20151170 Ver 1_StreamRelocation_20160121

CWS,I.
AROLINA ETLANDERVICESNC
550 E. Westinghouse Blvd.
Charlotte, NC 28273
704-527-1177 (office)
704-527-1133 (fax)
January 12, 2015
Mr. Alan Johnson
NC DWR – 401 & Buffer Permitting Unit
512 N. Salisbury Street
th
9 Floor Archdale Building
Raleigh, NC 27603
Subject: Stream Relocation Plan
Creek’s Landing (DWR #15-1170)
Union Co., North Carolina
CWS Project No. 2015-3535
Dear Mr. Johnson:
The Creek’s Landing site is approximately 135 acres in extent and is located south from the intersection of
Weddington Road and Airport Road in Union County, North Carolina (Figure 1, attached). The purpose of
this project is to develop a residential subdivision in a developing area of Union County, North Carolina.
Carolina Development Services, LLC, has contracted Carolina Wetland Services, Inc. (CWS) to provide
Section 404/401 permitting services for this project. Per a condition set forth in the issued 401 Water
Quality Certification (DWR # 15-1170, attached), a stream relocation plan is necessary to be approved by
your office prior to commencing the impacts proposed for the project.
Applicant Name:
Carolina Development Services; POC: Mr. Johnathan McCall
Mailing Address:
6707 Fairview Road, Suite B, Charlotte, NC 28210
Phone Number of Owner/Applicant:
704-401-7185
Street Address of Project:
south from the intersection of Weddington Road and Airport Road in
Union County, North Carolina
Waterway:
UTs to East Fork Twelve Mile Creek
Basin:
Catawba (HUC 03040103)
City:
Union County Incorporated
County:
Union
Tax Parcel ID numbers:
060-030-23, 060-060-12, and 060-030-15
Decimal Degree Coordinate Location of Project Site:
35.001359º, -80. 655074º
USGS Quadrangle Name:
Matthews, NC (1988) and Waxhaw, NC (1986)
Site Conditions
The project area consists mostly of forested land and open fields (Figure 2, attached). Typical on-site
vegetation includes willow oak (Quecus phellos), sweetgum (Liquidambar styraciflua), Chinese privet
(Ligustrum sinense), winged elm (Ulmus alata), red maple (Acer rubrum), mockernut hickory (Carya
tomentosa), Japanese honeysuckle (Lonicera japonica), sawtooth blackberry (Rubus argutus), greenbrier
(Smilax rotundifolia), Christmas fern (Polystichum acrostichoides), and muscadine (Vitis roduntifolia).
·
NORTH CAROLINA SOUTH CAROLINA
WWW.CWS-INC.NET

Creek’s LandingJanuary 12, 2015
Stream Relocation Plan CWS Project No. 2015-3535
Purpose and Need for the Stream Relocation
There are eight jurisdictional seasonal RPW stream channels (Streams A-H) and four jurisdictional
wetlands (Wetlands AA-DD) located within the project area (Figure 3, attached). On-Site streams are
unnamed tributaries to East Fork Twelve Mile Creek. The purpose of the project is to develop
approximately 35 acres of the 48 acre property into a single-family subdivision consisting of 68 lots
(Figures 4, attached). This will result in impacts to jurisdictional waters of the U.S.
The original plan for the proposed road crossing was a piped conveyance instead of the currently proposed
culvert (Figure 5, attached). This original plan included a 153 lf, 30-inch, “L”-shaped reinforced concrete
pipe (RCP) with a 15 lf rip rap apron at the outlet.Permanent impacts associated with this design totaled
167 linear feet of Stream B.
In order to reduce impacts to jurisdictional waters of the U.S., a straight culvert with stream relocation was
chosen in lieu of a piped conveyance (Figures 6 and 7, attached). A straight culvert is the favored design as
it will maintain aquatic life passage, is easier to maintain, and has a lower potential to clog versus a piped
conveyance. Permanent impacts associated with this culvert installation total 109 lf of Stream B. Due to a
an extreme bend in Stream B, 125 linear feet of temporary impacts is proposed for relocation This
relocation will allow for the culvert to be aligned with downstream waters at the outlet, but creates a
loss of 15 lf during the relocation of the existing stream to the relocated stream (Stream 7, attached).
In order to maintain minimal impacts, the proposed impacts to Stream B total 249 lf, consisting of 109
lf of permanent impacts (culvert installation), 125 linear feet of temporary impacts (relocation), and a
15 lf net loss (from existing to relocated). Impacts are summarized in Table 1, below.
Table 1. Summary of proposed impacts.
ImpactTemporary
Jurisdictional Impacts
Type orImpacts (acre)
Feature(linear feet)
Permanent
Road Crossing (Culvert)Permanent 109 0.01
Stream relocation Temporary 125 0.01
Stream B
Stream relocation (net
Permanent 15 0.00
loss of waters)
Total Permanent Stream Impacts 1240.01 acre
Total Temporary Stream Impacts 1250.01 acre
Total Stream Impacts 249 lf 0.02 acre
The proposed culvert is a 100-linear foot, 30-inch reinforced concrete pipe (RCP) with headwalls at
both the inlet and outlet of the culvert. The proposed culvert will be buried at least six inches below
the bed of the channel to allow passage of aquatic life and maintain low flows. Impacts associated with
the straight culvert design were reduced through the use of headwalls at the inlet and outlet of the proposed
culvert in order to minimize the length required for the proposed crossing. The proposed culvert is also
designed to maintain bankfull channel dimensions upstream and downstream of the proposed culvert.
In-stream structures will provide stabilization and prevent upstream incision, as necessary. Natural
coconut matting, riparian seed, and native plants will be installed on both sides of the relocated Stream
B for bank stabilization and erosion control. Vegetation species will be chosen to fit in with the
existing plant community, as well as add diversity, particularly in the riparian zone. Currently, much
of the riparian area is dominated by invasive Chinese privet. Chinese privet and other invasive species
such as Japanese honeysuckle will be removed and/or treated.
2

Creek’s LandingJanuary 12, 2015
Stream Relocation Plan CWS Project No. 2015-3535
All channel work will be constructed in the dry in accordance with Water Quality Certification No.
3890. Proper sediment and erosion control measures will be used to minimize disturbances to
downstream waters.
Methods
A geomorphic survey was performed by CWS scientists Kelly Thames, Wetland Professional in
Training (WPIT), Kaitlin McCulloch, Staff Scientist I, and Ben McGuire, Staff Scientist I on
December 28, 2015. This assessment included a longitudinal profile and representative cross sections
of the existing stream channel (Figures 8 – 11, attached). Due to the extreme bend in Stream B, the
relocation is necessary in order to align the proposed culvert with downstream waters. The stream
relocation plan proposes for Stream B to exit the proposed culvert and flow for a relocated 125 lf to a
logical tie-in point downstream. This plan ultimately reduces permanent stream impacts from 249 lf to
124 lf.
Stream B exhibits stable characteristics and was determined a good reference reach to survey for the
relocated design. A longitudinal profile and cross sectional surveys were performed on a
representative riffle and a representative pool feature (Figures 9 – 11, attached). The average drainage
area for Stream B is approximately 0.064 square miles (41.16 acres), channel slope averages 0.018
ft/ft, and sinuosity is 1.17 ft/ft. Bankfull width and mean depth for this reach are 4.92 feet and 0.39
feet, respectively, with a bankfull area of 1.91 sq. ft. and width/depth ratio of 12.66. The flood prone
width for this reach is 10 feet and greater. Application of Rosgen Level II Stream Classification to a
representative riffle section identified Stream B as a C type channel (Table 2, below).
Stream Design
CWS developed a stream design for the relocation of Stream B downstream of the culvert installation
based on existing channel conditions (Figure 7, attached). This design will improve the goals of the
project and enhance future water quality by adding sinuosity to reduce sheer stress, increasing the
quality of epifaunal substrate, and enhancing the buffer with native riparian plantings. The old
channel will be filled and planted. Typical cross sectional dimensions for the relocation will be based
on the existing cross sectional dimensions (Figure 12, attached). A longitudinal profile was developed
for the relocation to exit the proposed culvert and tie-in to the existing channel at a logical downstream
location (Figure 13, attached).
3

Creek’s LandingJanuary 12, 2015
Stream Relocation Plan CWS Project No. 2015-3535
Tab
le 2. Summary of Existing and Design Stream Conditions
ProposedProposed
ParameterExisting
RifflePool
Length of Evaluated (ft.) 352125
Channel Dimensions
Bankfull Width (ft.) 4.925 5
Mean Bankfull Depth (ft.) 0.390.39 0.70
Width/Depth Ratio 12.66 12.66 5.87
Bankfull Area (sq. ft.) 1.911.91 2.86
Bankfull Maximum Depth (ft.) 0.76 0.76 1.17
Width Floodprone Area (ft.) >10>10 >10
Entrenchment Ratio 2.132.13 7.32
Channel Pattern
Sinuosity 1.17 1.21
Channel Profile
Channel Slope 0.0180.035
Rosgen Stream Type CC
CWS will utilize a pump around to work in the dry and apply other erosion and sediment control
techniques to minimize sediment escape from the site during construction. These techniques include
employing coir fiber logs within the channel bed immediately downstream of the construction area.
These logs are meant to temporarily prevent downstream sediment migration and will be removed
once the channel has been stabilized with matting.
The relocated channel reach is designed to have profile and dimension similar to the upstream reach,
however it has been designed with added sinuosity. The restored stream will have similar channel
stability and dimensions to the original channel, as well as provide an uplift of aquatic function by
providing a higher quality riparian buffer through planting native plants and controlling invasive plant
species. The improvements to the relocated stream are designed to minimize erosion, downstream
sediment accumulation, and downstream scouring by redirecting flow and reducing sheer stress.
Planting Plan
Natural coconut matting (coir matting), native seed mix, live stakes, and native plants will be installed
on both sides of Stream B in various zones for bank stabilization and erosion control. Vegetation
species will be chosen based on the existing plant community and to add species diversity, particularly
in the riparian zone.
Stream banks consist of three zones: 1) lower stream banks, 2) upper stream banks, and 3) riparian
buffer (Figure 14, attached). Revegetation of the area directly adjacent to the relocated channel is
especially important to prevent erosion, downstream sedimentation, and provides important water
quality and habitat services. Wetland plant species such as silky dogwood (Cornus amomum), river
birch (Betula nigra), black willow (Salix nigra), and soft rush (Juncus effusus) will be planted on the
lower stream banks (Zone 1, approximately 506 square feet [sf]). Black willow and clusters of soft
rush will be planted on outside stream bends for dense rooting and erosion control. Upper stream
banks (Zone 2, approximately 782 sf) will be planted with other moisture-tolerant species such as
green ash and red maple. The riparian buffer (Zone 3, approximately 9,474 sf) will be planted with
4

Creek’s LandingJanuary 12, 2015
Stream Relocation Plan CWS Project No. 2015-3535
species such as ironwood, slippery elm, and spicebush (Lindera benzoin). All disturbed areas will be
seeded with temporary and permanent native riparian and wetland seed mixes, and stream banks will
be matted with natural coconut matting. Planting plan details are summarized in Table 3 (below) and
Figure 13 (attached).
Table 3. Proposed Planting Plan, Old Blair’s Mill Stream Relocation Project
Zone 1 - Lower Stream Banks (506 sq ft)
Common name Botanical name Size Spacing# of Plants
Soft rush Juncus effusus Plug 3' O.C. 100
Silky dogwood Cornus amomum Live stake 2' O.C. 45
Black willow Salix nigra Live stake 2' O.C. 45
Elderberry Sambucus canadensis Live Stake 2' O.C. 45
Zone 2 - Upper Stream Banks (782 sq ft)
Common name Botanical name Size Spacing# of Plants
Green ash Fraxinus pennsylvanica Bare root 4' O.C. 20
River birch Betula nigra Bare root 4' O.C. 20
Red maple Acer rubrum Bare root 4' O.C. 20
Zone 3 - Riparian Buffer (9,474 sq ft)
Common name Botanical name Size Spacing# of Plants
Spicebush Lindera benzoin One Gallon 8' O.C. 148
Green ash Fraxinus pennsylvanica One Gallon 10' O.C. 25
Red maple Acer rubrum One Gallon 10' O.C. 25
IronwoodCarpinus caroliniana One Gallon 10' O.C. 25
Slippery elm Ulmus rubra One Gallon 10' O.C. 25
5

Creek’s LandingJanuary 12, 2015
Stream Relocation Plan CWS Project No. 2015-3535
On behalf of Carolina Development Services, CWS is submitting this stream relocation plan in order
to satisfy the conditions required by the Section 401 Water Quality Certification.
Please do not hesitate to contact me at 704-408-1683, or through email at [e-mail] should
you have any questions or comments regarding this request.
Sincerely,
Gregg Antemann, PWS Kelly Thames, WPIT
Professional Wetland Scientist Project Scientist
Attachments: Figure 1. USGS Site Location Map
Figure 2. Aerial Imagery Map
Figure 3. Approximate Jurisdictional Boundary Field Map
Figure 4. Overall Site Plan
Figure 5. Originally Proposed Impacts
Figure 6. Proposed Impacts Overview
Figure 7. Proposed Stream Relocation Plan
Figure 8. Geomorphic Survey Overview
Figure 9. Existing Cross Section - Pool
Figure 10. Existing Cross Section - Riffle
Figure 11. Existing Longitudinal Profile
Figure 12. Typical Cross Section
Figure 13. Proposed Longitudinal Profile
Figure 14. Planting Plan
401 Water Quality Certification (DWR # 15-1170)
cc: Mr. Johnathan McCall, Carolina Development Services
6

I
Weddington Road
Airport Road
Legend
Project Limits
Excluded Parcel
2,0001,00002,000Feet
REFERENCE: 7.5 MINUTE TOPOGRAPHIC QUADRANGLE MATTHEWS, NC, DATED 1988 AND WAXHAW, DATED 1986
DATE:
SCALE:
FIGURE NO.
1" : 2000'10-26-2015
USGS Site Location Map
1
Copyright:© 2013 National Geographic Society, i-cubed
DRAWN BY:
CWS PROJECT NO:
AVH
2015-3535
Creek's Landing
Union Co., North Carolina
CHECKED BY:
APPLICANT NO:
KMT
CWS Project No. 2015-3535

I
Legend
Project Limits
Excluded Parcel
FIGURE NO.
4002000400Feet
2
REFERENCE: BACKGROUND AERIAL IMAGERY PROVIDED BY ESRI, ACCESSED
Source: Esri, DigitalGlobe, GeoEye, i-cubed, Earthstar Geographi
GIS User Community

Wetland DD
~ 0.004
Perennial RPW A
Seasonal RPW E
~ 1,097 lf
~ 319 lf
Seasonal RPW A
~ 362 lf
Wetland AA
~ 0.043
Wetland BB
~0.100 acre
Seasonal RPW F
Wetland CC
~ 63 lf
~0.004 acre
Seasonal RPW C
1
~ 159 lf
Legend
Seasonal RPW B
~ 703 lf
Project Limits
Excluded Parcel
Seasonal RPW
Perennial RPW
Seasonal RPW H
Ephemeral conveyance~ 133 lf
Seasonal RPW D
Wetlands
~ 277 lf
Ÿ
*
Photo Location & Direction
Stream Classification Point
SCP
Data Point
DP
Seasonal RPW G
FIGURE NO.
~ 676 lf
Perennial RPW B
REFERENCE: BACKGROUND AERIAL IMAGERY PROVIDED BY ESRI, ACCESSED 2015.
3000300150Feet
3
~ 308 lf
JURISDICTIONAL FEATUES WERE DELINEATED (FLAGGED IN THE FIELD, CLASSIFIED,
AND SURVEYED WITH SUB-METER GPS BY CWS, DATED FEBRUARY 2015.
NOTE: JURISDICTIONAL FEATURES HAVE NOT BEEN VRIFIED BY THE USACE.

ProposedImpacts-Overview
P.O. BOX 7442
CHARLOTTE, NC 28241
OFFICE: 704.626.2800
FAX: [phone]
WWW.SUMMIT-COMPANIES.COM
REVISIONS:
CLIENT:
PROJECT:
ProposedImpacts
-Figure6.PlanViewandProfile
SHEET:
ProjectLimits
ORIG.PROJ.DATE :06-01-2015
SCALE :1" = 150'
DRAWN BY :RJG
CHECKED BY :MGV
PROJECT NO :
FIG.
SHEET
4
SEAL DATE :SEAL DATE :

SeasonalRPWB
-167lfpermanentimpacts(pipe)
153'30-inchRCPpipedconveyance
AlternativePlanView Figure
Creek'sLanding
5
UnionCo.,NorthCarolina
CWSProjectNo.2015-3535

ProposedImpacts-PlanViewandProfile
P.O. BOX 7442
CHARLOTTE, NC 28241
OFFICE: 704.626.2800
FAX: [phone]
WWW.SUMMIT-COMPANIES.COM
REVISIONS:
Legend
ProposedCulvert
Riprapapronisnot
ProposedImpact
CLIENT:
animpactto
ProposedSteamRelocation
jurisdictional
channelbecauseit
ProposedRelocatedStream
islocatedinnewly
AvoidedSeasonalStream
relocatedstream
AvoidedPerennialStream
SeasonalStreamB
PROJECT:
Proposedimpact:
-109lfpermanent
impact(culvert)
100linearfoot,30-inchRCP
(buried6''belowthestreambed)
Proposedstreamrelocation(140lf):
SHEET:
-15lfpermanentimpact(netloss)
-125lftemporaryimpact(stream
relocation)
Proposedrelocated
streamreach
ORIG.PROJ.DATE :06-01-2015
-125lf
SCALE :1" = 50'
PerennialStreamB
DRAWN BY :RJG
CHECKED BY :MGV
PROJECT NO :
Fig.
SHEET
6
SEAL DATE :SEAL DATE :

I
Stream B
- 109 lf permanent impacts (culvert)
100 lf, 30-inch RCP culvert
Stream B
- 15 lf permanent impacts (net loss from relocation)
- 125 lf temporary impacts (relocation)
Stream B
- 125 lf proposed relocation
Legend
Project Limits
Proposed Relocation
Permanent Impacts
Temporary Impacts
Seasonal RPW
Perennial RPW
REFERENCE: JURISDICTIONAL FEATURES WERE DELINEATED (FLAGGED
IN THE FIELD), CLASSIFIED, AND SURVEYED WITH A SUB-METER GPS UNI
DATED FEBRUARY 2015. BACKGROUND GRADING PROVIDED BY SUMMIT LAND
SERVICES, P.C.
5025050Feet
NOTE: JURISDICTIONAL FEATURES HAVE NOT BEEN VERIFIED BY THE USAC
DATE:
SCALE:
FIGURE NO.
1" : 50'10-26-15
Proposed Stream Relocation
8
7
DRAWN BY:
CWS PROJECT NO:
AVH
2015-3535
Creek's Landing
Monroe, North Carolina
UnionCo.
CHECKED BY:
APPLICANT NO:
KMT
CWS Project No. 2015-3535

I
Legend
Project Limits
Longitudinal Profile
Cross Sections
Seasonal RPW
Perennial RPW
REFERENCE: BACKGROUND GIS FILES PROVIDED BY UNION COUNTY GIS
5025050Feet
DEPARTMENT, DATED 2013.
GEOMORPHIC SURVEY CONDUCTED BY CWS, INC. ON DECEMBER 28, 2015.
DATE:
SCALE:
FIGURE NO.
1" : 50'1-6-2016
Geomorph Overview
8
DRAWN BY:
CWS PROJECT NO:
KMT
2015-3535
Creek's Landing
Monroe, North Carolina
CHECKED BY:
APPLICANT NO:
GCA
CWS Project No. 2015-3535

Cross Section 1-Pool
590
589
588
587
586
585
584
05101520253035404550
Station (ft.)
Bankfull WidthFlood-Prone WidthWater Surface
Parameter Existing Condition
Bankfull Width (ft.) 1.1
Mean Bankfull Depth (ft.)
0.7
Width/Depth Ratio 5.87
Bankfull Area (sq. ft.)
2.86
Bankfull Maximum Depth (ft.) 1.17
Width of Floodprone Area (ft.) > 33
Entrenchment Ratio
7.32
Sinuosity 1.17
Water Surface Slope (ft./ft.)
0.018
Rosgen Stream Type E


Cross Section 2-Riffle
589
588
587
586
585
584
0510152025303540
Station (ft.)
Bankfull WidthFlood-Prone WidthWater Surface
Parameter Existing Condition
Bankfull Width (ft.) 4.92
Mean Bankfull Depth (ft.)
0.39
Width/Depth Ratio 12.66
Bankfull Area (sq. ft.)
1.91
Bankfull Maximum Depth (ft.) 0.76
Width of Floodprone Area (ft.)
10.47
Entrenchment Ratio
2.13
Sinuosity 1.17
Water Surface Slope (ft./ft.)
0.018
Rosgen Stream Type C

Longitudinal Profile
593.0
592.0
591.0
590.0
589.0
588.0
587.0
586.0
585.0
584.0
583.0
582.0
581.0
580.0
579.0
578.0
577.0
576.0
575.0
Station (feet)
Water SurfaceThalwegRTOBRBKFLTOBLBKF

.“‰EҌŒÞz7·w
x
.“‰EҌŒ5;¦·w
ux
Typical Cross Section

Longitudinal Profile -Relocation
593.0
592.0
591.0
590.0
589.0
588.0
587.0
586.0
585.0
584.0
583.0
582.0
581.0
580.0
579.0
578.0
577.0
576.0
575.0
Station (feet)
Water SurfaceExisting ThalwegRTOBLTOBRBKFLBKFProposed Thalweg

I
Proposed Culvert
old channel to be filled and planted
Zone 1 - Lower Stream Banks (506 sq ft)
Legend
Common nameBotanical nameSizeSpacing# of Plants
Soft rushJuncus effususPlug3' O.C.100
Silky dogwoodCornus amomumLive stake2' O.C.45
Project Limits
Black willowSalix nigraLive stake2' O.C.45
ElderberrySambucus canadensisLive Stake2' O.C.45
Perennial RPW
Zone 2 - Upper Stream Banks (782 sq ft)
Common nameBotanical nameSizeSpacing# of Plants
Seasonal RPW
Green ashFraxinus pennsylvanicaBare root4' O.C.20
River birchBetula nigraBare root4' O.C.20
Old Channel
Red mapleAcer rubrumBare root4' O.C.20
Zone 3 - Riparian Buffer (9,474 sq ft)
Lower Stream Banks (506 sf)
Common nameBotanical nameSizeSpacing# of Plants
SpicebushLindera benzoinOne Gallon8' O.C.148
Upper Stream Banks (782 sf)
Green ashFraxinus pennsylvanicaOne Gallon10' O.C.25
Red mapleAcer rubrumOne Gallon10' O.C.25
IronwoodCarpinus carolinianaOne Gallon10' O.C.25 Riparian Buffer (9,474 sf)
Slippery elmUlmus rubraOne Gallon10' O.C.25
5025050Feet
REFERENCE: BACKGROUND GIS FILES PROVIDED BY UNION COUNTY GIS
DEPARTMENT, DATED 2013.
GEOMORPHIC SURVEY CONDUCTED BY CWS, INC. ON DECEMBER 28, 2015.
DATE:
SCALE:
FIGURE NO.
1" : 50'1-6-2016
Planting Plan
14
DRAWN BY:
CWS PROJECT NO:
KMT
2015-3535
Creek's Landing
Monroe, North Carolina
CHECKED BY:
APPLICANT NO:
GCA
CWS Project No. 2015-3535

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