal shoulder at toe of
wall to prevent scour and undercut.
7. EMBEDMENT DEPTH. Embed toe of wall
minimum of 1—FT into undisturbed residuum
8. FOUNDATION BEARING AREA. locate boulder
retaining wall foundation on undisturbed residuum
with a minimum bearing capacity of 2,000 PSF.
Retaining
Wall
See Note 2
9. FINISH GRADE BEHIND WALL. Provide
3H:1V or shallower.
10. CHIMNEY DRAIN. Provide No. 57 clean
stone wrapped in non—woven needle punched
geotextile fabric with a minimum thickens of
1—foot.
12. BLANKET DRAIN. Provide No. 57 clean
stone wrapped in non—woven needle punched
geotextile fabric with a minimum thickens of
1—foot.
13. STONE FOUNDATION PAD. Provide
3'x16"xContinuous stone foundation pad
consisting of #57 clean stone wrapped in
Mirafi 50OX geotextile fabric or equal.
14. This is a Conceptual Retaining Wall Detail
The location, alignment, and up slope
embankments & retaining walls were designed
by others. By accepting this Plan, you and
any others to whom it is distributed, agree to
a strict limitation of liability for Terry E. Allen
PE, T.E. ALLEN ENGINEERING, P.C., and its
employees to an amount not to exceed the
fee paid in hand.
Non—woven needle punched geotextile fabric.
Chimney Drain Behind Wall. Provide No. 57
clean stone wrapped in non—woven needle
punched geotextile fabric with a minimum
thickens of 1—foot.
Mirafi 50OX geotextile
fabric or equal.
Existing Undisturbed Residuum with minimum
bearing capacity of 2000 PSF. Do not bear
retaining wall on unsatisfactory of unstable
material.
BOULDER SEAWALL DETAIL
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