20141203 Ver 1_401 Application_20141114

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November 14, 2014
North Carolina Department of Environmental and Natural Resources
NC DWR, 401 & Buffer Permitting Unit
512 North Salisbury Street
Raleigh, NC 27604
20141203
RE: Pre - Construction Notification (PCN) Application
Project: To alleviate structural flooding of dwelling (6215 Chapel Hill Road)
Project Location: 6213 & 6215 Chapel Hill Road; Raleigh, NC 27607
Dear NC DWR, 401 & Buffer Permitting Unit:
Enclosed are five copies of the completed "Pre- Construction Notification (PCN)
Application Form" with plans for the referenced project. In addition, I'll have the amount
of $240.00 electronically transferred to NC DWR for the permit fee. 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.
S' ely,
Robert Kirkpatrick
Project Manager
Enclosures
cc: Blair Hinkle, P.E.
Chris Stanley, P.E.
OFFICES' 222 WEST HARGETT STREET • POST OFFICE BOX 590 • RALEIGH. NORTH CAROLINA 27602

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20+17-05
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.4 January 2009
Page 1 of 10
PCN Form — Version 1
1U
NOV 1 7 1014
-�
DENR - WA7ER RESOURCES
401 8 BUFFER P MITTINO
January 2009
Pre - Construction Notification (PCN) Form
A.
Applicant Information
1.
Processing
1 a.
Type(s) of approval sought from the Corps:
X❑ Section 404 Permit ❑ Section 10 Permit
1 b.
Specify Nationwide Permit (NWP) number: NW 13 & 3 or General Permit (GP) number:
1c.
Has the NWP or GP number been verified by the Corps?
❑ Yes ❑X No
1d.
Type(s) of approval sought from the DWQ (check all that apply):
❑X 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑X Riparian Buffer Authorization
1e.
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ
401 Certification:
❑ 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 No
1g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1h
below.
❑ Yes ❑X No
1 h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes ❑X No
2.
Project Information
2a.
Name of project:
6213 &6215 Chapel Hill Road
2b.
County:
Wake
2c.
Nearest municipality / town:
Raleigh
2d.
Subdivision name:
N/A
2e.
NCDOT only, T.I.P. or state project no:
3.
Owner Information
3a.
Name(s) on Recorded Deed:
Gregory Covington JH & Ruth Hooker Sherrel C. Leach
3b.
Deed Book and Page No.
DB 02927 PG 0882 DB 04369 PG0252 DB 08376 PG 0467
3c.
Responsible Party (for LLC if
applicable):
3d.
Street address:
6215 Chapel Hill Road 6213 Chapel Hill Road 6239 Chapel Hill Road
3e.
City, state, zip:
Raleigh, NC 27607 Raleigh NC 27607 Raleigh NC 27607
3f.
Telephone no.:
3g.
Fax no.:
3h.
Email address:
' g
Page 1 of 10
PCN Form — Version 1
1U
NOV 1 7 1014
-�
DENR - WA7ER RESOURCES
401 8 BUFFER P MITTINO
January 2009

4.
Applicant Information,(If,different from owner)
4a
Applicant is
❑ Agent ® Other, specify City of'Raleigh
4b
Name
Carl R Dawson
4c
Business name
(if applicable)
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- 966 -3030
4g
Fax no
919- 966 -7638
4h
Email address
Carl dawson@raleidhnc gov
5.
Agent/Consultant Information (if applicable)
5a
Name
Becky L, Ward
5b
Business name
(if applicable)
Ward Consulting Engineers, P C
5c
Street address
48b5 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 com
Page 2 of 10

B.
Project Information and Prior Project History
1.
Property Identification
1a
Property identification no (tax PIN or parcel ID)
0784020174000, 0784020288, 0774929340
1b
Site'coordinates (in decimal degrees) I
Latitude 35 7888
Longitude -78 7301
is
Property size
1 27 acres
2.
Surface Waters
2a
Name of nearest body of water'to proposed project
'Richland Creek
2b, Water'Quality, Classification of nearest receiving water
C, NSW
2c
River basin
Neuse
3.
Project Description
3a Describe the existing conditions on the site,and the general,land use in the vicinityof 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 140
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
Corps or,State been, requested or obtained for this property]
ro ect. includin ,all nor phases) in the past?
El Yes El No ❑ Unknown,
Comments
4b
If fhe,Corps made the jurisdictional determination, what type
of determination was made?
❑ Preliminary ❑ Final
4c
If yes, who delineated the jurisdictional areas*
Name (if known)
Agency /,Consultant Company
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),m 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 projectl
❑ Yes ® No
6b
If yes, explain
Page 3 of 10
PC Form — Version 1 4,January 2609

C. Proposed Impacts Inventory
1. Impacts Summary
la Which sections were completed below for your project,(check all that apply)
❑ Wetlands ® Streams — tributaries ❑X Buffers ❑ Open Waters ❑ Pond Construction
2. Wetland Impacts
If,there are wetland Impacts proposed on the site, then complete this question for each wetland'area impacted
2a
2b
2c
2d
2e.
2f
Wetland Impact
Type of`Impact
Type of wetland
Forested
Type of'junsdictlon
Area of
number
Corps (404,10) or
Impact
,Permanent (P), or
DWQ (401, other)
(acres)
Temporary
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,
-
2g Total'Wetland Impacts:
2h Comments_ :
N/A
3. Strearftlmpacts
If there are,perennlal or'Intermlttent stream Impacts (Including temporary Impacts) proposed on the site, then complete this
question for all stream sites impacted
3a
3b
3c _
3d
3e
3f
3g
Stream Impact
Type of Impact
Stream name
Perennial (PER), or
Type of
Average
Impact
number
Intermittent (INT)?
jurisdiction
stream
length
Permanent (P) or
width
(linear
Temporary,(T)
(feet)
feet)
S1 P
Stabilization
UT to Richland Creek
INT
Corps
12
17
S2 P
Stabilization
UT to Richland Creek
INT
Corps
12
10
S3 T
Stabilization
UT to'Richland Creek
INT
Corps
12
�58
S4 -
Choose one
-
-
S5 -
Choose one
_
-
S6 -
Choose one
-
-
3h Total, stream and tributary impacts
85
31 Comments -
S1 impacts include np rap stabilization and bank regrading/replanting upstream of the culvert S2 impacts include rip rap and bank regrading/replanting
downstream of the culvert impacts include bank,grading, stabilization, and replanting The culverts have been shortened,and,tfierefore the,existmg
stream impacts have been minimized
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 openwater of
the U S then indiv ually list all open water,imiSacts below
4a
Open water
impact number
Permanent,(P) or
Temporary
4b
Name of waterbody
(if applicable)
4c
Type of Impact
4d
Waterbody
type
4e
Area of Impact (acres)
01 -
Choose one
Choose
02 -
Choose one
Choose
03 -
Choose one
Choose
04 -
Choose one
Choose
4f Total open water impacts
4g Comments
5. Pond or Lake Construction
If pond or lake construction proposed, the complete the chart below',
5a
Pond ID number
,5b
Proposed use or
purpose of pond
5c
Wetland Impacts (acres)
5d
Stream Impacts °(feet)
5e
Upland
(acres)
Flooded
'Filled
Excavated
Flooded
Filled
Excavated
P1
I Choose one
P2
Choose one
5f Total:
5g Comments. N/A
5h I's a dam high hazard permit required
Yes ❑ 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 any impacts require mitigation, then you MUST fill out Section D of this form
6a Project is in which protected basin?
XZ Neuse E] Tar - Pamlico Catawba ❑ Randleman ❑ Other
6b
Buffer Impact
number—
Permanent (P) or
Temporary
6c
Reason for Impact
6d
Stream name
6e
Buffer
mitigation
required?
6f
Zone 1
Impact
(square
feet )
6g
Zone 2
Impact
(square
feet
B1 T
Construction Access
UT to Richland Creek
'No
3,400
380
B2 P
Headwall and Pipe Ext
UT to Richland Creek
No
30
0
B3 P
Driveway
UT to,Richland Creek
No
0
0
B4 P
Landscape drain
UT to Richland Creek
No
0
4
B5 -
Yes /No
B6 -
Yes /No
6h Total Buffer Impacts:
3,400
384
61 Comments Bt impacts will include ,grading, sloping back,banks,,construction,access, and replanting 132,impacts include placement of a
Headwall and pipe extension 2 feet upstream B3 driveway replacement will be replaced to the existing dimensions or less
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 protect minimizes impact by shortening the length of the replacement pipes The driveway Will;be reconsiructed,to the original "footprint,oriess
1b Specificaliy,describe measures taken to avoid or minimize the proposed impacts through construction techniques.
Equipment will be kept above the creek and construction will only.occur in the limits of disturbance The floodplam,and,strearh will be stabilized and re-
vegetated with woody native species "
2. Coin ensato 'Mitigation for Impacts to Waters,of,the U.S. or Water&of the State
2a D'oes °the project require Compensatory Mitigation for
impacts to Waters,ofthe U S orWaters 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)
t
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,usmg stream,mitigation, stream temperature
Choose one
4d ;Buffer mitigation requested (DWQ only)
square feet
4e Ripanan- wetland mitigation requested
acres
4f ,Non- npanarrwetland 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
PC 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 No
6b If yes, then,identify the square feet of impact to each zone of the npanan buffer that requires mitigation Calculate the
amount of mitigation required
Zone
6c
Reason for impact
6d
Total impact
(square feet)
Multiplier
6e
Required mitigation
(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 npanan buffers identified
within one of the NC Riparian Buffer Protection Rules?
❑ Yes ❑X No
lb
If yes, then Is a diffuse flow,plan Included? If no, explain why
❑ Yes fx-1 No
2.
Stormwater Management Plan
2a
What Is the overall percent Imperviousness of this project?
12
2b
Does this project require a Stormwater Management Plan?
❑ Yes Q No
2c Ifthis project,DOES NOT require a Stormwater Management Plan, explain why,
No extra impervious,surfaces will be added dunng'regrading of driveway
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?
NIA
`3.
Certified Local Government Stormwater Review
3a
_ In which local government's jurisdiction is this project?
City of Raleigh
3b
Which of the following locally - Implemented stormwater management programs
apply (check all that apply)
® Phase II
❑ NSW
❑ USMP
❑ Water Supply Watershed
❑ Other
3c
Has the approved Stormwater'Management Plan with proofPof approval been
attached?
El Yes Q No
4. DWQ Stormwater Pro ram 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 ❑ No
5. DWQ 401, Unit Stormwater Review
5a
Does,the Stormwater Management Plan meet the appropriate requirements?
❑Yes 0 No
5b
Have all of the 401 Unit submittal requirements been met?
❑ Yes ❑ No
Page,8 of 10-
PCN'Form — Version 1 4 January 2009

F.
Supplementary Information
1.
Environmental Documentation,(DWQ,Requirement)
la
Does, the project'involve an expenditure of public (federal /state /local) funds or the
® Yes ❑ No
use of public (federal /state) land?
lb
If you answered "yes" to the above, does the project require: preparation of an
environmental document,pursuant to the requirements of'the National orrState
El Yes ❑X No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1 c
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
❑ Yes ❑`No
letter )
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 Welland Standards,
' ❑Yes 0 No
or Riparian Buffer Rules (15A NCAC 2B 0200)?
2b
Is this an after - the -fact permit,application?
❑Yes ® 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 futurwimpacts) result in
'❑Yes X❑ No
additional development, Which could impact nearby downstream water'quality?
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
N/A
4.
Sewage Disposal ,(DWQ Requirement)
4a 'Clearly detail ttie ultimate treatment methods and; disposition (non - discharge or discharge) of wastewater,generated from
the proposed project, or avadable,capacity of the,subject facility
N/A
Page 9,of40
PC Form — Version 1 4 January 2009

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5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a Will this project occur in or near an area with federally protected species or
❑Yes ❑X No
habitat
5b Have,you checked with the, USFWS concerning Endangered Species Act
❑Yes ®No
Impacts?
5c If yes,'indicate the USFWS FieldrOffice you -have contacted
-
5d What data" sources did you use to determine whether your site would Impact Endangered Species or Designated Critical
Habitat?
No endangered � species �of designated, critical, habitat, have beenIound within,the�prcject area
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 stream, is located in an urban area
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
❑ Yes ❑X No
status (e g , National Historic Trust designation or properties significant In
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 websde (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
8.,Flood Zone Designation (Corps Requirement),
8a Will this project occur in a FEMA- designated' 100 -year floodplain?
❑ Yes Q No
8b If yes, explain how project meets FEMA requirements
8c What source(s) did you use to make =the floodplain determination?
floodmaps nc gov
Carl' R Dawson, Jr PI=
(o��
Applicant/Agents Punted Name
Date
ppll ant/Ag+ta
(Agent's signature,is v rization
letter from the a
Page, 10.of 10

Documentation for`Pre- Construction Notification (PCN) Form
B Project Information and Prior Project History
'3a. Project Description
The project is located of North ,Carolina °Highway 54 and involves a single °family residential lot located at
6215 Chapel Hill Road. The 31.59 acre - watershed for the project consists primarily of commercial land
use. The watershed consists,of 43% impervious surface,, 21% residential lawn, 20% compacted gravel,
and 16% wooded area. An unnamed tributary to Richland Creek originates at a culvert at the adjacent
self- storage business to °the west of the project property. A,driveway at'6215 Chapel Hill Road crosses
the tributary and two 24 inch pipes,currently carry the flow under the driveway. The,existing culverts are
not large enough to handle frequent storm events and structural flooding is occurring. There is,a door
to the lower level of the house in'which stormwater can currently enter.
3d. Explain the purpose,of.the project.
The purpose of the project,is to upgrade the,culverts under the driveway to carry the 10 year storm
event and convey larger storms over top of the driveway. With the improvements stormwater will be
conveyed through the channel floodplain and away from structures on the property.
3e. Describe the,overall proiect in detail including the type of equipment to be used
The project will,consist of upgrading the two 24 inch pipes with two larger 36 inch RCP's. The driveway
will be re- graded to a trapezoidal weir to control flows for storm events�greater than the 10 year event.
A headwall will be,installed approximately two,feet south ofthe existing pipe,ends. The twin pipes will
extend 32 feet in length, approximately 9 feet south of the existing pipe outlets. The pipe outlet will be
graded south to provide 8 additional feet of channel length. Riprap is °proposed at the outlet of the twin
pipes. It will be installed around a portion of the bank and for a distance of 19 feet -along the channel
bed. Matting (Corr Mat C -700) is proposed to be installed on the channel banks at'the outlet. These
banks will also be replanted with rooted plant plugs for longterm stability. The floodpla_in that is
currently mowed above the top of the channel will be matted and replanted with grass in
to match
the existing conditions. Matting is needed in this area of the'floodplain as flows for larger storm events
are anticipated to overtop,the road.'Rip rap1s proposed upstream of the proposed pipe for a, length of
15 feet. The upstream banks will be,stabilized with a,combination of matting and riprap. The rip rap has
been placed on the upper eastern bank to protect the existing carport and shed, from 4uture erosion.
Water exiting the existing 36 inch pipe from the Self- Storage property has the potential to�cause-future
bank erosion due to high velocities. The strearn'banks upstream of the proposed culverts will be
stabilized with -woody vegetation for longterm stability. The floodplain on the upstream end adjacent to
the stream will be re -established into a lawn to match existing conditions. One 24 inch tree will be
removed on the western upstream bank for the, project-. A landscape drain is proposed to be installed in
the,yard adjacent to the driveway. There is'a'low area that does not drain after rain events and the drain
is needed to,,prevent water,backing up`into the house.
The equipment to be used in the project is earth moving equipment and various,other support
apparatuses. Heavy equipment may include hydraulic excavator, compactors, bulldozers, skidsteer
loaders, and,dump trucks to load and unload materials. The construction equipment will enter off of
Chapel Hill Road,and will perform all construction within a defined limits,of disturbance. A pump around
for'normal flow will be installed for construction.so thatthe work will be completed in the dry. No
construction equipment will cross the stream.

F. Supplementary Information
'5d. What data sourcesAid you use to determine whether your site would impact Endangered Species or
Designated Critical Habitat?
The project is located on �a developed urban residential lot. The project area is limited to land adjacent
to an existing driveway culvert.

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6213 & 6215 Chapel Hill Road Photo Log, Raleigh NC
Photo 1: Existing dual 24 -inch RCP culvert under driveway
Photo 2: Driveway that crosses the culvert

Photo 3: Channel looking upstream
Photo 4: Existing culverts

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"06ever the'naps are AwodLKxd ftw 'Whirr drl Wrpuses
afx1 are MOT sarveys NO warrarwes, eWeswa or 'MpljW
are prow ded for the dale ftrem. rls am Or rls'nterprelatton

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2 01 EROSION CONTROL MAT (CURLEX TYPE)
In general, erosion control Mat shall be applied to slopes greater than 2 1 which are
outside of active channels which are disturbed by construction operations and/or which are to
temam as finish grade surface' The mat,shall be curled wood excelsior with 80 %,six -inch fibers
or greater fiber length It shall be of consistent thickness, with fibers evenly distributed
throughout the entire area of the blanket. The top of°each blanket shall be covered with
photodegradable, or biodegradable netting The.matenal shall'be naturally seed free, with no
chemical additives The material shall'be American Excelsior Company °Curlex I or approved
equal and shall meet the following specifications.
Shear Stress
1.75 lb /sq ft
Longevity
1248 months
Fibers
Curled wood excelsior with 80% six -inch
fibers or greater'fiber length.
Erosion Control Mat will only be used in locations specified on the plans or as directed by the
Engineer
2 02 EROSION CONTROL BLANKET (C700 Type)
In general, erosion control blankets should be applied to. channels, and other steeply
sloped areas which ate disturbed by construction operations and/or which are ,to remain as finish
grade surfaces Erosion control blankets shall be a machme- produced 100% biodegradable mat.
The'blanket shall be•of consistent thickness with the coconut fiber evenly distributed over the
entire area of the mat. Erosion Control Blankets will. only be used in locations specified on the
plans or as directed by the Engineer.
Materials
Coconut fiber matting,shall benprovided.,to meetthe specifications provided "below
Matrix
100% Coconut Fiber
Weight
20 oz/SY 678 m2
Tensile.Stre_ngth
1348 x 626 lb /ft m_ immum (1650.5 x 766 5 kg /m)
El_o_n ation _
34% x _38%
Open Area measured
50%
Thickness _
0 30 inches minimum 7 6 mm
Flexibility,(Ig — cm),
65030'x'29590
,Recommended Flow
`1 l feet/second 3 35 m/s
Size
6 6 x 164 feet 1-20 SY or ,100 S
"C" Factor
0 002
Stakes will be wooden stakes 12 m. (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. Theatoe
stakes shall have a minimum 1 -inch by 1 -inch cross - section and shall be designed so that the
matting cannot slide past the exposed end of the stake.

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CHAMFER ALL CORNERS 1" OR HAVE A RADIUS OF 1 ".
PLACE 2 #S "Y" BARS IN ,THE TOP OF ALL ENDWALL FOR PIPE CULVERTS 42"
AND OVER WITH A MINIMUM OF S" COVER AND A LENGTH OF G" LESS THAN
ENDWALL LENGTH.
CONSTRUCT BOTTOM SLAB WITH FORMS.
DO'NOT INTERPRET WALL THICKNESS (T) SHOWN FOR THE,THICKNESS
ACCEPTABLE, BUT IS'USED IN COMPUTING ENDWALL QUANTITIES.
WHEN THE CONTRACTOR ELECTS TO,USE A CONSTRUCTION JOINT AT'THE BOTTOM
OF THE PIPE, PLACE BAR" "X" DOWELS IN THE BASE AS SHOWN ON PLANS.
SPACE BARS APPROXIMATELY ON 126 CENTERS UNLESS OTHERWISE DIRECTED
BY THE ENGINEER.
WHEN THE CONTRACTOR ELECTS TO USE A CONSTRUCTION JOINT AT THE BOTTOM
OF THE PIPE AND POUR THE BASE SEPARATELY 'LEAVE THE POUR ROUGH.
USE CLASS "B" CONCRETE.
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tl' OCT a
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4805 Green Rd. Suite 100 919) 876-0526
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AND OVER WITH A MINIMUM OF S" COVER AND A LENGTH OF G" LESS THAN
ENDWALL LENGTH.
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DO'NOT INTERPRET WALL THICKNESS (T) SHOWN FOR THE,THICKNESS
ACCEPTABLE, BUT IS'USED IN COMPUTING ENDWALL QUANTITIES.
WHEN THE CONTRACTOR ELECTS TO,USE A CONSTRUCTION JOINT AT'THE BOTTOM
OF THE PIPE, PLACE BAR" "X" DOWELS IN THE BASE AS SHOWN ON PLANS.
SPACE BARS APPROXIMATELY ON 126 CENTERS UNLESS OTHERWISE DIRECTED
BY THE ENGINEER.
WHEN THE CONTRACTOR ELECTS TO USE A CONSTRUCTION JOINT AT THE BOTTOM
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,CONCRETE ENDWALL FOR SINGLE AND DOUBLE, PIPE CULVERTS
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4805 Green Rd. Suite 100 919) 876-0526
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12" DRAIN BASIN
DUCTILE IRON GRATE
J / CAST IRON FRAME
INLET AND OUTLET
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4" THRU12"
VARIOUS TYPES OF OUTLETS
WITH WATERTIGHT ADAPTERS
FOR:
ADS N -12
SDR -35 SEWER
SCHEDULE 40 DWV
CORRUGATED PVC
RIBBED PVC
*(1) ADAPTERS CAN BE
MOUNTED ON ANY ANGLE
01 TO 3511 . TO
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ANGLE BETWEEN
ADAPTERS,SEE
MANUFACTURES DRAWING
12"
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VARIA op VARIABLEOVERALL
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*(2) MAXIMUM
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OVERALL HEIGHT 10'
SCALE NOT TO SCALE
12"' NYOPLAST DRAINS
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NOTE 1. WORK AREA TO BE STABILIZED AT THE END OF EACH WORK DAY.
2 ROCK SILT SCREENS REQUIRED FOR PUMP
AROUND OPERATIONS ARE CONSIDERED INCIDENTAL TO PUMPING.
I STABLE OUTLET TO CONSIST OF ROCK PLACED IN CHANNEL
FOR ENERGY DISSIPATION AND 45'
ELBOW INSTALLATION AT THE END OF THE PIPING iS0 THAT
THE WATER DISCHARGES VERTICALLY UP IN THE AIR. THE OUTLET YILL
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SCALE NOT TO SCALE
TYPICAL ■ ■ ■ 1 OPERATION
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