20141256 Ver 1_401 Application_20141214

December 1, 2014
North Carolina Department of Environmental and Natural Resources
NC DWR, 401 & Buffer Permitting Unit
512 North Salisbury Street
Raleigh, NC 27604
RE: Pre - Construction Notification (PCN) Application
Petition Project
Project Location: 12300/12304 Mabry Mill Street, Raleigh NC 27614
Dear NC DWR, 401 & Buffer Permitting Unit:
Enclosed are six copies of the completed "Pre- Construction Notification (PCN)
Application Form" including 11 x 17 inch plans. A $240.00 payment for the permit fee
was made via electronic transfer. I am submitting one copy of this application to the
United States Army Corps of Engineers.
Thank you for your assistance in processing this application. If you need additional
information, please contact me at (919) 996 -4028.
�Sincerely,
Robert Kirkpatrick
Project Manager
Enclosures
cc: Blair Hinkle, P.E.
Chris Stanley, P.E.
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Business Unit Invoice Number 112300 12304 Mabry Mill Court
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Office Use Only
Corps action ID no
DWQ project no
Form Version 1 4 January 2009 _
Page 1 of 10
PCN Form — Version 1 4 January 2009
Pre - Construction Notification (PCN) Form
A.
Applicant Information
1.
Processing
1a
Type(s) of approval sought from the Corps
X❑ Section 404 Permit ❑ Section 10 Permit
1 b Specify Nationwide Permit (NWP) number NW 13 or General Permit (GP) number
1c
Has the NWP or GP number been verified by the Corps?
❑ Yes ❑X No
Id
Type(s) of approval sought from the DWQ (check all that apply)
NX 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑X Riparian Buffer Authonzabon
1e
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ
401 Certification
N Yes ❑X No
For the record only for Corps Permit
❑ Yes ❑X No
1f
Is payment into a mitigation bank or in -lieu fee program proposed for
mitigation of impacts? If so, attach the acceptance letter from mitigation bank
or in -lieu fee program
❑ Yes ❑X No
1g
Is the project located in any of NC's twenty coastal counties If yes, answer 1h
below
N Yes NX No
1h
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes © No
2.
Project Information
2a
Name of project
12300 & 12304 Mabry Mill Street
2b
County
Wake
2c
Nearest municipality / town
Raleigh
2d
Subdivision name
Middleton Wakefield
2e
NCDOT only, T I P or state project no
N/A
3.
Owner Information
3a
Name(s) on Recorded Deed
Jarin & Mamun Shahner Edward T and Karen L Burke
3b
Deed Book and Page No
DB 13251 PG 1502 DB 09303 PG 2753
3c
Responsible Party (for LLC if
applicable)
3d
Street address
12300 Mabry Mill Street 12304 Mabry Mill Street
3e
City, state, zip
Raleigh, NC 27614 -9877 Raleigh, NC 27614 -9877
3f
Telephone no
3g
Fax no
Eno r
3h
Email address
Page 1 of 10
PCN Form — Version 1 4 January 2009

4.
Applicant Information (if different from owner)
4a
Applicant is
❑ Agent ❑X Other, specify City of Raleigh
Blair Hinkle PE
4b Name
4c
Buapplicable) sme a
(
City of Raleigh Public Works Department
4d
Street address
222 West Hargett Street, PO Box 590
4e
City, state, zip
Raleigh, NC 27602
4f
Telephone no
919 - 996 -4011
4g
Fax no
919 - 966 -7638
4h
Email address
blair hinkle @raleighnc gov
S.
Agent/Consultant Information (if applicable)
5a
Name
Becky L Ward
5b
Business name
(if applicable)
9 9 Ward Consulting Engineers, P C
5c
Street address
4805 Green Road, Suite 100
5d
City, state, zip
Raleigh, NC 27616
5e
Telephone no
919- 870 -0526
5f
Fax no
919 - 870 -5359
5g
Email address
bward @wce -corp corn
Page 2 of 10

o.
rroject intormation and Prior Project History
I.
Property Identification
1a
Property identification no (tax PIN or parcel ID) 1820801156, 1820802216
1b
Site coordinates (in decimal degrees) Latitude 35 9477 Longitude -78 5671
lc
Property size 1 05 acres
2.
Surface Waters
2a
Name of nearest body of water to proposed project UT to Richland Creek
2b
Water Quality Classification of nearest receiving water WS -IV, NSW
2c
River basin ' Neuse
3.
Project Description
3a
Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application
Please see documentation attachment
3b
List the total estimated acreage of all existing wetlands on the property 0
3c
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property 260
3d
Explain the purpose of the proposed project
Please see documentation attachment
3e
Describe the overall project in detail, including the type of equipment to be used
Please see documentation attachment
4.
Jurisdictional Determinations
4a
Have jurisdictional wetland or stream determinations by the
El
Corps or State been requested or obtained for this property /
Yes El No X❑ Unknown
project (includin2 all prior phases) in the past?
Comments
4b
If the Corps made the jurisdictional determination, what type
of determination was made?
❑ Preliminary ❑ Final
4c
If yes, who delineated the junsdictional areas?
Agency /Consultant Company
Name (if known)
Other
4d
If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation
5.
Project History
5a
Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑Yes ❑ No ❑X Unknown
5b
If yes, explain in detail according to "help file" instructions
6.
Future Project Plans
6a
Is this a phased project?
❑ Yes X❑ No
6b
If yes, explain
Page 3 of 10
PCN Form — Version 1 4 January 2009

%.. vroposea Impacts Inventory
1. Impacts Summary
1 a Which sections were completed below for your project (check all that apply)
❑ Wetlands ❑X Streams —tributaries X❑ Buffers ❑ Open Waters
P ❑ Pond Construction
2. Wetland Impacts
If there are wetland
2a
Wetland impact
number
Permanent (P) or
Tem ora
impacts proposed on the site, then complete this question for each wetland area impacted
2b 2c 2d 2e 2f
Type of impact Type of wetland Forested Type of jurisdiction Area of
Corps (404,10) or impact
DWQ (401, other) (acres)
W1 -
Choose one
Choose one
Yes/No
-
W2 -
Choose one
Choose one
Yes/No
-
W3 -
Choose one
Choose one
Yes /No
-
W4 -
Choose one
Choose one
Yes /No
-
W5 -
Choose one
Choose one
Yes /No
-
W6 -
Choose one
Choose one
Yes/No
-
2h Comments 2g Total Wetland Impacts:
N/A
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted
3a
Stream impact
number
Permanent (P) or
Temporary (T}
3b
Type of impact
3c
Stream name
3d
Perennial (PER) or
intermittent (INT)?
3e
Type of
jurisdiction
3f
Average
stream
width
(feet)
3g
Impact
length
(linear
feet)
S1 P
Stabilization
UT to Richland Creek
INT
Corps
7 95
60
S2 P
Stabilization
UT to Richland Creek
INT
Corps
8
30
S3 -
Choose one
34 -
Choose one
S5 -
Choose one
S6 -
Choose one
3h Total stream and tributary impacts
90
31 Comments
S1- Stream stabilization measures will consist of a constructed riffle, rock toe, vegetated soil lifts, and re- vegetation
S2- Stabilization measures wdl consist of bank reshaping and re- vegetation
Page 4 of 10
PCN Form — Version 14 January 2009

4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U S then Individuall list all 0--- water im acts below
4a 4b 4c
Open water Name of waterbody 4d 4e
impact number (if applicable)
Permanent (P) or Type of Impact Waterbody Area of impact (acres)
Tern ora type
01 -
02 -
Choose one Choose
03 -
Choose one Choose
04 -
Choose one Choose
Choose one Choose
4g Comments 4f Total open water impacts
5. Pond or Lake Construction
If pon d 7111-1, l tion ro osell then com lete the chart below
5b 5c 5d
Pond roposed use or Wetland Im acts acres 5e
urpose of pond p ( ) Stream Impacts (feet) Upland
(acres)
P1 Choose one Flooded Filled Excavated Flooded Filled Excavated
P2 Choose one
5f Total:
5g Comments- N/A
5h Is a dam high hazard permit required? 0 Yes [0] No If yes, permit ID no
51 Expected pond surface area (acres)
5j Size of pond watershed (acres)
5k Method of construction
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below If yes, then individually list all buffer Impacts
below If a iy impacts require mite anon, then you MUST fill out Section D of this form
6a. Project is in which protected basin? QX Neuse 0 Tar - Pamlico � Catawba �] Randleman ❑ Other
6b 6c 6d 6e 6f
Buffer Impact Reason for impact Stream name 6g
number— Buffer Zone 1 Zone 2
Permanent (P) or mitigation impact impact
Temporary required? (square (square
B1
T Construction access UT to Richland
1eei teet
62
P grading & UT to Richland
No
No
Yes /No
1,805 780
B3
-
1,280 0
Yes/No
B4
-
Yes /No
B5
-
Yes/No
B6
-
Yes/No
61 Comments B1 - Impacts will be from construction access
6h Total Buffer Impacts:
3,085 780
and grading the area is
62 - Impacts will be grading and re- vegetation with
all currently maintained l
awn
woody plants
Page 5 of 10

D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project
The purpose of the project is to address stream active bank erosion The project limits the impacts by confining the repairs to the area that is actively
eroding and providing vertical stability of the channel through the installation of the constructed riffle to prevent a head cut from proceeding upstream
The buffer area is currently lawn additonal woody vegetation will be established on the banks from the repair area to the culvert downstream
lb Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques
Equipment will be kept above the stream and construction will only occur in the limits of disturbance Seeding, matting, and installation of woody
vegetation will occur in all disturbed areas shown on the planting plan for buffer reestablishment and long term stabilization
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a Does the project require Compensatory Mitigation for
impacts to Waters of the U S or Waters of the State?
❑ Yes ❑X No
2b If yes, mitigation is required by (check all that apply)
❑ DWQ ❑ Corps
2c If yes, which mitigation option will be used for this
project?
❑ Mitigation bank
❑ Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a Name of Mitigation Bank
3b Credits Purchased (attach receipt and letter)
Type Choose one
Type Choose one
Type Choose one
Quantity
Quantity
Quantity
3c Comments
4. Complete if Making a Payment to In -lieu Fee Program
4a Approval letter from in -lieu fee program is attached
❑ Yes
4b Stream mitigation requested
linear feet
4c If using stream mitigation, stream temperature
Choose one
4d Buffer mitigation requested (DWQ only)
square feet
4e Riparian wetland mitigation requested
acres
4f Non - npanan wetland mitigation requested
acres
4g Coastal (tidal) wetland mitigation requested
acres
4h Comments
5. Complete if Using a Permittee Responsible Mitigation Plan
5a If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan
Page 6 of 10
PCN Form — Version 1 4 January 2009

6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation?
❑ Yes ❑X No
6b If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation Calculate the
amount of mitigation required
6c
6d
6e
Zone
Reason for impact
Total impact
Multiplier
Required mitigation
(square feet)
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1 5
6f Total buffer mitigation required:
6g If buffer mitigation is required, discuss what type of mitigation is proposed (e g , payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund)
6h Comments
Page 7 of 10

E.
Stormwater Management and Diffuse Flow Plan (required by DWQ)
1.
Diffuse Flow Plan
la
Does the project include or is it adjacent to protected riparian buffers identified
within one of the NC Riparian Buffer Protection Rules?
❑ Yes No
lb
If yes, then is a diffuse flow plan included? If no, explain why
❑ Yes ❑ No
2.
Stormwater Management Plan
2a
What is the overall percent imperviousness of this project?
0
2b
Does this project require a Stormwater Management Plan?
❑ Yes No
2c If this project DOES NOT require a Stormwater Management Plan, explain why
No new impervious areas will be added to the project area The project involves only bank stabilization
2d
If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan
2e
Who will be responsible for the review of the Stormwater Management Plan?
N /,4
3.
Certified Local Government Stormwater Review
3a
In which local government's jurisdiction is this ro ect?
City of Raleigh
3b
Which of the following locally - implemented stormwater management programs
apply (check all that apply)
0 Phase II
❑ NSW
❑ USMP
❑ Water Supply Watershed
❑ Other
3c
Has the approved Stormwater Management Plan with proof of approval been
attached?
E] Yes ❑X No
4. DWQ Stormwater Program Review
4a
Which of the following state - implemented stormwater management programs apply
(check all that apply)
❑Coastal counties
❑HQW
❑ORW
❑Session Law 2006 -246
❑Other
4b
Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑X No
S. DWQ 401 Unit Stormwater Review
5a
Does the Stormwater Management Plan meet the appropriate requirements?
Yes ❑ No
5b
Have all of the 401 Unit submittal requirements been met?
❑ Yes ❑ No
Page 8 of 10
PCN Form — Version 14 January 2009

r.
supplementary Information
1.
Environmental Documentation (DWQ Requirement)
1a
Does the project involve an expenditure of public (federal /state /local) funds or the
use of public (federal /state) lands
❑X Yes ❑ No
lb
If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
(North Carolina) Environmental Policy Act (NEPA /SEPA)?
El Yes ❑X No
1c
If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
letter)
❑ Yes ❑ No
Comments
2.
Violations (DWQ Requirement)
2a
Is the site in violation of DWQ Wetland Rules (15A NCAC 2H 0500), Isolated
Wetland Rules (15A NCAC 2H 1300), DWQ Surface Water or Wetland Standards,
❑Yes X❑ No
or Riparian Buffer Rules (15A NCAC 2B 0200)'?
2b
Is this an after - the -fact permit applications
❑Yes ❑X No
2c
If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s)
3.
Cumulative Impacts (DWQ Requirement)
3a
Will this project (based on past and reasonably anticipated future impacts) result in
additional development, which could impact nearby downstream water quality?
1:1 Yes X❑ No
3b
If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy If you answered "no," provide a short narrative description
4.
Sewage Disposal (DWQ Requirement)
4a Clearly detail the ultimate treatment methods and disposition (non - discharge or discharge) of wastewater generated from
N/A
the proposed project, or available capacity of the subject facility
Page 9 of 10
PCN Form — Version 14 January 2009

5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
habitat?
❑ Yes No
5b Have you checked with the USFWS concerning Endangered Species Act
impacts? ❑ Yes ® No
5c If yes, indicate the USFWS Field Office you have contacted _
5d What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Please see documentation attachment
6. Essential Fish Habitat (Corps Requirement)
6a Will this project occur in or near an area designated as essential fish habitat? ❑ Yes X❑ No
6b What data sources did you use to determine whether your site would impact Essential Fish Habitat?
The project is located in an urban stream
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a Will this project occur In or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
status (e g , National Historic Trust designation or properties significant in ❑Yes ®No
North Carolina history and archaeology)?
7b What data sources did you use to determine whether your site would Impact historic or archeological resources?
The NC Historical Preservation Office website (www hpo dcr state nc us) was searched and no sites were listed for this property In addition, no
architectural structures or archaeological artifacts were noted during preliminary surveys at the site
B.-Flood Zone Designation (Corps Requirement)
Ba Will this project occur in a FEMA - designated 100 -year floodplain? ❑Yes
8b If yes, explain how project meets FEMA requirements
8c What source(s) did you use to make the floodplain determination?
(fns nc gov)
Blair Hinkle, PE
Applicant/Agent's Printed Name
�t
Applicatfit/Agent's Signature
(Agent's signature is valid only if an authorization
letter from the annhcant m nmit,4 ,4 i
Page 10 of 10
X❑ No
Date

Documentation for Pre - Construction Notification (PCN) Form
B Project Information and Prior Project History
3a. Proiect Description
The project is located in a well - established residential area of Raleigh, NC and will involve two single
family subdivision lots located at 12300 and 12304 Mabry Mill Street. The 25.6 acre watershed for this
project is made up of fully developed 0.5 acre residential lots. An existing storm drainage system
collecting water from the watershed outfalls to 186 linear feet of stream in the backyard of 12300 and
12304 Mabry Mill Street. A 15 inch RCP drains the watershed into the stream. The final section of the
RCP has fallen off of the end of the line and into the stream that has eroded back causing the pipe to
separate. The east bank between the existing 15 inch RCP and the existing riprap has eroded. An existing
head cut is located approximately 33 feet upstream of the existing 15 inch outfall.
3d. Explain the purpose of the proiect
The propert y owners have requested the City of Raleigh's assistance in repairing the stream in the
backyard of 12300 and 12304 Mabry Mill Street. The project will incorporate stream bank stabilization
from the pipe outlet to 115 feet downstream and pipe system upgrades to lower the pipe outlet into the
stream toe.
3e. Describe the overall proiect in detail including the type of equipment to be used
The stream has incised to a 3.5 foot head cut that has established in the channel. The project will consist
of re- grading the stream banks to a stable slope and placement of riprap to bankfull elevation. The deep
incision at the head cut will be raised with soil fill and vertical control will be established with
constructed riffle to prevent future erosion upstream. A pool will be constructed at the pipe outlet in
the bend. Additional riffle will be constructed downstream of the pool and tied in to the existing stream
bed. Soil lifts will be used to reconstruct the stream bank on the west side and provide proper stream
function and geometry. The stream banks will be seeded, matted, and planted with woody vegetation
for long term stabilization. Additional vegetation will be installed below the stream bank repair area to
the existing culvert on both banks.
The equipment to the used in the project is earth moving equipment and various other support
apparatuses. Heavy equipment may include hydraulic excavator, track hoe, compactors, bulldozers,
skidsteer loaders, and dump trucks to load and unload materials The construction equipment will enter
off of Mabry Mill Street and will perform all construction within a defined limits of disturbance. No
construction equipment will cross the stream. All work will be performed from the west bank.
F. Supplementary Information
5d. What data sources did you use to determine whether your site would impact Endangered Species or
Designated Critical Habitat?
The site is an existing urban residential area that has been previously impacted by development. Habitat
is not present for Wake County listed vertebrate and invertebrate endangered species. The site is open
with little vegetation present within the work area and is currently being mowed. There should not be
any associated T/E issues.

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PHOTO LOG
12300 & 12304 MABRY MILL STREET
Photo 1: Looking downstream of LIT to Richland Creek
Photo 2: 1S inch RCP outlet with detached section
Photo 3: FES Culvert at STA 1 +86

Photo 4: STA 0 +00 of UT to Richland Creek
Photo S: Looking at UT to Richland Creek from 12304 Mabry Mill Street

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• ia.
1. PLANTING ZONE A STREAM BANK: TO BE PLANTED WITH A
COMBINATION OF THE FOLLOWING SMALL TREES /SHRUBS:
(ROOTED PLANT PLUGS- 12 -18" IN HEIGHT)
250 PLANTS (3' ON CENTER SPACING) STREAMBANK
110 PLANTS (1' ON CENTER OF VEGETATED GEOGRIDS)
TOTAL PLANTS =360
CEPHALANTHUS OCCIDENTALIS — BUTTONBUSH (70 PLANTS)
CORNUS AMOMUM —SILKY DOGWOOD (70 PLANTS)
ASIMINA TRILOBA — COMMON PAWPAW (70 PLANTS)
AMELANCHER ARBOREA — SERVICEBERRY (70 PLANTS)
ALNUS SERRULATA — TAG ALDER (80 PLANTS)
2. CONTRACTOR TO REPLANT DISTURBED AREA IN ZONE B TO
MATCH EXISTING GRASS ON SITE (NO TREES OR SHRUBS
REQUIRED FOR ZONE B).
3. PLANTING STOCK TO BE GROWN BY NURSERIES WITHIN THE
SAME PHYSIOGRAPHIC REGION(PIEDMONT) AND WITHIN 200
MILES OF THE PROJECT SITE.
4. FERTILIZER RECOMMENDATIONS:
LIME %j TON /AC.
PHOSPHATE 20 -40 LBS /AC.
POTASH 50 -70 LBS /AC.
WATERING REQUIREMENTS ONCE/WEEK IF NO RAIN
5. USE ONLY SHRUBS IN SANITARY SEWER EASEMENT
(NO TREES)
Permanent Riparian Seed Mix Zone A & B
Application Rate = 35lbs per Acre Total Ibs = 4.9lbs
Scientific Name
Common Name
Percent
Elyrrius hystnx
Bottlebrush grass
15
Parncum anceps
Beaked panic grass
15
Elymus wrgmrcus
Virginia wild rye
10
Brdens frundosa
Deal's beggarfick
10
Coreopsrs lanceolata
Lanceleaf tickseed
10
Dichanthelrum candestrnum
Deertongue
10
Andropogon gerardn
Big bluestem
5
Juncus effusus
Common rush
5
Vemonra noveboracensis
Ironweed
5
Schrzachynum scopanum
Little bluestem
5
Sorgastrum nutans
Indian grass
5
Tnpsicum dactyloides
Gamma grass
5
Temporary Seed Mix to be Sown Simultaneously With the
Permanent Seed in Zone A & B
Grass Type Time of Year to Plant Planting Rate (lbs/acre)
Rye Grain August 15 - May 1 15
Brown -top millet I May 1 -August 15 15
ERNST NORTH CAROLINA RIPARIAN SEED MIX
MAY BE SUBSTITUTED FOR ABOVE SEED MIX.
MR, 12300 & 12304 MABRY MILL STREET
y
I► J
7 1i •1 PLANTING NOTES . SPECIFICATIONS
CITY OF RALEIGH,NORTH CAROLINA
,DATE NOVEMBER 5.2014
� WARD CONSULTING ENGINEERS, PC
4805 Green Road, Suite 100 919 870 -0526
Raleigh, NC 27616 FAX [phone]

MEASURES PLAN SHEET 3 --"
SEE PLANTING
PLAN SHEET 4
FABRIC ❑N BANK
I, —TOP OF LIFT = 496,0'
r11\—TOP OF LIFT EL,= 495.0'
OF ROCK BASE EL, =494,
cnNCTRI If TCT DTCri r
TYPICAL CONSTRUCTED RIFFLE AND SOIL LIFTS SECTION VIEW
CAS VIEWED LOOKING DOWNSTREAM)
❑ ESQ NTS
1,, CONSTRUCT CHANNEL RIFFLE
ROCK AND ROCK BASE FOR SOIL
LIFTS PER THE LONGITUDINAL PR ❑FILE.
2, RIFFLE AND ROCK BASE TO BE
CONSTRUCTED OF 70% CLASS II, 20% CLASS A, AND
10% #57 STONE MIX, SAND OR SOIL TO BE ADDED
TO MIX TO SEAL VOIDS WITH ROCK.
12300 MABRY MILL
SOIL LIFT DETAIL
CITY OF RALEIGH,NORTH CAROLINA
SEPT 17, 2012
r WARD CONSULTING ENGINEERS, PC
FIRM LICENSE NO: C -2619
4805 Green Road, Suite 100 919 870 -0526
> Raleigh, NC 27616 FAX [phone]

TOP OF EXCAVATED FLOODPWN
BENCH AT BANKFULL ELEVATION
(LIMITS SHOWN ON PLANS)
1VL-
2H
24'
' �l� mmunalfA�
Mal MA
FABRIC 6' (MIN.) IN MATTED TERRACE SLOPE
WIDTH AT TOP OF BANK (LIMITS SHOWN ON PLANS)
—END TOE PROTECTION STREAM --END TOE PROTECTION
\ BANK (LIMIT SHOWN ON PLANS
l AT BANKFULL ELEVATION)
1V1—
2H
24'
12300 MABRY MILL
ROCK TOE DETAIL
CITY OF RALEIGH,NORTH CAROLINA
DATE SEPT 17, 2012
WARD CONSULTING ENGINEERS, PC
FIRM LICENSE N0: C -2619
4805 Green Road, Suite 100 S919 870 -0526
Raleigh, NC 27616 FAX [phone]

PLANTING DETAILS
SEEDLING /
HEALING IN
�W oixtedanheQUn9 -In site In a shady, well
2. taunts flat �tton trench
ldeep nn� provide drnhro9e.
3 BndcflU the L tr7h wlth ' weU
� ne Vw ftI ace In er n
nt a s(U angle
4.Raccee a shgle la er of olantt�sn
tRe root�coUnr�s�t gndround§o level.
5SQw ce ao ela= r°foots l�
a s19 angle.
ns �hecessnt Y orof finer arts ro owdust
Y
LINER
PLANTING NOTESI
PJANTING
t 1r e�ptgi

NOTES
1 • EROSION CONTROL MATTING TO BE
INSTALLED IN EXCAVATED TRENCH AS
SHOWN.
2• CONTRACTOR TO PACK VOIDS WITH
STONE MIX THEN ADD A FINE LAYER OF
SOIL TO FILL SMALLER VOIDS AS RIFFLE
IS CONSTRUCTED FROM BOTTOM UP
OR MIX ROCK WITH SOIL PRIOR To
INSTALLATION.
3. THE RIFFLE TAIL LENGTHS 'C' ARE 5'
MINIMUM.
4. PLACE STONE MIX AS SHOWN IN CHART
BELOW.
5' CONTRACTOR TO UTILIZE EXISTING RIFFLE
STONE IN OLD CHANNEL To SEED NEW
RIFFLES WHERE POSSIBLE
TAPER ROCK FROM BOTTOM OF TRENCH- -
TO DEPTH B AT HEAD AND END OF RIFFLE
PERCETIT OF MIX
fSMNE MIX 1� 3px 5OX $ T RENCH
DEPTH
1 MIX A CLASS I SOIL 18'
D MD( B CLASS R SOIL 24' 0 MD( 2'-' CLASS 0 SOD 1 12'
STREAM FLOW
A CHANNEL
RIFF OPE THALIMEG
SLOPE 3H:1
SLOPE 3K- IV
CLASS II LONGITUDI AI VIEW
RIFFLE
STONE
A- STREAM WIDTH
AVG 4!* 4
CLASS A - R ' N EROSIO CONTROL RIP RAP 2' -5' TRENCH
CUSS B -RIP RAP 5' -12' AVG s' DEPTH MATTING PLACE
CLASS 1 - RIP RAP 5' -17" AVG 10' INTO TRENCH
CUSS 0 - RIP RAP V -23" AVG 14' %ZEE,
CONSTRUCTED RIFFLE E1N a —A' STONE MIX
SCALE NOT TO SCALE
1 04
MwAkw
12300 MABRY MILL
RIFFLE DETAIL
CITY OF RALEIGH,NORTH CAROLINA
TE SEPT 17, 2012
r WARD CONSULTING ENGINEERS, PC
FIRM LICENSE NO: C -2619
4805 Green Road, Suite 100 919 870 -0526
> Raleigh, NC 27616 FAX [phone]

4P
LONGITUDINAL ANCHOR
TRENCH
9T—A—K E AT 3' -5'�
INTERVALS
r
F�Ol�l
TERMINAL SLOPE AND CHANNEL
ANCHOR TRENCH
1
'CHECK SLOT AT 25'
'INTERVALS (MIN)
ISOMETRIC k
*.v
WOODEN
STAKES
INITIAL CHANNEL ANCHOR TRENCH INTERMITTENT CHECK SLOT
NOIF�;
I. CHECK SLOTS TO BE CONSTRUCTED AT
25' INTERVALS
2. ALL MATTING TO BE SECURED WTH
WOODEN STAKES ACCORDING TO THE
SPECIFICATIONS AT 5' INTERVALS
3. FABRIC OVERLAP WHEN 2 ROWS OF
MATERIAL ARE USED SHALL BE PLACED
WITH THE UPPER ROW OF MATERIAL
PLACED OVER THE LOWER ROW OF
MATERIAL
4. TRENCH MATTING AT TOP AND BOTTOM
OF MAT AS SHOWN IN DETAIL
5. OVERLAP FABRIC IN DIRECTION OF FLOW
WITH MATTING UPSTREAM ON TOP OF
DOWNSTREAM MAT.
S. MATTING WILL BE INSTALLED ACCORDING
TO THE SPECIFICATIONS
12300 MABRY MILL
>r11►�jst��1� w EROSION CONTROL
CITY OF RALEIGHINORTH CAROLINA
aATE SEPT 17, 2012
WARD CONSULTING ENGINEERS, PC
FIRM LICENSE N0: C -2619
4805 Green Road, Suite 100 919 870 -0526
Raleigh, NC 27616 FAX (919; 870 -5359

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Erosion Control Matting / Coconut Fiber (Coir) Blanket (C -700)
Description
The coconut fiber channel lining shall be a machine- produced 100% biodegradable mat.
The blanket shall be of consistent thickness with the coconut fiber evenly distributed over
the entire area of the mat. Coconut Fiber Blankets will only be used in e locations specified
by the Engineer. Locations will be on all disturbed streambanks prior to turning the
streamflow into the newly constructed channel. Other problem areas may also require the
placement of coconut fiber blankets.
Materials
_Coconut fiber m
Matrix
Weight
Tensile Strength
U en Area
Thickness
ing shall be provided to meet the
Recommended Flow
Size
"C" Factor
below.
100% Coconut Fiber
20 oz/SY (678 gm/m2)
1348 x 6261b/ft minimum (1650.5 x 766.5
34% x 38%
50%
0.30 inches minimum (7.6 mm'
6503) x 29590
11 feet/second ( 3.35 m/s)
6.6 x 164 feet (120 SY) or (100
0.002
Stakes will be wooden stakes 12 in. (300 mm) in length with a notch cut 1 in. (25 mm)
from the top. These stakes shall be used to stake the matting along the slopes. Wooden 3
ft, stakes spaced approximately 4 ft. apart shall be used to secure the matting at the toe of
the slope. The toe stakes shall have a minimum 1 -inch by I -inch cross - section and shall
be designed so that the matting can not slide past the exposed end of the stake.
Construction Methods:
Provide a smooth soil surface free from stones, clods, or debris that will prevent the
contact of the matting with the soil. Place the matting immediately upon final grading.
Take care to preserve the required line, grade, and cross`section of the area covered. All
cut slopes shall be stabilized at the end of each working day with erosion control matting.
Apply fertilizer, seed, lime, and straw mulching prior to installing the matting.
Prepare the soil beneath the matting with topsoil if required, seed, fertilizer, and cover
with straw mulch. Unroll the matting and apply without stretching such that it will lie
smoothly but loosely on the soil surface. Bury the top slope end of each piece of matting
in a narrow trench at least 6 inches (150 mm) deep and tamp firmly. Where one roll of
matting ends and a second roll begins, overlap the end of the upper roll over the buried
end of the second roll so there is a 6 inches (150 mm) overlap. Construct check trenches
at least 12 inches (0.3 m) deep every 50 feet (16 m) longitudinally along the edges of the
matting or as directed by the Project Engineer. Fold over and bury matting to the full

depth of the trench, close and tamp firmly. Overlap matting at least 6 inches (150 mm)
where 2 or more widths of matting are installed side by side.
Place stakes across the matting at ends, junctions, and check trenches approximately 1
foot (90.3 m) apart with notch facing upslope. Place stakes along the outer edges and
down the center of each strip of matting 3 feet (1 meter) apart. Place stakes along all
lapped edges 1 foot (0.3 m) apart. Refer to details in the plan sheets.
The Engineer may require adjustments in the trenching or staking requirements to fit
individual site conditions.
_Basis of Payment
The quantity of "Erosion Control Matting /Coir Matting" measured as provided above
will be paid for at the contract unit price per square yard for "Erosion Control
Matting/Coconut Fiber (Coir) Blanket" and shall include all work and materials required
in this section. Payment for staples, stakes, and twine will be included in the contract unit
price for "Erosion Control Matting ".
Payment will be made under:
Erosion control matting ..........

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EXHIBIT A
WEIGHTED RATIONAL RUNOFF COEFFICIENT CALCULATIONS
Project Mabry Mill
Date 9/14/2012
Prepared by JPE & JCD
Storm Event Return Period (Year) 10
Land Use Area Bre
Single Fe
Total Impervious Commercial dwelling,
:a Drainage Rational Runoff Q
ration Area (AC) 0.9 O g5 r---
CI -2 008
0 08 L
CI -3 Oil 0 11
CI-4 229 2 2(
1kdown (A(;)
mily 4
lac Lawn Woods
lefficents C
Weighted
Weighted
0.36 0.2
C
IC x DA
090
007
090
010
060
137
©Reference Table of Rational Coefficients Elements of Urban Stormwater Design, H Rooney Malcom, P E
Data changed specific to project
Ward Consulting Engineers, P C 1 of 1

EXHIBIT B
STORM DRAINAGE DESIGN DISCHARGE CALCULATIONS
Project Mabry Mill
Location Stream Restoration
Existing or Proposed Existing
Date 14- Sep -12
Prepared by JPE & JCD
Storm Event Return Period (Year) 10
Location Weighted Pipe Pipe
From DA (DA" C) Diameter Area
Point To Point Acres (in) (sf
CI-4 CI -3 137 15 123
CI -3 CI -2 147 15 123
CI -2 EP -1 154 15 123
Pipe
Length
ft)
32
Time of Concentration
Intensity
(in /hr)
720
Design
Discharge
Qd (cfs)
986
Inlet
Time
500
Flow
Time
-
Design
Time
500
23
-
007
507
1 7-10
10 55
150
-
045
552 1
7 05
10 86
Ward Consulting Engineers, P C 1 of 1

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