20210806 Ver 1_Pre-Filing Meeting Request_20210420

DWR Pre -Filing Meeting Request Form
ID#*
Regional Office*
Reviewer List*
20210806
Version*
1
Asheville Regional Office - [phone]
Amy Annino
Pre -Filing Meeting Request submitted 4/20/2021
Contact Name *
Contact Email Address*
Project Name*
Project Owner*
Project County*
Heather Cotton
[e-mail]
Marion Catawba River Greenway Bank Restoration (Zeta)
City of Marion
McDowell
Owner Address: Street Address
PO Drawer 700
Address Line 2
City State / Province / Region
Marion NC
Fbstal / Zip Code Country
28752 United States
Is this a transportation project?* r Yes (' No
Type(s) of approval sought from the DWR:
f7 401 Water Quality Certification - I— 401 Water Quality Certification -
Regular Express
I— Individual Permit I— Modification
F Shoreline Stabilization
Does this project have an existing project ID#?*
r Yes (' No
Do you know the name of the staff member you would like to request a meeting with?
No
Please give a brief project description below and include location information. *

The Catawba River in Marion, North Carolina has experienced
significant riverbank erosion after significant rain events and tropical
storms. A study was performed by Jennings Environmental PLLC in
December 2020 to determine areas in need of bank stabilization and
restoration. A copy of the report is attached to this pre -filing request
form.
The Catawba River Bank Stabilization Plan assessed approximately
6,000 linear feet of riverbank. The upstream extent of the study is
located where the Catawba River becomes proximate to the Joseph
McDowell Catawba Greenway at Latitude 35.701558, Longitude -
82.049985. The downstream extent is on the eastern side of the US
Highway 221 bridge located at Latitude 35.707224, Longitude -
82.036504. Portions of the right (southern) river bank are actively
eroding and threatening the integrity of the greenway trail and
landscape nursery.
Link to more information:
https://storymaps. a rcg is. com/stories/b5c7b38e 169449af977a96fa0f3
b25b7
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.
• I understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
• I 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
Submittal Date 4/20/2021

CATAWBA RIVER BANK STABILIZATION PLAN
Joseph McDowell/Catawba River Greenway, Marion, North Carolina
Submitted to McDowell Trails Association and City of Marion, North Carolina
Jennings Environmental PLLC
December 2020
MTA
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Jennings
Environmental

1. Introduction
This report provides the results of a study regarding river bank erosion along the Catawba River in the
vicinity of the Joseph McDowell/Catawba River Greenway in Marion, North Carolina. The study includes
an assessment of existing conditions and development of a plan for addressing restoration/stabilization
of eroding river banks. This report can be used for grant applications and funding allocations to
implement an environmental enhancement project.
Specifically, the study includes the following tasks:
• Analyze existing bank conditions along the Catawba River to identify and map areas
of concern for river bank erosion.
• Develop conceptual plans and estimated costs for recommended river bank
stabilization for each area of concern.
• Prioritize implementation of stabilization projects.
• Report findings with recommended implementation steps for addressing areas of
concern.
Overall project objectives are to stabilize river banks and adjacent trails through the application of
natural river restoration/stabilization techniques. Long-term benefits to the community would include
stable recreational trails, environmental education opportunities, improved environmental quality, and
native riparian vegetation.
Approximately 6,000 linear feet of river bank are included in this study. The upstream extent is at the
location where the Catawba River becomes proximate to the greenway (Latitude 35.701558, Longitude -
82.049985). The downstream extent is on the eastern side of the US Highway 221 bridge (Latitude
35.707224, Longitude -82.036504). Portions of the right (southern) river bank are actively eroding and
threatening the integrity of the greenway trail (Figures 1 and 2).
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
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Figure 1. Representative view of river bank erosion adjacent to the greenway (Site 3).
Figure 2. Representative view of river bank erosion adjacent to the greenway (Site 6).
Catawba River Bank Stabilization Plan
Jennings Environmental PLLC
3

2. River Bank Condition Assessment
Banks within the study reach of the Catawba River were assessed to document existing morphological
conditions, as well as opportunities and constraints that may affect potential management actions.
Seven discrete locations of bank erosion were identified and are summarized in Table 1. The attached
Appendix includes the following:
• Sheet 1: Location map
• Sheet 2: Aerial photography and site locations
• Sheets 3-9: Conceptual designs and summaries of existing conditions with photos
and measured river bank profiles for each site
• Sheets 10-13: Typical design details for recommended bank stabilization approaches
Table 1. Potential river bank stabilization sites.
Site
Length (feet)
Latitude
Longitude
Relative Priority
1
220
35.703373
-82.049127
Moderate
2
80
35.703804
-82.049065
Moderate
3
130
35.707009
-82.047038
High
4
240
35.707003
-82.045010
High
5
170
35.706666
-82.043958
Moderate
6
380
35.706811
-82.042919
High
7
20
35.707168
-82.039858
Low
Bank profile survey data were collected at the 7 sites. These profiles provide graphical representations
of the shapes of the river banks, which allow for visualization of bank heights and bank angles. Figure 3
shows an example of existing and design bank profiles that represents grading of a near -vertical, eroding
bank in order to achieve a narrow floodplain bench and stable bank slope.
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
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Site 4
96
95
94
43
Existing
— —Conceptual Design
/
92
/
/
91
90
89
!
88
87
1
86
85
84
0 5 10 15 20 25 30 35 40 45 50 55
Figure 3. Example bank profiles (Site 4) showing existing and conceptual design conditions.
Bank erosion rates and sediment loads were estimated using the BANCS approach (Rosgen, 2001). This
approach applies a field estimation of bank erosion hazard based on the Bank Erosion Hazard Index
(BEHI) and Near Bank Stress (NBS) at eroding bank locations. Table 2 lists the dominant BEHI and NBS
observations, along with estimated erosion rates, for each site. Factors included in this analysis that
contribute to river bank erosion and downstream sedimentation include the following:
• Channel incision, which prevents flood flows from accessing a floodplain for energy
dissipation. Degree of incision is measured using Bank Height Ratio (BHR).
• Soil composition (cohesiveness) in the river banks, which determines the ability of
the soil to resist erosion scour forces during high flows.
• Vegetation root composition (depth and density), which determines the
effectiveness of plant roots in enhancing soil resistance to erosive energy.
• Bank angle, which determines the susceptibility of banks to slumping and mass
wasting during high flows.
• Near bank stress (NBS), which relates to accelerated bank erosion where the depth,
slope, and velocity of flow increases in channel segments with tight meander bends,
deep pools, and transverse bars. NBS is evaluated using radius of curvature ratio
and other geomorphic parameters that indicate potential stressful conditions.
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
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Table 2. Estimated river bank erosion rates.
Site
Dominant
BEHI
Dominant
NBS
Erosion Rate
(cubic feet/year)
Erosion Rate
(tons/year)
Average Erosion Rate
(tons/ year/linear foot)
1
High
Moderate
176
7.2
0.03
2
Very High
Low
331
13.4
0.17
3
Very High
Low
749
30.4
0.23
4
Very High
Moderate
746
30.3
0.13
5
High
Moderate
155
6.3
0.04
6
Very High
Moderate
1982
80.4
0.21
7
High
Low
17
0.7
0.03
Sites 1-7 Total
4157
168.6
0.14
At the 7 sites, banks are highly erodible, with BEHI ranging from High to Very High. The NBS ranges from
Low to Moderate, as a result of the relative straightness of the river at these locations. The BANCS
analysis estimates an average annual sediment contribution of 169 tons from the 1,240 linear feet of
river bank that compose these sites. These results should be considered to be general estimates but can
be helpful in understanding the relative sediment contribution from each site. These relative
observations among the sites can be helpful with prioritization of reaches for potential
restoration/stabilization projects.
Sites 3, 4, and 6 stand out as the largest contributors to sedimentation within the study area. As a result
of this, and proximity of these eroding areas to the greenway, Sites 3, 4, and 6 were assigned a relative
priority of 'High'. Sites 1, 2, and 5 were assigned a relative priority of 'Moderate', with Site 7 being 'Low'.
3. River Bank Stabilization Approaches
River bank stabilization at these 7 sites along the Catawba River will reduce the volume of sediment
eroded from river banks. Additionally, such projects will improve water quality, habitat, and stability of
the river and greenway through applying natural river restoration/ stabilization techniques. Long-term
benefits to the community would include stable recreational trails, environmental education
opportunities, improved environmental quality, and native riparian vegetation.
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
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Suggested stabilization approaches for each of the 7 sites are described below and on Sheets 3 through
9 of the Appendix. Typical design details for bank stabilization components are shown on Sheets 10
through 13 of the Appendix. Although not specifically mentioned in the narratives below, vegetated
geolifts are a stabilization approach that could be used at any of the sites, especially in areas where
constraints prevent grading river banks to a 3:1 slope.
The typical design details in this report conceptual in nature and are NOT FOR CONSTRUCTION. These
conceptual plans should be evaluated for further design and permitting efforts. Decisions related to the
design approaches and prioritization should be made after a full evaluation of project goals and
resources, with input from stakeholders.
Site 1 (220 feet): The river bank at Site 1 has eroded to the extent that it could be rebuilt with the toe of
slope extending approximately 10 feet further into the river to match upstream and downstream
conditions. This additional width for the river bank would allow the trail to remain in its existing
location. At the toe of this bank, stacked boulders could be used to armor the bank for approximately 3
vertical feet above and below the water line. Above the boulder toe, the bank should be graded to a
stable (3:1 or flatter) slope and lined with biodegradable erosion control matting. As part of the grading,
the existing berm at the top of the river bank should be removed. A riparian buffer of native trees,
shrubs, and grasses should be planted along the rebuilt river bank.
Site 2 (80 feet): At the toe of the existing river bank, stacked boulders could be used to armor the bank
for approximately 3 vertical feet above and below the water line. Above the boulder toe, the bank
should be graded to a stable (3:1 or flatter) slope and lined with biodegradable erosion control matting.
This approach would allow the trail and fence to remain in their existing locations with approximately 8
feet between the trail and rebuilt river bank. A riparian buffer of native trees, shrubs, and grasses should
be planted along the river bank.
Site 3 (130 feet): At the toe of the existing river bank, stacked boulders could be used to armor the bank
for approximately 3 vertical feet above and below the water line. Above the boulder toe, the bank
should be graded to a stable (3:1 or flatter) slope and lined with biodegradable erosion control matting.
Due to the proximity between the existing trail and eroding bank, approximately 300 feet of the trail
would need to be re -aligned at least 10-20 feet away from the river. A riparian buffer of native trees,
shrubs, and grasses should be planted along the river bank.
Site 4 (240 feet): In addition to eroding river banks, the area of instability at Site 4 includes areas of
sediment and debris deposition in places where the bank has retreated. Unlike the other sites, sufficient
width is available at Site 4 to include a floodplain bench along the river bank. The stabilization approach
could include the construction of a wood toe revetment along the edge of the water. Above this
revetment, a floodplain bench of up to 30 feet in width could be graded at the appropriate (i.e.,
bankfull) elevation. The bank could then be graded to a stable (3:1 or flatter) slope between the bench
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
7

and existing ground at the top of bank, then lined with biodegradable erosion control matting. The trail
could remain in its existing location. A riparian buffer of native trees, shrubs, and grasses should be
planted along the rebuilt river bank.
Site 5 (170 feet): Like Site 1, the river bank at Site 5 has eroded to the extent that it could be rebuilt to
protrude approximately 10 feet further into the river. This additional width for the river bank would
allow the trail to remain in its existing location and provide additional protection for the fishing pier
within this reach. At the toe of the bank, stacked boulders could be used to armor the bank for
approximately 3 vertical feet above and below the water line. Above the boulder toe, the bank should
be graded to a stable (3:1 or flatter) slope and lined with biodegradable erosion control matting. A
riparian buffer of native trees, shrubs, and grasses should be planted along the rebuilt river bank.
Site 6 (380 feet): At the toe of the existing river bank, stacked boulders could be used to armor the bank
for approximately 3 vertical feet above and below the water line. Above the boulder toe, the bank
should be graded to a stable (3:1 or flatter) slope and lined with biodegradable erosion control matting.
Due to the proximity between the existing trail and eroding bank, approximately 500 feet of the trail
would need to be re -aligned at least 30-40 feet away from the river. A riparian buffer of native trees,
shrubs, and grasses should be planted along the river bank.
Site 7 (20 feet): Site 7 represents a minor area of bank erosion, as compared to the other sites. This area
of erosion could be repaired with minor grading, installation of biodegradable erosion control matting,
and planting of a riparian buffer of native trees, shrubs, and grasses. Alternately, this area could be
repaired using stacked boulders in a way that could also provide a hardened public access point to the
river. The trail could remain in its existing location.
Non -specified preps (approximately4,800 feet): While these areas did not contain significant river bank
erosion, there are still actions that can be taken to promote a healthy riparian buffer and reduce the
likelihood of future erosion. As needed, the riparian vegetation in these areas should be enhanced
through additional planting of native trees, shrubs, and grasses, as well as removal of any
invasive/exotic species. Additionally, the riparian buffer should be allowed to be as wide as possible,
given the constraints of the trail location.
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
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4. Cost Estimates, Funding Opportunities, and Permitting
Cost Estimates
Following are estimated ranges of costs for project implementation, including design, permitting,
construction, and planting to achieve river bank stabilization and ecological enhancement objectives:
Site 1 (Moderate priority): $35,000 to $60,000
Site 2 (Moderate priority): $15,000 to $35,000
Site 3 (High priority): $20,000 to $40,000
Site 4 (High priority): $30,000 to $55,000
Site 5 (Moderate priority): $25,000 to $45,000
Site 6 (High priority): $45,000 to $90,000
Site 7 (Low priority): $1,000 to $3,000
Cost estimates are based on typical fees for recent projects in western North Carolina. These are broad
ranges of costs to be used only for general planning purposes. Cost savings can be incurred by grouping
projects together or utilizing City forces and volunteers.
Funding Opportunities
Potential funding sources for river restoration in North Carolina include the following grant programs, all
of which require local matching funds:
NC DEQ Water Resources Development Grant Program
https://deq.nc.gov/about/divisions/water-resources/water-resources-grants/financial-assistance
North Carolina Land and Water Fund
https://nclwf.nc.gov/
NC Department of Agriculture and Consumer Services Community Conservation Assistance Program
(CCAP)
http://www.ncagr.gov/SWC/costshareprograms/CCAP/index.html
Other grants available for watershed restoration are described on the NC DEQ web site:
https://deq.nc.gov/about/divisions/water-resources/planning/basin-planning/use-restoration-
watershed-programs/funding
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
9

Permitting
River restoration and stabilization projects require permitting at the federal, state, and local levels for
environmental and floodplain impacts. Environmental permitting is coordinated by the NC Division of
Water Resources and US Army Corps of Engineers using the web -based Pre -Construction Notification
(PCN) Form for Nationwide Permits along with corresponding Water Quality Certifications:
https://edocs.deq.nc.gov/Forms/Pre-Construction Notification Form
Once the application is complete, the Corps will process it within 45 days for a Nationwide or General
Permit, and the NC DWR will process the 401 Certification within 60 days. Other permit approvals may
be required by NC Wildlife Resources Commission, US Fish & Wildlife Service, and the State Historic
Preservation Office.
If a Floodplain Development Permit is required, the restoration /stabilization project may require
coordination with NC Department of Public Safety Floodplain Management Branch to obtain a "No -Rise"
Certification or a Letter of Map Revision (LOMR). Project managers should work closely with permitting
agencies to determine specific requirements for implementation.
APPENDIX:
Sheet 1: Location Map
Sheet 2: Aerial Photography and Site Locations
Sheet 3: Site 1 Conceptual Designs
Sheet 4: Site 2 Conceptual Designs
Sheet 5: Site 3 Conceptual Designs
Sheet 6: Site 4 Conceptual Designs
Sheet 7: Site 5 Conceptual Designs
Sheet 8: Site 6 Conceptual Designs
Sheet 9: Site 7 Conceptual Designs
Sheet 10: Boulder Toe Protection Typical Details
Sheet 11: Toe Wood Typical Details
Sheet 12: Erosion Control Matting Typical Details
Sheet 13: Vegetation Typical Details
Catawba River Bank Stabilization Plan Jennings Environmental PLLC
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Upstream Extent
of Study Area
Jennings
Environmental
Location Map
0 200 400 800 1,200 1,600
Feet
Downstream Extent
of Study Area
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
1
Catawba River Bank Stabilization Plan
11
Jennings Environmental PLLC

Jennings
Environmental
Aerial Photography and Site Locations
0 200 400 800 1,200 1,600
Feet
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
2
Catawba River Bank Stabilization Plan
12
Jennings Environmental PLLC

Site 1
98
97
96
95
— _
_
9/
/
93
92
/
91
/
/
/
90
89
/
—Existing
ee
— —Conceptual Design
98
85
-10 -5 0 5 10 15 20 25
ott
On streambanks throughout the reach, plant
a native riparian buffer of trees and shrubs
Rebuild strearnba nk by constructing stacked boulder toe
(at 1:1 slope) approximately 10 feet beyond the water line;
then fill and grade to top of bank at 3:1 slope
Remove existing berm
along top of streambank
Leave trail in existing location
Upstream Extent
Downstream Extent
(220 linear feet)
•
Jennings
Environmental
Site 1 Conceptual Design
0 25 50 100 150
200
Peet
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
3
Catawba River Bank Stabilization Plan
13
Jennings Environmental PLLC

Site 1
96
97
96
95
94
��
93
92
i
91
e
90
58
r
1---ixisiing
.-�
87
i
— -Conceptual Dergn
/
56
35
-10 -5 0 5 10 15 20 25
Jennings
Environmental
On streambanks throughout the reach, plant
a native riparian buffer of trees and shrubs
Rebuild streambank by constructing stacked boulder toe
Cat 1:1 slope) approximately 10 feet beyond the water line;
then fill and grade to top of bank at 3:1 slope
Remove existing berm
along top of streambank
Leave trail in existing location
Site 1 Conceptual Design
9 25 50 100 150
200
Feet
Downstream Etitent
(220 4uear leer.)
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
3
Catawba River Bank Stabilization Plan
14
Jennings Environmental PLLC

Site 2
95
94
83
i
92
'
91
e
89
44
91
—busting
-
— -Conceptual DePP•86
es
84
0 5 10 15 20 25 3C
On stxe:unbaoks throughout the reach, plant
a native rip ari:m hnffer of rrePS and shruhc
Rebuild strearnhank by constructing stacked
boulder toe (at 1:1 slope) at the water line;
then grade to existing ground at 3:1 slope
Upstream Extent
• +a
Dora :mined en Extent
100 linear feet}
Leave trail and fence
in existing locations
Jennings
Environmental
Site 2 Conceptual Design
0 25 50 100 150 200
Feet
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
4
Catawba River Bank Stabilization Plan
15
Jennings Environmental PLLC

Jennings
Environmental
On streambanks throughout the reach, plant
a native riparian buffer of trees and shrubs
Rebuild streambank by constructing stacked
boulder toe (at 1:1 slope) at the water line;
then grade to existing ground at 3:1 slope
Realign approximately 300 feet of the trail
at least 16-20 feet away from srreanibank
Site 3 Conceptual Design
0 25 50 100 150
200
Feet
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
5
Catawba River Bank Stabilization Plan
16
Jennings Environmental PLLC

Site 4
95
■■MMM
■■■■■■
94
■'
—Existing
'
Fa
3
■■
niCancePtual Desifln
■
/II.
9
■■■■■■■■■
IE
91
MOM
■■■■CIE
■■
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89
NI
It
mu,
mar Allia5
VA
■■■■■■►■85
■■■
84
0 5 10 15 20 25 30 35 40 45 50 55
Jennings
Environmental
On streambanks throughout the reach, plant
a Native riparian bntfel of trees and shrubs
Rebuild streambank by constructing wood toe revetment
at the water line; backfill to create bankhall bench up to 30
feet wide; grade from bench to existing ground at 3:1 slope
t"psireani Extent
Leave trail in
existing location
4
llonvt:stcearn Extent
�?.{0 Ltic,:r feel)
Site 4 Conceptual Design
o _ 50 100 150
zoo
Feet
.fit,.!poor .-,
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
6
Catawba River Bank Stabilization Plan
17
Jennings Environmental PLLC

Site 5
■■■I
IMEMEM
sa
33
■■■Ifi■■■■
32
■■■■■■■Ell
■■31.■■■■■
91
■ISi11■■■■■■
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88
Fa
36
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•
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—Existing
25
-IC 5 10 13 20 25 30 35
Upstream Extent
Existing fishing pier
Leave trail in existing location
On streambanks throughout the reach, plant
a native riparian buffer of trees and shrubs
Rebuild streauubank by constructing stacked boulder toe
(at 1;1 slope) approximately 10 feet beyond the water line;
then fill and grade to top of bank at 3:1 slope
l Downstream Extent
(170 linear feet)
•. N... i.-
AN. • •-
•
e
-41r
nrrtr
.
Jennings
Environmental
Site 5 Conceptual Design
0 25 50
100
l50
200
Feet
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
7
Catawba River Bank Stabilization Plan
18
Jennings Environmental PLLC

96
35
83
92
91
90
53
47
4g
99
54
43
82
Site 6
r
[misting
.Conceptual Design
5 10 15 20 25 30
is =�
;4 SI. �.�1s'1tiS1,
On streandaanks throughout the reach, plant
a native riparian buffer of trees and shrubs
Rebuild streambank by constructing stacked
boulder toe (at hi slope) at the water line;
then grade to existing ground at 3:1 slope
Realign approxunately 500 feet of the trail
at least 30-40 feet away from streambank
41-424,7454040.
Jennings
Environmental
Site 6 Conceptual Design
0 25 50 100 150
200
Fect
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
8
Catawba River Bank Stabilization Plan
19
Jennings Environmental PLLC

Jennings
Environmental
On streatnbanks throughout the reach, plant
a native riparian buffer of trees and shrubs
Stabilize streambank in place using boulders,
possibly stacked to allow for river access
Downstrea[n Extent
(20 linear feet)
Site 7 Conceptual Design
0 25 50 100 150
200
Feet
Catawba River Bank Stabilization
Conceptual Planning
Marion, North Carolina
Sheet
9
Catawba River Bank Stabilization Plan
20
Jennings Environmental PLLC

SOIL GEOLI1TS TO
BANKFULL STAGE
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4001410010111.11111001,
` LIVE CUTTINGS INSTALLED
BETWEEN UFTS 20' o.0
D(CAVATI N LIMITS---_�
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COMPACTED CARTE
BACKFILL
FINER GRAVEL AND- {
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OR NC DOT CLASS 1 -
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ALTER FABRIC
BOUT DFRS
BOULDER TOE
PRO! EL. IIL/ N
7.
DETAILED PLAN
NOT TO SCALE
BOULDER TOE NOTES
1_ ALL 6OULDFRS SHALL BE STRUCTURAL STONE, CUBICAL OR RECTANGULAR IN SHAPE BOULDERS AVAILABLE
ONS10E MAY BE USW IF APPROVED BY THE ENGINEER. BOULDERS SHALL BE 3.0' X 5.0' X 25' IOU X L X FB -H5. 0.5'.
THE NYNIMUM ACCEPTABLE BOULDER 11-LCKNESS 1M 15 2_0'- BOULDERS LONGER (LI THAN 55' WILL BE
ACCEPTED,
2. A BEDDING COURSE CONSISUTIG OF 70% NCOOT 51 Ass 6 AND 3V0 NWOT CLASS A SHALL BE INSTALLED
BELOW THE FIRST ROW OF BOULDER'' IF BEDROCK IS ENCOUNTERED ON511E, THE FIRST LIFT OF BOULDERS
SHALL BE PLACED DIRECTLY ON THE BEDROCK_ ALL BOULDER'. SHALL FIT TIGHTLY TOGETHER. INSTALL EACH
LIFT OF BOULOEFS WITH A 0.5' SETBACK FROM THE FRONT FUDGE OF THE 0*0(0 5 UFTOF BOULDERS.
3. UNCONSOLIDATED GRAVEL AND TOPSOIL SHALL BE INSTALLED AS A IEVEUNG COURSE THE ABOVE BOULDERS
BEFORE THE LIVE CUTTINGS ANC SOLE LIFTS 400INSTALLED_
4. PLACE LAYER OF LIVE CUTTINGS (MIN- 4' LENGTH) A 20. 0G ON THE GRAVEL AND TOPSOIL SUCH THAT
APPROXIMATELY 6INCHES TO I FOOT OF EACH LIVE BRANCH WILL BE EIEOSED AND THE REMAINDER Ix TO 4)
OF EACH LIVE BRANCH YN LL BE COVERED BY THE SOIL LIFT. LNE BRANCHES SHALL BE OF THE SPECIES SPECIFIED
FOR NHE STAKES OR APPROVED BYTHE ENGINEER.
5. INSTALL SOIL UETS FROM THE LIVE CUTTINGS UP TO Tif BANKFULL STAGE. UETS SHALL NOT EXCEED 1,0'
THICKNESS. UFTS SHALL INCLUDE ALL SOL PREPARATION, TEMPORARY AND PERMANENT SEEDING AND MULCH.
SOIL LIFTS SHALL USE 2 LAYERS OF MATTING: 260Z. / YD' COIL MATTING (OUTER) AND 11.2 OZ/YER COCONUT
FIBER BLANKET (INNER). EROSION CONTROL MATTING USED FOR SOIL LIFTS SHALL BE MADE OF 101% NATURAL
FIBERS AND MATERIALS AND BE BIODEGRADABLE UNDER NORMAL CUMA.TE CONDITIONS EROSION CONTROL
MATTING CONTAINING PLASTICS OR PLASTIC BASED MATERIALS SHALL NOT BE U50
6. PLACE SOIL BACKRLL UP TO 11-E UFT HEIGHT SPEGRED OF NO GREATER THAN 1.0 FT BEING CAREFUL NOT TO
PONT BARON INSIDE BEND PUSH/PULL OR TEAR THE FABRIC PREVIOI BLY PLACED_
BNNKRULL
NVESTAKIE.S AND BARE ROOT PLANTINGS
INSTALL SOIL UFTS UP TO BANKFULL
STAGE ay.. 1p16S'
SOIL LIFTS SHALL USE 2 LAYERS OF
MATTING_ 2602/YD' CCU MATTING
(OUTER) AND 11.2 O2Y31 COCONUT
FIBER BLANKET (INNER.
LNE CUTTINGS BETWEEN LIFTS
UNCON5C%1DATED GRAVEL AND TOPSOIL
TOP OF BOULDERS ELV - 1,033.5'
DETAILED SECTION A - A
NOT TO SCALE
7_ REPEAT STETS 04, Y5 AND Y6 AS NEEDED TO INSTALL SOIL LIFTS UP TO THE BANKF ULL STAGE
B. THE SU00ACE OF THIS STRUCTURE SHALL BE FIMSFED TO A SMOOTH AND COMPACT SURFACE IN
ACCORDANCE WIN THE LINES. GRADES. AND CB056SECTEON5 OR ELEVATIONS SHOWN ON THE DRAWINGS.
THE DEGREE OF FINISH FOR ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AMU ELEVATIONS INDICATED
OR APPROVE? BY THE ENGINEER.
9.
REDRESSING OF CHANNEL AND BAER:FULL BENC500100014154 WILL UKELY BE REQUIRED FOLLOWING
INSTALLATION OF IN -STREAM STRUCTURES APT SHAM BE CONSIDERED INCIDENTAL TO CONSTIUCNON_
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CATAWBA RIVER BANK STABILIZATION PLAN
DETAIL: BOULDER TOE PROTECTION
PRELIMINARY
DRAWING
ME 1 MOWN
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Catawba River Bank Stabilization Plan
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Jennings Environmental PLLC

SOIL GEOLIFTS TO
BANKROLL STAGE
f
1
EXCAVATION LIMn1 . _
WOOD STATE
2-X2'X1W-36' -
COMPACTED MITE 1
BAO(FILL • •
WOODY MATDBAL
INSTALLED N 1.0'
LIFTS ABOVE LOGS
4
DETAILED PLAN
NOT TO SCALE
LNECUTTNGI INSTALLED
BETWEEN LIFTS 20' 0.0
POINT BARON INSIDE BEND
RANKFULL
USIE STAKES AND BARE ROOT FIANTINGS
INSTALL SOIL UR'S UP TO BANKROLL
STAGE ELV = 1,036.0
SOR LIFTS SHALL USE 2 LAYEIS OF
MATTING: 260Z ! LLD' COR MATTING
IA I.u, ()UTERI) AND 112ODYD' COCONUT
METER BLANKET 0NKER)_
�1 uVECUTTINGS BETWEEN LIFTS
UNCONSOLIDATED GRAVEL AND TOPSOIL
DETAILED SECTION A - A
NOT TO SCALE
TOP OF TOE WOOD
ELV - 1,0315'
APPROXIMATE LOW FLOW WSE
LOGS WITH ROOTWADS IN1TALUXD AT
BASE OF WOODY DEBRIS
BASE OF TOE WDOD
APPROX. ELV = 1 0280' - 1,0290'
TOE WOOD NOTES
1 WOODY MATRON USED IN THE TOE WOOD STRUCTURE SHALL CONSIST OF LOGS, LARGE BRANCHES AND
WOOLY DEBRIS RANGING IN DIAMETER FROM 1 • TO 12'_ LARGE VOIDS SHALL BE RUED VHTH FINE \VDDDY
MATERIAL AND DEERS. ALL MATERIALS ARE TO BE APPROVED BY TFE ENGINEER A LAYER OF LOGS WRH ROOD
WADS INTACT STALL BE INSTALLED ALONG THE BASE OF THE STRUCTURE WOODY MATERIAL SHALL BE
INSTALLED IN 1.0' LIFTS. EACH LIFT SHALL BE COMPACTED WITH THE EXCAVATOR BUCKET AND COVERED WTH
A LAYER OF A1.LSJ'ALM OR MIXED SOIL AND GRAVEL TO FORM A DENSE LAYER OF WOODY MATERIAL AND
ALLUVIAL TO LINES, ELEVATIONS AND GRADES N THE DRAWINGS,
2, UNCGNSOUDATED GRAVEL AND TOPSOIL SHALL BE INSTALLED ABOVE WOODY MATERWL BEFORE THE NNE
CUTTINGS AND SOIL LIFTS ARE INSTALLED_
3_ PUKE LAYER OF LIVE CUTTINGS (MAN_ 4' LENGTH) A 2 U 0 C ON THE GRAVEL AND TOPSOIL SUCH THAT
APPROXIMATELY 6 INCHES TO I FOOT OF EACH LIVE BRAN51.1 WILL RE EXPOSED AND THE REMAINDER (2' TO 45
OF EACH LINE BRANCH WILL BE COVERED BY THE SOIL LIFT LIVE BRANCHES SHALL BE OF THE SPECIES SPECIFIED
FOR LNE STAKES OR APPROVID BY ILE ENGINEER.
4 INSTALL SOIL LIFTS FROM THE LIVE CUTTINGS UP TO THE BANK/FULL STAGE LIFTS SHALL NOT EXCEED 1 0'
THICKNESS. LIFTS SHALL INCLUDE ALL 5OL PREPARATION, TEMPORARY AND PERMANENT SEEDING AND MULCH
SOIL LIFTS SHALL USE 2 LAYERS OF MATTING- 2607_ / VD' COIR MATTING (OUTER) AND 11.2 07MD' COCONUT
FIBER BLANKET ANNER). EROSION CONTROL MATTING u5ED FOR SOIL UFEB SNAIL BE MADE OF 100% NATURAL
FIBERS AND MATERIALS AND BE BIODEGRADABLE UNDER NORMAL CLIMATE CONDTIONS EROSION CONTROL
MATTING CONTAINING PLASTICS OR PLASTIC BASED MATFAAL55HALL NOT BE USED.
5. PLACE SOIL BACKFILL UP TO THE LIFT HEIGHT SPECIFIED OF NO GREATER THAN 1.0 FT BEING CAREFIJL NOT TO
PUSH/PULL OR TEAR THE FABRIC PREVIOUSLY RACED.
6. REPEAT STEI5R3,e4 AND 45 AS NEEDED TO INSTALL SOIL LIFTS UP TO THE SANIKEUU. STAGE.
7, THE SURFACE OF THIS STRUCTURE SHALL RE FINISHED TO A SMOOTH AND COMPACT SURFACE IN
ACCORDANCE WFIH TEE LANES, GRADES, AND CROSS -SECTIONS OR ELEVATIONS SHOWN ON THE DRAWINGS_
THE DEGREE OF FINISH FOR ELEVATIONS SHALL BE WITHIN 0.1 FT OF THE GRADES AND ELEVATIONS INDICATED
OR APPROVED SY THE ENGINEER.
8, RE -DRESSING OE CHANNEL AND BANKFULL BENCHYFLOODPLAIN WILL LIKELY BE REQUIRED FOLLOWING
INSTALLATION OF IN -STREAM STRUCTURE' AND SHALL BE CONSIDERED INGDENTALTO CONSTRUCTION.
CATAWBA RIVER BANK STABILIZATION PLAN
DETAIL TOE WOOD PROTECTION
PRELIMINARY
DRAWING
NIS
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Catawba River Bank Stabilization Plan
22
Jennings Environmental PLLC

4' MIN. HORIZONTAL —
OVERLAP
BANKFULL
TOE OF SLOPE 10001
I;74 :r110f
EROSION CONTROL MATTING FROM TOE OF CHANNEL TO
3.0' BEYOND BANKFULL STAGE
DETAILED PLAN
NOT TO SCALE
VERTICAL OVERLAP
MIN, 12' WITH DOUBLE
ECO-STAKES
2'
11
B
1
■ B B 1
■
EDGE OVERLAP
MIN. 4' WITH DOUBLE
ECO-STAKES AT 2' QC.
■= EROSION CONTROL
MATTING
k
•
DETAILED STAKING PLAN
BANKFULL STAGE
SINGLE 12' ECO-STAKES
OFFSET ROWS AT
2'-3'OC.
EROSION CONTROL MATTING NOTES
1_ EROSION CONTROL MATTING IS UY-D TO PROTECT RECENTLY CONSTRUCTTD STREAMBANKS FROM EROSION
THE MATTING WILL REMAN INTACT WHILE TFE BANK AND RIPARIAN VEGETATION MATURES. PROPIDING
CRITICAL BANK PROTECTION_
2. BEFORE INSTALLING EROSION CONTROL MATTING, RAKE SOIL LEVEL, ADD TEMPORARY AND PERMANENT SEED,
SOIL PREPARATION AND MULCH
3, EROSION CONTROL MATTING SHALL BE PLACED ALONG THE LENGTH OF TEE NEW CHANNEL FROM TFE TOE OF
SLOPE OJT TO A MINIMUM OF 4.5' BEYOND THE BANKFULL STAGE.
4. SECURE MATTING IN PLACE BY STAKING AND OVERLAPPING AT THE SEEMS WITH A SHINGLE -TYPE METHOD
SUCH THAT THE OVERLAPPING PIECE IS IN TIE SAME DIRECTION AND AS THE STREAM FLOW AS SHOWN IN THE
DETAIL ADDITIONAL STAKING SHALL BE APPLIED BY THE CONTRACTOR AT NO ALUTTIONAL COST IF THE
MATTING SEPARATES FROM THE SOIL MORE THAN ONE INCH UNDER A REASONABLE PULL
5. EROSION CONTROL MATTING SHALL BE MADE OF 1CO% NATURAL FIBERS AND MATERIALS AND BE
BIODEGRADABLE UNDER NORMAL CL MATE CONDITIONS . EROSION CONTROL MATTING CONTAINING PLASTICS
OR PLASTIC BASED MATERIALS SNAIL NOT BE US®.
EROSION CONTROL
MATTING
4.5'
BANKFULL
III
`SECURE MATTING WITH
ECO-STAKE 4' OVERLAP AND
MIN 12' LENGTH DOUBLED ECO-STAKES
BURY 6' BELOW
STREAMBED
DETAILED SECTION A - A'
NOT TO SCALE NOT TO SCALE
CATAWBA RIVER BANK STABIUZATION PLAN
DETAIL: EROSION CONTROL MATTING
PRELIMINARY
DRAWING
11.1.17,12/09.171.
Mr, MIMI
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Catawba River Bank Stabilization Plan
23
Jennings Environmental PLLC

SPAONG PER
PlANUNG PLAN
0
INSERT THE DIBBLE
STRAIGHT D0VN INFO
THE SOIL TO TFE FULL
DEPTH OF THE BLADE
AND PULL BACK ON THE
HANDLE TO OPENT THE
PLANTING HOLE. DO
NOT ROCK THE SHOVEL
BACK ASO FORTH AS
THIS CAUSES THE SOIL
IN THE RANTING HOLE
TO BE COMPACTED,
INHIBFIING ROOT
GROWTH.
BANKFULL
TOE OF SLOPE
BARE ROOT SEEDLING
BANKFULL LJ VE STAKE
JUNCUS PLUG
BARE ROOT PLANTINGS
3.0' FROM BANK( ULL
REMOVE THE DIBBLE INSERT THE CREOLE
AND PUSH THE SEVERAL INCHES IN
SEEDLING ROOTS DEEP FRONT OF THE
INTO TEE PLANTING SEEDLING AND PUSH
HOLE PULL THE THE BLADE HALFWAY
SFFOIING BACK UP TO INTO THE SOIL TWIST
THE CORRECT AND PUSH THE HANDLE
PUNTING DEPTH_ THE FORWARD TO CLOSE
ROOT COLLAR SHOULD THE TOP OF THE
BE 1' - 3' BELOW THE PLANTING HOLE TO
SOIL SURFACE GENTLY HOLD THE SEEDLING IN
SHAKE THE SEEDLING PLACE
TO ALLOW THE ROOTS
TO STRAIGHTEN OUT
DO NOT TWIST OR SPIV
DE SEEDLING OR
LEAVE THE ROOTS
J-ROOTED_
DIBBLE BAR
PLANTING BAR SHALL HAVE A
BLADE WITH A TRIANGULAR
CROSS-SECTION, AND SHALL
BE 12' LONG, 4' WIDE AM) I'
11-INK AT THE GENTS_
ROOT PRIMING
ALL ROOTS SHALL BE PRUNED
TO AN APPROPRIATE LENGTH
FOR PLANTING TO PREVENT
.4ROOTIING.
PUSH THE DIBBLE
0DWN TO THE FILL
DEPTHOF THE BLADE.
BARE ROOT DETAILS
3' O.C. LIVE STAKE AND PLUG SPACING / 3' ROW SPACING
0
NOTES
1_ ALL SOILS WITHIN THE
BUFFER PLANTING AREA
SHALL BE DISKED, AS
REQUIRED, PRIOR TO
PLANTING.
2_ ALL RANTS SHALL BE
HANDLED PROPERLY PRIOR
TO INSTALLATION TO
ENSURE SURVIVAL Alp
PULLBACK ON THE
HANDLE TO CLOSE THE
BOTTOM OF THE
PLANTING HOLE THEN
PUSH FORWARD TO
CLOSE THE TOP
EDMNATING AIR
POCKETS AROUND THE
ROOT.
PLANT LIVE STAKES AND PLUGS IN RRT15 FROM
TOE OF SLOPE TO 3' BEYOND THE BAMESILLSTAGE
0
REMOVE ME DIBBLE_
CLILBP AND HRM UP
TFE OPENING WITH
YOIAF HFEL RE
CARERL TO AVOID
DAMAGING THE
SEEDING.
LIVE STAKES AND BAREROOT
PLANTINGS IN OFFSET
ROWS PER PLANTING PLAN
NOTES
CONTAINER WIDTH
NOTES
1. PLANTS SHALL HAVE BEEN GROWN IN A CONTAINER LONG ENOUGH FOR
THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL
TOGETHER ONCE REMOVED FROM THE CONTAINER.
2. RANTS WILL NEED TO BE WATERED REGULARLY AND PLACED IN SHADY
CONDITIONS UNTIL PLANTING OCCURS
3 THE DIAMETER OF THE PLANTING PITS FOR EACH PLANT S!-OND BE AT
LEAST TWO TIMES THE DIAMETER OF THE ROOT MASS SCARIFY THE
PLANTING PR PRIOR TO EACH PLANT INSTALLATION_
4. SET PLANTS UPRIGHT IN THE CENTER OF THE PT THE BOTTOM OF THE
ROOT MASS SHOULD BE RESTING ON UNDISTURBED SOIL
5. PLACE BACKHLL AROUND LASE AND SIDES OF ROOT MASS, AND WORK
FpGI LAYER TO SETTLE BACXHLL AND TO RUMINATE VOIDS AND AIR
POCKETS_ WHEN PIT 5 APPROXIMATELY FULL, WATER THOROUGHLY
BEFORE PLACING REMAINDER OF THE BAC-KELL WATER AGAIN AFTER
PLACING FINAL LAYER OF B4CKHLL
SECTION A - A'
CONTAINER PLANT DETAILS
1 30 2DIAMR
2'TO BLNESTAKE
TAPERED AT BOTTOM
LNE STAKE
1. WE STAKE MUST BE DORMANT WHEN CUT. KEEP LIVE STaSES MOIST UNTIL RANTING. THE STAKE SHOULD BE
PREPARED WTH THE BIAS POINTED UP, AND THE BOTTOM SHOULD BE CUT AT AN ANGLE FOR INSERTION INTO THE
GROUND. AN IRON BAR CAN BE USED TO MAKE A PLOT HOLE TO PREVENT BARK FROM BEING DAMAGED DURING
INSTALLATION.
2 LIVE STAKES SHALL BE 0.5'- 2` IN DIAMETER AND 2'-3' IN LENGTH.
3, IJVE STAKES SHOULD BE PLACED WITH TO OF E-E LENGTH OF TEE STAKE BELOW GROUND AND ANGLED
DOWNSTREAM ENSURE THE BASE OF THE LNE STAKE WILL REACH TFE WATER TABLE AFTER INSTALLATION THE TOP
OF TFE LIVE STAKE SHALL BE PRUNED VHTH A SQUARE OJT LEASING NO LESS THAN 3' AND NO LESS THAN 6' ABOVE
THE GROUND.
4. PLANTUVE STAKES AND JUNCUS PLUGS IN OFFSET ROWS AND SPACINGS PER RANTING PLAN,
LIVE STAKING DETAILS
�¢8
CATAWBA RIVER BANK STABILIZATION PLAN
VEGETATION DETAILS
PRELIMINARY
DRAWING
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Catawba River Bank Stabilization Plan
24
Jennings Environmental PLLC