20001195 Ver 1_CDIA_Coffey Creek Restoration Planting Plan_SCFT_20221122_final_20221129

Baker, Caroline D
From: Jordan, Jimmy <[e-mail]>
Sent: Tuesday, November 29, 2022 9:27 AM
To: Perez, Douglas J
Cc: Settevendemio, Erin
Subject: FW: [EXT]RE: [EXT]RE: [EXT]Coffey Creek buffer restoration planting plan
Attachments: CDIA_Coffey Creek Restoration Planting Plan_SCFT_20221122_final.pdf
Good morning Doug;
The below information and attached plan is for your consideration. Its purpose is to restore the damages done by the
CLT Airport Project out at Coffey Creek, south of Byrum Drive. Please review and know that I am handing this off to our
CLT contractors and Project Managers immediately to get things rolling. Call or message me or Erin with any grave or
deal -breaking concerns you may have.
JIMMY D. JORDAN, P.G. I ENVIRONMENTAL MANAGER
CHARLOTTE DOUGLAS INTERNATIONAL AIRPORT
980-288-3793
cltairport.com
From: Jordan, Jimmy
Sent: Wednesday, November 23, 2022 9:30 PM
To: Thames, Kelly <[e-mail]>; Settevendemio, Erin <[e-mail]>
Cc: Rysdon, Eric <[e-mail]>; Smith, Cody <[e-mail]>; Fairchild, Ryan
<[e-mail]>; Watson, Ashton <[e-mail]>
Subject: RE: [EXT]RE: [EXT]RE: [EXT]Coffey Creek buffer restoration planting plan
Thank you for your input and for this information about Doug. I will share the plan of restoration with our project
managers out here so that they and Thalle can consider a local reputable contractor to begin the field work.
Cody, and Ryan; the time has come for the additional restoration to be done for the buffer loss to the SCFT project that
occurred in early October. I will soon forward you the restoration plan that DWQ wants to see enacted. It will basically
involve matting, seeding, and planting of replacement shrubbery, saplings, live stakes, etc. I will be in touch
Monday. Have a good Holiday weekend.
J. D. Jordan
JIMMY D. JORDAN, P.G. I ENVIRONMENTAL MANAGER
CHARLOTTE DOUGLAS INTERNATIONAL AIRPORT
980-288-3793
cltairport.com

From: Thames, Kelly <[e-mail]>
Sent: Wednesday, November 23, 2022 6:39 AM
To: Settevendemio, Erin <[e-mail]>; Jordan, Jimmy <[e-mail]>
Cc: Rysdon, Eric <[e-mail]>
Subject: [EXT]RE: [EXT]RE: [EXT]Coffey Creek buffer restoration planting plan
EXTERNAL EMAIL: This email originated from the Internet. Do not click any images, links or open any attachments unless you recognize and trust the sender and
know the content is safe. Please click the Phish Alert button to forward the email to Bad.Mail.
FYI — Doug Perez is leaving DWR (if he hasn't already) to work for the USACE in the Charlotte Field Office. Alan Johnson is
coming back to DWR part time for a bit to bridge the gap until they can hire to replace.
Thanks and Happy Thanksgiving!
Kelly
Kelly Thames, Pws, TN-QHP
Sr. Environmental Project Manager, Associate
Southeast Environmental Sciences & Planning Lead
D 704.338.6710 M 704.996.9986
hdrinc.com/follow-us

FY2
Coffey Creek Restoration
Planting Plan
Charlotte Douglas International Airport
South Crossfield Taxiway (SCFT) In -line
Detention Basin
Charlotte, North Carolina
November 22, 2022

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
Contents
1 Project Background 1
2 Restoration Design 3
2.1 Restoration Approach 3
2.2 Restoration Specifications 3
2.2.1 Streambank Grading 3
2.2.2 Coir Fiber Stabilization 4
2.2.3 Revegetation 5
3 Post -Restoration Assessments 10
4 Reporting and Maintenance 10
5 References 11
Tables
Table 2-1. Estimated Area of Planting Zones 6
Table 2-2. Potential Native Tree and Shrub Species for Planting by Zone 7
Table 2-3. Estimated Quantity of Shrubs and Trees Recommended for Vegetated Buffer
Restoration 9
Table 2-4. Permanent Riparian Seed Mix* 9
Table 2-5. Temporary Cover Seed Mix 9
Table 3-1. Post -Restoration Visual Assessments 10
Figures
Figure 1-1. South Crossfield Taxiway Stormwater Detention Basin and Buffer Restoration Area 2
Figure 2-1. Grade and stabilization of banks (if applicable) 4
Figure 2-2. Coconut Coir Fiber Matting Installation Details 5
Figure 2-3. Proposed Planting Zones 6
November 22, 2022 1 i

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
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ii (November 22, 2022

Coffey Creek Restoration Planting Plan EN
Charlotte Douglas International Airport
1 Project Background
The City of Charlotte — Aviation Department submitted a Phased Clean Water Act (CWA) Section
404/401 Individual Permit (IP) on January 31, 2020, for the proposed expansion of the Charlotte
Douglas International Airport (CLT or Airport) in Mecklenburg County, North Carolina. The CWA
Section 401 Individual Water Quality Certification was approved by the North Carolina Division of
Water Resources (NCDWR, a division of the N.C. Department of Environmental Quality [NCDENR])
on August 21, 2020 and the CWA Section 404 IP was approved by the U.S. Army Corps of
Engineers (USACE) on December 15, 2020. A component of the approved Phased IP includes the
construction of the South Crossfield Taxiway (SCFT) stormwater detention basin (Project) located in -
line with Coffey Creek. A portion of Coffey Creek falls within the stormwater detention basin limits for
the SCFT Project (Figure 1-1). In consultation with the City of Charlotte during the permitting
process, the Airport committed to maintaining a 10-foot vegetated buffer from top of bank on each
side of Coffey Creek.
During a site visit on September 20, 2022, the vegetated buffer along approximately 400 linear feet
of Coffey Creek on the right bank (looking downstream) was observed to have been disturbed or
removed due to blasting associated with construction activities. Trees and other vegetation in the
riparian buffer were damaged, uprooted, or buried in sediment and boulders. Vegetated buffer areas
on the left bank of Coffey Creek were intact.
Immediate remedial actions by the Airport included reinstallation of silt fencing and hydroseeding of
exposed streambank and buffer areas. The NCDENR, U.S. Army Corps of Engineers, and City of
Charlotte were notified of the site conditions on September 26, 2022. During a site visit on October
4, 2022, Doug Perez (NCDWR), provided additional recommendations for restoration of the buffer
area. This restoration planting plan provides details for streambank and buffer stabilization in the
disturbed area with consideration of recommendations provided by the NCDWR.
November 22, 2022 11

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
LEGEND
Streams
SOFT Basin Grading Limits
Coffey Creek Buffer Restoration Area
Open Water
SCFT Basin Flood Limits
0 Feet 200
Charlotte
Douglas
International
Airport
Individual
Permit Limits
Figure 1-1. South Crossfield Taxiway Stormwater Detention Basin and Buffer Restoration Area
2 INovember 22, 2022

Coffey Creek Restoration Planting Plan EN
Charlotte Douglas International Airport
2 Restoration Design
2.1 Restoration Approach
The Airport proposes to restore approximately 500 linear feet of streambank and riparian buffer area
along the right bank of Coffey Creek. The Rosgen Priority 4 stream restoration approach will be
applied based on the type and degree of disturbance and restoration needs as defined in
consultation with NCDWR. The purpose of Rosgen Priority 4 stream restoration is to stabilize Coffey
Creek streambanks and buffer in place using bioengineering techniques.
Coffey Creek in the vicinity of the restoration activities is a Rosgen F4 stream type based on pre -
construction geomorphic surveys completed (site S25-2) in April, 2021. It is a gravel -dominated,
entrenched and deeply incised channel. The right top of bank at this location is approximately 7.71
feet above the elevation of the stream thalweg, and 4.74 feet above the bankfull elevation. This area
of Coffey Creek exhibited some streambank erosion, however surface protection was present in the
form of vegetation and mosses (bank erosion hazard index for the right bank was rated as
`moderate').
No changes or restoration activities will be made to the streambed, pattern, or profile of Coffey
Creek. The focus of restoration activities will be to stabilize disturbed and exposed streambanks and
buffer extending up to 10 feet laterally from top of bank using bioengineering materials.
2.2 Restoration Specifications
2.2.1 Streambank Grading
Limited areas where disturbance caused steepened bank slopes from displaced sediments may be
recontoured to facilitate coir fiber matting and/or live stake installation (Figure 2-1). If grading is
necessary, the streambank slope would be returned to its original grade or a 3:1 (horizontal to
vertical) slope.
November 22, 2022 1 3

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
MAINTAIN EXISTING REINSTALL EXISTING SOIL.
DRAINAGE
WOVEN COIR FIBER MAT
WITH LIVE STAKING
SEED AND MULCH
L VE STAKING
MATERIAL TO BE REMOVED
EXISTING CHANNEL BANK
COMPACTED FILL (ONLY IF FILL
CIRCUMSTANCES EXISTS)
VARIES
BASE FLOW
V WATER LEVEL
Figure 2-1. Grade and stabilization of banks (if applicable)
2.2.2 Coir Fiber Stabilization
Coconut coir fiber matting will be installed on disturbed streambanks and surfaces to limit potential
for erosion until herbaceous and woody vegetation is established. Natural fiber matting such as
coconut fiber are biodegradable and lower the risk of wildlife entrapment (as compared to plastic
netting).
Coir fiber matting will be installed from the toe of slope to the top of bank, with backfill trench -
anchoring at the top and bottom and matting stakes on the bank face to hold the matting in place
(Figure 2-2). A permanent riparian seed mix and a temporary seed mix (Section 2.2.3) would be
spread prior to coir fiber matting installation. Wheat straw will be placed beneath the coir fiber
matting to anchor the seed mix to the bank.
4 (November 22, 2022

Coffey Creek Restoration Planting Plan FN.
Charlotte Douglas International Airport
TOP OF BUJN ANCHOR
(SEE DETAIL, THIS SHEET) TOP OF BANK
DEAD STOUT STAKE,
TYPICAL (SEE DETAIL,
THIS SHEET)
MATTING ENERI
(SEE DETAIL, THIS SHEET)
PATTNG STAKE, TYPICAL (SEE 1107E 1)
TOE OF BANK ANCHOR (SEE DETNL. THIS SHEET)
CROSS-SECTION
Inon"
(SFE NOTE IJ
UNTREATED
2. K 1' (NOMINAL)
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xA
MATTING. TYPICAL
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(sEE DETAIL. THIS SHEET)
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—APPROxIMA1E ThOL
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TOE OF BANK
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DEAD STOUT STKKE. TYPICAL
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(WOODEN 2"xl" NOMINAL)
NOT TO SCALE
M MS
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Figure 2-2. Coconut Coir Fiber Matting Installation Details
2.2.3 Revegetation
Woody and herbaceous species will be used to establish and stabilize the streambanks and
vegetated buffer in the disturbance area, including live stakes along the stream bank face and
containerized trees and shrubs from top of bank landward consisting of native, locally sourced
species and permanent native riparian and temporary seed mixes. Techniques to be used depends
on the zone of restoration. For example, live stakes with higher moisture tolerance will be placed on
the stream bank faces nearest the surface water elevation (i.e., Zone 1, Figure 2-3). The size of
shrubs and trees planted will also depend on the zone of restoration; live stakes will be used in
areas with steeper gradient along the bank faces and larger trees and shrubs (e.g., container or ball -
and -burlap plants) will be planted in lower -gradient areas such as floodplain or top of bank landward.
Most of the disturbed reach contains steep banks from toe of slope to top of bank with the floodzone
contained within the limits of the channel (i.e., a bankfull bench is absent); however, an area of
approximately 75 linear feet at the upstream end of the disturbed area exhibits lower gradient banks
and falls within the 1.0 percent annual chance floodplain zone, and therefore may support larger -
sized tree and shrub species for Zone 1.
November 22, 2022 1 5

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
25-2 Riffle Zone 2 ft)
(10 —.
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of
-11
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-12
0 5 10 15 20 25 30 35 40 45 50 55 60
Horizontal Distance (feet)
Bankfull Width - -Flood-Prone Width Water Surface
Figure 2-3. Proposed Planting Zones
Total area of each planting zone was estimated from data collected during the pre -construction
stream geomorphology survey for site S25-2, which is within the area of disturbance (Figure 2-3,
Table 2-1). Zone 1, the area representing the streambank faces, was calculated from the elevation
of the toe of slope to top of bank elevation. Zone 2 was calculated as the permitted buffer area,
which extends from the top of bank plus 10 feet laterally. The total area was calculated on an
assumed 500-linear foot restoration area.
Table 2-1. Estimated Area of Planting Zones
Zone
Area
Square Feet Acres
Zone 1 - Streambank 3,550 0.08
Zone 2 - Upland (Top of Bank) Vegetated Buffer 5,000 0.11
Total 8,550 0.20
Species selected for re -vegetation will be based on the location of planting (i.e., zone) as it relates to
size (e.g., live stakes), stratum (tree versus shrub), and moisture requirements and tolerance. The
vegetated buffer should contain a mixture of trees and shrubs to provide sufficient habitat and
stabilization of the disturbed area. Table 2-2 provides a variety of native trees and shrubs from which
a minimum of four different species will be selected for planting.
6 (November 22, 2022

Coffey Creek Restoration Planting Plan EN
Charlotte Douglas International Airport
Table 2-2. Potential Native Tree and Shrub Species for Planting by Zone
Common Name
Botanical Name Stratum Form Size
Spacing
Zone 1 - Streambank
Silky Dogwood Corpus amomum
Shrub Live stake 1/2-1 1/4" cal 2.0' O.C.
Silky Willow Salix cericea
Shrub Live stake 1/2-1 1/4" cal 2.0' O.C.
Elderberry
Sambucus canadensis Shrub Live stake
1/2-1 1/4" cal 2.0' O.C.
Zone 2 - Upland Vegetated Buffer
Tag alder Alnus serrulata
Shrub Container 3 gallon 10' O.C.
Red Chokeberry Aronia arbutifolia
Shrub Container 3 gallon 10' O.C.
Coralberry Symphoricarpos orbiculatus Shrub
Container
3 gallon 10' O.C.
Southern Arrowwood Viburnum dentatum
Shrub Container 3 gallon 10' O.C.
Boxelder Acer negundo
Tree Container 3 gallon 10' O.C.
Red Maple Acer ruburm
Tree Container 3 gallon 10' O.C.
River Birch
Betula nigra Tree
Ball and burlap
1-1 1/2" cal 40' O.C.
Container
3 gallon 10' O.C.
Green Ash
Fraxinus pennsylvanica Tree
Ball and burlap
1-1 1/2" cal 40' O.C.
Container
3 gallon 10' O.C.
Sycamore
Platanaus occidentalis Tree
Ball and burlap
1-1 1/2" cal 40' O.C.
Container
3 gallon 10' O.C.
Pawpaw
Asmina triloba
Shrub Container 3 gallon 10' O.C.
Redbud
Cercis canadensis
Shrub Container 3 gallon 10' O.C.
Flowering Dogwood Corpus florida
Shrub Container 3 gallon 10' O.C.
Possumhaw Ilex decidua
Shrub Container 3 gallon 10' O.C.
Winterberry Ilex verticallata
Shrub Container 3 gallon 10' O.C.
Spicebush Lindera benzoin
Shrub Container 3 gallon 10' O.C.
Southern Arrowwood Viburnum dentatum
Shrub Container 3 gallon 10' O.C.
Boxelder
Acer negundo
Tree Container 3 gallon 10' O.C.
Red Maple Acer ruburm
Tree Container 3 gallon 10' O.C.
River Birch Betula nigra
Tree Ball and burlap 1-1 1/2" cal 40' O.C.
November 22, 2022 1 7

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
Common Name Botanical Name Stratum Form Size Spacing
Container
3 gallon 10' O.C.
Green Ash
Fraxinus pennsylvanica Tree
Ball and burlap
1-1 1/2" cal 40' O.C.
Container
3 gallon 10' O.C.
Black Walnut Juglans nigra Tree Container 3 gallon 10' O.C.
Black Gum Nyssa sylvatica Tree Container 3 gallon 10' O.C.
Sycamore
Platanaus occidentalis Tree
Ball and burlap
1-1 1/2" cal 40' O.C.
Container
3 gallon 10' O.C.
Willow Oak
Quercus phellos Tree
Ball and burlap
1-1 1/2" cal 40' O.C.
Container
3 gallon 10' O.C.
American Elm Ulmus americana Tree Container 3 gallon 10' O.C.
cal = caliper
O.C. = on -center
8 INovember 22, 2022

Coffey Creek Restoration Planting Plan EN
Charlotte Douglas International Airport
Per the Guidelines for Riparian Buffer Restoration by the North Carolina Department of Environment
and Natural Resources (now the N.C. Department of Environmental Quality), trees should be
planted at a density of 436 trees per acre and shrubs planted at a density of 1,200 shrubs per acre
(NCDENR 2004). Table 2-3 provides the estimated quantity of trees and shrubs recommended to be
planted based on these densities.
Table 2-3. Estimated Quantity of Shrubs and Trees Recommended for Vegetated Buffer
Restoration
Stratum Shrubs
Form live stakes container
Spacing 2.0-ft O.C. 10.0-ft O.C. 10.0-ft O.C.
Trees
container ball and burlap Total
40.0-ft O.C.
Zone 1
Zone 2
Total
888
138 46
888 138 46
888
4 188
4 1,075
0.C. = on -center
A riparian seed mix of species native to the North Carolina Piedmont region (Table 2-4) will be
applied within the buffer to provide long-term bank stability and habitat. Based on a rate of 20
pounds per acre, approximately 3.9 pounds of seed mix will be applied across the restoration area.
The native riparian seed mix should be planted along with a temporary cover seed mix; the native
seed mix can be planted at any time of year; however, the temporary cover seed mix is dependent
on time of year (Table 2-5).
Table 2-4. Permanent Riparian Seed Mix*
Common Name
Botanical Name
Percent
of Mix
Beaked Panicgrass
Common Sneezeweed
Fox Sedge
Indiangrass
Lanceleaf Coreopsis
New York Ironweed
Partridge Pea
Redtop Panicgrass
River Oats
Soft Rush
Switchgrass
Panicum anceps
Helenium autumnale
Carex vulpinoidea
Sorghastrum nutans
Coreopsis lanceolata
Vernonia noveboracensis
Chamaecrista fasciculata
Panicum rigidulum
Chasmanthium latifolium
Juncus effusus
Panicum virgatum
Virginia Wildrye Elymus virginicus
*ERNST Seeds ERNMX-307 NC Piedmont Riparian mix
Table 2-5. Temporary Cover Seed Mix
10.0
0.2
2.0
29.9
2.0
0.4
3.0
5.0
5.0
0.5
20.0
20.0
Date
Seed
Planting Rate
Sept. 1 — April 31
May 1 — Aug. 31
Rye grain
Millet
10 pounds /acre
10 pounds /acre
November 22, 2022

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
3 Post -Restoration Assessments
Visual assessments of the restored vegetated buffer along Coffey Creek will be made during regular
construction oversight visits and during post -construction stream monitoring activities, as detailed
and planned in the approved Monitoring Plan for the SCFT Project and summarized in Table 3-1.
Assessments will consist of a visual estimation of percent vegetative cover in several locations along
the restored buffer area with photographic documentation. The success criteria will be defined by 60
percent vegetative cover following the first full growing season and 80 percent vegetative cover
following the second growing season.
Table 3-1. Post -Restoration Visual Assessments
Event
Frequency Schedule
Construction Oversight Bimonthly
Post -Construction 1 visit
Annual 1x/year for 5 years
Ongoing to completion of construction
activities
Within 30 days of Project completion
First annual visit will be made 6 months
following completion of the Project
4 Reporting and Maintenance
Findings from visual assessments will be documented in technical memos or otherwise
communicated with the NCDWR. Any areas of significant erosion observed during visual
assessments will be remediated as soon as possible. If greater than 20 percent of live stakes or
rooted plants fail to survive and there is not a sufficient amount of volunteer recruitment to stabilize
the area, supplemental plantings would be conducted to maintain target stem densities mentioned in
Section 2.2.3 (CSWS 2018).
Rapid response by the Airport following the initial discovery of buffer disturbance, this proposed
restoration planting plan, and monitoring of the site for a period of two years following restoration
activities will ensure the long-term success of the restored Coffey Creek vegetated buffer and
streambanks.
10 (November 22, 2022

Coffey Creek Restoration Planting Plan F)1
Charlotte Douglas International Airport
5 References
Charlotte -Mecklenburg Storm Water Services. 2018. CSWS Mitigation Monitoring
Guidance Document, Version 3.0. July 2018.
N.C. Department of Environment and Natural Resources (NCDENR). 2004. Guidelines
for Riparian Buffer Restoration. Ecosystem Enhancement Program.
November 22, 2022

Coffey Creek Restoration Planting Plan
Charlotte Douglas International Airport
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12 (November 22, 2022

FY
440 S Church Street, Suite 1200
Charlotte, NC 28202-2075
704.338.6700
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