Cleveland Bluffs Stream Restoration Plan V3_6-13-24 (reduced)

Cleveland Bluff s
Stream Restoration Plan
Requested By:
KG Plaza, LLC
Mr. Jack Carlisle & Mr. Fields Carlisle
8620 River Road
Wilmington, NC 28412
Prepared By:
150utkern Environmental Group, Inc.
5315 South College Road, Suite E
Wilmington, NC 28412
910.452.2711
Date:
June 13, 2023 — V3

Cleveland Bluff s Stream Restoration Plan
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1. Introduction
KG Plaza LLC seeks to restore 456 linear feet of an unnamed tributary to Middle Creek in the Neuse
River Watershed, in Johnston County, North Carolina. The unnamed tributary (UT 1) was piped as part
of ongoing development activities. This Restoration Plan has been composed to address the North
Carolina Division of Water Resources (NCDVvR) concerns outlined in their Notice of Violation dated
June 24, 2019. This document will summarize the history of UT 1, pre- and post -disturbance site
conditions, and the proposed Restoration Plan.
II. Location
The site is located within the Cleveland Bluffs subdivision, located south of the intersection of
Cornwallis Road and Cleveland Road, near Garner, NC (see Attachment I — Vicinity Map). UT 1 is
located along the west side of the clubhouse and north of an existing pond. It is in the Neuse River
Basin, and the Upper Neuse subbasin. The 8-digit HUC is 03020201. This site is not located within a
Neuse River Basin Targeted Local Watershed. The USGS Edmondson quad was utilized for this
document (see Attachment 2 — USGS Topo Map).
111. Watershed Data
The general watershed area of Middle Creek is comprised of single-family subdivisions and agricultural
land. According to the USGS tool StrearnStats, UT I has a drainage area of 20 acres (0.0313 sq. mi.)
(see Attachment 3 — Drainage Area Map). The watershed consists of a portion of the Cleveland
Elementary School, Cornwallis Road, some wooded areas, rural pasture, and meadow.
IV. Existing Site Conditions
A. Pre -development Conditions
Historically, the entire area of the subdivision was agricultural land. UT I was likely channelized
to maintain good farm drainage pre-1950. Cleveland Elementary, constructed in approximately
2004, lies to the northeast of UT 1. It appears that most of the stormwater generated from
impervious surfaces on this property is collected via stormwater inlets and piped directly into the
channelized feature upstream of UT 1. Most recently, UT 1 was part of a residential parcel, that
contained a single mobile home. There was a cultivated field along the west side of UT 1 up until
2015, and a smaller cultivated field on the east side of UT 1, north of the mobile home until 2015.
A soil road provided access from Cornwallis Road, which had a culverted crossing over the
unnamed tributary. There was also a culverted crossing downstream, at the point that UT 1 enters
the existing pond. UT I was a relatively straight channel, with, at best, intermittent flow, based on
in -person observations. The feature did not have any benching or steep banks and was regularly
mowed by the landowner. The lower third of this channel had been possibly excavated and
impounded sometime after 2006, based on Google Earth imagery (see Attachment 4 — 2014 Google
Earth Aerial). On April 24, 2015, Johnston County made a sitewide Neuse River Buffer
Determination. UT I (Feature B on Buffer Call) was determined to be "not subject" to the Johnson
County Neuse River Buffer Ordinance. (see Attachment 5 — Neuse River Buffer Call).
No N.C. Stream Assessment Method (NCSAM) forms were completed before UT I was piped.
However, based on available historical aerial imagery, extensive experience, and observations of
similar drain -ways, it is likely that UT 1 would score as a low -quality stream in both ratings classes
(USACE and NCDWR). Based on these ratings, UT 1 seemed to only serve as a low functioning
conduit for upstream stormwater to quickly move through the channel and enter the existing pond.

Cleveland Bluff s Stream Restoration Plan
5r-Gi
This rapid movement through the system would have provided little uplift or value to downstream
water quality.
B. Current Conditions
The upstream off -site reach of UT 1 could be classified as a channelized headwater stream. The
culvert at the upstream end of UT 1 was moved as part of installation of an asphalt pedestrian
walking trail to serve the subdivisions residents. UT 1 was then piped down to an existing pond.
The site was then graded and stabilized with grasses and is mowed and maintained as green space.
C. Soils
According to the Soil Survey of Johnston County, UT 1 is mapped as Cowarts loamy sand, 2 to 6
percent slopes. This well drained soil was formed on ridges on marine terraces and is comprised of
loamy and sandy marine deposits.
D. Existing Plant Communities
The site is currently regularly mowed and maintained as green space for the subdivision.
E. Threatened and Endangered Species
According to N.C. Natural Heritage Program, there are no element occurrences within UT 1.
V. Restoration Plan
To restore UT I to stream configuration, the existing pipe will be removed, and the channel restored in
its original footprint ( see Attachment 6 —Post-Development Impacts to Stream and Wetlands and
Proposed Mitigation, Restoration of Channel). The lower third of UT 1 was a pond pre -impact but will
be restored to a continuous channel down to the culvert under the amenities access road which flows to
the exiting pond resulting in approximately 456' of stream channel. The culvert at the upper and lower
ends of the restoration area will be buried 20%.
The basic stream design includes a 2' channel bottom, slightly larger than the average width of the
original bottom which will reduce the velocity and allow longer water retention within the stream bed.
The channel bottom will be on a 1.4 1 % grade or slope, similar to the original channel. The base channel
banks are designed to be on a 2:1 slope. A 3' wide bank -full -bench is designed on either side of the
base channel. This has a 3:1 slope extending to the top -of -bank.
The stream banks will be lined with coir matting anchored in place and overseeded. Based on velocity
calculations, seeding the coir matted banks with Class C or D vegetation will meet 2-year and 10-year
events. The site will be stabilized with the appropriate wetland seed mix and a variety of non -wetland
seed and live stakes higher on the banks and adjacent to the channel. Additionally, the headwater of
this tributary is comprised of mature tree and shrub species, which will also provide a seed source for
volunteer site appropriate species over time. Irrigation of the restoration planting will be done as
necessary. Please see Attachment 6 for stream design drawings and Channel Analysis Worksheet.
The construction sequence would include removal of the pipe and stabilizing the channel in one event.
During this time, sediment and erosion control measures will be utilized to prevent sediment discharge
into downstream waters. While we would hope this can be accomplished in 2 weeks, it will be weather
dependent and may take longer in adverse conditions. All soil removed during this process will be
placed in the spoil area shown on Sheet 6. 1.

Cleveland Bluff s Stream Restoration Plan
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To start the restoration, process the restoration plan does require the approval of NC DWR and the
USACE. This restoration plan is included in the current Nationwide Permit request. Once we have
received approval to begin the restoration process, work will begin as soon as possibly but with some
consideration of the growing season and germination requirements of the approved seed mix. We would
propose an approximate start date of May 15' and approximate completion by June 30'. We do realize
that we have 120 days from the approval date to complete the restoration process and will adjust our
timeline accordingly to meet the agreed upon deadline.
V1. Monitoring Plan
The monitoring plan for the site will follow the guidance outlined in the U.S. Army Corps of Engineers
— Wilmington District Public Notice: Notification of Issuance of Guidance for Compensatory Stream
and Wetland Mitigation Conducted for Wilmington District (October 24, 2016). Monitoring data
collected on the site will include photos, plant survival analyses, and channel stability analyses.
Monitoring will take place quarterly for the first year and then annually for a total of 5 years, unless the
NCDWR and USACE agrees the site has met the success criteria and monitoring can be stopped. Early
completion of monitoring will only be provided through written approval from the NCDWR and
USACE. Annual monitoring reports will be submitted to these agencies no later than November 30 of
each monitoring year.
A. Stream Monitoring
Stream monitoring and reports will include monitoring of the vegetative, hydrologic, and
geomorphic ftinctions of the restored channel. This will include two cross sections (1 riffle, 1 pool).
Channel stability will be assessed yearly, to track performance of the restoration work. Visual
inspection to assess hydrologic regime will be conducted at each monitoring event, to include
assessment of channel establishment and migration, overbank events, and ordinary high-water
indicators. Vegetation will be monitored for health and vigor, to include documentation of the need
for additional plantings as necessary to maintain channel stability. Visual monitoring will be
conducted by traversing the entire mitigation site to identify and document areas of poor plant
vigor, areas dominated by undesirable volunteer species, prolonged inundation, native and exotic
invasive species, or other areas of concern. Additionally, two quadrats will be utilized to track
species, coverage, stem density and vigor.
B. Success Criteria
Succuss criteria for UT I will be accomplished after the following parameters are met.
1. Bank stabilization — 90% of the stream bank is observed to be stable, with no signs of ongoing
erosion (bank rilling or head cutting).
2. Vegetation — 90% of the planted stems survive with 90% vegetative cover of the restored area.
3. All required repairs for site stabilization and success are made expeditiously.
V11. Pond Berm Removal
The berm will be lowered to at or about the water level and a culvert located along the eastern
side of the pond will be removed. This will involve the removal of the existing trees, the
existing culvert, and a portion of the berm material. All items will be removed, placed in
uplands and stabilized. Suitable plant species, such as Willow trees maybe planted. See
Figure 7. 4

Cleveland Bluff s Stream Restoration Plan
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Attachment I
Location Map

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0 0.1250.25 0.5 0.75 1 Miles Vicinity Map N
1 inch = 1 miles Cleveland Bluffs Stream Restoration
Clayton, Johnston Co., N.C.
9
Map Source: ESRI Street Maps 12/18/2020 019-115.01 S

Cleveland Bluff s Stream Restoration Plan
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Attachment 2
USGS Topo Map

-170
BALMO
�Mo
Stream Restoration Project Area
0 200 400 800 1,200 1,600 USGS Topo Map
Feet
Cleveland Bluffs Stream Restoration
1 inch = 800 feet Clayton, Johnston Co., N.C.
Map Source: USGS TopoVlew Service, P4-
2016 Edmondson panel, 7.5'quad, 1:24k scale 12/18/2020 019-115.01 S

Cleveland Bluff s Stream Restoration Plan
15E-6i
Attachment 3
Drainage Area Map

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StreamStats Watershed Area
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Miles
1 inch = 0 miles Cleveland Bluffs Stream Restoration w
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Map Source: 2019 NCOneMaps Orthoirnagery, Garner, Johnston Co., N.C. 14 ( '511ci
USGS StrearnStats Service 12/18/2020 019-115.01 S i-- - )
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Cleveland Bluff s Stream Restoration Plan
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Attachment 4
2014 Google Earth Aerial

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Cleveland Bluff s Stream Restoration Plan
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Attachment 5
Neuse River Buffer CaU

6"""" W"11/4
DEPARTMENT OF PUBLIC UTILITIES
POST OFFICE BOX 2263
SMITHFIELD, N.C. 27577
[phone]
May 19, 2015
Donnie Adams, PE
DC Adarns Engineering, Inc.
335 Athletic Club Blvd.
Clayton, NC 27527
Subject: Neuse River Buffer Call
NBR# NB 15-005
Project Name: Cleveland Bluffs PUD (NC PIN# 163600-54-5620)
Location / Directions: Cornwallis Road, Garner, NC, approximately 0.30 miles south of the intersection
of Cornwallis Rd and Cleveland Rd. Parcel is located on east side of Cornwallis Rd.
Subject Stream: UT to Middle Creek (C,NSW)
Determination Date: April, 24, 2015 Staff: Carlos Bagley, PE
Feature
Stream
Type
(E/l/P)-
Not
Subject
Subject
Starili.6,
'Stop'@,
$Oil
Survey
USGS
Topq
Utitudd
(Dec.
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egrees)
Longitude
(Dec.
-Degrees)
A
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z
o
Pond not
sul�ject
z
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Al
1
0
Z
Below Pond
B
E
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1:1
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R
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H
Pond
M
R
R
71
'E111P = Epheineral / Intei-mittentl Perennial
Printed on recycled paper Co

Explanation: The feature(s) listed above that are checked "Subject" to the Johnston County Neuse
Riparian Buffer Ordinance (Section 14-393 Johnston County Code of Ordinances) has or have been
approximately shown on either the Soil Survey of Johnston County, North Carolina (1994) or the most
recent version of the 1:24,000 (7.5 minute) quadrangle topographic maps prepared by the United States
Geologic Survey (USGS), and have been located on the property and possess characteristics that qualify
it to be a stream. Each feature that is checked "Not Subject" has been determined not to be a strearn or
is not present on the property. There may be other streams located on your property that do not show up
on the maps referenced above but still may be considered jurisdictional according to the US Army Corps
of Engineers and/or the North Carolina Division of Water Resources.
This on -site determination shall expire five (5) years from the date of this letter. Landowners or
affected parties that dispute a determination made by Johnston County may request a
determination by the Director of the Division of Water Resources c/o the 401 and Buffer
Permitting Unit, or its successor. An appeal request must be made within sixty (60) days of the
date of this letter or from the date the affected party (including downstream and/or adjacent
owners) is notified of this letter. A request for a determination by the Director must be submitted
in writing with a copy of this letter to:
North Carolina Division of Water Resources
401 & Buffer Permitting Unit
1650 Mail Service Center
Raleigh, North Carolina 27699-1650
This determination is final and binding unless, as detailed above, a request for an appeal has been
made in writing within sixty (60) days.
The owner/future owners should notify the Division of Water Resources (including any Local,
State, and Federal Agencies) of this decision concerning any future correspondences regarding the
subject property (stated above). This project may require a Section 404/401 Permit for the
proposed activity. Any inquiries should be directed to the US Army Corps of Engineers Raleigh
Regulatory Field Office at [phone] and the Division of Water Resources 401 & Buffer
Permitting Unit at [phone].
If you have any questions regarding this determination, please feel free to contact Carlos Bagley at (919)
209-8333 or via email at carlos.bagleyLujohnstornic,com.
Sincerely,
Carlos Bagley, PE
Envirom-nental Manager

R-i-parian Buffer/ Stream Determination
Property Info,
Sandra S, Allen
Soil Survey of Johnston County 9638 Cleveland Road
North Carolina Clayton, Nr, 27520
PIN# 163600-54-5620
USDA Soil Conservation Service
Johnston County Public Utilities 1994 Thomas Franklin Allen, Jr.
309 E. Market Street 2426 Cornwallis Road
P.O. Box 2263 Garner, NC 27629
Smithfield, NC 27577 PIN# 16300-63-2285

Riparian Buffer / Stream Determination
FEATURE A - Not
Subject
00
FEATURE E (UPPER
POND) - Not Subject
Z] FEATURED - Tu 7bi e c t7]
FEATURE G - Su bject
CHANE DRI FEATURE F (LOWER
POND) - Subject
z
FEATURE H - Not
Subject
ALLE
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Johnston County Public Utilities
309 E Market Street
P-0, Box 2263
Smithfield, INC 27577
Property Info:
USGS Topographical Map
Sandra S. Allen
9638 Cleveland Road
Edmondson Quad
Clayton, NC 27520
7.5-Minute Series
PIN# 163600-54-5620
2013
Thomas Franklin Allen, Jr.
2426 Cornwallis Road
Garner, NC 27529
PIN# 16300-63-2285

Cleveland Bluff s Stream Restoration Plan 5EGi
Attachment 6
Post -Development Impacts to Stream and Wetlands and Proposed Mitigation Restoration of
Channel
10

JURISDITIONAL STREAM
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TEMP. SA AGSI
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--64w—
(R IN)
STEE[--P--lPE ACROSS PATH
W1 TH BUMPERS
"CONS TRUCRO"HEAU"
WARNING SIGN ON PA TH
CONSTRUCTION SEQUEN
1. FLAG WORK LIMITS, SILT FENCE, AND AND STOCKPILE AREA.
2 HOLD S17E MEETING K17H COUNTY INSPECTOR PRIOR TO COMMENCING
ANY LAND DISTURBING WORK.
J. INSTALL CONS7RUCRON ENTRANCE.
4. INSTALL SILT FENCE, SAFETY FENCE (AS NEEDED IN PEDESTRIAN AREAS)
AND OTHER EROSION AND SEDIMENT CONTROL PRAC77CES SHOWN PRIOR
TO DEMOLITION, CLEARING, STRIPPING OF TOPSOIL AND ROUGH GRADING.
5. INSTALL PUMP, HOSES (STEEL PIPE AT CROSSINGS) AND S71LLING BASIN,
PLUG CHANNEL AND PIPE KITH SAND BAGS AND BEGEN PUMP AROUND
OPERA TION.
6. GRADE SHOULDER AND SLOPE TO PIPE DAYLIGHT AND BEGIN REMOVAL
OF EXIS71NG PIPE, GRADE CHANNEL SLOPES AND BED AS PIPE IS
REMOVED.
7 PREPARE AND STABILIZE CHANNEL SLOPES K17H COIR MAT71NG AND
SEED, DO NOT GRADE SLOPES MORE THAN WHAT CAN BE STABILIZED
BY THE END OF EACH DAY OF WORK.
8. ESTABLISH AND STABILIZE HAUL ROADS, STAGE EQUIPMENT AND
MA7ERIALS AND STOCKPILE TOPSOIL IN THE AREA SHOWN WHILE
MAINTAINING A 25' CLEAR AREA AROUND STOCK PILES.
9. EXCESS SOIL AND DEMOL17ION MATERIAL CAN BE HAULED TO PERMIT7ED
STOCKPILE AREAS LOCA7ED W7111N FUTURE PHASE.
la INSTALL SEEDING, MULCHING AND MAT77NG ON DISTURBED AREAS.
11. ALL EROSION AND SEDIMENT CON7ROL PRAC710ES ARE TO BE INSPECTED
WEEKLY AND AFTER ANY RAINFALL; REPAIR AS NECESSARY.
.00
"SOIL STABUZA770N NOTES
1. SOIL STABILIZATION TIMEFRAMES.-
STAGING & STOCKPILE AREA
S17E AREA DESCRIP77ON
STABILIZA71ON
71MEFRAME EXCEP71ONS
PERIME7ER DIKESSWALES
7 DAYS
NONE
DITCHES AND SLOPES
HIGH QUALITY ZONES (HQW)
7 DAYS
NONE
SLOPES SIEEPER THAN 3.1
7 DAYS
IF SLOPES ARE 10 FT OR LESS IN LENGTH
AND ARE ARE NOT S7EEPER THAN 2. 1,
14 DAYS ARE ALLOWD
SLOPES 3.1 OR FLAPER
14 DA YS
7 DAYS FOR SLOPES GREATR THAN
50 FTIN LENG7H
ALL 07HER AREAS W7H SLOPES
14 DA YS
NONE, EXCEPT FOR PERIMETR AND
FLA TIER THAN 4. 1
HQW ZONES
2 DENUDED AREAS MUST BE STABILIZED W7111N FIFTEEN (15) WORKING
DAYS OF CEASE OF ANY PHASE OF AC71WTY ALL SLOPES MUST BE
STABILIZED 141THIN TWENTY-ONE (21) CALENDAR DAYS OF CEASE OF
ANY PHASE OF AC71WTY. THIS INCLUDES SLOPES, SWALES, CHANNELS
AND STOCKPILES.
J. THIS PLAN IS TO BE U77LIZED AND REWEWED ONLY IN CONJUNC71ON
KITH THE WRIUEN NARRARVE, WHICH IS AN IN7EGRAL PART OF THIS
EROSION AND SEDIMENT CONTROL PLAN.
4. ALL FINISHED SLOPES SHALL BE J. 1 OR FLATTER.
5. NO WETLANDS EXIST 141THIN LIMITS OF DISTURBANCE.
6. SEE STABILIZA71ON GUIDELINES ON SHEET EC-.
REMOVE EX. PIPE
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ALLOWED IN PARKING LOT
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EX. LOT LINES
S TEEL PIPE ACROSS ROAD
COMPACIED FILL OR
CRA VEL, EXIENSION
OF FABRIC AND WRE
INTO THE IRENCH
BACKnLL
MINIMUM 8'
7HICK LAYER
OF GRAWL
81MINIMUM
V- TRENCH
FX7ER
FABRIC
ME - 0-2-al, 33M
mr-m.- m-
NOIE.
SEE NARRA 71 VE
FOR MORE DETAIL.
ISOMENIC WEW
EX7ENSION OF
FABRIC AND WRE
INTO THE IRENCH
COMPAC7ED
FILL
81MINIMUM
RUER
FABRIC
141MINIMUM 41MINIMUM
SECII SEC77
SEDWEN I ENCE SILT
NTS
COIR MA TTI
RIPA RIA N
W1 TH BUMPER�'
CLUB HOUSE ACCESS ROAD ---+-
STILLING BASIN
"CONSTRUCTION AHEAD ---
WARN�NG SIGN ON STREET
S7EEL POST
36* ABOVf
BELOW
24
EXISTING TERRAIN
FILTER BAG FOR DEWA7ERING
20.0' to 25.0'
DRAINAGE J
GE07EXTILE
N07ES
1 - PROWDE STABILIZED OUTLET.
2. WOOD PALLETS MAY BE USED IN LIEU OF STONE
3. AND GE07EXTILE AS DIRECTED. A SUFFICIENT NUMBER
4. OF PALLETS MUST BE PROWDED TO ELEVATE THE ENTIRE
5. FILTER BAG FOR DEWA7ERING ABOVE NATURAL GROUND.
SILT FENCE
8" OF NO. 5 OR 57 STONE
SPECIAL STILLING BASIN
NTS
CSD
ENGINEERING
tICENSE j C-2710
ENGINEERING
�AND PtANNING
COMMERCIAt / RESIDENTIA�
P.O. SOX 1250
WENDEtt, NC 27591
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PROJEC T NO.: 18- 0454
ISheet PD-6.0
Sheet No. —2 oF 2

HEC-RAS Plan: Channel River: Channel Reach: 1
Reach
River Sta
Profile
Q Total
Min Ch El
W.S. Elev
Vel Chnl
Shear Chan
Val Left
Shear LOB
Vel Right
Shear ROB
(cfs)
(ft)
(ft)
(ft1s)
(lb/sq ft)
(ft1s)
(lb/sq ft)
(ft1s)
(lb/sq ft)
1
522.82
2-YR
29.33
27500
27673
3.09
0.84
1
522.82
10-YR
56.37
275.00
277.19
3.90
1.18
1.11
0.31
1.11
0.31
1
522.82
25-YR
73.98
275.00
277.41
4.28
1.36
1.41
0.45
1.41
0.45
1
522.82
100-YR
103.72
275.00
277.73
4.80
1.62
1.75
0.62
1.75
0.62
1
500
2-YR
29.33
274.68
276.43
3.05
0.81
1
500
10-YR
56.37
274.68
276.89
3.83
1.14
1.11
0.31
1.11
0.31
1
500
25-YR
73.98
274.68
277.11
4.22
1.32
1.40
0.44
1.40
0.44
1
500
100-YR
103.72
27468
277.42
4.76
1.59
1.74
0.61
1.74
0.61
1
400
2-YR
29.33
27327
27494
3.29
0.95
1
1400
10-YR
1 56.37
273.27
275.391
4.14
1.36
1.101
0.32
1.101
0.32
1
400
25-YR
73.98
273.27
275.61
4.50
1.53
1.43
0.47
1.43
0.47
1
400
100-YR
103.72
273.27
275.94
4.99
1.77
1.79
0.66
1.79
0.66
1
300
2-YR
29.33
271.86
273.69
2.82
0.68
0.34
0.05
0.34
0.05
1
300
10-YR
56.37
271.86
274.17
3.53
0.94
1.10
0.28
1.10
0.28
1
300
25-YR
73.98
271.86
274.40
3.89
1.10
1.34
0.39
1.34
0.39
1
300
100-YR
103.72
27186
274.73
4.38
1.32
1.64
0.53
1.64
0.53
1
200
2-YR
29.33
27067
27231
3.38
1.01
1
200
10-YR
56.37
270.67
272.76
4.22
1.42
1.09
0.32
1.09
0.32
1
200
25-YR
73.98
270.67
272.98
4.62
1.62
1.43
0.48
1.43
0.49
1
200
100-YR
103.72
270.67
273.29
5.16
1.91
1.81
0.69
1.82
0.69
1
100
2-YR
29.33
269.05
270.77
3.12
0.85
1
100
1 O-YR
56.37
26905
271 23
3.93
1.21
1.11
0.31
1.11
0.32
1
100
25-YR
73.98
269.05
271.45
4.32
1.39
1.41
0.45
1.41
0.45
1
100
100-YR
103.72
26905
271.77
4.83
1.65
1.75
0.62
1.76
0.63
1
82.37
2-YR
29.33
268.80
270.52
3.12
0.85
1
82.37
10-YR
56.37
268.80
270.98
3.93
1.21
1.11
0.31
1.11
0.31
1
82.37
25-YR
73.98
268.80
27120
4.31
1.39
1.41
0.45
1.41
0.45
1
82.37
100-YR
103.72
268.80
271.52
4.83
1.64
1.76
0.63
1.76
0.63

Page 1 of 2
CHANNEL ANALYSIS WORKSHEET
Date: 12/22/2020 Computed: JFO Checked: HSR CSD Engineering
3 N. Main Street
Suite D
Project: Cleveland Bluffs Subdivsion (JC# 19-096-P) Wendell, NC 27591
919.624-0997
Q ................
Discharge (cfs)
A ............
Flow Area (sf)
Zreq ............
(Q x n)/(1.49 x Slope^0.5)
P ............
Wetted Perimeter (ft)
B ................
Base Width (ft)
R ............
Hydraulic Radius (ft)
Y ................
Normal Depth (ft)
V ............
Velocity (fps)
M1 ..............
Left Side Slope
Zav .........
A*R12/3
M2 ..............
Right Side Slope
T ............
Shear Stress (psf) 62.4 x Y x Slope
n ................ Manning's Roughness Coefficient (Reference 1; Table 3, Charts 5 thru 9)
Tp ............... Permissable Shear Stress (Reference 1; Table 2)
Reference 1: FHWA Hydraulic Engineering Circular No. 15, Publication No. FHWA-IP-87-7, 1988
Station: 0' TO 440'
Description: Channel Mitigation
Q = 29.3 cfs 2-Year Channel
Slope = 0.0143 ft/ft
n = 0.069 Class C Vegetation with coir matting
Zreq = 11.4 ft
B y M1 M2 A P R V Zav T Tp Remarks
3.0 1.5 3.0 3.0 11.3 12.5 0.90 2.4 10.5 1.34 4.00 Stable
Q = 29.3 cfs
Slope = 0.0143 ft/ft
n = 0.053 Class D Vegetation with coir matting
Zreq = 8.7 ft
B y M1 M2 A P R V Zav T Tp Remarks
3.0 1.50 3.0 3.0 11.3 12.5 0.90 3.1 10.5 1.34 4.00 Stable
Station: 0' TO 440'
Description: Channel Mitigation
Q = 56.4 cfs 10-Year Channel
Slope = 0.0143 ft/ft
n = 0.060 Class C Vegetation with coir matting
Zreq = 18.9 ft
B y M1 M2 A P R V Zav T Tp Remarks
3.0 2.0 3.0 3.0 18.0 15.6 1.15 3.3 19.8 1.78 4.00 Stable
Q = 56.40 cfs
Slope = 0.0143 ft/ft
n = 0.066 Class D Vegetation with coir matting
Zreq = 20.9 ft
B y M1 M2 A P R V Zav T Tp Remarks
3.0 1.0 3.0 3.0 5.6 9.0 0.62 2.0 4.0 0.85 4.00 Stable

Page 2 of 2
CHANNEL ANALYSIS WORKSHEET
Date: 12/22/2020 Computed: JFO Checked: HSR CSD Engineering
3 N. Main Street
Suite D
Project: Cleveland Bluffs Subdivsion (JC# 19-096-P) Wendell, NC 27591
919.624-0997
Q ................
Discharge (cfs)
A ............
Flow Area (sf)
Zreq ............
(Q x n)/(1.49 x Slope^0.5)
P ............
Wetted Perimeter (ft)
B ................
Base Width (ft)
R ............
Hydraulic Radius (ft)
Y ................
Normal Depth (ft)
V ............
Velocity (fps)
M1 ..............
Left Side Slope
Zav .........
A*R12/3
M2 ..............
Right Side Slope
T ............
Shear Stress (psf) 62.4 x Y x Slope
n ................ Manning's Roughness Coefficient (Reference 1; Table 3, Charts 5 thru 9)
Tp ............... Permissable Shear Stress (Reference 1; Table 2)
Reference 1: FHWA Hydraulic Engineering Circular No. 15, Publication No. FHWA-IP-87-7, 1988
Station: 0' TO 440'
Description: Channel Mitigation
Q =
103.7 cfs
100-Year Channel
Slope =
0.0143 ft/ft
n =
0.055
Class C Vegetation
with temporary matting
Zreq =
31.8 ft
B
y
M1
M2
A
P
R
V
Zav
T
Tp
Remarks
3.0
2.5
3.0
3.0
25.4
18.5
1.37
4.0
31.3
2.19
4.00
Stable
Q =
103.70 cfs
Slope =
0.0143 ft/ft
n =
0.045
Class D Vegetation
with temporary matting
Zreq =
26.5 ft
B
y
M1
M2
A
P
R
V
Zav
T
Tp
Remarks
3.0
2.3
3.0
3.0
22.4
17.4
1.29
4.6
26.6
2.03
4.00
Stable

Cleveland Bluff s Stream Restoration Plan
5EGi
Attachment 7
Pond Berm Removal
12

MUM-
2021 Aerial with Bermnl'-,-'
40i A
P
Google Earth
Clevela d Bluffs
W
looft