20020619 Ver 1_Complete File_20020423

F Wg7-F Michael F. Easley, Governor
\o?O RQG William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
C/} 7 Gregory J. Thorpe, Ph.D.
> 1 Acting Director
z? Division of Water Quality
April 25, 2002
Madison County
DWQ Project No. 020619
SR 1124 (Dry Pond Road)
APPROVAL of 401 Water Quality Certification with Additional Conditions
Mr. Roger D. Bryan, Division Environmental Officer
NCDOT Division 13
P.O. Box 3279
Asheville, NC 28802
Dear Mr. Bryan:
You have our approval, in accordance with the attached conditions and those listed below, to impact
116 linear feet of Bear Creek and its unnamed tributaries in order to improve SR 1124 (Dry Pond
Road) in Madison County. The project should be constructed in accordance with your application
dated April 17, 2002 (received April 23, 2002). After reviewing your application, we have decided
that this fill is covered by General Water Quality Certification No. 3375 corresponding to the U.S.
Army Corps of Engineers Nationwide Permit Number 14. In addition, you should acquire any other
federal, state or local permits before you proceed with your project including (but not limited to)
Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. This
approval will expire with the accompanying 404 permit unless otherwise specified in the Water
Quality Certification.
This approval is only valid for the purpose and design that you described in your application except as
modified below. If you change your project, you must notify us, in writing, and send us a new
application. If the property is sold, the new owner must be given a copy of this Certification and
approval letter and is thereby responsible for complying with all conditions. If total wetland fills for
this project (now or in the future) exceed one acre or stream impacts exceed 150 linear feet,
compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). For
this approval to be valid, you must follow the conditions listed in the attached certification and any
additional conditions listed below.
°- - 1: -Alt work- shalt-be perforn ecl' duribg low flow conditions.
-
2. All mechanized equipment operated near surface waters must be regularly inspected and
maintained to prevent contamination of stream waters from fuels. lubricants. hydraulic fluids, or
other toxic materials.
3. The presence of equipment in the channels must be minimized. Under no circumstances must
rock, sand or other materials be dredged from the wetted stream channel under authorization of
this permit, except in the immediate vicinity of the culverts.
4. Riparian vegetation mustbe reestablished within the construction limits of the project by the end
of the growing season following completion of construction.
5. Upon completion of the project, the NCDOT shall complete and return the enclosed "Certificate
of Completion" form to notify NCDWQ when all work included in the §401 Certification has
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 (tax), httpJ/h2o.enr.state.rc.us/ncwetlands/
been completed. The responsible party shall complete the attached form and return it to the NC
Division of Water Quality, 401/Wetlands Unit when construction has been completed.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory
hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing,
send a written petition that conforms to Chapter 150B of the North Carolina General Statutes to the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This
certification and its conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean
Water Act. If you have any questions, please telephone Ms. Cynthia Van Der Wiele at 919.733.5715
or Mr. Mike Parker of the Asheville Regional Office at 828.251.6208.
Sincerely,
Attachment
y J. Thorpe, Ph.D
Director
Pc: Wilmington District Corps of Engineers
Steve Lund, USACE Asheville Field Office
Mike Parker, NCDWQ Asheville Regional Office
Central Files
File Copy
O ?yranq
619
6
02.
STATE OF NORTH CAROLINA
M1 S r ?..:
47
F /APR 2 3 2002
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY LYNDO TIPPETT
GOVERNOR
PO BOX 3279, ASHEVILLE, NC 28802
April 17, 2002
SECRETARY
Mr. Steve Lund ;'eau m
US Army Corps of Engineers OPY
151 Patton Avenue, Room 208 FILE C
Asheville, NC 28801-5006
Subject: Nationwide Permit #14
SR 1124, Dry Pond Road
State Project No. 6.862288 (DWQ Minor Permit Fee $200)
Madison 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 1124, Dry Pond
Road, Madison County, NC.
Dry Pond Road is currently a 12-14 feet wide gravel road. Division of Highways plans to
pave the road 18 feet wide and increase the typical section. Grading will be moderate to
heavy.
We propose to extend four existing culverts on UT's to Bear Creek Branch. Total culvert
extensions will be 116 linear feet with no more than 80 feet on a single UT. Existing
channel morphology will be maintained upstream and downstream of the culverts. The
culverts will be placed below existing streambed elevation. Riparian vegetation will be
reestablished along disturbed areas associated with the culvert extensions. Stormwater
will be diverted through grass-lined ditches or vegetated buffers prior to entering streams.
No stream relocation will be performed for the project. In situations where a stream
parallels the existing roadway, best management practices adopted by DOT require that
the proposed widening occur on the side opposite the stream. To the extent practical, the
shoulder adjacent to the stream will also be widened to increase the vegetated buffer area
between the roadway and streams. In addition, erosion control measures for sensitive
areas will be installed, including silt fence and a diversion berm.
?j'f
Mr. Steve Lund
Page -2 SR 1124, Madison County
April 17, 2002
No significant effect on federally listed species (threatened or endangered) or their
habitats is anticipated.
By copy of this letter, we request Owen Anderson, North Carolina Wildlife Resources
Commission Mountain Region 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's to Bear Branch will be required from Station 10+00 to 27+00. The stream is not
classified as trout. NO 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 DENR, Division of Water Quality, 401/Wetland Unit for
review and comment. Please charge the application processing fee of $200.00 to work
order # 6.862288. 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,
R er ry?
!B
Division 13 Environmental Officer
Enclosures
cc: F. D. Martin, P.E.
K. A. Wilson, P.E.
Ron Brazil
Ed Ingle
Owen Anderson
Cynthia Van der Wiele

Office Use Only: 020619 Form 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
1. 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
Owner/Applicant Information
Name: NC Department of Transportation
Mailing Address: P.O. Box 3279
Asheville NC 28802
Telephone Number: 828-251-6287 Fax Number: 828-251-6394
E-mail Address: rdbryan( dot 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.)
Name:
Company Affiliation:
Mailing Address:
Telephone Number: Fax Number:
E-mail Address:
Page 1 of 8
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 1124 Drv Pond Road
2. T.I.P. or State Project Number (NCDOT Only): 6.862288
3. Property Identification Number (Tax PIN):
4. Location
County: Madison Nearest Town: Marshall
Subdivision name (include phase/lot number):
Directions to site (include road numbers, landmarks, etc.): SR1124 is located between Bear
Creek Road (SR 1114) and Little Pine Road (SR 1135). Take 25/70 from Marshall, then left
onto SR 1135. Go across the French Broad River below Redmon Dam and turn left onto SR
1114 SR 1124 is approximately 1.6 miles on right.
5. Site coordinates, if available (UTM or Lat/Long): 35 4635"N 82 43'14'V
(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): 7.3
8. Nearest body of water (stream/river/sound/ocean/lake): UT's to Bear Creek
9. River Basin: French Broad
Page 2 of 8
(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/adinin/mUs/.)
10. Describe the purpose of the proposed work: We propose to grade, drain, base, pave and
install erosion control measures for SR 1124 (DKy Pond Road) We propose to extend four
existing culverts on UT's to Bear Creek. Total stream impacts will be 116 linear feet. The
culverts will be installed to insure aquatic life passage within the streams.
d
11. List the type of equipment to be used to construct the project: Excavator, backhoe, an
trucks.
12. Describe the land use in the vicinity of this project: Rural, farms, and wooded.
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.
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 lans
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
Page 3 of 8
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
Wetland Impact
Site Number
(indicate on ma)
Type of Impact* Area of
Impact
(acres) Located within
100-year Floodplain**
(es/no) Distance to
Nearest Stream
linear feet)
Type of Wetland***
N/A

* List each impact separately and identify temporary impacts. Impacts include, but are not nmttea to: mechanized deanng, grading, tun,
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 hqp://www.fema.Qov.
*** 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 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)
15+03 Culvert 36 UT 2 to UT 1 2 P
19+28 Culvert 30 UT 1 to Bear Creek 2 P
29+40 Culvert 30 UT 1 to Bear Creek 1 P
33+98 Culvert 20 UT 1 to Bear Creek 1 P

* List each impact separately and identify temporary impacts. Impacts include, but are not united to. cuivcns and associated np-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
Page 4 of 8
www.usgs.gov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.tonozone.com,
www.mapqucst.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 116 feet.
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)
Type of Impact* Area of
Impact
acres Name of Waterbody
(if applicable) Type of Waterbody
(lake, pond, estuary, sound,
bay, ocean, etc.
N/A

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: tui, excavation, dredging,
flooding, drainage, bulkheads, etc.
4. Pond Creation
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 secondM road must be improved to meet current safety standards for paved
roads The culvert extensions requested are 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 Whenever streams parallel the existing roadway,
widening will occur on the side opposite the stream. Appropriate erosion control measures will
be installed along the stream for protection during road construction.
Page 5 of 8
VIII. Mitigation
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
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://h2o.enr.state.nc.us/ncwetlands/stn-ngide.htlnl.
1. 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 htlp:Hh2o.enr.state.nc.us/wyM/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):
Page 6 of 8
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):
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)
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
(Neuse), 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
* Zone I extends out 30 feet perpendicular from near oanx or cnannei; c,unc I cxwnus an
additional 20 feet from the edge of Zone 1.
Page 7 of 8
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
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)
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
4
(Agent's signature is valid only if an authorization letter from the applicant is provided.
Page 8 of 8
1
Vicinity Map: SR 1124, Dry Pond Road, Madison County, NC (Marshall
Quadrangle, Scale 1:24000).
N.C. DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
SECONDARY ROAD SURVEY
SUBJECT: S.R.1124 DRY POND RD.
LOCATION: FROM SR 1114 TO SR 1125
WORK TYPE: GRADE,DRAIN,BASE,PAVE&E.C.
WORK ORDER: PRIORITY: 15
COUNTY:MADISON TOWNSHIP: S. MARSHALL
DATE:APRIL 03,2002 SCALE:1 "=50'
NOTES: R/W= 50' PREPARED BY: J.P.F.

EROSION CONTROL PLAN SHEET
Silt fences and temporary silt ditches shall be installed after clearing and
before grading. s
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 GUI
DELINE,S
Percent of Grade 's
Type of Lining Recommended
0
Scraw and Tack
2 :rdsiori- Control Maccina
3 ----
4 Synchecic Rovin..
5
greatcr Scone

21 ? 5'
r
?z
( S.B. 5 )
DESIGN FOR SILT BASIN
T 7'
J
r1. :
( S.E
I''
zZ
(S
3A
zT
(S
/I
/3'
I
2'
( S.B. 28 )

NOT TO SCALE
CHECK EVERY STORM EVENT AND
CLEAN OUT WHEN HALF FULL
600 CUBIC FEET PER ACRE
LENGTH OF DISTURBED AREA 100'
LENGTH OF DISTURBED AREA 200'
'l-ki
LENGTH OF DISTURBED AREA 300'
7
LENGTH OF DISTURBED AREA 400'
EROSION CONTROL
DETAILS AND SPECIFICATIONS
t # Descri tion
245.03 Temporary Silt Ditch----------------
245.05 Temporary Diversion--------------
893.01 Temporary slit fence-------------
890.05
245.01
245.02
892.04
895.10
892.01
892.02
897.01
894.01
245.04
S- -
TSD-
----~ TD --------
Temporary Slope Drain with Earth Berm-----
Silt Basin Type A------------------------------
Slit Basin Type B------------------------------
Temporary Rock Silt Check Type A-----------
Temporary Rock Silt Check Type B-----------
Temporary Rock Sediment Dam Type A-------
Temporary Rock Sediment Dom Type B--------
-E?
Rock Pipe Inlet Protection-------------------- Aft6
Pipe Outlet Energy Dissopotor---------------- -moo,
Rock Silt Screen-------------------------------
r=n
Stilling Basin------------------------------------
vl?
Rock Inlet Protection:
896.01
896.02
896.03
Type A--------------------------------------- H LU
Type 8--------------------------------------- B13
Type C--------------------------------------- C
Erosion Control Matting--------------- ECM
Fiberglass Roving---------------------- ---- FGR

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VI-17 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
Fabric
Steel posts length
Post spacing
With Wire
Type 3 Class A
S ft
10 ft.
Without Wire
Type 3 Class B
5 ft.
6 ft. maximum
VI-6 March, 1993
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