20031221 Ver 1_COMPLETE FILE_20031003

I&
EROSION CONTROL
NARRATIVE
Tributary to Futch Creek Stream and Wetland Enhancement Project
New Hanover County, North Carolina
Prepared by:
8000 Regency Parkway
Suite 200
B U C K Cary, North Carolina 27511
Ar Phone: [phone]
Fax: [phone]
www. buckengin eering. com
July 2003
Tributary to Futch Creek Erosion Control Narrative
Introduction
This narrative is submitted as part of the proposed Sediment and Erosion Control Plan for
the Tributary to Futch Creek Stream and Wetland Enhancement Project. The construction
of the project will involve the sloping back of one stream bank, the installation or Cross-
Vane and Step Pool structures and the enhancement of 2 acres of an existing bottomland
wetland.
Project Description
New Hanover County proposes to stabilize and enhance approximately 1,600 feet of
stream and enhance 2 acres of wetlands for water quality improvement purposes. The
stream that runs through the site is an unnamed tributary to Futch Creek. In its existing
condition, the tributary is an incised, channelized stream that provides drainage for the
surrounding area. The goal of the project is to stabilize the stream as a means of
controlling erosion and to reduce the amount of sediment now entering the tributary to
Futch Creek. Two acres of an existing wetland ecosystem located just below the
tributary will be enhanced via planting. Depending upon site conditions and the degree of
existing disturbance, some minor earthwork may be proposed for the enhanced area.
Specifically, existing spoil piles and/or berms may be reshaped to provide a more natural
topography and flow regime through the enhanced wetland area. By stabilizing the bed
of the stream, increasing the flood prone area, reducing the slope of the stream channel,
and allowing the water to flow through a dense stand of wetland vegetation, water quality
will be improved as sediment and other particles settle out in the slower moving water.
Chemical activity associated with wetland ecosystems will further improve water quality.
Watershed size (i.e. drainage area) at the outlet of the project is approximately 0.3 square
miles. Most drainage originates off-site from neighboring lands and roadways upstream.
The proposed design involves the stabilization of the stream channel by installation of
cross-vane structures, an increase in the flood prone area via grading, and the
enhancement of 2 acres of wetlands.
This stream stabilization project area is located within a larger site development project.
Sagewood at Plantation Landing is a single and multi-family housing development that
encompass a total of 44.2 acres. This development surrounds the tributary to Futch Creek
Stream and Wetland Enhancement Project. A second phase, Future Phases at Plantation
Landing, is in the early stages of planning and will ajoin the wetland enhancement area.
Site Conditions
The Futch Creek watershed is located in northeastern New Hanover County,
approximately 8 miles southeast of Castle Hayne. Futch Creek begins as a series of
channelized ditches east of Highway 17 and flows approximately 3 miles to the
Intracoastal Waterway and Middle Sound, approximately seven miles north of
Wrightsville Beach. The project reach begins just south of Highway 17, and extends
downstream to existing wetland areas. The total watershed area at the downstream end of
the project reach is approximately 0.3 square miles. Futch Creek is classified as SA and
HQW by the North Carolina Division of Water Quality. The "SA" designation indicates a
tidal salt water system suitable for marketable shell fishing. All waters designated as
"SA" are also minimally designated as "HQW," or High Quality Waters.
Soil survey data were obtained for the project site from the Natural Resource
Conservation Service (NRCS, 1977). Based on this information, the northeastern
streambank of Tributary to Futch Creek and the adjoining property are mapped as the
Baymeade (Be), Johnston (JO), Leon (Le), and Murville (Mu) series. The southwestern
bank of Tributary to Futch creek is primarily Johnston soil with upslope soils mapped as
Kenansville (Ke), Lynn Haven (Ly) and Rimini (Rm). One lobe of Rimini soil exists
upstream of Tributary to Futch Creek on the project property. Of the soils series
identified by the county soil survey, the Johnston, Leon, Murville, and Lynn Haven series
are considered hydric by the Natural Resource Conservation Service (NRCS, 1995).
Erosion and Sedimentation Control Measures
Erosion control methods to be used in the project include Sediment Fence (Silt Fence);
Temporary Sediment Traps; Special Stilling Basins; Temporary Seeding and Mulching,
Permanent Seeding, and Coconut (Coir) Fiber Erosion Control Matting. All sediment and
erosion control measures are to be built according to the plans and specifications.
Additionally, a temporary Gravel Construction Entrance/Exit and a Stream Crossing will
be permitted, installed, and maintained as part of the larger development associated with
Sagewood at Plantation Landing.
Channel grading will occur in Phases as identified on the plan sheets. Each phase, or
section, of channel will be isolated by the use of impermeable dikes and the section
dewatered with a pump around operation. Water pumped from the isolated section of the
channel will be filtered through a special stilling basin to remove sediment. Silt checks
will be constructed at regular intervals within the stream channel at locations shown on
the plans to trap sediment.
Material excavated from the channel banks will be temporarily stock piled to ensure
balance between cut and fill. Stockpiles will be located as shown on the plans and silt
fences will be used to prevent erosion of the stockpiles toward the open channels on site.
Excavated material that exceeds cut/fill needs will be moved to a central stockpile area
within the Sagewood at Plantation Landing site development project area. This soil will
be used on site in the overall site grading process.
Design Standards
Erosion control practices, methods, and procedures described in these plans and
specifications are based on those presented in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
Maintenance Plan
All temporary erosion and sediment control practices will be evaluated for stability and
operation by qualified personnel on a daily basis. Any needed repairs will be performed
immediately to maintain all practices as designed. The project engineer will be
responsible for the maintenance of temporary on-site erosion control measures:
Buck Engineering
Douglas Smith - Project Manager
8000 Regency Parkway, Suite 200
Cary, NC 27511
[phone]
The maintenance requirements for permanent measures will be the responsibility of the
land owner:
New Hanover County
c/o Chris O'Keefe
New Hanover County Planning Department
230 Marketplace Drive, Ste. 150
Wilmington NC 28403
[phone]
General Construction Sequence
The following construction sequence shall be used during implementation of the plan.
1. The Contractor will use the existing construction access, if available. If a
stabilized construction entrance is not available, the contractor shall prepare
one in accordance with NC Erosion and Sediment Control Planning and
Design Manual: Temporary Gravel Construction Entrance/Exit: 6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as
shown in the plans. If necessary, erect any safety fences, silt fences, or
barriers. Stockpile materials that will be needed during the initial stages of
construction.
3. The Contractor shall install a temporary sediment trap at the downstream most
location as identified on the plans.
4. The Contractor will use the existing stream crossing, if available. If a stream
crossing is not available, the contractor shall prepare one in accordance with
NC Erosion and Sediment Control Planning and Design Manual: Temporary
Stream Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around
operations for Phase 1 at locations specified on the plans. The portion of the
channel isolated shall be dewatered and the removed water shall flow through
a special stilling basin according to project special provisions.
6. The Contractor shall begin excavation of the stream channel and bank.
Excavation shall begin on the upstream end and work downstream.
7. Once a section of channel has been excavated to design grades, instream
structures, matting and plants shall be installed in that section per the direction
of the Engineer/Project Manager and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream
coffer dam, and finally the pump around operation, thereby allowing water to
flow into the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the
Contractor may begin construction of the next section (Phases 2 through 7) of
the channel beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth
and final Phase of the project. Depending upon site conditions and the degree
of existing disturbance, some minor earthwork may be proposed for the
enhanced area. Specifically, existing spoil piles and/or berms may be
reshaped to provide a more natural topography and flow regime through the
enhanced wetland area.
11. Once a stream or wetland work Phase is complete the Contractor will apply
temporary seeding, permanent seeding, and mulch to any other areas disturbed
during construction. Permanent seeding mixtures shall be applied as shown
on the vegetation plan. Temporary seeding shall be applied in all areas
susceptible to erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas)
such that ground cover is established within 30 working days following
completion of any phase of grading. Permanent ground cover shall be
established for all disturbed areas within 30 working days or 120 calendar
days (whichever is shorter) following completion of construction.
12. The Contractor shall insure that the site is free of trash and leftover materials
prior to demobilization of equipment from the site.
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EXHIBIT D: GENERAL CONSTRUCTION SEQUENCE
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
The following construction sequence shall be used during implementation of the plan.
1. The Contractor will use the existing construction access, if available. If a
stabilized construction entrance is not available, the contractor shall prepare one
in accordance with NC Erosion and Sediment Control Planning and Design
Manual: Temporary Gravel Construction Entrance/Exit: 6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as shown in
the plans. If necessary, erect any safety fences, silt fences, or barriers. Stockpile
materials that will be needed during the initial stages of construction.
3. The Contractor shall install a temporary sediment trap at the downstream most
location as identified on the plans.
4. The Contractor will use the existing stream crossing, if available. If a stream
crossing is not available, the contractor shall prepare one in accordance with NC
Erosion and Sediment Control Planning and Design Manual: Temporary Stream
Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around operations
for Phase 1 at locations specified on the plans. [Limits of each phase are
identified on the erosion control measures plan sheets.] The portion of the
channel isolated shall be dewatered and the removed water shall flow through a
special stilling basin according to project special provisions.
6. The Contractor shall begin excavation of the stream bank. Excavation shall begin
on the upstream end and work downstream.
7. Once a section of bank has been excavated to design grades, instream structures,
matting and plants shall be installed in that section per the direction of the
Engineer/Project Manager and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream coffer
dam, and finally the pump around operation, thereby allowing water to flow into
the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the Contractor
may begin construction of the next section (Phases 2 through 7) of the channel
beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth and
final Phase of the project. Depending upon site conditions and the degree of
existing disturbance, some minor earthwork may be proposed for the enhanced
area. Specifically, existing spoil piles and/or berms may be reshaped to provide a
more natural topography and flow regime through the enhanced wetland area.
11. Once a stream or wetland work Phase is complete the Contractor will apply
temporary seeding, permanent seeding, and mulch to any other areas disturbed
during construction. Permanent seeding mixtures shall be applied as shown on
the vegetation plan. Temporary seeding shall be applied in all areas susceptible to
erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas) such that ground
cover is established within 30 working days following completion of any phase of
grading. Permanent ground cover shall be established for all disturbed areas
within 30 working days or 120 calendar days (whichever is shorter) following
completion of construction.
12. The Contractor will install the interpretive sign at a location identified by the
Project Engineer/Manager. The sign will be provided to the contractor by the
client.
13. The Contractor shall insure that the site is free of trash and leftover materials prior
to demobilization of equipment from the site.
Item Description Quantity Unit Unit
Price Amount Bid
C Mobilization/Demobilization 1 LS
E1 Temp Silt Fence 400 LF
E2 Filter Fabric, Type 2 Non-
Woven
750
Sy
E3 Special Stilling Basin 8 EA
E4 Diversion Pump and System 1 LS
F1 Temp Seeding (Rye Grain) 280 LBS
F2 Seeding and Mulching 2.15 ACRES
G Coconut (Coir ) Fiber Matting 10,500 SY
H1 Excavation, Fill, Grading 2300 LS
H2 Site Preparation 1 LS
Il Stone Boulders (4' x 3' x 2') 440 TONS
I2 Class 1 Stone, Plain Ri -ra 80 TONS
13
r Class A Stone, Plain Rip-rap -ra 45.00 TONS
14 Class -B Stone, Plain Rip-rap -ra 12 TONS
I5 #57 -Stone loo TONS
J 1 Tree and Shrub Plantings 1450 EACH
J2 Wetland Vegetation Plantings 525 EACH
K Live Stakin 1200 EACH
L -Interpretive Sign Installation 1 J LS
Office Use Only: Form Version May 2002
USACE Action ID No. DWQ No.
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1. Processing
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ? Riparian or Watershed Buffer Rules
? Section 10 Permit ? Isolated Wetland Permit from DWQ
® 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 13
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 (verify availability with NCWRP prior to submittal of PCN), complete
section VIII and check here: ?
If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ?
II. Applicant Information NCT?ANnS /401 G®??? IF
1. Owner/Applicant Information C f ?'I !? tl U
Name: New Hanover County 0 C T ? 3 200;3
Mailing Address: New Hanover Count Planning De artme
Attn: Mr. Chris O'Keefe : * , V01
230 Marketplace Drive, Suite 150
Wilmington NC 28403
Telephone Number: 910-798-7444 Fax Number: 910-798-7053
E-mail Address: [e-mail]
2. Agent/Consultant 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: Douglas Smith
Company Affiliation: Buck Engineering
Mailing Address: 8000 Regency Parkway, Suite 200
Cary NC 27511
Telephone Number: 919-463-5488 Fax Number:-919-463-5490
E-mail Address: dsmith@bucken ing eering.com
Page 1 of 8
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: Tributary to Futch Creek, Stream and Wetland Enhancement Work
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): Not Yet Recorded
4. Location
County: New Hanover Nearest Town: Wilmington
Subdivision name (include phase/lot number): Sagewood at Plantation Landing
Directions to site (include road numbers, landmarks, etc.):
Highway 17 North to Futch Creek Road. Right on Futch Creek Road, Development of left.
5. Site coordinates, if available (UTM or Lat/Long):
(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. Property size (acres): approx. 45 acres
7. Nearest body of water (stream/river/sound/ocean/lake): Futch
8. River Basin: Cape Fear
(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/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: Site is currently being cleared for development.
Page 2 of 8
10. Describe the overall project in detail, including the type of equipment to be used:
Excavation and stabilization (with matting and vegetation) of one eroding stream bank.
Installation of natural channel design structures, specifically rock cross-vanes to prevent
further downcutting of the streambed. Additional wetland species plantings. Vast majority
of the work is completed with a track hoe and manual labor.
11. Explain the purpose of the proposed work: channel and bank stabilization and reduction in
soil loss through erosion control. Overall improvement of water quality. Enhancement of
the natural wetland and stream ecosystem.
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.
None associated with this work.
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 associated with this work.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein, and must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a
delineation map, whether or not impacts are proposed to these systems. Wetland and stream
evaluation and delineation forms should be included as appropriate. Photographs may be
included at the applicant's discretion. If this proposed impact is strictly for wetland or stream
mitigation, list and describe the impact in Section VIII below. If additional space is needed for
listing or description, please attach a separate sheet.
Page 3 of 8
1. Provide a written description of the proposed impacts: Temporary diversion of the
stream flow, via pump and hose, during construction. Clearing and excavation of one
streambank to be stabilized and replanted.
2. Individually list wetland impacts below:
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***

1 Enhancement of
hydrology and
planting of
vegetation
2
No
In-line
Emergent/bottomland
hardwood

* 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 http://www.fema.gov.
*** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only).
List the total acreage (estimated) of all existing wetlands on the property: 2
Total area of wetland impact proposed: 2
3. Individually list all intermittent and perennial stream impacts below:
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 )
1 stabilization 1645 Tributary to Futch
Creek 2 feet Perennial
2 stabilization 30 Futch Creek 3 feet 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.gov. Several intemet sites also allow direct download and printing of USGS snaps (e.g., www.topozone.com,
www.niapguest.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 1,675
Page 4 of 8
4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.) below:
Open Water Impact
Site Number
(indicate on ma)
Type of Impact* Area of
Impact
(acres) Name of Waterbody
(if applicable) Type of Waterbody
(lake, pond, estuary, sound,
bay, ocean, etc.)
None

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging,
flooding, drainage, bulkheads, etc.
5. 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.
Impacts are central to the nurnose of the nroiect, which is to provide a more stable channel
and a more appropriate cross-sectional form. Impacts will be very temporary and only that
portion which can be stabilized by the end of the work day will be disturbed.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
Page 5 of 8
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.ne.us/ncwetlands/strmgide.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.
Not applicable
2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at
[phone] to determine availability and to request written approval of mitigation prior
to submittal of a PCN. For additional information regarding the application process for the
NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/w!P/index.htm. If use of
the NCWRP is proposed, please check the appropriate box on page three and provide the
following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Page 6 of 8
IX. Environmental Documentation (required by DWQ)
Does the project involve an expenditure of public (federal/state) funds or the use of public
(federal/state) 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 [phone] to review current thresholds for environmental documentation.
Yes ? No
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 (required by DWQ)
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 ® If you answered "yes", provide the following information:
Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer
mitigation is required calculate the required amount of mitigation by applying the buffer
multipliers.
Zone* Impact
(square feet) Multiplier Required
Mitigation
1 3
2 1.5
Total
* Zone t extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
Page 7 of 8
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 2B .0242 or .0260.
Riparian buffer restoration enhancement and preservation are an inherent goal of this project.
XI. Stormwater (required by DWQ)
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.
Not applicable
XII. Sewage Disposal (required by DWQ)
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.
Not applicable
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application?
Yes ? No
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).
It is imperative the construction of this project coincide with the overall site development, which
is currently underway.
to.
A ant/Agent's Sigiia&re Date
(Agent's sigAture is valid only if an authorization letter from the applicant is provided.)
Page 8 of 8
TRIBUTARY TO FLITCH CREEK
STREAM AND WETLAND ENHANCEMENT
PROJECT
New Hanover County, North Carolina
CONSTRUCTION BID PACKAGE

0r r # 2uo;?
Prepared for:
New Hanover County lATERQ!.!AL1TY,3:7: j%i
Prepared by:
Buck Engineering PC
8000 Regency Parkway, Suite 200
Cary, NC 27511
[phone]
September, 2003
New Hanover County Contract #03-0300
TABLE OF CONTENTS
FLITCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
SCOPE OF WORK ................................................................................................. ........................ 3
3
NOTICE TO BIDDERS .......................................................................................... ........................
5
EXHIBIT A: CONTRACT BID FORM ................................................................. ........................
EXHIBIT B: CONTRACT TERMS AND CONDITIONS AND INSURANCE
REQUIREMENTS .......................................................................... ........................ 7
34
EXHIBIT C: DIRECTIONS TO PROJECT SITE .................................................. ......................
EXHIBIT D: GENERAL CONSTRUCTION SEQUENCE .................................. ......................34
EXHIBIT E: PROJECT SPECIFICATIONS .......................................................... ......................37
A. GENERAL SPECIFICATIONS ..................................................................... ......................37
37
.......................................................................
B. CONSTRUCTION SURVEY ........ ..
........""
37
.............................................
MOBILIZATION AND DEMOBILIZATION
C .....
.....
.
D. SAFETY FENCE .......................................................................................... ....................... 39
39
POLLUTION CONTROL STRUCTURES ...................................................
E .......................
.
TEMPORARY SEEDING, PERMANENT SEEDING AND Mulching ......
F ....................... 45
.
COCONUT (COIR) FIBER MATTING .......................................................
G .......................47
.
EXCAVATION, FILL, GRADING, AND SITE PREPARATION .............
H .......................49
.
1. STONE ..........
.............................................................................................. .......................50

51
J. PLANTINGS .................................................................................................. .......................
54
K..LIVE STAKING .......................................................................................... .......................
55
INTERPRETIVE SIGN INSTALLATION ...................................................
L .......................
.
APPENDIX A: SELECTED EROSION CONTROL PRACTICES COPIED FR OM THE NC
SEDIMENT AND EROSION CONTROL MANUAL ................ ........................ 56
2
New Hanover County Contract #03-0300
NOTICE TO BIDDERS
SCOPE OF WORK
1. The scope of work is for the construction phase of the enhancement of streams and
wetlands at the Tributary to Futch Creek. The Owner is New Hanover County. The
Engineer/Project Manager is Buck Engineering PC.
2. As part of the scope of work, the Contractor will excavate one bank of the existing
channel of Futch Creek, install in-stream structures, reforest the banks and enhance an
existing wetland area by planting and minor earthwork. Work shall be in accordance with
the construction plans, specifications, and under the observation of the Engineer/Project
Manager. The Contractor will install erosion control materials such as silt fence,
broadcast seed, fiber matting, and bare root, container, and live stake plantings. The
Contractor will build in-stream structures at locations within the new stream channel as
shown on the construction plans and as indicated by the Engineer/Project Manager. All
work will follow the construction plans and project specifications and will be observed
by the Engineer/Project Manager. The Engineer/Project Manager will accept or reject all
or portions of the work. The attention of the Contractor is directed to Sheet 2 of the
construction plans which specifies the sequence of construction that is to be followed by
the Contractor in providing the scope of work.
3. Time is of the essence regarding completion of the construction. Construction is
scheduled to begin (to be determined), 2003, subject to final approvals by all applicable
regulatory agencies, and construction activities must be completed by Contractor no later
than (to be determined), 2003. Preference will be given to Contractors that demonstrate
the ability to finish the project in a timely manner.
NOTICE TO BIDDERS
Two copies of the Contractor's proposal for this scope of work should be sent to:
Doug Smith
Buck Engineering PC
8000 Regency Parkway, Suite 200
Cary, NC 27511
Ph: 919-463-5488 Fax: [phone]
2. Bids will be received up to 5:00 PM, on (to be determined), 2003. The Owner
anticipates that a successful bid will be chosen by (to be determined), 2003. Complete
plans, specifications and contract documents are enclosed with this bid package.
Prospective bidders must attend a pre-bid conference and Site visit at 10:00 AM on (to
be determined), 2003 (map and directions are attached hereto as Exhibit Q. The pre-bid
meeting is required and Contractors may not bid unless they attend.
3
New Hanover County Contract #03-0300
4. Contractors are hereby notified that they must have proper licenses under the State laws
governing their respective trades.
5. In undertaking the scope of work, the Contractor will strictly adhere to all permit and
regulatory agency requirements applicable to the scope of work and the Contractor will
be liable to the Owner for all costs incurred by the Owner resulting from the Contractor's
failure to adhere to such requirements.
6. No bid may be withdrawn after the opening of bids for a period of 30 days. The Owner
reserves the right to reject any or all bids.
7. Proposals must include the form attached hereto as Exhibit A, with all blank spaces for
bids properly filled in and all signatures properly executed.
8. The Owner's standard terms and conditions of purchase for construction services, as
attached hereto as Exhibit B, will apply.
9. As a condition of final payment, the Contractor must submit a final release of liens.
10. As part of its proposal, the Contractor must submit a summary of qualifications,
including a list of references for previous contracts of a similar nature.
11. As part of its proposal, the Contractor must submit a copy of its most recent financial
statement and certification of its insurance coverage.
12. The Contractor will submit monthly invoices to the Owner on a percent complete basis.
Percent complete assessments will be subject to the review and approval of the
Engineer/Project Manager. Approved invoices will be paid by the Owner within 30
calendar days from receipt.
4
New Hanover County Contract #03-0300
EXHIBIT A: CONTRACT BID FORM
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
Page 1 of 2
Item Description Quantity Unit Unit
Price Amount Bid
C Mobilization/Demobilization 1 IS
E1 Temp Silt Fence 400 LF
E2 Filter Fabric, Type 2 Non-Woven 750 SY
E3 Special Stilling Basin 8 EA
E4 Diversion Pump and System 1 LS
F1 Temp Seeding (Rye Grain) 280 LBS
F2 -
Seeding and Mulching 2.15 ACRES
G Coconut (Coir ) Fiber Matting 10,500 SY
H1 Excavation, Fill, Grading 1 LS
H2 Site Preparation 1 LS
11 Stone Boulders (4' x 3' x 2') 440 TONS
12 Class 1 Stone, Plain Rip-rap 80 TONS
13 Class A Stone, Plain Rip-rap 45.00 TONS
14 Class B Stone, Plain Rip-rap 12 TONS
15 #57 Stone 100 TONS
J 1 Tree and Shrub Plantings 1450 EACH
J2 Wetland Vegetation Plantings 525 EACH
K Live Staking 1200 EACH
L -Interpretive Sign Installation 1 LS
TOTAL AMOUNT OF BID (ITEMS C THRU L) :
New Hanover County Contract #03-0300
EXHIBIT A: CONTRACT BID FORM
FLITCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
Page 2 of 2
Number and composition
of crews
Subcontractors
Start date
Estimated completion date
Measures to insure
timely completion
Respectively submitted this day of 2003.
(Name of firm or corporation making bid)
(License Number)
(Classification)
Witness: Signature:
Title:
(Owner, Partner, Pres. or VP)
Address:
(Federal ID Number)
(Limitation)
6
New Hanover County Contract #03-0300
EXHIBIT B: CONTRACT TERMS AND CONDITIONS AND INSURANCE
REQUIREMENTS
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
New Hanover County Contract #03-0300
EXHIBIT D: GENERAL CONSTRUCTION SEQUENCE
FLITCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
The following construction sequence shall be used during implementation of the plan.
1. The Contractor will use the existing construction access, if available. If a
stabilized construction entrance is not available, the contractor shall prepare one
in accordance with NC Erosion and Sediment Control Planning and Design
Manual: Temporary Gravel Construction Entrance/Exit: 6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as shown in
the plans. If necessary, erect any safety fences, silt fences, or barriers. Stockpile
materials that will be needed during the initial stages of construction.
3. The Contractor shall install a temporary sediment trap at the downstream most
location as identified on the plans.
4. The Contractor will use the existing stream crossing, if available. If a stream
crossing is not available, the contractor shall prepare one in accordance with NC
Erosion and Sediment Control Planning and Design Manual: Temporary Stream
Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around operations
for Phase 1 at locations specified on the plans. [Limits of each phase are
identified on the erosion control measures plan sheets.] The portion of the
channel isolated shall be dewatered and the removed water shall flow through a
special stilling basin according to project special provisions.
6. The Contractor shall begin excavation of the stream bank. Excavation shall begin
on the upstream end and work downstream.
7. Once a section of bank has been excavated to design grades, instream structures,
matting and plants shall be installed in that section per the direction of the
Engineer/Project Manager and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream coffer
dam, and finally the pump around operation, thereby allowing water to flow into
the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the Contractor
may begin construction of the next section (Phases 2 through 7) of the channel
beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth and
final Phase of the project. Depending upon site conditions and the degree of
existing disturbance, some minor earthwork may be proposed for the enhanced
area. Specifically, existing spoil piles and/or berms may be reshaped to provide a
more natural topography and flow regime through the enhanced wetland area.
It. Once a stream or wetland work Phase is complete the Contractor will apply
temporary seeding, permanent seeding, and mulch to any other areas disturbed
during construction. Permanent seeding mixtures shall be applied as shown on
the vegetation plan. Temporary seeding shall be applied in all areas susceptible to
erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas) such that ground
35
New Hanover County Contract #03-0300
cover is established within 30 working days following completion of any phase of
grading. Permanent ground cover shall be established for all disturbed areas
within 30 working days or 120 calendar days (whichever is shorter) following
completion of construction.
12. The Contractor will install the interpretive sign at a location identified by the
Project Engineer/Manager. The sign will be provided to the contractor by the
client.
13. The Contractor shall insure that the site is free of trash and leftover materials prior
to demobilization of equipment from the site.
36
New Hanover County Contract #03-0300
EXHIBIT E: PROJECT SPECIFICATIONS
FLITCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
A. GENERAL SPECIFICATIONS
The Contractor is required to install instream structures using a track hoe with a
hydraulic thumb of sufficient size and capability to manipulate boulders larger
than 4 feet x 3 feet x 2 feet (up to a maximum of 5 tons). The Contractor will be
required to provide, at a minimum, one track hoe with an operator at all times
during construction of the stream channel. The track hoe must have a hydraulic
thumb. A loader with an operator is strongly recommended, as well. In general,
one operator will excavate and shape the new channel and install instream
structures and bank stabilization practices. The loader shall haul excess soil to the
final location shown on the plans. A labor crew shall install seeding, matting and
plantings immediately following completion of a Phase by the heavy equipment.
Construction is scheduled to begin (to be determined), 2003 and to be completed
no later than (to be determined), 2003.
B. CONSTRUCTION SURVEY
The construction survey will be performed by Buck Engineering and shall include
location and layout of structures, slope and bench limits and wetland features. The
Contractor is not required to provide construction surveying or layout services
and will not bid on this item. However, the Contractor is required to keep laser
level equipment, along with a competent person skilled in its use, onsite for
maintaining grades.
C. MOBILIZATION AND DEMOBILIZATION
SCOPE
The work shall consist of the mobilization and demobilization of the Contractor's
forces and equipment necessary for performing the work required under the
contract. This work shall not include mobilization and demobilization for specific
items of work for which payment is provided elsewhere in the contract.
Mobilization will not be considered as work in fulfilling the requirement for
commencement of work.
EQUIPMENT AND MATERIALS
Mobilization shall include all activities and costs for transportation of personnel,
equipment, and operating supplies to the site; establishment of offices, and other
necessary facilities for the Contractor's operations at the site; premiums paid for
performance and payment bonds, including coinsurance and reinsurance
agreements as applicable; and other items as specified in this specification.
37
New Hanover County Contract #03-0300
Demobilization shall include all activities and costs for transportation of
personnel, equipment, and supplies not included in the contract from the site;
including the disassembly, removal and site clean up for this contract.
This work under Section C includes mobilization and demobilization required by
the contract at the time of the award. If additional mobilization and
demobilization activities and costs are required during the performance of the
contract as a result of the changed, deleted, or added items of work for which the
Contractor is entitled to an adjustment in contract price, compensation for such
costs will be included in the price adjustment for the item or items of work
changed or added.
METHODS
Items of work to be performed in conformance with these specification and
construction details, therefore, are:
1) This item shall consist of all work necessary to mobilize and demobilize
construction equipment as described above.
2) The Contractor is required to properly identify and secure the construction
accesses, staging areas, and material handling areas. Prior to construction
activities, the Contractor shall identify and mark boundaries of the staging
area as directed by the Engineer/Project Manager. Acceptable materials
for identifying the construction areas include highly visible tape and safety
fencing.
3) Stockpile all construction materials, including boulders, riprap, stone,
erosion control materials, etc. in the staging area. Any soil materials that
are stockpiled shall have a silt fence properly installed to ensure materials
are contained. Silt fence installation specifications are provided in Section
E: POLLUTION CONTROL and will not be bid under this section.
4) The Contractor shall provide watertight tanks or barrels sealed with plastic
sheets to be used to dispose of chemical pollutants, such as drained
lubricating or transmission oils, greases, soaps, concrete mixer wash
water, asphalt, etc., produced as a by-product of the construction work. At
the completion of construction, facilities shall be disposed of without
causing pollution.
5) Chemical toilets shall be placed at least 100 feet from streams, in the
staging area, and away from heavy equipment. At the completion of
construction work, facilities shall be disposed of without causing
pollution.
6) The Contractor will identify all underground and aboveground utilities and
is responsible for ensuring that these utilities are not damaged during
construction. The Contractor will promptly notify the project Engineer
Project Manager if there are conflicts between the utilities and the design.
38
New Hanover County Contract #03-0300
BASIS OF PAYMENT
Mobilization and demobilization activities as described above shall be paid for on
a lump sum basis. Half the lump sum will be payable following mobilization and
the remaining half of the lump sum will be payable following demobilization.
D. SAFETY FENCE
It is anticipated that no safety fencing will be needed for the proposed work.
E. POLLUTION CONTROL STRUCTURES
SCOPE
The work under this Section E shall consist of installing structural measures or
performing work to control erosion and minimize the production of sediment and
other pollutants to surrounding water resources during construction operations.
Pollution control for any disposal area outside of the project limits is the
responsibility of the Contractor and at no cost to the Owner.
EQUIPMENT AND MATERIALS
The Contractor shall refer to the North Carolina Sediment and Erosion Control
Manual (copies of selected practices in Appendix A) and the following
specifications: Sediment Fence (Temporary Silt Fence); Gravel Construction
Entrance/Exit; Temporary Stream Crossing (Ford); Temporary Sediment Traps;
and Special Stilling Basins. Estimated quantities of material requirements are
given on the plan sheets.
METHODS
The measures and works shall include, but are not limited to, the following:
Sediment Fence (Temporary Silt Fence) - Geotextile silt fences shall be used to
trap sediment from areas of limited runoff. Silt fence shall be properly anchored
to prevent erosion under them. These works are temporary and shall be removed
and the area restored to its original state when they are no longer needed or
permanent measures are installed. Locations for silt fence are shown on the plans.
Refer to silt fence specifications (6.62) in the North Carolina Sediment and
Erosion Control manual (copy provided in Appendix A).
Gravel Construction Entrance/Exit - A construction entrance is necessary for
the project to allow access to the site. An entrance may be built as part of the
development construction. This entrance may remain in place and the contractor
will be permitted to use the existing entrance. The contractor will share
39
New Hanover County Contract #03-0300
maintenance responsibilities with the site developer. If the entrance is not
available then an entrance will need to be constructed. The location of the gravel
construction entrance/exit is shown on the plans. The construction entrance shall
be constructed according to specifications 6.06 of the North Carolina Sediment
and Erosion Control Manual (copy provided in Appendix A).
Temporary Stream Crossing (Ford) - A temporary stream crossing (Ford) is
necessary for the project to allow crossing of the existing stream channel. A
crossing may be built as part of the development construction. This crossing may
remain in place and the contractor will be permitted to use the existing crossing.
The contractor will share maintenance responsibilities with the site developer. If
the crossing is not available then a crossing will need to be constructed. The
location of the temporary stream crossing is shown on the plans. The ford
crossing shall be constructed according to specifications 6.70 of the North
Carolina Sediment and Erosion Control Manual (copy provided in Appendix A).
Temporary Sediment Traps - Temporary sediment traps will be installed at the
end of the each section (phase) of stream channel as work within the section
(phase) is being constructed. These works are temporary and shall be removed
and the area restored to a stable condition when they are no longer needed or
permanent measures are installed. The locations of the temporary sediment traps
are shown on the plans. The temporary sediment traps shall be constructed
according to specifications 6.60 of the North Carolina Sediment and Erosion
Control Manual (copy provided in Appendix A).
Special Stilling Basins - Special stilling basin(s) shall be a water permeable
fabric bag that traps sand, silt, and fines as sediment laden water is pumped into it.
Special stilling basins will be installed at the discharge end of the flexible pipe
used in the set up of the temporary pump around operation. The temporary pump
around operation is used to divert stream flow around each section (phase) of
stream channel as work within the section (phase) is being constructed. Special
stilling basins are temporary and shall be removed and the area restored to a stable
condition when they are no longer needed. The locations of the special stilling
basins are shown on the plans. The temporary pump around operation is detailed
in the project plan sheets. The special stilling basin(s) shall be placed so the
pumped water flows into and through the bag without causing erosion. The neck
or spout of the bag shall be tied off tightly to stop the water from flowing out of
the bag without going through the walls.
The special stilling basin(s) shall be replaced and disposed of when it is 3/4 full of
sediment or when it is impractical for the bag to filter the sediment out at a
reasonable flow rate. Prior approval from the Engineer/Project Manager must be
received before removal and replacement. The Contractor shall be responsible for
providing a sufficient quantity of bags to contain silt from pumped effluent during
construction.
40
New Hanover County Contract #03-0300
The special stilling basin(s) shall be a bag constructed to a minimum size of 10'X
15' made from a non-woven fabric. It shall have a sewn-in 8 in. (maximum) spout
for receiving pump discharge. The bag seams shall be sewn with a double needle
machine using a high strength thread. The seams shall have minimum wide width
strength as follows:
Test Method
ASTM D-4884
Minimum Specifications
60 lb/in
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:
Property Test Method Units Min. Specs.
Weight ASTM D-3776 oz/yd 8.0
Grab tensile ASTM D-4632 lb 200.0
Puncture ASTM D-4833 lb 130.0
Flow rate ASTM D-4491 gal/min/sf 80.0
Permittivity ASTM D-4991 ft/sec 1.5
UV Resistance ASTM D-4355 % 70.0
Diversion Pump and System - A pump shall be used to convey the base stream
flow around the work area during channel excavation, installation of structures,
and stabilization. The pump used must be able to convey approx.1.5 cubic feet
per second (approximately 600 gallons per minute). This conveyance discharge is
an estimate only; the contractor is responsible for determining and obtaining the
actual pump size necessary. The pump includes temporary flexible hose or pipe in
sufficient length to pump the water from the upstream side of the reach to the
downstream end of the reach as shown on the plans. A second pump will be
required to dewater the section of channel isolated by the impervious dikes, as
shown on the plan sheets.
Impervious Dikes An impervious dike is a temporary channel block that prevents
water from entering the section of channel under construction. Impervious dikes
are used in concert with the diversion pump and system for the purpose of
diverting'normal stream flow around the construction site. The impervious dike
shall be constructed in such a manner, and of materials, acceptable to the
Engineer/Project Manager. Acceptable materials shall include, but not be limited
to, sheet piles, sandbags, and/or the placement of an acceptable size stone lined
with polypropylene or other impervious fabric. Earth material shall not be used to
construct an impervious dike when it is in direct contact with the stream.
Filter Fabric, Type 2 Non-woven - is a polypropylene nonwoven,
needlepunched fabric. This engineered geotextile is stabilized to resist
41
New Hanover County Contract #03-0300
degradation due to ultraviolet exposure. It is resistant to commonly encountered
soil chemicals, mildew and insects, and is non-biodegradable.
Separation /Stabilization Geotextiles Guide Specification
Aashto M 288-2000 Class 1 Nonwoven Geotextile
Part I General
1.1 Work Included
This work shall consist of one of the following: furnishing and placing a
geotextile for use as a permeable separator to prevent inter-mixing of dissimilar
materials such as: subgrades and aggregate layer in a road, stone layers in erosion
control structures and stone layers in in-stream structures. The geotextile shall be
designed to allow passage of water while retaining in-situ soil and stone material.
1.2 References
ASTM D4491 - Permitivity
ASTM D4751 - Apparent Opening Size
ASTM D4632 - Grab Tensile Strength
ASTM D4833 - Puncture Resistance
ASTM D4533 - Trapezoidel Tear
ASTM D3786 - Mullen Burst
ASTM D4353 - Sampling of Geotextiles for Testing
ASTM D4355 - Ultraviolet Stability
ASTM D4873 - Guide for Identification, Storage, and Handling of Geosynthetics
ASTM D698 - Standard Test Method for Moisture-Density Relations of Soil
and Soil-Aggregate Mixtures (Standard Proctor)
1.3 Delivery, Storage, and Handling
A. The geotextile rolls shall be furnished with suitable wrapping for protection
against moisture and extended ultraviolet exposure prior to placement.
B. Rolls shall be stored in a manner which protects them from the elements.
C. If stored outdoors, they shall be elevated and protected with a waterproof
cover.
D. At no time shall the geotextile be exposed to ultraviolet light for a period
exceeding fourteen days.
E. The geotextile rolls shall be labeled as per ASTM D 4873, "Guide for
Identification, Storage, and Handling of Geosynthetics".
1.4 Method of Measurement
The geotextile shall be measured by the number of square yards computed from
the payment lines shown on the contract drawings or from payment lines
established in writing by the engineer. This excludes seams and overlaps but shall
include geotextiles used in the crest and toe of slopes. Slope preparation,
excavation and backfilling, bedding, and cover material are separate pay items.
42
New Hanover County Contract #03-0300
1.5 Basis of Payment
A. The accepted quantities of geotextile shall be paid for per square yard in place.
Payment will be made under: Item E2: Filter Fabric, Type 2
Part 2 Products
2.1 Manufacturer and Local Supplier
Amoco Fabrics and Fibers Company, Austell, GA 30168
Ikex Inc., Middlesex, NC 27557 [phone]
2.2 Products
A. Fibers used in the manufacture of separation and stabilization geotextiles shall
consist of a material composed of at least 85 percent by weight polyolefins,
polyesters, or polyamides.
B. The geotextile and the threads used in sewing geotextiles shall be resistant to
chemical attack, rot, and mildew.
C. The geotextile shall have no tears or defects which adversely alter its physical
properties.
D. The geotextile shall be Amoco Style 4552 or approved equal, and shall meet
the physical requirements of Table 1-1. Amoco Style 4552 is a nonwoven
geotextile which meets AASHTO M 288-2000 requirements for Class 1 geotextile
used in separation and stabilization applications.
TABLE 2-1: Filter Fabric, Type 2
Property Test Method Minimum Average
Roll Value (English) Minimum Average
Roll Value (Metric)
Grab Tensile ASTM-D4632 180 lb 0.800 kN
Grab Elongation ASTM-D-4632 50% 50%
Mullen Burst ASTM-D-3786 330 psi 2274 kPa
Puncture ASTM-D-4833 105 lb 0.465 kN
Trapezoidal Tear ASTM-D-4533 75 lb 0.330 kN
UV Resistance ASTM-D-4355 70 % at 500 hrs 70 % at 500 hrs
AOS(1) ASTM-D-4751 70 sieve 0.212 mm
Permittivity ASTM-D-4491 1.5 sec-1 1.5 sec-1
Flow Rate ASTM-D-4491 110 gal/min/ft2 4470 Umin/m2
Part 3 Execution
3.1 Site Preparation
The installation area shall be prepared by clearing all debris or obstructions which
may damage the geotextile. Trees and large bushes should be cut at ground level.
In most cases, all native vegetation, roots and topsoil must be removed from the
subgrade prior to geotextile placement.
3.2 Geotextile Placement
A. The geotextile shall be unrolled as smoothly as possible on the prepared
43
New Hanover County Contract #03-0300
subgrade in the direction of water flow.
B. Geotextile rolls shall be overlapped in the direction of water flow.
C. If required, the geotextile may be held in place prior to subbase placement with
pins, sand bags, or piles of fill or rock.
D. On curves, the geotextile may be folded or cut to conform to the curve
E. The fold or overlap shall be in the direction of water flow and shall be held in
place as prescribed above.
F. The geotextile shall not be dragged across the subgrade.
G. Damaged geotextiles shall be repaired immediately.
H. Damaged geotextile shall be repaired at no cost to the owner.
3.3 Aggregate Placement
A. The aggregate base or subbase (aggregate) shall be placed by end dumping
adjacent to the geotextile or over previously placed aggregate. End dumping or
tail gate dumping of aggregate on the geotextile will not be permitted.
B. The aggregate shall be spread from the backdumped pile using a trackhoe.
C. A sufficient thickness of aggregate should be in place prior to dumping to
minimize the potential of subgrade pumping and localized subgrade failure.
D. The aggregate shall be placed on the geotextile in lifts not less than 6-in. thick.
For low volume roads, the minimum lift may be reduced to a 4-in. thickness at the
discretion of the engineer.
E. Traffic shall not be permitted directly on the geotextile. Sudden stops or turns
by equipment operating on aggregate placed over the geotextile shall be avoided.
A smooth drum roller shall be used to achieve specified aggregate density.
F. Any ruts occurring during construction shall be filled with additional aggregate
and compacted to the specified density. Vibratory compaction shall not be used
on the initial lift over the geotextile.
Other - Additional work as required by the Federal, State, or Local Government.
All pollution control measures and works shall be adequately maintained in a
functional condition as long as needed during the construction operation. All
temporary measures shall be removed and the site restored to as nearly original
conditions as practical.
BASIS OF PAYMENT
Payment for all pollution control measures will be made as follows. Such
payment will be full compensation for the work as described in the above
paragraphs and attached specifications.
Sediment fence will be paid on a per linear foot basis and shall include all
material and labor costs incurred in its proper installation, maintenance and
removal under Section El: TEMP SILT FENCE.
44
New Hanover County Contract #03-0300
The gravel construction entrance/exit, temporary stream crossing (Ford) and
temporary sediment traps, will be paid for under Section E2: FILTER FABRIC
and Section I: STONE. Payment shall include all material, equipment and labor
costs incurred in the construction, maintenance and removal of these pollution
control devices.
The special stilling basin(s) to be paid for will be the actual number of bags used
during construction as specified and accepted by the Engineer/Project Manager.
The quantity of special stilling basin(s) as measured will be paid for at the
contract unit price each for E3: SPECIAL STILLING BASIN. Such price and
payment will be full compensation for all work covered by this provision,
including but not limited to, furnishing all materials, placing and maintaining the
special stilling basin(s), and removal and disposal of silt accumulations and bag.
The filter fabric and stone associated with the use of the special stilling basins will
be paid for under Section E2: FILTER FABRIC and Section 1: STONE. All
other labor, and materials shall be considered incidental to the price of the special
stilling basin and no separate payment shall be made for such.
The diversion pump and system and impervious dikes will be paid as a lump
sum price under Section E4: DIVERSION PUMP AND SYSTEM. This pay item
covers equipment, materials, and labor associated with furnishing, installing,
maintain, and moving the pump and hose used to convey base stream flow during
construction and with the construction and de-construction of the imperious dikes.
The cost for the stone required as a part of the pump around operations will be
paid under Section I: STONE. All other labor, equipment and materials necessary
to install, maintain and move the system shall be considered incidental to the price
of the diversion pump and system and no separate or additional payment shall be
made.
The above prices and payments will be considered full compensation for all work
covered by this section.
F. TEMPORARY SEEDING PERMANENT SEEDING AND MULCHING
SCOPE
The work under this section shall consist of temporary seeding, permanent
seeding, and mulching measures to control erosion and minimize the production
of sediment and other pollutants to water and air during construction operations.
Seeding will be used on all areas susceptible to erosion during and immediately
following construction, including, but not limited to excavated banks, access
areas, staging areas, and areas where excess soil will be spread. Seeding will take
place immediately after construction activities are completed in any disturbed
areas. Temporary seeding and permanent seeding shall take place simultaneously
45
New Hanover County Contract #03-0300
and shall be immediately followed by mulching. The work shall consist of
preparing the area, furnishing and placing seed and mulch, and anchoring mulch
in the designated areas as specified.
EQUIPMENT AND MATERIALS
Temporary Seeding
For temporary seeding, apply the following vegetation at the listed rates and
times. A combination of the two seed types shall be used during the boundary
months of March, April, August and September to ensure survival.
Temporary Seeding (September to March):
Rye grain 3 lbs per 1,000 sq ft or 130 1bs per acre
Temporary Seeding (April to August):
Browntop Millet 1 lb per 1,000 sq ft or 45 lbs per acre
Permanent Seeding
For permanent seeding, apply the following vegetation at a rate of 15 pounds per
acre.
Riparian Seed Mix (Bottom of Channel to Top of Bank)
33% Virginia wild rye Elymus virginicus
33% Switchgrass Panicum virgatum
34% Fox Sedge Carex vulpinoidea
Riparian Seed Mix (Top of Bank and Upland)
30% Big Bluestem Andropogon gerardii
30% Little Bluestem Schizachyrium scoparium
30% Indian Grass Sorghastrum nutans
10% Switch Grass Panicum virgatum
Mulching
Mulching shall be used to provide temporary protection of soil surfaces from
erosion. Mulching should be performed within 48 hours of seeding. Grain straw
mulch should be applied on seeded areas at a rate of 3 bales per 1,000 sq ft (130
bales per acre). Apply mulch uniformly.
METHODS
It is anticipated that the soil will be sufficiently loosened after construction to
allow for immediate planting of seed. A mechanical spreader shall be used to
broadcast seed. Seed shall not be broadcast by hand.
46
New Hanover County Contract #03-0300
BASIS FOR PAYMENT
The quantity of temporary seeding will be paid for at the contract unit price per
pound of seed applied to the ground surface. The price includes all incidental
costs associated with obtaining and installing the seed under SECTION Fl:
TEMPORARY SEEDING. The quantity of permanent seeding and mulching will
be paid at the contract unit price per acre of disturbed area seeded and mulched.
The price includes all incidental costs associated with obtaining and installing the
seed under SECTION F2: SEEDING AND MULCHING.
G. COCONUT (COIR) FIBER MATTING
SCOPE
Furnish materials, install and maintain Coconut (Coir) Fiber Matting in locations
shown on the plans or in locations as directed by the Engineer/Project Manager.
Locations will primarily be on new stream banks. Other problem areas may also
require the placement of coconut fiber matting. Work includes providing all
materials, excavating and backfilling, and placing and securing Coconut (Coir)
Fiber Matting.
EQUIPMENT AND MATERIALS
The coconut (coir) fiber erosion control matting shall be a machine-produced
100% biodegradable semi-permanent erosion control matting with a 100%
coconut fiber matrix with a functional longevity of approximately 4 to 6 years.
The matting shall be of consistent thickness with the coconut fiber evenly
distributed over the entire area of the matting. Wood Stakes are the only
acceptable means of securing the matting to the ground surface. Staples are not
acceptable and shall not be used. Wood Stakes shall be 12" in length and 2"
square, notched.
The Coconut (Coir) fiber matting shall meet the following specifications:
Property Test Method BioD - Mat 70
Weight oz./s d ASTM D 3776 23.0
Weight /s .m 780
Wet tensile strength ASTM D 4595
MD Ibs/ft 1488
CD Ibs/ft 1032
MD k N/m 2

CD k N/m 15.0

5.0
% Open area Calculated 48
Thickness inch ASTM D 1777 0.35
Recommended sloe > 1.1
Recommended flow (fps) 12 -
Recommended shear stress Ibs/s .ft 4.5
"C Factor 0.002
47
New Hanover County Contract #03-0300
METHODS
Place the coconut (coir) fiber matting immediately upon final grading. Provide a
smooth soil surface free from stones, clods, or debris that will prevent the contact
of the matting with the soil. Apply seed prior to installing matting. Begin at the
bottom of the slope by anchoring the matting in a 6-inch (15 cm) deep by 6-inch
(15 cm) wide trench. Backfill and compact the trench after stapling (staking) with
5 evenly spaced stakes. Walking backward down the stream, allow the matting to
unroll slowly; ideally the matting roll will rest against your shin as you walk.
Stake the matting according to recommended staking pattern for specific product
and slope. (See staking pattern guide that comes with the product.) Place matting
loosely and in full contact with the soil. The edges of the parallel matting must be
staked with approximately 2 inches (5 cm) of overlap such that the edge of the
downstream matting is under the one just upstream. When matting must be
spliced down the slope, place matting end over end (shingle style) with
approximately 6 inches (15 cm) overlap. Stake through overlapped areas using 5
stakes. Place stakes across the matting at ends, junctions and trenches
approximately 1.3 ft (40 cm) apart. Place stakes along the outer edges, down the
center of each strip of matting and along all lapped edges approximately 2 feet (61
cm) apart. The Engineer/Project Manager may require adjustments in the
trenching or staking requirements to fit individual site conditions. Cut excess
matting and anchor at end of slope.
The contractor shall be responsible for the repair and maintenance of the coir fiber
matting installed throughout the construction period. Minor and major repair
work may be necessary at times during the construction period, particularly if the
site experiences significant storm events. Repair and maintenance will be at the
direction of the Engineer/Project Manager and this work shall be incidental to this
pay item and at the expense of the contractor.
BASIS OF PAYMENT
The quantity of coconut (coir) fiber matting measured will be paid for according
to the actual number of square yards installed along the surface of the ground and
accepted by the Engineer/Project Manager.
The quantity of coconut (coir) fiber matting, determined as provided above, will
be paid for at the contract unit price per square yard installed for ITEM G:
COCONUT (COIR) FIBER MATTING. Payment shall include all material,
equipment and labor costs incurred in obtaining, installing, maintaining and
repairing the coir fiber matting, including stakes.
48
New Hanover County Contract #03-0300
H. EXCAVATION FILL GRADING AND SITE PREPARATION
SCOPE
The Contractor shall excavate and grade the stream channel and created wetland
areas according to the design plans and as directed by the Engineer/Project
Manager. Typical cross sections and approximate contours are provided in the
drawings. The excavated material will be placed in stockpiles at locations
identified on the project plan sheets. It may be necessary to re-use excavated
material from the stockpile areas to balance cut and fill operations during project
construction. Following the completion of each phase of the project stockpiled
material shall be hauled to locations outside of the project limits as identified on
the plans. This item also includes site clearing, as necessary to perform the work.
The installation of instream structures or erosion control measures will not be bid
under this section.
METHODS
General Grading
The Contractor shall ensure that final grades on all stream channel are within 0.2
foot of the design contours, elevations, and slopes unless otherwise directed by
the Engineer/Project Manager. The contractor shall be instructed as to the target
elevation and slope and it shall be the responsibility of the contractor to maintain
the elevation and slope during grading. The contractor shall have on site, at all
times during grading operations, a laser level and a person skilled in its use to
assist the track hoe operator during channel excavation.
Site Preparation
Clearing of the stream channel banks and some areas within the enhanced
wetland, will be necessary. Any cleared trees, snag, roots, stumps, etc. shall be
chipped and distributed on site or hauled off and disposed of.
BASIS OF PAYMENT
The total volume of material to be excavated has been estimated in cubic yards.
Payment for all excavation, grading, and site preparation work as described above
shall be paid for on a lump sum basis regardless of discrepancies in estimated and
actual cubic yards of material excavated. Payment shall include all material,
equipment and labor costs incurred in site preparation, clearing, excavating,
stockpiling, filling, grading, hauling excavated material and disposing of cleared
debris. Excavation, fill, and grading shall be at the contract lump sum price as
ITEM HI: EXCAVATION, FILL, AND GRADING. Site preparation, which
includes all labor material and equipment for the handling, hauling and disposal
of cleared material, shall be at the contract lump sum price as ITEM 1-12: SITE
PREPARATION.
49
New Hanover County Contract #03-0300
I. STONE
SCOPE
The work covered by this section consists of furnishing, stockpiling, placing and
maintaining approved stone to be utilized to construct cross-vane structures, weir
structures, all pollution control structures, and for use in other locations as
directed by the Engineer/Project Manager.
EQUIPMENT AND MATERIALS
Stone for "# 57 Stone"; "Class A Stone"; "Plain Rip-rap, Class B Stone"; "Plain
Rip-rap, Class 1 Stone"; and "Stone Boulders" shall consist of blasted granite
quarry stone stockpiled onsite and approved by the Engineer/Project Manager.
The stone shall be sound, tough, dense, resistant to the action of air and water, and
suitable in all other respects for the purpose intended.
All stone shall meet the approval of the Engineer/ Project Manager. While no
specific gradation is required, the various sizes of the stone shall be equally
distributed within the required size range. The size of an individual stone particle
will be determined by measuring its long dimension.
REQUIRED STONE SIZES (INCHES)
CLASS Minimum Average Maximum
# 57 Stone 0.25 0.5 1.5
Class B Stone, Plain Rip Rap 5 8 12
_
Class A Stone, Plain Rip Rap 2 4 6
Class 1 Stone, Plain Rip Rap 5 10 17
Stone Boulders 36 48 60
Boulders of approximate dimension 48" x 36" x 24"" (-I cubic yards, 5 Tons
max.) shall be individually picked by the Contractor from the quarry for use in the
cross-vane structures. Boulders shall be relatively flat on either side in the same
dimension, preferably the long dimension and must have square ends.
Unless otherwise approved by the Engineer/Project Manager, excavation to
prepare subgrade for the installation of rock cross vanes and weir structures shall
be consecutive and continuous. Once the excavation of a structure has begun, the
structure will be completed by the end of the workday. All equipment shall be
removed from the stream at the end of each workday
Filter Fabric, Type 2, non-woven
Filter Fabric, Type 2, non-woven shall be used in the construction of cross-vane
structures, weir structures, and pollution control structures. Filter fabric is used for
sealing structures and filtering and trapping sediment
50
New Hanover County Contract #03-0300
METHODS
The Contractor shall place stone, in locations shown on the plans or as directed by
the Engineer/Project Manager, to the thickness, widths, and lengths as shown on
the plans and described in the specifications, or directed by the Engineer/Project
Manager. All stone shall be placed to form pollution control structures, rock
cross-vanes, or weir structures in accordance with the plans, neatly and uniformly,
and shall meet the approval of the Engineer/Project Manager.
The quantity of rock cross-vanes to be constructed will be affected by actual
conditions that occur during the construction of the project. The quantity of
structures may be increased or decreased at the direction of the Engineer/Project
Manager. The actual type and construction of the structures may also be altered at
the discretion of the Engineer/Project Manager to better conform to site
conditions. Such variations in quantity or form will not be considered as
alterations in the details of construction or a change in the character of the work.
BASIS OF PAYMENT
The quantity of all boulders and stone to be paid for will be the actual number of
tons of stone that has been delivered to and stockpiled on the project as directed
by the Engineer/Project Manager. The stone will be measured by being weighed
in trucks on certified platform scales or other certified weighing devices. Payment
will include the purchasing, transportation to the project site, and installation of
the stone. Stone purchased in excess of what is required for the project shall not
be paid for and shall be removed from the project site at the expense of the
contractor. Payment shall include all material, equipment and labor costs incurred
in obtaining, hauling, handling, installing, placing, and disposing of excess stone.
Stone shall be paid for at the contract unit price per ton as ITEM I: STONE.
Filter fabric, used to seal the rock cross-vanes and weir structures shall be paid for
on a per square yard installed basis as ITEM E2: FILTER FABRIC, TYPE 2
NON-WOVEN. Payment shall include all material, equipment and labor costs
incurred in obtaining, handling, and installing filter fabric, type 2, non-woven.
J. PLANTINGS
SCOPE
The work under this section shall consist of the supply, transport, and planting of
plants for the purpose of streambank stabilization, wetland creation and
enhancement of stream and wetland habitat.
51
New Hanover County Contract #03-0300
EQUIPMENT AND MATERIALS
The Contractor shall provide plants and labor, materials and equipment for the
installation of the plants. Plantings shall be installed according to the following
species distribution:
Inner Berm to Top of Bank
Common Name Scientific Name
15% Swamp Tupelo Nyssa biflora
15% Overcup Oak Quercus lyrata
15% River Birch Betula nigra
15% Sweetbay Magnolia virginiana
14% Swamp Red Bay Persea palustris
13% Wax Myrtle Myrica cerifera
13% Ironwood Carpinus caroliniana
Top of Bank
Common Name Scientific Name
17% Swamp Chestnut Oak Quercus michauxii
17% Laurel Oak Quercus laurifolia
17% Water Oak Quercus nigra
17% Sweetbay Magnolia virginiana
17% Swamp Red Bay Persea palustris
15% Wax Myrtle Myrica cerifera
Downstream End of Futch Creek
Common Name Scientific Name
20% Swamp Tupelo Nyssa biflora
20% Bald Cypress Taxodium distichum
20% Carolina Ash Fraxinus caroliniana
20% Parsley-leaf Hawthorne Crataegus marshallii
20% Buttonbush Cephalanthus occidentalis
Created /Enhanced Wetland Areas
Common Name Scientific Name
15% Soft Rush Juncus e&sus
15% Wool Grass Scirpus cyperinus
15% Green Arrow-arum Peltandra virginica
14% Broadleaf Arrowhead Sagitaria latifolia
13% Pickerelweed Pontederia cordata
13% Lizard's Tail Saururus cernuus
15% Tussock Sedge Carex stricta
52
New Hanover County Contract #03-0300
METHODS
The contractor shall obtain and install potted plant material. If potted plants are
not available, bare root plants will be considered and the use of bare roots with be
at the discretion of the Project Engineer/Manager. Plants shall carefully be
planted. Care shall be given not to rip limbs or bark from the shrub and tree
plants nor damage the herbaceous wetland vegetation. Plants should be planted as
soon as practicable after delivery. Otherwise, plants will be carefully stockpiled
and cared for (watering, shading, etc.) during storage. The solidity of the plants
shall be carefully preserved.
Installation of shrub and tree plants shall be located in designated areas along the
top of the stream bank or in floodplain restoration areas as indicated on the project
plans or as directed by the Engineer/Project Manager. Herbaceous wetland
vegetation with be planted in designated areas in the created wetland area, as well
as in the wetland enhancement area. Soil in the area of vegetation planting shall
be loosened to a depth of at least 1 foot. This is only necessary on compacted
soil. The planting trench or hole shall be deep and wide enough to permit the
roots to spread out and down without J-rooting. The plant stem shall remain
upright. Soil shall be replaced around the planted vegetation and tamped around
the shrub or tree firmly to eliminate air pockets.
The contractor shall be responsible for the maintenance and replacement of
damaged plantings installed throughout the construction period. Minor and major
maintenance and replacement work may be necessary at times during the
construction period, particularly if the site experiences significant storm events.
Maintenance and replacement will be at the direction of the Engineer/Project
Manager and this work shall be incidental to this pay item and at the expense
of the contractor
BASIS OF PAYMENT
The quantity of plantings will be paid for at the contract unit bid price per plant
installed and accepted by the Engineer/Project Manager. Unit price payments will
be considered full compensation for all work covered by this Section, including,
but not limited to, furnishing, stockpiling, installing, and maintaining plantings, as
well as replacing damaged or dead plantings. Tree and shrub plants shall be paid
for at the contract unit price per each as ITEM J 1: TREE AND SHRUB
PLANTINGS. Herbaceous wetland vegetation shall be paid for at the contract
unit price per each as ITEM J2: WETLAND VEGETATION PLANTINGS
53
New Hanover County Contract #03-0300
K. LIVE STAKING
SCOPE
The work under this section shall consist of the installation of live stakes on
stream banks to be protected from erosion. The Contractor will be responsible for
obtaining and delivering the live stakes to the project site, and installation of the
live stakes. The contractor may also purchase live stakes from a plant nursery.
Staking must take place during the dormant season (November - March).
EQUIPMENT AND MATERIALS
Live stakes may be of the following species:
Black Willow Salix nigra
Silky Willow Salix sericea
Silky Dogwood Corpus amomum
Elderberry Sambucus canadensis
If silky willow and black willow are used, they should make up no more than 30%
of the total number of stakes planted. The remaining 70% of stakes should be
silky dogwood and elderberry.
METHODS
Live stake materials should be dormant and gathered locally or purchased from a
reputable commercial supplier. Stakes should be at least 1/2 inches and no more
than 2 inches in diameter and between 2 and 3 feet in length, and living based on
the presence of young buds and green bark. Stakes shall be angled on the bottom
and cut flush on the top with buds oriented upwards. All side branches shall be
cleanly trimmed so the cutting is one single stem. Stakes should be kept cool and
moist to improve survival and to maintain dormancy.
Planting shall take place between November 15 and March 15. Stakes should be
installed 2 to 3 feet apart using triangular spacing or at a density of 300 stakes per
1,000 ft2 along the stream banks as indicated in the plans. Site variations may
require slightly different spacing. Stakes shall be driven into the ground using a
rubber hammer or by creating a hole and slipping the stake into it. The stakes
should be tamped in at a right angle to the slope with 4/5 of the stake installed
below the ground surface. At least two buds (lateral and/or terminal) shall remain
above the ground surface. The soils shall be firmly packed around the hole after
installations. Split stakes shall not be installed. Stakes that split during
installations shall be replaced.
BASIS OF PAYMENT
The quantity of live stakes planted will be paid for according to the actual number
54
New Hanover County Contract #03-0300
of live, viable stakes planted in a manner acceptable to the Engineer/ Project
Manager. Live stakes shall be paid for at the contract unit price per each as ITEM
K: LIVE STAKES and includes all labor, material and equipment necessary for
the collection, delivery, and proper installation of the stakes in the stream bank.
L. INTERPRETIVE SIGN INSTALLATION
SCOPE
The work under this section shall consist of the installation of an interpretive sign
at a location to be determined in the filed by the Project Engineer/Manager. The
sign will be provided to the contractor and the contractor will be responsible for
the proper handling and installation of the sign. The installation of the sign will
likely require the excavation of a post hole and the mixing and placement of
concrete mix of a type and quantity appropriate for this type of this task.
EQUIPMENT AND MATERIALS
The contractor will provide labor, equipment and materials necessary for the
correct and appropriate method of installation as determined by the manufacturer
of the sign and as directed by the Project Engineer/Manager. The sign will be
provided, but all other tools, equipment and materials are considered incidental to
the installation.
METHODS
The sign shall be installed according to the manufacturer's specifications. It is
anticipated that installation will require the excavation of a small diameter hole of
sufficient depth to adequately support the sign. Installation will likely specify the
placement of concrete mix (type to be determined) around the sign post. The
contractor shall follow all of the sign manufacturer's recommendations, as well as
those of the concrete manufacturer as listed on the product label.
BASIS OF PAYMENT
The installation of the interpretive sign will be paid for at the contract lump sum
price as ITEM L: INTERPRETIVE SIGN INSTALLATION and includes all
labor, material and equipment necessary for the installation of the sign.
55
New Hanover County Contract #03-0300
APPENDIX A: SELECTED EROSION CONTROL PRACTICES COPIED FROM
THE NC SEDIMENT AND EROSION CONTROL MANUAL
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
56
BUCK 8000 Regency Parkway
LETTER OF TRANSMITTAL
Suite 200
Cary, North Carolina 27511
Phone: [phone]
ENGINEERING Fax: [phone] ???yyy
www.buckengineering.com
v ? h
TO: Division of Water Quality RE: Permit Application
401 Wetlands Unit 1650 Mail Service Center Futch Creek
ATTENTION:
DATE:
Raleigh, NC 27699-1650
Telephone: [phone]
September 30, 2003 JOB NO. Buck #138
We are sending via:
0 Overnight 0 Regular Mail ? Pick-up 0 Hand Delivered
The following items:
0 Correspondence 0 Plans F1 Specifications XD Other as listed below:
COPIES DATE NO. DESCRIPTION
3 8/18/03 Permit Application for Tributary to Futch Creek Stream and Wetland Enhancement
Proiect.

... ! .a,

0C I 20o

THESE ARE TRANSMITTED as checked below:
BX For Approval e As Requested B Approved As Submitted e Returned For Corrections
For Your Use For Review And Comment Approved As Noted Forward To Subcontractor
REMARKS:
COPY TO: D. Smith, BUCKENGINEERING SIGNED:

Processing
Office Use Only: Form Version May 2002
?r
USACE Action ID No. DWQ No. 1'
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
1.
II.
1. Check all of the approval(s) requested for this project:
® Section 404 Permit ? Riparian or Watershed Buffer Rules
? Section 10 Permit ? Isolated Wetland Permit from DWQ
® 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested:
FILE COPY
Nationwide 13
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 (verify availability with NCWRP prior to submittal of PCN), complete
section VIII and check here: ?
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ?
Applicant Information
1. Owner/Applicant Information
Name: New Hanover County
Mailing Address: New Hanover County Planning-]

0(J T .. 4 200"r
230 Marketplace Drive, Suite 150
Wilmington NC 28403
Telephone Number: 910-798-7444 Fax Number: 910-798-7053
E-mail Address: [e-mail]
2. Agent/Consultant 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: Douglas Smith
Company Affiliation: Buck Engineering
Mailing Address: 8000 Regency Parkway Suite 200
Cary NC 27511
Telephone Number: 919-463-5488 Fax Number: 919-463-5490
E-mail Address: dsmith@bucken in?g.com
Page I of 8
III. Project Information
Attach a vicinity map clearly showing the location of' the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than I 1 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.
L Name of project: Tributary to Futch Creek Stream and Wetland Enhancement Work
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): Not Yet Recorded
4. Location
County: New Hanover Nearest Town: Wilmington
Subdivision name (include phase/lot number): Sagewood at Plantation Landing
Directions to site (include road numbers, landmarks, etc.):
Highway 17 North to Futch Creek Road. Right on Futch Creek Road, Development of left.
5. Site coordinates, if available (UTM or Lat/Long):
(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. Property size (acres): approx. 45 acres
7. Nearest body of water (stream/river/sound/ocean/lake): Futch Creek
River Basin: Cape Fear
(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/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: Site is currently being cleared for development.
Page 2 of 8
10. Describe the overall project in detail, including the type of equipment to be used:
Excavation and stabilization (with matting and vegetation) of one eroding stream bank.
Installation of natural channel design structures specifically rock cross-vanes to prevent
further downcutting of the streambed. Additional wetland species plantings. Vast majority
of the work is completed with a track hoe and manual labor.
11. Explain the purpose of the proposed work: channel and bank stabilization and reduction in
soil loss through erosion control. Overall improvement of water quality. Enhancement of
the natural wetland and stream ecosystem.
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.
None associated with this work.
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 associated with this work.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein, and must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a
delineation map, whether or not impacts are proposed to these systems. Wetland and stream
evaluation and delineation forms should be included as appropriate. Photographs may be
included at the applicant's discretion. If this proposed impact is strictly for wetland or stream
mitigation, list and describe the impact in Section VIII below. If additional space is needed for
listing or description, please attach a separate sheet.
Page 3 of 8
L Provide a written description of the proposed impacts: Temporary diversion of the
stream flow, via pump and hose during construction. Clearing and excavation of one
streambank to be stabilized and replanted.
2. Individually list wetland impacts below:
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***

1 Enhancement of
hydrology and
planting of
vegetation

2

No

]n-line
Emergent/bottomland
hardwood

* 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 http://www.1eina.gov.
*** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only).
List the total acreage (estimated) of all existing wetlands on the property
Total area of wetland impact proposed: 2
3. Individually list all intermittent and perennial stream impacts below:
2
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 stabilization 1645 Tributary to Futch
Creek 2 feet Perennial
2 stabilization 30 Futch Creek 3 feet 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.usgs.gov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com,
www.maPxpiest.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: 1,675
Page 4 of 8
4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.) below:
Open Water Impact
Site Number
(indicate on ma)
Type of Imp` tct* Area of
Impact
(acres)
(ifName ofapplicabblele) Wat) Type of Waterbody
(lake, pond, estuary' sound,
bay, ocean, etc.)
None

* List each impact separately and identity temporary impacts. Impacts include, but are not limited to: tut, excavation, dredging,
flooding, drainage, bulkheads, etc.
5. 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.
Imnacts are central to the nurnose of the nroiect, which is to provide a more stable channel
and a more appropriate cross-sectional form. Impacts will be very temporary and only that
portion which can be stabilized by the end of the work day will be disturbed.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
Page 5 of 8
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetlands/strmgide.htmi.
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.
Not applicable
2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at
[phone] to determine availability and to request written approval of mitigation prior
to submittal of a PCN. For additional information regarding the application process for the
NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/w1:p/index.htm. If use of
the NCWRP is proposed, please check the appropriate box on page three and provide the
following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Page 6 48
IX. Environmental Documentation (required by DWQ)
Does the project involve an expenditure of public (federal/state) funds or the use of public
(federal/state) 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 [phone] to review current thresholds for environmental documentation.
Yes ? No
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 (required by DWQ)
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 213 .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 ® If you answered "yes", provide the following information:
Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer
mitigation is required calculate the required amount of mitigation by applying the buffer
multipliers.
Zone* Impact
(square feet) Multiplier Required
Mitigation
1 3
2 1.5
Total
* Zone I extends out 30 feet perpendicular from near bank of channel; "Lone 2 extends an
additional 20 feet from the edge of Zone 1.
Page 7 of'8
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 2B .0242 or.0260.
Riparian buffer restoration enhancement and preservation are an inherent goal of this project.
XI. Stormwater (required by DWQ)
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.
Not applicable
XII. Sewage Disposal (required by DWQ)
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.
Not applicable
XIIL Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application?
Yes ? No
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).
It is imperative the construction of this project coincide with the overall site development, which
is currently underway.
kym! L' & _1' ?' O to-k-&?
Applicant/Age t s Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 8 of 8
TRIBUTARY TO FLITCH CREEK
STREAM AND WETLAND ENHANCEMENT
PROJECT
New Hanover County, North Carolina
CONSTRUCTION BID PACKAGE
Prepared for:
New Hanover County
Prepared by:
Buck Engineering PC
8000 Regency Parkway, Suite 200
Cary, NC 27511
[phone]
September, 2003
New Hanover County Contract #03-0300
TABLE OF CONTENTS
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
SCOPE OF WORK ......................................................................................................................... 3
NOTICE TO BIDDERS .................................................................................................................. 3
EXHIBIT A: CONTRACT BID FORM ......................................................................................... 5
EXHIBIT B: CONTRACT TERMS AND CONDITIONS AND INSURANCE
REQUIREMENTS .................................................................................................. 7
EXHIBIT C: DIRECTIONS TO PROJECT SITE ........................................................................34
EXHIBIT D: GENERAL CONSTRUCTION SEQUENCE ........................................................34
EXHIBIT E: PROJECT SPECIFICATIONS ................................................................................37
A. GENERAL SPECIFICATIONS ...........................................................................................37
B. CONSTRUCTION SURVEY ..............................................................................................37
C. MOBILIZATION AND DEMOBILIZATION .................................................................... 37
D. SAFETY FENCE ................................................................................................................. 39
E. POLLUTION CONTROL STRUCTURES ..........................................................................39
F. TEMPORARY SEEDING, PERMANENT SEEDING AND Mulching ............................. 45
G.COCONUT (COIR) FIBER MATTING ..............................................................................47
H.EXCAVATION, FILL, GRADING, AND SITE PREPARATION ....................................49
1. STONE ...............................................................................................................................50
J. PLANTINGS ......................................................................................................................... 51
K..LIVE STAKING ................................................................................................................. 54
L. INTERPRETIVE SIGN INSTALLATION ..........................................................................55
APPENDIX A: SELECTED EROSION CONTROL PRACTICES COPIED FROM THE NC
SEDIMENT AND EROSION CONTROL MANUAL ........................................ 56
2
New Hanover County Contract #03-0300
NOTICE TO BIDDERS
SCOPE OF WORK
The scope of work is for the construction phase of the enhancement of streams and
wetlands at the Tributary to Futch Creek. The Owner is New Hanover County. The
Engineer/Project Manager is Buck Engineering PC.
2. As part of the scope of work, the Contractor will excavate one bank of the existing
channel of Futch Creek, install in-stream structures, reforest the banks and enhance an
existing wetland area by planting and minor earthwork. Work shall be in accordance with
the construction plans, specifications, and under the observation of the Engineer/Project
Manager. The Contractor will install erosion control materials such as silt fence,
broadcast seed, fiber matting, and bare root, container, and live stake plantings. The
Contractor will build in-stream structures at locations within the new stream channel as
shown on the construction plans and as indicated by the Engineer/Project Manager. All
work will follow the construction plans and project specifications and will be observed
by the Engineer/Project Manager. The Engineer/Project Manager will accept or reject all
or portions of the work. The attention of the Contractor is directed to Sheet 2 of the
construction plans which specifies the sequence of construction that is to be followed by
the Contractor in providing the scope of work.
3. Time is of the essence regarding completion of the construction. Construction is
scheduled to begin (to be determined), 2003, subject to final approvals by all applicable
regulatory agencies, and construction activities must be completed by Contractor no later
than (to be determined), 2003. Preference will be given to Contractors that demonstrate
the ability to finish the project in a timely manner.
NOTICE TO BIDDERS
1. Two copies of the Contractor's proposal for this scope of work should be sent to:
Doug Smith
Buck Engineering PC
8000 Regency Parkway, Suite 200
Cary, NC 27511
Ph: 919-463-5488 Fax: [phone]
2. Bids will be received up to 5:00 PM, on (to be determined), 2003. The Owner
anticipates that a successful bid will be chosen by (to be determined), 2003. Complete
plans, specifications and contract documents are enclosed with this bid package.
3. Prospective bidders must attend a pre-bid conference and Site visit at 10:00 AM on (to
be determined), 2003 (map and directions are attached hereto as Exhibit Q. The pre-bid
meeting is required and Contractors may not bid unless they attend.
3
New Hanover County Contract #03-0300
4. Contractors are hereby notified that they must have proper licenses under the State laws
governing their respective trades.
5. In undertaking the scope of work, the Contractor will strictly adhere to all permit and
regulatory agency requirements applicable to the scope of work and the Contractor will
be liable to the Owner for all costs incurred by the Owner resulting from the Contractor's
failure to adhere to such requirements.
6. No bid may be withdrawn after the opening of bids for a period of 30 days. The Owner
reserves the right to reject any or all bids.
7. Proposals must include the form attached hereto as Exhibit A, with all blank spaces for
bids properly filled in and all signatures properly executed.
8. The Owner's standard terms and conditions of purchase for construction services, as
attached hereto as Exhibit B, will apply.
9. As a condition of final payment, the Contractor must submit a final release of liens.
10. As part of its proposal, the Contractor must submit a summary of qualifications,
including a list of references for previous contracts of a similar nature.
11. As part of its proposal, the Contractor must submit a copy of its most recent financial
statement and certification of its insurance coverage.
12. The Contractor will submit monthly invoices to the Owner on a percent complete basis.
Percent complete assessments will be subject to the review and approval of the
Engineer/Project Manager. Approved invoices will be paid by the Owner within 30
calendar days from receipt.
4
New Hanover County Contract #03-0300
EXHIBIT A: CONTRACT BID FORM
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
Page 1 of 2
Item Description Quantity Unit Unit
Price Amount Bid
C Mobilization/Demobilization 1 LS
El Temp, Silt Fence 400 LF
E2 Filter Fabric, Type 2 Non-Woven 750 SY
E3 S ecial Stilling Basin 8 EA
E4 Diversion Pump and System 1 LS
FI Temp Seeding (Rye Grain) 280 LBS
F2 Seeding and Mulching 2.15 ACRES
G Coconut (Coir) Fiber Matting 10,500 SY
H1 Excavation, Fill, Grading 1 LS
H2 Site Preparation 1 LS
11 Stone Boulders (4' x 3' x 2') 440 TONS
12 Class 1 Stone, Plain Rip-rap 80 TONS
13 Class A Stone, Plain Rip-rap 45.00 TONS
14 Class B Stone, Plain Rip-rap 12 TONS
15 #57 Stone 100 TONS
Jl Tree and Shrub Plantings 1450 EACH
J2 Wetland Vegetation Plantings 525 EACH
K Live Staking 1200 EACH
L Interpretive Sign Installation 1 LS
TOTAL AMOUNT OF BID (ITEMS C THRU L) :
5
New Hanover County Contract #03-0300
EXHIBIT A: CONTRACT BID FORM
FLITCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
Page 2 of 2
Number and composition
of crews
Subcontractors
Start date
Estimated completion date
Measures to insure
timely completion
Respectively submitted this day of 2003.
(Name of firm or corporation making bid)
(Federal ID Number)
(License Number)
(Classification)
(Limitation)
Witness: Signature:
Title:
(Owner, Partner, Pres. or VP)
Address:
6
New Hanover County Contract #03-0300
EXHIBIT B: CONTRACT TERMS AND CONDITIONS AND INSURANCE
REQUIREMENTS
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
New Hanover County Contract #03-0300
EXHIBIT D: GENERAL CONSTRUCTION SEQUENCE
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
The following construction sequence shall be used during implementation of the plan.
1. The Contractor will use the existing construction access, if available. If a
stabilized construction entrance is not available, the contractor shall prepare one
in accordance with NC Erosion and Sediment Control Planning and Design
Manual: Temporary Gravel Construction Entrance/Exit: 6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as shown in
the plans. If necessary, erect any safety fences, silt fences, or barriers. Stockpile
materials that will be needed during the initial stages of construction.
3. The Contractor shall install a temporary sediment trap at the downstream most
location as identified on the plans.
4. The Contractor will use the existing stream crossing, if available. If a stream
crossing is not available, the contractor shall prepare one in accordance with NC
Erosion and Sediment Control Planning and Design Manual: Temporary Stream
Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around operations
for Phase l at locations specified on the plans. [Limits of each phase are
identified on the erosion control measures plan sheets.] The portion of the
channel isolated shall be dewatered and the removed water shall flow through a
special stilling basin according to project special provisions.
6. The Contractor shall begin excavation of the stream bank. Excavation shall begin
on the upstream end and work downstream.
7. Once a section of bank has been excavated to design grades, instream structures,
matting and plants shall be installed in that section per the direction of the
Engineer/Project Manager and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream coffer
dam, and finally the pump around operation, thereby allowing water to flow into
the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the Contractor
may begin construction of the next section (Phases 2 through 7) of the channel
beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth and
final Phase of the project. Depending upon site conditions and the degree of
existing disturbance, some minor earthwork may be proposed for the enhanced
area. Specifically, existing spoil piles and/or berms may be reshaped to provide a
more natural topography and flow regime through the enhanced wetland area.
ll. Once a stream or wetland work Phase is complete the Contractor will apply
temporary seeding, permanent seeding, and mulch to any other areas disturbed
during construction. Permanent seeding mixtures shall be applied as shown on
the vegetation plan. Temporary seeding shall be applied in all areas susceptible to
erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas) such that ground
35
New Hanover County Contract #03-0300
cover is established within 30 working days following completion of any phase of
grading. Permanent ground cover shall be established for all disturbed areas
within 30 working days or 120 calendar days (whichever is shorter) following
completion of construction.
12. The Contractor will install the interpretive sign at a location identified by the
Project Engineer/Manager. The sign will be provided to the contractor by the
client.
13. The Contractor shall insure that the site is free of trash and leftover materials prior
to demobilization of equipment from the site.
36
New Hanover County Contract #03-0300
EXHIBIT E: PROJECT SPECIFICATIONS
FU'CCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
A. GENERAL SPECIFICATIONS
The Contractor is required to install instream structures using a track hoe with a
hydraulic thumb of sufficient size and capability to manipulate boulders larger
than 4 feet x 3 feet x 2 feet (up to a maximum of 5 tons). The Contractor will be
required to provide, at a minimum, one track hoe with an operator at all times
during construction of the stream channel. The track hoe must have a hydraulic
thumb. A loader with an operator is strongly recommended, as well. In general,
one operator will excavate and shape the new channel and install instream
structures and bank stabilization practices. The loader shall haul excess soil to the
final location shown on the plans. A labor crew shall install seeding, matting and
plantings immediately following completion of a Phase by the heavy equipment.
Construction is scheduled to begin (to be determined), 2003 and to be completed
no later than (to be determined), 2003.
B. CONSTRUCTION SURVEY
The construction survey will be performed by Buck Engineering and shall include
location and layout of structures, slope and bench limits and wetland features. The
Contractor is not required to provide construction surveying or layout services
and will not bid on this item. However, the Contractor is required to keep laser
level equipment, along with a competent person skilled in its use, onsite for
maintaining grades.
C. MOBILIZATION AND DEMOBILIZATION
SCOPE
The work shall consist of the mobilization and demobilization of the Contractor's
forces and equipment necessary for performing the work required under the
contract. This work shall not include mobilization and demobilization for specific
items of work for which payment is provided elsewhere in the contract.
Mobilization will not be considered as work in fulfilling the requirement for
commencement of work.
EQUIPMENT AND MATERIALS
Mobilization shall include all activities and costs for transportation of personnel,
equipment, and operating supplies to the site; establishment of offices, and other
necessary facilities for the Contractor's operations at the site; premiums paid for
performance and payment bonds, including coinsurance and reinsurance
agreements as applicable; and other items as specified in this specification.
37
New Hanover County Contract #03-0300
Demobilization shall include all activities and costs for transportation of
personnel, equipment, and supplies not included in the contract from the site;
including the disassembly, removal and site clean up for this contract.
This work under Section C includes mobilization and demobilization required by
the contract at the time of the award. If additional mobilization and
demobilization activities and costs are required during the performance of the
contract as a result of the changed, deleted, or added items of work for which the
Contractor is entitled to an adjustment in contract price, compensation for such
costs will be included in the price adjustment for the item or items of work
changed or added.
METHODS
Items of work to be performed in conformance with these specification and
construction details, therefore, are:
1) This item shall consist of all work necessary to mobilize and demobilize
construction equipment as described above.
2) The Contractor is required to properly identify and secure the construction
accesses, staging areas, and material handling areas. Prior to construction
activities, the Contractor shall identify and mark boundaries of the staging
area as directed by the Engineer/Project Manager. Acceptable materials
for identifying the construction areas include highly visible tape and safety
fencing.
3) Stockpile all construction materials, including boulders, riprap, stone,
erosion control materials, etc. in the staging area. Any soil materials that
are stockpiled shall have a silt fence properly installed to ensure materials
are contained. Silt fence installation specifications are provided in Section
E: POLLUTION CONTROL and will not be bid under this section.
4) The Contractor shall provide watertight tanks or barrels sealed with plastic
sheets to be used to dispose of chemical pollutants, such as drained
lubricating or transmission oils, greases, soaps, concrete mixer wash
water, asphalt, etc., produced as a by-product of the construction work. At
the completion of construction, facilities shall be disposed of without
causing pollution.
5) Chemical toilets shall be placed at least 100 feet from streams, in the
staging area, and away from heavy equipment. At the completion of
construction work, facilities shall be disposed of without causing
pollution.
6) The Contractor will identify all underground and aboveground utilities and
is responsible for ensuring that these utilities are not damaged during
construction. The Contractor will promptly notify the project Engineer
Project Manager if there are conflicts between the utilities and the design.
38
New Hanover County Contract #03-0300
BASIS OF PAYMENT
Mobilization and demobilization activities as described above shall be paid for on
a lump sum basis. Half the lump sum will be payable following mobilization and
the remaining half of the lump sum will be payable following demobilization.
D. SAFETY FENCE
It is anticipated that no safety fencing will be needed for the proposed work.
E. POLLUTION CONTROL STRUCTURES
SCOPE
The work under this Section E shall consist of installing structural measures or
performing work to control erosion and minimize the production of sediment and
other pollutants to surrounding water resources during construction operations.
Pollution control for any disposal area outside of the project limits is the
responsibility of the Contractor and at no cost to the Owner.
EQUIPMENT AND MATERIALS
The Contractor shall refer to the North Carolina Sediment and Erosion Control
Manual (copies of selected practices in Appendix A) and the following
specifications: Sediment Fence (Temporary Silt Fence); Gravel Construction
Entrance/Exit; Temporary Stream Crossing (Ford); Temporary Sediment Traps;
and Special Stilling Basins. Estimated quantities of material requirements are
given on the plan sheets.
METHODS
The measures and works shall include, but are not limited to, the following:
Sediment Fence (Temporary Silt Fence) - Geotextile silt fences shall be used to
trap sediment from areas of limited runoff. Silt fence shall be properly anchored
to prevent erosion under them. These works are temporary and shall be removed
and the area restored to its original state when they are no longer needed or
permanent measures are installed. Locations for silt fence are shown on the plans.
Refer to silt fence specifications (6.62) in the North Carolina Sediment and
Erosion Control manual (copy provided in Appendix A).
Gravel Construction Entrance/Exit - A construction entrance is necessary for
the project to allow access to the site. An entrance may be built as part of the
development construction. This entrance may remain in place and the contractor
will be permitted to use the existing entrance. The contractor will share
39
New Hanover County Contract #03-0300
maintenance responsibilities with the site developer. If the entrance is not
available then an entrance will need to be constructed. The location of the gravel
construction entrance/exit is shown on the plans. The construction entrance shall
be constructed according to specifications 6.06 of the North Carolina Sediment
and Erosion Control Manual (copy provided in Appendix A).
Temporary Stream Crossing (Ford) - A temporary stream crossing (Ford) is
necessary for the project to allow crossing of the existing stream channel. A
crossing may be built as part of the development construction. This crossing may
remain in place and the contractor will be permitted to use the existing crossing.
The contractor will share maintenance responsibilities with the site developer. If
the crossing is not available then a crossing will need to be constructed. The
location of the temporary stream crossing is shown on the plans. The ford
crossing shall be constructed according to specifications 6.70 of the North
Carolina Sediment and Erosion Control Manual (copy provided in Appendix A).
Temporary Sediment Traps - Temporary sediment traps will be installed at the
end of the each section (phase) of stream channel as work within the section
(phase) is being constructed. These works are temporary and shall be removed
and the area restored to a stable condition when they are no longer needed or
permanent measures are installed. The locations of the temporary sediment traps
are shown on the plans. The temporary sediment traps shall be constructed
according to specifications 6.60 of the North Carolina Sediment and Erosion
Control Manual (copy provided in Appendix A).
Special Stilling Basins - Special stilling basin(s) shall be a water permeable
fabric bag that traps sand, silt, and fines as sediment laden water is pumped into it.
Special stilling basins will be installed at the discharge end of the flexible pipe
used in the set up of the temporary pump around operation. The temporary pump
around operation is used to divert stream flow around each section (phase) of
stream channel as work within the section (phase) is being constructed. Special
stilling basins are temporary and shall be removed and the area restored to a stable
condition when they are no longer needed. The locations of the special stilling
basins are shown on the plans. The temporary pump around operation is detailed
in the project plan sheets. The special stilling basin(s) shall be placed so the
pumped water flows into and through the bag without causing erosion. The neck
or spout of the bag shall be tied off tightly to stop the water from flowing out of
the bag without going through the walls.
The special stilling basin(s) shall be replaced and disposed of when it is 3/4 full of
sediment or when it is impractical for the bag to filter the sediment out at a
reasonable flow rate. Prior approval from the Engineer/Project Manager must be
received before removal and replacement. The Contractor shall be responsible for
providing a sufficient quantity of bags to contain silt from pumped effluent during
construction.
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New Hanover County Contract #03-0300
The special stilling basin(s) shall be a bag constructed to a minimum size of 10'x
15' made from a non-woven fabric. It shall have a sewn-in 8 in. (maximum) spout
for receiving pump discharge. The bag seams shall be sewn with a double needle
machine using a high strength thread. The seams shall have minimum wide width
strength as follows:
Test Method
ASTM D-4884
Minimum Specifications
60 lb/in
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:
Property Test Method Units Min. Specs.
Weight ASTM D-3776 oz/yd 8.0
Grab tensile ASTM D-4632 lb 200.0
Puncture ASTM D-4833 lb 130.0
Flow rate ASTM D-4491 gal/min/sf 80.0
Permittivity ASTM D-4991 ft/sec 1.5
UV Resistance ASTM D-4355 % 70.0
Diversion Pump and System - A pump shall be used to convey the base stream
flow around the work area during channel excavation, installation of structures,
and stabilization. The pump used must be able to convey approx.1._5 cubic feet
per second (approximately 600 gallons per minute). This conveyance discharge is
an estimate only; the contractor is responsible for determining and obtaining the
actual pump size necessary. The pump includes temporary flexible hose or pipe in
sufficient length to pump the water from the upstream side of the reach to the
downstream end of the reach as shown on the plans. A second pump will be
required to dewater the section of channel isolated by the impervious dikes, as
shown on the plan sheets.
Impervious Dikes An impervious dike is a temporary channel block that prevents
water from entering the section of channel under construction. Impervious dikes
are used in concert with the diversion pump and system for the purpose of
diverting normal stream flow around the construction site. The impervious dike
shall be constructed in such a manner, and of materials, acceptable to the
Engineer/Project Manager. Acceptable materials shall include, but not be limited
to, sheet piles, sandbags, and/or the placement of an acceptable size stone lined
with polypropylene or other impervious fabric. Earth material shall not be used to
construct an impervious dike when it is in direct contact with the stream.
Filter Fabric, Type 2 Non-woven - is a polypropylene nonwoven,
needlepunched fabric. This engineered geotextile is stabilized to resist
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New Hanover County Contract #03-0300
degradation due to ultraviolet exposure. It is resistant to commonly encountered
soil chemicals, mildew and insects, and is non-biodegradable.
Separation /Stabilization Geotextiles Guide Specification
Aashto M 288-2000 Class I Nonwoven Geotextile
Part 1 General
1.1 Work Included
This work shall consist of one of the following: furnishing and placing a
geotextile for use as a permeable separator to prevent inter-mixing of dissimilar
materials such as: subgrades and aggregate layer in a road, stone layers in erosion
control structures and stone layers in in-stream structures. The geotextile shall be
designed to allow passage of water while retaining in-situ soil and stone material.
1.2 References
ASTM D4491
ASTM D4751
ASTM D4632
ASTM D4833
ASTM D4533
ASTM D3786
- Permitivity
- Apparent Opening Size
- Grab Tensile Strength
- Puncture Resistance
- Trapezoidel Tear
- Mullen Burst
ASTM D4353 - Sampling of Geotextiles for Testing
ASTM D4355 - Ultraviolet Stability
ASTM D4873 - Guide for Identification, Storage, and Handling of Geosynthetics
ASTM D698 - Standard Test Method for Moisture-Density Relations of Soil
and Soil-Aggregate Mixtures (Standard Proctor)
1.3 Delivery, Storage, and Handling
A. The geotextile rolls shall be furnished with suitable wrapping for protection
against moisture and extended ultraviolet exposure prior to placement.
B. Rolls shall be stored in a manner which protects them from the elements.
C. If stored outdoors, they shall be elevated and protected with a waterproof
cover.
D. At no time shall the geotextile be exposed to ultraviolet light for a period
exceeding fourteen days.
E. The geotextile rolls shall be labeled as per ASTM D 4873, "Guide for
Identification, Storage, and Handling of Geosynthetics".
1.4 Method of Measurement
The geotextile shall be measured by the number of square yards computed from
the payment lines shown on the contract drawings or from payment lines
established in writing by the engineer. This excludes seams and overlaps but shall
include geotextiles used in the crest and toe of slopes. Slope preparation,
excavation and backfilling, bedding, and cover material are separate pay items.
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New Hanover County Contract #03-0300
1.5 Basis of Payment
A. The accepted quantities of geotextile shall be paid for per square yard in place.
Payment will be made under: Item E2: Filter Fabric, Type 2
Part 2 Products
2.1 Manufacturer and Local Supplier
Amoco Fabrics and Fibers Company, Austell, GA 30168
Ikex Inc., Middlesex, NC 27557 [phone]
2.2 Products
A. Fibers used in the manufacture of separation and stabilization geotextiles shall
consist of a material composed of at least 85 percent by weight polyolefins,
polyesters, or polyamides.
B. The geotextile and the threads used in sewing geotextiles shall be resistant to
chemical attack, rot, and mildew.
C. The geotextile shall have no tears or defects which adversely alter its physical
properties.
D. The geotextile shall be Amoco Style 4552 or approved equal, and shall meet
the physical requirements of Table 1-1. Amoco Style 4552 is a nonwoven
geotextile which meets AASHTO M 288-2000 requirements for Class 1 geotextile
used in separation and stabilization applications.
TABLE 2-1: Filter Fabric, Type 2
Property Test Method Minimum Average
Roll Value (English) Minimum Average
Roll Value (Metric)
Grab Tensile ASTM-D-4632 180 lb 0.800 kN
Grab Elongation ASTM-D-4632 50% 50%
Mullen Burst ASTM-D-3786 330 psi 2274 kPa
Puncture ASTM-D-4833 105 lb 0.465 kN
Trapezoidal Tear ASTM-D-4533 75 lb 0.330 kN
UV Resistance ASTM-D-4355 70 % at 500 hrs 70 % at 500 hrs
AOS(1) ASTM-D-4751 70 sieve 0.212 mm
Permittivity ASTM-D-4491 1.5 sec-1 1.5 sec-1
Flow Rate ASTM-D-4491 110 gal/min/ft2 4470 L/min/m2
Part 3 Execution
3.1 Site Preparation
The installation area shall be prepared by clearing all debris or obstructions which
may damage the geotextile. Trees and large bushes should be cut at ground level.
In most cases, all native vegetation, roots and topsoil must be removed from the
subgrade prior to geotextile placement.
3.2 Geotextile Placement
A. The geotextile shall be unrolled as smoothly as possible on the prepared
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New Hanover County Contract #03-0300
subgrade in the direction of water flow.
B. Geotextile rolls shall be overlapped in the direction of water flow.
C. If required, the geotextile may be held in place prior- to subbase placement with
pins, sand bags, or piles of fill or rock.
D. On curves, the geotextile may be folded or cut to conform to the curve
E. The fold or overlap shall be in the direction of water flow and shall be held in
place as prescribed above.
F. The geotextile shall not be dragged across the subgrade.
G. Damaged geotextiles shall be repaired immediately.
H. Damaged geotextile shall be repaired at no cost to the owner.
3.3 Aggregate Placement
A. The aggregate base or subbase (aggregate) shall be placed by end dumping
adjacent to the geotextile or over previously placed aggregate. End dumping or
tail gate dumping of aggregate on the geotextile will not be permitted.
B. The aggregate shall be spread from the backdumped pile using a trackhoe.
C. A sufficient thickness of aggregate should be in place prior to dumping to
minimize the potential of subgrade pumping and localized subgrade failure.
D. The aggregate shall be placed on the geotextile in lifts not less than 6-in. thick.
For low volume roads, the minimum lift may be reduced to a 4-in. thickness at the
discretion of the engineer.
E. Traffic shall not be permitted directly on the geotextile. Sudden stops or turns
by equipment operating on aggregate placed over the geotextile shall be avoided.
A smooth drum roller- shall be used to achieve specified aggregate density.
F. Any ruts occurring during construction shall be filled with additional aggregate
and compacted to the specified density. Vibratory compaction shall not be used
on the initial lift over the geotextile.
Other - Additional work as required by the Federal, State, or Local Government.
All pollution control measures and works shall be adequately maintained in a
functional condition as long as needed during the construction operation. All
temporary measures shall be removed and the site restored to as nearly original
conditions as practical.
BASIS OF PAYMENT
Payment for all pollution control measures will be made as follows. Such
payment will be full compensation for the work as described in the above
paragraphs and attached specifications.
Sediment fence will be paid on a per linear foot basis and shall include all
material and labor costs incurred in its proper installation, maintenance and
removal under Section E I: TEMP SILT FENCE.
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The gravel construction entrance/exit, temporary stream crossing (Ford) and
temporary sediment traps, will be paid for under Section E2: FILTER FABRIC
and Section I: STONE. Payment shall include all material, equipment and labor
costs incurred in the construction, maintenance and removal of these pollution
control devices.
The special stilling basin(s) to be paid for will be the actual number of bags used
during construction as specified and accepted by the Engineer/Project Manager.
The quantity of special stilling basin(s) as measured will be paid for at the
contract unit price each for E3: SPECIAL STILLING BASIN. Such price and
payment will be full compensation for all work covered by this provision,
including but not limited to, furnishing all materials, placing and maintaining the
special stilling basin(s), and removal and disposal of silt accumulations and bag.
The filter fabric and stone associated with the use of the special stilling basins will
be paid for under Section E2: FILTER FABRIC and Section I: STONE. All
other labor, and materials shall be considered incidental to the price of the special
stilling basin and no separate payment shall be made for such.
The diversion pump and system and impervious dikes will be paid as a lump
sum price under Section E4: DIVERSION PUMP AND SYSTEM. This pay item
covers equipment, materials, and labor associated with furnishing, installing,
maintain, and moving the pump and hose used to convey base stream flow during
construction and with the construction and de-construction of the imperious dikes.
The cost for the stone required as a part of the pump around operations will be
paid under Section I: STONE. All other labor, equipment and materials necessary
to install, maintain and move the system shall be considered incidental to the price
of the diversion pump and system and no separate or additional payment shall be
made.
The above prices and payments will be considered full compensation for all work
covered by this section.
F. TEMPORARY SEEDING, PERMANENT SEEDING AND MULCHING
SCOPE
The work under this section shall consist of temporary seeding, permanent
seeding, and mulching measures to control erosion and minimize the production
of sediment and other pollutants to water and air during construction operations.
Seeding will be used on all areas susceptible to erosion during and immediately
following construction, including, but not limited to excavated banks, access
areas, staging areas, and areas where excess soil will be spread. Seeding will take
place immediately after construction activities are completed in any disturbed
areas. Temporary seeding and permanent seeding shall take place simultaneously
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New Hanover County Contract #03-0300
and shall be immediately followed by mulching. The work shall consist of
preparing the area, furnishing and placing seed and mulch, and anchoring mulch
in the designated areas as specified.
EQUIPMENT AND MATERIALS
Temporary Seeding
For temporary seeding, apply the following vegetation at the listed rates and
times. A combination of the two seed types shall be used during the boundary
months of March, April, August and September to ensure survival.
Temporary Seeding (September to March):
Rye grain 3 Ibs per 1,000 sq ft or 130 Ibs per acre
Temporary Seeding (April to August):
Browntop Millet I lb per 1,000 sq ft or 45 lbs per acre
Permanent Seeding
For permanent seeding, apply the following vegetation at a rate of 15 pounds per
acre.
Riparian Seed Mix (Bottom of Channel to Top of Bank)
33% Virginia wild rye Elym.us virginicus
33% Switchgrass Panicum virgatum
34% Fox Sedge Carex vulpinoidea
Riparian Seed Mix (Top of Bank and Upland)
30% Big Bluestem Andropogon gerardii
30% Little Bluestem Schizachyrium scoparium
30% Indian Grass Sorghastrum nutans
10% Switch Grass Panicum virgatum
Mulching
Mulching shall be used to provide temporary protection of soil surfaces from
erosion. Mulching should be performed within 48 hours of seeding. Grain straw
mulch should be applied on seeded areas at a rate of 3 bales per 1,000 sq ft (130
bales per acre). Apply mulch uniformly.
METHODS
It is anticipated that the soil will be sufficiently loosened after construction to
allow for immediate planting of seed. A mechanical spreader shall be used to
broadcast seed. Seed shall not be broadcast by hand.
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New Hanover County Contract #03-0300
BASIS FOR PAYMENT
The quantity of temporary seeding will be paid for at the contract unit price per
pound of seed applied to the ground surface. The price includes all incidental
costs associated with obtaining and installing the seed under SECTION F I:
TEMPORARY SEEDING. The quantity of permanent seeding and mulching will
be paid at the contract unit price per acre of disturbed area seeded and mulched.
The price includes all incidental costs associated with obtaining and installing the
seed under SECTION F2: SEEDING AND MULCHING.
G. COCONUT (COIR) FIBER MATTING
SCOPE
Furnish materials, install and maintain Coconut (Coir) Fiber Matting in locations
shown on the plans or in locations as directed by the Engineer/Project Manager.
Locations will primarily be on new stream banks. Other problem areas may also
require the placement of coconut fiber matting. Work includes providing all
materials, excavating and backfilling, and placing and securing Coconut (Coir)
Fiber Matting.
EQUIPMENT AND MATERIALS
The coconut (coir) fiber erosion control matting shall be a machine-produced
100% biodegradable semi-permanent erosion control matting with a 100%r,
coconut fiber matrix with it functional longevity of approximately 4 to 6 years.
The matting shall be of consistent thickness with the coconut fiber evenly
distributed over the entire area of the matting. Wood Stakes are the only
acceptable means of securing the matting to the ground surface. Staples are not
acceptable and shall not be used. Wood Stakes shall be 12" in length and 2"
square, notched.
The Coconut (Coir) fiber- matting shall meet the following specifications:
Property Test Method BioD - Mat 70
Weight oz./s d ASTM D 3776 23.0
Weight s .m 780
Wet tensile strength ASTM D 4595
MD Ibs/ft 1488
CD Ibs/ft 1032
MD k N/m 21.7
CD k N/m 15.0
% Open area Calculated 48
Thickness inch ASTM D 1777 0.35
Recommended sloe > 1:1
Recommended flow (fps) 12
Recommended shear stress Ibs/s .ft 4.5
"C Factor 0.002
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New Hanover County Contract #03-0300
METHODS
Place the coconut (coin) fiber matting immediately upon final grading. Provide a
smooth soil surface free from stones, clods, or debris that will prevent the contact
of the matting with the soil. Apply seed prior to installing matting. Begin at the
bottom of the slope by anchoring the matting in a 6-inch (15 cm) deep by 6-inch
(15 cm) wide trench. Backfill and compact the trench after stapling (staking) with
5 evenly spaced stakes. Walking backward down the stream, allow the matting to
unroll slowly; ideally the matting roll will rest against your shin as you walk.
Stake the matting according to recommended staking pattern for specific product
and slope. (See staking pattern guide that comes with the product.) Place matting
loosely and in full contact with the soil. The edges of the parallel matting must be
staked with approximately 2 inches (5 cm) of overlap such that the edge of the
downstream matting is under the one just upstream. When matting must be
spliced down the slope, place matting end over end (shingle style) with
approximately 6 inches (15 cm) overlap. Stake through overlapped areas using 5
stakes. Place stakes across the matting at ends, junctions and trenches
approximately 1.3 ft (40 cm) apart. Place stakes along the outer edges, down the
center of each strip of matting and along all lapped edges approximately 2 feet (61
cm) apart. The Engineer/Project Manager may require adjustments in the
trenching or staking requirements to fit individual site conditions. Cut excess
matting and anchor at end of slope.
The contractor shall be responsible for the repair and maintenance of the coir fiber
matting installed throughout the construction period. Minor and major repair
work may be necessary at times during the construction period, particularly if the
site experiences significant storm events. Repair and maintenance will be at the
direction of the Engineer/Project Manager and this work shall be incidental to this
pay item and at the expense of the contractor.
BASIS OF PAYMENT
The quantity of coconut (coir) fiber matting measured will be paid for according
to the actual number of square yards installed along the surface of the ground and
accepted by the Engineer/Project Manager.
The quantity of coconut (coir) fiber matting, determined as provided above, will
be paid for at the contract unit price per square yard installed for ITEM G:
COCONUT (COIR) FIBER MATTING. Payment shall include all material,
equipment and labor costs incurred in obtaining, installing, maintaining and
repairing the coir fiber matting, including stakes.
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New Hanover County Contract #03-0300
H. EXCAVATION, FILL, GRADING, AND SITE PREPARA'T'ION
SCOPE
The Contractor shall excavate and grade the stream channel and created wetland
areas according to the design plans and as directed by the Engineer/Project
Manager. Typical cross sections and approximate contours are provided in the
drawings. The excavated material will be placed in stockpiles at locations
identified on the project plan sheets. It may be necessary to re-use excavated
material from the stockpile areas to balance cut and fill operations during project
construction. Following the completion of each phase of the project stockpiled
material shall be hauled to locations outside of the project limits as identified on
the plans. This item also includes site clearing, as necessary to perform the work.
The installation of instream structures or erosion control measures will not be bid
under this section.
METHODS
General Grading
The Contractor shall ensure that final grades on all stream channel are within 0.2
foot of the design contours, elevations, and slopes unless otherwise directed by
the Engineer/Project Manager. The contractor shall be instructed as to the target
elevation and slope and it shall be the responsibility of the contractor to maintain
the elevation and slope during grading. The contractor shall have on site, at all
times during grading operations, a laser level and a person skilled in its use to
assist the track hoe operator during channel excavation.
Site Preparation
Clearing of the stream channel banks and some areas within the enhanced
wetland, will be necessary. Any cleared trees, snag, roots, stumps, etc. shall be
chipped and distributed on site or hauled off and disposed of.
BASIS OF PAYMENT
The total volume of material to be excavated has been estimated in cubic yards.
Payment for all excavation, grading, and site preparation work as described above
shall be paid for on a lump sum basis regardless of discrepancies in estimated and
actual cubic yards of material excavated. Payment shall include all material,
equipment and labor costs incurred in site preparation, clearing, excavating,
stockpiling, filling, grading, hauling excavated material and disposing of cleared
debris. Excavation, fill, and grading shall be at the contract lump sum price as
ITEM HI: EXCAVATION, FILL, AND GRADING. Site preparation, which
includes all labor material and equipment for the handling, hauling and disposal
of cleared material, shall be at the contract lump sum price as ITEM H2: SITE
PREPARATION.
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New Hanover County Contract #03-0300
1. STONE
SCOPE
The work covered by this section consists of furnishing, stockpiling, placing and
maintaining approved stone to be utilized to construct cross-vane structures, weir
structures, all pollution control structures, and for use in other locations as
directed by the Engineer/Project Manager.
EQUIPMENT AND MATERIALS
Stone for "# 57 Stone"; "Class A Stone"; "Plain Rip-rap, Class B Stone"; "Plain
Rip-rap, Class I Stone"; and "Stone Boulders" shall consist of blasted granite
quarry stone stockpiled onsite and approved by the Engineer/Project Manager.
The stone shall be sound, tough, dense, resistant to the action of air and water, and
suitable in all other respects for the purpose intended.
All stone shall meet the approval of the Engineer/ Project Manager. While no
specific gradation is required, the various sizes of the stone shall be equally
distributed within the required size range. The size of an individual stone particle
will be determined by measuring its long dimension.
REQUIRED STONE SIZES (INCHES)
CLASS Minimum Average Maximum
# 57 Stone 0.25 0.5 1.5
Class B Stone, Plain Rip Rap 5 8 12
Class A Stone, Plain Rip Rap 2 4 6
Class 1 Stone, Plain Rip Rap 5 10 17
Stone Boulders 36 48 60
Boulders of approximate dimension 48" x 36" x 24"" (-I cubic yards, 5 Tons
max.) shall be individually picked by the Contractor from the quarry for use in the
cross-vane structures. Boulders shall be relatively flat on either side in the same
dimension, preferably the long dimension and must have square ends.
Unless otherwise approved by the Engineer/Project Manager, excavation to
prepare subgrade for the installation of rock cross vanes and weir structures shall
be consecutive and continuous. Once the excavation of a structure has begun, the
structure will be completed by the end of the workday. All equipment shall be
removed from the stream at the end of each workday
Filter Fabric, Type 2, non-woven
Filter Fabric, Type 2, non-woven shall be used in the construction of cross-vane
structures, weir structures, and pollution control structures. Filter fabric is used for
sealing structures and filtering and trapping sediment
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New Hanover County Contract #03-0300
METHODS
The Contractor shall place stone, in locations shown on the plans or as directed by
the Engineer/Project Manager, to the thickness, widths, and lengths as shown on
the plans and described in the specifications, or directed by the Engineer/Project
Manager. All stone shall be placed to form pollution control structures, rock
cross-vanes, or weir structures in accordance with the plans, neatly and uniformly,
and shall meet the approval of the Engineer/Project Manager.
The quantity of rock cross-vanes to be constructed will be affected by actual
conditions that occur during the construction of the project. The quantity of
structures may be increased or decreased at the direction of the Engineer/Project
Manager. The actual type and construction of the structures may also be altered at
the discretion of the Engineer/Project Manager to better conform to site
conditions. Such variations in quantity or form will not be considered as
alterations in the details of construction or a change in the character of the work.
BASIS OF PAYMENT
The quantity of all boulders and stone to be paid for will be the actual number of
tons of stone that has been delivered to and stockpiled on the project as directed
by the Engineer/Project Manager. The stone will be measured by being weighed
in trucks on certified platform scales or other certified weighing devices. Payment
will include the purchasing, transportation to the project site, and installation of
the stone. Stone purchased in excess of what is required for the project shall not
be paid for and shall be removed from the project site at the expense of the
contractor. Payment shall include all material, equipment and labor costs incurred
in obtaining, hauling, handling, installing, placing, and disposing of excess stone.
Stone shall be paid for at the contract unit price per ton as ITEM I: STONE.
Filter fabric, used to seal the rock cross-vanes and weir structures shall be paid for
on a per square yard installed basis as ITEM E2: FILTER FABRIC, TYPE 2
NON-WOVEN. Payment shall include all material, equipment and labor costs
incurred in obtaining, handling, and installing filter fabric, type 2, non-woven.
J. PLANTINGS
SCOPE
The work under this section shall consist of the supply, transport, and planting of
plants for the purpose of streambank stabilization, wetland creation and
enhancement of stream and wetland habitat.
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New Hanover County Contract #03-0300
EQUIPMENT AND MATERIALS
The Contractor shall provide plants and labor, materials and equipment for the
installation of the plants. Plantings shall be installed according to the following
species distribution:
Inner Berm to Tou of Bank
Common Name Scientific Name
15% Swamp Tupelo Nyssa biflora
15% Overcup Oak Quercus lyrata
15% River Birch Betula nigra
15% Sweetbay Magnolia virginiana
14% Swamp Red Bay Persea palustris
13% Wax Myrtle Myrica cerifera
13% Ironwood Carpinus caroliniana
Top of Bank
Common Name Scientific Name
17% Swamp Chestnut Oak Quercus michauxii
17% Laurel Oak Quercus laurifolia
17% Water Oak Quercus nigra
17% Sweetbay Magnolia virginiana
17% Swamp Red Bay Persea palustris
15% Wax Myrtle Myrica cerifera
Downstream End of Futch Creek
Common Name Scientific Name
20% Swamp Tupelo Nyssa biflora
20% Bald Cypress Taxodium distichum
20% Carolina Ash Fraxinus caroliniana
20% Parsley-leaf Hawthorne Crataegus marshallii
20% Buttonbush Cephalanthus occidentalis
Created /Enhanced Wetland Areas
Common Name Scientific Name
15% Soft Rush Juncus of fusus
15% Wool Grass Scirpus cyperinus
15%o Green Arrow-arum Peltandra virginica
14% Broadleaf Arrowhead Sagitaria latifolia
13% Pickerelweed Pontederia cordata
13% Lizard's Tail Saururus cernuus
15%o Tussock Sedge Carex stricta
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New Hanover County Contract #03-0300
METHODS
The contractor shall obtain and install potted plant material. If potted plants are
not available, bare root plants will be considered and the use of bare roots with be
at the discretion of the Project Engineer/Manager. Plants shall carefully be
planted. Care shall be given not to rip limbs or hark from the shrub and tree
plants nor damage the herbaceous wetland vegetation. Plants should be planted as
soon as practicable after delivery. Otherwise, plants will be carefully stockpiled
and cared for (watering, shading, etc.) during storage. The solidity of the plants
shall be carefully preserved.
Installation of shrub and tree plants shall be located in designated areas along the
top of the stream bank or in floodplain restoration areas as indicated on the project
plans or as directed by the Engineer/Project Manager. Herbaceous wetland
vegetation with be planted in designated areas in the created wetland area, as well
as in the wetland enhancement area. Soil in the area of vegetation planting shall
be loosened to a depth of at least I foot. This is only necessary on compacted
soil. The planting trench or hole shall be deep and wide enough to permit the
roots to spread out and down without J-rooting. The plant stem shall remain
upright. Soil shall be replaced around the planted vegetation and tamped around
the shrub or tree firmly to eliminate air pockets.
The contractor shall be responsible for the maintenance and replacement of
damaged plantings installed throughout the construction period. Minor and major
maintenance and replacement work may be necessary at times during the
construction period, particularly if the site experiences significant storm events.
Maintenance and replacement will be at the direction of the Engineer/Project
Manager and this work shall be incidental to this pay item and at the expense
of the contractor
BASIS OF PAYMENT
The quantity of plantings will be paid for at the contract unit bid price per plant
installed and accepted by the Engineer/Project Manager. Unit price payments will
be considered full compensation for all work covered by this Section, including,
but not limited to, furnishing, stockpiling, installing, and maintaining plantings, as
well as replacing damaged or dead plantings. Tree and shrub plants shall be paid
for at the contract unit price per each as ITEM J 1: TREE AND SHRUB
PLANTINGS. Herbaceous wetland vegetation shall be paid for at the contract
unit price per each as ITEM J2: WETLAND VEGETATION PLANTINGS
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New Hanover County Contract #03-0300
K. LIVE STAKING
SCOPE
The work under this section shall consist of the installation of live stakes on
stream banks to be protected from erosion. The Contractor will be responsible for
obtaining and delivering the live stakes to the project site, and installation of the
live stakes. The contractor may also purchase live stakes from a plant nursery.
Staking must take place during the dormant season (November - March).
EQUIPMENT AND MATERIALS
Live stakes may be of the following species:
Black Willow Salix nigra
Silky Willow Salix sericea
Silky Dogwood Cornus antomum
Elderberry Sambucus canadensis
if silky willow and black willow are used, they should make up no more than 30%
of the total number of stakes planted. The remaining 70% of stakes should be
silky dogwood and elderberry.
METHODS
Live stake materials should be dormant and gathered locally or purchased from a
reputable commercial supplier. Stakes should be at least 1/2 inches and no more
than 2 inches in diameter and between 2 and 3 feet in length, and living based on
the presence of young buds and green bark. Stakes shall be angled on the bottom
and cut flush on the top with buds oriented upwards. All side branches shall be
cleanly trimmed so the cutting is one single stem. Stakes should be kept cool and
moist to improve survival and to maintain dormancy.
Planting shall take place between November 15 and March 15. Stakes should be
installed 2 to 3 feet apart using triangular spacing or at a density of 300 stakes per
1,000 ft2 along the stream banks as indicated in the plans. Site variations may
require slightly different spacing. Stakes shall be driven into the ground using a
rubber hammer or by creating a hole and slipping the stake into it. The stakes
should be tamped in at a right angle to the slope with 4/5 of the stake installed
below the ground surface. At least two buds (lateral and/or terminal) shall remain
above the ground surface. The soils shall be firmly packed around the hole after
installations. Split stakes shall not be installed. Stakes that split during
installations shall be replaced.
BASIS OF PAYMENT
The quantity of live stakes planted will be paid for according to the actual number
54
New Hanover County Contract #03-0300
of live, viable stakes planted in a manner acceptable to the Engineer/ Project
Manager. Live stakes shall be paid for at the contract unit price per each as ITEM
K: LIVE STAKES and includes all labor, material and equipment necessary for
the collection, delivery, and proper installation of the stakes in the stream bank.
L. INTERPRETIVE SIGN INSTALLATION
SCOPE
The work under this section shall consist of the installation of an interpretive sign
at a location to be determined in the filed by the Project Engineer/Manager. The
sign will be provided to the contractor and the contractor will be responsible for
the proper handling and installation of the sign. The installation of the sign will
likely require the excavation of a post hole and the mixing and placement of
concrete mix of a type and quantity appropriate for this type of this task.
EQUIPMENT AND MATERIALS
The contractor will provide labor, equipment and materials necessary for the
correct and appropriate method of installation as determined by the manufacturer
of the sign and as directed by the Project Engineer/Manager. The sign will be
provided, but all other tools, equipment and materials are considered incidental to
the installation.
METHODS
The sign shall be installed according to the manufacturer's specifications. It is
anticipated that installation will require the excavation of a small diameter hole of
sufficient depth to adequately support the sign. Installation will likely specify the
placement of concrete mix (type to be determined) around the sign post. The
contractor shall follow all of the sign manufacturer's recommendations, as well as
those of the concrete manufacturer as listed on the product label.
BASIS OF PAYMENT
The installation of the interpretive sign will be paid for at the contract lump sum
price as ITEM L: INTERPRETIVE SIGN INSTALLATION and includes all
labor, material and equipment necessary for the installation of the sign.
55
New Hanover County Contract #03-0300
APPENDIX A: SELECTED EROSION CONTROL PRACTICES COPIED FROM
THE NC SEDIMENT AND EROSION CONTROL MANUAL
FLITCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
56
EXHIBIT D: GENERAL CONSTRUCTION SEQUENCE
FUTCH CREEK STREAM AND WETLAND ENHANCEMENT PROJECT
The following construction sequence shall be used during implementation of the plan.
1. The Contractor will use the existing construction access, if available. If a
stabilized construction entrance is not available, the contractor shall prepare one
in accordance with NC Erosion and Sediment Control Planning and Design
Manual: Temporary Gravel Construction Entrance/Exit: 6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as shown in
the plans. If necessary, erect any safety fences, silt fences, or barriers. Stockpile
materials that will be needed during the initial stages of construction.
3. The Contractor shall install a temporary sediment trap at the downstream most
location as identified on the plans.
4. The Contractor will use the existing stream crossing, if available. If a stream
crossing is not available, the contractor shall prepare one in accordance with NC
Erosion and Sediment Control Planning and Design Manual: Temporary Stream
Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around operations
for Phase 1 at locations specified on the plans. [Limits of each phase are
identified on the erosion control measures plan sheets.] The portion of the
channel isolated shall be dewatered and the removed water shall flow through a
special stilling basin according to project special provisions.
6. The Contractor shall begin excavation of the stream bank. Excavation shall begin
on the upstream end and work downstream.
7. Once a section of bank has been excavated to design grades, instream structures,
matting and plants shall be installed in that section per the direction of the
Engineer/Project Manager and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream coffer
dam, and finally the pump around operation, thereby allowing water to flow into
the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the Contractor
may begin construction of the next section (Phases 2 through 7) of the channel
beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth and
final Phase of the project. Depending upon site conditions and the degree of
existing disturbance, some minor earthwork may be proposed for the enhanced
area. Specifically, existing spoil piles and/or berms may be reshaped to provide a
more natural topography and flow regime through the enhanced wetland area.
11. Once a stream or wetland work Phase is complete the Contractor will apply
temporary seeding, permanent seeding, and mulch to any other areas disturbed
during construction. Permanent seeding mixtures shall be applied as shown on
the vegetation plan. Temporary seeding shall be applied in all areas susceptible to
erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas) such that ground
cover is established within 30 working days following completion of any phase of
grading. Permanent ground cover shall be established for all disturbed areas
within 30 working days or 120 calendar days (whichever is shorter) following
completion of construction.
12. The Contractor will install the interpretive sign at a location identified by the
Project Engineer/Manager. The sign will be provided to the contractor by the
client.
13. The Contractor shall insure that the site is free of trash and leftover materials prior
to demobilization of equipment from the site.
Item Description Quantity Unit Unit
Price Amount Bid
C Mobilization/Demobilization 1 LS
E1 Temp Silt Fence 400 LF
E2 Filter Fabric, Type 2 Non-
Woven
750
SY
E3 Special Stilling Basin 8 EA
E4 Diversion Pump and System 1 LS
F1 Temp Seeding (Rye Grain) 280 LBS
F2 Seeding and Mulching 2.15 ACRES
G Coconut (Coir) Fiber Matting 10,500 SY
H1 Excavation, Fill, Grading 2300 LS
H2 Site Preparation 1 LS
11 Stone Boulders (4' x 3' x 2') 440 TONS
12 Class I Stone, Plain Rip-rap 80 TONS
13 Class A Stone, Plain Rip-rap 45.00 TONS
14 Class B Stone, Plain Rip-rap 12 TONS
15 #57 Stone 100 TONS
it Tree and Shrub Plantings 1450 EACH
J2 Wetland Vegetation Plantings 525 EACH
K Live Staking 1200 EACH
L Interpretive Sign Installation 1 LS
EROSION CONTROL
NARRATIVE
Tributary to Futch Creek Stream and Wetland Enhancement Project
New Hanover County, North Carolina
Prepared by:
BUCK 6000 Regency Parkway
Suite 200
Cary, North Carolina 27511
Phone: [phone]
- Fax: [phone]
www. huckenglneering. com
JUly 2003
Tributary to Futch Creek Erosion Control Narrative
Introduction
This narrative is submitted as part of the proposed Sediment and Erosion Control Plan for
the Tributary to Futch Creek Stream and Wetland Enhancement Project. The construction
of the project will involve the sloping back of one stream bank, the installation or Cross-
Vane and Step Pool structures and the enhancement of 2 acres of an existing bottomland
wetland.
Project Description
New Hanover County proposes to stabilize and enhance approximately 1,600 feet of
stream and enhance 2 acres of wetlands for water quality improvement purposes. The
stream that runs through the site is an unnamed tributary to Futch Creek. In its existing
condition, the tributary is an incised, channelized stream that provides drainage for the
surrounding area. The goal of the project is to stabilize the stream as a means of
controlling erosion and to reduce the amount of sediment now entering the tributary to
Futch Creek. Two acres of an existing wetland ecosystem located just below the
tributary will be enhanced via planting. Depending upon site conditions and the degree of
existing disturbance, some minor earthwork may be proposed for the enhanced area.
Specifically, existing spoil piles and/or berms may be reshaped to provide a more natural
topography and flow regime through the enhanced wetland area. By stabilizing the bed
of the stream, increasing the flood prone area, reducing the slope of the stream channel,
and allowing the water to flow through a dense stand of wetland vegetation, water quality
will be improved as sediment and other particles settle out in the slower moving water.
Chemical activity associated with wetland ecosystems will further improve water quality.
Watershed size (i.e. drainage area) at the outlet of the project is approximately 0.3 square
miles. Most drainage originates off-site from neighboring lands and roadways upstream.
The proposed design involves the stabilization of the stream channel by installation of
cross-vane structures, an increase in the flood prone area via grading, and the
enhancement of 2 acres of wetlands.
This stream stabilization project area is located within a larger site development project.
Sagewood at Plantation Landing is a single and multi-family housing development that
encompass a total of 44.2 acres. This development surrounds the tributary to Futch Creek
Stream and Wetland Enhancement Project. A second phase, Future Phases at Plantation
Landing, is in the early stages of planning and will ajoin the wetland enhancement area.
Site Conditions
The Futch Creek watershed is located in northeastern New Hanover County,
approximately 8 miles southeast of Castle Hayne. Futch Creek begins as a series of
channelized ditches east of Highway 17 and flows approximately 3 miles to the
Intracoastal Waterway and Middle Sound, approximately seven miles north of
Wrightsville Beach. The project reach begins just south of Highway 17, and extends
downstream to existing wetland areas. The total watershed area at the downstream end of
the project reach is approximately 0.3 square miles. Futch Creek is classified as SA and
HQW by the North Carolina Division of Water Quality. The "SA" designation indicates a
tidal salt water system suitable for marketable shell fishing. All waters designated as
"SA" are also minimally designated as "HQW," or High Quality Waters.
Soil survey data were obtained for the project site from the Natural Resource
Conservation Service (NRCS, 1977). Based on this information, the northeastern
streambank of Tributary to Futch Creek and the adjoining property are mapped as the
Baymeade (Be), Johnston (JO), Leon (Le), and Murville (Mu) series. The southwestern
bank of Tributary to Futch creek is primarily Johnston soil with upslope soils mapped as
Kenansville (Ke), Lynn Haven (Ly) and Rimini (Rm). One lobe of Rimini soil exists
upstream of Tributary to Futch Creek on the project property. Of the soils series
identified by the county soil survey, the Johnston, Leon, Murville, and Lynn Haven series
are considered hydric by the Natural Resource Conservation Service (NRCS, 1995).
Erosion and Sedimentation Control Measures
Erosion control methods to be used in the project include Sediment Fence (Silt Fence);
Temporary Sediment Traps; Special Stilling Basins; Temporary Seeding and Mulching,
Permanent Seeding, and Coconut (Coir) Fiber Erosion Control Matting. All sediment and
erosion control measures are to be built according to the plans and specifications.
Additionally, a temporary Gravel Construction Entrance/Exit and a Stream Crossing will
be permitted, installed, and maintained as part of the larger development associated with
Sagewood at Plantation Landing.
Channel grading will occur in Phases as identified on the plan sheets. Each phase, or
section, of channel will be isolated by the use of impermeable dikes and the section
dewatered with a pump around operation. Water pumped from the isolated section of the
channel will be filtered through a special stilling basin to remove sediment. Silt checks
will be constructed at regular intervals within the stream channel at locations shown on
the plans to trap sediment.
Material excavated from the channel banks will be temporarily stock piled to ensure
balance between cut and fill. Stockpiles will be located as shown on the plans and silt
fences will be used to prevent erosion of the stockpiles toward the open channels on site.
Excavated material that exceeds cut/fill needs will be moved to a central stockpile area
within the Sagewood at Plantation Landing site development project area. This soil will
be used on site in the overall site grading process.
Design Standards
Erosion control practices, methods, and procedures described in these plans and
specifications are based on those presented in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
Maintenance Plan
All temporary erosion and sediment control practices will be evaluated for stability and
operation by qualified personnel on a daily basis. Any needed repairs will be performed
immediately to maintain all practices as designed. The project engineer will be
responsible for the maintenance of temporary on-site erosion control measures:
Buck Engineering
Douglas Smith - Project Manager
8000 Regency Parkway, Suite 200
Cary, NC 27511
[phone]
The maintenance requirements for permanent measures will be the responsibility of the
land owner:
New Hanover County
c/o Chris O'Keefe
New Hanover County Planning Department
230 Marketplace Drive, Ste. 150
Wilmington NC 28403
[phone]
General Construction Sequence
The following construction sequence shall be used during implementation of the plan.
1. The Contractor will use the existing construction access, if available. If a
stabilized construction entrance is not available, the contractor shall prepare
one in accordance with NC Erosion and Sediment Control Planning and
Design Manual: Temporary Gravel Construction Entrance/Exit: 6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as
shown in the plans. If necessary, erect any safety fences, silt fences, or
barriers. Stockpile materials that will be needed during the initial stages of
construction.
3. The Contractor shall install a temporary sediment trap at the downstream most
location as identified on the plans.
4. The Contractor will use the existing stream crossing, if available. If a stream
crossing is not available, the contractor shall prepare one in accordance with
NC Erosion and Sediment Control Planning and Design Manual: Temporary
Stream Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around
operations for Phase 1 at locations specified on the plans. The portion of the
channel isolated shall be dewatered and the removed water shall flow through
a special stilling basin according to project special provisions.
6. The Contractor shall begin excavation of' the stream channel and bank.
Excavation shall begin on the upstream end and work downstream.
7. Once a section of channel has been excavated to design grades, instream
structures, matting and plants shall be installed in that section per the direction
of the Engineer/Project Manager and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream
coffer dam, and finally the pump around operation, thereby allowing water to
flow into the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the
Contractor may begin construction of the next section (Phases 2 through 7) of
the channel beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth
and final Phase of the project. Depending upon site conditions and the degree
of existing disturbance, some minor earthwork may be proposed for the
enhanced area. Specifically, existing spoil piles and/or berms may be
reshaped to provide a more natural topography and flow regime through the
enhanced wetland area.
1. Once a stream or wetland work Phase is complete the Contractor will apply
temporary seeding, permanent seeding, and mulch to any other areas disturbed
during construction. Permanent seeding mixtures shall be applied as shown
on the vegetation plan. Temporary seeding shall be applied in all areas
susceptible to erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas)
such that ground cover is established within 30 working days following
completion of any phase of grading. Permanent ground cover shall be
established for all disturbed areas within 30 working days or 120 calendar
days (whichever is shorter) following completion of construction.
12. The Contractor shall insure that the site is free of trash and leftover materials
prior to demobilization of equipment from the site.
Project Location Map for the Tributary to Futch Creek Stream Stabilization and
Wetland Creation and Enhancement Project.
MAP[;V ?jdscorner., '"` ., ° O: Skin
O Walkers ?11 - st H21el?d t, So ;r
vamac7aw 40 ° Walkers store
° Tho as Landinv
1 11
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BarlowP rx,Ct
° 1 Long Creek ?
Long Bluff Landing a ells cross, ads' oodside urf Clty
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HIpstea psall Beach-
CastVHay'ne 419'
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' 132 ?
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ri °n•., 74 i.. 421
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s u
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sea Belez 9rtle souY{d m , ¢ F S zeY
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MEMORANDUM
TO:
John Dorney
Non-Discharge Branch
Regional Contact: Noelle Lutheran
WQ Supervisor: Rock Striver
Date:
SUBJECT:
WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Tributary to Futch Creek, Stream and Wetland
Project Number 03 1221
Recvd From APP
Received Date 10/3/03 Recvd By Region
Project Type Stream and Wetland Enhancement Work
County New Hanover
County2
Region Wilmington
Certificates Stream Stream Impacts (ft.)
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req. ME
13 BLH O Y O N 18-87-19 SA 14QW 30,624. _200F_ 1,675.0 -?
Stream O Y O N F`F-F-F77-F- 1,675.00' 1
Mitigation Wetland
MitigationType Type Acres Feet
Wetland enhance BLH 2.00 F
-SVeam enhance Stream F_ 1,675.00
I-- r I F_
Is Wetland Rating Sheet Attached? Q Y O N Did you request more Info? Q Y O N
Have Project Changes/Conditions Been Discussed With Applicant? Q Y O N
Is Mitigation required? Q Y Q N Recommendation: QQ Issue O Issue/fond O Deny
Provided by Region: Latitude (ddmmss) Longitude (ddmmss)
Comments:
This office has no objection to this prof .rP .t as proposed. Use of rock cross vanes has been justified
by design engineer. Written concrrence from DWQ is not required provided that all of the conditions
of Water Quality ertification #3399 are met,
cc: Regional Office
Central Office Page Number 1
Triage Check List
Date: 10 I7103 Project Name: F111" Cr Stre'i ' j Wet lahj & 1, am cc vVl(h7
DWQ#:
0;/22- 1
County: lVew d-Aover-
To: ? ARO Mike Parker ? WaRO Tom Steffens
? FRO Ken Averitte WiRO Noelle Lutheran
? MRO Alan Johnson ? WSRO Daryl Lamb
? RRO Steve Mitchell
From: t a r t y L Telephone : [phone]/
The file attached is being forwarded to your for your evaluation.
Please call if you need assistance.
? Stream length impacted
? Stream determination
? Wetland determination and distance to blue-line surface waters on USFW topo maps
Minimization/avoidance issues
? Buffer Rules (Neuse, Tar-Pamlico, Catawba, Randleman)
? Pond fill
? Mitigation Ratios
? 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
Comments: I'47 A pi-4 1 S-F-,„ /ve H". 6v2/ CO A - 'a S nyle e0c. 1[ t/
t f RIOnC Cuo -t0^'f W 01tK Cy-oil vixel i/, lIR)t' of S'???yH,i faf/ Mvcl, 4r
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i
BUCK PROJECT REFERENCE N0. SHEET N0.
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t / ~ ~ i ~ ~ i ~ PROJECT ENGINEER
1 / / ~ ~ ~ i ~ ~ ~
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N , ` ~ i / ~i f , / , ~ STAGING AND , ;AGING AND ~.y;. ` , ~ r -
4 1 • I ` 1 ~ STOCKQILE AREA ~KQILE AREA , ~
i I - _ _ _ _ ~ ' ' FOR P}iASES 1-3 , ~ ~ . ~ 1 2 P SES 1-3 ~ ~ P ELIMI ~ , , r R NARY PLANS
t~ ` _ . DO NOT U8B FO CO ~ t~ , . 1 , _ ~ R NBTRUCTION 1,
~i w ~ ~ i PROPOSE6 _ ~ ~ ~ PROPO ED PHASE 3 - 250 r
o i. 1 ~ FIRE HYQR FIRE HYDRANT ~ 16+00 TO 18+50 ! ,1 - ~ ~
v;~ i / I//~. 4 i ~1, - ~ ,
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W ~ ' y ~ PHASE. 2 =300 ~ ~ lNE ~TYP) , UT ~ ,
ca . 13+00 T~ 16+00 ~ ~ 1 _
/ I • \ ~ °>•g; ~ ~ ~ 8000 Regency Parkway Suite 200 tS ~'r=uw1 Q _F ~ ~ • Cary, North Carolina 27511
i ~ ~ E 7• t ~ t ~ Phone: [phone]
_ ~ ; ~ ~ 'i PHASE 1 300 It ~ t,.. _ ~ SNtiINHSFRINd Fax: [phone] ~ f Z
10+00 TO 13+00 ~ ~ ~ ' ~ y~~ e. 4, ~ , ~ T
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I STREAM CROSSING..,., M.~;.
' ~ ALL DISTURBED ~ 55 1 r~ BANKS°~' / r ;.r;~ / : ~ -.i r,,,--,- (PERMITTED AND INSTALLED "BY~ OTHER$ ~ = _ _ . _ _ ~ r k -
s WILL BE TR TED WITH / ~ ~'r~ ' ' 105.00' ' COIR FIBER TTING j ~ - ;Y 36 SD I ~ - _ _ ~
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-itl t' / ~ I ~ TEMPORARY GRAVEL CONSTR UCTlON ENTRANCE AND
ii:l~ 1~ 1 / . • ~ ~ t ~ `•t TEMPORARY STREAM CROSSING SHALL BE PERMITTED ` ' UNDER THE SAGEWOOD PROJECT BY ~ ;
W 'fit. 1 l / N~,;i ' NEW HANOVER COUNTY.
i_;: • O~,((yy ...i........~. ~ ~ ~ PERMIT NUMBER; GP 2303
g , ~RI~§ ~~RE-W~ 1""~•• 1_,,,,,,~ ~ ' ~ TEMPORARY GRAVEL CONSTRUCTION ENTRANCE L (OFFSITE) AND TEMPORARY STREAM CROSSING SHALL
GREEN - _ $1__~-____ - - 1 rrL'11'^" _ _ _ .,.r., ~ '~-8 ~ BE INSTALLED AND MAINTAINED BY SITE DEVELOPER. 1~-E -4-F--~J`~ t
wr - -'t'~--- ~ r - _ _ _ _ SOIL STOCKPILE AREA LOCATED ON LOT56. REFERT
i ~ ~ _ 0 SITE DEVELOPMENT PLAN. APPROXIMATELY 300 FEET
FROM CHANNEL.
_ ~ _ ~ _ _ _ _ w _ _ /
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1 \ , STOCKPI AREAS" ~ ' J ~ i/ J.
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_ _ RASE ~6 - - ,
R ~ _ ~ -
- F s~ PHASE 5 = 2 0' 23+50 TO 26 50 _ • _ - s~ ` ~ ~ l p~.. 3 ~ + + ALL DISTURBEQ~ SANKS_ _ _ _ - _ - _ 0 ~ 21 00 TO 23 ti r
S S ! WILL BE~1'REA'f~ED.,, T}i~ ~ _
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'1: ~ ~ > - ~i , I ~ ` : -AS~PER DIRECTU IRECTION OF PROJECT EROSION ONT D C R PER OL
: - ~ - - ,y, ENGINEER. ~ GINEER. MEAS RE U S
i,. s~ ~ ~ i. ,
• - , ~ , i - - l;it; EXCAVATE RIG - . a: _ . _ _ . % ~,•t G THIS REr CAVATE RIGHT BANK (AT 2:1)
. ~ ~ - ALON DNG THIS REACH. 50 25 0 50 100
/ li ~ , y~t~' !Pii ~ -
~~;~~i~i SCALE F

BUCK PROJECT REFERENCE N0. SHEET N0.
01388 RF-1
m TYPE 1 STREAMBANK REFORESTATION SHALL BE PLANTED 10 FT. ON CENTER, RANDOM PROJECT ENGINEER
SPACING, APPROXIMATELY 436 PLANTS PER ACRE.
N TYPE 2 STREAMBANK REFORESTATION SHALL BE PLANTED 10 FT. ON CENTER, RANDOM
N SPACING, APPROXIMATELY 436 PLANTS PER ACRE.
NOTE: TYPE 1 AND TYPE 2 STREAMBANK REFORESTATION SHALL BE
IL T TI I I PAID FOR AS'TREE AND SHRUB PLANTINGS TYPE 4 SHALL BE PAID FOR AS "LIVE STAKING" PRELIMINARY PLANS
P DO NOT USE FOR CONSTRUCTION
I
T
1. LOCATE AHEALING-IN SITE IN A SHADY, WELL
PROTECTED AREA.
2. EXCAVATED A FLAT BOTTOM TRENCH
12 INCHES DEEP AND PROVIDE DRAINAGE. i i I I
~II 8000 Regency Parkway Suite 200 Cary, North Carolina 27511
2 inch Phone: [phone]
n I I ENGIN>IrERINCi Fax: [phone]
l~
~l I TYPE II AND _ SEED MIX TYPE II a ~
I I p} z Z I- Y
i Q X Fa-
W~ N 0-p w
~w
N J
1. INSERT PLANTING BAR 2. REMOVE PLANTING BAR 3. INSERT PLANTING BAR
AS SHAOWN AND PULL HANDLE AND PLACESEEDING AT 2 INCHES TOWARD PLANTER
TOWARD PLANTER. CORRECT DEPTH. FROM SEEDING.
3. BACKFILL THE TRENCH WITH 2 INCHES OF WELL
ROTTED SAWDUST. PLACE A 2 INCH LAYER OF
WELL ROTTED SAWDUST AT A SLOPING ANGLE
ATONE END OF THE TRENCH. -j•-r .
`'4.
~r~
~ 'J - STREAM
HEETS RF 2 FOR AREAS TO BE PLANTED SEE PLAN S
Temporary Seed Mix
' ~ 5 .
Winter Rye (Fall-Winter), Brown-top Millet (Spring-Summer) I ENHANCED WETLAND TREES AND SHRUBS (TYPE IV)
TO F TOP OF BENCH TO 1/2 SLOPE (TYPE )
Cor cientific Name Common Name Scientific Name Common Name S Swamp Tupelo Nyssa biflora
Swo Swamp Tupelo Nyssa biflora Bald Cypress Taxodium distichum
4. PLACE A SINGLE LAYER OF PLANTS ovE Overcup Oak Quercus lyrata Carolina Ash Fraxinus caroliniana River Birch Setula nigra Parsley-leaf Hawthorne Crataegus marshallii
AGAINST THE SLOPING END SO THAT Rive THE ROOT COLLAR IS AT GROUND LEVEL. ~ Sw~ Sweetbay Magnolia virginiana Buttonbush Cephalanthus occidentalis
Sw~ Swamp Red Bay Persea palustris Wax Myrtle Myrica cerifera RIPARIAN SEED MIX (BOTTOM OF CHANNEL TO
6. LEAVE COMPATION wa • . ~ iror Ironwood Carpinus caroliniana 112 SLOPE (SEED MI TYPE I)
4. PULL HANDLE OF BAR 5. PUSH HANDLE FORWARD LE OPEN. WATER t HO RD PLANTER FIRMING FIRMINGSOILATTOP. TOWA THOROUGHLY. Common Name Scientific Name
1; AT BOTTOM. r $OIL TOI TOP OF BANK TO 1/2 SLOPE (TYPE II) Switch Grass Panicum virgatum Virginia Wild Rye E/ymus virginicus
:~+ti: ~r: Coi Common Name Scientific Name Fox Sedge Carex vulpinoidea
Sw Swamp Chestnut Oak Quercus michauxii
• TE ~a~ IN T LA N P Laurel Oak Quercus laurifolia RIPARIAN SEED MIX (TOP OF BANK AND UPLAND) Water Oak Quercus nigra (Seed Mix Type )
. Sw Sweetbay Magnolia virginiana Common Name Scientific Name
wa Swamp Red Bay Persea palustris Big Bluestein Andropogon gerardii Wax Myrtle Myrica cerifera Little Bluestein Schizachyrium scoparium
• ' • , ~ • ' • ~ PLANTING BAG Indian Grass Sorghastrum nutans Switch Grass Panicum virgatum
• DURING PLANTING, SEEDLINGS WETLAND VEGETATION PLANTING (TYPE III)
' ~ ~ ' • • • ~ . SHALL BE KEPT IN A MOIST we ' CANVAS BAG OR SIMILAR `
NTAINER TO PREVENT THE co CO Sol Common Name Scientific Name Soft Rush Juncus effusus
ROOT SYSTEMS FROM DRYING. ~ ~ Wool Grass Scirpus cyperinus
GE A 2 INCH LAYER OF WEL ROTTED W 5. PLA MAINTAINING ~ VER THE ROOTS KBC PLANTING BAR G re Green Arrow-arum Peltandra virginica Broadleaf Arrowhead Saggitaria latifolia
SAWDUST 0 ~ t3 rc A SLOPING ANGLE. ~ PLANTING BAR SHALL HAVE A p;o 1 Pickerelweed Por?tederia cordata
BLADE WITH A TRIANGULAR ~;Z; Lizard's Tail Saururus cernuus Tussock Sedge Carex stricta
CROSS SECTION, AND SHALL Tu; - ~ BE 12 INCHES LONG, . i
' ' 4 INCHES WIDE AND LIVE STAKING
' TER. uv 1 INCH THICK AT CEN
Co ~ ROOT PRUNING sill Common Name Scientific Name Silky Dogwood Corpus amomum
ALL SEEDLINGS SHALL BE ROOT SiIN PRUNED, IF NECESSARY, SO THAT Silky Willow Salix Sericea
' ' ' • ' NO ROOTS EXTEND MORE THAN
' ~ . • NCHESBELOWTHE 101
' ~ ROOT COLLAR.
N TAKI VE LI
TOP OF STREAMBANK
' SQUARE CUT TOP
6. REPEAT LAYERS OF PLANTS AND SAWDUST • 2'-3' BETWEEN STAKES BUDS FACING UPWARD
AS NECESSARY AND WATER THOROUGHLY. . • • . • • 2'-3' BETWEEN STAKES • ' LIVE CUTTING
F BANK MIN. 112" DIA TOE 0 ~ 18"-30"LENGTH
PLANTING PROCEDURE FOR
NER GROWN TREES AND SHRUBS CONTAI . ' ~ ~ ~ BOTTOM OF CHANNEL
- I o 0
• ~ ~ ~ ~ ANGLE CUT 30 - 45 DEGREES
1"DEEP "X" ON
BOTTOM OF R00T BALL 1"DEEP TION VIEW OF LIVE STAKING SPECIFICATION CROSS-SEC
LIVE STAKE DETAIL
~ VERTICAL SLICE
~ UNG ROOTS OF CONTAINER REMOVE THE PLASTIC CONTAINER AND TOP 0 CUT THE CIRC FILL THE HOLE 314 FULL OF TAMPED SOIL TOP OF TOP OF STREAMBANK
~ GROWN TREES MATH A SHARP UTILITY STREAN STREAMBANK • • • • ~ '
~ KNIFE. MAKE 4 VERTICAL SLICES ON THE
~ SIDES AND AN "X" ON THE BOTTOM. ALL ~ SLICES SHOUDL BE 1 INCH IN DEPTH ~N . .
' ` ' ' ••i ~ • NT STAKES FROM • , • , , , . PLA
~ 4" OF MULCH © ® ~ ~ ' ~ : TOP OF BANK TO TOE OF BANK
~ MINIMUM OF 2 • 1, ~ • 1 ~ ~ . • .y.
z FROM TRUNK 1. .1 . •
~o WATER ~ '.I; NOTES:
TOE OF S TOE OF SLOPE , 1. STAKES SHOULD BE CUT AND INSTALLED ON THE SAME DAY.
T LL TAKES THAT HAVE BEEN SPLIT. 2. DO NOT INS A S
THE REMAINING 1I4 OF THE HOLE ~ FILL UNLESS SOIL IS POORLY DRAINED, 3. STAKES MUST BE INSTALLED WITH BUDS POINTING UPWARDS. 4. STAKES SHOULD BE INSTALLED PERPENDICULAR TO BANK.
v~ UNTH WATER TO REMOVE AIR POCKETS AND MOUND SOIL AROUND EDGES OF HOLE 4" 5. STAKES SHOULD BE 112 TO 21NCHES IN DIAMETER AND 1$" TO 30" LONG.
c ~ SETTLE THE SOIL. FINISH FILLING THE HOLE TO 6"HIGH. ADD A MINIMUM OF 4" OF AKING SPECIFICATION 6. STAKES SHOULD BE INSTALLED LEAVING 115 OF STAKE ABOVE GROUND. PLAN VIEW OF LIVE ST
~ WITH SOIL AFTER ALL THE WATER HAS DRAINED APPROVED MULCHING MATERIAL. KEEP
~ MULCH ABOUT 2" FROM THE TRUNK

BUCK PROJECT REFERENCE N0. SHEET N0.
M .'j, ~ 01388 Rf-2
e r ...jr , ~ W f \ I
f . PROJECT ENGINEER
~ \ 1 \ \ ~ s
E 11 ~ ~L
} r r \ 'i , I \ \ < < ~ .S t
, ~ ~ , i
_ _ ~ 1, t ~ 1 l \ \ PRELIMINARY PLANS . I ~ -
i ~ S \ ~ ~ ti ~ ~ A „ DO NOT U8B FOR CONSTRUCTION j 1
S ~ ~ ~ 1. 1. ~ ~ V A ~ i ~ ,
~ _ ~ ~;:3;,ti~ \
\ i i i I ~ ~ ~ ` J \
~ ` ~ i `r r ~ \ )
\ 1, i ~ \ \ '1 1
~ ~ ~ ~ ~ i 5 t ~ ~ S `t r r i "
~ s„,r ` 1 \ 1' j' ,i ` r~ ~ Ott
' \ ~ " ' 8000 Re enc Parkwa Suite 200 " Q Ca 9N h y r ~ ry, ort Carohna 27511
' ~ / ~ \ s.< CT ~ Phone: [phone] ~,,.r'.F~"""~~"''-~'~"-'".~:.~°,a ~ »a"4 ,w W B'iNQ•INa'H~iBING Fax: [phone]
l it E ! ! j , \ " F, r ,
1 ! F J„f t .J r / . , _
,s;> _ , , U PHASE BEGINNING STATION ENDING STATION ~ ~~i , 10+00 13+
1 i ~ i ~ 1
! , .~it r e ~ 'a 1~ f ! cry r T r s ~ sl a.~ ~ ~ ~ 2 13+00 16+00 Q ~ ~ 3 16+00 16+50
~ f ~ ~r 1 w 4 18+50 21+00
! r ! i ,r i 1 ~ / ! ~ . ' ~ gyp( ,r~~ ~ \ ~ ~ : ~ O 5 21+00 23+50 x
f,":: G" r 3 ! r / • ~ 6 23+50 26+50 ~ ' i~
a 1 ~ ~ ` c O 7 REACH TO RECEIVE TWO STRUCTURES _ ~ ` ~ ~ ` N 8 ENHANCED WETLAND
~ ~ RY \ ~ ~ ti ~ \ \ S. _ Z
; 30 W10~ ~ . ~ 's
i , ~ , ` i>{;~ r, ~ ~ , \ k , ~ ~ ti ~
~ ~ ~ ~ r- , Q ,yin, TYPE I, TYPE II, AND ~
F- ;,:,:3a .,,,~~.r~ ~ LIVE STAKING REF R ATI ~ ~ ~ ~,~~n.:~ 0 EST ON
\ N ~ ` 4 ` ,~i TYPE III AND TYPE IV
; ` i WETLAND REFORESTATION
x~ ~ ~ ' ~ ~ y,,.~ ' 1 i
~ ~ I \ ~ ~ ~ ~ i
w ~ y ~ ~ ~ ~ ti 1 ~ t, %
\ \ ~ ~ \ ~t f
`ti ! 7 ,y1 r~ ( ~ \ ` ` i 1 t
i \ i a
lll.~, r~ ! ? E \ \ ~ ~ \ ` . ,
}
till ` ' \ ! ! \ , \ 5
al;1• I ! \ ! J \ ilk! t ; ! ! \ r, i y ~ 9
Iliii' ! 1 ! r/ 1\ li4i~ ; \.r' ! it / \ 0 ~ ,
ky1~ i f.'' ~ ~ ~ 1
Ngl~ ! j v i1$il 1 \ \ ~ \ ~
X31' I ! I I \ \ ~ ~ \ ~ ~ \ \
~tll i ! 7w{1, 1 / 1 \ ~ ~ NOTES:
y~l~ n ~ i ~ ~ \ , ' ~ 1. TEMPORARY CONSTRUCTION ENTRANCE OFF-SITE
_ 1 T \ ' ` ~ \ i ~ f )SHALL \ \ 's ~ f BE BUILT AND MAINTAINED BY OTHERS.
111 _y.. h / • Mil `1 ~1 ~ ~ s 2. FOR PLANT SPECIES, LIST, AND DISTRIBUTION
REFER TO SHEET R -1. F
~ r - ,
' ' "
\ /n ~ ~r / ~ / /
i I ~ r/ ~ r/
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U' _ r ~1 i 1 ~ ~ ! i' ' ~ ! ,,~I ~ ~ ~ + \ i y
t i f REFORESTATION /VEGETATION
• ~ PLANTING PLAN
_ ~ l I f
(n4{} / ! / r f tlt~' 5:1F1 I 2 50 5 0 50 100
r
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SCALE
N

ersls IIIQC[ PAW~t7P Rttr~xcs xA sir mr,~. xa tl~ra
$ .
~ - ~ 4
,~,y r ~ PROJECT SITE ~
~5 ~ Grp 5C0 ~4~, Cemetery Rd. ~
1o v
~ ~ ~
~ ~
o~ a m ~ o
~.s\ Futch Leek I T i~ ~
F`Q, ~7 ~

G O
y ~ • o~ ~ oec° ~
~ 3
C ° G 2.p~ ~ ~s. B
lend \ y ~ arm 'r. ~ yr F
a o I pr. 70,x, •.e Q~
_ Q 1, Abbey Glen W~ay R r pp.~y to Po d Re. q ce e ~ 7 ti 3. Pilrke~on Br. ~ u
o . 5. In~erlad en Cifn J S
Ra 6. Butler National Ln. 5 7. Calla~xass~e Island Dr.
S 6. Congressional ln. O o~cQ ~ 6 Cir.
ea~ej
~ ~e~r
a _.w._..,y..,. w r u ~P .o.....~ . N~ µ ,r> ~
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.v._ ~ , ..r.._._....

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't s ~ r` ~ v',p' ~ E ~ I ``~.a ~efS ~ urN r~ ~ w. ,w.n4w ~n
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~ ~ ~ ~ ~ I ~ M.,~V ~
~~r~ S~ ~t r ~ `v I r" ~1,~" w \ \ Tom.. • ~ WE'fIANO ENMM1NCEMENT H• 2 ACHES ~
~y~
~ ~ , ~
CHANNEL STATION 10+00.00 ~ I -
~ ~ ~ , I ~ E ! BEGIN CONSTRUCTION ~ ~ ~ ~ .
i ~~t
4 i/ / t~~ s r I ~ _ ~ /G% / ~ I
' _ ~ ~ a ~ I I ~ ~ ~ ~ ~
l / / } ~ ~ I
i I ` I ~ \ ~ / ~l) / f
E p ~ ~ ~~i M I ~ 1 ~l I / t
~ ~ ~ CHANNEL STATION 26+45.77 I II'j
II END CONSTRUCTION I 11
~ ~ I 03 I I - ~ , II ,
DCT :.~r~ I I 5 I r~~~ ~~4 ~~r _ I ~ ~ M
~ ~ ~ ~ I r
. ~ y~',~~ ~ t ,
~ m .o,rca .u_s wr`" ""y ..a., nom,.., ..m- w•"~ ~U""is.+"~ rCd`r`>'r8it„ ~Iiri ~ ` „ ;'4 "s''I t11?f'~ k i P V ~ ,.o^ ~ t ~ 1 U.. f ,
(
;gym' ~ I ' ( i _ ; a 1` I I 11 J ~
!i r } 4 r i 5 i 1 ~ Y t i L I I SHEET 4 I , SHEET 5
~ l t
t b 1 ps 3
{ i s
RO ECT XI TING STREAM DATA P E S LES CA IC S GRAPH PREPARED IN THE OFFICE OF: P ECT LENGTH RO ECT EN INE ?0 G ER
8000 Regency Parkway Suite 200
EXISTING STREAM TYPE G5c Cary, North Carolina 27511
TREAM LENGTH EXISTING S 25 0 50 100 EXISTING REACH LENGTH 1646 GTH = Phone:919.463~5488 LEN 1646 FEET ~~-~~~~~a~ttz~~ Fax: [phone]
50 WETLAND ENHANCEMENT AI MENT AREA = 2.0 ACRES
BANKFULL XSEC AREA 8.9
PLANS
BANKFULL WIDTH 8.2 PRELIMINARY PLANS
DOUG J. SMITH 1D0 NOT UBB FOR CON9TRUC'Tl[ON
50 25 0 50 100 WiD RATIO 7.5 PROJECT MANAGER
BANKFULL MAX DEPTH 2.3
LETTING DATE:
PROFILE HORIZONTAL BANK HEIGHT RATIO 4.1 KEVIN 1. TWEEDY PE
PROJECT DESIGN ENGINEER
5 0 5 10 ENTRENCHMENT RATIO 1.2 CHRIS O'KEEFE
NTACT.• C
SLOPE 0.013 ~w 11~R' IIANOVER COUNTY PROJECT COORDINATOR P.E. SIGNATURE:
PROFILE ERTICAL

BUCK PROJECT REFERENCE N0. SHEET N0.
13B 2
PROJECT ENGINEER
l~~J~][~. ~~CIEgIE~I~I[ ~~NV]EI~T~~~NA1[, ~~lvg]~~lL~
N.C. EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL
THALWEG SILT CHECK PRELIMINARY PLANS
DECEMBER 1993 UO NOT USB FOR CONSTRUCTION
TOP OF BANK
I f--I I H I I- SILT FENCE DOUBLE DROP ROCK CROSS VANE 6.06.01 TEMPORARY GRAVEL CONSTRUCTION ENTRANCEIEXIT
-------n.------- WETLAND BOUNDRY 6.60 TEMPORARY SEDIMENT TRAP
6.62 SEDIMENT FENCE
STEP POOL
6.70.01 TEMPORARY STREAM CROSSING
8000 Regency Parkway Suite 200 Cary, North Carolina 27511
d TEMP. SEDIMENT TRAP Phone: [phone]
ENGINEERING Fax: [phone]
1. The prep 6.06. 1. The Contractor will use the existin construction access, if available. If a stabilized construction entrance is not available the contractor shall 9 ,
prepare onein accordancewith NC Erosion and Sediment Control Plannin and Deli n Manual: Tem orar Gravel Construction EntrancelExit:
9 9 p Y
6.06.1
2. The 2. The Contractor shall prepare the stagin areas} and stockpile area(s) as shown in the laps. If necessar ,erect an safet fences silt fences or 9 p Y Y Y ,
barri 3. The 1 TITLE SHEET 4. The 2 BUCK STREAM CONVENTIONAL SYMBOLS witn barriers. Stockpi I e m ateri al s that wi I I be needed duri ng the i ni ti al stages of construction.
3. The Contractor shall install a temporar sediment tr at the downstream most location as identified on the tans. Y aP p
4. The Contractor will use the existin stream crossin , if available. If a stream crossin is not available, the contractor shall re are ane in accordance 9 9 9 Pp
with NC Erosion and Sediment Control Plannin and Desi n Manual: Tem orar Stream Crossin :6.70.1 9 9 p Y 9
INDEX OF SHEETS 5. The SUMMARY OF QUANTITIES arei STANDARD SPECIFICATIONS thro EARTHWORK SUMMARY 6. The 5. The Contractor shall install temporar coffer dams and pum around o erations for Phase 1 at locations ecified on the tans. Limits of each hase Y p p sp p p
are identified on the erosion control measures plan sheets.] The ortion of the channel isolated shall be dewatered and the removed water shall flow
p
throu h a eci al sti I I i ng basi n accordi n to proj ect sp~i al provisions. 9 sp g
i v tr k. x 6. The Contractor shall beg n exca anon of the s eam ban E cavation shall b in on the u stream end and work downstream. ~J p
CONSTRUCTION SEQUENCE 7. onc 3 TYPICAL SECTIONS of tn STRUCTURE DETAILS s. the 7. Once a secti on of bank has been excavated to desi n rades, i nstream structures, math n and l ants shat I be i nstal l ed i n that section er the di recd on 99 9 P p
of the En ineer/Pro~ect M anager and the channel made ready to accept flow. g 1
8. The Contractor shall remove the downstream coffer dam, then the u stream coffer dam, and final) the um around o eration thereb ~lowin
p Y p p p Y 9
w~e 4 TO 5 PLAN/PROFILE VIEW OF EXISTING STREAM 9. Onc CONDITIONS AND PROPOSED STREAM DESIGN the EC-1 EROSION CONTROL DETAILS 10. The EROSION AND SEDIMENT CONTROL MEASURES degr EG2 EROSION CONTROL PLAN VIEW RF-1 VEGETATION SELECTION 11.Onc PLANTING SPECS dist RF-2 REFORESTATION PLAN VIEW fol lo Gale 12. The water to flow into the completed portion of the channel.
9. Once a section of new channel is completed and water routed in, the Contractor ma b in construction of the next section Phases 2 throu h 7 of g } Y ~J
the chann~ b i nni n a ai n at Step 4. e5 9 9
10. The wetland enhancement area will be planted according to plan in the eighth and final Phase of the ro~ect. D endin u on site conditions and the p1 ep gp
degree of existing disturbance, some minor earthwork may be proposed for the enhanced area. S ecificall , existin oil files andlor berms ma be p Y 9sP p Y
resh ed to rovide a more natural topo r hand flow r ime throu h the enhanced wetland area. ap p g ap Y e9 g
11.Once a stream or wetland work Phase is complete the Contractor will Item orar seedin , ermanent seedin and mulch to an other areas apP Y p Y 9 p 9. Y
disturbed durin construction. Permanent seeding mixtures shall be plied as shown on the v etation Ian. Tem orar seedin shall be lied in
9 ~ p p Y 9 apP
all areas susceptible to erosion (i.e. disturbed ditch banks, steep slopes, and oi{ areas such that round cover is established within 30 workin da s ~ ) 9 9 Y
followin com letion of an hale of radin .Permanent round cover shall be established for all disturbed areas within 30 workin da s or 120 9 P Yp g 9 g g y
calendar days (whichever is shorter) following completion of construction.
12. The Contractor will install the interpretive sign ~ a location identified b the Pro'ect En ineer/Man er. The si n will be rovided to the contractor Y 1 9 ~J 9 p
by th by the cl i est.
13. The Item D escription Quantity Unit n r r insure that h i i free of trash n l f v r m 13. The Co t acto shall testes a d e to a aterials poor to demobilization of ui ment from the site. eq p
PHASE BEGINNING STATION ENDING STATION
1 10+00 + 13 00
2 13+00 16+00
3 16+00 18+50
4 18+50 21+00
5 21+00 23+50
C Mobilization/Demobilization 1 L S 6 23+50 26+50
E 1 Temp Silt Fence 400 L F
7 REACH TO RECEIVE TWO STRUCTURES
E2 Filter Fabric, Type 2 N on-W oven 750 SY
E3 Special Stilling Basin 8 EA $ ENHANCED WETLAND
E4 Diversion Pum p and System 1 L S
F1 Temp Seeding (Rye Grain) 280 LBS
F2 Seeding and Mulching 2.15 ACRES
G Coconut (Coir) Fiber Matting 10,500 SY (IN CUBIC A Y D~ 5
H 1 Excavation, Fill, Grading 1 LS
H 2 Site Preparation 1 L S CUT
11 Stone Boulders (4' x 3' x 2') 440 TONS ii 12 Class 1 Stone, Plain Rip-rap 80 TONS TOTAL
LINE STATION TO STATION TOTAL FILL + % BORROW UNDERCUT WASTE
UNCLASS.
13 Class A Stone, Plain Rip-rap 45 TONS FLITCH FLITCH CREEK 10+25.00 26+28.76 2281 0 0 2281
14 Class B Stone, Plain Rip-rap 12 TONS
15 #57 Stone 100 TONS
J1 Tree and Shrub Plantings 1450 EA C H
J2 Wetland V egetation Plantings 525 EA C H TOTAL 2281 0 0 22 1 8
K Live Staking 1200 EA C H
L Interpretive Sign Installation 1 LS SAY 2300 0 0 23 00
GRAND TOTAL
0

BUCK PROJECT REFERENCE N0. SHEET N0.
138 3
PROJECT ENGINEER
E I N I
PRELIMINARY PLANS
TOP OF BANK DO NOT USB FOR CONSTRUCTION
DO NOT EXCAVATE RIGHT BANK CLASS 1 STONE, a PLAIN RIP RAP
HEADER
ROCK FLOW ? ~
0
1 / EXISTING GROUND
EXISTING GROUND 8000 Regency Parkway Suite 200
Cary, North Carolina 27511
T R ~ Phone: [phone] F00 ER OCK ENaINRERINa Fax: [phone]
2'
CLASS A STONE, FILTER FABRIC, TYPE 2
PLAIN RIP RAP
_ _ SECTION WIO BANKFULL BENCH
FLOW
PROFILE VIEW
TOP OF BANK DO NOT EXCAVATE RIGHT BANK ~ ~ CLASS 1 STONE,
PLAIN RIP RAP

~ ~
EX TING GROUND qRl VARIES IS FS
EXISTING GROUND ~rQ 2 COIR FIBER MATTING
3• ~1 / 1
/ 1 z•
~ ~
i FILTER FABRIC,
2' TYPE 2
SECTION WITH BANKFULL BENCH
i ~ r r
NOTE:
DURING CONSTRUCTION, CORNERS OF DESIGN CHANNEL WILL BE ROUNDED AND A THALWEG WILL BE SHAPED PER DIRECTION OF ENGINEER.
CROSS SECTION
PLAN VIEW
D BLE R P RO K R V OU D 0 C C OSS
113 113 113
BOTTOM BOTTOM BOTTOM
WIDTH OF WIDTH OF WIDTH OF CHANNEL CHANNEL CHANNEL
FLOW VARIES
20° TO 25°
112 TO 213 BANKFULL #57 STONE 1' STONE BOULDER, HEADER ROCK
STONE BOULDER, ENE BOULDER, HEADER ROCK 1'
A STREAMBED
r__` WATER FLOW 4% T010°k SLOPE BACKFILL WITH ON•SITE ALLUVIUM
r ~ _ 5TREAMBED ~~,1.
1 f11 M1NbIN7i.fM .f c~ r A ~ Q ELEVATION ; r l;, ~
mH ~ MH
a N ~ ~ a N BACKFILL WITH ON-SITE ALLUVIUM 0 ~ ~ BACKWATER ; ~ ~ NE STONE BOULDER, FOOTER ROCK
~ ~ r ` POOL ~ ~ #57 STO POOLS EXCAVATED PER FILTER FABRIC, TYPE 2 1'
Y l ~ ~ ~ 1 ~ Y CLASS 11A STONE MIXTURE, PLAIN RIP RAP P001 z ~ ~ `i z DIRE DIRECTION OF ENGINEER 1_Z~ CLASS 1W STONE MIXTURE, PLAIN RIP RAP
Q Q m m FILTER FABRIC, TYPE 2
~ ~ 6' MINIMUM
~ r ~ ; STONE BOULDER, FOOTER ROCK
` ~ PROFILE VIEW SECTION A - A'
~ ~
~ ` , r ~ _ ~ ~
I ~ ~ ~ 6'-8'
i
~ ~ SCOUR r
~ POOL ~ ~ - tiJ ~ ti
NO GAPS
BETWEEN FLOODPLAIN SILL NOTES FOR ALL VANE STRUCTURES:
BOULDERS
t , 1. BOULDERS MUST BE AT LEAST 4' x 3' x 2'.
~ ' POOLS EXCAVATED PER { • DIRECTION OF ENGINEER 2. INSTALL FILTER FABRIC, TYPE 2 FOR DRAINAGE BEGINNING AT THE MIDDLE OF THE HEADER ROCKS AND EXTEND DOWNWARD TO THE DEPTH OF THE BOTTOM FOOTER ROCK, AND THEN UPSTREAM
TO A MINIMUM OF SIX FEET.
3. DIG A TRENCH BELOW THE BED FOR FOOTER ROCKS AND PLACE FILL ON
c,, UPSTREAM SIDE OF VANE ARM, BETWEEN THE ARM AND STREAM BANK.
- N VIEW PLA 4. START AT BANKFULL AND PLACE FOOTER ROCKS FIRST AND THEN HEADER (TOR) ROCK.
5. CONTINUE WITH STRUCTURE, FOLLOWING ANGLE AND SLOPE SPECIFICATIONS.
6, USE PLAIN RIP RAP, CLASS 11A STONE MIXTURE, PLAIN RIP RAP TO FILL GAPS ON UPSTREAM SIDE
OF BOULDERS, AND #57 STONE TO FILL GAPS ON UPSTREAM SIDE OF CLASS 11A STONE MIXTURE, PLAIN RIP RAP.
7. AFTER ALL STONE HAS BEEN PLACED, FILL IN THE UPSTREAM SIDE OF THE
STRUCTURE WITH COMPACTED ON-SITE ALLUVIUM OR #57 STONE TO THE ELEVATION OF THE TOP OF THE HEADER ROCK.

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+ 0 0 25 24 00 + 0 3 s , + 00 2 00 2

BUCK PROJER REFERENCE NO. SHEET NO.
O138R EC-l
,'J PROTECT ENGINEER
D P
PRELIMINARY PLANS
DO NOT II8B FOR CONe'RIUCTTON
COCONUT (COIR) FIBER MATTING
SPECIAL STILLING BASIN PLACE COIR FIBER MATTINCa IN 61NCH DEEP ryOTES:
(SEE PROJECT SPECIAL PROVISIONS) TRENCH, STAKE, BACKFILL, AND COMPACT ~ U C K aooo Regency parkway sui~a 200 1. BANKS SHOULD BE SEEDED PRIOR TO cery, Nonn caroiine z~sti
RIP RAP OUTLET TO DISSIPATE ENERGY. PLACEMENT OF MATTING. ~ Phone: [phone] TOP OF STREAMBANK 2. PLACE COIR FIBER MATTING ACCORDING TO ~N6INEER2N6 Fax: [phone]
METHOD AND ROCK MANUFACTURER RECOMMENDATIONS.
SIZE TO BE DETERMINED IN THE FIELD TO ADDRESS 3. MATTING STAKES SHOULD BE PLACED IN A DIAMOND SHAPED PATTERN.
SITE CONDITIONS
DEWATERING PUMP
TOE OF SLOPE
80TTOM OF CHANNEL
IMPERVIOUS DIKE
(SEE PROJECT SPECIAL PROVISIONS)
TEMPORARY FLEXIBLE PLACE COIR FIBER MATTING IN 61NCH DEEP
HOSE TRENCH, STAKE, BACKFILL, AND COMPACT
CROSS SECTION VIEW
EXISTING CHANNEL
TRENCH TRENCH
T TRENC D ~0
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ TOP OF STREAMBANK
TOP OF- STREAMB S7REAMBANK ~ ~ ~ ~ ~ STAKES
TEMPORARY FLEXIBLE HOSE • • 1 1 t • 1 1 • 1 • •
t • • • • t • • • • •
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ COIR FIBER MATTING
• , • • • • • • ' ~ , • TO BE FJCTENDED TO
TOE OF BANK
t • 1 1 • • 1 1 1 1 1 •
PLAN VIEW
IMPERVIOU5 DIKE
(SEE PROJECT SPECIAL PROVISIONS)
2" F•-
PUMP-AROUND PUMP Q~.y
RIP RAP INLET TO STABILIZE.
METHOD AND ROCK SIZE TO N
BE DETERMINED IN THE FIELD TO ADDRESS SITE CONDITIONS
TYPICAL MATTING STAKE
SEQUENCE OF CONSTRUCTION FOR TYPICAL PUMP AROUND
ECIAL STILLING BASIN AT THE DOWNSTREAM SPECIAL STIWNG BASIN 1. INSTALL SP
END OF THE DESIGNATED PROJECT WORKING AREA.
- 2. THE CONTRACTOR WILL INSTALL THE PUMP AROUND PUMP AND THE TEMPORARY FLEXIBLE EROSION AND SEDIMENT CONTROL MEASURES
HOSE THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE
WORK SITE TO THE RIP RAPPED OUTLET TO DISSIPATE ENERGY. EXISTING GROUND GRADING ACTIVITIES IN THE CHANNEL WILL BE PERFORMED IN THE DRY. TEMPORARY
3. INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN IMPERIOUS DIKES WILL BE CONSTRUCTED UPSTREAM AND DOWNSTREAM
PUMPING OPERATIONS FOR STREAM DIVERSION.
4. INSTALL THE DOWNSTREAM IMPERVIOUS DIKE. INSTALL PUMPING APPARATUS IF NEEDED OF THE PORTION OF CHANNEL THAT WILL BE UNDERGOING CONSTRUCTION. THE STREAM FLOW
TO DEWATER THE ENTRAPPED AREA. THE PUMP AND HOSE FOR THIS PURPOSE
SHALL BE OF SUFFICIENT SIZE TO DEWATER THE WORK AREA. FILTER FABRIC, - LOW INTO A SPECIAL STILLING BASIN. TYPE 2 _ THIS WATER WILL ALSO F 15 20 FT WILL BE PUMPED AROUND. WORK SHALL BE COMPLETED IN PHASES AS IDENTIFIED IN
5. THE CONTRACTOR WILL PERFORM STREAM RESTORATION WORK IN ACCORDANCE WITH THE PLAN THE CONSTRUCTION SEQUENCE. THE PUMP SHOULD ADEQUATELY CONVEY
L CONSTRUCTION SEQUENCE. (SEE SHEET 2) AND FOLLOWING THE GENERA
6. THE CONTRACTOR WILL EXCAVATE ANY ACCUMULATED SILT AND DEWATER BEFORE BASE FLOW (2.5 MAX CFS). THE TEMPORARY IMPERIOUS DIKES WILL BE REMOVED WHEN
VE IMPERVIOUS DIKES PUMPS, AND REMOVAL OF THE IMPERVIOUS DIKE. REMO THE CONSTRUCTION OF EACH WORKING AREA IS COMPLETE. COCONUT (COIR) FIBER MATTING
STARTING WITH THE DOWNSTREAM DIKE FIRST. TEMPORARY FLEXIBLE HOSE
7. THE CONTRACTOR WILL COMPLETE ALL GRADING AND STABILIZATION IN ONE DAY WILL BE PLACED ON ALL DISTURBED BANKS.
EA BETWEEN THE IMPERVIOUS DIKES. WITHIN THE PUMP AROUND AR
" PLETED REMOVE THE STILLING BASINS r. 8.ONCE THE WORKING AREA IS COM ,
` AND STABILIZE DISTURBED AREAS WITH SEED AND MULCH. a.: EXCAVATED MATERIAL WILL BE TEMPORARILY STOCKPILED AS SHOWN ON THE PLANS. SILT
i~, FENCES WILL BE USED TO PREVENT SEDIMENT MIGRATION TOWARD
THE OPEN CHANNELS ON SITE.
;t,;

BUCK PR0IECT REFERENCE N0. SHEET N0.
0138R EC 2
~ ~ f ~ / i ~1'I PROTECT ENGINEER
I / i 1 ' ,r f 1
1 l / / ~ , ~ 1
11 ~ _ 1 / ~ 1
~ 1 ~ .r i / ~ ~ 1 ` ' 1 / ~ ' , r
~ 1 1 ~ ~ STAGING AND s ~ / / ~ ~ SING AND ~ ~ ~ ~ ~ - ~ ~ , w,~
s ~ / %'i- STOC ILE AREA 11 / /s, _.1 (?ILE AREA ; - ~ PRELIMINARY PLANS i
' ? i ~ FOR PHASES 1-3 PHASES 1-3 ` ; ? ' - • DO NOT USB FOR CONBTRUCTION t c t 1.~ PHASE 3 250
1`', / ~ ~1 / / , 1 1 %t' ~ ~ PROPO ED PROPO ED ~ , ~ ~ , ~ 16+00 TO 18+50 ' ~
w , ~ / AN - ~ ~ ~ / FIRE HYQR FIRE HYDRANT .1 ~ ~._.M .
~ i i M ~ ~ \ ~ / , , S
v m ~ ~ i z N w,.>,~;~ , w > P f ~ , i INE (N 1
~ W i 1 i / ~UT ~ ~ ,
_ ~ j , PHASE. 2 - 300 ~ ~ 5 ~ ' "'"=;1 ~~D ~ 8000 Re enc Parkwa Suite 200 9 ~ ~ ~ . _ _ 9 Y Y 1..,
~ 13+00 TQ 16+00 - f ~ f ~ . - ; ~ ~ Q Cary, North Carolina 27511 ' r ` ~ Phone: [phone]
i ~ ; ~ ~ ' ~ S W G NSERING ~ Fax: [phone] ~ - ~ s EN I
t; l f r , ~ f
PHASE 1 = 300' ` ~ ` ~ ' ! r / . '
/ 10+00 TO 13+00 i " f .~~,"'v'', •~u~' ,V~.~ ..~~'~.ti ~
/ ~ ~i
~ i r ray ~ S REA CR r
AlL DISTURBED BANKS° ' ~ - , 'I. ~ \ ~'\r.' IN TALLED`BY~,OTHER\ PERMITTED AND S S ~ , _ n~~} O
TR TED ^ T - WILL BE WI H t' ~ ,
105.00 r~ COIR FIBER MATTING ~ f`~ ~.~f: ~ ~_4~ a,.,.
I ~ ~ ~ N
1 ~ Z
. m ~ _
I ~ - F-
Q t F.. I `;r'"
~ fA I, ,
1 ti ~ , ~ ,
CUT LIN (TY~ ~ ~ ~ _ . r 9 0
~ ~ r ~ ~ 'l / ~ ~ 1
~ _ i~ f~ ~ .
r lye. ~fA~'~?~2;"X4~;'1,~~~ , ry..- I~
~ ` , I~ ,t
~ ~ ` ~ i ,r I
1~ ;r'' a ~ ~ ' ~ ~ f1, i
% ! ~ ~ ~ l \ y
~~j f' ~ ~ 1 , NOTES:
TEMPORARY GRAVEL CONSTRUCTION ENTRANCE AND
!i; f f r ~ ~ TEMPORARY STREAM CROSSING SHALL BE PERMITTED
it l,tii ~ ~ 1 / ' F ~rfl ~ \ ,J f~fi -.f ~ ~ UNDER THE SAGEWOOD PROJECT BY
NEW HANOVER COUNTY. ~ ~ PERMIT NUMBER: GP 2303
M f~ ~ i N r"f1 ~ 1 ii ~ 1
0 fV7 i I~~_ ' ~ TEMPORARY GRAVEL CONSTRUCTION ENTRANCE
~ _ Hh4- I~~ ~ 1 ~ \ EjRE-IzR ' (OFFSITE) AND TEMPORARY STREAM CROSSING SHALL I ~ --~---L BE INSTALLED AND MAINTAINED BY SITE DEVELOPER.
GREEN ~ - , - - - ~ U E--~-F
r ^w` - " ~ AREA LOCATED ON LOT56. REFER TO ~ ~,,.cw- . _ , , _ _._.,_..:r._~~- _ _ _ SOIL STOCKPILE
- - X ' I ~ - - - -w- SITE DEVELOPMENT PLAN. APPROXIMATELY 300 FEET i
ri FROM CHANNEL.
r ~ r -
_ _ ice/ ~ ~ ,
1 ~ i I ,f ~ ~ ,
' ~ 1 i
t ~ ~ / ~ ~ --~-1~ i , - - E ter,,.::- , % ~ . ~g1M
1 t t _ ~ i f.'~J r ~ ! (r . nod ~ ~ ~ ,0j~
~ .T ~ . f ~ ~ ~ ~ _ ~ • - , , . _ ~ 6T, ..ur J,
PHASE 4 ?,50- , , r' ( ;
i ~ ~ f, r~r "i~1
- - i i~ 'r: r' ~ ,~`r;~; ' t / ~ Jfs ~ ~ , /
- . STAGIN AND , / / ~ / i ~ i + ~ /
STOCKPI AREAS ' EMENT +l- 2 ACRES ~ , , ' . ~ ; ,ILAtyD "ENHANC ,
_ FOR P SE:S~ 4-6 , ~ _ _ : . _ _ - . _ E 6 , _ _ _ - / / \ ~ '~ri y'~ 1 ~ ' /
--0t/ _ - ~ ~ ~ Q_.. - - ~ s~ 9~ ,
_ .ry _ F ~ PHASE 5-20' / , _ _M _ ~ .r. ~ „~p ~r,~. ynk'
- . 3 ~ +00 TO 23+ 0 ALL DISTUREIE:U`EI,ANKS _ _ _ - _ / Ow ~ ~ _ fit" Y ~ „rf.; ~ • . r ! r ~ ~ ~i ~s ~
S ~f WILL BE•'TREA7~ED,IN~ITH _ _ = ~ ,FWD Sq I ~ . _ - - ~ _ Q ~ ~~T _ co E R F - I- IR FIBER MARTIN j ! ~ ~ ~ ~ •Yvy. O k~..- _ _
. ~ - . _ _ • ~ ~ UA. i ~ ,
~ .a ~ _ i"", r ~ ,
. ti ti , 5 3 ~i r ~ j • ~ , _ r _ , _
~ ' 'i ''t - \ ~ t ~ ,d ~ ~ 1
~ ~ !
_ ~ ; m ~ ~
'w- / i~~~ ' c' ~:r~
- ' - rfl ~ - . ~ / ,
l ' ~ ~ , ~ , ~ J
~ : ~ - ~'~i;l~ I i ~ / .
~ ~ i
0 - - _ . _ l~,i(; ~ I ~ , i
f ~ j, J'~ f 1 iff,'j ~ l ~ ~ _
Q ~ ' ~ _ _ ~ 1 _ - _ , L - l'~ , ~ rl ~P~pt m i I , ~ ~ C"'
r:~ °ti 'i ~r ~~~r t Ii.' S S
t`' w.,,., ~ ' `r~~ ~i ?art ) r. r 1 ~ ~ ~
` ~ ~ L. ~ ~ r, ~ ~ 1
1,1.f ;',n1r~ ~ ~`l V . ~ , ^T`+~~ ~ A-~' ~ - ~ ~ F,f Siff ~ ~ ~ i i pp ~ ~;ir ~;f 1 ~ \
r.a ~~1 rii ,f „T . ~ ~V ! y!.i r+ilr j i r v{~ ~ i i~
..i, i ' j ~l
1 f i`
r , . ~ i _ ~ A\ '~,~r ,i its, ( ~y, i ~ ~ / ~ ~ \
'V t A V gill ~ f ~ i.,, / ",1 r i 1 7,,,,~ a ,f 1 E ~
r ~ r ;,,!fl 1 PHASE ~ r PHgS
- ` ~ ~ ~ ~ ` ''f` ~ ~ TO E-L'OCATEC ! ~ _ i` ~ ~ ~i~ t E IN THE FIELD E-LOCATED ION CONTROL EROS ~ ,
- ~ I tii'. ' ~ ~ --A~ PER DIRECT ~ ~ .1 , . PER DIRECTION OF PROJECT MEASURES
- ~ ff, ~ EN IGINEER.
i ~ t,li~` jfb ~ v
~ ~ ( ATE RIGH f iii ii zr~>r, t hff f?!ji J 1 i ~ ~ (CAVATE RIGHT BANK (AT 2:1) REACH. 50 25 0 50 100
r' " ~ ~ ~ ~ ~ `,....1 If I`'+'~ a f~:; ~ ALONG THIS RE r = - ~.t ~ ~ f' iiff~ ~ .ONG THIS
i , ~ !r ~...i ,~i~~l i'i'i ~'i ii i ~ t i ~ , ; - ~ ~ , t, ~ ~~r;- ~ ~,~,3 ~ - / ~ ~y ,
r r .i__,,._ , j ! ~ r\ itp ~ ~~'lf SCALE F
- , z... „ ~ ~ ~ ~ t t 3. I S ,
%sL

BUCK PROJECT REFERENCE NO. SHEET N0.
m 01388 RF-1
m TYPE 1 STREAMBANK REFORESTATION SHALL BE PLANTED 10 FT. ON CENTER, RANDOM PROJECT ENGINEER
N ~ SPACING, APPROXIMATELY 436 PLANTS PER ACRE.
N TYPE 2 STREAMBANK REFORESTATION SHALL BE PLANTED 10 FT. ON CENTER, RANDOM
SPACING APPROXIMATELY 436 PLANTS PER ACRE.
NOTE: TYPE 1 AND TYPE 2 STREAMBANK REFORESTATION SHALL BE
T PAID FOR AS'TREE AND SHRUB PLANTINGS" TYPE 4 SHALL BE PAID FOR AS "LIVE STAKING"
P PRELIMINARY PLANS
DO NOT USE FOR CONSTRUCTION
1. LOCATE A HEALING-IN SITE IN A SHADY, WELL PROTECTED AREA.
2. EXCAVATED A FLAT BOTTOM TRENCH
12 INCHES DEEP AND PROVIDE DRAINAGE. i i u
~ii u 8000 Regency Parkway Suite 200
2 inch n Cary, North Carolina 27511
n Phone: [phone] ENC3INEERINCi fax:[phone]
~i
i TYPE II AND _ SEED MIX TYPE II w c7
i o}d} z
i Z I- Y QX Q
W~ ~
aQ w ~w >
w ~ rn
1. INSERT PLANTING BAR 2. REMOVE PLANTING BAR 3. INSERT PLANTING BAR
AS SHAOWN AND PULL HANDLE AND PLACESEEDING AT 2 INCHES TOWARD PLANTER
TOWARD PLANTER. CORRECT DEPTH. FROM SEEDING.
3. BACKFILL THE TRENCH WITH 2 INCHES OF WELL
ROTTED SAWDUST. PLACE A 2 INCH LAYER OF WELL ROTTED SAWDUST AT A SLOPING ANGLE
ATONE END OF THE TRENCH.
4:
STREAM
SEE PLAN SHEETS RF 2 FOR AREAS TO BE PLANTED
' • • ' i • 5 . ,1 Temporary Seed Mix
Winter Rye (Fall-Winter), Brown-top Millet (Spring-Summer)
TOF TOP OF BENCH TO 1/2 SLOPE (TYPE I) ENHANCED WETLAND TREES AND SHRUBS (TYPE IV)
Con 4. PLACE A SINGLE LAYER OF PLANTS SWE Common Name Scientific Name Common Name Scientific Name Swamp Tupelo Nyssa bif/ora Swamp Tupelo Nyssa biflora
AGAINST THE SLOPING END SO THAT ove Overcup Oak Quercus lyrata Bald Cypress Taxodium distichum
THE ROOT COLLAR IS AT GROUND LEVEL. ~ / RivE SWE River Birch Betula nigra Carolina Ash Fraxinus caro/iniana Sweetbay Magnolia virginiana Parsley-leaf Hawthorne Crataegus marshallii
SWE Swamp Red Bay Pecs®a palustris Buttonbush Cephalanihus occidentalis
. t. 6. LEAVE COMPATION Iron 4 ' ' 4. PULL HANDLE OF BAR 5. PUSH HANDLE FORWARD Wax Myrtle Myrica cerifera RIPARIA ESEED MIX (BOTTOM OF CHANNEL TO Ironwood Carpinus carol~niana 1/2 SLOP
HOLE OPEN. WATER TOWARD PLANTER, FIRMING FIRMING SOILATTOP. THOROUGHLY. (SEED MI TYPE I) Common Name Scientific Name
r SOIL AT BOTTOM. ' TOF TOP OF BANK TO 1/2 SLOPE (TYPE II) Switch Grass Panicum virgatum
Con Virginia Wild Rye Elymus virginicus Common Name Scientific Name Fox Sedges Carex vulplnoidea
Sw~ Swamp Chestnut Oak Quercus michauxii
N NOTES. PLA NTI Lau Wai Laurel Oak Quercus laurifolia RIPARIAN SEED MIX (TOP OF BANK AND UPLAND) Water Oak Quercus nigra (Seed Mix Type II)
' SWE Sweetbay Magnolia virginiana Common Name Scientific Name
• Wa: Swamp Red Bay Persea palustris Big Bluestem Andropogon gerardii Wax Myrtle Myrica cerifera Little Bluestem Schizachyrium scoparium
' • : ' PLANTING BAG Indian Grass Sorghastrum nutans
• : DURING PLANTING, SEEDLINGS • ; • : , ~ : , ' SHALL BE KEPT IN A MOIST Switch Grass Panicum virgatum
CANVAS BAG OR SIMILAR we WETLAND VEGETATION PLANTING (TYPE III)
CONTAINER TO PREVENT THE Common Name Scientific Name
ROOT SYSTEMS FROM DRYING. con 5. PLACE A 2 INCH LAYER OF WEL ROTTED ~ ~ soft Soft Rush Juncus effusus Wool Grass Scirpus cyperinus
T OVER THE ROOTS MAINTAINING Woi SAWDUS KBC PLANTING BAR G re Green Arrow-arum Peltandra virginica
A SLOPING ANGLE. ~ / PLANTING BAR SHALL HAVE A Bro. Broadleaf Arrowhead Saggitaria latifofia ' Pickerelweed Pontederia cordata
BLADE WITH A TRIANGULAR PicN CROSS SECTION, AND SHALL Liza Lizard's Tail Saururus cernuus
BE 12 INCHES LONG, Tus li~~ Tussock Sedge Carex stricter
• , • . 4 INCHES WIDE AND .
• ' • 1 INCH THICK AT CENTER. uvi LIVE STAKING
ROOT PRUNING Co r Common Name Scientific Name
ALL SEEDLINGS SHALL BE ROOT silk T Silk , • PRUNED, IF NECESSARY, SO THA Silky Dogwood Corpus amomum Silky Willow Salix Sericea
' NO ROOTS EXTEND MORE THAN
. 10 INCHES BELOW THE
' ~ ROOT COLLAR.
,4. 1' • VE TAKI N LI
.1 TOP OF STREAMBANK
• SQUARE CUT TOP
6. REPEAT LAYERS OF PLANTS AND SAWDUST • • 2'-3' BETWEEN STAKES • BUDS FACING UPWARD
AS NECESSARY AND WATER THOROUGHLY. • • • 2'-3' BETWEEN STAKES
LIVE CUTTING ' TOE OF BANK MIN. 112" DIA
' 18" - 30" LENGTH
PLANTING PROCEDURE FOR
CONTAINER GROWN TREES AND SHRUBS • ~ • . BOTTOM OF CHANNEL
~ U2
1"DEEP "X" ON BOTTOM OF • ANGLE CUT 30 - 45 DEGREES
ROOT BALL 1"DEEP
~ VERTICAL SLICE CROSS-SECTION VIEW OF LIVE STAKING SPECIFICATION
LIVE STAKE DETAIL
~ CUT THE CIRCLING ROOTS OF CONTAINER REMOVE THE PLASTIC CONTAINER AND TOP OF TOP OF STREAMBANK
~ GROWN TREES WITH A SHARP UTILITY FILL THE HOLE 314 FULL OF TAMPED SOIL TOP OF ~ STREAMI? ~ KNIFE. MAKE 4 VERTICAL SLICES ON THE STREAMBANK
~ SIDES AND AN "X" ON THE BOTTOM. ALL
~ SLICES SHOUDL BE 1 INCH IN DEPTH ,ry
~ 4" OF MULCH
~ © 4 MINIMUM OF 2 • • . ~ • . ~ • ; , . .:1... : . ; ~ ; PLANT STAKES FROM + • TOP OF BANK TO TOE OF BANK
~ FROM TRUNK 1 1
1. 1. 1
~c WATER - _ . •1.~ , ~ i.. • 1.. . .•1. • NOTES:
TOE OF SL( TOE OF SLOPE .1. .1. .1. 1 1; 1; 1 1
1. STAKES SHOULD BE CUT AND INSTALLED ON THE SAME DAY. 2. DO NOT INSTALL STAKES THAT HAVE BEEN SPLIT.
~ FILL THE REMAINING 1I4 OF THE HOLE UNLESS SOIL IS POORLY DRAINED, 3. STAKES MUST BE INSTALLED 1MTH BUDS POINTING UPWARDS.
WITH WATER TO REMOVE AIR POCKETS AND 4. STAKES SHOULD BE INSTALLED PERPENDICULAR TO BANK,
v ~ LE MOUND SOIL AROUND EDGES OF HOLE 4" SETTLE THE SOIL. FINISH FILLING THE HO TO 6 HIGH. ADD A MINIMUM OF 4 OF ~ WITH SOIL AFTER ALL THE WATER HAS DRAINED 5. STAKES SHOULD BE 112 TO 2 INCHES IN DIAMETER AND 18" TO 30" LONG.
~»+ti APPROVED MULCHING MATERIAL. KEEP PLAN VIEW OF LIVE STAKING SPECIFICATION 6. STAKES SHOULD BE INSTALLED LEAVING 115 OF STAKE ABOVE GROUND.
~ MULCH ABOUT 2"FROM THE TRUNK

BUCK PROJECT REFERENCE N0. SHEET N0.
0138R RF 2
~ I v t S , ~ ' A ' PROJECT ENGINEER
~ i A ~ ~'a 1 \ \
\ ~ ~ v ~ _
~ ,
I 1 1 \ ~ ~ 1 t ~
; t .
1 i_..._. 1 ~ `i ' ~ ~ ~ PRELIMINARY PLANS ~ ~ ~ ~ ' ~ - DO NOT tTSB FOR CONBTRUCTiON
,1 I it 1 , ,1 ~ i ~ } , ~ ~ ,,~1 ~ r
l ~ ~ \ I ~ ~ \ \ I I I ~ ~ , r
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:1 \ { ! ~ , u Cary, North Carolina 27511 ~ , ~ ~ ~ \ ~ y , LV ~ Phone: [phone]
\ ~ } 1 ~I ~ \ t ; } aKS t r.;~ • F ~ "1rr s,;~~ ` , + ~ ~ ~ ENGINEEliING Fax: [phone]
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~ : ~ , a' ~ ~ ti F- •
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t ~ ~ ~,3 :~~r' f i~ I ; ~ 7 REACH TO RECEIVE TWO STRUCTURES
t { . N 8 ENHANCED WETLAND y ' t y ~
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CUT Li ~ (T`fP / ; I ~ / . ~ - ~ ~ WETLAND REFORESTATION S i. 1
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t xj1~ i j ~ ~ s~ NOTES:
r1! } / ~ti ~ 1, i 1. TEMPORARY CONSTRUCTION ENTRANCE (OFF-SITE) SHALL
917,' ~ - - t ~ BE BUILT AND MAINTAINED BY OTHERS.
91r( a / ~ ~i ~ ; ~ / 2. FOR PLANT SPECIES, LIST, AND DISTRIBUTION , ' REFER TO SHEET RF-1.
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~ CHANNEL STATION 10+00.00 r~ ~ ~ ~ } ~ /
TIN ~ ~ ~ 1 u `y BEGIN CONSTRUC 0 ~ ~ .r ~ , ~ g ~ ~ j / / / It k ~ i •i I ~ ~
~ ~ , 1 ~ ~ ~ i 1 i
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" ~ ~,uL~L"P? i / ~ t ~ ~ ~ I ~ ~ - CHANNEL STATION 26+45.77 11 ?
~ i~ I \y/ / ~ ~ I i:s II END CONSTRUCTION
1 ~ ,s ~ ~ ~ ! i 11 ' r _o...---- - - ( ~ ; II ~
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•
RO ECT L AT P TA'EAM D A TIKG S EXIS ~ PREPARED IN THE OFFICE OF: PR E T EN GTH 0 C GI1I~EER ECT LEN
ALES SC PHIC GRA 8000 Regency Parkway Suite 200
EXISTING STREAM TYPE G5c Cary, North Carolina 27511 Phone: [phone]
EXISTING STREAM LENGTH :NGTH = 1646 FEET ~~~Fr~~~~~~~~~ ~ Fax: [phone]
1 0 EXISTING REACH LENGTH 1646 50 25 0 50 0 UUETLAND ENHANCEMENT ARE .NT AREA = 2.0 ACRES
BANKFULL XSEC AREA 8.9
PLANS BANKFULL WIDTH 8.2
PRELIMINARY PLANS DOUG J. SMITH DO NOT U8B FOR CONBTRUC~'ION
50 100 WiD RATIO 7.5 50 25 0 PROJECT MANAGER
BANKFULL MAX DEPTH 2.3
PROFILE HORIZONTAL LETTING DATE: KEVIN L. TWEEDY PE
BANK HEIGHT RATIO 4,1
5 0 5 10 H ENT RATIO 1,2 ENTRENC M PROJECT DESIGN ENGINEER
NTACT: co CHRIS O'KEEFE
PE 0.013 xsw ~ SLO NEW HANOVER COUNTY PROJECT COORDINATOR P.E.
PROFILE ERTICAL SIGNATURE:

BUCK PROTECT REFERENCE NO. SHEEP NO.
l38 2
PROJECT ENGINEER
~gT~l[~ ~~C][$IEA~][ ~~NVIEI~T7C~~I~T~IL ~~~~~lL~ ~7CAN~~IR~ ~l~lE~g]FICI~7CY~N~
N.C. EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL pRELIMINARY PLANS
THALWEG SILT CHECK DECEMBER 1993 DO NOT U86 POR CONSTRVCTTON
TOP OF BANK
--III--I I F'-~ I I- SILT FENCE DOUBLE DROP ROCK CROSS VANE 6.06.01 TEMPORARY GRAVEL CONSTRUCTION ENTRANCE\EXIT
-------..o------- WETLAND BOUNDRY 6.60 TEMPORARY SEDIMENT TRAP
6.62 SEDIMENT FENCE
STEP POOL
6.70.01 TEMPORARY STREAM CROSSING
Cary, NoN~ Caroline 27611
TEMP. SEDIMENT TRAP BUCK X00 Regency Parkway Suite 200 Pone: 819-463-5488 ffiN6IN Effi RSN6 Faz: 919483-5490
~~N~~C~gJC~I~N S~~~J]EN~]E
1. The prep 6.06. II~T~D~~ ~]F ~lE~]El~+ ~C~ 2. The 1. The Contractor will use the existing construction access, if available. If a stabilized construction entrance is not available, the contractor shall
prepare one in accordancewith NC Erosion and Sediment Control Planning and Design Manus: Temporary Gravel Construction EntrancelExit:
6.06.1
2. The Contractor shall prepare the staging area(s) and stockpile area(s) as shown in the plans. If necessary, erect any safety fences, silt fences, or
Barri 3. The ~ TITLE SHEET 4. The 2 BUCK STREAM CONVENTIONAL SYMBOLS with INDEX OF SHEETS 5. The SUMMARY OF QUANTITIES are i STANDARD SPECIFICATIONS throu EARTHWORK SUMMARY 6. The CONSTRUCTION SEQUENCE onc 3 TYPICAL SECTIONS of th 8. The barriers. Stockpi I e materi al s that wi I I be needed during the i ni ti al stages of construction.
3. The Contractor shall install a temporary sedim~t trap at the downstrean most location as identified on the plus.
4. The Contractor will use the existing stream crossing, if available. If astream crossing is not avail~le, the contractor shall prepare one in accordance
with NC Erosion and Sediment Control Planning ~d Design M anual: Temporary Stream Crossing: 6.70.1
5. The Contractor shall install temporary coffer dams and pump around operations for Phase 1 at locations specified on the plans. [Limits of each phase
are identified on the erosion control measures plan sheets.] The portion of the channel isolated shall be dewatered ~d the removed water shall flow
through a special stilling basin according to project special provisions.
6. The Contractor shall begi n excavation of the stream bank. Excavation shall begi n on the upstream end and work downstream.
7. Once a section of bank has been excavated to design grades, instream structures, matting and plants shall be installed in that section per the direction
of the Engineer/Project M anger and the channel made ready to accept flow.
8. The Contractor shall remove the downstream coffer dam, then the upstream coffer dam, and finally the pump around operation, thereby allowing
STRUCTURE DETAILS W~ 4 TO 5 PLAN/PROFILE VIEW OF EXISTING STREAM 9. on CONDITIONS AND PROPOSED STREAM DESIGN thec EC-1 EROSION CONTROL DETAILS ~o. rne EROSION AND SEDIMENT CONTROL MEASURES degr EC-2 EROSION CONTROL PLAN VIEW resh RF-1 VEGETATION SELECTION 11. on PLANTING SPECS dist RF-2 REFORESTATION PLAN VIEW ~ fol lo Galen waken to flow into the completed portion of the chann~.
9. Once a section of new channel is completed and water routed in, the Contractor may begin construction of the ne~ct section (Phases 2 through 7) of
the channel beginning again at Step 4.
10. The wetland enhancement area will be planted according to plan in the eighth and final Phase of the project. Depending upon site conditions and the
degree of existing disturbance, some minor earthwork may be proposed for the enhanced area. Specifically, existing spoil piles and/or berms may be
reshaped to provide a more natural topography and flow regime through the enhanced wetl~d area.
11. Once a stream or w~land work Phase is complete the Contractor will apply temporary seeding, permanent seeding, and mulch to any other areas
disturbed during construction. Permanent seeding mixtures shall be applied as shown on the vegetation plan. Temporary sceding shall be applied in
all areas susceptible to erosion (i.e. disturbed ditch banks, steep slopes, and spoil areas) such that ground cover is established within 30 working days
following complyion of any phase of grading. P~man~t ground cover shall be established for all disturbed areas within 30 working days or 120
calendar days (whichever isshorter) following completion of construction.
12. The by th 13. The 12. The Contractor will install the interpretive sign ~ a location identified by the Project Engineer/Manager. The sign will be provided to the contractor
by the client.
13. The Contractor shall insure that the site is free of trash and leftover materials prior to demobilization of equipment from the site.
PHASE BEGINNING STATION ENDING STATION
1 10+pp 13+00
2 13+00 16+00
.~U~~1~~ Jt ~L ill ~1~1 ll ~ 1L ~1C..~ 3 16+00 18+50
4 18+50 21+00
Item D escription Quantity Unit 5 21+00 23+50
C Mobilization/Demobilization 1 L S 6 23+50 26+50
E 1 Temp Silt Fence 400 L F 7 REACH TO RECEIVE TWO STRUCTURES
E2 Filter Fabric, Type 2 N on-W oven 750 SY 8 ENHANCED WETIAND
E3 Special Stilling Basin 8 EA
E4 Diversion Pum p and System 1 L S
F1 Temp Seeding (Rye Grain) 280 LBS
F2 Seeding and Mulching 2.15 ACRES ]E~~I1~I~~CIE~ ]E~~$7C~i~~~3I~ ~~TI~M~~~
G Coconut (Coir) Fiber Matting 10,500 SY (IN CUBIC YARI)SD
H 1 Excavation, Fill, G rading 1 L S
H 2 Site Preparation 1 L S CUT TOTAL
LINE STATION TO STATION TOTAL UNDERCUT FILL + % BORROW WASTE
11 Stone Boulders (4' x 3' x 2') 440 TONS u
12 Class 1 Stone, Plain Rip-rap 80 TONS UNCLASS.
FUTCH CREEK 10+25.00 26+28.76 2281 0 0 2281
13 ClassA Stone, Plain Rip-rap 45 TONS FUTCH
14 Class6 Stone, Plain Rip-rap 12 TONS
15 #57 Stone 100 TON S
J1 Tree and Shrub Plantings 1450 EACH
J2 Wetland V egetation Plantings 525 EA C H TOTAL 2281 0 0 2281
K Live Staking 1200 EA C H
L Interpretive Sign Installation 1 LS SAY 2300 0 0 2300
GRAND TOTAL p

BUCK PROJECT F,EFERENCE N0, SHEET N0.
138 3
PROJECT ENGINEER
,,a i AL PI
PRELIMINARY PLANS
TOP OF BANK DO NOT EXCAVATE RIGHT BANK DO NOT U86 FOR OONSTRUCTION
CLASS 1 STONE, a PLAIN RIP RAP
HEADER
ROCK FLOW ~
is 0
EXISTING GROUND
EXISTING GROUND
8000 Regency Parkway Suite 200 Cary, North Carolina 27511
Phone: [phone] FOOTER ROCK ENaINEERiNG ~
2' Fax: [phone]
CLASS A STONE, FILTER FABRIC, TYPE 2
PLAIN RIP RAP
SECTION WIO BANKFULL BENCH
FLOW
PROFILE VIEW
TOP OF BANK DO NOT EXCAVATE RIGHT BANK ~ ~ r CLASS 1 STONE,
PLAIN RIP RAP
%~r ~
\ i. / /
~
R UND VARIES EXISTING G 0 FS ~ r r
2,~ EXISTING GROUND pro IBER MATTI 2 COIR F NG
3• •1 / - i 1
1
FILTER FABRIC ~ ~
r TYPE 2
SECTION WITH BANKFULL BENCH
NOTE: ~ r ~
DURING CONSTRUCTION, CORNERS OF DESIGN CHANNEL WILL BE ROUNDED
AND A THALWEG IMLL BE SHAPED PER DIRECTION OF ENGINEER.
CROSS SECTION
PLAN VIEW
D BL P R
113 113 113
BOTTOM BOTTOM BOTTOM
WIDTH OF WIDTH OF IDTH OF CHANNEL CHANNEL CHANNEL
FLOW VARIES
20° TO 25°
112 TO 213 BANKFULL #57 STONE 1~ STONE BOULDER HEADER ROCK
STONE BOULDE STONE BOULDER, HEADER ROCK 1' '
A STREAMBED
WATER _._._r„ o E FLOW 4 /o T010% SLOP BACKFILL WITH ON-SITE ALLUVIUM
~ w STREAMBED ;s~¢;~~s,;~~ ~
cw7 A' 0 ELEVATION ~~~M'•"~`
Q r ~ Q s.>.;:~ ~
a N ~ ~ ~ a ~ BACKFILL WITH ON-SITE ALLUVIUM 0 ~ ~ BACKWATER i ~ ~ #57 STONE
cw ~ ,r P00 ~ PC STONE BOULDER, FOOTER ROCK POOLS EXCAVATED PER FILTER FABRIC, TYPE 2 1'
Y ! r Y CLASS 11A STONE MIXTURE, PLAIN RIP RAP z ~ ~ i z DII DIRECTION OF ENGINEER 1_z~ CLASS 11A STONE MIXTURE, PLAIN RIP RAP
Q r-- Q m , m FILTER FABRIC, TYPE 2
~ \w^~ i 6' MINIMUM
r STONE BOULDER, FOOTER ROCK
` ~ PROFILE VIEW f SECTION A -A'
~ ~ r ~
~ ~ ~ ~ ' ~ 6'-8'
i ~ ` , ~ ~ p~,
~ ,SCOUR i ~ i ~
~ ~ POOL I - i
i NO GAPS
BETWEEN FLOODPLAIN SILL NOTES FOR ALL VANE STRUCTURES:
BOULDERS
~ , ` 1. BOULDERS MUST BE AT LEAST 4' x 3' x 2'.
POOLS EXCAVATED PER - DIRECTION OF ENGINEER 2. INSTALL FILTER FABRIC, TYPE 2 FOR DRAINAGE BEGINNING AT THE MIDDLE OF THE HEADER ROCKS AND
EXTEND DOWNWARD TO THE DEPTH OF THE BOTTOM FOOTER ROCK, AND THEN UPSTREAM TO A MINIMUM OF SU(FEET.
3. DIG A TRENCH BELOW THE BED FOR FOOTER ROCKS AND PLACE FILL ON
UPSTREAM SIDE OF VANE ARM, BETWEEN THE ARM AND STREAM BANK.
LAN VIEW P 4. START AT BANKFULL AND PLACE FOOTER ROCKS FIRST AND THEN HEADER (TOP) ROCK.
5. CONTINUE WITH~STRUCTURE, FOLLOWING ANGLE AND SLOPE SPECIFICATIONS.
6. USE PLAIN RIP RAP, CLASS 1V~ STONE MIXTURE, PLAIN RIP RAP TO FILL GAPS ON UPSTREAM SIDE
r OF BOULDERS, AND #57 STONE TO FILL GAPS ON UPSTREAM SIDE OF CLASS 1U1 STONE MIXTURE, PLAIN RIP RAP.
I {"i 7. AFTER ALL STONE HAS BEEN PLACED, FILL IN THE UPSTREAM SIDE OF THE
~i STRUCTURE WITH COMPACTED ON-SITE ALLUVIUM OR #57 STONE TO THE ELEVATION OF THE TOP OF THE HEADER ROCK.
ul
T' .`ij .r

..ice. 1

BUCK REFERENCE N0. SHEET N0. \
C-... 4. ~ ~ ~ / ' 1 1 1 1 ~ . 01388 4
1 ~ ! / / 1 i., 1 j ~ i i
s, W ! 1 ,,a t ~ ~`C..: ~ ~ 1 ! 1~ PROJECT ENGINEER , -
ti~•1 1 , ~ ~ t i~ i ~ ~w I I ~ I
it ~ ~ti i i'ce' ~ 1 ~
~ :i i i i 1 i 1 i i i/ ~ ~ 1 , ~ ,
~ ~ i i i/ 11 r. i 1 - / 1 ~ ~ t PRELIMINARY PLANS
1 ~ 7 ~ ~ ~ DO NOT USE FOR CONSTRUCTION ` ~
1 ~ ~ ~ , ~ >t i ~ ,
1 ~ v~/ ' ~ ~ ~ ~ . 1 ? ~ , ~ 1' E .e~~. ~ ,
1 1 ~ / / i
I' 'I 1 1 ~t y ~ 1, r I i ~ i ~ f - i
i `l'' .r / W t ~ / s '1 , ~ r+ ~w 6 ~ ! ~ -
'v 1 ~ t 1 ~ ~ ~ E f I ~ t ~ , .I 1 ~
~ VI ( ~ ~ ~ / k ~ ~ ~ 1 'i. . ~ ~ 8000 Regency Parkway Suite 200 I
M ~1 w' , I / t. MI I ~~.L.~/ / ~ Z Nf 1 ~ W,, ~.-i~ ~ ~ W Cary, North Carohna 27511
, k , t W ' I t f ' ~ ~ f W Phone: [phone] . •;1 P ~ ~ ~ INE (N ~ = EN(~INEERINC~ Fax. g1g-463-5490
I ' t , .1 UTL } ~
I ` S 5 it I i ~ ~ 'i ~ /
;1 ~ ' _ _ ~ _ ~ W ,r - - _ t:^~ ROCK CROSSVANE INVERT
I , M1 ' , ` 11" I ~ ~ 1 ~ ~ ~ ~ ~ , = STATION AND ELEVATIONS
i ! 1 1 t I , ' I f 1' 4 ~ ~ , . ,
i ; I ! r ~ ~ / ~.;ti,, Station Elevation
i 1 ~ _
J 1 ~ ' , ~ s~%~zs 4. li I _ ~ ~~i„. r,,~_ „r;,.
fli i ~ ~ i' y~
STATION 10+00.00 ; ~ ' • ! 105.00' ~ ~ ~ ° A t~, J ~ ~ ~ 12+10 29.5
BEGIN CONSTRUCTION t'I ~ _
' I I . N49 28 51'W f..- i I ! I ~ i . - ii it , iii _ I • ~ U 12+40 28.5 1' I I I ~ I-
ox ..III NlY ARY ss ~ ; ~ ~ - , - , I ~ • Q 13+45 26.5 ~ ~ ~ ~ ~ , I t , _ ~ ~ 13+95 2 .
~ ~WIDESA ~ ~ 55 • cry
SE s~ , ~ ~ t `t _ _ 0 14+14 24.5
~ ~ ~ ~ I ~ ~ ~ + 14+65 23.5
, ~ o h ~ N 14+85 22.5
tit "•.a ` \ q, ~ ~ 3t.~ , \ s CUT LINE ( 8~ °~fi;', l----_ ~ .
~ I ~ 16+50 21
, I ~ ~ ~ ~ 0 1 + ~ ~ 7 50 19 ~ ~ r -
ti~ v~` I 4 + 1 18 95 17
^.Y ~yS~~..-lam Yom. ~ \ 1 \ I 't I ~ ' ~ t , ~,.r F'- 20+05 16
I l ~ ~ \ ( N ( , I 22+70 14.5
, q= t , 23+80 13.5
i , ' i ' . + _ 25 25 12.5
~ ~ ~ ' ~ ~ , \ I ~ I ~ ~ ~ ~I
- - \ 'i' ! \ ~ ~ r ~ ~
'ir ~ \ j + t, I ~1 ~ l : ~ s, I
' '1.. /
i ~ I ' t~, I FUTCH CREEK ~ ~ ,t ~ 4
+'1 __y. N' 1 ~ ~ ,1 ~
~ ~ a -r'~
(5 50 25 0 50 100 -W?~~if~f~ihy--~-_ ` ~ .
GREEN f _ ~ - - - - - - -1 ~ s ~1 _ I ~ -1- '"CJ'T~
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BUCK PROJECT REFERENCE NO. SNEEf NO.
0138R EC-1
'._y PROJECT ENGINEER
~i
A D TYPI AL P M R ATI N
PRELIMINARY PLANS
DO NOT U86 POR CONBTAUCTION
COCONUT (COIR) FIBER MATTING
SPECIAL STILLING BASIN PLACE COIR FIBER MATfINCa IN B INCH DEEP
RIP RAP OUTLET TO (SEE PROJECT SPECIAL PROVISIONS) TRENCH, STAKE, BACKFILL, AND COMPACT N T ~ U C K moo eegency aarkway suite 200 1. BANKS SHOULD BE SEEDED PRIOR TO Cary, Notlh Carolina 2]511
DISSIPATE ENERGY. PLACEMENT OF MATTING. Pnore: aiarea-sass
METHOD AND ROCK SIZE TO BE DETERMINED TOP OF STREP,MBANK 2. PLACE COIR FIBER MATI7NG ACCORDING TO ~N6INY.DRIN6 ~ Fae: 918-983-5090 MANUFACTURER RECOMMENDATIONS.
IN THE FIELD TO ADDRESS SITE CONDITIONS 3. MATTING STAKES SHOULD BE PLACED
IN A DIAMOND SHAPED PATTERN.
DEWATERING PUMP
TOE OF SLOPE
IMPERVIOUS DIKE (SEE PROJECT SPECIAL PROVISIONS) BOTTOM OF CHANNEL
TEMPORARY FLEXIBLE
HOSE PUKE COIR FIBER MATTING IN 8 WCH DEEP TRENCH, STAKE, BACKFILL, AND COMPACT
CROSS SECTION VIEW
EXISTING CHANNEL
0
Z
TREND TRENCH TRENCH
0
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ TOP OF STREAMBANK TOP OF
TOP OF- STREnanenNK _1 • 1 1 • I • 1 • 1 I STAKES
TEMPORARY FLEXIBLE HOSE STREAMI - ~ • • • 1 • 1 • •-'--t----t--- t
• • • • • • • • t t •
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ COIR FIBER MATTING • ~ ~ , • , • ~ , ~ • • TO BE EXTENDED TO
TOE OF BANK
1 • t • 1 1 1 • 1 1 • •
PLAN VIEW
IMPERVIOUS DIKE
(SEE PROJECT SPECIAL PROVISIONS)
2..
PUMP-AROUND PUMP
Q~\y
RIP RAP INLET TO STABILIZE.
METHOD AND ROCK SIZE TO BE DETERMINED IN THE FIELD fV
TO ADDRESS SITE CONDITIONS
NPICAL MATTING STAKE
SEQUENCE OF CONSTRUCTION FOR TYPICAL PUMP AROUND
1. INSTALL SPECIAL STILLING BASIN AT THE DOWNSTREAM SPECIAL STIWNG BASIN
END OF THE DESIGNATED PROJECT WORKING AREA.
- ~ 2. THE CONTRACTOR WILL INSTALL THE PUMP AROUND PUMP AND THE TEMPORARY FLEXIBLE EROSION AND SEDIMENT CONTROL MEASURES
HOSE THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE WORK SITE TO THE RIP RAPPED OUTLET TO DISSIPATE ENERGY. EXISTING GROUND
3. INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN GRADING ACTIVITIES IN THE CHANNEL WILL BE PERFORMED IN THE DRY. TEMPORARY
PUMPING OPERATIONS FOR STREAM DIVERSION.
4. INSTALL THE DOWNSTREAM IMPERVIOUS DIKE. INSTALL PUMPING APPARATUS IF NEEDED IMPERIOUS DIKES WILL BE CONSTRUCTED UPSTREAM AND DOWNSTREAM
TO DEWATER THE ENTRAPPED AREA. THE PUMP AND HOSE FOR THIS PURPOSE OF THE PORTION OF CHANNEL THAT WILL BE UNDERGOING CONSTRUCTION. THE STREAM FLOW
SHALL BE OF SUFFICIENT SIZE TO DEWATER THE WORK AREA. FILTER FABRIC
THIS WATER WILL ALSO FLOW INTO A SPECIAL STIWNG BASIN. TYPE 2 WILL BE PUMPED AROUND. WORK SHALL BE COMPLETED IN PHASES AS IDENTIFIED IN
E F RM STREAM RESTORATION WORK IN ACCORDANCE WITH THE PLAN 15 - 20 FT 5. THE CONTRACTOR WILL P R 0 THE CONSTRUCTION SEQUENCE. THE PUMP SHOULD ADEQUATELY CONVEY
- AND FOLLOWING THE GENERAL CONSTRUCTION SEQUENCE. (SEE SHEET 2)
6. THE CONTRACTOR WILL EXCAVATE ANY ACCUMULATED SILT AND DEWATER BEFORE BASE FLOW (2.5 MAX CFS). THE TEMPORARY IMPERIOUS DIKES WILL BE REMOVED WHEN
REMOVAL OF THE IMPERVIOUS DIKE. REMOVE IMPERVIOUS DIKES, PUMPS, AND THE CONSTRUCTION OF EACH WORKING AREA IS COMPLETE. COCONUT (COIR) FIBER MATTING
TEMPORARY FLEXIBLE HOSE STARTING WITH THE DOWNSTREAM DIKE FIRST.
7. THE CONTRACTOR WILL COMPLETE ALL GRADING AND STABILIZATION IN ONE DAY WILL BE PLACED ON ALL DISTURBED BANKS.
WiTHIN THE PUMP AROUND AREA BETWEEN THE IMPERVIOUS DIKES.
8.ONCE THE WORKING AREA IS COMPLETED, REMOVE THE STIWNG BASINS AND STABILIZE DISTURBED AREAS WITH SEED AND MULCH.
EXCAVATED MATERIAL WILL BE TEMPORARILY STOCKPILED AS SHOWN ON THE PLANS. SILT
, v,, ,ua ~ FENCES WILL BE USED TO PREVENT SEDIMENT MIGRATION TOWARD
~.~x: THE OPEN CHANNELS ON SITE.
irs ` _4.; ;
,
iCa t