HomeMy WebLinkAbout20190175 Ver 1_B-4427 EC Special Provisions_20190207STABILIZATION REQUIREMENTS:
(3-11-2016)
Stabilization for this project shall comply with the time frame guidelines as specified by the
NCG-010000 general construction permit effective August 3, 2011 issued by the North Carolina
Department of Environment and Natural Resources Division of Water Quality. Temporary or
permanent ground cover stabilization shall occur within 7 calendar days from the last land-
disturbing activity, with the following exceptions in which temporary or permanent ground cover
shall be provided in 14 calendar days from the last land-disturbing activity:
• Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less
• Slopes 3:1 or flatter, with a slope of length of 50 ft. or less
• Slopes 4:1 or flatter
The stabilization timeframe for High Quality Water (HQW) Zones shall be 7 calendar days with
no exceptions for slope grades or lengths. High Quality Water Zones (HQW) Zones are defined
by North Carolina Administrative Code 15A NCAC 04A.0105 (25). Temporary and permanent
ground cover stabilization shall be achieved in accordance with the provisions in this contract
and as directed.
SEEDING AND MULCHING: (East)
The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and limestone,
shall be as stated below. During periods of overlapping dates, the kind of seed to be used shall
be determined. All rates are in pounds per acre.
All Roadway Areas
March 1 - August 31
50# Tall Fescue
10# Centipede
25# Bermudagrass (hulled)
500# Fertilizer
4000# Limestone
September 1 - February 28
50# Tall Fescue
10# Centipede
35# Bermudagrass (unhulled)
500# Fertilizer
4000# Limestone
Waste and Borrow Locations
March 1— August 31
75# Tall Fescue
25# Bermudagrass (hulled)
500# Fertilizer
4000# Limestone
September 1- February 28
75# Tall Fescue
35# Bermudagrass (unhulled)
500# Fertilizer
4000# Limestone
Note: 50# of Bahiagrass may be substituted for either Centipede or Bermudagrass only upon
Engineer's request.
Approved Tall Fescue Cultivars
06 Dust
2na Millennium
3rd Millennium
Apache III
Avenger
Barlexas
Barlexas II
Bar Fa
Barrera
Barrington
Barrobusto
Barvado
Biltmore
Bingo
Bizem
Blackwatch
Blade Runner II
Bonsai
Braveheart
Bravo
Bullseye
Cannavaro
Catalyst
Cayenne
Cessane Rz
Chipper
Cochise IV
Constitution
Corgi
Corona
Coyote
Darlington
Davinci
Desire
Dominion
Dynamic
Dynasty
Endeavor
Escalade
Essential
Evergreen 2
Falcon IV
Falcon NG
Falcon V
Faith
Fat Cat
Festnova
Fidelity
Finelawn Elite
Finelawn Xpress
Finesse II
Firebird
Firecracker LS
Firenza
Five Point
Focus
Forte
Garrison
Gazelle II
Gold Medallion
Grande 3
Greenbrooks
Greenkeeper
Gremlin
Greystone
Guardian 21
Guardian 41
Hemi
Honky Tonk
Hot Rod
Hunter
Inferno
Innovator
Integrity
Jaguar 3
Jamboree
Justice
Kalahari
Kitty Hawk 2000
Legitimate
Lexington
LSD
Magellan
Matador
Millennium SRP
Monet
Mustang 4
Ninj a 2
Ol' Glory
Olympic Gold
Padre
Patagonia
Pedigree
Picasso
Piedmont
Plantation
Proseeds 5301
Prospect
Pure Gold
Quest
Raptor II
Rebel Exeda
Rebel Sentry
Rebel IV
Regiment II
Regenerate
Rendition
Rhambler 2 SRP
Rembrandt
Reunion
Riverside
RNP
Rocket
Scorpion
Serengeti
Shelby
Sheridan
Signia
Silver Hawk
Sliverstar
Shenandoah Elite
Sidewinder
Skyline
Solara
Southern Choice II
Speedway
Spyder LS
Sunset Gold
Taccoa
Tanzania
Trio
Tahoe II
Talladega
Tarheel
Terrano
Titan ltd
Titanium LS
Tracer
Traverse SRP
Tulsa Time
Turbo
Turbo RZ
Tuxedo RZ
Ultimate
Venture
Umbrella
Van Gogh
Watchdog
Wolfpack II
Xtremegreen
On cut and fill slopes 2:1 or steeper Centipede shall be applied at the rate of 5 pounds per acre
and add 20# of Sericea Lespedeza from January 1- December 31.
Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be used provided the
1-2-2 ratio is maintained and the rate of application adjusted to provide the same amount of plant
food as a 10-20-20 analysis and as directed.
TEMPORARY SEEDING:
Fertilizer shall be the same analysis as specified for Seeding and Mulching and applied at the rate
of 400 pounds and seeded at the rate of 50 pounds per acre. Sweet Sudan Grass, German Millet
or Browntop Millet shall be used in summer months and Rye Grain during the remainder of the
year. The Engineer will determine the exact dates for using each kind of seed.
FERTILIZER TOPDRESSING:
Fertilizer used for topdressing on all roadway areas except slopes 2:1 and steeper shall be 10-20-
20 grade and shall be applied at the rate of 500 pounds per acre. A different analysis of fertilizer
may be used provided the 1-2-2 ratio is maintained and the rate of application adjusted to provide
the same amount of plant food as 10-20-20 analysis and as directed.
Fertilizer used for topdressing on slopes 2:1 and steeper and waste and borrow areas shall be 16-
8-8 grade and shall be applied at the rate of 500 pounds per acre. A different analysis of
fertilizer may be used provided the 2-1-1 ratio is maintained and the rate of application adjusted
to provide the same amount of plant food as 16-8-8 analysis and as directed.
SUPPLEMENTAL SEEDING:
The kinds of seed and proportions shall be the same as specified for Seeding and Mulching, with
the exception that no centipede seed will be used in the seed mix for supplemental seeding. The
rate of application for supplemental seeding may vary from 25# to 75# per acre. The actual rate
per acre will be determined prior to the time of topdressing and the Contractor will be notified in
writing of the rate per acre, total quantity needed, and areas on which to apply the supplemental
seed. Minimum tillage equipment, consisting of a sod seeder shall be used for incorporating
seed into the soil as to prevent disturbance of existing vegetation. A clodbuster (ball and chain)
may be used where degree of slope prevents the use of a sod seeder.
MOWING:
The minimum mowing height on this project shall be 4 inches.
STABILIZATION REOUIREMENTS:
Stabilization for this project shall comply with the time frame guidelines as specified by the
NCG-010000 general construction permit effective August 3, 2011 issued by the North Carolina
Department of Environment and Natural Resources Division of Water Quality. Temporary or
permanent ground cover stabilization shall occur within 7 calendar days from the last land-
disturbing activity, with the following exceptions in which temporary or permanent ground cover
shall be provided in 14 calendar days from the last land-disturbing activity:
• Slopes between 2:1 and 3:1, with a slope length of 10 ft. or less
• Slopes 3:1 or flatter, with a slope of length of 50 ft. or less
• Slopes 4:1 or flatter
The stabilization timeframe for High Quality Water (HQV� Zones shall be 7 calendar days with
no exceptions for slope grades or lengths. High Quality Water Zones (HQV� Zones are defined
by North Carolina Administrative Code 15A NCAC 04A.0105 (25). Temporary and permanent
ground cover stabilization shall be achieved in accordance with the provisions in this contract
and as directed.
NATIVE GRASS SEEDING AND MULCHING: (East)
Native Grass Seeding and Mulching shall be performed on the disturbed areas of wetlands and
riparian areas, and adjacent to Stream Relocation construction within a 50 foot zone on both
sides of the stream or depression, measured from top of stream bank or center of depression.
The stream bank of the stream relocation shall be seeded by a method that does not alter the
typical cross section of the stream bank. Native Grass Seeding and Mulching shall also be
performed in the permanent soil reinforcement mat section of preformed scour holes, and in
other areas as directed.
The kinds of seed and fertilizer, and the rates of application of seed, fertilizer, and limestone,
shall be as stated below. During periods of overlapping dates, the kind of seed to be used shall
be determined. All rates are in pounds per acre.
March 1- August 31
18# Creeping Red Fescue
6# Indiangrass
8# Little Bluestem
4# Switchgrass
25# Browntop Millet
500# Fertilizer
4000# Limestone
September 1- February 28
18# Creeping Red Fescue
6# Indiangrass
8# Little Bluestem
4# Switchgrass
35# Rye Grain
500# Fertilizer
4000# Limestone
Approved Creeping Red Fescue Cultivars:
Aberdeen Boreal Epic Cindy Lou
Fertilizer shall be 10-20-20 analysis. A different analysis of fertilizer may be used provided the
1-2-2 ratio is maintained and the rate of application adjusted to provide the same amount of plant
food as a 10-20-20 analysis and as directed.
Native Grass Seeding and Mulching shall be performed in accordance with Section 1660 of the
Standard Specifications and vegetative cover sufficient to restrain erosion shall be installed
immediately following grade establishment.
Temporary Seeding
Fertilizer shall be the same analysis as specified for Seeding and Mulching and applied at the rate
of 400 pounds and seeded at the rate of 50 pounds per acre. German Millet or Browntop Millet
shall be used in summer months and rye grain during the remainder of the year. The Engineer
will determine the exact dates for using each kind of seed.
Fertilizer Topdressing
Fertilizer used for topdressing shall be 16-8-8 grade and shall be applied at the rate of 500
pounds per acre. A different analysis of fertilizer may be used provided the 2-1-1 ratio is
maintained and the rate of application adjusted to provide the same amount of plant food as 16-8-
8 analysis and as directed.
Supplemental Seeding
The kinds of seed and proportions shall be the same as specified for Seeding and Mulching, and
the rate of application may vary from 25# to 75# per acre. The actual rate per acre will be
determined prior to the time of topdressing and the Contractor will be notified in writing of the
rate per acre, total quantity needed, and areas on which to apply the supplemental seed.
Minimum tillage equipment, consisting of a sod seeder shall be used for incorporating seed into
the soil as to prevent disturbance of existing vegetation. A clodbuster (ball and chain) may be
used where degree of slope prevents the use of a sod seeder.
Mowing
The minimum mowing height shall be 4 inches.
Measurement and Payment
Native Grass Seeding and Mulching will be measured and paid for in accordance with Article
1660-8 of the Standard Specifications.
All areas seeded and mulched shall be tacked with asphalt. Crimping of straw in lieu of
asphalt tack shall not be allowed on this project.
CRIMPING STRAW MULCH:
Crimping shall be required on this project adjacent to any section of roadway where
traffic is to be maintained or allowed during construction. In areas within six feet of the
edge of pavement, straw is to be applied and then crimped. After the crimping operation
is complete, an additional application of straw shall be applied and immediately tacked
with a sufficient amount of undiluted emulsified asphalt.
Straw mulch shall be of sufficient length and quality to withstand the crimping operation.
Crimping equipment including power source shall be subject to the approval of the
Engineer providing that maximum spacing of crimper blades shall not exceed 8".
REFORESTATION:
Description
Reforestation will be planted within interchanges and along the outside borders of the
road, and in other areas as directed. Reforestation is not shown on the plan sheets. See
the Reforestation Detail Sheet.
All non-maintained riparian buffers impacted by the placement of temporary fill or clearing
activities shall be restored to the preconstruction contours and revegetated with native
woody species.
The entire Reforestation operation shall comply with the requirements of Section 1670 of
the Standard Specifications.
Materials
Reforestation shall be bare root seedlings 12"-18" tall.
Construction Methods
Reforestation shall be shall be planted as soon as practical following permanent Seeding
and Mulching. The seedlings shall be planted in a 16-foot wide swath adjacent to mowing
pattern line, or as directed.
Root dip: The roots of reforestation seedlings shall be coated with a slurry of water, and
either a fine clay (kaolin) or a superabsorbent that is designated as a bare root dip. The
type, mixture ratio, method of application, and the time of application shall be submitted
to the Engineer for approval.
With the approval of the Engineer, seedlings may be coated before delivery to the job or at
the time of planting, but at no time shall the roots of the seedlings be allowed to dry out.
The roots shall be moistened immediately prior to planting.
Seasonal Limitations: Reforestation shall be planted from November 15 through March
15.
Measurement and Payment
Reforestation will be measured and paid for in accordance with Article 1670-17 of the
Standard Specifications.
RESPONSE FOR EROSION CONTROL:
Description
Furnish the labor, materials, tools and equipment necessary to move personnel,
equipment, and supplies to the project necessary for the pursuit of any or all of the
following work as shown herein, by an approved subcontractor.
Section Erosion Control Item Unit
1605 Temporary Silt Fence LF
SP S ecial Sediment Control Fence LF/TON
1615 Temporary Mulching ACR
162o Seed - Temporary Seeding LB
162o Fertilizer - Temporary Seeding TN
1631 Matting for Erosion Control SY
SP Coir Fiber Mat SY
SP Coir Fiber Baffles LF
SP Permanent Soil Reinforcement Mat SY
1660 Seeding and Mulching ACR
1661 Seed - Repair Seeding LB
1661 Fertilizer - Repair Seeding TON
1662 Seed - Supplemental Seeding LB
1665 Fertilizer To dressin TON
SP Safety/Highly Visible Fencing LF
SP Response for Erosion Control EA
Construction Methods
Provide an approved subcontractor who performs an erosion control action as described
in Form 1675. Each erosion control action may include one or more of the above work
items.
Measurement and Payment
Response for Erosion Control will be measured and paid for by counting the actual
number of times the subcontractor moves onto the project, including borrow and waste
sites, and satisfactorily completes an erosion control action described in Form 1675. The
provisions of Article 104-5 of the Standard Specifications will not apply to this item of
work.
Payment will be made under:
Pay Item Pay Unit
Response for Erosion Control Each
ENVIRONMENTALLY SENSITIVE AREAS:
Description
This project is located in an Environmentally Sensitive Area. This designation requires special
procedures to be used for clearing and grubbing, temporary stream crossings, and grading
operations within the Environmentally Sensitive Areas identified on the plans and as designated
by the Engineer. This also requires special procedures to be used for seeding and mulching and
staged seeding within the project.
The Environmentally Sensitive Area shall be defined as a 50-foot buffer zone on both sides of
the stream or depression measured from top of streambank or center of depression.
Construction Methods
(A) Clearing and Grubbing
In areas identified as Environmentally Sensitive Areas, the Contractor may perform
clearing operations, but not grubbing operations until immediately prior to beginning
grading operations as described in Article 200-1 of the Standard Specifications. Only
clearing operations (not grubbing) shall be allowed in this buffer zone until immediately
prior to beginning grading operations. Erosion control devices shall be installed
immediately following the clearing operation.
(B) Grading
Once grading operations begin in identified Environmentally Sensitive Areas, work shall
progress in a continuous manner until complete. All construction within these areas shall
progress in a continuous manner such that each phase is complete and areas are
permanently stabilized prior to beginning of next phase. Failure on the part of the
Contractor to complete any phase of construction in a continuous manner in
Environmentally Sensitive Areas will be just cause for the Engineer to direct the
suspension of work in accordance with Article 108-7 of the Standard Specifications.
(C) Temporary Stream Crossings
Any crossing of streams within the limits of this project shall be accomplished in
accordance with the requirements of Subarticle 107-12 of the Standard Specifications.
(D) Seeding and Mulching
Seeding and mulching shall be performed in accordance with Section 1660 of the
Standard Specifications and vegetative cover sufficient to restrain erosion shall be
installed immediately following grade establishment.
Seeding and mulching shall be performed on the areas disturbed by construction
immediately following �nal grade establishment. No appreciable time shall lapse into
the contract time without stabilization of slopes, ditches and other areas within the
Environmentally Sensitive Areas.
(E) Stage Seeding
The work covered by this section shall consist of the establishment of a vegetative cover
on cut and fill slopes as grading progresses. Seeding and mulching shall be done in
stages on cut and fill slopes that are greater than 20 feet in height measured along the
slope, or greater than 2 acres in area. Each stage shall not exceed the limits stated above.
Additional payments will not be made for the requirements of this section, as the cost for this
work shall be included in the contract unit prices for the work involved.
MINIMIZE REMOVAL OF VEGETATION:
The Contractor shall minimize removal of vegetation within project limits to the maximum
extent practicable. Vegetation along stream banks and adjacent to other jurisdictional resources
outside the construction limits shall only be removed upon approval of Engineer. No additional
payment will be made for this minimization work.
STOCKPILE AREAS:
The Contractor shall install and maintain erosion control devices sufficient to contain
sediment around any erodible material stockpile areas as directed.
ACCESS AND HAUL ROADS:
At the end of each working day, the Contractor shall install or re-establish temporary
diversions or earth berms across access/haul roads to direct runoff into sediment devices.
Silt fence sections that are temporarily removed shall be reinstalled across access/haul
roads at the end of each working day.
WASTE AND BORROW SOURCES:
Payment for temporary erosion control measures, except those made necessary by the
Contractor's own negligence or for his own convenience, will be paid for at the appropriate
contract unit price for the devices or measures utilized in borrow sources and waste areas.
No additional payment will be made for erosion control devices or permanent seeding and
mulching in any commercial borrow or waste pit. All erosion and sediment control practices that
may be required on a commercial borrow or waste site will be done at the Contractor's expense.
All offsite Staging Areas, Borrow and Waste sites shall be in accordance with `Borrow and
Waste Site Reclamation Procedures for Contracted Projects" located at:
http://www.ncdot.�ov/doh/operations/dp_chief en�/roadside/fieldops/downloads/Files/Contracte
dReclamationProcedures.ndf
All forms and documents referenced in the "Borrow and Waste Site Reclamation Procedures for
Contracted Projects" shall be included with the reclamation plans for offsite staging areas, and
borrow and waste sites.
SAFETY FENCE AND JURISDICTIONAL FLAGGING:
Description
Safety Fence shall consist of furnishing materials, installing and maintaining polyethylene or
polypropylene fence along the outside riparian buffer, wetland, or water boundary, or other
boundaries located within the construction corridor to mark the areas that have been approved to
infringe within the buffer, wetland, endangered vegetation, culturally sensitive areas or water.
The fence shall be installed prior to any land disturbing activities.
Interior boundaries for jurisdictional areas noted above shall be delineated by stakes and highly
visible flagging.
Jurisdictional boundaries at staging areas, waste sites, or borrow pits, whether considered outside
or interior boundaries shall be delineated by stakes and highly visible flagging.
Materials
(A) Safety Fencing
Polyethylene or polypropylene fence shall be a highly visible preconstructed safety fence
approved by the Engineer. The fence material shall have an ultraviolet coating.
Either wood posts or steel posts may be used. Wood posts shall be hardwood with a wedge or
pencil tip at one end, and shall be at least 5 ft. in length with a minimum nominal 2" x 2" cross
section. Steel posts shall be at least 5 ft. in length, and have a minimum weight of 0.85 lb/ft of
length.
(B) Boundary Flagging
Wooden stakes shall be 4 feet in length with a minimum nominal 3/4" x 1-3/4" cross section.
The flagging shall be at least 1" in width. The flagging material shall be vinyl and shall be
orange in color and highly visible.
Construction Methods
No additional clearing and grubbing is anticipated for the installation of this fence. The fence
shall be erected to conform to the general contour of the ground.
(A) Safety Fencing
Posts shall be set at a maximum spacing of 10 ft., maintained in a vertical position and hand set
or set with a post driver. Posts shall be installed a minimum of 2 ft. into the ground. If hand set,
all backfill material shall be thoroughly tamped. Wood posts may be sharpened to a dull point if
power driven. Posts damaged by power driving shall be removed and replaced prior to final
acceptance. The tops of all wood posts shall be cut at a 30-degree angle. The wood posts may,
at the option of the Contractor, be cut at this angle either before or after the posts are erected.
The fence geotextile shall be attached to the wood posts with one 2" galvanized wire staple
across each cable or to the steel posts with wire or other acceptable means.
Place construction stakes to establish the location of the safety fence in accordance with Article
105-9 or Article 801-1 of the Standard Specifications. No direct pay will be made for the staking
of the safety fence. All stakeouts for safety fence shall be considered incidental to the work
being paid for as "Construction Surveying", except that where there is no pay item for
construction surveying, all safety fence stakeout will be performed by state forces.
The Contractor shall be required to maintain the safety fence in a satisfactory condition for the
duration of the project as determined by the Engineer.
(B) Boundary Flagging
Boundary flagging delineation of interior boundaries shall consist of wooden stakes on 25 feet
maximum intervals with highly visible orange flagging attached. Stakes shall be installed a
minimum of 6" into the ground. Interior boundaries may be staked on a tangent that runs parallel
to buffer but must not encroach on the buffer at any location. Interior boundaries of hand
clearing shall be identified with a different colored flagging to distinguish it from mechanized
clearing.
Boundary flagging delineation of interior boundaries will be placed in accordance with Article
105-9 or Article 801-1 of the Standard Specifications. No direct pay will be made for
delineation of the interior boundaries. This delineation will be considered incidental to the work
being paid for as Construction Surveying, except that where there is no pay item or construction
surveying the cost of boundary flagging delineation shall be included in the unit prices bid for
the various items in the contract. Installation for delineation of all jurisdictional boundaries at
staging areas, waste sites, or borrow pits shall consist of wooden stakes on 25 feet maximum
intervals with highly visible orange flagging attached. Stakes shall be installed a minimum of 6"
into the ground. Additional flagging may be placed on overhanging vegetation to enhance
visibility but does not substitute for installation of stakes.
Installation of boundary flagging for delineation of all jurisdictional boundaries at staging areas,
waste sites, or borrow pits shall be performed in accordance with Subarticle 230-4(B)(5) or
Subarticle 802-2(F) of the Standard Specifications. No direct pay will be made for this
delineation, as the cost of same shall be included in the unit prices bid for the various items in the
contract.
The Contractor shall be required to maintain alternative stakes and highly visible flagging in a
satisfactory condition for the duration of the project as determined by the Engineer.
Measurement and Payment
Safety Fence will be measured and paid as the actual number of linear feet of polyethylene or
polypropylene fence installed in place and accepted. Such payment will be full compensation
including but not limited to furnishing and installing fence geotextile with necessary posts and
post bracing, staples, tie wires, tools, equipment and incidentals necessary to complete this work.
Payment will be made under:
Pay Item Pay Unit
Safety Fence Linear Foot
SILT FENCE COIR FIBER WATTLE BREAK:
Description
Silt Fence Coir Fiber Wattle Breaks are tubular products consisting of coir fibers (coconut fibers)
encased in coir fiber netting and used in conjunction with Temporary Silt Fence at toe of fills to
intercept runoff. Silt Fence Coir Fiber Wattle Breaks are to be placed at locations shown on the
plans or as directed. Installation shall follow the detail provided in the plans and as directed.
Work includes furnishing materials, installation, maintenance and removing Silt Fence Coir
Fiber Wattle Breaks.
Materials
Coir Fiber Wattle shall meet the following specifications:
100% Coir (Coconut) Fibers
Minimum Diameter 12 in.
Minimum Length 10 ft.
Minimum Density 3.5 lb/ft3 +/- 10%
Net Material Coir Fiber
Net Openings 2 in. x 2 in.
Net Strength 901bs.
Minimum Weight 2.61bs./ft. +/- 10%
Anchors: Stakes shall be used as anchors.
Wooden Stakes:
Provide hardwood stakes a minimum of 2-ft. long with a 2 in. x 2 in. nominal square
cross section. One end of the stake must be sharpened or beveled to facilitate driving
down into the underlying soil.
Provide staples made of 0.125" diameter new steel wire formed into a u shape not less than 12"
in length with a throat of 1" in width.
Construction Methods
A trench shall be excavated the entire length of the coir fiber wattle with a depth of 1 to 2 inches
for the wattle to be placed. Silt Fence Coir Fiber Wattle Breaks shall be secured to the soil by
wire staples approximately every 1 linear foot and at the end of each wattle. A minimum of 4
stakes shall be installed on the downslope side of the wattle with a maximum spacing of 2 linear
feet, and according to the detail. Install a minimum of 2 stakes on the upslope side of the Silt
Fence Coir Fiber Wattle Break according to the detail provided in the plans. Stakes shall be
driven into the ground a minimum of 10 in. with no more than 2 in. projecting from the top of the
wattle. Drive stakes at an angle according to the detail provided in the plans.
Install Temporary Silt Fence in accordance with section 1605 of the Standard Specifications and
overlap each downslope side of silt fence wattle break by 6 in.
The Contractor shall maintain the Silt Fence Coir Fiber Wattle Breaks until the project is
accepted or until the Silt Fence Coir Fiber Wattle Breaks are removed, and shall remove and
dispose of silt accumulations at the Silt Fence Coir Fiber Wattle Breaks when so directed in
accordance with the requirements of Section 1630 of the Standard Specifications.
Measurement and Payment
Silt Fence Coir Fiber Wattle Break will be measured and paid for by the actual number of linear
feet of Silt Fence Coir Fiber Wattle Breaks which are installed and accepted. Such price and
payment will be full compensation for all work covered by this section, including, but not limited
to, furnishing all materials, labor, equipment and incidentals necessary to install the Silt Fence
Coir Fiber Wattle Break.
Payment will be made under:
Pay Item Pay Unit
Coir Fiber Wattle Linear Foot
COIR FIBER WATTLE BARRIER:
(5-20-13) 1630
Description
Coir fiber wattle barriers are tubular products consisting of coir fibers (coconut fibers) encased in
coir fiber or synthetic netting and used at the toe of fills or on slopes to intercept runof£ Coir
fiber wattle barriers are to be placed at locations shown on the plans or as directed. Installation
shall follow the detail provided in the plans and as directed. Work includes furnishing materials,
installation, maintenance and removing coir fiber wattle barriers.
Materials
Coir fiber wattle shall meet the following specifications:
Inner Material 100% Coir (Coconut) Fibers
Minimum Diameter 18"
Minimum Length 10 ft.
Minimum Density S lb./c.f. � 10%
Net Material Coir (Coconut) or Synthetic
Net Openings 2" x 2"
Net Strength 901b.
Minimum Weight lO lb./ft. � 10%
Stakes shall be used as anchors. Provide hardwood stakes a minimum of 2-ft long with
a 2" x 2" nominal square cross section. One end of the stake shall be sharpened or beveled to
facilitate driving down into the underlying soil.
Provide staples made of 0.125" diameter new steel wire formed into a U-shape not less
than 12" in length with a throat of 1" in width.
Construction Methods
Align coir fiber wattle barriers in an overlapping and alternating pattern. Excavate a trench the
entire length of each wattle with a depth of 2" to 3" for the wattle to be placed. Secure coir fiber
wattle barriers to the soil by wire staples approximately every linear foot and at the end of each
wattle. Install at least 4 stakes on the downslope side of the wattle with a maximum spacing of
2linear feet and according to the detail. Install at least 2 stakes on the upslope side of the coir
fiber wattle barriers according to the detail provided in the plans. Drive stakes into the ground at
least 10" with no more than 2" projecting from the top of the wattle. Drive stakes at an angle
according to the detail provided in the plans.
For coir fiber wattle barriers used to reduce runoff velocity for large slopes, use a maximum
spacing of 25 ft. for the barrier measured along the slope.
Maintain the coir fiber wattle barriers until the project is accepted or until the coir fiber wattle
barriers are removed, and remove and dispose of silt accumulations at the coir �ber wattle
barriers when so directed in accordance with Section 1630 of the 2012 Standard Specifications.
Measurement and Payment
Coir Fiber Wattle Barrier will be measured and paid as the actual number of linear feet of coir
fiber wattle barrier installed and accepted. Such price and payment will be full compensation for
all work covered by this provision, including, but not limited to, furnishing all materials, labar,
equipment and incidentals necessary to install the coir fiber wattle barrier.
Payment will be made under:
Pay Item Pay Unit
Coir Fiber Wattle Barrier Linear Foot
COIR FIBER MAT:
Description
Furnish material, install and maintain coir fiber mat in locations shown on the plans or in
locations as directed. Work includes providing all materials, excavating and backfilling, and
placing and securing coir fiber mat with stakes, steel reinforcement bars or staples as directed.
Materials
Item
Coir Fiber Mat
Anchors: Stakes, reinforcement bars, or staples shall be used as anchors.
Wooden Stakes:
Section
1060-14
Provide hardwood stakes 12"- 24" long with a 2" x 2" nominal square cross section. One
end of the stake must be sharpened or beveled to facilitate driving through the coir fiber
mat and down into the underlying soil. The other end of the stake needs to have a 1"- 2"
long head at the top with a 1"- 2" notch following to catch and secure the coir fiber mat.
Steel Reinforcement Bars:
Provide uncoated #10 steel reinforcement bars 24" nominal length. The bars shall have a
4" diameter bend at one end with a 4" straight section at the tip to catch and secure the
coir fiber mat.
Staples:
Provide staples made of 0.125" diameter new steel wire formed into a u shape not less
than 12" in length with a throat of 1" in width.
Construction Methods
Place the coir fiber mat immediately upon final grading. Provide a smooth soil surface free from
stones, clods, or debris that will prevent the contact of the mat with the soil. Unroll the mat and
apply without stretching such that it will lie smoothly but loosely on the soil surface.
For stream relocation applications, take care to preserve the required line, grade, and cross
section of the area covered. Bury the top slope end of each piece of mat in a narrow trench at
least 6 in. deep and tamp firmly. Where one roll of matting ends and a second roll begins,
overlap the end of the upper roll over the buried end of the second roll so there is a 6 in. overlap.
Construct check trenches at least 12 in. deep every 50 ft. longitudinally along the edges of the
mat or as directed. Fold over and bury mat to the full depth of the trench, close and tamp firmly.
Overlap mat at least 6 in. where 2 or more widths of mat are installed side by side.
Place anchors across the mat at the ends approximately 1 ft. apart. Place anchors along the outer
edges and down the center of the mat 3 ft. apart.
Adjustments in the trenching or anchoring requirements to fit individual site conditions may be
required.
Measurement and Payment
Coir Fiber Mat will be measured and paid for as the actual number of square yards measured
along the surface of the ground over which coir fiber mat is installed and accepted.
No measurement will be made for anchor items.
Payment will be made under:
Pay Item Pay Unit
Coir Fiber Mat Square Yard
FLOATING TURBIDITY CURTAIN:
Description
This work consists of furnishing a Floating Turbidity Curtain to deter silt suspension and
movement of silt particles during construction. The floating turbidity curtain shall be
constructed at locations as directed.
Materials
The curtain material shall be made of a tightly woven nylon, plastic or other non-
deteriorating material meeting the following specifications:
Property Value
Grab tensile strength *md-370 lbs *cd-250 lbs
Mullen burst stength 480 psi
Trapezoid tear strength *md-100 lbs *cd-60 lbs
Apparent opening size 70 US standard sieve
Percent open area 4% permittivity 0.28 seo- 1
*md - machine direction
*cd - cross machine direction
In the event that more than one width of fabric is required, a 6" overlap of the material
shall also be required.
The curtain material shall be supported by a flotation material having over 29 lbs/ft
buoyancy. The floating curtain shall have a 5/16" galvanized chain as ballast and dual
5/16" galvanized wire ropes with a heavy vinyl coating as load lines.
Construction Methods
The Contractor shall maintain the Floating Turbidity Curtain in a satisfactory condition
until its removal is requested by the Engineer. The curtain shall extend to the bottom of
the jurisdictional resource. Anchor the curtain according to manufacturer
recommendations.
Measurement and Payment
Floating Turbidity Curtain will be measured and paid for as the actual number of square
yards of curtain furnished as specified and accepted. Such price and payrnent will be full
compensation for the work as described in this section including but not limited to
furnishing all materials, tools, equipment, and all incidentals necessary to complete the
work.
Payrnent will be made under:
Pay Item Pay Unit
Floating Turbidity Curtain Square Yard
CONCRETE WASHOUT STRUCTURE:
�i2-oi-is>
Description
Concrete washout structures are enclosures above or below grade to contain concrete waste
water and associated concrete mix from washing out ready-mix trucks, drums, pumps, or other
equipment. Concrete washouts must collect and retain all the concrete washout water and solids,
so that this material does not migrate to surface waters or into the ground water. These
enclosures are not intended for concrete waste not associated with wash out operations.
The concrete washout structure may include constructed devices above or below ground and or
commercially available devices designed specifically to capture concrete waste water.
Materials
Item
Temporary Silt Fence
Safety Fence shall meet the specifications as provided elsewhere in this contract.
Section
1605
Geomembrane basin liner shall meet the following minimum physical properties for low
permeability; it shall consist of a polypropylene or polyethylene 10 mil think geomembrane. If
the minimum setback dimensions can be achieved the liner is not required. (5 feet above
groundwater, 50 feet from top of bank of perennial stream, other surface water body, or
wetland.)
Construction Methods
Build an enclosed earthen berm or excavate to form an enclosure in accordance with the details
and as directed.
Install temporary silt fence around the perimeter of the enclosure in accordance with the details
and as directed if structure is not located in an area where existing erosion and sedimentation
control devices are capable to containing any loss of sediment.
Post a sign with the words "Concrete Washout" in close proximity of the concrete washout area,
so it is clearly visible to site personnel.
The construction details for the above grade and below grade concrete washout structures can be
found on the following web page link:
http://www.ncdot.�ov/doh/operations/d� chief eng/roadside/soil_water/details/
Alternate details for accommodating concrete washout may be submitted for review and
approval.
The alternate details shall include the method used to retain and dispose of the concrete waste
water within the project limits and in accordance with the minimum setback requirements. (5 feet
above groundwater, 50 feet from top of bank of perennial stream, other surface water body, or
wetland.)
Maintenance and Removal
Maintain the concrete washout structure(s) to provide adequate holding capacity plus a minimum
freeboard of 12 inches. Remove and dispose of hardened concrete and return the structure to a
functional condition after reaching 75% capacity.
Inspect concrete washout structures for damage and maintain for effectiveness.
Remove the concrete washout structures and sign upon project completion. Grade the earth
material to match the existing contours and permanently seed and mulch area.
Measurement and Payment
Concrete Washout Structure will be paid for per each enclosure installed in accordance with the
details. If alternate details are approved then those details will also be paid for per each approved
and installed device.
Temporary Silt Fence will be measured and paid for in accordance with Article 1605-5 of the
Standard Specifications.
No measurement will be made for other items or for over excavation or stockpiling.
Payment will be made under:
Pay Item Pay Unit
Concrete Washout Structure Each
PERMANENT SEEDING AND MULCHING:
(7-1-95) 1660 SP16 R02
The Department desires that permanent seeding and mulching be established on this project as
soon as practical after slopes or portions of slopes have been graded. As an incentive to obtain
an early stand of vegetation on this project, the Contractor's attention is called to the following:
For all permanent seeding and mulching that is satisfactorily completed in accordance with the
requirements of Section 1660 in the 2012 Standard Specifications and within the following
percentages of elapsed contract times, an additional payment will be made to the Contractor as
an incentive additive. The incentive additive will be determined by multiplying the number of
acres of seeding and mulching satisfactorily completed times the contract unit bid price per acre
for Seeding and Mulching times the appropriate percentage additive.
Percentage of Elapsed Contract Time
0% - 30%
30.01 % - 50%
Percentage Additive
30%
15%
�
Percentage of elapsed contract time is defined as the number of calendar days from the date of
availability of the contract to the date the permanent seeding and mulching is acceptably
completed divided by the total original contract time.
PERMANENT VEGETATION ESTABLISHMENT:
(2-16-12)(Rev.10-15-13) 104 SP1 G16
Establish a permanent stand of the vegetation mixture shown in the contract. During the period
between initial vegetation planting and final project acceptance, perform all work necessary
to establish permanent vegetation on all erodible areas within the project limits, as well as,
in borrow and waste pits. This work shall include erosion control device maintenance and
installation, repair seeding and mulching, supplemental seeding and mulching, mowing,
and fertilizer topdressing, as directed. All work shall be performed in accordance with the
applicable section of the 2012 Standard Specifications. All work required for initial vegetation
planting shall be performed as a part of the work necessary for the completion and acceptance of
the Intermediate Contract Time (ICT). Between the time of ICT and Final Project acceptance,
or otherwise referred to as the vegetation establishment period, the Department will be
responsible for preparing the required National Pollutant Discharge Elimination System
(NPDES) inspection records.
Once the Engineer has determined that the permanent vegetation establishment requirement has
been achieved at an 80% vegetation density (the amount of established vegetation per given area
to stabilize the soil) and no erodible areas exist within the project limits, the Contractor will be
notified to remove the remaining erosion control devices that are no longer needed.
The Contractor will be responsible for, and shall correct any areas disturbed by operations
performed in permanent vegetation establishment and the removal of temporary erosion control
measures, whether occurring prior to or after placing traffic on the project.
Payment for Response for Erosion Control, Seeding and Mulching, Repair Seeding,
Supplemental Seeding, Mowing, Fertilizer Topdressing, Silt Excavation, and Stone for Erosion
Control will be made at contract unit prices for the affected items. Work required that is not
represented by contract line items will be paid in accordance with Articles 104-7 or 104-3 of the
2012 Standard Specifications. No additional compensation will be made for maintenance and
removal of temporary erosion control items.
EROSION AND SEDIMENT CONTROL/STORMWATER CERTIFICATION:
(1-16-07) (Rev 11-22-16) 105-16, 225-2, 16 SPl G180
General
Schedule and conduct construction activities in a manner that will minimize soil erosion and the
resulting sedimentation and turbidity of surface waters. Comply with the requirements herein
regardless of whether or not a National Pollution discharge Elimination System (NPDES) permit
for the work is required.
Establish a chain of responsibility for operations and subcontractors' operations to ensure that the
Erosion and Sediment Control/Stormwater Pollution Prevention Plan is implemented and
maintained over the life of the contract.
(A) Certified Supervisor - Provide a certified Erosion and Sediment Control/Stormwater
Supervisor to manage the Contractor and subcontractor operations, insure compliance with
Federal, State and Local ordinances and regulations, and manage the Quality Control
Program.
(B) Certified Foreman - Provide a certified, trained foreman for each construction operation
that increases the potential for soil erosion or the possible sedimentation and turbidity of
surface waters.
(C) Certified Installer - Provide a certified installer to install or direct the installation for
erosion or sediment/stormwater control practices.
(D) Certified Designer - Provide a certified designer for the design of the erosion and sediment
control/stormwater component of reclamation plans and, if applicable, for the design of the
project erosion and sediment control/stormwater plan.
Roles and Responsibilities
(A) Certified Erosion and Sediment Control/Stormwater Supervisor - The Certified Supervisor
shall be Level II and responsible for ensuring the erosion and sediment control/stormwater
plan is adequately implemented and maintained on the project and for conducting the
quality control program. The Certified Supervisor shall be on the project within 24 hours
notice from initial exposure of an erodible surface to the project's final acceptance.
Perform the following duties:
(1) Manage Operations - Coordinate and schedule the work of subcontractors so that
erosion and sediment control/stormwater measures are fully executed for each
operation and in a timely manner over the duration of the contract.
(a) Oversee the work of subcontractors so that appropriate erosion and
sediment control/stormwater preventive measures are conformed to at each
stage of the work.
(b) Prepare the required National Pollutant Discharge Elimination System
(NPDES) Inspection Record and submit to the Engineer.
(c) Attend all weekly or monthly construction meetings to discuss the findings
of the NPDES inspection and other related issues.
(d) Implement the erosion and sediment control/stormwater site plans
requested.
(e) Provide any needed erosion and sediment control/stormwater practices for
the Contractor's temporary work not shown on the plans, such as, but not
limited to work platforms, temporary construction, pumping operations,
plant and storage yards, and cofferdams.
( fl Acquire applicable permits and comply with requirements for borrow pits,
dewatering, and any temporary work conducted by the Contractor in
jurisdictional areas.
(g) Conduct all erosion and sediment control/stormwater work in a timely and
workmanlike manner.
(h) Fully perform and install erosion and sediment control/stormwater work
prior to any suspension of the work.
(i) Coordinate with Department, Federal, State and Local Regulatory agencies
on resolution of erosion and sediment control/stormwater issues due to the
Contractor's operations.
(j) Ensure that proper cleanup occurs from vehicle tracking on paved surfaces
or any location where sediment leaves the Right-of-Way.
(k) Have available a set of erosion and sediment control/stormwater plans that
are initialed and include the installation date of Best Management Practices.
These practices shall include temporary and permanent groundcover and be
properly updated to reflect necessary plan and field changes for use and
review by Department personnel as well as regulatory agencies.
(2) Requirements set forth under the NPDES Permit - The Department's NPDES
Stormwater permit (NCS000250) outlines certain objectives and management
measures pertaining to construction activities. The permit references NCG010000,
General Permit to Discharge Stormwater under the NPDES, and states that the
Department shall incorporate the applicable requirements into its delegated Erosion
and Sediment Control Program for construction activities disturbing one or more
acres of land. The Department further incorporates these requirements on all
contracted bridge and culvert work at jurisdictional waters, regardless of size.
Some of the requirements are, but are not limited to:
(a) Control project site waste to prevent contamination of surface or ground
waters of the state, i.e. from equipment operation/maintenance, construction
materials, concrete washout, chemicals, litter, fuels, lubricants, coolants,
hydraulic fluids, any other petroleum products, and sanitary waste.
(b) Inspect erosion and sediment control/stormwater devices and stormwater
discharge outfalls at least once every 7 calendar days and within 24 hours
after a rainfall event of 0.5 inch that occurs within a 24 hour period.
Additional monitoring may be required at the discretion of Division of
Water Resources personnel if the receiving stream is 303(d) listed for
turbidity and the project has had documented problems managing turbidity.
(c) Maintain an onsite rain gauge or use the Department's Multi-Sensor
Precipitation Estimate website to maintain a daily record of rainfall amounts
and dates.
(d) Maintain erosion and sediment control/stormwater inspection records for
review by Department and Regulatory personnel upon request.
(e) Implement approved reclamation plans on all borrow pits, waste sites and
staging areas.
(� Maintain a log of turbidity test results as outlined in the Department's
Procedure for Monitoring Borrow Pit Discharge.
(g) Provide secondary containment for bulk storage of liquid materials.
(h) Provide training for employees concerning general erosion and sediment
control/stormwater awareness, the Department's NPDES Stormwater
Permit NCS000250 requirements, and the applicable requirements of the
General Permit, NCG010000.
(i) Report violations of the NPDES permit to the Engineer immediately who
will notify the Division of Water Quality Regional Office within 24 hours
of becoming aware of the violation.
(3) Quality Control Program - Maintain a quality control program to control erosion,
prevent sedimentation and follow provisions/conditions of permits. The quality
control program shall:
(a) Follow permit requirements related to the Contractor and subcontractors'
construction activities.
(b) Ensure that all operators and subcontractors on site have the proper erosion
and sediment control/stormwater certification.
(c) Notify the Engineer when the required certified erosion and sediment
control/stormwater personnel are not available on the job site when needed.
(d) Conduct the inspections required by the NPDES permit.
(e) Take corrective actions in the proper timeframe as required by the NPDES
permit for problem areas identified during the NPDES inspections.
(� Incorporate erosion control into the work in a timely manner and stabilize
disturbed areas with mulch/seed or vegetative cover on a section-by-section
basis.
(g) Use flocculants approved by state regulatory authorities where appropriate
and where required for turbidity and sedimentation reduction.
(h) Ensure proper installation and maintenance of temporary erosion and
sediment control devices.
(i) Remove temporary erosion or sediment control devices when they are no
longer necessary as agreed upon by the Engineer.
(j) The Contractor's quality control and inspection procedures shall be subject
to review by the Engineer. Maintain NPDES inspection records and make
records available at all times for verification by the Engineer.
(B) Certified Foreman - At least one Certified Foreman shall be onsite for each type of work
listed herein during the respective construction activities to control erosion, prevent
sedimentation and follow permit provisions:
(1) Foreman in charge of grading activities
(2) Foreman in charge of bridge or culvert construction over jurisdictional areas
(3) Foreman in charge of utility activities
The Contractor may request to use the same person as the Level II Supervisor and Level II
Foreman. This person shall be onsite whenever construction activities as described above
are taking place. This request shall be approved by the Engineer prior to work beginning.
The Contractor may request to name a single Level II Foreman to oversee multiple
construction activities on small bridge or culvert replacement projects. This request shall
be approved by the Engineer prior to work beginning.
(C) Certified Installers - Provide at least one onsite, Level I Certified Installer for each of the
following erosion and sediment control/stormwater crew:
(1)
�2)
(3)
(4)
(5)
(6)
��)
�g)
(9)
(10)
(11)
(12)
(13)
(14)
Seeding and Mulching
Temporary Seeding
Temporary Mulching
Sodding
Silt fence or other perimeter erosion/sediment control device installations
Erosion control blanket installation
Hydraulic tackifier installation
Turbidity curtain installation
Rock ditch check/sediment dam installation
Ditch liner/matting installation
Inlet protection
Riprap placement
Stormwater BMP installations (such as but not limited to level spreaders,
retention/detention devices)
Pipe installations within jurisdictional areas
If a Level I Certified Installer is not onsite, the Contractor may substitute
a Level II Foreman for a Level I Installer, provided the Level II Foreman is not tasked to
another crew requiring Level II Foreman oversight.
(D) Certified Designer - Include the certification number of the Level III-B Certified Designer
on the erosion and sediment control/stormwater component of all reclamation plans and if
applicable, the certification number of the Level III-A Certified Designer on the design of
the project erosion and sediment control/stormwater plan.
Preconstruction Meeting
Furnish the names of the Certified Erosion and Sediment Control/Stormwater Supervisor,
Certified Foremen, Certified Installers and Certified Designer and notify the Engineer of changes
in certified personnel over the life of the contract within 2 days of change.
Ethical Responsibility
Any company performing work for the North Carolina Department of Transportation has the
ethical responsibility to fully disclose any reprimand or dismissal of an employee resulting from
improper testing or falsification of records.
Revocation or Suspension of Certification
Upon recommendation of the Chief Engineer to the certification entity, certification for
Supervisor, Certified Foremen, Certified Installers and Certified Designer may be revoked or
suspended with the issuance of an Immediate Corrective Action (ICA), Notice of Violation (NOV),
or Cease and Desist Order for erosion and sediment control/stormwater related issues.
The Chief Engineer may recommend suspension or permanent revocation of certification due to
the following:
(A) Failure to adequately perform the duties as defined within this certification provision.
(B) Issuance of an ICA, NOV, or Cease and Desist Order.
(C) Failure to fully perform environmental commitments as detailed within the permit
conditions and specifications.
(D) Demonstration of erroneous documentation or reporting techniques.
(E) Cheating or copying another candidate's work on an examination.
(F) Intentional falsification of records.
(G) Directing a subordinate under direct or indirect supervision to perform any of the above
actions.
(H) Dismissal from a company for any of the above reasons.
(I) Suspension or revocation of one's certification by another entity.
Suspension or revocation of a certification will be sent by certified mail to the certificant and the
Corporate Head of the company that employs the certificant.
A certificant has the right to appeal any adverse action which results in suspension or permanent
revocation of certification by responding, in writing, to the Chief Engineer within 10 calendar days
after receiving notice of the proposed adverse action.
Chief Engineer
1536 Mail Service Center
Raleigh, NC 27699-1536
Failure to appeal within 10 calendar days will result in the proposed adverse action becoming
effective on the date specified on the certified notice. Failure to appeal within the time specified
will result in a waiver of all future appeal rights regarding the adverse action taken. The certificant
will not be allowed to perform duties associated with the certification during the appeal process.
The Chief Engineer will hear the appeal and make a decision within 7 days of hearing the appeal.
Decision of the Chief Engineer will be final and will be made in writing to the certificant.
If a certification is temporarily suspended, the certificant shall pass any applicable written
examination and any proficiency examination, at the conclusion of the specified suspension period,
prior to having the certification reinstated.
Measurement and Payment
Certified Erosion and Sediment Control/Stormwater Supervisor, Certified Foremen, Certified
Installers and Certified Designer will be incidental to the project for which no direct compensation
will be made.