657.08 659 657.08 Method of Measurement. The Department will measure Riprap for Tree Protection by the number of square yards (square meters) in place, completed and accepted. The Department will measure parallel to the face of the wells or walls.
657.09 Basis of Payment. The Department will pay for embankment and
excavation under Item 203 and the pipe for drains under Ite m 611. The Department will pay for accepted quantities at the contract price for as follows: Item Unit Description 657 Square Yard Riprap for Tree Protection (Square Meter) ITEM 658 TREE ROOT AERATION
658.01 Description
658.02 Materials
658.03 Preparation
658.04 Aeration for Trees Not Welled
658.05 Aeration with Tree Wells
658.06 Earth Embankment
658.07 Method of Measurement
658.08 Basis of Payment
658.01 Description. This work consists of furnishing and placing the necessary
aggregate and tile for the protection and aeration of the roots of trees and shrubs. Use removed or excavated materials in the Work when the material conforms to the specifications; if not, then recycle or dispose of the material according to 105.16 and 105.17.
658.02 Mater ials. Furnish aggregate for tree root aeration and protection
consisting of No. 4 or 467 limestone or gravel with a maximum sodium soundness loss of 15 percent. Furnish 4 inch (100 mm) pipe conforming to 611 Type E conduit. Furnish embankment conforming t o Item 203.
658.03 Preparation. The feeding root area to be protected and aerated is the
ground surface area lying within the periphery of the tree or shrub not marked for removal. Prepare these areas by excavating all vegetation, wood, brush, and debris.
658.04 Aeration for Trees Not Welled. Where the earth fill is less than 12
inches (300 mm) and more than 4 inches (100 mm) over the feeding root area, loosely spread an aggregate aeration course of one -half the height of fill, but not less than 3 inches (7 5 mm), over this area. At the tree trunk, increase the thickness to the height of the fill and extend it outward from the tree trunk in collar form for a distance of 15 inches (0.4 m). Place a 2 -inch (50 mm) layer of straw or hay over the aggregate. 658.05 660 658.05 Aeration with Tree Wells. Place an aeration course of aggregate while constructing the tree wells and before any other filling. Do not place any aggregate inside the tree well (between the wall and the tree trunk). Place the aggregate over the entire feed ing root area outside of the tree wells to a total depth of 6 inches (150 mm) for each 12 inches (300 mm) of earth fill, or proportion thereof, but place a minimum depth of 6 inches (150 mm) regardless of depth of overlying fill. Place a 2-inch (50 mm) lay er of straw or hay over the aeration layer.
658.06 Earth Embankment. Perform excavation and embankment, as
necessary, according to Item 203.
658.07 Method of Measurement. The Department will measure Tree Root
Aeration by the number of cubic yards (cubic me ters), measured in the carrier or truck according to 109, of the aggregate furnished, placed, completed, and accepted.
658.08 Basis of Payment. The Department will pay for embankment and
excavation under Item 203 and the pipe under Item 611. The Department will pay for accepted quantities at the contract price as follows: Item Unit Description 658 Cubic Yard Tree Root Aeration (Cubic Meter) ITEM 659 SEEDING AND MULCHING
659.01 Description
659.02 Testing of Soil or Topsoil
659.03 Lime
659.04 Commercial Fertilizer
659.05 Topsoil
659.06 Compost
659.07 Seeds
659.08 Legumes
659.09 Native Grasses and Wildflowers
659.10 Site Preparation
659.11 Placing Topsoil
659.12 Seeding Methods
659.13 Mulching Operation
659.14 Straw Mulch
659.15 Wood Fiber Mulch
659.16 Com post Mulch
659.17 Watering
659.18 Maintenance
659.19 Mowing
659.20 Repair Seeding and Mulching
659.21 Inter -Seeding
659.22 Fertilization: 2nd Application
659.23 Performances 659.01
661 659.24 Method of Measurement
659.25 Basis of Payment
659.01 Description. This work consists of placing topsoil, preparing the seed
bed, and placing and incorporating seed, agricultural lime, commercial fertilizer, and placing mulching material used to achieve NPDES final stabilization. Perform this work in areas shown on the p lans for seeding and mulching. Perform seeding and mulching after completing all work in the area and within 7 days of obtaining final grade. If it is anticipated that future work may disturb an area, place temporary NPDES compliant Best Management Practic es as needed until final stabilization measures under this item can be installed. If the Contractor disturbs a final area, then the Contractor shall restore this area. With the Engineer’s approval, the Contractor may apply permanent seed between October 30 and March 1 on projects started and completed within the same calendar year. Use all excavation material in the work. Alternatively legally use, recycle, or dispose of all excavated materials according to 105.16 and 105.17.
659.02 Testing of Soil or Topso il. When a Soil Analysis Test of the soil or
topsoil is required in the plans, use the following sampling frequency to determine the lime required:
A.When an area is near final grade, perform Standard Soil Analysis Test to measure the soil acidity or alka linity (pH) if no topsoil is to be placed. This testing will determine the soil requirements for lime. If the soil requirements are different than the standard lime mixture ratio application rates then the standard application rate shall be adjusted up or down such that the soil requirements are met. If liquid lime is used then use the following application table to achieve a pH of 6.5 or greater. Calculate the difference between the soil pH and 6.5 pH. pH Difference 0.25 0.50 0.75 1.0 Application rate in gals/ac (L/ha) 2.5 (4) 5 (8) 10 (15) 20 (30) Example: Soil Analysis Test pH=5.75 required pH=6.5 difference= 0.75 required application rate is 10 gals/ac (15L/ha) Only use liquid lime on the QPL list. Provide the Engineer with the Liquid Lime manufacturers written application rate. The Engineer will only accept printed application rates. There will be no change in the mixture ratio. The sampling frequency is one sample every 10 acres (4.0 ha) per project side or one sample per project side whic hever is greater. A sample consist of 15 soil cores in a random pattern spaced at a minimum of 500 feet (153 m) apart. Sample any change in soil. Soil changes can be seen as color and/or texture changes.
B.If placing topsoil, perform the Standard Soil Ana lysis Test from topsoil stockpiles to measure the topsoil acidity or alkalinity (pH). This testing will determine the soil requirements for lime. If the topsoil requirements are different than the standard lime mixture ratio application rates then the stan dard application rate shall be adjusted up or down such that the topsoil requirements are met. 659.03 662 If liquid lime is used then use the following application table to achieve a pH of 6.5 or greater. Calculate the difference between the soil pH and 6.5 pH. pH Difference 0.25 0.50 0.75 1.0 Application rate in gals/ac (L/ha) 2.5 (4) 5 (8) 10 (15) 20 (30) Example: Soil Analysis Test pH=5.75 required pH=6.5 difference= 0.75 required application rate is 10 gals/ac (15L/ha) Only use liquid lime on the QPL list. Provide the Engineer with the Liquid Lime manufacturers written application rate. The Engineer will only accept printed application rates. There will be no change in the mixture ratio. The sampling frequency is one sample every 10,000 cubic yards (7600 m3) of a topsoil stockpile, or at least two samples per stock pile whichever is greater. Test each stockpile. A sample consisting of 15 soil cores in a random pattern spaced evenly throughout the stockpile. Mix the 15 cores from each sample and then remove 1 pint (0.5 L) for testing. The Ohio County Extension offices can provide the Contractor with a soil sample kit and testing laboratory locations. The Department will review the sample test results and approve application rates for the standard mixture ratios provided by the Contractor. If a Soil Analysis Test of the soil is not required by the plans, use the standard application rates for lime and commercial fertilizer.
659.03 Lime. Obtain granular or liquid lime from a agricultural lime dealer or
manufacturer whose brands are grades registered or licensed by the State of Ohio, Department of Agriculture. The granular or liquid lime standard grade is Ag -ground 90+. Ag-ground 90+ is def ined as agricultural ground limestone, having a total neutralizing power (TNP) of 90 percent or more, at least 40 percent passing a No. 100 (150 m) sieve and 95 percent passing a No. 8 (2.36 mm) sieve. Test granular or liquid lime according to Supplement 1007. Apply the granular or liquid lime standard grade Ag -ground 90+ at the standard application rate of 92 pounds per 1000 square feet (2 tons per acre) [0.45 kg/m2 (9 metric tons/ha)]. The Contractor may provide other lime grade materials. The lime grade materials provided will meet Table 7 -10 “Equivalent Amounts of Liming Materials” found in Bulletin 472, Ohio Agronomy Guide , published by the Cooperative Extension Service, The Ohio State University. Based on the type of lime grade material provided, dete rmine the increase or decrease in the standard application rate from Table 7 -10 “Equivalent Amounts of Liming Materials” found in Bulletin 472, “Ohio Agronomy Guide”, published by the Cooperative Extension Service, The Ohio State University. If using liqui d lime apply liquid lime at a rate of 5 gals/acre (8 L/ha) unless otherwise required per the soil or topsoil Soil Analysis Test. Provide the Engineer with the Liquid Lime manufacturers written application rate. The Engineer will only accept printed applica tion rates. Only use Liquid lime on the QPL list. If testing of the soil or topsoil was performed, the lime required will be such that a growing environment of slightly acidic (pH 6.5) can be reached. The application rate of the standard grade lime Ag -ground 90+ will be adjusted up or down to 659.04 663 achieve this condition and reported to the Department for approval. No lime is required for the soil or topsoil if the test shows a slightly acidic condition.
659.04 Commercial Fertilizer. Obtain commercial fertilizer from a dealer or
manufacturer whose brands are grades registered or licensed by the State of Ohio, Department of Agriculture. Commercial fertilizer may be dry or liquid. Apply standard commercial fertilizer 10-20-10 evenly over the surface at a standard d ry application rate of 20 pounds per 1000 square feet (0.1 kg/m2). Furnish liquid application rates for approval by the Department. The Contractor may provide other commercial fertilizer mixture ratios, however, ensure that the ratio meets or exceeds the s tandard commercial fertilizer ratio of 10 - 20-10 by providing an application rate specific for that ratio. The Department will approve this application rate that is specific to that ratio provided by the Contractor. For areas of inter -seeding apply commerci al fertilizer 12 -12-12 over the affected area at the above rate. For commercial fertilizer second application the method, mixture, and rate is broadcast 12 -12-12 evenly over the surface without incorporation into the soil at a rate of 10 pounds per 1000 sq uare feet (0.05 kg/m2).
659.05 Topsoil. If placing topsoil as specified in the plan, then stockpile off
project site topsoil for testing and/or stockpile stripped topsoil from the project for testing. Perform the Soil Analysis Test from these stockpiles to determine the percent of organic matter present. The topsoil shall contain between 4 percent and 20 percent organic matter as determined by loss on ignition of samples oven dried to constant weight at 212 F (100 C) and consist of fertile, loose, friable , and loamy material that contains humus material. For topsoil to be considered loamy, ensure that the fraction passing the No. 10 (200) sieve does not contain more than 40 percent clay. Test topsoil according to AASHTO T 267. The Department will review th e sample test results and approve the stockpiles for use. Stockpiles outside the above limits will not be used. Stripped topsoil from the R/W limits will be from the upper most layers of the excavation areas. Remove all heavy grass, weeds, and other vegeta tion before stripping topsoil from the excavation areas. A mixture of 1 part compost and 2 parts topsoil will be treated as topsoil.
659.06 Compost. Acceptable compost shall include Ohio EPA rated Class IV
compost, EQS biosolids compost, or a Department ap proved equal. Furnish compost with a nitrogen content of 1.4 percent or above. Obtain compost from an Ohio EPA approved facility. Before delivering compost, provide the Engineer with the facility name and location.
659.07 Seeds. Furnish grass seed from a g rass seed dealer or grower whose
brands are grades registered or licensed by the State of Ohio, Department of Agriculture or from the approved list of grass seed dealers or growers on file with Department. Furnish the kind and type of grass seed required t hat meets current 659.08 664 specifications on file with the Department as to percentage purity, percentage weed seed, and percentage germination. Turf grass germination rates specifications are shown below in Table 659.07 -1 to provide an understanding of the specifi cations on file with the Department along with information to understand what is required. TABLE 659.07 -1 GERMINATION RATES Species Minimum Percent High Quality Percent Kentucky Bluegrass 80 85 Fine Fescue 85 90 Perennial Ryegrass 85 90 Annual Ryegrass 85 90 Tall Fescue 85 90 Creeping Red Fescue 85 90 If high quality is not shown on the plans, then the minimum germination rate is required. Mark the test date on seed bags. Furnish seeds as separate species and cultivars, packaged together or bagged separately, and labeled, tagged, or marked according to ORC 907.03. Sow seeds within 15 months of the testing date. The Department reserves the right to test, reject, or approve all seed after delivery.
659.08 Legumes. Inoculate or treat all leguminous se eds (crown vetch) with the
proper amount of pure nitrogen -fixing bacteria and mix with sufficient water to thoroughly wet the seed. The bacteria selected will be for maximum vitality and shall not be more than one -year old. All culture records will be prov ided with the leguminous seeds. If sown hydraulically, use 4 times the inoculant rate specified by the inoculant manufacturer. If pre -inoculated seed is used then use 3 times the inoculant rate specified by the inoculant manufacturer. Immediately before se eding, add inoculant and sticking agent directly into the slurry, and thoroughly mix the slurry. Sow seed as soon as possible after inoculation. If left standing for more than 24 hours, reinoculate seed before sowing. Mix all seed on the project. Sixty day s before seeding, provide a written description for the Class 3C mixture showing the percentage by weight (mass) of each kind of seed for the Engineer’s approval. Include the following with the description:
A.Name and location of the seed supplier.
B.Origin and date of harvest of each kind of seed.
C.A statement of the purity and germination of each seed.
D.Testing date for each seed.
E.How and when seeds were mixed.
659.09 Native Grasses and Wildflowers. Table 659.09 -1 lists the seed
quantities by wei ght per area. Use Classes 4, 5, and 6 in the amounts of pure live 659.09 665 seed (PLS) for each species listed. If seed tests show that the seed has an actual pure live seed (PLS) yield less than the intended yield, adjust the specified quantity to provide the inten ded PLS yields. For Class 4, 5, and 6 mixtures, provide seed specifically grown for the Ohio climate. Use cool season turf Classes 1, 2, 3A, and 3B as listed in Table 659.09 -1 composed of no less than two and no more than four cultivars of the same species . Sixty days before seeding, provide a written description for the Class 1, 2, and 3A mixtures showing the percentage by weight (mass) of each kind of seed for the Engineer’s approval. Mix all seed on the project. Sixty days before seeding, provide a writt en description for the Classes 1, 2, 3A, 3B, 4, 5, and 6 mixtures showing the percentage by weight (mass) of each kind of seed for the Engineer’s approval. Include the following with the description:
A.Name and location of the seed supplier.
B.Origin and date of harvest of each kind of seed.
C.A statement of the purity and germination of each seed.
D.Testing date for each seed.
E.How and when seeds were mixed. TABLE 659.09 -1 GRASS AND WILDFLOWER SEED MIXES Class Mix Type Seeds Weight per Area lb kg 1000 ft2 1000 m2 1 Lawn Mixture Use for areas in front of residences, commercial properties, etc. between curb and sidewalk with slopes 3:1 or flatter. Kentucky Bluegrass (Poa pratensis) 3 14.64 Creeping Red Fescue (Festuca rubra) 3 14.64 Annual Ryegrass (Lolium multiflorum) 2 9.76 Perennial Ryegrass, turf type (Lolium perenne) 2 9.76 2 Roadside Mixture Kentucky Bluegrass (Poa pratensis) 1.5 7.32 Kentucky 31 Fescue (Festuca arundinacea var. KY 31 or Fawn Tall Fescue) 2 9.76 Perennial Ryegrass (Lolium perenne) 1.5 7.32 3A Slope Mixtures Use for slopes flatter than or equal to 3:1. Use Class 2, 3B, 3C, or 4B mixtures 3B Low Growing Slope Mixture Use for slopes steeper than 3:1 when low growing species are required Hard Fescue (Festuca longifolia) 1.3 6.35 Creeping Red Fescue (Festuca rubra) 0.8 3.9 Annual Ryegrass (Lolium multiflorum) 0.23 1.12 659.09 666 Class Mix Type Seeds Weight per Area lb kg 1000 ft2 1000 m2 3C Crown Vetch Mixture Use for slopes steeper than 3:1 and shale or rock slopes. Crown Vetch (Coronilla varia) 0.9 4.39 Perennial Ryegrass (Lolium perenne) 1.8 8.79 Annual Ryegrass (Lolium multiflorum) 0.3 1.46 4A Native Grass Mixture Use for slopes flatter than 2:1 and seeding for wildlife habitat mitigation. Big Bluestem (Andropogon gerardii) 0.07 0.34 Indiangrass (Sorghastrum nutans) 0.09 0.44 Switchgrass (Panicum virgatum) 0.02 0.09 Annual Ryegrass (Lolium multiflorum) spring fall 0.11 0.34 0.54 1.66 4B Low Growing Native Grass Mixture Use for slopes flatter than 2:1 and seeding for wildlife habitat mitigation when low growing species are required. Little Bluestem (Schizachyrium scoparium) 0.18 0.88 Sideoats Grama (Bouteloua curtipendula) 0.04 0.19 Prairie Dropseed (Sporobolus heterolepis) 0.04 0.19 Annual Ryegrass (Lolium multiflorum) spring fall 0.11 0.34 0.54 1.66 5A Annual and Perennial Wildflower Mixture Use for slopes flatter than 2:1 and seeding for wildlife habitat mitigation. Annual Mixture Do not exceed 25% by weight of any one of the following species: 0.07 0.34 Corn Poppy (Papaver rhoeas) Cosmos (Cosmos bipinnatus) Yellow Cosmos (Cosmos sulphureus) Cornflower (Centaurea cyanus) Rocket Larkspur (Delphinium ajacis) Indian Blanket (Gaillardia pulchella) Perennial Wildflower Mixture Do not exceed 50% by weight PLS of any one of the following species: 0.28 1.37 Black -eyed Susan (Rudbekia hirta) Purple Coneflower (Echinacea purpurea) Lance -leaved Coreopsis (Coreopsis lanceolata) 5B Native Wildflower and Grass Mixture Use for slopes flatter than 2:1 and seeding for wildlife habitat mitigation. Native Wildflower Mixture Do not exceed 10% by weight PLS of any one of the following species: 0.34 1.66 Butterfly -weed (Asclepias tuberosa) 659.10 667 Class Mix Type Seeds Weight per Area lb kg 1000 ft2 1000 m2 New England Aster (Aster novae -angliae) Partridge Pea (Cassia fasciculata) Purple Coneflower (Echinacea purpurea) Rattlesnake Master (Eryngium yuccifolium) Ox-eye Sunflower (Heliopsis helianthoides) Wild Bergamot (Monarda fistulosa) Greyhead Coneflower (Ratibida pinnata) Orange Coneflower (Rudbekia fulgida) Prairie Dock (Silphium terebinthinaceum) Whorled Rosinweed (Silphium trifoliatum) Stiff Goldenrod (Solidago rigida) Grass Mixture Big Bluestem (Andropogon gerardii) 0.046 0.22 Little Bluestem (Schizachyrium scoparium) 0.069 0.34 Indiangrass (Sorghastrum nutans) 0.023 0.11 Annual Ryegrass (Lolium multiflorum) 0.92 4.49 6 Wildlife Mixture Use for slopes flatter than 2:1 and seeding for wildlife habitat mitigation. Big Bluestem (Andropogon gerardii) 0.13 0.63 Little Bluestem (Schizachyrium scoparium) 0.18 0.88 Indiangrass (Sorghastrum nutans) 0.13 0.63 Ox-eye Sunflower (Heliopsis helianthoides) 0.18 0.88 Prairie Dock (Silphium terebinthinaceum) 0.18 0.88 Purple Coneflower (Echinacea purpurea) 0.18 0.88 Whorled Rosinweed (Silphium trifoliatum) 0.11 0.54 Downy Sunflower (Helianthus mollis) 0.07 0.34 New England Aster (Aster novae -angliae) 0.07 0.34 Annual Ryegrass (Lolium multiflorum) spring fall 0.11 0.34 0.54 1.66 7 Temporary Erosion Control Mixture Annual Ryegrass (Lolium multiflorum) 2.02 9.86
659.10 Site Preparation. Before placing topsoil or seed remove rock or other
foreign material of 3 inches (75 mm) or greater in any dimension, from all areas except as listed below.
A.Remove stones 1 -inch (25 mm) or greater in any dimension from all seed areas from in front of residences, commercial properties, etc.; between curb and sidewalks; or as shown on the plans.
B.Remove nothing in shale cuts, but allow the shale to deteriorate to a soil type surface before seeding or placing topsoil. Finish the area in such a manner that seeding, place sod, planting, or, placing topsoil c an proceed without additional soil preparation. 659.11 668 Apply commercial fertilizer, lime, or other soil amendments including compost to the soil or topsoil surface in separate operations. Incorporate the commercial fertilizer, granular lime, or other soil amendme nts, including compost either separately or together, into the soil or topsoil to a depth of 2 to 4 inches (50 to 100 mm). Do not mix Liquid lime into the soil or topsoil. Only apply liquid lime to the top of the soil or topsoil. Furnish a smooth surface f or the seed or topsoil by tracking with a dozer or by other methods. If the site is inaccessible to a dozer and other methods do not provide results equivalent to hand raking, hand rake these areas. Ensure that the surface is uniform, free of gullies, rivu lets, crusting, and caking. Finely grade the surface for seed or topsoil for slopes 4:1 or flatter, and grade all other slopes. Rake or open the surface with a dozer cleats or otherwise loosen the surface of these areas to a depth of 1 inch (25 mm) immediately before covering with topsoil. Remove raked up material from the area.
659.11 Placing Topsoil. If shown on the plans, place topsoil in loose lifts that
construct a 4 -inch (100 mm) compacted depth. The surface of the topsoil shall be such that th e final grade as shown on the cross -sections is met. Use the following methods or combination of any of the methods to produce the required space to place the topsoil.
A.The 203 Items can be cut or placed to the final grade, which will match the plan quan tities for Items 203, and then remove a 4 -inch (100 mm) thickness for the topsoil.
B.The 203 Items can be cut or placed to a 4 -inch (100 mm) height below the final grade. There will be no change from the plan quantities in the 203 Items for this method. Track the area with a dozer to compact and provide good contact between the topsoil and the surface. The Contractor may place topsoil by using pneumatic, or hydraulic methods. If using pneumatic or hydraulic methods to place the topsoil, the Contractor may place the top 1 -inch (25 mm) with a mix of seed, commercial fertilizer, lime, and other soils amendments. This mixture will be 1 part compost and 2 parts topsoil. Do not apply mulch to this surface. The compost is the mulch.
659.12 Seeding Methods. Apply s eed to prepared areas. If the prepared areas to
be seeded become compacted before seeding, loosen the surface using disks, rakes, or other methods. Thoroughly mix all seed, and evenly sow the seed over the prepared areas at the required rates. Do not sow s eed during high winds. For slopes subject to windy conditions, seed using hydraulic methods only. Operate equipment in a manner to ensure complete coverage of the entire area to be seeded. If broadcast seeding, seed Classes 1, 2, 3A, and 3B between August 15 to October
30.If necessary to seed Classes 1, 2, 3A, or 3B before August 15, but after March 1 increase the seeding rates by 5 percent. Between March 1 and October 30, the Contractor may use hydro seeding, which applies the mulch, seed, water, and commercial fertilizer in the same operation, for Classes 1, 2, 3A, 3B, 3C, and 7. 659.13 669 Between October 30 and March 1, apply temporary seed according to Item SS832. With the Engineer’s approval, the Contractor may apply permanent seed between October 30 and Mar ch 1 on projects started and completed within the same calendar year. Seed before or concurrently with all required erosion control items. Do not apply crown vetch seed from September 1 to October 31. Wildflower Classes 5 and 6 seed from September 1to Octo ber 30, unless the Engineer allows seeding from March 1 to May 31. Seed Class 4 wildflowers from March 1 to May 31. Seed native grasses and wildflowers in Classes 4, 5, and 6 with a rangeland type, slit seeder or native seed grass drill. Seed native grasse s with no less than two passes in different directions and by equally splitting the seed application rate to each pass. Use broadcast seeding, along with cultipacking or rolling, only with the Engineer’s approval. If broadcast seeding, perform the followin g, immediately after sowing, to provide good seed -soil contact:
A.For flat surfaces, lightly rake the area then roll.
B.For slopes, track the area with a dozer.
659.13 Mulching Operation. Mulch materials consist of straw, compost, or
wood fiber for 3:1 o r flatter slopes. The Contractor may specify which mulch to use, if it is not shown on the plans. Use mulch that is reasonably free of weed seed, foreign materials, or other materials that would prohibit seed germination. Do not mulch during high winds. For slopes subject to windy conditions mulch using hydraulic methods only. Within 24 hours after seeding an area, evenly place mulch. Immediately replace mulch that becomes displaced.
659.14 Straw Mulch. Straw mulch consists of straw. Evenly place straw mul ch
over all seeded areas at the following rates: Seeding Period Rate From March 15 to October 30 2 tons per acre (0.5 metric ton/1000 m2) From October 31 to March 14 3 tons per acre (0.7 metric ton/1000 m2) Keep straw mulching materials in place by applying an asphalt emulsion at a minimum rate of 60 gallons per ton (250 L/metric ton) of straw mulch or by applying tackifiers according to the manufacturer’s recommendations. Apply an additional application at a rate of 30 gallons per ton (125 L/metric ton) of straw mulch to shoulder areas, starting at the berm edge and extending out for a distance of 10 feet (3 m). Use an emulsion that is nontoxic to plants and prepared in a manner that will not change during transportation or storage.
659.15 Wood Fiber Mulch. Wood fiber mulch consists of pure wood fibers
manufactured expressly from clean wood chips. Ensure that the chips do not contain lead paint, varnish, printing ink, and petroleum based compounds. Do not use wood fiber mulch manufactured from recycle d materials of unknown origin such as sawdust, paper, cardboard, or residue from chlorine -bleached pulp and paper mills. 659.16 670 Ensure that the wood fiber mulch maintains uniform suspension in water under agitation and blends with grass seed, commercial fertilize r, and other additives to form a homogeneous slurry. Use manufacturer -approved tackifiers. Using standard hydraulic mulching equipment, evenly apply the slurry over the soil surface in a one -step operation. Apply slurry from March 1 to October 30 at the following rates: Surface Rate Slopes 3:1 or flatter 46 pounds per 1000 square feet (225 kg/1000 m2)
659.16 Compost Mulch. The Contractor may provide compost applied to a
minimum depth of 1/4 -inch (6 mm) over the prepared seed areas. The Contractor may also mix the grass seed with the compost and using pneumatic equipment, place this mixture to a minimum depth of 1/4 -inch (6 mm) over the prepared seed areas. If using compost no tackifiers or asphalt emulsion are required.
659.17 Watering. Thoroughly wate r all permanent seeded areas (Classes 1 to 6)
after the seed has germinated. Apply a total rate of 300 gallons per 1000 square feet (12.2 m3/1000 m2) in at least 2 applications spread over 7 days. Apply the water using a hydro -seeder or a water tank under pressure with a nozzle that produces a spray that will not dislodge the mulch material. Perform a secondary water application between 7 and 10 days after the primary applications. If 1/2 -inch (13 mm) or greater of rainfall has occurred within the first 7-day period, the Contractor may delay or omit the secondary application, depending on weather conditions.
659.18 Maintenance. Maintain all seeded and mulched areas until final
inspection. Repair damaged areas to the original condition and grade.
659.19 Mowin g. The Engineer may require mowing before permanent seeding
and during the growing season following permanent seeding. The Engineer will notify the Contractor of when to begin each mowing. Use suitable mowing equipment of the rotary, flail, disk, or sickle type. Use handheld equipment where inacessible by larger equipment. Do not bunch or windrow mowed vegetation. Mow to a final cutting height of no less than 6 inches (150 mm). If necessary to achieve the cutting height, make more than one pass with the mow er.
659.20 Repair Seeding and Mulching. Repair all damage or erosion of the
seeded and mulched areas before the completion of the project. Rework or reshape slopes, and bring in additional material, as necessary, using whatever equipment is necessary to re store slopes to grade. Seed and mulch repaired areas according to this specification. As an alternative, the Contractor may apply compost to repair areas as specified in Item 659.
659.21 Inter -Seeding. Inter -seeding is seeding existing thin and spotty grow ing
turf using a slit or drill type seeder. Perform inter -seeding only from March 15 to May 15 and from September 1 to October 15. If necessary to achieve good seed -soil contact, mow before seeding according to Item 659. For seeding steep slopes or inacces sible areas, the Contractor may use broadcast or hydraulic seeding methods. Broadcast commercial fertilizer over affected areas 659.22 671 as specified in Item 659. Water affected areas at the rate specified in 659 to aid in seed-soil contact.
659.22 Fertilization: 2nd Application. Once all repair seeding and mulching,
and inter -seeding is complete and no earlier than 3 months after seeding, perform a Soil Analysis Test if shown on the plans to determine the need for a second application of commercial fertilizer. Do not apply the second application of commercial fertilizer unless the grass has germinated. Broadcast commercial fertilizer of 12 -12-12 evenly over the surface without incorporation at a rate of 10 pounds per 1000 square feet (0.05 kg/m2).
659.23 Performanc e. The Department will inspect all seeded areas no earlier
than 6 months and no later than 12 months after final seeding. For any area identified without a uniform density of at least 70 percent grass cover, repair seeding and mulching as specified in 659 or perform inter -seeding as specified in 659, and fertilize as specified in this subsection. Also repair seeding and mulching or perform inter -seeding, and fertilize seeded areas damaged by traffic or erosion, due to no fault or negligence of the Contracto r.
659.24 Method of Measurement. The Department will measure Soil Analysis
Test by the number of tests submitted to the Engineer. The Department will measure the compacted topsoil by the number of cubic yards (cubic meters). The Department will measure Commercial Fertilizer by the number of tons (kilograms) of each quantity of furnished, spread, and incorporated into the soil or topsoil. This measure will be converted to the standard application rate for the standard mixture ratio. The Department will m easure lime or liquid lime by the number of acres (ha) furnished, spread, and incorporated into the soil or topsoil. The measure will be converted to the standard application rate for the standard mixture ratio. The Department will measure Seeding and Mulc hing by the number of square yards (square meters). The Department will measure Repair Seeding and Mulching by the number of square yards (square meters) of damaged or eroded areas reshaped, seeded, and mulched. If compost is substituted for mulch to repai r areas, the Department will include such work under Repair Seeding and Mulching. The Department will measure Water by the number of M gallons or 1000 gallon units (cubic meters) applied. The Department will measure water in tanks, tank wagons, or trucks o f predetermined capacity, or by means of meters of a type satisfactory to the Engineer and furnished and installed by the Contractor at expense to the Department, or determined by weight conversion. The Department will measure Inter -Seeding by the number o f square yards (square meters) of the seeded area. The Department will measure mowing by the number of M square feet (square meters) satisfactorily mowed. 659.25 672 If seeded areas are damaged by traffic or erosion, due to no fault or negligence of the Contractor, t he Department will measure for such work and mobilization by Supplemental Agreement. The Department will not measure for repairs to seeding and mulching if damage or erosion of the areas occurs as a result of fault or negligence of the Contractor.
659.25 Basis of Payment.
The Department will pay the plan quantity for compacted topsoil. The Department will not adjust topsoil quantities when the volume between two consecutive cross -sections differs by less than 5 percent from the plan quantity, unless the di fference between the actual quantity and plan quantity is greater than 1000 cubic yards (1000 m³). For quantity differences greater than 5 percent or greater than 1000 cubic yards (1000 m³), submit supporting documentation to the Engineer. The Department w ill pay the plan quantity for Seeding and Mulching. The Department will not adjust Seeding and Mulching quantities when the area between two consecutive cross -sections differs by less than 5 percent from the plan quantity, unless the difference between the actual quantity and plan quantity is greater than 20,000 square yards (20,000 m²) for all Seeding and Mulching pay items, combined. For quantity differences greater than 5 percent or greater than 20,000 square yards (20,000 m²), submit supporting document ation to the Engineer. The Department will pay for accepted quantities at the contract prices as follows (M=1000): Item Unit Description 659 Each Soil Analysis Test 659 Cubic Yard Topsoil (Cubic Meter) 659 Ton (Kilogram) Commercial Fertilizer 659 Acres ( ha) Lime 659 Square Yard Seeding and Mulching (Square Meter) 659 Square Yard Seeding and Mulching for Wildlife (Square Meter) 659 Square Yard Seeding and Mulching Class ___ (Square Meter) 659 Square Yard Repair Seeding and Mulching (Square Mete r) 659 M Gallons Water (Cubic Meters) 659 Square Yard Inter -Seeding (Square Meter) 659 M Square Feet Mowing (Square Meter)
Source: Ohio Construction and Material Specifications, 2019 Edition. Pages 0–0 of 928.