20021352 Ver 1_Complete File_20020826

W ATF Michael F. Easley, Governor
Q R
Q? QG William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
`
vj Alan W. Klimek, P.E. Director
> Division of Water Quality
y

September 6, 2002
Madison County
DWQ Project No. 021353
SR 1443 (Rye Patch 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 68
linear feet Calvin Creek and one of its unnamed tributaries in order to upgrade SR 1443 (Rye Patch Road)
in Madison County. The project should be constructed in accordance with your application dated August
21, 2002 (received August 26, 2002), including the environmental commitments made in the application
letter. 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. NCDOT shall use Best Management Practices for the Protection of Surface Waters (NCDOT March
1997).
2. Sedimentation and Erosion Control Guidelines for Sensitive Watersheds [15A NCAC 4B .0124] shall
be implemented prior to any ground-disturbing activities to minimize impacts to downstream aquatic
resources.
3. Stormwater should be directed to buffer areas or retention basins and must not be routed directly into
streams. Mowing of existing vegetated buffers is strongly discouraged, so that they may be utilized
for storm water sheet flow.
4. In-stream work and land disturbance within the 25-foot wide buffer zone are prohibited during the
trout spawning season of October 15 through April 15, or other conditions as determined by the
North Carolina Wildlife Resources Commission, to protect the egg and fry stages of trout from
sedimentation during construction.
5. Riparian vegetation must be reestablished within the construction limits of the project by the end of
the growing season following completion of construction.
6. NCDOT is encouraged to use existing on-site vegetation and materials for stream bank stabilization
anrd to minimi7P the nca of rip rap -
AS
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), http://h2o.enr.state.nc.us/ncwetiands/
7. The pipes required for this project shall be installed in such a manner that the original stream profile
is not altered (i.e. the depth of the channel must not be reduced by a widening of the streambed).
Existing stream dimensions (including the pattern and profile) are to be maintained above and below
locations of each culvert. The culvert shall be designed and installed to allow for fish and other
wildlife movement as well as prevent headcutting of the streams. If any of the existing pipes are
perched, they shall be removed and replaced, and installed correctly.
8. NCDOT must submit a plan for written DWQ approval to address any headcutting that will occur as a
result of this project.
9. Use of rip-rap for bank stabilization is to be. minimized; rather, native vegetation is to be planted
when practical. If rip-rap is necessary, it must be limited to the stream bank below the high water
mark, and vegetation must be used for stabilization above high water. Rip rap shall not be placed in
the stream bottom.
10. 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 been completed. The responsible party shall complete the attached form
and return it to the 401/Wetlands Unit of the NC Division of Water Quality upon
completion of the project.
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.
Attachment
Pc: Wilmington District Corps of Engineers
Steve Lund, USACE Asheville Field Office
Mike Parker, NCDWQ Asheville Regional Office
Central Files
Klimek, 5P,
File Copy
tel. -aSpTEoa
?W a w=y
- P.M;
STATE of NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
PO BOX 3279, ASHEVILLE, NC 28802
August 21, 2002
Mr. Steve Lund
US Army Corps of Engineers
151 Patton Avenue, Room 208
Asheville, NC 28801-5006
Subject:
FILE COPY--
? O ' j' `L_
Nationwide Permit #14
SR 1443 Rye Patch 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 1443, Rye Patch
Road, Madison County, NC.
Rye Patch 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.
We propose to extend two existing culverts on Calvin Creek and an UT. Total culvert
extensions will be 68 linear feet. 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.

021352
LYNDO TIPPETT
Mr. Steve Lund
Page -2 SR 1443, Madison County
August 21, 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
Calvin Creek will not be required. Calvin Creek is classified as trout.
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,
RoTrD. Bryan
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: Form Version April 2001
USACE Action ID No. DWQ No. 0 213 5 2
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
1. 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(a__)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 1443 Rye Patch 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: Spillcorn
Subdivision name (include phase/lot number):
Directions to site (include road numbers, landmarks, etc.): SRI 443 is located off of
Spillcorn and Calvin Roads (SR 1330 and 1332) Go North on Big Laurel Road from NC 212
to access S illcorn Road. The road is near the NC/TN line.
5. Site coordinates, if available (UTM or Lat/Long): 35 58'31"N 82 37'36"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 second road
7. Property size (acres): 2.6
8. Nearest body of water (stream/river/sound/ocean/lake): Calvin Creek
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/maps/.)
10. Describe the purpose of the proposed work: We propose to Uade drain base pave and
install erosion control measures for SR 1443 (Rye Patch Road) We propose to extend two
Page 2 of 8
existiniz culverts on Calvin Creek and an UT Total stream impacts will be 68 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, and
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.
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
Wetland Impact Area of Located within Distance to
Site Number Type of Impact* Impact 100-year Floodplain** Nearest Stream Type of Wetland***
indicate on ma) (acres) (es/no (linear feet
Page 3 of 8
N/A
* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, fill,
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 httn:%/www.fema.go .
*** 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 Im act Perennial or
Intermittent?
leasespecify)
10+55 Culvert 38 Calvin Creek 4 P
25+26 Culvert 30 UT to Calvin Creek 3 P

* 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.usas.aov. Several internet sites also allow direct download and printing of USGS maps (e.g., wwwjooozone.com,
www.mgpguest.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 68 feet.
3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any
other Water of the U.S.
Page 4 of 8
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: fill, 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 secondary road must be improved to meet current safety standards for paved
roads The culvert extensions requested are the minimum necessary to establish an appropriate
Wical 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.
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.
Page 5 of 8
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
htlp://h2o.enr.state.nc.us/ncwetlands/stnnlide.htrnl.
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 htW:/;`h2o.enr.state.nc.us/wrp/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
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 ?
X.
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 ?
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
(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
s uare feet Multiplier Required
Mitigation
1 3
2 1.5
Total
* Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone Z 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
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 2B .0242 or .0260.
Page 7 of 8
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 30% 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 El 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.
2/
t/Agent's Signat#e lip e
signature is vali only if an authorization letter from the applicant is provided.
Page 8 of 8
1
N
Vicinity Map: SR 1443, Rye Patch Road, Madison County, NC (White Rock
Quadrangle, Scale 1:24000).
N.C. DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
SECONDARY ROAD SURVEY
SUBJECT: SR 1443 RYE PATCH RD.
LOCATION: FROM SR1332 TO E.O.M.
WORK TYPE: GRADE,DRAIN,BASE,PAVE&E.C.
WORK ORDER: PRIORITY: 11
COUNTY: MADISON
TOWNSHIP: # 2 LAUREL
DATE:AUG. 09,2002 SCALE:1"=50'
NOTES: R/W= 45' PREPARED BY: J.P.F.
lg?
EROSION CONTROL
DETAILS AND SPECIFICATIONS
Std. DescriiDt ion S ymbol
245.03 Temporary Silt Ditch ----------------
TSD
245.05 Temporary Diversion-------------- -? TD --
893.01 Temporary silt fence------------- T;
890.05 Temporary Slope Drain with Earth Berm-----
245.01 Slit Basin Type A------------------------------ --O
245.02 Silt Basin Type B------------------------------
892.04 Temporary Rock Silt Check Type A-----------
895.10 Temporary Rock Silt Check Type 8-----------
892.01 Temporary Rock Sediment Dom Type A-------
892.02 Temporary Rock Sediment Dom Type 8--------
897.01 Rock Pipe Inlet Protection--------------------
Pipe Outlet Energy Dissopotor---------------- AA.
894.01 Rock Slit Screen-------------------------------
rmn
245.04 Stilling Basin------------------------------------
vl?
Rock Inlet Protection:
896.01 Type A--------------------------------------- A LU
896.02 Type B--------------- ------ B LU
896.03 Type C ---------------------------- C g UOE?J
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 Lining Recommended
Straw and Tack
2 -E-n5siori• Control Matting
3
4 Synthetic Rovirkso,
S
greater Stone
• • VIII- 2 a ?_ .L ,
r
?z
( S.B. 5 )
( S.E
NOT TO SCALE
CHECK EVERY STOW EVENT MID
CLEAN W WHEN HAV Full.
6010 CE/SC FEET PER ACRE
LENGTH OF DISTURBED AREA 100'
141 2'
(S
LENGTH OF DISTURBED AREA 200'
I? 21'
2'
DESIGN FOR SILT
3* 71
1 K N
2?
( S.B. 21)
TI3
2'
J-
( S.B. 28 )
LENGTH OF DISTURBED AREA 300'
BASIN

LENGTH OF DISTURBED AREA 400'
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VI-35 March, 1993
1
TEMPORARY SILT DITCH:
T8D -
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 divert-runoff 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, 2:1 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
.t
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

VI-6 March, 1993
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