20030743 Ver 1_Complete File_20030618

?OF WATF9Q Michael F. Easley, Governor
William G. Ross Jr., Secretary
\O North Carolina Department of Environment and Natural Resources
?- Alan W. Klimek, P.E. Director
O Division of Water Quality
DWQ Project No.: 2-0o3 G 7 Y3 County:
Applicant: NC DO?
Project Name: <K 31/7/ -Z:e-u,
Date of Issuance of 401 Water Quality Certification:

Certificate of Completion
Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer
Rules, and any subsequent modifications, the applicant is required to return this certificate to the
401/Wetlands Unit, North Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC,
27699-1650. This form may be returned to DWQ by the applicant, the applicant's authorized agent, or
the project engineer. It is not necessary to send certificates from all of these.
Applicant' ertyca 'on
may/ /
Agent's Certification
hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed to
ce
be built within substantial complian and intent of the 401 Water Quality Certification and Buffer
Rules, the appro ecif s, and other sup ortii materials.
Signature: - Date: -?S
1, , hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed to
be built within substantial compliance and intent of the 401 Water Quality Certification and Buffer
Rules, the approved plans and specifications, and other supporting materials.
Signature: Date:
If this project was designed by a Certified Professional
1, , as a duly registered Professional (i.e.,
Engineer, Landscape Architect, Surveyor, etc.) in the State of North Carolina, having been authorized
to observe (periodically, weekly, full time) the construction of the project, for the Permitee hereby state
that, to the best of my abilities, due care and diligence was used in the observation of the construction
such that the construction was observed to be built within substantial compliance and intent of the 401
Water Quality Certification and Buffer Rules, the approved plans and specifications, and other
supporting materials.
Signature Registration No. Date
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6893 (fax), hftp://h2o.enr.state.nc.us/ncwetlands/
fX7
Aw
ibER
MEMORANDUM
TO: John Dorney Regional Contact:
Non-Discharge Branch WO Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name NCDOT - SR 3471
Project Number 03 0743
Recvd From DOT
Received Date 6/18/03 Recvd By Region
Project Type culvert extension
County BUNCOMBE
County2
Region Asheville
Certificates Stream Stream Impacts (ft.)
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim.- Supp. Basin Req. Req. EM
14 Stream P-7 O N 6-76-5-8 F -c- TR 40,302. 211.00 F 20.00
7770- _NF___ F___ F-?_ F___ F___ F___ ICI
Mitigation Wetland
MitigationType Type Acres Feet
Is Wetland Rating Sheet Attached? 0 Y 0 N Did you request more info? 0 Y 0 N
Have Project Changes/Conditions Been Discussed With Applicant? 0 Y 0 N
Is Mitigation required? 0 Y 0 N
Recommendation: 0 Issue 0 Issue/fond 0 Deny
Provided by Region: Latitude (ddmmss) 352933 Longitude (ddmmss) 824053
Comments:
DOT is proposing to grade and pave SR 3471 Laurel Hill Road. There will be one culvert
extension of 20 linear ft.
Recommend 401 be issued.
401 Certification 3403 issued on July 11, 2003,
cc: Regional Office Page Number 1
Central Office
* _ J
030743
STATE of NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY LYNDO TIPPETT
GOVERNOR
PO BOX 3279, ASHEVILLE, NC 28802
June 13, 2003
SECRETARY
Mr. Steve Lund
US Army Corps of Engineers JU
151 Patton Avenue, Room 208 N 2003
Asheville, NC 28801-5006 a 7: ? r q
Subject: Nationwide Permit #14
SR 3471, Laurel Hill Road
State Project No. 13C.011025(DWQ Minor Permit Fee $200)
Buncombe County, NC
Dear Mr. Lund:
I have enclosed a straight-line diagram with erosion control plan, a PCN application for
NWP #14, and a vicinity map relative to the proposed project on SR 3471, Laurel Hill
Road, Buncombe County, NC.
Laurel Hill Road is currently a 14-16 feet wide gravel road. Division of Highways plans
to pave the road 18 feet wide and increase the typical section. Grading will be light.
We propose to extend one existing culvert on an UT to Beaverdam Creek. Total culvert
extension will be 20 linear feet. No stream relocation will be performed for the project.
Existing channel morphology will be maintained upstream and downstream of the
culvert. The culvert will be placed below existing streambed elevation. Riparian
vegetation will be reestablished along disturbed areas associated with the culvert
extension. Stormwater will be diverted through grass-lined ditches or vegetated buffers
prior to entering streams.
No significant effect on federally listed species (threatened or endangered) or their
habitats is anticipated.
P4 ??Vf VT
1%6V?_D
AV
Mr. Steve Lund
Page -2 SR 3471, Buncombe County
June 13, 2003
As a part of the 401 Certification process, a copy of the application will be forwarded to
the NC State Historic Preservation Office as required by Section 106 of the National
Historic Preservation Act of 1966 and GS 121-12(a).
By copy of this letter, we request Owen Anderson, North Carolina Wildlife Resources
Commission Coordinator, to comment directly to the Corps concerning the permit
request.
By copy of this letter, we are asking Ed Ingle, Area Roadside Environmental Engineer, to
comment on the above project. Temporary encroachment into the buffer zone of the UT
will be required from Station 28+00 to 31+00. The stream is classified as trout. A buffer
variance will be required.
By copy of this letter, I am forwarding seven (7) copies of the application package to
Cynthia Van der Wiele, NC Division of Water Quality, 401/Wetland Unit and an
additional copy to Mike Parker, NC DWQ Asheville Regional Office for review and
comment. Please charge the application processing fee of $200.00 to WBS element #
13C.011025. Please forward comments directly to the Corps with copy to Division 13
Environmental Officer.
Your earliest consideration for this request would be greatly appreciated. If you have any
questions or information needs, please contact me at [phone].
Sincerely,
Roger D. Bryan
Division 13 Environmental Officer
Enclosures
cc: J.J. Swain, Jr., P.E.
K. A. Wilson, P.E.
Matt Taylor, P.E.
Ed Ingle
Owen Anderson
Cynthia Van der Wiele
Mike Parker
W
Office Use Only: 030743Form Version April 2001
USACE Action ID No. DWQ No.
If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than
leaving the space blank.
1. Processing
Check all of the approval(s) requested for this project:
X Section 404 Permit
? Section 10 Permit
X 401 Water Quality Certification
? Riparian or Watershed Buffer Rules
2. Nationwide, Regional or General Permit Number(s) Requested: NWP 14
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ?
4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for
mitigation of impacts (see section VIII - Mitigation), check here: ?
II. Applicant Information
1. Owner/Applicant Information
Name: NC Department of Transportation
Mailing Address: P.O. Box 3279
Asheville, NC 28802
Telephone Number: 828-251-6171 Fax Number: 828-251-6394
E-mail Address: rdbryanAdot.state.nc.us
2. Agent Information (A signed and dated copy of the Agent Authorization letter must be
attached if the Agent has signatory authority for the owner/applicant.) N/A
Name:
Company Affiliation:
Mailing Address:
Telephone Number: Fax Number:
E-mail Address:
Page 1 of 8
dl(
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: SR 3471 Laurel Hill Road
2. T.I.P. or State Project Number (NCDOT Only): 13C.01 1025
3. Property Identification Number (Tax PIN): N/A
4. Location
County: Buncombe Nearest Town: Candler
Subdivision name (include phase/lot number): N/A
Directions to site (include road numbers, landmarks, etc.): SR3471 is located off of NC 151
and SR 3449 approximately 3 miles south of Candler.
5. Site coordinates, if available (UTM or Lat/Long): 35 29'33"N 82 40'53"W
(Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the
coordinates for each crossing of a distinct waterbody.)
6. Describe the existing land use or condition of the site at the time of this application:
Existing secondary road
7. Property size (acres): 3.0
8. Nearest body of water (stream/river/sound/ocean/lake): UT to Beaverdam Creek (Class C -
TO
9. River Basin: French Broad
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/mVs/.)
Page 2 of 8
je
10. Describe the purpose of the proposed work: We propose to grade, drain, base, pave and
install erosion control measures for SR 3471 (Laurel Hill Road). We propose to extend one
existing culvert on an UT to Beaverdam Creek. Total stream impacts will be 20 linear feet.
The culverts will be installed to insure aquatic life passage within the streams.
11. List the type of equipment to be used to construct the project: Excavator, backhoe, an
d
trucks.
12. Describe the land use in the vicinity of this project: Rural, farmland, and pasture.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules.
N/A
V. Future Project Plans
Are any additional permit requests anticipated for this project in the future? If so, describe the
anticipated work, and provide justification for the exclusion of this work from the current
application: No, no future plans.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein, and must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a
delineation map, whether or not impacts are proposed to these systems. Wetland and stream
evaluation and delineation forms should be included as appropriate. Photographs may be
included at the applicant's discretion. If this proposed impact is strictly for wetland or stream
mitigation, list and describe the impact in Section VIII below. If additional space is needed for
listing or description, please attach a separate sheet.
1. Wetland Impacts
Wtlnd
ct
i
e Type of Impact* Area of Loca within
t e
t
Number
S Im
pact 100 year
F o d** N
ar st Stream Type of Wetland***
Page 3 of 8
1
List the total acreage (estimated) of existing wetlands on the property: 0.0
Total area of wetland impact proposed: 0.0
2. Stream Impacts, including all intermittent and perennial streams
Stream Impact
Site Number
(indicate on ma)
Type of Impact* Length of
Impact
linear feet)
Stream Name** Average Width
of Stream
Before Impact Perennial or
Intermittent?
leasespecify)
29+09 Culvert 20 UT to Beaverdam Crk 1 P

N/A
on
* List each impact separately and identifv temporary impacts. Impacts include, but are not limited to:
excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding.
** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps
(FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or
online at http://www.f'ema.gov.
*** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.)
* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap,
dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain),
stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is
proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included.
** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest
downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at
www.uses.gov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com,
www.mapguest.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 20 feet.
Page 4 of 8

3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any
other Water of the U.S.
Open Water Impact
Site Number
(indicate on ma)
N/A
Type of Impact* Area of
Impact
(acres) Name of Waterbody
(if applicable) Type of Waterbody
(lake, pond, estuary, sound,
bay, ocean, etc.)

1' d f 1l vation dred in
t , exca g g,
* List each impact separately and identify temporary impacts. Impacts mclude, but are not smite to,
flooding, drainage, bulkheads, etc.
4. Pond Creation - N/A
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
The existing secondary road must be improved to meet current safety standards for paved
roads The culvert extension requested is the minimum necessary to establish an appropriate
typical section for the roadway Riparian vegetation will be established on disturbed areas
associated with the project construction.
VIII. Mitigation - N/A
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
Page 5 of 8
X
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
http:/ih2o.enr.state.nc.us/ncwetlands/stnngide.html.
Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
N/A
2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that
you would like to pay into the NCWRP. Please note that payment into the NCWRP must be
reviewed and approved before it can be used to satisfy mitigation requirements. Applicants
will be notified early in the review process by the 401/Wetlands Unit if payment into the
NCWRP is available as an option. For additional information regarding the application
process for the NCWRP, check the NCWRP website at http:/ih2o.enr.state.nc.us/M/index.htm. If
use of the NCWRP is proposed, please check the appropriate box on page three and provide
the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Page 6 of 8
X
IX. Environmental Documentation (DWQ Only)
Does the project involve an expenditure of public funds or the use of public (federal/state/local)
land?
Yes X No ?
If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ? No X
If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a
copy of the NEPA or SEPA final approval letter.
Yes ? No ?
X. Proposed Impacts on Riparian and Watershed Buffers (DWQ Only) - N/A
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and
Water Supply Buffer Requirements), or other (please identify )?
Yes ? No X If you answered "yes", provide the following information:
Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer
mitigation is required calculate the required amount of mitigation by applying the buffer
multipliers.
Zone* Impact
(square feet) Multiplier Required
Mitigation
1 3
2 1.5
Total
lone t extenas out Su reet perpenatcutar trom near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or
Page 7 of 8
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 2B .0242 or .0260.
XI. Stormwater (DWQ Only)
Describe impervious acreage (both existing and proposed) versus total acreage on the site.
Discuss stormwater controls proposed in order to protect surface waters and wetlands
downstream from the property.
The existing compacted gravel roadway acts as an impervious surface. Paving of the roadway
should eliminate sedimentation from fines associated with gravel surface treatment. The
roadway surface will be 40% of right of way acreage. Stormwater will be diverted through
settling basins or grass lined buffers prior to entering the streams.
XII. Sewage Disposal (DWQ Only)- N/A
XIII. Violations (DWQ Only)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No X
Is this an after-the-fact permit application?
Yes ? No X
XIV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
With regard to hazardous spill basins the road is not classified as an arterial route, therefore
hazardous spill basins are not required.

Applit/Agent's-S(inature / Sate
(Agent s signature is valid only if an authorization letter from the applicant is provided.
Page 8 of 8
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Vicinity Map: SR 3471, Laurel Hill Road, Buncombe County, NC (Dunsmore Mountain
Quadrangle, Scale 1:24000).
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Figure 1. SR 3471 (Station 29+09), Laurel Hill Road, Buncombe County, NC
_' i _

N.C. DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
SECONDARY ROAD SURVEY
SUBJECT: SR 3471 LAUREL HILL RD.
LOCATION: FROM SR 3449 TO SR 3470
WORK TYPE: GRADE,DRAIN,BASE,PAVE&E.C.
WORK ORDER: PRIORITY: 40
COUNTY: BUNCOMBE
TOWNSHIP:NUMBER 16 UPPER HOMINY
DATE: NOV.26 52002 SCALE:1 "=50'
NOTES: R/W= 50' PREPARED BY: J.P.F.

f EROSION CONTROL
DETAILS AND SPECIFICATIONS
t
245.03 Temporary Silt Ditch---------------- T S D
.o Temporary Diversion-------------- T D
893.01 Temporary silt fence------------- H? ...
890.05 Temporary Slope Drain with Earth Berm-----
245.01 Silt Basin Type A------------------------------
245.02 Silt Basin Type B------------------------------
892.04 Temporary Rock Silt Check Type A-----------
895.10 Temporary Rock Silt Check Type B-----------
892.01 Temporary Rock Sediment Dam Type A-------
892.02 Temporary Rock Sediment Dom Type 8--------
897.01 Rock Pipe Inlet Protection--------------------
Pipe Outlet Energy Dissopotor---------------- 06
JW6
c6cm
894.01 Rock Silt Screen -------------------------------
rmn
11771
245.04 Stilling Basin--------------------------------
Rock Inlet Protection:
896.01 Type A--------------------------------------- A LU
896.02 Type B--------------------------------------- B13
896.03 Type C---------------------------------------c13
Erosion Control Matting--------------- ECM
Fiberglass Roving---------------------- FGR
EROSION CONTROL PLAN SHEET
Silt fences and temporary silt ditches shall be installed after clearing and
before grading.
Temporary stone ditch checks shall be installed as soon as ditch line is
established.
Pipe outlet and inlet protection will be done as soon as the pipe is installed.
Silt basins (Type B) will be constructed to the dimension of nine feet by
three feet by two feet unless otherwise noted on plans. (See SB-9 on
dimension sheet)
Seeding and other permanent erosion control measures are to be
implemented as soon as practical.
Temporary rock silt checks (Type B) will be spaced as required by percent
of grade.
PIPE INSTALLATION NOTES
1) Install erosion control devices. In streams, where necessary, rock silt
screens will be used.
2) Remove material and existing pipe while limiting, as much as possible,
material and sediment from entering the stream and/or escaping from the
project.
3) Prepare pipe foundation while again taking care to limit, as much as
possible, material and sediment from entering the stream and/or escaping
from the project. Where possible, new grade will be below the existing
streambed. If needed, bedding material will be clean stone.
4) Place the new pipe and compact backfill.
5) Install slope protection on outlet and inlet ends of pipe. Also complete
installation of erosion control measures and perform maintenance as
needed on existing measures.
6) Establish permanent vegetation as soon as possible.
ROADWAY DITCH AND MEDIAN LINING GUIDELINES
Percent of Grade Type of Linino- Recommended
S craw and Tack
2 -- rasiori- Control Matting
3
4 Synthetic Roving
5
greater Stone
VIII- 2 ,, ?_
r
?z
( S.B. 5 )
DESIGN FOR SILT BASIN
3, 71
2I
( S.E
NOT TO SCALE
CHECK EVERY STORM EVEMT AND
CLEAN OUT WHEN HALF FULL
6W CUSIC FEET PER ACRE
LENGTH OF DISTURBED AREA 100'
.-
2'
(S
R
I x
2'
(S
ii
/3'
I
2'
( S.B. 28 )
'?*l
LENGTH OF DISTURBED AREA 300'
LENGTH OF DISTURBED AREA 200'

LENGTH OF DISTURBED AREA 400'
PIPE OUTLET ENERGY DISSIPATOR: i •
A pipe outlet energy dissipator shall be used at pipe outlets to slow the water
velocities when it exits the pipe and flows out ditched or natural waterways. It is
an apron of stone of a sufficient thickness to protect the outlet area from scouring
out and causing-off-site sedimentation damage. Pipe outlet energy dissipators
should be built according to the guideline chart shown on page VIII-3 of this
manual.
AREAS OF USE:)
• Outlets of pipes' and culverts to prevent scouring.
DESIGN CRITERIA:
• In accordance with chart on page VIII-3.
• Filter fabric, or six inch layer of gravel, shall be used under stone.
MATERIALS :
• Filter fabric shall meet requirements of section 1056 of Standard
Specifications for Roads and Structures, January 1, 1990, for type II filter
fabric.
VI-34 March, 1993
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TEMPORARY SILT DITCH:
TSD
A temporary silt ditch shall be used in place of silt fence in many situations.
Temporary silt ditches shall be used at the toe of fill slopes to diverLmnoff into
sediment basins, temporary rock sediment dams, temporary rock silt checks and/or
_ other sedimentation control measures. Temporary silt ditches are approximately 1
ft. deep, I side slopes with an optional earth berm.
AREAS OF USE:
• Toe of fill slopes where'fill exceeds 3 ft in vertical height.
• Along streams to intercept flow and/or divert to a controlled outlet.
VI-2 March, 1993

VI-3 March, 1993

TEMPORARY SILT FENCE:
A temporary silt fence is commonly used at the toe of a fill section to prevent off-
site sedimentation. It is made of permeable filter fabric buried at the bottom;
stretched and supported by steel posts. The silt fence reduces the water flow while
retaining the sediment. They may also be used to divert water flow to protected
outlets. Silt fences need to be checked after each significant rainfall to ensure there
effectiveness. They must be maintained on a regular basis. Silt fences shall not be
installed across streams, ditches, or waterways.
AREAS OF USE:
At toe of fill sections where sediment runoff can be stored and contained
inside the project limits.
DESIGN CRITERIA:
Material With Wire Without Wire
Fabric Type 3 Class A Type 3 Class B
Steel posts length 5 ft 5 ft.
Post spacing 10 ft. 6 ft. maximum
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1832-723
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1793-368
PO BOX 604
CANDLER NC 28715
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CANDLER NC 28715
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1649-494
PO BOX 1763
.I CANDLER NC 28715
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DIAL ? ! 4 I.USE TEMP ROCK SEDIMENT GAMS
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FILLSLOPES 2 5' OR MOORE
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D.E. & LUCINDA W GASPERSON
1273-641
95 BROWNSVIEW CH. RD.
CANDLER NC 28715
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1832-723
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284-429
134 FANNING FIELDS RD.
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1146-743
205 BROWNSVIEW CH. RD.
CANDLER NC 28715
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1808-479
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2077-788
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CANDLER NC 28715
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1495-718
289 BROWNSVIEW CH, RD. I
CANDLER NC 28715
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2330-820
PO BOX 604
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1273-639 LAWN
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1606-781
330 BROWNSVIEW CH. RD.
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2738-469
250 BROWNSVIEW CH. RD.
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