20240174 Ver 1_USACE Permit_20240412

DEPARTMENT OF THE ARMY
U.S. ARMY CORPS OF ENGINEERS, WILMINGTON DISTRICT
ASHEVILLE REGULATORY FIELD OFFICE
151 PATTON AVENUE SUITE 208
ASHEVILLE NC 28801
April 12, 2024
Regulatory Division
2024-00198
Scott Millar
Sweetgrass Community Association
450 South Orange Avenue
Orlando, FL 32801
Dear Mr. Millar:
This letter is in response to the Pre -Construction Notification (PCN) you submitted to
the Wilmington District, Asheville Regulatory Field Office on January 23, 2024, for a
Department of the Army Nationwide permit (NWP) verification. This project has been
assigned the file number 2024-00198 and is known as the Sweetgrass/Boone Fork
Stabilization. This file number should be referenced in all correspondence concerning
this project.
A review of the information provided indicates that the proposed work would include
stream restoration to approximately 253 linear feet of Boone Fork and 0.01 acre of
wetlands. This activity, as described, complies with all terms and conditions of the. The
project area is illustrated on the enclosed site plans/maps and located at Latitude
36.126271 and Longitude-81.744827, near 188 Blue Lake Drive, in Blowing Rock,
Watauga County, North Carolina.
We have determined that the proposed work is authorized by Nationwide #13
pursuant to authorities under Section 404 of the Clean Water Act (33 U.S.0 § 1344).
The proposed work must be accomplished in strict accordance with the general permit
conditions, any regional conditions, the application materials, and the enclosed plans. A
special condition of this authorization prohibits in -stream work from October 15 to April
15 to avoid/minimize impacts to trout spawning as recommended in the attached letter
from the North Carolina Wildlife Resources Commission. The other recommendations
noted are for your consideration and to be implemented where practicable.
If the extent of the project area and/or nature of the authorized impacts to waters are
modified, a revised PCN must be submitted to this office for written approval before
work is initiated. Any violation of permit conditions or deviation from your submitted
plans may subject the permittee to enforcement action.
This verification is valid until March 14, 2026, unless prior to this date the subject
NWP(s) is suspended, revoked, or is modified such that the activity no longer complies

with the terms and conditions of this NWP. If you commence or are under contract to
commence this activity before the date that the relevant NWP is modified or revoked,
you will have 12 months from the date of the modification or revocation of the NWP to
complete the activity under the present terms and conditions of this NWP.
This NWP verification does not preclude the necessity to obtain any other Federal,
State, or local permits, licenses, and/or certifications, which may be required.
If you have any questions related to this verification or have issues accessing
documents referenced in this letter, please contact Amanda Fuemmeler, Project
Manager of the Asheville Regulatory Field Office at [phone] x4225, by mail at the
above address, or by email at [e-mail]. mi1. Please take a moment
to complete our customer satisfaction survey located at
https://regulatory.ops.usace.army.miI/customer-service-survey/.
Sincerely,
OUW-0-��
Amanda Jones Fuemmeler
Project Manager
Enclosures
Cc: Brushy Fork Environmental Consulting, Inc., Attn: Adam Williams (via email)

Compliance Certification Form
File Number: 2024-00198 County: Watauga
Permittee: Scott Millar
Sweetgrass Community Association
Project Name: Sweetgrass/Boone Fork Stabilization
Date Verification Issued: 4/12/2024
Project Manager: Amanda Fuemmeler
Upon completion of the activity authorized by this permit and any mitigation required by
the permit, sign this certification and return it to the following address:
[e-mail]
Please note that your permitted activity is subject to a compliance inspection by a U. S.
Army Corps of Engineers representative. Failure to comply with any terms or conditions
of this authorization may result in the Corps suspending, modifying or revoking the
authorization and/or issuing a Class I administrative penalty, or initiating other
appropriate legal action.
hereby certify that the work, and mitigation (if applicable), authorized by the above
referenced permit has been completed in accordance with the terms and conditions of
the said permit including any general or specific conditions.
Date Authorized Work Started:
Completed:
Describe any deviations from permit (attach drawing(s) depicting the deviations):
*Note: The description of any deviations on this form does not constitute approval by the Corps.
Signature of Permittee Date

® North Carolina Wildlife Resources Commission 9
Cameron Ingram, Executive Director
February 25, 2024
Ms. Amanda Fuemmeler
U.S. Army Corps of Engineers, Regulatory Branch
151 Patton Avenue, Room 208
Asheville, North Carolina 28801-5006
SUBJECT: Sweetgrass
Boone Fork and Wetlands, Watauga County
Dear Ms. Fuemmeler:
Biologists with the North Carolina Wildlife Resources Commission (NCWRC) reviewed an
application to stabilize and dredge 253 ft of Boone Fork and permanently impact 0.004 acre and
temporarily impact 0.006 acre of wetland in Watauga County. Our comments on this application
are offered for your consideration under provisions of the Clean Water Act of 1977 (33 U.S.C.
466 et. seq.) and Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-
667d).
There are Rainbow Trout and Brown Trout in the vicinity of the project, and in -stream activities
should be avoided between October 15 and April 15 in order to minimize impacts to trout
reproduction.
The application proposes to stabilize an eroding reach of Boone Fork by installing a rock vane
and boulder revetment, sloping stream banks, and planting a riparian buffer with livestakes and
seed. Flows would be diverted around in -stream work areas with boulder coffer dams. An area of
Boone Fork at the confluence with Blue Lake would be dredged of built-up sediment.
We offer the following recommendations to minimize impacts to the aquatic community:
1. In -channel work should be accomplished as quickly as possible and vigilance used in
sediment and erosion control during site preparation, construction, and clean up. Disturbed
areas should be seeded, mulched and/or matted as soon as possible, preferably at the end of
each work day.
2. Any erosion control matting used should be free of nylon or plastic mesh, as this type of
mesh netting frequently entangles wildlife and is slow to degrade, resulting in a hazard that
may last for years.
Mailing Address: Habitat Conservation • 1721 Mail Service Center • Raleigh, NC 27699-1721
Telephone: [phone] • Fax: [phone]

Sweetgrass Page 2 February 25, 2024
Boone Fork and wetlands, Watauga Co
3. In -stream activities should be done outside the October 15 to April 15 trout moratorium to
minimize impacts to Brown Trout reproduction.
4. It appears that the planted woody buffer will be quite narrow, as only livestakes will be used.
We recommend that a woody buffer of at least 30 feet be planted on both sides of the stream
as infrastructure allows in order to ensure project success. A wide forested buffer can ensure
greater bank stability, filter overland pollutants, and provide habitat for birds and other
wildlife.
5. Impacts to the existing riparian forest on the upstream portion of the project should be
minimized as much as possible.
Thank you for the opportunity to review and comment on this project. Please contact me at
[phone] if you have any questions about these comments.
Sincerely,
Andrea Leslie
Mountain Region Coordinator, Habitat Conservation Program
cc: Susan Cragg, Brushy Fork Environmental
Seren Homer, NC Division of Water Resources

BOONE FORK STABILIZATION
WATAUGA COUNTY, NC
SHEETINDEX
COVER
1
OVERALL SITE PLANS
2
PLAN AND PROFILE
3
CROSS -SECTIONS 1-6
4-5
TYPICAL CROSS -SECTIONS
6
MORPHOLOGICAL TABLES
7
CONSTRUCTION DETAILS AND SPECIFICATIONS
Cl-C2
EROSION CONTROL DETAILS AND SPECIFICATIONS
El-E4
GENERAL NOTES:
1. STREAM ASSESSMENT DATA (LONGITUDINAL PROFILE,
CROSS -SECTIONS, ETC.) PRESENTED HEREIN COLLECTED BY
BFEC/BFED.
2. CONTOUR DATA PRESENTED IN THIS DOCUMENT WAS COLLECTED
FROM USGS 2022 EARTHEXPLORER. (2' and 10' CONTOURS).
3. HORIZONTAL AND VERTICAL GRID CONTROL TIED TO PROJECT BY
BFED. SURVEY DATA USED FOR DESIGN IS RELATIVE TO ITSELF
AND APPROXIMATELY SET TO REAL WORLD COORDINATES BASED
ON LIDAR DATA.
4. PRIOR TO CONSTRUCTION, BFEC WILL FLAG TREES APPROVED TO
BE REMOVED DURING CONSTRUCTION. ONLY REMOVE TREES
THAT ARE MARKED BY FLAGGING PRIOR TO CONSTRUCTION. ALL
OTHER TREES SHALL BE PROTECTED AND AVOIDED DURING
GRADING ACTIVITIES, INCLUDING ROOT STRUCTURES. CEASE
GRADING WHEN MATURE TREE ROOTS ARE ENCOUNTERED.
EROSION AND SEDIMENT CONTROL NOTES:
1. ONCE SITE CONSTRUCTION WITHIN AN AREA HAS CEASED ALL
DISTURBED AREAS WILL BE IMMEDIATELY SEEDED
(TEMPORARY & PERMANENT SEED), MATTED (COIR AND
COCONUT FIBER EROSION CONTROL BLANKET, NAG
C700BN), AND STABILIZED (SEE SHEET El-E2).
2. LIVE STAKES AND BIODEGRADABLE MATTING STAKES WILL BE
USED TO SECURE THE MATTING.
3. BROADCAST SEEDING RATES WILL BE AS SPECIFIED ON
SHEET E1.
4. NATIVE SHRUB AND TREE SPECIES WILL BE PLANTED
THROUGHOUT THE PROJECT AREA AT A RATE OF 400+
STEMS/ACRE, SECURING NEAR BANK AREAS AND PROVIDING
FUTURE SHADING OF CHANNEL (SEE CHANNEL
REVEGETATION DETAIL SHEET E1).
5. PRECAUTIONS WILL BE TAKEN TO KEEP HEAVY EQUIPMENT
OUT OF THE STREAM CHANNEL EXCEPT WHERE ABSOLUTELY
NECESSARY TO INSTALL BANK STABILIZATION/ENHANCEMENT
MEASURES AND IN -STREAM STRUCTURES.
6. NO CONSTRUCTION ACTIVITIES WILL OCCUR OUTSIDE THE
CONSTRUCTION LIMITS AS SHOWN ON THE SITE PLAN.
60 % PROGRESS DRAWINGS
DO NOT USE FOR CONSTRUCTION
Sheet
1

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LEGEND
S w e e t g rc EXISTING TOP OF BANK
jLake EXISTING THALWEG
i
2' EXISTING CONTOURS
10' EXISTING CONTOURS
PROPERTY BOUNDARY
/ CONTROL POINT
/ EXISTING TREES
PROPOSED DESIGN
PROPOSED
CENTERLINE
PROPOSED TOP OF
/ BANK
PROPOSED BENCH
CONSTRUCTION
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2+00
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Install Bou\0erevetment
Grade bank to narrowow channel
to 3:1 slope, o and protek toe.
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Boone Fork Centerline
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EXISTING
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Bench
Riffle
Scour Pool
Bankfull Area (A-bkf, sq ft)
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45.6

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Boone Fork Morphological Table
Stream Assessment Parameters
Existing Condition
Proposed Condition
Station
0+00 - 4+14
1+30 - 4+04
Drainage Area (sq mi)
2.01
2.01
Stream Type
Cab
C3c
Bankfull Area (sq ft)
Avg: 46.4/ Range: 26.7-85.1
Avg: 33.7/ Range: 30.4-35.3
Bankfull Width (ft)
Avg: 38.4/ Range: 26.2-56.5
Avg: 25.0/ Range: 25.0-25.0
Bankfull Depth (ft)
Avg: 1.2 / Range: 0.8-1.5
Avg: 1.3 /Range: 1.2-1.4
Bankfull Max Depth
Avg: 2.2 /Range: 1.6-3.2
Avg: 1.8 /Range: 1.8-1.8
Bankfull Width/ Depth Ratio
Avg: 31.8 / Range: 25.7-38.9
Avg: 19.2 /Range: 17.8-20.8
Floodprone Width
Avg: 118.9 / Range: 34.8-244.1
Avg: 132.E / Range: 94.0-184.0
Entrenchment Ratio
Avg: 1.8/Range: 1.3-2.4
Avg: 4.3/ Range: 3.8-4.8

f-
Restore disturbed area
with Riparian Seeding
(see Detail)
Streambank Matting
(see Detail)
Existing Ground
Proposed Ground
Header Rock
Streambed—Z
Footer Rock
Geotextile Liner
(if needed,see Note 3)
Section A - A View
N. T. S.
Wooden Stake
Backfill with suitable
alluvial material
(see Note 7)
BOULDER REVETMENT
Bankfull
Elevation
Flo
Rock Sill
(9' min.)
Notes:
1. Boulder Revetments shall be installed along the base of the design streambank toe at locations
and stream lengths designated in the Site Plans.
2. Footer, Header, and Sill Rock shall be min. 3 dia. long axis, min. 2' dia. intermediate axis and
min. 2' dia. height.
3. Geotextile Liner shall be medium weight non -woven polypropylene (Weight 7oz/sq yd; Tensile
Strength 180 Ibs). Geotextile Liner shall be installed if backfill is fine-grained, as approved by the
Project Engineer. Place Liner behind all rock layers and key in at the bottom. Trim excess or
visible fabric.
4. Footer Rocks shall extend below scour depth or to bedrock, whichever is shallower. The scour
depth is estimated to be the max. pool depth near the structure, unless otherwise specified.
5. Header Rocks must extend upwards above the normal flow water surface and have an even
grade along the length of the Revetment.
Geotextile Liner
(if needed,
see Note 3)
+I
Top of Bank
(Bankfull)
\_Edge of Water
at Normal Flow Header Rock
Footer Rock
Toe of Bank
Slope
'l\\l \\'
Backfill with suitable
alluvial material
(see Note 7)
f
Plan View
N. T. S.
b. Install two or more Header Rocks overlain and offset backwards moving up the bank if existing
substrate elevation is below that needed for Header Rock to extend up to normal flow
elevation or if additional protection is needed for exposed tree roots or other bank feature. Do
not exceed the inner berm elevation.
7. Footer Rocks and Header Rocks shall be backfilled with gravel alluvial material, if suitable size
and consistency is available. Suitable backfill shall have a minimum median diameter of 2" and
not exceed 9" dia. It shall drain quickly and support weight without shifting or sinking. For fine
sediment substrates, outside gravel may be needed for backfill and Footer Rocks shall be
supported with a layer of stone, as approved by the Project Engineer.
8. After Boulder Revetment has been installed, backfill streambank with clean soil fill material and
compact at the proposed bank angle.
9. Stabilize streambank with Riparian Seeding, Streambank Matting, and Livestaking (see Details).
a
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Apex Step Rock
�0.2'
Flow--z-►
Riffles ni -
Streambed Pool
Footer Rock Splash
Rock
Section A (At apex)
N. T. S.
Header Rock
Footer Rock
Splash Rock
_ Backfill
(see Note 2 and 3)
Existing
Streambed Geotextile Liner
Proposed (see Note 4 and 5)
Streambed
Section B (At vane arm)
N. T. S.
Bankfull Max
Depth 1.8'
CROSS VANE WITHOUT STEP
Edge of Water
at Normal Flow
Top of Bank
(Bankfull) y W
Y y} W W W
W Y
Apex Rocks
(see Note 8)Y3
V W
Y W
Header Rock W
41
Footer Rock
Arm
Height Arm Bankfull
1.4 Tie -In (see Note 9)
Arm Apex
% To
------' of Bank/Bankfull
�. o----:-----
J
• (J rj W W
J ink Toe
Footer Rock Existing Streambed
Proposed Streambed
Arm Profile View
N. T. S.
Cross Vane Structure Table
Cross
Apex
Arm
Apex
Bankfull
Total
Vane
Centerline
Thalweg
Apex EL
Bankfull
Tie -In EL
Structure
#
Station
EL (ft)
(ft)
EL (ft)
(ft)
Drop (ft)
y
1 +60.0 -
1 +84.2
3435.20
3435.40
3437.00
3436.80
0.20
Structures will be staked out by construction oversight staff prior to construction
Riffle Arm Apex Elevation,
(See Structure Table)
y44
J (CA�)"W
Y W Y j W Backfill with suitable
alluvial gravel -cobble
l` mix (see Note 2 and 3)
�l y
- Geotextile Liner
Run il,L (as needed,
© see Note 4 and 5)
/ �Arm length = 25.6
W Stream length = 24.2'
'� \_Rock Cutoff Sill,
2' min.
Glfde Arm Bankfull Tie -In Elevation
i y (See Structure Table, Note 9)
i
Flow W ` i Splash Rocks
. W ' (as needed)
ull Width = 25'- Excavate
Scour Pool
Plan View
N. T. S.
Structure Dimension Table
Parameter
1/3 Bankfull Width
8.3
Vane Arm Angle (deg)
19.0
Stream Length (ft)
24.2
Vane Arm Length (ft)
25.6
Vane Slope (%)
0.055
Vane Arm Height (ft)
1.4
Bankfull Max Depth (ft)
1.8
Structure Grade Drop (ft)
0.2
Notes: Structure keyed in at bankfull
Notes:
1. Header, Footer, and Sill Rocks shall be min. 3' dia.
long axis, min. 2' dia. intermediate axis, and min. 2'
dia. height.
2. Vane Arm Header and Footer Rocks shall be
backfilled with alluvial material composed of a
gravel -cobble mix if suitable size and consistency is
available. Suitable backfill shall have a min.
median diameter of approximately 2", and shall not
exceed 9". The material shall drain quickly, and
support weight without shifting or sinking. Larger
diameter rocks can be used at the apex of the arm
wedge for scour protection, installed below the
Arm Apex Elevation. Do not place sod or soil on top
of the Header Rocks nor use them to backfill
behind Vane Arm. Any topsoil placed along the
Vane Arm shall be for temporary erosion control
seeding and shall be no more then 1-2" depth. The
topsoil shall shall not extend above the elevation of
the Header Rocks.
3. Backfill behind the Vane Arm flush with the Header
Rock elevation until meeting the streambank
contour.
4. For finer sediment substrates, outside gravel shall be
brought in for backfill or Geotextile Liner shall be
installed (see note 5). Footer Rocks shall be
supported with a layer of stone to prevent sinking
or shifting, as approved by the Project Engineer.
5. Geotextile Liner shall be medium weight
non -woven polypropylene (Weight 7oz/sq yd;
Tensile Strength 180 Ibs). Place liner behind the arm
(upstream side), draped from top of rock structure
to bottom of Footer rock and extend a minimum of
half the trench bottom width. Trim excess or visible
fabric.
6. At the structure apex, extend Footer Rock below
scour depth or to bedrock, whichever is shallower.
(The scour depth is assumed to be the max pool
depth associated with the structure).
7. Step Height is the Total Structure Drop of the water
surface. Maximum water surface (structure) drop
across the Apex Rock is 0.2' measured along the
stream thalweg. See Section A and Structure Table.
8. The thalweg elevation shall be at the top of Footer
Rocks.
9. Structures will be keved in at bankfull elevation.
10. After vane arms are installed, stabilize all disturbed
streambank with Riparian Seeding, Streambank
Matting, and Livestakes (see Details).
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TYPICAL CHANNEL RE -VEGETATION PLAN VIEW DETAIL
SYMBOL
DESCRIPTION
Native tree and shrub (bareroot or 1-3 gallon
containers) species to be planted at a density
sufficient to provide 400 trees/acre at maturity
-floodplain species include but are not limited to:
Genus Species Common Name
Acer rubrum Maple, Red
Betula alleghaniensis Yellow Birch
Cephalanthus occidentalis Buttonbush
Corpus amomum Dogwood, Silky
Hamamelis virginiana Witch Hazel
Lindera benzoin Spicebush
briodendron tulipifera Poplar, Yellow
Oxydendrum arboreum Sourwood
Physocarpus sp. Ninebark
Platanus occidentalis Sycamore
Prunus serotina Cherry, Black
Quercus rubra Oak, Northern Red
Quercus shumardii Oak, Shumard
Sambucus nigra canadensis Elderberry, Common
Salix nigra Willow, Black
Tilia americana Basswood
Any substitutions must be approved by Project
Engineer.
*Do not plant Betula nigra or Jugulands nigra.
SYMBOL
DESCRIPTION
Native sod matting and/or erosion control fabric
are to be placed on near bank and disturbed
areas when available.
1. Seed immediately with Temporary Seed Mix.
2. Following construction, area to be seeded with
a permanent grass/herb mixture. Matting and
fabric are to be staked down with large staples
and/or native/woody stakes. See Slope Matting
detail.
3. Place livestakes in two rows with 5' spacing
between rows.Livestake species include:
Corpus amomum, Physocarpus opulifolius, Salix
serecia, Sambucus canadensis.
Any substitutions must be approved by Project
Engineer.
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Note:
Planting width will vary based on landowner compliance and project
specifications.
Sod -matting or —
coconut matting
applied to nearbank
areas of disturbance
PLAN VIEW
Top of Terrace
Combination of
container or bare -root
native tree &/or shrubs
(see riparian
planting plan for species)
Bankfull
Water Surface
CROSS-SECTION
Native Livestakes
INSPECTION AND MAINTENANCE:
This consists primarily of two components, stream
stabilization structures (J-Hooks, Cross vanes, etc.)
and planting of the stream banks and riparian
areas. In the event that the stream structures shift,
wash away, settle, or otherwise physically cannot
function as designed, contact BFEC/BFED. If the
new plantings experience a mortality rate of
greater than 25%, the dead/dying plants will need
to be replaced.
PERMANENT RIPARIAN SEED MIX (STREAMBANK AND
RIPARIAN BUFFER):
APPLY AT 20 LBS PER ACRE OF DISTURBANCE (per
specifications of seed supplier):
ERNST CONSERVATION SEED MIX ERNMX-304 (NC
MOUNTAINS RIPARIAN MIX) WHICH INCLUDES THE
FOLLOWING SPECIES:
SWITCHGRASS, INDIANGRASS, BIG BLUESTEM,
VIRGINIA WILDRYE, PARTRIDGE PEA, BLACKEYED
SUSAN, SWAMP MILKWEED, WILD BERGAMOT,
NARROWLEAF SUNFLOWER, OXEYE SUNFLOWER,
PURPLESTEM ASTER, BONESET, LICORICE SCENTED
GOLDENROD, NEW YORK IRONWEED
PERMANENT SEED MIX (OUTSIDE OF RIPARIAN
CORRIDOR):
APPLY AT 300 LBS PER ACRE OF DISTURBANCE (or per
specifications of seed supplier):
KENTUCKY BLUEGRASS/TALL FESCUE MIX (LAWN)
TEMPORARY SEED MIX AND SPECIFICATIONS:
Common Name Rate/Ac Optimal Planting
Rye grain 30 Ibs Aug 15 - May 15
Browntop millet 10 Ibs May 15 - Aug 15
Seedbed Preparation:
Disturbed soils within riparian areas will be
amended to provide an optimum environment for
seed germination and seedling growth. Surface
soils will be loose enough for water infiltration and
root penetration. Lime will be added to the soil to
ensure a pH level between 5.5 - 7. Fertilizer (18-46-0)
will be added to nutrient deficient areas. All
riparian areas will be raked to loosen compacted
soil prior to seeding.
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6"
Wire Fence min.
(if applicable) :�
Geotextile Fabric
Backfill and
compact soil
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Existing
Ground
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8"
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min.
min.
Steel Post
SILT FENCE
Max. 6' Spacing without fence
Max. 8' Spacing with fence
Steel 6"
Post min.
Wire/Plastic
Ties
24" c'
81. Existing S
min. Ground Q
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7 — I I I — - I I I - — I I IT, -.1 1 —.1 1 11111 1 11 b
BOttol Of 24" min.
Trench Geotextile
Fabric
PROFILE VIEW SECTION VIEW
NTS NTS
Notes:
1. Silt fence shall meet the requirements of the NC Erosion and
Sediment Control Planning and Design Manual (2013) Std
and Spec 6.62.
2. Do not install silt fence across areas of concentrated flow,
including streams, ditches, or waterways.
3. Silt fence is limited to fill heights of 10 ft or less, and shall not
exceed slope length corresponding to drainage area size
and slope (Table 6.62a).
4. Steel posts shall be 5' min. length, with 1.25 lb/linear ft steel.
Wooden stakes are not allowed.
5. Geotextile fabric shall comply with specifications in Table
6.62b. If Wire Fence reinforcement is needed, wire shall be
14 gauge min. with max. 6" mesh spacing and extend to
bottom of trench.
6. Wire or Plastic ties shall have 50 lb tensile strength min.
7. When two separate sections of geotextile fabric adjoin
each other, they shall overlap by 6" and be double folded.
8. Geotextile fabric shall be fastened with plastic or wire ties
securely to the posts at the top, vertical midpoint and
bottom of geotextile fabric.
9. The distance between the toe of the fill to the silt fence
shall be a minimum of 5'.
SLOPE MATTING
/-Use key trench on top edge.
Flow
Space wood
stakes every 36" in PLAN VIEW
diamond shape NTS
pattern.
Fill and compact
6" min. trench with topsoil
18" 3
min. 1
min.
min. overlap
Bottom Edge
Note: Rotate stakes 20' towards
direction of flow to prevent uplift.
ion Control Matting
Extend matting below
normal flow elevation
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NTS
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Notes:
1. Streambank Matting shall be applied to slopes 3:1 or greater, including
all streambanks and terrace slopes.
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2. Sfreambank Matting shall be 700 gram coir fiber matting (20.3 oz./sq.
N
yd.). Rolls shall be C min. width.
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3. Seed and mulch the ground surface before installing matting (use native
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Riparian Seed mix plus a temporary cover crop).
4. Alternate fastening devices require Project Engineer's approval before
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use.
5. Extend matting 18" min. past the top of bank or top of slope. Upstream
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fabric overlaps downstream fabric by 6 in.
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6. For streambanks, extend matting below normal flow elevation to
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promote saturation in order to weigh the matting down and encourage
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a biofilm seal with the underlying soil.
7. For streambanks, do not trench or stake the bottom of the matting to
avoid disturbance and instability along the toe of slope.
8. Tuck matting behind and under toe protection measures such as
Sheet
revetments and rock.
E2

CONSTRUCTION ACCESS
24' Stone
PLAN VIEW
NTS
Stone,-•
Geotextile
SECTION A VIEW
NTS
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Notes:
1. Construction Access shall be installed along designated
vehicular access routes needed during construction.
2. Strip topsoil and stockpile for reapplication following
construction.
3. Excavate footprint of access road down 8" and install
geotextile liner. Geotextile Liner shall be medium weight
non -woven polypropylene (Weight 7oz/sq yd; Tensile
Strength 180lbs).
4. Place 2-4" clean washed stone over Geotextile Liner.
5. Ensure road slope is adequate for drainage, repairing any
areas with water immediately.
6. Replenish stone layer when surface rock becomes
compressed >2", or stone becomes covered with fine
sediment.
7. Remove Construction Access following construction
activities according to the Construction Sequence. Grade
terrain to original contour and plant permanent seeding as
needed.
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TEMPORARY CONSTRUCTION
ENTRANCE/EXIT
10' min.
10' min.
0
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10' min. Clean washed stone 2"-4" dia.,
8" depth underlain with Geotextile Fabric
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Temporary Drainage Pipe, r
as needed
aved Road w��,,,,K
PLAN VIEW
NTS I I I I '
Existing
50' min _ Ground
2% slope
Paved Road
Clean washed stone 2"4' dia.,
3" min. undercut prior to 8" depth
placement of stone Non -woven Geotextile Fabric shall
be placed under entire width/length
Temporary Drainage Pipe, of stone
as needed
SECTION VIEW
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NTS
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Notes:
1. Temporary Construction Entrance specifications are
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described in North Carolina Erosion and Sediment
v,
Control Planning and Design Manual (2013) Std and
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Spec 6.06.
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2. Geotextile Liner shall be medium weight non -woven
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polypropylene (Weight 7oz/sq yd; Tensile Strength
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180 Ibs).
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3. Replenish stone when surface rock becomes
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compressed < 8", stone becomes covered with fine
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sediment, or sediment is visible on the paved road.
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MUD MATS
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Wet areas, depressions,
tributaries, or
drainage ditches
Some grading may be required
on wetland decent.
Notes:
l . Mud mats shall be used within the Construction Access Path to cross
wetland areas for accessing the stream and staging areas while limiting
disturbance to the existing terrain.
2. Mud mats are commonly available for purchase or rental, dimensions
may vary.
3. Mud mats can be stacked or place in a variety of ways to get equipment
and materials to the work site with minimal disturbance.
4. Some minor grading may be required to prepare surface for the use of
mats (See Overall Site Plan for Construction Access Path route).
5. Limit site clearing to the area required for the access route.
b. After work is completed, re -grade the site to a natural appearance, seed
and mulch, and plantings of appropriate wetland vegetation when
required.
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