HomeMy WebLinkAbout20051113 Ver 1_Complete File_20050622Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 28, 2005
Jack Horton, County Manager
Haywood County
Courthouse
215 North Main Street
Waynesville, NC 28786
Subject Property: Burnett Cove & East Fork Pigeon EWP
DWQ Project # 05-1113
Haywood County
Approval of 401 Water Quality Certification with Additional Conditions
Dear Mr. Horton:
You have our approval, in accordance with the attached conditions and those listed
below, to place fill within or otherwise impact 650 feet of streams for the purpose of
streambank stabilization at the subject properties, as described within your application
received by the N.C. Division of Water Quality (DWQ) on June 27, 2005. After
reviewing your application, we have decided that the impacts are covered by General
Water Quality Certification Number(s) 3367 (3367). The Certification(s) allows you to
use Nationwide Permit(s) 37 when issued by the US Army Corps of Engineers
(USACE). In addition, you should obtain or otherwise comply with any other required
federal, state or local permits before you go ahead with your project including (but not
limited to) Erosion and Sediment Control, Non-discharge, and stormwater regulations.
Also, this approval to proceed with your proposed impacts or to conduct impacts
to waters as depicted in your application shall expire upon expiration of the 404
or CAMA Permit.
This approval is for the purpose and design that you described in your application. If
you change your project, you must notify us and you may be required to 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 fills for this project (now or in the future) exceed one acre of wetland
or 150 linear feet of stream, compensatory mitigation may be required as described in
15A NCAC 2H .0506 (h). This approval requires you to follow the conditions listed in
the, attached certification and any additional conditions listed below.
The Additional Conditions of the Certification are:
401 Wetlands Certification Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: 919.733-1786 / FAX 919-733-6893 / Intemet: htto:/lh2o.enr.state.nc.us/ncwetlands
o One
NhCarolma
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Haywood County:
Page 2 of 6 -
June 28, 2005
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific
and general conditions of this Certification (or Isolated Wetland Permit) are met.
No other impacts are approved including incidental impacts:
Amount
Approved Units Plan Location or Reference
Stream 650 feet East Fork Pigeon River
2. Erosion & Sediment Control Practices
Erosion and sediment control practices must be in full compliance with all
specifications governing the proper design, installation and operation and
maintenance of such Best Management Practices in order to protect surface
waters standards:
a. The erosion and sediment control measures for the project must be
designed, installed, operated, and maintained in accordance with the most
recent version of the North Carolina Sediment and Erosion Control Planning
and Design Manual.
b. The design, installation, operation, and maintenance of the sediment and
erosion control measures must be such that they equal, or exceed, the
requirements specified in the most recent version of the North Carolina
Sediment and Erosion Control Manual. The devices shall be maintained on
all construction sites, borrow sites, and waste pile (spoil) projects, including
contractor-owned or leased borrow pits associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must be
designed, installed, operated, and maintained in accordance with the most
recent version of the North Carolina Surface Mining Manual.
d. The reclamation measures and implementation must comply with the
reclamation in accordance with the requirements of the Sedimentation
Pollution Control Act.
3. No Waste, Spoil, Solids, or Fill of Any Kind
No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian
areas beyond the footprint of the impacts depicted in the Pre-Construction
Notification. All construction activities, including the design, installation, operation,
and maintenance of sediment and erosion control Best Management Practices,
shall be performed so that no violations of state water quality standards, statutes,
or rules occur.
V
Haywood County:
Page 3 of 6
June 28, 2005
4. No Sediment & Erosion Control Measures w/n Wetlands or Waters
Sediment and erosion control measures shall not be placed in wetlands or waters
to the maximum extent practicable. If placement of sediment and erosion control
devices in wetlands and waters is unavoidable, they shall be removed and the
natural grade restored within six months of the date that the Division of Land
Resources has released the project.
5. 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 the attached certificate of completion to the 401/Wetlands Unit,
North Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC,
27699-1650.
6. Construction in this creek and disturbance within a 25-foot trout buffer should be
avoided during the January 1 to April 15 rainbow trout spawning period to avoid
adverse effects of sediment on eggs and larvae. However, Wildlife Resources
Commission will not object to construction of Natural Resources Conservation
Service "urgent and compelling" sites during the spawning period provided these
projects are, to the extent appropriate and practical, constructed by: (1) using flow
diversion structures such as sand bags, (2) placing large-sized rock toes and filter
cloth backing for stabilization sites before backfilling, and (3) excavating new
channel alignments in dry areas. Construction at the other non-"urgent and
compelling" sites should not occur during the spawning period to minimize the
potential adverse effects of multiple construction activities on trout resources in this
creek.
7. Sediment and erosion control measures must be implemented prior to construction
and maintained on the sites to minimize sediment in downstream areas. Seeding for
a temporary cover of wheat, millet, or similar annual grain or permanent herbaceous
cover should occur on all bare soil within five (5) days of ground disturbing activities
to provide long-term erosion control. The projects should be accomplished in stages
instead of leaving large tracts exposed to further storm events. Erosion control
matting should be used in conjunction with appropriate seeding on disturbed soils in
,steep slope and riparian areas. Matting should be secured in place with staples,
stakes, or, wherever possible, live stakes of native trees. Straw mulch and tall
j ,fescue should not be used in riparian areas. In addition, because of an anticipated
difficulty in establishing ground cover during the winter, reseeding should be
conducted, as necessary, in the spring-time with a native annual and perennial seed
mix with a temporary nursery crop of wheat, millet or other grain.
Haywood County:
Page 4 of 6
June 28, 2005 `
8. Only clean, large, angular rock, large woody material, or other natural stream design
materials and techniques should be used for bank stabilization. Rock should not be
placed in the stream channel in a manner that constricts stream flow or that will
impede aquatic life movements during low flow conditions. Filter cloth should be
placed behind large rock that is used for bank stabilization. Properly designed rock
vanes should be constructed wherever appropriate on bank stabilization and
channel realignment stream reaches to improve channel stability and to improve
aquatic habitat. Root wads should be installed low enough in the bank so that a
significant portion (at least one-third) the root wad is inundated during normal flows.
9. The channel should be restored to a more stable condition. However, under no
circumstancesi should river rock, sand or other materials be dredged from the stream
channel under authorization of this permit except, if necessary, in the immediate
vicinity of the eroding banks for the explicit purpose of anchoring stabilizing or
flow/grade control structures or for reestablishing the natural and more stable stream
channel dimensions. Stream bed materials are unstable in flowing-water situations
and are unsuitable for bank stabilization. In stream dredging has catastrophic effects
on aquatic life and disturbance of the natural form of the stream channel can cause
downstream erosion problems. The natural dimension, pattern, and profile of the
stream upstream and downstream of the permitted area should not be modified by
widening the stream channel or changing its depth.
10. Stabilization measures should only be applied on or near existing erosion sites,
leaving other stable stream bank areas in a natural condition. Grading and
backfilling should be minimized and tree and shrub growth should be retained where
possible to ensure long term availability of stream bank cover for aquatic life and
wildlife. Backfill materials should be obtained from upland sites except in cases
where excess stream bed materials are available. Berms should not be permitted
because they block the floodplain, constrict and accelerate flood flows, and often fail
and sometimes impede drainage during large flood events.
11. Repairs to eroded banks should be conducted in a dry work area where possible.
Sandbags or other clean diversion structures should be used where possible to
minimize excavation in flowing water. Channel realignments should be constructed
by excavating the new channel from downstream to upstream before connecting it to
the old channel.
12. Heavy equipment should be operated from the bank whenever possible. All
mechanized equipment operated near surface waters should be inspected and
maintained regularly to prevent contamination of stream waters from fuels,
lubricants, hydraulic fluids or other toxic materials. Equipment used in stream
channel must be clean, new or low hour equipment.
13. Disturbed stream banks and a 25-foot vegetated zone, or the widest width that is
practical under the site conditions, should be restored where possible along the
construction sites to natural riparian conditions with native trees and shrubs (e.g.,
silky dogwood, rhododendron, dog hobble, red maple, silky willow, tag alder, black
willow, sycamore) to provide long-term bank stability and stream shading. Note,
silky dogwood, silky willow and black willow can be planted as live stakes collected
during the dormant growing season. Cuttings should be randomly planted on four
(4) foot centers from the waters edge to the top of the bank. Trees should be planted
on ten (10) to twelve (12) foot centers. Stream banks in these areas should also be
Haywood County:
Page 5 of 6
June 28, 2005
seeded with a native annual and perennial seed mix with a temporary nursery crop
of wheat, millet or other grain.
14. If pasture along the stream is to be used for grazing, a fence must be constructed
outside of the riparian zone and the stream to prevent livestock from entering these
areas.
15. Diffuse Flow
All constructed stormwater conveyance outlets shall be directed and maintained
as diffuse flow at non-erosive velocities through the protected riparian zones
such that it will not re-concentrate before discharging into a stream. If this is not
possible, it may be necessary to provide stormwater facilities that are considered
to remove nitrogen. This may require additional approval from this Office.
16. Riparian Zone Replanting
Replanting of vegetation within disturbed areas located within 25 feet of the
streambank associated with any land disturbing activity, repair, replacement
and/or maintenance must be done in a manner consistant with the Guidelines
for Riparian Buffer Restoration immediately following construction. (Please
see attached.)
45. Deed Notifications
Deed notifications or similar mechanisms shall be placed on all retained
jurisdictional wetlands, waters and protective woody riparian zones in order to
assure compliance for future wetland, water and buffer impact. These
mechanisms shall be put in place prior to impacting any wetlands, waters and/or
buffers approved for impact under this Certification Approval and Authorization
Certificate. A sample deed notification can be downloaded from the
401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetiands. The text of
the sample deed notification may be modified as appropriate to suit to this
project.
17 Turbidity Standard
The turbidity standard of 10 NTUs (Nephelometric Turbidity Units) shall not be
exceeded as described in 15 A NCAC 2B. .0200. Appropriate sediment and
erosion control practices must be used to meet this standard.
18. No Sediment and Erosion Control Measures in Wetlands
Sediment and erosion control measures shall not be placed in wetlands or waters
to the maximum extent practicable. If placement of sediment and erosion control
devices in wetlands and waters is unavoidable, they shall be removed and the
natural grade restored within six months of the date that the Division of Land
Resources or locally delegated program has released the project.
Haywood County:
Page 6 of 6
June 28, 2005 .` -
Violations of any condition herein set forth may result in revocation of this Certification
and may result in criminal and/or civil penalties. The authorization to proceed with your
proposed impacts or to conduct impacts to waters as depicted in your application and
as authorized by this Certification, shall expire upon expiration of the 404 or CAMA
Permit.
If you do not accept any of the conditions of this Certification (associated with the
approved wetland or stream impacts), 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, which 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 Cyndi Karoly in the
Central Office in Raleigh at 919-733-9721 or Mr. Kevin Barnett in the DWQ Asheville
Regional Office at 828-296-4657.
Sincerely,
Alan W. Klimek, P.E., Director
Division of Water Quality
AW K/khb
Enclosures: GC 3367
Certificate of Completion
Guidelines for Riparian Buffer Restoration
cc: Ken Futreal, Southwestern NC R & D Council
367 Deliwood Road
Building E, Suite 3
Waynesville, NC 28786
USACE Asheville Regulatory Field Office
DWQ Asheville Regional Office
DLR Asheville Regional Office
File Copy
Central Files
Filename: 05-1113. EW P. BurnettCove-EastForkPigeonRive r.Approval
N
Deiailsl„ Detalls2. Permits and Certs Cross Refs ,:Impacis l A4itlgailons Fees Attillatlons Etenjs_. InspeC6ons Comm the History:
Project Number. 20051113 ! Version: 1 Status: Received Last Action Desc. Application sentto Region
Project Name: '.Haywood County Ewp E Frk Pigeon River Burnett r Project Type: Other PnmaryCount{ Haywood
I 'Type `Number 'StatutoryDate Issued Date Comments:
General 401 General iGC0003367 0MU2005 0612812005_
X404 Nationwide NW37I- i.. 1`3sued-ARO-KH9
i
I
__'..._.__..___-? -'-Nu--mbe-ber --Stat- ---
Individual Typ e 'utory Date' Issued Date
er 'Butter Rule `Action Statutory Date Issued Date ;EMC Hearing Date
., I - ----- _..
BUM Gose
Ready SID.VVPPc
Triage Check List
FILE COPY Project Name: Haywood County EWP
Date: 06/23/05
Burnett Cove & Fork Pigeon River
DWQ#: 05-1113
County: Haywood
Kevin Barnett, Asheville Regional Office
To:
60-day Processing Time: 6/22/05 to 8/20/05
From: Cyndi Karoly Telephone : (919) 733-9721
The file attached is being forwarded to your for your evaluation.
Please call if you need assistance.
R Stream length impacted
E:i Stream determination
Wetland determination and distance to blue-line surface waters on USFW topo maps
Minimization/avoidance issues
Q Buffer Rules (Neuse, Tar-Pamlico, Catawba, Randleman)
Pond fill
Mitigation Ratios
El Ditching
? Are the stream and or wetland mitigation sites available and viable?
Check drawings for accuracy
Is the application consistent with pre-application meetings?
Cumulative impact concern
0
R
Comments: As per our discussion regarding revision of the triage and delegation processes,
please review the attached file. Note that you are the first reviewer, so this file will need to be
reviewed for administrative as well as technical details. If you elect to place this project on hold,
please ask the applicant to provide your requested information to both the Central Office in
Raleigh as well as the Asheville Regional Office. As we discussed, this is an experimental, interim
procedure as we slowly transition to electronic applications. Please apprise me of any
complications you encounter, whether related to workload, processing times, or lack of a "second
reviewer" as the triage process in Central had previously provided. Also, if you think of ways to
improve this process, especially so that we can plan for the electronic applications, let me know.
Thanks!
Mr. McLendon and Ms. Karoly
June 14, 2005
Page 2
We have carefully incorporated all the comments received during that consultation with the agencies and believe we
have captured the issues noted in reviewing this essential stream repair work. Please note we have included within
the construction sequence, amussel survey and,.ifneeded,.relocation rffort.prior to commencing construction- This
was specifically suggested by the USFWS and NC WRC representatives at the June 2ond site review meeting. We
have provided significant other measures to limit any impact that this work may have on habitat or any organisms in
the stream areas affected by this work. This mussel protocol is provided with the understanding that it would be
done only if USFWS requires this process as part of their "consultation" to meet Section 7 of the Threatened and
Endangered Species Act.
Frankly, we believe that the ongoing water quality impacts of these damaged and exposed stream bank areas
represent a great threat to downstream waters and the habitat associated with the identified endangered AE, not to
mention the hazard they represent to properly near the sites. We believe that the repair plans developed for these
sites are comprehensive and represent well thought-through consideration of the existing water quality problems and
will result in effective management of any "short term" impacts during the construction phase, even without the AE
survey/relocation protocol.
We are looking forward to being able to proceed with this work. Please let me or our coordinator for this project,
Mr. Ken Futreal (828.400.3279) know of any issues or consideration that we need to make to secure approval for
this planned work. In accordance with the contact we have made with DWQ's regional 401 contact, Mr. Keven
Barnett, we have submitted directly to him his copy of these repair plans and applications. In addition, since the
State of North Carolina has "waived" fees for these EWP 401s, we have not included any permit fees. Thank you
for your attention to these applications.
4.C
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Sincere
.mac v'?? a Horto
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CJH:bdr
Enclosures
cc: Ken Futreal
Office Use Only: py Version October 2001
USACE Action ID No. DWQ No.
If any particular item is not applicable to this project, please enter "Not ApPVble" or "N/A" rather than
leaving the space blank.
L' Processing
1. Check all of the approval(s) requested for this project:
Section 404 Permit
Section 10 Permit
401 Water Quality Certification
? Riparian or Watershed Buffer Rules
2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 37
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: Haywood County - Jack Horton, County Manager
Mailing Address: County Courthouse
215 N. Main Street
Waynesville, North Carolina 28786
Telephone Number: 828-452-6625 Fax Number:
E-mail Address: ihorton@haywoodnc.net
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: Ken Futreal
Company Affiliation: Southwestern NC RC&D Council .
Mailing Address: 367 Dellwood Road
Building E, Suite 3
Waynesville, N.C. 28786
Telephone Number: 828-400-3279 Fax Number: 828-452-7031
E-mail Address: kfutreal@yahoo.com
Page 5 of 12
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: Haywood County Emergency Watershed Protection Program (HC-103)
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 8654618359-Burnett Cove-Mike Lewis
4. Location
County: Haywood Nearest Town: Waynesville
Subdivision name (include phase/lot number):
Directions to site (include road numbers, landmarks, etc.): Intersection of NCSR 276 and
SR 1104.
5. Site coordinates, if available (UTM or Lat/Long): 35d27m6.5s / 82d50m18s
(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:
Land use is camping type facilities on the south side and residential homes on the north
side of the river. A large pond is adiacent and is used for fishing purposes.
7. Property size (acres): 10.8 ac.
i
8. Nearest body of water (stream/river/sound/ocean/lake): East Fork Pigeon River
9. River Basin: French Broad River
(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/.)
Page 6 of 12
10. Describe the purpose of the proposed work: Streambank repair and stabilization. When
possible excavation equipment (backhoe) will access deposition areas from the
streambank and not encroach into the stream channel. A portion of this site includes
steep eroded streambanks adjacent to the deposition areas and the deposit material can
be used as backfill to stabilize the streambank. The work described in this Stream
Repair and Bank Stabilization Plan (Repair Plan) is urg,ent and compelling, work under
the National Resource Conservation Service (NRCS)-Emerg,ency Watershed Protection -
(EWP) program to protect existing, property and structures.
11. List the type of equipment to be used to construct the project: Excavators, dozers and
dumptrucks.
12. Describe the land use in the vicinity of this project: residential, agricultural and
recreational.
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 future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application:
None anticipated
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
Page 7 of 12
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
_ 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***__..
* 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.cov.
*** 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:
Total area of wetland impact proposed:
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?
(please secif )
I Fill and
excavation 500 East Fork Pigeon River 50 Perennial
2 Fill and
excavation 150 East Fork Pigeon River 50 Perennial
* 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.us_*s.1()V. Several intemet sites also allow direct download and printing of USGS maps (e.g., www.tonozonc.com,
www.mapouest.com, etc.).
Page 8 of 12
Cumulative impacts (linear distance in feet) to all streams on site: 750 If
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*
act
;(a of
es)
Name of Waterbody
(if applicable) Type of Waterbody - -
(lake, pond, estuary, sound,
bay, ocean, etc.)
List each impact separately and identity 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 streambank on the south side needs to be repaired and restored to avoid continued
sedimentation and future destruction of property. Restoring the channel to the pre-storm
conditions and stabilizing the streambanks will provide the appropriate protection against
future high water storm events. Access for this repair work is easily accomplished with the
gravel bar adjacent to the river. When at all possible, equipment will be kept out of the
stream channel, stream crossings will be minimized. When at all possible, backfill material
will be moved from dry areas to banks, minimizing the movement of wet (stream)
material.Temporary and permanent herbaceous vegetation shall be planted on all bare
soils within 15 davs of ground disturbing activities.
Page 9 of 12
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:/fh2o.enr.state.nc.us/ncwet]ands/sti-mgide.html.
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.
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://h2o.enT.state.nc.us/wrn/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 10 of 12
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian 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 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 (919) 733-5083 to review current thresholds for environmental documentation.
Yes ? No JZ
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 (3 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
T cone i extenas out .w reet perpendicular from near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
Page I 1 of 12
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.
XII. Sewage Disposal (DWQ Only)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
XIII. Violations (DWQ Only)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No Z
Is this an after-the-fact permit application?
Yes ? No ?Vl
V?J
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).
Due to Federal regulations re2ardinlz the use of EWP, fundinIZ construction of all EWP
work must be under construction by September of 2005
Ap Agent's ignature "Date
(Agent's sib re is valid only if an authorization letter from the applicant is provided.)
Page 12 of 12
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McGill
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CONSULTING ENGINEERS
ASHEUILLE, NORTH CAROLINA
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STREAM REPAIRS & BANK STABILIZATION PLAN FOR
Burnett Cove Site
Haywood County, North Carolina
Zab
14-
Prepared for
HAYWOOD COUNTY
,SEAL
027788
J.
Prepared by:
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Mc Gill
ASSOCIATES
June S, 2005
In conjunction with:
• Soil & Environmental Consultants
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Burnett Cove - Stream Repairs & Bank Stabilization. Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
1. PROJECT PURPOSE & DESCRIPTION
The purpose of this project is to stabilize and/or repair eroded and unstable stream banks
along the East Fork of the Pigeon River that were impacted by flood flows from
Hurricanes Frances and Ivan in September of 2004. The severely eroded stream banks
consist of exposed soil on moderate to steep slopes and extensive woody debris, which, if
transported during another high flow event, could block downstream culverts and bridges
as well as cause increased erosion and sedimentation in vulnerable High Quality waters.
As desired by the landowner(s) and charged to us by Haywood County, NC, the proposed
design is intended to reconstruct the damaged bank(s) as "close as possible" to the
original pre-disturbance conditions. This site, while not within a designated Critical
Habitat for the Appalachian Elktoe Mussel (Alasmidonta raveneliana) (AE) zone, is
located upstream of a portion of the Pigeon River (downstream of the confluence of the
east and west forks) that is designated CH. Accordingly, it is important that the
appropriate construction methods (including erosion and sediment control practices) be
utilized during the repair construction at the Burnett Cove site to protect downstream
habitat. The continued sedimentation occurring from this damaged site is an ongoing
impact to the downstream waters and its careful, quick repair is critical to protecting
stream resources.
The work described in this Stream Repair and Bank Stabilization Plan (Repair Plan) is
urgent and compelling work under the National Resource Conservation Service (NRCS)
Emergency Watershed Protection (EWP) program to protect existing property and
structures. NRCS is the funding agency and Haywood County / Haywood Soil and
Water Conservation District (SWCD) is the sponsor and responsible party for the project.
Work on the site consists of repair and stabilization effort only, and is not considered
natural channel restoration or enhancement work. However, some methods and
approaches utilized in the proposed repairs are routinely applied in natural channel design
efforts due to their ability to protect channel banks from shear stresses and the resultant
erosion.
All work in or near surface waters will be fully supervised by trained personnel from both
McGill Associates and Soil & Environmental Consultants (S&EC). This site is just one
of seventeen (17) similarly damaged sites selected for repair within Haywood County as
part of Haywood County bid invitations HC-102, HC-103, and HC-104. Each of the sites
is considered independent of one another (non-contiguous) due to the physical separation
typically in excess of several thousand feet between sites.
2. SITE DESCRIPTION
Site #1 - Burnett Cove Area Site - East Fork of the Pigeon River (WS-III, Tr Waters) -
The repair site is approximately 900 feet in length and is located along the East Fork of
the Pigeon River in Haywood County, NC. This area is located just downstream of an
NCDOT maintained bridge which allows passage to SR 1104 immediately south of NC
Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
276. Please refer to repair plans for photographs, mapping, imagery, and details of
existing site conditions.
Approximately 600 feet of the left channel bank (left and right are referenced looking
downstream) was severely damaged through the creation of the "cut through" of
unconsolidated rocky floodplain material between the river and the pond and into an
existing off-line pond immediately south of the river. This section of the repair was
previously repaired (work performed by others) by the property owner, Mr. Mike Lewis
(and wife Lori), to separate the pond from river flows and restore access to the property.
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Banks along this portion of the repair reach range in height from roughly 4 to 6 feet and
are near vertical in some locations. Based on a review of available mapping and imagery,
the repaired bank is located in its approximate pre-damage location. Some portions
appear to have been over-constructed while other portions appear short of their pre-
damage location.' There is little or no soil material available on the bank to provide a
planting media. Limited rocky debris deposition was observed in the active channel.
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The remaining 300 feet of repair is located immediately upstream of the bridge along the
right bank. This property is owned by Mrs. Irene Haynes. We understand from our site
visits and surveys that portions of three conventional septic systems were damaged (or
lost) during the events that lead to bank failure. Repairs to these systems are not a part of
the EWP work and are the responsibility of the property owners through consultation
with the Haywood County Health Department. The right abutment of the bridge and
northern portion of SR 1104 also sustained significant damage during the hurricanes and
required emergency repairs by NCDOT.
Banks along this portion of the repair reach range in height from roughly 10 to 13 feet
and are also near vertical along much of the reach. Based on a review of available
mapping and imagery, the width of bank loss varies from 15 feet to as much as 50 feet
along this portion of the repair reach. No repairs have been performed along this portion
of the repair reach. Little to no available repair materials exist along this portion of the
reach.
Access to the site is not an issue as the site entrance is located on SR 1104. Where
visible, site utilities were located as described on the site repair plan. Utilities must be
located and marked by contractor prior to construction. The disturbed area for the
proposed repair and stabilization is 0.50 acres, and is exempt from an Erosion Control
Permit from Land Quality. The Burnett Cove site work described in this plan will need to
be permitted by the U.S. Army Corps of Engineers (Section 404 permit) and the NC
Department of Environment and Natural Resources, Division of Water Quality (Section
401 Water Quality Certification).
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
3. TECHNICAL REPAIR DESCRIPTION
On April 1, April 13, and May 19, 2005, members of our design team visited the repair
site to review current site conditions and perform a general site characterization. While
on site, we observed characteristics of the site and surrounding area, verified surface and
channel flow conditions, and observed existing property boundaries, select utilities, site
accessibility, and existing water conveyance structures. During this process, we observed
exposed eroded banks along the repair reach (which were caused by the hurricanes) to
typify failed bank height, slope, materials, vegetation, and general site conditions.
While on site we also observed existing channel banks immediately upstream and
downstream of the repair area as well the existing channel banks on the opposite side of
the watercourse (in most cases only one bank of the existing channel was damaged).
Utilizing GPS and laser-level (or Total Station) equipment, we collected select site data
to locate the extent of the damage and characterize the existing conditions along the
repair reach. We field measured one or more bank cross-sections while on site. The
cross-section(s) location were selected to typify the existing bank condition along the
repair reach. A plan sketch of the existing site conditions along typical cross-section(s)
taken along the repair reach is shown in the Repair Plans.
We discussed the site conditions (including a description of pre-damage site) with the
landowners (Mr. Lewis and Mrs. Haynes). We photographed the project sites and
prepared field notes for use in the preparation of our design.
After completing our field visits, we performed a preliminary review and evaluation of
available site mapping to include USGS 7.5 Minute Quad data, Digital Orthophoto Quad
(DOQ) data (1998), Color Infrared imagery (2004), Haywood County Soils Survey map
sheets, as well as other available map data. Using Arc-GIS (with available extensions)
and Digital Elevation Models (DEM) from the NC Floodplain Mapping Project we
estimated the contributing drainage area (at the project site) at approximately 43.5 square
miles. We also researched available hydrologic and hydraulic data for the project site,
including a review and evaluation of available Regional Curve data (NCSU - Stream
Restoration Institute (SRI), Preliminary Mountain Curve) for incorporation into the repair
design process as applicable.
visits we developed a rough site sketch defining
Using the data collected during our field g
existing conditions with annotated hand notes, descriptions, and repair recommendations.
These notes were later refined for use in the development of our repair "concept" for the
site roughly defining the locations, sizes, and types of modifications and features
proposed for construction at the, site. This "concept" was later discussed on site with
representatives of Haywood County, reviewing Agencies (typically including USACE,
NCDENR-DWQ, NCWRC, U.S. Fish & Wildlife, and NRCS.) and the landowners to
solicit input and gain concurrence of our design approach. Since our site meetings, we
have incorporated Agency concerns and comments into our plan. Due to the sensitivity
of the designated AE Critical Habitat within Haywood County we have paid special
attention to this topic in an attempt to provide short and long term protective measures for
Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
this Federally Endangered Species. These measures are addressed in detail later in this
report.
In addition to the Existing Site Plan, we also developed our Proposed Repair Plan
including plan 'view, typical repaired bank cross-sections, construction details for typical
site features, technical construction specifications, and planting recommendations for the
recommended repairs.
4. DESIGN CONSIDERATIONS
As described in our technical proposal, we considered a range of possible repair
alternatives for the Burnett Cove site. These repair alternatives included: 1) Repair-in-
Place Only, 2) Repair-in-Place augmented with In-Stream Structures, 3) Stream
Restoration - "Natural Channel Design."
As our understanding of this and other repair sites has increased, and in an effort to
streamline the approach to repairs we further developed these repair alternatives. In our
design development we strived to utilize techniques which would be simple and
understandable to a "typical" general contractor (reducing the need for specialty
contractors) and which could be easily modified or refined in the field by the designer (or
contractor) based on site conditions encountered during construction. It was also our
intent that repair and stabilization methods would be constructed with commonly used
and readily available construction materials.
Recommended repairs have been designed with robust methods to withstand typical
channel discharges and erosive channel forces. One commonly observed approach to
such bank repairs includes a complete lining of repaired banks with large boulders or
riprap. It is our opinion that such an approach would be undesirable for three main
reasons. 1.) These repairs do not take into account the primary reason for the damage in
the first place, that of excessive shear stresses on the bank and tend to serve as a "band-
aid" approach to bank repairs. 2.) Such repairs utilize excessive volumes of rock
resulting in considerably high repair costs. 3.) The placement of large volumes of rock
for continuous lengths in effect "armors" the banks and fails to provide the desired
(reconstructed) habitat that previously occurred naturally within the system (boulder,
cobble, gravel substrate materials) bed and banks. Such habitat is key to a variety of
aquatic species (including the AE mussel).
Our selected repair alternative for the site includes repairing the failed bank back to its
pre-disturbance location (through fill placement) and augmenting the repair with in-
stream structures. The proposed repair plan calls for the utilization of off-site borrow
materials including river bed borrow consisting of sand, gravel, cobble, and small
boulders for the reconstruction of the lower bank zone. Elevations above the lower bank
zone will be constructed utilizing varying fill materials including both river bed borrow
and other suitable borrow sources.
Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
Based on the observed (and measured) condition of the failed bank and the amount of
disturbance that has occurred, the bank repair alone (without supplemental in-stream
structure reinforcement) would likely be insufficient to withstand future flood flows. The
installation of in-stream rock (boulder) structures will reduce near bank stresses along the
repair reach to protect the rebuilt banks. Additionally our repair calls for the installation
of toe stabilization as necessary along the reach in areas of excessive scour to tie-in to
existing stabile banks. The designer may also designate other areas requiring toe
stabilization at the time of construction.
This approach to bank repairs will improve the overall potential for the success of the
repair. The installation of structures will protect channel banks with a significantly
smaller rock volume (when compared to bank lining) thereby reducing overall repair
costs. One additional benefit to this type of repair is the replacement of a natural (less
structural) repair that is more appropriate for the reach and generally more aesthetically
desirable.
i 5. PROPOSED REPAIR PLAN
During our evaluation of the site, infrared imagery (2004) was used to estimate the pre-
disturbance location of the "channel bank." This location was then used to develop a
repaired bank location as shown in our Repair Plan. Typical cross-section(s) for the
repair were then developed to depict proposed repair characteristics including but not
limited to slopes and slope breaks, stabilization methods, and planting recommendations.
NOTES:
1. Our repair plan is designed to repair and stabilize the banks along the subject
reach and is not considered natural channel restoration or enhancement work.
And, while consideration was given to select characteristics of the channel it
should be recognized that a complete morphological evaluation of the repair
reach was not performed nor does this report (or repair) represent such an
evaluation. However, some methods and approaches utilized in the proposed
repairs are routinely applied in natural channel design efforts due to their ability
to protect channel banks from shear stresses and the resultant erosion.
2. It should be noted that this "channel bank" location and the resultant "channel
width" is not to be considered the bankfull channel edge or bankfull width (as is
routinely described in Natural Channel Design Methodology), nor should it be
considered the "edge of water" as this location will differ for various reasons. It
is however, a rough interpretation (estimate) of the pre-existing channel bank
location based on the best available pre-damage site and mapping data,
discussions with landowners, observation of undisturbed channel segments
immediately upstream and/or downstream of the site, and experience on similar
projects.
Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
3. Due to previous alterations of the channel including but not limited to bridge
construction, bank grading, the construction of flood levees, and in-channel
quarry, operations, channel banks, widths, and slopes have been modified
considerably. In turn, the identification of the "natural" condition (dimension,
pattern,' and profile) of the channel is often difficult or indeterminate.
For comparison purposes we attempted to confirm our "channel bank" location by
comparing the resultant "channel width" to available Regional Curve data. Based on a
review of site data (upstream and/or downstream) and our estimated "channel bank"
location, we estimated the pre-disturbance "channel width" at approximately 75 feet. We
compared this "channel width" to estimated bankfull width as determined from available
(preliminary) mountain Regional Curve data (SRI) for the appropriate drainage area. The
regional curve indicates a bankfull width of approximately 80 feet based on a drainage
area of 43.5 square miles. Based on this comparison it is our opinion that the estimated
pre-disturbance "channel location" is appropriate.
As shown on the attached repair plans and design details, we recommend that the
repaired slope be reconstructed and backfilled with excavated channel material (or
deposited material recovered from the floodplain), available on-site or off-site earth fill,
and in some cases imported stone aggregate. The location of the toe of the repaired slope
will be field determined to allow for the development of a typical repair application along
the reach. Our Repair Plan calls for the incorporation of two repair options, Option 1 and
Option 2 as shown on Sheet A7. Both repairs are similarly constructed; however, Option
2 calls for the construction of an intermediate bench at approximately midway up the
repaired bank. We propose the use of repair Option 1 along the upstream right (high)
channel bank along the property belonging to Mrs. Haynes. We propose to use Repair
Option 2 along the downstream left (low) channel bank belonging to Mr. and Mrs. Lewis.
See the proposed repair cross-sections depicted in the Repair Plan.
Repair Option 1
For Repair Option 1, our design has divided the repaired bank into three bank
zones, Upper, Mid-, and Lower for the purposes of slope, stabilization measures,
and planting recommendations. A bench (small floodplain) will be constructed
between the Lower and Mid-Bank Zones.
Grading & Stabilization
We recommend that the Lower Bank Zone be graded (or constructed) with the
previously described materials at a slope of not in excess of 2H:1 V to the
approximate elevations described in the repair cross-section. As this zone is
within the "active channel" we recommend that it be lined with CF-7 (coir fiber)
erosion control matting (or equivalent), planted with live stake (cuttings) of the
species and density described in the planting details. This zone should be over
seeded with the appropriate temporary and permanent grasses for the season.
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
Repair Option 1 will include the construction (or grading) of a bench (or small
floodplain) extending landward from the elevation break-point between the Lower
and Mid-Bank Zones (Proposed Slope Break). The width of this bench will
depend on the available area (based on landowner desires and site constraints) and
the necessary cut volume. However, a minimum bench width of 5 to 10 feet is
desired. The back of this bench should then be graded and tied to the existing top
of bank (floodplain or terrace) elevation at a slope not greater than 3H:1V as
described below as the Mid-Bank Zone. The upstream and downstream ends of
the bench will be graded to blend smoothly with the existing undisturbed banks.
The Mid-Bank Zone should be similarly graded (or constructed) with the
previously described materials at a slope of not in excess of 3H:1 V to the
approximate elevations described in the repair cross-section. As this zone is out
of the "active channel" we recommend that it be lined with excelsior (wood fiber)
erosion control matting (or equivalent), planted with select shrubs (bare root or
containerized specimen) of the species and density described in the planting
details. This zone should also be similarly over seeded with erosion control
grasses. Where possible, transplanting of woody vegetation from on-site
including root mats will be performed to assist in the stabilization of banks within
the bench, Lower, and Mid-Bank Zones.
NOTES:
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1. The elevations described in the repair cross-section are typical and
intended to describe existing and repaired bank conditions at a location
coincident with the measured field cross-section.
2. The vertical datum to which this is applied (existing top of bank) and the
vertical and horizontal distances depicted in the repair cross-section are
typical and should be verified and adjusted as necessary along the length
of the repair reach.
3. The Proposed Slope Break depicted on the Repair Plan defines the
approximate location of the break between the Lower Bank Zone and the
streamside edge of bench (or Mid-Bank Zone as described later for Repair
Option 2).
The Upper Bank Zone should be graded (or constructed) with the previously
described materials such that it blends the Mid-Bank Zone with the surrounding
floodplain grade to the approximate elevations described in the repair cross-
section. As this zone is out of the "active channel" we recommend that it be lined
with excelsior (wood fiber) erosion control matting (or equivalent), planted with
select tree (bare root or containerized specimen) of the species and density
described in the planting details. This zone should also be similarly over seeded
with erosion control grasses.
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The attached Repair Plan generally describes the number and type of in-channel
structures to be installed. The designer will determine the exact spacing, length,
and location of the in-channel structures at the time of construction. For planning
purposes, we estimate that a minimum of four (4) rock (boulder) vane arm
structures will be installed along the repair reach. A detail of a rock vane arm
structure is shown in the Construction Drawings.
Toe Stabilization Measures
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
In-channel Structures
As previously described we recommend that the repaired channel bank be
augmented with in-channel structures including rock (boulder) vane arms. These
structures will be utilized to reinforce and stabilize the proposed bank repairs. All
structures will be constructed out of natural materials typically consisting of
locally quarried boulders. The upstream side of these structures will be lined with
a non-woven fabric and backfilled with excavated channel material and in some
cases imported stone (off-site river bed borrow materials or other available coarse
aggregate if approved by the designer) to improve stability and reduce the
potential for piping.
These in-stream structures concentrate stream energy toward the center of the
channel and away from the near-bank areas. In doing so, the structure reduces
shear stress along the banks and prevents bank erosion. (In this case, such
structures allow for an additional measure of protection of the repaired bank until
vegetation can take hold). This approach would also likely reduce the overall
volume of stream stabilization material that must be hauled to the site and reduce
costs for the overall repair.
Depending on conditions encountered during construction, occasions may arise
where supplemental stabilization of the bank toe is necessary. Where such
conditions are encountered, banks would be reconstructed using rows of large
boulders along the newly defined toe of the repaired bank. Footer rocks
(boulders) and toe rocks (boulders) will be installed as shown in the details. In
these cases, the landward side of these structures will be lined with a non-woven
geotextile fabric and backfilled with suitable material (off-site river bed borrow
materials or other available coarse aggregate if approved by the designer). This
material combination in conjunction with a more suitable slope (likely not in
excess of 2H:1 V) will improve stability and reduce the potential for future scour
and piping (and resulting failure).
The exact location and extent of toe stabilization measures will be determined by
the designer at the time of construction, however areas typically in need of such
supplemental protection include areas of existing scour (where sub-grade
reconstruction would be difficult), near existing large diameter trees (having
experienced undercutting) which are to be maintained, and at the upstream and
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
downstream repair limits (where tie-in to undisturbed banks is needed). For
planning purposes we have estimated that 40 to 50 percent of the repair reach will
require toe stabilization measures. A detail of a typical toe stabilization structure
is shown in the Construction Drawings.
Bank Plantings
A riparian buffer area will be established along the repaired channel bank as part
of the proposed Repair Plan. The riparian zone will include all three Bank Zones
(Lower, Mid-, and Upper) and any constructed bench. These areas will be seeded
and planted with the appropriate native riparian vegetation and will provide
channel stability and treatment of surface waters traveling laterally through the
buffer.
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Species will consist primarily of native trees and shrubs. The repaired bank will
be planted with the appropriate channel bank species in the form of live stakes,
bare-root seedlings (and containerized plants), and transplants where available.
Native trees and shrubs that are available elsewhere on site will be removed with
as much of the root ball intact and transplanted adjacent to the restored channel or
in the floodplain. The majority of the planting efforts (with the exception of site
transplants) should be delayed until the fall season to increase survivability.
Vegetation will be supplied by locally identified plant sources or purchased from
local, reputable nurseries. Other sources, outside of the local area, may be used
depending on the availability of plant material and as approved by the designer.
Tree species individuals will be planted randomly at an 8 ft. by 8 ft. spacing in
order to ensure a desired planting density of 680 stems per acre. This will
increase the potential for the desired 5-year survivability density of at least 260
stems per acre. The planting plan will include a minimum of five of the nine tree
species listed in the planting schedule. Plants shall be installed as shown in the
planting details. Tree protection shelters shall be installed on all planted bare-root
seedlings.
Shrub species will be planted at a higher density and closer spacing (6 ft. by 6 ft.) to
achieve a desired planting density of approximately 1,200 shrubs per acre here
again improving the potential for the desired 5-year survivability. The planting plan
will include a minimum of three of the seven shrubs listed in the planting schedule.
Live stakes are specified and will be planted on a spacing of 3 ft. by 3ft.
consisting of Black Willow, Silky Willow, and Silky Dogwood species randomly
intermixed. Live stakes will be cut and installed as shown in the planting details.
Representatives of S&EC and McGill Associates will be on site to observe and
direct planting efforts associated with the buffer restoration. Substitution of tree,
shrub, and live stake species must approved in advance by the designer.
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
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Temporary and/or permanent seeding measures (German millet, rye grass, or the
most appropriate erosion control grass as dictated by the season or region) will be
applied to areas disturbed during grading operations to allow for localized
stabilization while riparian species establish themselves.
Repair Option 2
Repair Option 2 is similarly divided into three repaired bank zones however it
does not include the construction of a bench. The Lower Bank Zone will tie into
the Mid-Bank Zone as depicted in the Proposed Slope Break depicted on the
Repair Plan.
In-channel structures and toe stabilization measures will also be utilized to
augment the bank repairs in Repair Option 2. They will be installed and located
similarly to those described above.
Planting of the zones of Repair Option 2 are similar to those described above for
r Option 1.
Construction Drawings for the proposed Stream Repair and Bank Stabilization Plan
including the existing site conditions, the proposed repairs, a construction sequence,
repair cross-sections, structure details, erosion and sediment control details, and a
planting schedule and details are attached. Technical Specifications are also attached.
6. APPALACHIAN ELKTOE MUSSEL CONSIDERATIONS
As identified and described by the US Fish and Wildlife Service , a population of the
federally endangered Appalachian elktoe mussel (Alasmidonta raveneliana) (AE) is
known to exist in the Pigeon River subbasin in Haywood County, NC. Critical Habitat
has been designated for this species along a significant length of the West Fork Pigeon
River and the main stem of the Pigeon River (below the confluence and above Canton).
In light of this matter, the USDA Natural Resources Conservation Service (MRCS)
previously engaged The Catena Group (TCG), a team of freshwater mussel experts from
Hillsborough, NC, to survey a series of reaches along these waters for which stream
repairs and bank stabilization efforts are proposed. Subsequent to their site visits, TCG
prepared a report (Freshwater Mussel Survey Report for the NRCS Restoration Efforts on
the Pigeon River, TCG, April 19, 2005) describing the surveyed species, habitat
characteristics, species threats, and the methodologies and results of their field surveys.
As previously described, of major concern to NCRS (as well as landowners) is the
continued bank erosion occurring along this repair reach and other sites (identified and
yet unidentified) within Haywood County. Without repair, the likelihood of continued
bank erosion and resultant local (and downstream) deposition is high. This erosion will
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continue to affect the quality of system waters in addition to downstream aquatic and
riparian habitat well beyond what has already occurred. The TCG report also describes
known threats to the AE species and their contribution to the decline in the population.
These threats include sedimentation, point and non-point source pollution, and habitat
modification (impoundments, channelization, etc.). The report describes sedimentation
(siltation) as a "major contributing factor to the degradation of mussel populations."
The purpose of these surveys was to identify mussel populations (or individuals) within
the subject repair reaches and provide recommendations regarding future repair efforts
within these waters. As described in the report, surveys extended from a point
approximately 100 meters upstream of the repair area to a point approximately 400
meters downstream of the repair area. According to the report, surveys were conducted
through these lengths in areas of the "best" potential AE habitat (based on the surveyors
understanding of the desired habitat). Additionally the report also notes "....Some areas
within these parameters were determined not to contain potential mussel habitat due to
their level of degradation...."
Of the seventeen stream repair and bank stabilization sites in Haywood County, only five
(5) are located in designated Critical Habitat. This site is not in designated Critical
Habitat and therefore was not included in the field surveys. However,
recommendations described in the report prepared by TCG are recommendations for
construction operations and general measures to be considered for all repair sites.
Although not in Critical Habitat it is our opinion that these measures are important and
suitable for inclusion our plan. These measures include:
1. Install and maintain erosion control devices throughout the project site and take
all other appropriate measures to avoid excessive turbidity and sedimentation.
2. Only conduct in-stream activities during periods of low flow. Cease construction
during high water or rain events.
3. Construction activities to be conducted in the least amount of time practicable.
4. Construction staging sites should be located outside of flood prone areas.
5. Immediately (as soon as possible) re-vegetate construction/access areas with
appropriate native flora after restoration efforts are completed.
:
6. Cut large downed trees into smaller, more manageable sections prior to removal
from site.
7. Minimize the cutting of living native vegetation from sites to include only
individual trees that are in imminent danger of falling into the river and avoid
heavy machinery contact with existing vegetation.
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We have incorporated the recommendations provided by TCG into our Stream Repair
and Stabilization Plan details and construction sequence. We have also included the
input and comments received from Mr. Mark Cantrell and Mr. John Fridell of the U.S.
Fish & Wildlife Service (USFWS) and Mr. Steve Fraley and Mr. Dave McHenry of the
NC WRC during our June 2, 2005, office meeting and subsequent site visit to other sites
(in designated Critical Habitat) within the Pigeon River subbasin. Specifically, we have
included the following additional measures to reduce potential short term (during
construction) and long term detriment to downstream AE Critical Habitat areas:
1. We have identified a single ingress/egress point along the repair reach. This
location, typically at the "low bank" location, was selected to reduce the overall
length and width of disturbance to the remaining stable bank, while restricting
equipment traffic to a single location thereby reducing the potential for additional
bank collapse and erosion and subsequent local and downstream sedimentation.
A detail for this ingress/egress access location is included in the plans. It is
intentionally similar to commonly applied temporary stream crossing methods
utilized during stream restoration projects.
2. We have called for the incorporation of temporary silt fence and temporary
diversion or interceptor swales (when possible based on topography) to reduce
the potential for overland flow (often sediment-laden) to be discharged over the
bank during or after construction. Such devices, while simple, will also reduce
the potential for concentrated flow to occur over the repaired banks until such
time as they are stabilized with ground cover (erosion control seeding measures).
3. We have identified in-channel "limits of disturbance" to be applied during
construction (for all sites within Critical Habitat designated areas). It is our
intent that this limit, extending not more than one-third of the original width of
the channel along the repair reach, will identify the sole zone of operation for
excavation (associated with in-stream structures and toe stabilization measures),
fill placement (for bank reconstruction), and equipment traffic. The designer will
define these "limits" prior to construction utilizing flagging, driven steel stakes,
buoys, or other methods such that the area and limits can be readily identified
during construction. This restricted traffic area will reduce the disturbed bed area
and reduce the potential for bed disturbance and downstream deposition of
disturbed materials.
4. General fill and grading operations will be performed under the observation of
representatives of S&EC and McGill Associates. As necessary, supplemental
erosion and sediment control measures will be employed (as site topography and
limitations permit) to protect existing surfaces from erosion and surface waters
from sediment loads associated with construction.
Technical Specifications included in our plan have called for the utilization of borrow
materials (including river bed borrow consisting of sand, gravel, cobble, and small
boulders) for the reconstruction of the lower bank zone. These materials typically
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
Haywood County Invitation # HC-103 McGill Associates, P.A.
contain few fines (including silt), their placement is less likely to affect the adjacent
waters in terms of sediment loads detrimental to the downstream AE mussel Critical
Habitat.
7. REGULATORY REQUIREMENTS
401 WATER QUALITY CERTIFICATION (Mandatory Requirements based on
expected Certification conditions) - The following mandatory conditions apply to all
repair sites:
1. Erosion & Sediment Control Practices
a. The erosion and sediment control measures for the project must be
designed, installed, operated, and maintained in accordance with the
most recent version of the North Carolina Sediment and Erosion
Control Planning and Design Manual.
b. The design, installation, operation, and maintenance of the sediment
and erosion control measures must be such that they equal, or exceed,
the requirements specified in the most recent version of the North
Carolina Sediment and Erosion Control Manual. The devices shall be
maintained on all construction sites, borrow sites, and waste pile
(spoil) projects, including contractor-owned or leased borrow pits
i associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must
be designed, installed, operated, and maintained in accordance with
the most recent version of the North Carolina Surface Mining
Manual.
d. The reclamation measures and implementation must comply with the
reclamation in accordance with the requirements of the Sedimentation
Pollution Control Act.
2. No Waste, Spoil, Solids, or Fill of Any Kind - No waste, spoil, solids, or fill of
any kind shall occur in wetlands, waters, or riparian areas beyond the footprint
of the impacts depicted in the Pre-Construction Notification. All construction
activities, including the design, installation, operation, and maintenance of
sediment and erosion control Best Management Practices, shall be performed so
that no violations of state water quality standards, statutes, or rules occur.
3. No Sediment & Erosion Control Measures w/n Wetlands or Waters -
Sediment and erosion control measures shall not be placed in wetlands or
waters to the maximum extent practicable. If placement of sediment and
erosion control devices in wetlands and waters is unavoidable, they shall be
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
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removed and the natural grade restored within six months of the date that the
Division of Land Resources has released the project.
4. 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 the attached
certificate of completion to the 401/Wetlands Unit, North Carolina Division of
Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699-1650.
5. Sediment and erosion control measures must be implemented prior to
construction and maintained on the sites to minimize sediment in downstream
areas. Seeding for a temporary cover of wheat, millet, or similar annual grain
or permanent herbaceous cover should occur on all bare soil within five (5)
days of ground disturbing activities to provide long-term erosion control. The
projects should be accomplished in stages instead of leaving large tracts
exposed to further storm events. Erosion control matting should be used in
conjunction with appropriate seeding on disturbed soils in steep slope and
riparian areas, unless authorized under Division of Land Resources Erosion
and Sediment Control approval. Matting should be secured in place with
staples, stakes, or, wherever possible, live stakes of native trees. Straw mulch
and tall fescue should not be used in riparian areas.
6. Only clean, large, angular rock, large woody material, or other natural stream
design materials and techniques should be used for bank stabilization. Rock
should not be placed in the stream channel in a manner that constricts stream
flow or that will impede aquatic life movements during low flow conditions.
Filter cloth should be placed behind large rock that is used for bank
stabilization. Properly designed rock vanes should be constructed wherever
appropriate on bank stabilization and channel realignment stream reaches to
improve channel stability and to improve aquatic habitat. Root wads should be
installed low enough in the bank so that a significant portion (at least one-
third) the root wad is inundated during normal flows.
7. The channel must be restored to a more stable condition. However, under no
circumstances should river rock, sand or other materials be dredged from the
stream channel under authorization of this permit except, if necessary, in the
immediate vicinity of the eroding banks for the explicit purpose of anchoring
stabilizing or flow/grade control structures or for reestablishing the natural
and more stable stream channel dimensions. Stream bed materials are
unstable in flowing-water situations and are unsuitable for bank stabilization.
Stream dredging has catastrophic effects on aquatic life and disturbance of the
natural form of the stream channel can cause downstream erosion problems.
The natural dimension, pattern, and profile of the stream upstream and
downstream of the permitted area should not be modified by widening the
stream channel or changing its depth.
8. Stabilization measures should only be applied on or near existing erosion
sites, leaving other stable stream bank areas in a natural condition. Grading
and backfilling should be minimized and tree and shrub growth should be
retained where possible to ensure long term availability of stream bank cover
for aquatic life and wildlife. Backfill materials should be obtained from
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
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upland sites except in cases where excess stream bed materials are available.
Berms are not permitted because they block the floodplain, constrict and
accelerate flood flows, and often fail or impede drainage during large flood
events.
9. Repairs to eroded banks should be conducted in a dry work area where
possible. Sandbags or other clean diversion structures should be used where
possible to minimize excavation in flowing water. Channel realignments
should be constructed by excavating the new channel from downstream to
upstream before connecting it to the old channel.
10. Heavy equipment should be operated from the bank whenever possible. All
mechanized equipment operated near surface waters should be inspected and
maintained regularly to prevent contamination of stream waters from fuels,
lubricants, hydraulic fluids or other toxic materials. Equipment used in stream
channel must be clean, new or low hour equipment.
11. As long-term stream stability is a concern with this type of work, it is strongly
recommended that woody vegetation be established along stream banks where
possible. Any riparian vegetation planting should be performed in accordance
with the Guidelines for Riparian Buffer Restoration.
12. Monitoring - The Permittee shall examine the stabilization work done under
this Certification on an annual basis for three (3) years following the
completion of the restoration efforts. This field evaluation should note the
condition and stability of the measures installed and how well the repair is
holding up. A written report must be provided to DWQ's Asheville Regional
Office by June 1 of each year. The report must describe inspection results,
include digital photographs, list the date of inspection, and describe any
needed repairs or corrections.
13. The permittee will provide on-site supervision of stability work including, but
not limited to bank re-sloping, in-stream structure placement, and riparian
zone re-establishment by an appropriately trained individual.
14. If pasture along the stream is to be used for grazing, the permittee must inform
the appropriate landowners that cattle should be prohibited from damaging
riparian areas and from de-stabilizing the stream banks and channel.
15. Diffuse Flow - All constructed storm water conveyance outlets shall be
directed and maintained as diffuse flow at non-erosive velocities through the
protected riparian zones such that it will not re-concentrate before discharging
into a stream.
16. Water Quality Certification Notifications - The permittee must provide a
copy of this issued Water Quality Certification and attached cover letter to
each property owner where the approved work will be performed.
17. Turbidity Standard - The turbidity standard (Nephelometric Turbidity Units)
shall not be exceeded as described in 15 A NCAC 2B..0200. Appropriate
sediment and erosion control practices must be used to meet this standard.
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Burnett Cove - Stream Repairs & Bank Stabilization Plan June 8, 2005
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Finally, pending receipt of a final 404 Permit and 401 Certification, copies of
these issued documents and the associated conditions and comments provided by
commenting agencies (when available) will be included in all final contractor
packages that will be used for construction of the repairs. All regulatory
requirements and the measures outlined in this document will be fully discussed
with the chosen contractor and the inspectors for McGill and S&EC before any
construction begins. During actual construction, inspectors will direct contractors
to observe and apply good construction practices and the requirements described
in this document.
i 17
Site # 1
Site Name BURNETTE COVE
Date Collected 4/12/2005
Stream East Fork Pigeon River
Assumed ground el evation = 100.00 feet
Dist. STA. BS HI FS
5.02 105.02
0
13
19
24
38
58
74
81
91
97
99
100
101
102
104
106
110
(relative)
Elevation Remarks
0+00 3.80 101.22 Lft. Edge of Road
0+13 3.75 101.27 Rt. Edge of Road
0+19 6.44 98.58
0+24 5.28 99.74
0+38 5.14 99.88
0+58 5.09 99.93
0+74 5.72 99.30
0+81 5.25 99.77
0+91 5.59 99.43
0+97 5.55 99.47
0+99 5.35 99.67 TOB
1+00 6.30 98.72
1+01 8.74 96.28
1+02 9.41 95.61 EOW
1+04 10.08 94.94
1+06 10.50 94.52
1+10 10.80 94.22 (approx.)
102.00
101.00
100.00
_ 99.00
c
98.00
d
w97.00
96.00
95.00
94.00
Typical Cross-section - Entire Reach
Site #1 - Burnette's Cove Site
0+00 0+20 0+40 0+60 0+80 1+00 1+20
Station (ft.)
TECHNICAL SPECIFICATIONS
FOR
?
STREAM REPAIRS & BANK
? STABILIZATION
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MAY 5, 2005
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TECHNICAL SPECIFICATIONS TABLE OF CONTENTS
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TITLE PAGE
TABLE OF CONTENTS
1.1 SECTION INCLUDES
1.2 SUMMARY OF WORK
1.3 WORKFORCE EXPERIENCE
1.4 SPECIFIC EQUIPMENT REQUIREMENTS
1.5 MEASUREMENT AND PAYMENT
SECTION 2 - TEMPORARY FACILITIES
2.1 SECTION INCLUDES
2.2 MEASUREMENT AND PAYMENT
2.3 TEMPORARY SANITARY FACILITIES
2.4 BARRIERS
2.5 TRAFFIC CONTROL
2.6 STAGING AREA
2.7 COORDINATION WITH OWNER AND OTHER
CONTRACTORS
2.8 PROTECTION OF EXISTING FACILITIES,
STRUCTURES, AND SERVICES
I
2.9
PROTECTION OF INSTALLED WORK
2.10 PROGRESS CLEANING AND WASTE
REMOVAL
2.11 EROSION CONTROL
2.12 FINAL CLEANING
SECTION 3 - QUALITY CONTROL
3.1 SECTION INCLUDES
3.2 MEASUREMENT AND PAYMENT
3.3 REFERENCES
3.4 CONSTRUCTION OBSERVATION
3.5 PLANTING OBSERVATION
3.6 SOIL TESTING
3.7 NOTICE REQUIRED FOR TESTING
SECTION 4 - SITE PREPARATION
i SECTION 4 - SITE PREPARATION 4
ii 4.1 SECTION INCLUDES 4
1 4.2 MEASUREMENT AND PAYMENT 4
1 4.3 UTILITY LOCATION AND PROTECTION 4
1 4.4 SEDIMENTATION AND EROSION CONTROL 4
1 4.5 CONSTRUCTION LAYOUT 4
1 4.6 CLEARING, GRUBBING, AND STRIPPING 4
1 4.7 DEWATERING 4
1 SECTION 5 - EXCAVATION 5
1 5.1 SECTION INCLUDES 5
1 5.2 MEASUREMENT AND PAYMENT 5
1 5.3 REFERENCES 5
1 5.4 PREPARATION 5
1 5.5 EXCAVATING 5
5.6 PLANTING PREPARATION 5
2 5.7 TOLERANCES 5
SECTION 6 - FILLING, BACKFILLING AND COMPACTION 6
2 6.1 SECTION INCLUDES 6
2 6.2 MEASUREMENT AND PAYMENT 6
6.3 REFERENCES 6
2 6.4 FILL MATERIALS 6
2 6.5 PREPARATION 6
2 6.6 BACKFILLING, FILLING, AND SURFACE
3 PREPARATION 6
3 6.7 COMPACTION AND QUALITY CONTROL 7
3 6.8 PROTECTION OF FINISHED WORK 7
3 6.9 TOLERANCES 7
3 SECTION 7 - CHANNEL PROTECTIVE LININGS AND IN-
3 STREAM STRUCTURES 7
3 7.1 SECTION INCLUDES 7
3 7.2 MEASUREMENT AND PAYMENT 7
4 7.3 REFERENCES 7
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7.4 GENERAL 7 9.10 PLANTING PERIODS 12
7.5 MATERIALS 7 9.11 REMOVAL OF NUISANCE VEGETATION 12
7.6 IN-STREAM STRUCTURES 8 9.12 WATER FOR PLANTINGS 12
7.7 CHANNEL PROTECTIVE LININGS 9 9.13 SUBMITTALS 12
7.8 SLOPE PROTECTION 9 SECTION 10 - PERMANENT SEEDING 13
SECTION 8 - STREAM BANK PLANTING 10 10.1 SECTION INCLUDES 13
8.1 SECTION INCLUDES 10 10.2 MEASUREMENT AND PAYMENT 13
8.2 MEASUREMENT AND PAYMENT 10 10.3 REFERENCES 13
8.3 REFERENCES 10 10.4 GENERAL 13
GENERAL 10 10
5 SEEDBED PREPARATION 13
8.4 .
8.5 PLANT STAKES AND CUTTINGS 10 10.6 SEEDING 13
ION 10 10
7 SEEDING DATES 13
8.6 PLANT SUBSTITUT .
8.7 PLANTING PREPARATION 10 10.8
0
9 SOIL AMENDMENTS
MULCH 13
13
8.8 STREAM BANK PLANTING 10 1
.
8.9 PLANTING PERIODS 10 SECTION 11 - SEDIMENT & EROSION CONTROL 14
8.10 REMOVAL OF NUISANCE VEGETATION 10 11.1 SECTION INCLUDES 14
8.11 WATER FOR PLANTINGS 10 11.2 MEASUREMENT AND PAYMENT 14
8.12 SUBMITTALS 11 11.3 REFERENCES 14
SECTION 9 - BUFFER PLANTING 11 11.4 MATERIALS 14
9.1 SECTION INCLUDES 11 11.5 SILT FENCE 14
9.2 MEASUREMENT AND PAYMENT 11 11.6 PUMP AROUND OPERATIONS 14
9.3 REFERENCES 11 11.7 SPECIAL STILLING BASINS 14
9.4 GENERAL 11 11.8 TEMPORARY SEEDING 15
9.5 CONTAINER GROWN PLANTS 12 SECTION 12 - SITE MAINTENANCE 16
9.6 BARE ROOT PLANTS 12 12.1 SECTION INCLUDES 16
9.7 PLANT STAKES AND CUTTINGS 12 12.2 MEASUREMENT AND PAYMENT 16
9.8 PLANT SUBSTITUTION 12 12.3 EXECUTION 16
9.9 PLANTING PREPARATION 12
111
SECTION 1 - GENERAL REQUIREMENTS
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1.1 SECTION INCLUDES
General requirements and information related to the work including,
summary of work, measurement and payment, and reference to
SPECIAL CONTRACT PROVISIONS.
1.2 SUMMARY OF WORK
The WILDFLOWER, PHASE I STREAM RESTORATION project
consists of the earthwork construction of a restored channel, floodplain
grading, and planting of the restored channel banks and surrounding
buffer area. Refer to the Construction Drawings and to these
Specifications for project details.
1.3 WORKFORCE EXPERIENCE
The contractor is required to have the appropriately experienced
personnel on site to operate equipment and insure that the construction
sequence and installation procedures are followed as determined by the
Engineer. Contractor personnel should be familiar with stream
restoration techniques and the correct method of installing in-stream
structures (i.e. rock and log j-hooks and cross vanes).
1.4 SPECIFIC EQUIPMENT REQUIREMENTS
The Contractor is required to have at a minimum two excavators with
hydraulic thumbs during the entire course of construction unless
otherwise approved by the Engineer. The hydraulic excavators must be
of sufficient size to lift, manipulate, and install boulders larger than 5-
foot by 4-foot by 3-foot (a maximum of 6 tons).
1.5 MEASUREMENT AND PAYMENT
All measurement and payment for services performed shall be as
indicated in the SPECIAL CONTRACT PROVISIONS. As such, they
are not defined in these technical Specifications.
END OF SECTION
SECTION 2 - TEMPORARY FACILITIES
2.1 SECTION INCLUDES
Required temporary facilities including site access, temporary sanitary
facilities, barriers, traffic control, construction staging area, Contractor
coordination, protection of existing facilities and installed work,
erosion control measures, and general site cleaning.
2.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
2.3 TEMPORARY SANITARY FACILITIES
Provide and maintain required sanitary facilities and enclosures. No .
permanent sanitary facilities exist at the project site.
2.4 BARRIERS
Provide barriers to prevent unauthorized entry to construction areas, to
allow for Owner and Engineer access to site, and to protect existing
structures and adjacent properties from damage due to construction
operations.
2.5 TRAFFIC CONTROL
Provide traffic control as required to protect the public safety.
Conform to all requirements of State, County, City, or local laws and
requirements for traffic control. Conformance with contract documents
does not relieve the Contractor from responsibility for public safety.
Construction operations may be underway on adjoining portions of the
site. '
2.6 STAGING AREA
The Owner will designate an area for staging of Contractor's
equipment and construction materials for the duration of construction.
This area shall be maintained so as to provide a sightly appearance and
a safe working environment. No other area shall be used for this
purpose without the approval of the Owner.
Storage of oil or fuel shall be confined to the construction staging area.
Refueling.of all vehicles and equipment shall occur only in the staging
area. Refueling of non-mobile equipment located outside of the staging
area will be allowed with Owner approval. No refueling shall occur
within fifty feet of the restored channel or any other surface water or
wetland. The Contractor shall take appropriate measures to ensure safe
fueling procedures are followed.
Contractor shall provide appropriate spill prevention measures. The
Contractor shall provide a spill containment plan for both the staging
area and the construction area. The plan shall include prevention,
containment, and control of fuel or oil spillage from equipment storage,
refueling, maintenance, and operation on site. The plan shall address
both mobile and non-mobile equipment used during construction.
Emergency spill cleanup equipment for oil and fuel spills shall be
stored on site. The Contractor shall notify the Owner and all applicable
agencies within 24 hours of any spill.
Stream Repairs & Bank Stabilization Page 1 Technical Specifications
Haywood County Stream Repairs May 2005
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2.7 COORDINATION WITH OWNER AND OTHER
CONTRACTORS
Perform coordination with Owner and schedule work to ensure limited
disruption of property access. Obtain approval from Owner prior to the
disruption of any access to site utilities, structures, or locations.
Coordinate the disruption of any utility services without regard to
duration. Provide continuous representation/point of contact for
Owner during all site activities. Access to construction site shall be
limited to the entrance designated on the plans. Only access points
approved by the Owner shall be used during construction.
2..8 PROTECTION OF EXISTING FACILITIES, STRUCTURES,
AND SERVICES
The project vicinity to include existing access routes will continue to be
used for daily operations by Owner where applicable. The Contractor
shall protect existing facilities, structures, and services throughout the
duration of construction and provide special protection where specified
in individual specification sections. Provide temporary and removable
protection for existing structures and services.
Control activity in immediate vicinity of facilities, structures, and
services to prevent damage. Any facility, structure, or services
disturbed or damaged, either intentionally or unintentionally, shall be
removed and reinstalled or repaired to the Owner's satisfaction.
Repairs to or replacement of facilities, structures, or services shall be
performed at the expense of the Contractor. Repairs and/or
replacement shall occur without additional cost to the Owner.
2.9 PROTECTION OF INSTALLED WORK
Protect installed work and provide special protection where specified in
individual specification sections. Provide temporary and removable
protection for installed work and products. Control activity in
immediate work area to prevent damage. Any installed work disturbed
or damaged, shall be removed and reinstalled or repaired to the
Engineer's satisfaction. Repairs to or replacement of installed work
shall be performed at the expense of the Contractor. Repairs and
replacement shall occur without additional cost to the Owner.
i 2.10 PROGRESS CLEANING AND WASTE REMOVAL
Maintain areas free of waste materials, debris, and rubbish. Maintain
site in a clean and orderly condition. Collect and remove waste
materials, debris, and rubbish from site daily and dispose off site.
Remove temporary utilities, equipment, facilities, and materials prior to
Final Application for Payment inspection. Restore existing facilities
used during construction to original condition.
2.11 EROSION CONTROL
Contractor shall be responsible for preventing erosion on the site and
sedimentation off the site. Methods shall be employed as
recommended in the North Carolina Erosion and Sediment Control
Planning and Design Manual, latest edition.
2.12 FINAL CLEANING
Execute final cleaning prior to final project assessment. Clean site and
all installed work. Remove waste and surplus construction materials,
rubbish, and construction facilities from the site.
END OF SECTION
Stream Repairs & Bank Stabilization Page 2 Technical Specifications
Haywood County Stream Repairs May 2005
SECTION 3 - QUALITY CONTROL
1
3.1 SECTION INCLUDES
Observation of construction operations and buffer and stream bank
planting. Independent testing laboratory soil testing and reporting
3.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS. Unless indicated
otherwise, the Owner will arrange and pay for initial planting
observation for quality assurance. Re-observation testing required
because of non-conformance to plans or Specifications shall be charged
against any money owed to Contractor. Contractor is encouraged to
perform quality control checks and testing at Contractor's expense to
reduce,the possibility of rejected work.
3.3 REFERENCES
For products or workmanship specified by association, trade, or other
consensus, comply with requirements of the standard, except when
more rigid requirements are specified or are required by applicable
codes.
I
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Conform to reference standard by date of issue on date of Contract
Documents, except where a specific date is established by code.
Section 6 (Filling, Backfilling, and Compaction) of these
Specifications.
Section 8 (Stream Bank Planting) of these Specifications.
Section 9 (Wetland and Buffer Planting) of these Specifications.
3.4 CONSTRUCTION OBSERVATION
The Owner has engaged the Engineer to observe construction
operations as required in these Specifications. Reports (either verbal or
written) shall be submitted concurrently to the Engineer, Owner, and
Contractor, indicating observations indicating compliance or
non-compliance with Contract Documents.
Observation of construction operations does not relieve Contractor of
obligation to perform work to contract requirements. The Contractor
shall allow observation personnel access to materials, and the
construction site as required.
3.5 PLANTING OBSERVATION
The Owner has engaged the Engineer to observe stream bank and
buffer planting as required in these Specifications. Reports will be
submitted concurrently to the Engineer, Owner, and Contractor,
indicating observations and indicating compliance or non-compliance
with Contract Documents.
Observation of planting operations does not relieve Contractor of
obligation to perform work to contract requirements. The Contractor
shall allow observation personnel access to materials (see stream bank
plantings specified in Section 8), and the construction site as required.
3.6 SOIL TESTING
The Owner will arrange and pay for independent soil laboratory testing
as required in these Specifications. Reports will be submitted
concurrently to the Engineer, Owner, and Contractor, indicating
observations and results of tests and indicating compliance or
non-compliance with Contract Documents.
Testing or inspecting does not relieve Contractor of obligation to
perform Work to contract requirements. The Contractor shall allow
testing personnel access to materials and the construction site as
required.
3.7 NOTICE REQUIRED FOR TESTING
Contractor shall provide Owner at least 24 hours notice for any work
requiring planting observation and/or soil testing.
END OF SECTION
Stream Repairs & Bank Stabilization Page 3 Technical Specifications
Haywood County Stream Repairs May 2005
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SECTION 4 - SITE PREPARATION
4.1 SECTION INCLUDES
Site preparation shall consist of utility location and protection, clearing,
grubbing and stripping of the work area, and construction of any
required temporary construction access routes and temporary sediment
and erosion control measures.
4.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
4.3 UTILITY LOCATION AND PROTECTION
The Contractor shall locate all existing utilities and mark for
identification. Contractor shall provide means for protecting utilities
from any damage during site work. Repair of damaged utilities shall be
at Contractor's expense. Coordination should be made with Owner to
locate and mark site specific utilities. NC ONE CALL (1-800-632-
4949)
4.4 SEDIMENTATION AND'EROSION CONTROL
Contractor shall be responsible for preventing erosion on the site and
sedimentation off the site. Methods shall be employed as
recommended in the North Carolina Erosion and Sediment Control
Planning and Design Manual, latest edition.
The Contractor shall control sedimentation runoff with methods
approved by the Engineer during the course of construction of this
Project.
Temporary erosion and sediment control measures shall be installed as
described in Section 11 (Sediment & Erosion Control). The Contractor
shall conform to all the rules, regulations, laws, and ordinances of the
State of North Carolina, and of all other authorities having jurisdiction.
4.5 CONSTRUCTION LAYOUT
The layout will be performed by Soil & Environmental Consultants,
PA (S&EC) or its subcontractors. The construction layout will include
but will not necessarily be limited to: channel alignment and
construction limits. The Contractor is not responsible for the
construction surveying, layout, or as-built; however, the maintenance
and preservation of the construction stakes is the responsibility of the
Contractor. Damage to layout stakes due to contractor negligence as
determined by the Engineer will be the Contractor's responsibility, and
payment equivalent to the time and materials required to re-stake the
project by S&EC or its subcontractors will be required. Layout staking
will be coordinated with the project phasing in order to
reduce/eliminate potential damage. The Contractor is required to have a
laser level or other equivalent equipment available on site during the
entire period of construction.
4.6 CLEARING, GRUBBING, AND STRIPPING
Conform to applicable code for environmental requirements, disposal
of debris, and erosion and sedimentation control as described above.
Coordinate clearing work with utility owners and operators as
described above. Establish a schedule for daily removal of debris from
the site. Debris may not be stockpiled on site. Clear areas required for
access to site and execution of work. Remove trees, stumps, other
wood, metal, or rubble debris within work areas.
Remove stumps, main root ball, and all roots with a diameter greater
than 2 inches. Leave area in a clean and neat condition. Grade site
surface daily to control the direction of channelized flow and prevent
free standing surface water.
In areas where stream restoration will be implemented, the existing top
six inches of soil should be removed and stockpiled prior to excavation,
construction, or reconstruction er"forts.
4.7 DEWATERING
Comply with all rules, regulations, laws, and ordinances of the State of
North Carolina, and of all other authorities having jurisdiction.
Provide without additional cost to the Owner all labor, materials,
equipment, and services necessary to make the work comply with such
requirements. Install all barriers, erosion and sedimentation control,
silt fences, turbidity curtains, and other measures as required to prevent
off-site sedimentation.
Grade and ditch the site or provide sumps and pumps as necessary to
direct surface runoff away from open excavations and subgrade
surfaces. Provide and maintain temporary trenches, drain pipes, sumps,
and other equipment to keep all excavations dry. Collect and remove
all groundwater seepage, surface runoff, and wastewater from
construction activities. All water pumped or drained from the Work
shall be disposed of in a manner that will not result in undue
interference with other work or damage to adjacent properties, other
surfaces, structures, and utilities.
Suitable temporary pipes, flumes, or channels shall be provided for
water that may flow along or across the site of the Work. All water due
to the dewatering operation shall be legally disposed of in accordance
with all applicable state and federal regulations and other applicable
regulations.
Under no circumstances shall fill be placed in excavations containing
standing water without approval of the Engineer.
END OF SECTION
Stream Repairs & Bank Stabilization Page 4 Technical Specifications
Haywood County Stream Repairs May 2005
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SECTION 5 - EXCAVATION
5.1 SECTION INCLUDES
Provide all necessary equipment and labor to excavate for channel
restoration without damage or interruption of utility service.
5.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
5.3 REFERENCES
Occupational Safety and Health Administration - Construction
Standards for Excavations, 29 CFR Part 1926.650-.652.
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
5.4 PREPARATION
Locate, identify, and protect utilities from damage as described in
Section 4.3. Notify utility companies and coordinate for and/or install
protection of utilities.
5.5 EXCAVATING
Protect all utilities and structures that may be damaged by excavating
work.
In areas where stream and floodplain grading will be implemented, the
existing top six inches of soil should be removed and stored prior to
construction or reconstruction efforts.
Excavate subsoil to accommodate restored channel cross-sections, and
other site work as shown on the Drawings. Perform Work in
accordance with Occupational Safety and Health Administration
(OSHA) - Construction Standards for Excavations, 29 CFR Part
1926.650-.652. Provide trench and excavation protection as required.
Slope banks with machine to stable slope or flatter until shored. Grade
top perimeter of excavation to prevent surface water from draining into
excavation. Where required to protect utilities, perform excavation by
hand.
Remove cemented subsoil, boulders, and rock. Cemented subsoil,
boulders, and rock shall be defined as materials which can not be
readily broken down to less than 1/4 cu. yd. solid volume by
concentrated effort of a track-mounted excavator, equivalent to a
Caterpillar 225, equipped with rock teeth. Notify Engineer if
subsurface conditions require excavation of larger cemented subsoil,
boulders, and rock, and discontinue Work in affected area until notified
to resume work. If cemented subsoil, boulders, or rock greater than %:
cu. yd. solid volume is encountered above required excavation,
Engineer may direct adjustment in construction elevations.
Adjustment of elevations shall not be a basis for additional payment.
Correct areas over excavated in accordance with Section 6 (Filling,
Backfilling, and Compaction). Stockpile select excavated material on-
site for re-use in backfill. Stockpile location shall be subject to Owner
approval.
5.6 PLANTING PREPARATION
In areas where buffer planting will be implemented, the stockpiled
topsoil should be redistributed in preparation for restoration planting
operations as described in SECTION 7 (Channel Protective Linings
and In-stream Structures) of these Specifications.
All areas where topsoil is distributed shall be disked or harrowed to
ensure soil aeration and to increase the surface roughness prior to
planting.
5.7 TOLERANCES
Top surface of channel protective lining (where applicable): Plus or
minus one inch from required elevations.
Top surface of fill, backfill, and topsoil: Plus or minus one inch from
required elevations.
END OF SECTION
Stream Repairs & Bank Stabilization Page 5 Technical Specifications
Haywood County Stream Repairs May 2005
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SECTION 6 - FILLING, BACKFILLING AND COMPACTION
6.1 SECTION INCLUDES
Provide all necessary equipment and labor to perform filling,
backfilling, and compaction necessary for construction of restored
stream channel, and other site work as shown on the Drawings without
damage or interruption of utility service.
Replacement of removed topsoil shall be as described in SECTION 5.6
(Planting Preparation) of these Specifications. .
6.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
6.3 REFERENCES
ASTM D698 - Test Methods for Moisture-Density Relations of Soils
and Soil-Aggregate Mixtures, Using 5.5 lb. Rammer and 12-inch Drop.
ASTM D1556 - Test Method for Density of Soil in Place by the
Sand-Cone Method.
ASTM D2922 - Test Methods for Density of Soil and Soil-Aggregate
in Place by Nuclear Methods (Shallow Depth).
ASTM D3017 - Test Methods for Water Content of Soil and Rock in
Place by Nuclear Methods (Shallow Depth).
ASTM D2487 - Classification of Soils for Engineering Purposes.
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
6.4 FILL MATERIALS
Soil excavated during construction and stockpiled may be re-used as
fill provided that it can be conditioned and compacted as specified.
Supplement or replace excavated soils with ordinary fill as needed to
complete work. Ordinary fill shall be any soil classified as SM, SC,
SP-SM, SP-SC, SC-SM, SP, or SW under ASTM D2487.
If soil excavated during cut operations is not re-used, it shall be
removed from the site to an appropriate disposal facility at no
additional charge to Owner. The Contractor shall be responsible for
the payment of all fees associated with transportation and disposal of
unusable materials.
Suitable borrow material may be available within the vicinity of the
project site but must be identified by a Geotechnical Engineer. The
Contractor shall obtain results of a Standard Proctor test, Atterberg
Limits test, and classification in accordance with ASTM D2487, and
submit to the Engineer for approval.
6.5 PREPARATION
Compact subgrade to density requirements for subsequent backfill
materials. Cut out soft areas of subgrade not capable of compaction in
place. Backfill with ordinary fill material and compact to density equal
to or greater than requirements for subsequent fill material.
Stream Repairs & Bank Stabilization Page 6
Haywood County Stream Repairs
6.6 BACKFILLING, FILLING, AND SURFACE PREPARATION
Backfill areas to contours and elevations with unfrozen materials. Do
not backfill over porous, frozen, or spongy subgrade surfaces. Employ
a placement method that does not disturb or damage other work. Slope
grade minimum 2 inches in 10 feet, unless noted otherwise. Make
gradual grade changes. Blend slope into level areas. Place backfill and
fill in loose level lifts not to exceed six inches in thickness before
compaction. Make gradual grade changes. Blend slope into level
areas. Slope grade minimum 2 inches in 10 feet, unless noted
otherwise.
Earth fill in embankments, dams, levees, channel plugs, and other
structures designed to restrain the movement of water shall be placed
so as to meet the following additional requirements:
a. The distribution of materials throughout each zone shall be
essentially uniform and the fill shall be free from lenses, pockets,
streaks, or layers of material differing substantially in texture or
gradation from the surrounding materials.
b. Backfill areas to contours and elevations with unfrozen materials.
Do not backfrll over porous, frozen, or spongy subgrade surfaces.
Employ a placement method that does not disturb or damage other
work. Place backfill and fill in loose level lifts not to exceed six
inches in thickness before compaction. Make gradual grade
changes. Blend slope into level areas. Slope grade minimum 2
inches in 10 feet, unless noted otherwise.
c. If the surface of any layer becomes too hard and smooth for proper
bond with the succeeding layer, it shall be scarified parallel to the
axis of the fill to a depth of not less than 2 inches before the next
layer is placed.
d. The top surfaces of embankments shall be maintained
approximately level during construction, except that a crown or
cross-slope of not less than 2% shall be maintained to insure
effective drainage, and except as otherwise specified for drain fill
zones. If the Drawings or Specifications require, or the Engineer
directs, that fill be placed at a higher level in one part of an
embankment than another, the top surface of each part shall be
maintained as specified above.
e. Dams and other embankments shall be constructed in continuous
layers from abutment to abutment except where openings to
facilitate construction or to allow the passage of stream flow
during construction are specifically authorized in the Contract.
Embankments built at different levels as described under
SECTION 6.6-d or -e above shall be constructed so that the slope
of the bonding surfaces between embankment in place and
embankment to be placed is not steeper than 2 feet horizontal to 1
foot vertical. In areas where existing embankment is to be
flattened, topsoil shall be removed as described in SECTION 5.5
(Excavating). New embankment material shall be benched into
existing slope as shown on the plans. Short bench levels shall be
formed to a slope of 2H: IV or flatter, based on existing slope
conditions as determined by the Engineer at the time of
construction. Benching shall be constructed in such a fashion as
to inhibit the formation of preferential planes of slope failure. The
bonding surface of the embankment in place shall be stripped of
all loose material, and shall be scarified, moistened and
recompacted when the new fill is placed against it as needed to
Technical Specifications
May 2005
insure a good bond with the new fill and to obtain the specified
moisture content and density in the junction of the in-place and
new fill. Any variation to this method of tying new fill into the
existing embankment shall be determined in the field at time of
construction by the Engineer.
Independent testing laboratory (SECTION 3 - Quality Control) shall
monitor backfill and fill placement. In-place density tests shall be
performed at least every two feet in elevation within the fill or backfill
and within the top one foot of fill or backfill where the higher density
requirement applies. If tests indicate backfill or fill material does not
meet specified requirements, remove, replace, and retest backfill or fill.
6.7 COMPACTION AND QUALITY CONTROL
For backfilling of old stream channel, maintain moisture content of
backfill and fill to within two percent of the optimum moisture content
by ASTM D698 for the particular soil being placed. Compact to greater
than or equal to 95 percent of the maximum dry density by ASTM
D698 for the particular soil being placed. Lift thickness shall not
exceed 6".
For backfill around existing concrete structures (both precast and cast-
in place), maintain moisture content of backfill and fill to within two
percent of the optimum moisture content by ASTM D698 for the
particular soil being placed. Compact to greater than or equal to 95
percent of the maximum dry density by ASTM D698 for the particular
soil being placed. Lift thickness shall not exceed 6" and shall be placed
uniformly around the entire outside edge of the structure so as not to
create a non-uniform soil load condition.
6.8 PROTECTION OF FINISHED WORK
Protect finished work. Reshape and re-compact fills subjected to
vehicular traffic or damaged by erosion.
6.9 TOLERANCES
Top surface of channel protection lining (where applicable): Plus or
minus one inch from required elevations.
Top surface of fill, backfill, and topsoil: Plus or minus one inch from
required elevations.
Top surface of floodplain (where applicable): Plus or minus one inch
from required elevations.
END OF SECTION
Materials include excelsior and coir fiber matting manufactured
especially for erosion control, wire staples, wooden construction stakes;
nonwoven geotextile, logs, boulders, NCDOT Coarse Aggregate Size
#57, NCDOT Class A Erosion Control Stone, NCDOT Class B Erosion
Control Stone, NCDOT Class 1 Rip Rap (RipRap), and NCDOT Class
2 Rip Rap (RipRap).
SECTION 7 - CHANNEL PROTECTIVE LININGS AND IN-
STREAM STRUCTURES
7.1 SECTION INCLUDES
Temporary and permanent channel erosion protective linings and in-
stream rock and log structures.
7.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
7.3 REFERENCES
The following specifications and methods.form a part of this
specification:
ASTM C88 - Standard Test Method for Soundness of Aggregates by
Use of Sodium Sulfate or Magnesium Sulfate
ASTM C127 - Standard Test Method for Specific Gravity and
Absorption of Coarse Aggregate
NCDOT - Standard Specifications for Roads and Structures.
When the specifications or drawings differ from the requirements of the
above-referenced documents, the more stringent requirements shall
apply.
7.4 GENERAL
A Channel Protective Lining has been selected along channel banks.
In-stream structures will be installed to create a more natural channel
profile for use in the stream Materials to be used in Channel
Protective Linings and the in-stream structures are specified in this
section.
Channel erosion protection linings shall be constructed of the materials
specified in this section and as shown on the drawings. Linings shall
be laid true to the grade shown on the drawings. Linings shall make a
smooth interface with the surrounding grade. Any portion of the lining
which has its grade or surface disturbed after placement shall be
repaired. Any portion thereof already in place which is found to be
defective or damaged shall be repaired or replaced, as directed by the
Engineer, without additional cost to the Owner.
The in-stream structures shall be constructed of the materials specified
in this section and as shown on the drawings. Any portion of the
structure which is disturbed after placement shall be repaired. Any
portion of the structure found to be defective or damaged shall the
repaired or replaced, and directed by the Engineer, without additional
cost to the Owner.
7.5 MATERIALS
Stream Repairs & Bank Stabilization
Haywood County Stream Repairs
Page 7
Technical Specifications
May 2005
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Matting for erosion control in areas other than streambanks with mild
slopes shall be excelsior matting. Excelsior matting shall consist of a
machine produced mat of curled wood excelsior a minimum of 47
inches in width. The mat shall weigh 0.975 pounds per square yard
with a tolerance of plus or minus 10 percent. At least 80 percent of the
individual excelsior fibers shall be 6 inches or more in length. The
excelsior fibers shall be evenly distributed over the entire area of the
blanket. One side of the excelsior matting shall be covered with an
extruded plastic mesh. The mesh size for the plastic shall be a
maximum of 1" x 1" square: Matting for erosion control shall not be
dyed, bleached, or otherwise treated in a manner that will result in
toxicity to vegetation. Other acceptable material manufactured
especially for erosion control may be used when approved by the
Engineer in writing before being used.
Erosion control matting for streambanks shall be CF 7 coir matting.
Matting shall be 100% coir fiber. Minimum specifications for coir
matting as follows:
Weight 20.6 oz/yd2 (700 g/mZ) ASTM-D3776
Thickness 6.34 mm
Water Velocity 10 ft/s
Grab/Elongation (Dry) 115.81bs/23.9% MD ASTM-D4594
54.1lbs/33.5% XD
Manning's n 0.0294
Max Shear Stress 4.46 lb/ft'
Wire staples shall be machine made of No. 11 gage (0.091" diameter)
new carbon steel wire formed into a "U" shape. The size when formed
shall be 18" in length with a throat of not less than 1" in width.
Wooden construction stakes shall be of hardwood, cut from sound solid
trees and free from defects that would impair the strength of the stake.
Stakes shall be a minimum of three feet long and a maximum of four
feet long and shall contain no unsound knots. One end shall be cut to
provide a point; the opposite end shall be cut square. Either round or
square stakes may be used. Round stakes shall be straight and a
minimum of two (2) inches in diameter. Square stakes may be used
provided that the minimum dimension in either direction is one and
one-half (1.5) inches. Stakes shall be cut with a''/3" deep notch 5" from
the top of the stake. The stake shall not deviate more than one inch at
any point from a straightedge held longitudinally along the piece.
Nonwoven Geotextile: Geotextile shall be a nonwoven fabric with a
minimum weight of 6 ounces per square yard (ASTM D3776), a
minimum grab strength in either direction of 180 pounds (ASTM
D4632), a minimum puncture resistance of (ASTM D4833) of 85
pounds, and permeability of (ASTM D4491) greater than 0.2 cm/sec.
Fabric meeting these Specifications shall still be subject to approval or
rejection by the Engineer. At the time of installation, the fabric will be
rejected if it has defects, rips, holes, flaws, deterioration, or damage
incurred during the manufacture, transportation, or storage.
NCDOT Coarse Aggregate Size #57: Shall conform to gradation
requirements of Table 1005-1, NCDOT Specifications.
NCDOT Class A Erosion Control Stone: 2 to 6-inch, widely graded,
durable, crushed stone conforming to applicable NCDOT standards
(No more than 5% of the material furnished can be less than the
minimum size specified, nor more than 10% of the material can exceed
the maximum size specified). Concrete rubble shall not be used.
NCDOT Class B Erosion Control Stone: 5 to 12-inch, widely graded,
durable, crushed stone conforming to applicable NCDOT standards
(No more than 5% of the material furnished can be less than the
minimum size specified, nor more than 10% of the material can exceed
the maximum size specified). Concrete rubble shall not be used.
NCDOT Class 1 Rip Rap (RipRap): 5 to 17-inch, widely graded,
durable, crushed stone conforming to applicable NCDOT standards.
The stone shall vary in weight from 5 to 200 pounds with 30%
weighing a minimum of 60 pounds each and 10% weighing a minimum
of 15 pounds each. (No more than 5% of the material furnished can be
less than the minimum size specified, nor can more than 10% of the
material exceed the maximum size specified). The rock fragments shall
be angular to subrounded in shape. Concrete rubble shall not be used.
NCDOT Class 2 Rip Rap (RipRap): 9 to 23-inch, widely graded,
durable, crushed stone conforming to applicable NCDOT standards.
The stone shall vary in weight from 25 to 250 pounds and 60% shall
weigh a minimum of 100 pounds each. (No more than 5% of the
material furnished can be less than the minimum size specified, nor can
more than 10% of the material exceed the maximum size specified).
The rock fragments shall be angular to subrounded in shape. Concrete
rubble shall not be used.
Boulders: Boulders of approximate dimension 5' x 3' x 2' shall be
individually picked by contractor from the quarry or the on site
stockpile for use in in-stream structure construction. Boulders as small
as 3' x 2' x 2' may be used; however, they shall not constitute more
than 30 % of the total boulders. Boulders shall be relatively flat on
either side in the same dimension, preferably the long dimension and
must have smooth ends.
Logs: Logs shall be hardwood with entire root mass intact and
attached to log. Branches shall be removed, and the log shall have a
uniform diameter over its length. Vane logs shall be a minimum of 15
feet long with a diameter of 12 inches to 18 inches. Anchor logs shall
be a minimum of 10 feet long with a diameter of 12 inches to 18
inches.
7.6 IN-STREAM STRUCTURES
The work covered by this section consists of the construction of in-
stream structures including rock cross vanes (with or without rock
steps) and rock or log j-hooks (with or without rock steps).
The quantity of in-stream structures to be constructed will be affected
by actual conditions that occur during the construction of the project.
The type and quantity of structures may be increased or decreased at
the direction of the Engineer. Such variations in quantity will not be
considered as alterations in the details of construction or a change of
character of the work.
A tracked hydraulic excavator with a thumb of sufficient size to move
specified boulders is required for this item. Precise placement of
structures will be determined during construction by the Engineer and
may not reflect the construction drawings. In-stream structures
installed must be inspected and approved by the Engineer. Excavation
for the purpose of installing structures is incidental and is covered by
this line item.
Stream Repairs & Bank Stabilization
Haywood County Stream Repairs
Page 8
Technical Specifications
May 2005
The excavation of the subgrade and installation of the structure will be
consecutive and continuous. Once the installation procedure has
initiated it will be completed before the end of the workday. Any
incidental/accidental discharge of sediment accumulation as a result of
the installation procedure will be removed or integrated into the
designed bedform. Excavation shall terminate at bedrock if contacted
prior to the design grade. Bedrock will be excavated only if it is
determined to be rippable and necessary by the Engineer.
Grade area where structures are to be constructed. Surface shall be free
of obstructions, debris, and pockets of soft or low density material.
Unless otherwise directed by the Engineer, the stone shall be placed on
the slope and/or angle as indicated on the plans. The stone shall be
graded so that the smaller stones are uniformly distributed throughout
the mass. The Contractor may place the stone by mechanical methods,
augmented by hand placing where necessary, provided that when the
rip rap is completed, it forms a properly graded, dense, neat layer of
stone. The completed rip rap shall be at least the thickness indicated on
the plans. Drop height shall be not more than one foot.
Place rock cross vanes and j-hooks (and rock sections of log j-hook) as
shown in Drawings. Footer rocks shall be installed to define shape of
in-stream rock structures, and the arms of in-stream log• j-hooks.
Footer rocks shall be installed such that their long dimension is
oriented in the direction of flow. No gaps shall be left between footer
rocks. Minimum footer rock depth below the proposed ground surface
of the stream bed shall be 4 feet. Rock sills shall extend a minimum of
3 feet beyond bankfull (perpendicular to stream flow) as indicated on
plans. Geotextile shall be placed over structures and backfilled with
aggregate as shown on plans.
Log vanes shall be placed on top of footer rocks along an anchor log as
' shown on plans. The upstream end of the log shall be buried and
pinned between a boulder and a footer rock. Geotextile shall be nailed
to the upstream side of the log and backfilled with aggregate as shown
on plans.
[I
The quantity of cross-vanes and j-hook vanes to be paid for will be
determined by the actual number of structures installed during the
construction process.
Cross vanes and j-hook vanes will be paid for per individual installed,
and includes the handling and transportation of logs and boulders,
integration of nonwoven filter fabric, backfill of selected aggregate, and
fine grading. The quantities of stone including the boulders utilized
should not be priced under this item of work.
7.7 CHANNEL PROTECTIVE LININGS
Grade area to be lined. Surface shall be free of obstructions, debris,
and pockets of soft or low density material. The rock weir structures
shall be completed prior to installation of the channel protective
linings.
Cover area with stockpiled topsoil to a depth of not less than 4 inches.
Final grade with topsoil shall be as shown on drawings. Topsoil shall
be prepared with fertilizer and lime, and seeded as described in Section
10 (Permanent Seeding) of these specifications.
Install CF-7 erosion control matting perpendicular to the axis of the
stream: The matting shall be laid smooth and free from tension, stress,
folds, wrinkles or creases. Horizontal overlaps shall be a minimum of
12 inches with the upper matting overlapping the lower matting.
Vertical overlaps in matting shall be a minimum of 12 inches with the
upstream matting overlapping the downstream matting.
The top (crest) edge of the matting shall be anchored in trench at least
12 inches deep as shown on plans to prevent undercutting of the
matting. Trench should be located a minimum of 12 inches from the
top of bank, and shall not alter channel or floodplain grade. Matting
trench and Eco-Stakes® shall be installed as shown on plans. Matting
shall be anchored utilizing Eco-stake® brand stakes installed not more
than 3 feet apart (3' on centers) and staggered, with a minimum of 3
stakes per square yard of matting over the entire lined area. 24-inch
Eco-stakes® shall be used along the toe of the channel and 12-inch
stakes shall be used within the field and top edge of the matting as
detailed on the construction plans. Along all laps (both vertical and
horizontal) in the matting, install a common row of staples at the seam,
installing staples on 1 foots (12 inch) centers. Along the toe, 24 inch
Eco-Stakes® shall be spaced not more than 2 feet All stakes shall be
driven perpendicular to the axis of the stream as shown in plans. Care
shall be taken to avoid damage to matting material.
In the event that the matting is displaced or damaged during
installation, the matting shall be repositioned or replaced. This will be
done at no additional cost to the Owner.
7.8 SLOPE PROTECTION
Grade area to be lined. Surface shall be free of obstructions, debris,
and pockets of soft or low density material.
Cover area with stockpiled topsoil to a depth of not less than 4 inches.
Final grade with topsoil shall be as shown on drawings. Topsoil shall
be prepared with fertilizer and lime, and seeded as described in Section
10 (Permanent Seeding) of these specifications.
Install excelsior matting perpendicular to slope. Matting shall be
unrolled with netting material on top and blanket material in contact
with the soil. (Note: some excelsior matting has netting on both sides.)
The matting shall be laid smooth and free from tension, stress, folds,
wrinkles or creases. Horizontal overlaps shall be a minimum of 12
inches with the upper matting overlapping the lower matting. Vertical
overlaps in matting shall be a minimum of 12 inches.
The top (crest) and bottom (toe) edges of the matting shall be anchored
in trench at least 12 inches deep as shown on plans to prevent
undercutting of the matting. Matting trench and wire staples shall be
constructed and installed as shown on plans. Wire staples shall be
installed not more than 3 feet apart (3' on centers) and staggered, with a
minimum of 3 stakes per square yard of matting over the entire lined
area. Staples shall be driven perpendicular to the soil surface. Staples
shall be driven flush with soil surface to reduce potential for movement
of the erosion control matting. Staples shall be installed in parallel
rows on 3' centers and in trenches at the top and bottom of the slope as
shown on drawings. Along all laps (both vertical and horizontal) in the
matting, install a common row of staples at the seam, installing staples
on Ifoot (12 inch) centers. All standard anchoring staples shall be 18
inches in length. Staples shall be driven in with a wooden mallet. Care
shall be taken to avoid damage to matting material.
In the event that the matting is displaced or damaged during
installation, the matting shall be repositioned or replaced. This will be
done at no additional cost to the Owner.
END OF SECTION
Stream Repairs & Bank Stabilization
Haywood County Stream Repairs
Page 9
Technical Specifications
May 2005
SECTION 8 - STREAM BANK PLANTING
' 8.1 SECTION INCLUDES
Provide all necessary equipment and labor to implement planting plan.
8.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
8.3 REFERENCES
The following specifications and methods form a part of this
' specification:
NCDOT - Standard Specifications for Roads and Structures.
i 15 NCAC 213.200 - Classification of Water Quality Standards
Applicable to Surface Waters & Wetlands of North Carolina
The Baily Hortorium (1976 MacMillan Publishing Co., Inc.)
American Standard for Nursery Stock, latest edition
G
NCDENR - Erosion and Sediment Control Planning and Design
Manual
When the specifications or drawings differ from the requirements of the
above-referenced documents, the more stringent requirements shall
apply.
8.4 GENERAL
All plants shall be as called for by these specifications. Live stakes
shall be used for all plant species. Botanical names referred to in the
plans are taken from "Hortus Third", the Baily Hortorium (1976
MacMillan Publishing Co., Inc.). All plants delivered shall be true to
name. Each plant, or group of the same species, variety, and size of
plant, shall be legibly tagged with the name and size of the plant.
All plants shall be first-class representatives of their species. Stakes
shall be reasonably straight.
All plants shall be free from plant diseases and insect pests. All
shipments of plants shall comply with all nursery inspection and plant
quarantine regulations of the states of origin and destination, as well as
with Federal regulations governing interstate movement of stock. If
stock from other states is used, the stock shall be accompanied by a tag
or certificate stating, in effect, that the stock has been inspected and
certified by an authorized official of the state of origin as apparently
free from injurious plant pests.
All plants shall be subject to inspection at any time by the Engineer.
Any such inspection before or during planting operations, however
shall not be construed as final acceptance of the plants involved.
8.5 PLANT STAKES AND CUTTINGS
Plant stakes and cuttings if approved for use by the Engineer shall
consist of freshly cut live plants of select stock which has been
developed by proper cultural treatment. Stakes and cuttings shall be
3/8" to %" diameter and between 12 and 18 inches long. They shall be
carefully cut from mother-stock plantings. Plant materials shall be
packaged, transported, and handled in a manner that will prevent
injury, drying out, or freezing.
8.6 PLANT SUBSTITUTION
No change in the specified plants (species, variety, size, caliper,
fumish, etc.) will be made without written approval of the Engineer.
All requests by the Contractor for substitutions shall be presented in
writing and shall include a listing of the sources which have been
contacted in an attempt to secure the specified plant material. Requests
for substitutions shall include botanical name, common name, size,
caliper, and furnish description of the proposed substitute. No increase
in compensation will be made to the Contractor as a result of the use of
the approved substitute plants.
8.7 PLANTING PREPARATION
In areas where stream restoration will be implemented, preparation for
restoration planting operations shall be as described in SECTION 7
(Channel Protective Linings) of these specifications.
Where plant stakes and plant cuttings shall be planted through the
Channel Protective Lining, holes shall be made by neatly punching a
hole in the matting with a dibble bar, (a heavy metal tool with a blade
and a foot petal). The dimensions of the hole shall not exceed 3" in any
direction, taking care not to damage the surrounding matting.
8.8 STREAM BANK PLANTING
Where plant stakes and plant cuttings shall be planted, they shall be
installed at a 45 to 60 degree angle in the direction.of stream flow. The
buds of stakes and plant cuttings should point upward and about 2
inches of wood should be exposed above the ground surface. Tamp the
surrounding soil firmly to eliminate air pockets.
Where stream bank planting is directed, areas shall be planted with
shrub using 3-foot by 3-foot centers as shown on construction
drawings.
Care should be taken to avoid planting stakes too deep or too shallow,
and to avoid damage to stakes during planting. Planting depth should
be in accordance with listed references and supplier recommendations.
8.9 PLANTING PERIODS
The installation of plant stakes, cuttings, bare root, or container grown
plants shall be performed in mid to late winter, between December 1
and March 1 (best planting period February 1 to March 1) to allow
plants to stabilize during the dormant period and set root during the
spring. After March 1, only bare root and container grown plants shall
be used.
8.10 REMOVAL OF NUISANCE VEGETATION
Removal or control of nuisance vegetation shall be performed for a
period of 90 days as necessary to ensure adequate survival of specified
plant species. See SPECIAL CONTRACT PROVISIONS.
8.11 WATER FOR PLANTINGS
The Contractor shall install a rain gage and collect daily gage readings
at the site. Contractor shall provide initial watering on the day of
planting and thereafter at a minimum rate of 1 inch per week (including
rainfall) for a period of 90 days. Water used in the planting or care of
Stream Repairs & Bank Stabilization Page 10 Technical Specifications
Haywood County Stream Repairs May 2005
vegetation and plantings shall meet the requirements of Class C fresh
waters as defined in 15 NAC 213.200. See SPECIAL CONTRACT
PROVISIONS.
e
t
8.12 SUBMITTALS
Contractor shall submit purchase certificates (or other proof) of all
species planted.
END OF SECTION
SECTION 9 - BUFFER PLANTING
9.1 SECTION INCLUDES
Provide all necessary equipment and labor to implement planting plan.
9.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
9.3 REFERENCES
The Baily Hortorium (1976 MacMillan Publishing Co., Inc.)
American Standard for Nursery Stock, latest edition
NCDENR - Erosion and Sediment Control Planning and Design
Manual
15 NCAC 213.200 - Classification of Water Quality Standards
Applicable to Surface Waters & Wetlands of North Carolina
The following Specifications and methods form a part of this
specification:
NCDOT - Standard Specifications for Roads and Structures.
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
9.4 GENERAL
All plants shall be as called for by these Specifications. Bare rooted
plants may be used in lieu of container grown plants provided written
approval for such use has been obtained from the Engineer. Grading of
plants, type and minimum dimensions of containers shall conform to
the Specifications contained in the latest edition of American Standard
for Nursery Stock. Plants shall not be cut back from larger sizes to
meet sizes called for on the plans. Botanical names referred to in the
plans are taken from "Hortus Third", the Baily Hortorium (1976
MacMillan Publishing Co., Inc.). All plants delivered shall be true to
name. Each plant, or group of the same species, variety, and size of
plant, shall be legibly tagged with the name and size of the plant.
All plants shall be first-class representatives of their species. The root
system shall be vigorous and well-developed. The branch systems shall
be of normal development, and free from disfiguring knots, sun scald
injuries, abrasions of the bark, dead or dry wood, broken terminal
growth, or other objectionable disfigurements. Trees shall have
reasonably straight stems, and shall be well branched and symmetrical
in accordance with their natural habits of growth.
All plants shall be free from plant diseases and insect pests. All
shipments of plants shall comply with all nursery inspection and plant
quarantine regulations of the states of origin and destination, as well as
with Federal regulations governing interstate movement of nursery
stock. If nursery stock from other states is used, the stock shall be
accompanied by a tag or certificate stating, in effect, that the nursery
stock has been inspected and certified by an authorized official of the
state of origin as apparently free from injurious plant pests.
All plants shall be subject to inspection at any time by the Owner,
Engineer, or a party to be named by the Owner. Any such inspection
Stream Repairs & Bank Stabilization
Haywood County Stream Repairs
Page I1
i cciuucai .?Yccuicaucua
May 2005
i
before or during planting operations, however shall not be construed as
final acceptance of the plants involved.
9.5 CONTAINER GROWN PLANTS
Container grown plants shall be healthy, vigorous, well-rooted, and
shall have become established in the container in which they are
delivered. These plants shall have been in the established container
long enough for the fibrous roots to have developed so that the root
mass will retain its shape and hold together when removed from the
container. The container shall be a 1 gallon container or larger,
sufficiently rigid to firmly hold the soil protecting the root during
transporting, handling, and planting, and the soil shall not be allowed
to become frozen.
9.6 BARE ROOT PLANTS
Bare root plants if approved for use by the Engineer shall have a heavy
fibrous root system which has been developed by proper cultural
treatment. They shall be dug, packaged, transported, and handled in a
manner that will prevent injury to or drying out of the trunks, branches,
or roots, or freezing of the roots.
9.7 PLANT STAKES AND CUTTINGS
Plant stakes and cuttings if approved for use by the Engineer shall
consist of freshly cut live plants of select stock which has been
developed by proper cultural treatment. Stakes and cuttings shall be
3/8" to %' diameter and between 12 and 18 inches long. They shall be
carefully cut from mother-stock plantings. Plant materials shall be
packaged, transported, and handled in a manner that will prevent
injury, drying out, or freezing.
9.8 PLANT SUBSTITUTION
No change in the specified plants (species, variety, size, caliper,
furnish, etc.) will be made without written approval of the Engineer.
All requests by the Contractor for substitutions shall be presented in
writing and shall include a listing of the sources which have been
contacted in an attempt to secure the specified plant material. Requests
for substitutions shall include botanical name, common name, size,
caliper, and furnish description of the proposed substitute. No increase
in compensation will be made to the Contractor as a result of the use of
the approved substitute plants.
9.9 PLANTING PREPARATION
In areas where wetland and buffer planting will be implemented,
preparation for planting operations shall be as described in SECTION
5.6 (Planting Preparation) of these Specifications.
Where container grown plants will be planted, holes made in
preparation for tree and shrub species planting shall be as shown on
construction plans.
Where bare root plants, plant stakes, and plant cuttings shall be planted
in holes made by neatly punching a hole into existing grade with a
dibble bar, (a heavy metal tool with a blade and a foot petal), the
dimensions of the hole shall not exceed 3" in any direction.
9.10 PLANTING PERIODS
The installation of plant stakes, cuttings, bare root, or container grown
plants shall be performed in mid to late winter, between December 1
and March 1 (best planting period February 1 to March 1) to allow
plants to stabilize during the dormant period and set root during the
spring. After March 1, only bare root and container grown plants shall
be used.
9.11 REMOVAL OF NUISANCE VEGETATION
Removal or control of nuisance vegetation shall be performed for a
period of 90 days as necessary to ensure adequate survival of specified
plant species. See SPECIAL CONTRACT PROVISIONS.
9.12 WATER FOR PLANTINGS
The contractor shall install a rain gage and collect daily gage readings
at the site. Contractor shall provide initial watering on the day of
planting and thereafter at a minimum rate of 1" per week (including
rainfall) for a period of 90 days. Water used in the planting or care of
vegetation and plantings shall meet the requirements of Class C fresh
waters as defined in 15 NAC 213.200. See SPECIAL CONTRACT
PROVISIONS.
9.13 SUBMITTALS
Contractor shall submit purchase certificates (or other proof) of all
species planted.
END OF SECTION
Stream Repairs & Bank Stabilization Page 12 Technical Specifications
Haywood County Stream Repairs May 2005
1
SECTION 10 -PERMANENT SEEDING areas where Channel Protective Lining will be installed, no mulch shall
be used and erosion control matting shall be placed within 24 hours of
10.1 SECTION INCLUDES seeding. Apply seeds and mulch at the rates indicated below.
Permanent seeding for permanent site stabilization. Areas with Channel Protective Linings:
10.2 MEASUREMENT AND PAYMENT Species Rate 0s/acre)
Reed Canary Grass 10
See SPECIAL CONTRACT PROVISIONS (Phalaris arundinaceaj
10.3 REFERENCES Switch Grass 10
(Panicum virgatum)
The following specifications and methods form a part of this All other disturbed areas:
specification:
' Species Rate (Ibs/acre)
NCDENR - Erosion and Sediment Control Planning and Design Reed Canary Grass 25
Manual (Phalaris arundinacea)
Switch Grass 25
When the specifications or drawings differ from the requirements of the (Panicum virgatum)
above-referenced documents, the more stringent requirements shall
apply. Mulch Rate (Ibs/acre)
Grain Straw 4000
10.4 GENERAL (2 bales per 1000 square feet)
or
Permanent seeding shall be executed in temporary lined areas and all
other areas which are disturbed during construction activities. In areas Wood Fiber Mulch 1500
where Channel Protective Lining will be installed, seedbed preparation 10.7 SEEDING DATES
and seeding shall be performed prior to the placement of erosion
control matting (See SECTION 7 - Channel Protective Linings). Seeding dates given in these seeding specifications have the best
probability of success.
10.5 SEEDBED PREPARATION Best Possible
Late winter 15 Feb-15 Mar 1 Dec-15 Mar
Complete grading before topsoiling or preparing seedbeds. Avoid
' creating steep slopes. Excess stockpiled topsoil not used in Seeding shall be completed within the "possible" range of dates.
construction of Channel Protective Lining shall be redistributed across
areas to be seeded. Where topsoil is unavailable, seedbeds may be 10.8 SOIL AMENDMENTS
prepared directly on the exposed finished grade or topsoil may be
imported. Apply lime and fertilizer according to soil tests, or apply 2 tons/acre
(4,000 lb/acre) ground agricultural limestone and 2,800 lb/acre 10-10-
If topsoil is used, it should be spread to a uniform depth of four to six 10 fertilizer.
inches and bonded to the subsoil by loosening with a disc, harrow, or
e chisel plow. Areas where seeding will occur on exposed finished grade 10.9 MULCH
shall be disked or harrowed to ensure soil aeration and to increase the
surface roughness prior to planting. Apply grain straw, or equivalent cover of another suitable mulching
material as described above. Anchor mulch by roving or netting.
Apply lime and fertilizer evenly across seedbed and work into the top Netting shall be used on slopes steeper than 2H:1 V.
4-6 inches of soil by discing or other suitable means. Operate
machinery on the contour. END OF SECTION
Rework the surface if soil becomes compacted or crusted prior to
seeding. Complete seedbed preparation by breaking up large clods and
raking into a smooth, uniform surface. Fill in or level depressions that
' can collect water.
10.6 SEEDING
Apply permanent seeding to seedbed after preparation is complete. Use
certified seed for permanent seeding whenever possible. Certified seed
is inspected by the North Carolina Crop Improvement Association. It
meets published North Carolina Standards and should bear an official
' "Certified Seed" label. Broadcast seed into a freshly loosened seedbed
that has not been settled by rainfall. Mulch must be used on slopes
4H:1 V or steeper and in areas when concentrated water may flow.
' Anchor mulch with netting in areas subject to concentrated flow. In
Stream Repairs & Bank Stabilization Page 13 Technical Specifications
Haywood County Stream Repairs May 2005
n
1
SECTION 1 I - SEDIMENT & EROSION CONTROL
1 I.1 SECTION INCLUDES
Installation of temporary sediment and erosion control measures to
include installation of silt fence and temporary seeding measures. The
Contractor shall maintain these measures to ensure proper structure
function and vigorous temporary vegetative cover during construction.
11.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
11.3 REFERENCES.
The following Specifications and methods form a part of this
specification:
ASTM D4355 - Standard Test Method for Deterioration of Geotextiles
from Exposure to Ultraviolet Light and Water (Xenon-Arc Type
Apparatus)
ASTM D4632 - Standard Test Method for Grab Breaking Load and
Elongation of Geotextiles
ASTM D4751 - Standard Test Method for Determining Apparent
Opening Size of a Geotextile
NCDENR - Erosion and Sediment Control Planning and Design
Manual
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
11.4 MATERIALS
Silt Fence: Silt fence shall have steel posts, woven wire fabric, and
filter fabric. The steel post shall have a minimum length of Y and
minimum width of 13/4". The steel posts shall have projections for
fastening the wire to the fence. The woven wire fabric shall be at lest
32 inches high, and shall have at least 6 horizontal wires. Vertical
wires shall be spaced a maximum of 12 inches apart. The top and
bottom wires shall be at least 10 gauge. All other wires shall be at least
12%: gauge. The silt fence filter fabric shall meet the following
minimum criteria:
Grab Tensile Strength 100 lbs.
' Grab Tensile Elongation 15%
UV Resistance 70%
Apparent Opening Size (AOS) 20 (US Sieve)
11.5 SILT FENCE
The Contractor shall provide all labor, materials, tools and other items
necessary to fumish and install the silt fence as shown on the Drawings
and specified herein. The silt fence shall be placed following the
contours as closely as possible. The ends of the silt fence shall be
turned uphill.
The posts shall not exceed a spacing of 8 feet. The posts shall be
driven into the ground and shall extend above ground as shown on the
plans. The filter fabric shall be stapled or wired to each post. The filter
fabric shall extend into the ground as shown in the plans.
Stream Repairs & Bank Stabilization
Haywood County Stream Repairs
Page 14
If possible, the filter fabric shall be cut from a continuous roll to avoid
the use of joints. When joints are necessary, securely fasten the filter
cloth only at a support with overlap to the next post.
Silt fences shall be inspected weekly and after each significant storm (1
inch in 24 hrs.). Any required repairs shall be made immediately.
Sediment shall be removed when it reaches 1/3 height of the fence or 9
inches maximum. Dispose of the sediment in the designated disposal
area.
11.6 PUMP AROUND OPERATIONS
The work covered by this item includes: providing, installing,
maintaining, and removing all equipment and materials associated with
the pumping of channel flow around work areas and dewatering zones
during construction. The Contractor shall utilize the specified and
appropriately sized pumps to convey the diversion of water flow away
from the work area without creating a flood hazard or scour. The
Contractor is responsible for determining (based on the direction of the
Engineer) the location of coffer dams, pumps, discharge hose route,
stilling basins, splash pads, and period of operation prior to the
initiation of any pumping., An attempt will be made to complete all
grading, channel shaping, in-stream structure construction, and
stabilization for each section within one day. If work for any particular
section cannot be completed in one day, a 24-hour pumping operation
will be set up and maintained to facilitate the construction schedule.
Bypass Pump
The pump used to convey the stream flow around the work area during
construction should be capable of pumping and discharging an
estimated 15 gallons per minute. The Contractor is responsible for
selecting a properly sized pump. This unit should be a silent and self-
priming model with a self-contained fuel tank large enough to facilitate
a 24-hour pumping operation. The pump should also be matched with
the necessary footage of flexible or ductile hose and appropriately sized
fittings.
Dewatering Pumo
A second pump shall be used to dewater the work area between the
dams. The pump must be of sufficient size to dewater the work area
and pump that water from the bottom of the work area to the special
stilling basin. The pump should be matched with the necessary footage
of hose and the required fittings.
Special Stilling Basin
The special stilling basins are covered in detail under the "Special
Stilling Basins" section.
Temporary Splash Pad
A temporary splash pad shall be used to dissipate energy from the
discharge from the bypass pump. Alternatively, check dams may be
modified and used for this purpose as determined by the Engineer.
11.7 SPECIAL STILLING BASINS
The work covered by this section consists of furnishing, placing, and
removing special stilling basins as directed by the plans and the
Engineer. The special stilling basins shall be used to filter pumped
water during construction. The quantity of special stilling basins may
be increased, decreased, or eliminated entirely at the direction of the
Engineer. Such variations in quantity will not be considered as
alterations in the details of construction or a change in the character of
work.
Technical Specifications
May 2005
The special stilling basins shall be a water permeable fabric bag that
' traps sand, silt, and fines from the sediment laden water entering. The
filter fabric shall meet the requirements of Section 1056 for Type 2
Fabric.
' The special stilling basin shall be a bag constructed to a minimum size
of 10' X' 15' made from nonwoven fabric. There shall be a sewn-in 8
inch spout for receiving pump discharge. The bag seam shall be sewn
with a double needle machine using a high strength thread. The seams
shall have a minimum width strength of 60 lb/in (ASTM D-4884).
' The fabric used to construct the bag shall be stabilized to provide
resistance to ultra-violet degradation and meet the following
specifications for flow rates, strength, and permeability:
' Weight 8 oz/yd (ASTM D-3776)
Grab Tensile 200 lb (ASTM D-4632)
Puncture 130 lb (ASTM D-4833)
Flow Rate 80 gpm/sf (ASTM D-4491)
Permittivity 1.5 I/sec (ASTM D-4991)
W Resistance 70 % (ASTM D-4355)
' The special stilling basins shall be placed so the incoming water flows
through the bag without causing erosion. The bag will rest on
Nonwoven Type 2 filter fabric. The contractor will grade the bed to
ensure that the filtered water exits at the desired location. The exit
location shall be chosen to prevent erosion. The neck or spout of the
bag shall be tied tightly to prevent water from exiting the bag without
passing through the walls. The special stilling basin shall be disposed
of and replaced when it is % full of sediment, becomes tom or
punctured, or is unable to filter sediment at a reasonable flow rate.
Approval from Engineer must be received prior to removal and
replacement of special stilling basins. Contractor is responsible for
' providing the necessary quantity of special stilling basins for the
duration of the project.
11.8 TEMPORARY SEEDING
1
The Contractor shall provide all labor, materials, tools, and other items
necessary to provide temporary seeding in accordance with State and
local Standards.
Areas where no substantial or significant progress is made for more
than 15 days shall be temporarily seeded as shown on the Drawings and
specified herein. All areas must be seeded, mulched, and anchored
unless written approval is granted by the Owner. Incidental grading
shall not constitute substantial or significant progress in construction
activity.
Seeding and mulching shall be done immediately following
construction. All disturbed areas shall be dressed to a depth of 8
inches. The top 3 inches shall be pulverized to provide a uniform
seedbed.
Agricultural lime shall be applied at a rate of 95 pounds per 1000
square feet (95 lbs. /1000 sq.ft.) immediately before plowing.
Grass seed shall be applied at the following rate:
Type Dates Possible Rate
Rye (Grain) Aug. 15 -Nov. 1 120 lbs./ac.
Browntop Aug. 15 -Nov. 1 35 lbs./ac.
Millet
5-10-10 fertilizer shall be applied to all disturbed areas at a rate of 21
pounds per 1000 square feet (21 lbs./1000 sq.ft.), and mulching shall
consist of small grain straw applied a rate of 70 pounds per 1000
square feet (70lbs.11000sq.ft.). Mulch shall be anchored by roving or
netting.
END OF SECTION
Stream Repairs & Bank Stabilization Page 15 Technical Specifications
Haywood County Stream Repairs May 2005
SECTION 12 - SITE MAINTENANCE
12.1 SECTION INCLUDES
Site maintenance to ensure vigorous vegetative cover, stable channel
lining, and durability of the work.
12.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
12.3 EXECUTION
Contractor shall revisit the site as required in the special contract
provisions to inspect the condition of the project site. Areas of erosion,
settlement, poor vegetative cover, and displaced coir or excelsior
materials or in-stream structures, shall be repaired. Site visits shall be
coordinated with Owner.
Erosion areas shall be filled and reseeded in accordance with Section
10 - Permanent Seeding. Areas of poor vegetative cover shall be
reseeded and refertilized only.
Displaced, damaged, or dead shrub species shall be removed, and
replanted in accordance with Sections 8 & 9 - Stream Bank Planting
and Buffer Planting.
Displaced channel lining materials shall be recovered (if possible) and
replaced, or replaced with new channel lining materials to the design
line and grade.
END OF SECTION
Stream Repairs & Bank Stabilization Page 16 Technical Specifications
Haywood County Stream Repairs May 2005
40
i "m
CONSTRUCTION DRAWINGS FOR:
J. ¦
k
VICIN17Y MAP
(NOT TO SCALE)
?M
BURNETT COVE
BURNE7T COVE SITE - -
771 ? STREAM REPAIRS * BANK
STABILIZATION PLAN
ENGINEERING DESIGN FIRM:
McGILL A550CIATF5
55 Broad Street
A5heville, NC 28801
(828) 252-0575
ENVIRONMENTAL DE51GN FIRM:
501L ? ENVIRONMENTAL
CON5ULTANT5, PA
1010 Raven Ridge Road
Raleigh, NC 27G 14
(919) 84G-5900
HAYWOOD COUNTY, NC
COUNTY COURTHOU5E
215 N. MAIN 5TREET
WAYNE5VILLE, N.C., 28786
HAYWOOD COUNTY, NC
CONTENTS:
Al. COVER, CONTENT5, *VICINITY MAP
A2. 51TE MAPPING
A3. 51TE PHOTOGRAPH5
A4. EX15TING 51TE CONDITION5
A5. PROP05ED REPAIR PLAN
AG. CON5TRUCTION 51fQUENCE ? PROPO5ED 5TRUCTURE DETAIL5
AT PROP05ED CR055-5ECTION5 TOE 5TABILIZATION DETAIL
J11u CA rrrrq
A8. ER0510N CONTROL DETAILS I ;.?? ••.
A9. ER0510N CONTROL DETAIL5 II
SEAL 3
027788 _
A 10. PLANTING 5CHEDULE * PLANTING DETAIL5
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SITE MAPPING
1999
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PHOTO #1- UPSTREAM END OF SITE
LOOKING DOWNSTREAM (WEST),
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PHOTO #3 - EXISTING (REPAIRED)
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PHOTO #2 - DOWNSTREAM END OF SITE,
LOOKING UPSTREAM (EAST), RECENTLY
REPAIRED LEFT BANK, SITE ENTRANCE
GATE AT RIGHT REAR OF PHOTO
NOTES: EXISTING SITE CONDITIONS
1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY SCALE: 1"= 60'
PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SR 276
ON APRIL 12, 2005, USING GPS AND LASER-LEVEL EQUIPMENT. 20' WIDE
2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND EXISTING DEBRIS
INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND SPOIL PILE
AND REPAIR PLAN.
3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE
ONLY. EXACT LOCATIONS ARE TO BE VERIFED IN THE FIELD BY
CONTRACTOR.
EXISTING TOP
-OF BANK
UPSTREAM REPAIR
LIMIT (APPROX.)
EXISTING DEBRIS
AND SPOIL PILE
EXISTING
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EXISTING GRAVEL EXISTING
DOWNSTREAM ACCESS RD. SPOIL PILE
REPAIR LIMIT AVG. WIDTH=12'
(APPROX.)
EDGE OF
WATER
EXISTING OR NEWLY
REPAIRED TOP OF BANK
APPROX. LOCATION
XS#1 TYPICAL OF
EXISTING LEFT BANK
CONDITIONS
SEE REPORT FOR
CROSS SECTION DATA
EDGE OF WATER
(POND)
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PROPOSED REPAIR PLAN
1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY SCALE: 1"= 60'
PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A.,
ON APRIL 12, 2005, USING GPS AND LASER-LEVEL EQUIPMENT.
2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND
INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION
AND REPAIR PLAN.
ESTIMATED REPAIR LENGTH=600'
ESTIMATED UPSTREAM REPAIR LENGTH=300'
DISTURBED AREA=0.50 ACRES
3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE PROPOSED
ONLY. EXACT LOCATIONS ARE TO BE VERIFED IN THE FIELD BY REPAIR OPTION GRAVEL
CONTRACTOR. WITH VANE ARMS CONSTRUCTION
4. EXACT SPACING, LENGTH AND LOCATION OF VANE ARM STRUCTURES TO DEPICTED ENTRANCE #2
BE DETERMINED AT TIME OF CONSTRUCTION.
5. CONSTRUCT TOE STABILIZATION AS DIRECTED AT TIME OF CONSTRUCTION.
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PROPOSED
REMOVE UNCONSOLIDATED \
MATERIAL AND UTILIZE
FOR BACKFILL
TEMPORARY CHANNEL___ -_--
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N.C. ONE-CALL CENTER
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LIMIT OF REPAIR
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FOR BACKFILL
DOWNSTREAM
LIMIT OF REPAIR
EDGE OF WATER
(POND)
PROPOSED
CONTRACTOR
STAGING AREA
REMOVE UNCONSOLIDATED
MATERIAL AND UTILIZE FOR
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PROPOSED
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(TYP4)
HISTORIC
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CONSTRUCTION SEQUENCE:
1. Obtain NCDENR, USACE, & local authority approval for construction.
2. Notify NCDENR (Land Quality Section) if necessary, ten days prior to construction.
3. Locate existing utilities on site. Coordinate access, staging area and
and temporary stockpile areas with Owner and Engineer. Engineer to identify and mark
"limits of disturbance" within channel ---
4. Install temporary sediment & erosion control measures, access roads, channel access,
staging area, and temporary facilities.
NOTE: All installed temporary sediment and erosion control measures will be inspected
weekly or after a major rainfall event (> 0.5 Inches) by the Contractor. Upon
inspection, any necessary repairs will be performed by the Contractor.
5. Clear and grub in required areas for stream repair. Remove and stockpile top
soil in areas to be excavated. Stockpile in areas as Directed by
Owner / Engineer. Surround Stockpile Areas with 2 Rows of Silt Fence.
6. Perform stream bank repairs as shown on plans and directed by engineer.
Install in-stream structures and toe stabilization as directed by the
engineer at the time of construction. Contractor shall not cross "limits of disturbance"
without prior approval of the engineer.
7. Stabilize repaired bank zones (lower, mid-, and upper) as shown in details. Apply
temporary erosion control seeding measures to disturbed areas as final grading is
reached. Re-distribute topsoil, augment as necessary to meet planting specifications.
8. Perform tree and shrub planting as specified. Engineer to be notified prior
to planting observation to approve planting bed conditions and plant materials.
Tree and Shrub plantings may be delayed until Fall season.
9. Apply permanent seeding measures. Remove temporary sediment & erosion
control measures including construction entrance (if necessary).
10. Coordinate for walk-thru inspection with Owner, Engineer, and Agency
Representatives.
11. Plant all live stake plantings (and tree and shrub species if delayed) during Fall season.
FLOW
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GEOTEXTILE FABRIC
FOOTER
ROCKS
CHANNEL BED
PROFILE
TOP OF BANK OR BENCH
APPROX.
1/4 CHANNEL WID
NON-WOVEN
GEOTEXTILE FABRId
EDGE BANK OR BENCH II
20•-
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TIE TO
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ROCK VANE ARM STRUCTURE DETAIL
(NOT TO SCALE)
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UPPER BANK ZONE, OVER PLANT WITH SELECT
TREES SPECIES ON B'XB' SPACING
UPPER BANK AS SHOWN IN OPTION I
WIDTH OF BENCH VARIES 5' TO 10'
MINIMUM DESIRED FOR REPAIR
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STABILIZE AND PLANT BENCH
SIMILAR TO MID-BANK ZONE
EXISTING ERODED AND FAILED
CHANNEL BANK (TYP.)
NOTE:
1. RESTORE CHANNEL WOTH AT TOE OF SLOPE AS SHOWN ON PROPOSED
REPAIR PLAN,
Z BREAK PANT ON SLOPE (OR OUTER EDGE OF BENCH) FOR REPAIR AT
ELEV. Y2}.Q4 DEFINED BY 'BANK LOCATION' ON PLAN KEW.
3. DEPTH AND EXTENTS OF UNDERCUT TO BE DETERMINED BY ENGINEER AT
TIME OF CONSTRUCTION.
4. REPAIR MAY CE CONSTRUCTED WITH OR WITHOUT TOE STAI:LIZATION
DEPENDING ON SITE CONDITIONS AS DETERMINED BY THE ENG NEER.
S REPAIR TO BE CONSTRUCTED IN CONJUNCTION WITH ROCK VANE ARM
STRUCTURES AS SHOWN ON REPAIR PLAN.
6. LOWER BANK ZONE TO BE CONSTRUCTED USING RIVER BED BORROW
MATERIALSAS APPROVED BY THE ENGINEER, MID-, AND UPPER BANK ZONE TO
BE CONSTRUCTED USING OTHER APPROVED MATERIALS
7. BANK REPAIRS TO BE BENCHED INTO EXISTING FAILED SLOPE AS
DIRECTED BY THE ENGINEER AT THE TIME OF CONSTRUCTION.
REPAIR OPTION 1
(NOT TO SCALE)
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W.D-BANK ZONE OVER-PLANT PATH SELECT
SHRUB SPECIES ON 6'X6' SPACING
LOWM BANK ZONE, LIVE STAKE "TH SELECT
SPECIES SPACED AS IN DETAIL
1
SEED AND MULCH, USE EXCELSIOR
MATTING ON ALL SLOPES > 3H: IV
6' TOP SOIL, SEED AND MULCH EXCELSIOR
MATTING WITH ANCHOR STAPLES
3H
40
5' TOP SOIL SEED AND MULCH CF-7 COM
MATTING PATH ECOSTAKES TO TOP OF SLOPE
EXISTING ERODED AND FAILED
CHANNEL BANK (TYP.)
LOWER-BANK ZONE
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2H TOE STABILIZATION BOULDERS
NOTE:
I. RESTORE CHANNEL WIDTH AT TOE OF SLOPE AS SHOWN CN PROPOSED
REPAIR PLAN.
2. BREAK POINT ON SLOPE (OR OUTER EDGE OF BENCH) FOR REPAIR AT
ELEV. 101, DEFINED BY'BAIK LOCATION' ON PLAN KEW.
3. DEPTH AND EXTENTS OF UNDERCUT TO BE DETERMINED BY ENGINEER AT
TIME OF CONSTRUCTION.
A, REPAIR MAY BE CONSTRUCTED PATH OR WITHOUT TOE STAB`LIZAflON
DEPENDING ON SITE CONDITIONS AS DETERMINED BY THE ENGINEER
5. REPAIR TO BE CONSTRUCTED N CONJUNCTION WITH ROCK VANE ARM
STRUCTURES AS SHOWN ON REPAIR PLAN.
6. LOWER BANK ZONE TO BE CONSTRUCTED USING RIVER BED BORROW
MATERIALS AS APPROVED BY THE ENGINEER. MID-. AND UPPER BANK ZONE TO
BE CONSTRUCTEDUSING OTHER APPROVED MATERIALS.
7. BANK REPAIRS TO BE BENCHED INTO DaSTING FAILED SLOPE AS
DIRECTED BY THE ENGINEER AT THE TIME OF CONSTRUCTION.
REPAIR OPTION 2
(NOT TO SCALE)
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AND BACKFILL WITH COARSE (BED) MATERIAL
TOE STABILIZATION DETAIL
(NOT TO SCALE)
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FROM EXISTING ROAD
2"-3" COARSE AGGREGATE
(RAILROAD BALLAST) 10,
EXISTING ROAD, rte-
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FROM EXISTING ROAD
EXISTING CHANNEL BED
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CONTRACTOR TO CUT -
ACCE55 RAMP TO
SLOPE AS NEEDED FOR
EQUIPMENT ACCESS
MINIMUM 12" LAYER CLA55'A',
RIPRAP WITH MIN. 12 OZ. WOVEN
GEOTEXTILE FABRJC UNDERLAIN
4' 3G' MINIMUM
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EX15TING TOP OF BANK NOTE: CONTRACTOR TO REFRESH
STONE LAYER AND AUGMENT
CONTRACTOR TO CUT AS NECESSARY TO REDUCE
ACCESS RAMP TO EROSION AND SEDIMENTATION
SLOPE A5 NEEDED FOR
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NOTES:
I . A STABILIZED PAD OF CRUSHED STONE SHALL BE LOCATED WHERE
TRAFFIC WILL BE ENTERING OR LEAVING A CONSTRUCTION SITE TO OR
FROM AN EX15TING ROAD.
2. STONE TO BE 2 - 3 INCH WASHED STONE RAILROAD BALLAST.
3. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL
PREVENT TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC STREETS
OR EXISTING PAVEMENT. THI5 MAY REQUIRE PERIODIC TOP DRESSING
WITH ADDITIONAL STONE AS CONDITIONS DEMAND AND REPAIR AND/OR
CLEANOUT OF ANY MEASURES USED TO TRAP SEDIMENT.
4. ALL SEDIMENT SPILLED, DROPPED, WASHED OR TRACKED ONTO PUBLIC
STREETS MUST BE REMOVED IMMEDIATELY.
5. WHEN NECESSARY WHEELS MUST BE CLEANED TO REMOVE SEDIMENT
PRIOR TO ENTERING A PUBLIC STREET, WHEN WASHING 15 REQUIRED,
IT SHALL BE DONE ON AN AREA STABILIZED WITH CRUSHED STONE
WHICH DRAINS INTO AN APPROVED SEDIMENT BASIN.
EXACT LOCATION OF TEMPORARY CONSTRUCTION
ENTRANCE TO BE DETERMINED AT PRE-CONSTRUCTION
MEETING
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NOTES:
2" STEEL ANGLE
P05T SET MIN. 18"
INTO GROUND
8' MAX FOR STD. STRENGTH FABRIC
WITH WIRE MESH REINFORCEMENT
OR
G' MAX FOR EXTRA STRENGTH
FABRIC ,,.,O WIRE MESH
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SYNTHETIC
II FILTER FABRIC SHALL BE
u BACKFILLED A MIN. OF 8"
SILT FENCE
1. FILTER BARRIERS SHALL BE INSPECTED
IMMEDIATELY AFTER EACH RAINFALL AND
DAILY DURING PROLONGED RAINFALL.
REPAIR SHALL BE MADE AS NECESSARY.
2. FABRIC SHALL BE REPLACED PROMPTLY
IF FOUND TO BE IN DISREPAIR.
COIR MATTING
BASE FLOW
WATER ELEVATION
i Til I Ili E=1 '?N.
PROFILE VIEW
3. SEDIMENT DEPOSITS SHALL BE REMOVED
AFTER EACH STORM EVENT AND WHEN
DEPOSITS REACH APPROXIMATELY 113
HEIGHT OF BARRIER.
BANK OR BENCH
I I 112" ECO-STAKED
24" ECO-STAKED
94" FC
FRONT VIEW
• TRENCHED TOP OF MATTING TO A
DEPTH OF AT LEAST 12", STAKE
OR STAPLE IN PLACE, ? BACKFILL
TO DESIGN GRADE
• MINIMUM 24" ECO-STAKE50
INSTALLED ALONG TOE OF MATTING
(Intercept between water surface and bank)
• MINIMUM 2' CENTERS ALONG BOTTOM
• MINIMUM I' OVERLAP AT JOINING
SECTIONS OF COIR MATTING
COI R MATTING DETAIL
(NOT TO SCALE)
ECO-5TAKE0
• 12" ECO-5TAKE50 INSTALLED IN BANK
FLUSH WITH COIR MATTING ABOVE
BOTTOM ROW OF 24" ECO-5TAKE50
• ECO-5TAKE5(D SPACED AT
MAXIMUM 3' CENTERS (APPROX.)
BOTH DIRECTIONS
TEMPORARY SEEDING V/{fin
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more than 15 days should be temporarily seeded as 0
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progress in construction activity. Seeding and mulching shall z
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be done immediately following construction. All disturbed wh
areas shall be dressed to a depth of 8 inches. The top
3 inches shall be pulverized to provide a uniform seedbed.
Seeding
Seeding Dates Seeding Species Rate (Ibslacre)
May I - Aug. 15 German Millet 40 0
Aug. 15 - May I Rye (grain) GO v
Soil Amendments j 7-
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Follow recommendations of soil tests or apply 2,000 Ibslacre U
ground agricultural limestone and 750 Ibslacre 10-10-10 00 ® Z
fertilizer,
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Mulch =
Mulching shall consist of small grain straw applied at a rate =
of 70 lb5./1000 sq.ft. Mulched areas shall be mechanically I
tacked in place (or other approved tacking method). e
No asphalt shall be used for tacking. Use lute, excelsior 8
matting or similar material to cover exposed areas of 3
concentrated flow.
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SYNTHETIC FILTER FABRIC
ATTACHED TO POSTS WITH
APPROVED FASTENERS. PLACE
ON UPHILL SIDE OF FENCE.
POST
SYNTHETIC
FILTER
FABRIC
18" GROUND
MAX.
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EXCAVATE 8"x8" TRENCH UP5LOPE ALONG LINE
OF POSTS. EXTEND FILTER FABRIC INTO TRENCH,
BACKFILL TRENCH AND COMPACT SOIL
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TREES
5PECIE5 COMMON NAME TOTAL # 51ZE REMARC5
QUERCUS ALBA WHITE OAK TBD BARE ROOT UPPER BANK ZONE
PLANTANUS
ACCIDENTALIS AM, SYCAMORE TBD BARE ROOT UPPER BANK ZONE
QUERCUS
COCCINEA SCARLET OAK TBD BARE ROOT UPPER BANK ZONE
BETULA LENTA SWEET BIRCH TBD BARE ROOT UPPER BANK ZONE
LIRIODENDRON
TULIPFERA YELLOW POPLAR TBD BARE ROOT UPPER BANK ZONE
TSUGA
OCCIDENTALIS E. HEMLOCK TBD BARE ROOT UPPER BANK ZONE
BETULA
ALLEGHANIENSIS YELLOW BIRCH TBD BARE ROOT UPPER BANK ZONE
ACER RUBRUM RED MAPLE TBD BARE ROOT UPPER BANK ZONE
BETULA NIGRA RIVER BIRCH TBD BARE ROOT UPPER BANK ZONE
NOTE: '
TREE SPECIES TO BE RANDOMLY INTERMIXED ON 8'X8' SPACING
UTILIZING AT LEAST 5 Of THE 9 SPECIES LISTED ABOVE. MATERIAL
SOURCE AND DESIRED SUBSTATIONS TO BE APPROVED BY DESIGNER.
1 2 3
Open planting Place bare-root Close hole with
hole with Seedling in hole - Shovel or Auger-
Shovel or Auger root collar at no air space
surface around roots
BARE-ROOT SEEDLING
PLANTING DETAIL
(NOT TO SCALE)
TI
WOODEN ST/
SHRUBS
5PECIE5 COMMON NAME TOTAL # 51ZE REMARr5
CARPINUS
CAROLINIANA AMERICAN
HORNBEAM TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
HAMAMELIS
VIRGINIANA AMERICAN
NITCHHAZEL TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
ALNUS
SERRULATA BROOKSIDE
ALDER TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
LEUCOTHOE
FONTANESIANA HIGH
DOGHOBBLE TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
SALIX NIGRA BLACK WILLOW TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
CORNUS AMOMUM SILKY DOGWOOD TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
SALIX SERICEA SILKY WILLOW TBD BARE ROOT/POTTED MID-BANK ZONE & BENCH
NOTE:
SHRUB SPECIES TO BE RANDOMLY INTERMIXED ON G'XG' SPACING
UTILIZING AT LEAST 3 OF THE 7 SPECIES LISTED ABOVE. MATERIAL
SOURCE AND DESIRED SUBSTATIONS TO BE APPROVED BY DESIGNER.
LIVE STAKES TO CONSIST Of BLACK WILLOW, SILKY DOGWOOD AND
SILKY WILLOW PLANTED AS SHOWN IN DETAIL ALONG LOWER BANK ZONE.
TREE SHELTER
WI BASE APPROX.
I" INTO GROUND
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TREE SHELTER DETAIL
TO BE INSTALLED ON ALL I5AKt-KUUI
AND CONTAINERIZED PLANTED TREES
(NOT TO SCALE)
BASE FLOW
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PROFILE VIEW
SLOPE BREAK OR BENCH
• LIVE STAKES INSTALLED IN BANK
WITH DEAD-BLOW HAMMER
• 4/5 Of STAKE IN GROUND
• BUDS ORIENTED UPWARDS
• 3' CENTERS (APPROX.)
• CUT EXPOSED END OF LIVE STAKE
AFTER INSTALLATION If DAMAGED
DUE TO INSTALLATION
(i.e. damaged bark, Split ends, etc.)
LIVE STAKE PLANTING DETAIL
(NOT TO SCALE)
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[Fwd: [Fwd: [Fwd: STream Clearing Activities]]]
Subject: [Fwd: [Fwd: [Fwd: STream Clearing Activities]]]
From: Cyndi Karoly <cyndi.karoly@ncmail.net>
Date: Wed, 16 Mar 2005 15:58:57 -0500
To: Laurie J Dennison <Laurie.J.Dennison@ncmail.net>
fyi - so please note that fees are waived when you create these files - perhaps a
brief handwritten note in the file jacket, or we can add.a copy of this message
Subject: [Fwd: [Fwd: STream Clearing Activities]]
From: Tom Reeder <tom.reeder@ncmail.net>
Date: Wed, 16 Mar 2005 15:43:18 -0500
To: Cyndi Karoly <cyndi.karoly@ncmail.net>
Cyndi - In answer to your question yesterday it appears that the fees are being
waived for the EWP associated 401s.
Subject: [Fwd: STream Clearing Activities]
From: Alan Klimek <alan.klimek@ncmail.net>
Date: Wed, 16 Mar 2005 15:37:40 -0500
To: Tom Reeder <Tom.Reeder@ncmail.net>
Yes, the fees are being waived. See attachment.
Alan
-------- Original Message --------
Subject:STream Clearing Activities
Date:Mon, 28 Feb 2005 09:40:08 -0500
From:"Robin W. Smith" <robin.w.smith(cDncmail.net>
Organization:NC DENR
To:Alan Klimek <Alan.Klimek a,ncmail.net>, Jim Simons <Jim.Simons(a,ncmail.net>,
David Vogel <David.Vogel(o1,,ncmail.net>
CC:Johanna Reese <Johamla.ReesePncmail.net>, Nann Guthrie
<Nann. Guthriep,ncmail.net>
LA l: Attached is an electronic copy of the letter and information sheet
sent to the 19 counties and one town that have contracts with NRCS for
stream clearing projects. Those letters went out over the Secretary's
signature on Friday. We will hand-deliver a memo containing the same
basic information to the mountain area legislators tomorrow. We are
also working with the Governor's Office on a news release; I am not sure
how soon that will go out. Give me a call if you have any questions.
Thanks for working toward getting meetings set up. Robin.
1 of) 1/170001 6•46 AM
[Fwd: [Fwd: [Fwd: STream Clearing Activities]]]
Robin W. Smith <robin.w.smith(r'?ncmail.net>
Assistant Secretary of Planning & Policy
Office of the Secretary
NC DENR
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2 of 2 3/17/2005 6:46 AN
February 25, 2005
Page 1 of 2
February 25, 2005
RE: Emergency Watershed Protection Stream-Clearing Projects
Dear
I know that County experienced stream damage as a result of the fall
hurricanes. Our department would like to work close ' ly with your county to insure that
stream restoration projects receiving state and federal funds under the Emergency
Watershed Protection (EWP) program move as smoothly as possible through the
environmental review and permitting process. I have enclosed for your information a
brief summary of the types of permits and approvals that may be required for these
projects. For projects that involve work directly affecting the streambed, the United
States Army Corps of Engineers will be the primary environmental permitting agency.
For those projects, our staff in the Division of Water Quality and the Division of Land
:Resources play a supporting role and issue related state approvals.
f
I have asked our staff to meet with all of the western counties, either individually or in
small groups, to talk about each county's proposed stream restoration projects and answer
your questions about permit requirements. Our staff will ask the Corps of Engineers and
Soil and Water Conservation staff to join in those meetings in an effort to put together a
plan of action for reviewing and approving stream restoration projects as quickly as
possible. You should receive a telephone call from DENR staff soon to talk about a date
and time that would be convenient to meet and talk about your projects.
I have also directed our staff to waive fees for state water quality certifications (under
Section 401 of the Clean Water Act) and for approval of erosion and sedimentation
February 25, 2005
Page 2 of 2
control plans for stream-clearing projects funded under EWP. Fees will be waived for all
EWP permit s requested by September 1, 2005.
I hope these efforts will ease the burden on county governments already challenged by
the demands of reconstruction and recovery. If we can help you in any other way, please
do not hesitate to call. I have asked Assistant Secretary Robin Smith to be a primary
contact on these projects for DENR; you can reach Ms. Smith at (919) 715-4141. The
enclosed information sheet also provides contact information for DENR staff in both the
Asheville and Winston-Salem Regional Offices and for the Corps of Engineers office in
Asheville.
Sincerely,
William G. Ross, Jr.