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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.