Section 225 Section 225
225.04 Method of Measurement. Grassing will be measured by the acre. Acceptance
will be based on a satisfactory growth and coverage of seeds planted. Acceptable quantities of agricultural limestone will be measured by the ton. Acceptable quantities for mulch will be measured by the ton. For vegetative mulch, the weight for measurement will be the product of the number of bales acceptably placed and the average weight per bale as determined on approved scales provided by the Contractor. Anchoring of vegetative mulch will not be measured for separate payment. The cost of anchoring shall be absorbed in the prices bid for other items of work. For hydromulch, the weight for measurement will be the dry weight of the packaged fibers used in the mixture. No payment will be allowed for water, additives, tackifier, or other liquids used in the mixture.
225.05 Basis of Payment. Grassing, measured as prescribed above, will be paid for at
the contract unit price per acre, which will be full compensation for all required materials including seeding and fertilizers other than limestone, ground preparation, equipment, labor, testing and all work necessary to establish a satisfactory growth of grass. Hard rock agricultural limestone will be paid for at the contract unit price per ton. Hard rock agricultural limestone with a relative neutralizing value (RNV), determined in accordance with Subsection 715.02.2.1.3, of between 60.0% and 62.9% will be paid for at half (½) the contract unit price per ton. No payment will be made for hard rock agricultural limestone with an RNV less than 60.0%. Mulch, measured as prescribed above, will be paid for at the contract unit price per ton, which price shall be full compensation for all ma terials, equipment, labor, and incidentals necessary to complete the work. Payment will be made under: 225-A: Grassing - per acre 225-B: Agricultural Limestone - per ton 225-C: Mulch, Vegetative Mulch - per ton 225-D: Mulch, Hydromulch - per ton SECTION 226 - TEMPORARY GRASSING 226.0l--Description. This work consists of furnishing, transporting, placing, plant establishment and all work necessary to produce rapid-growing grasses, grains or legumes to provide an initial, temporary cover of grass. This work includes ground preparation, fertilizing, seeding and mulching necessary to establish a satisfactory growth of temporary grass. The Contractor may elect to place temporary grassing using the hydroseeding method as set out in Section 227. The Engineer or the plans will designate areas to be temporarily grassed. Any other areas the Contractor desires to grass will be measur ed for payment only if agreed upon by the Engineer.
226.02 Materials.
226.02.1 Fertilizers . Fertilizers for purposes of these specifications shall be understood
to include standard manufactured products consisting of a combination of ingredients. All fertilizer shall comply with the Stat e fertilizer laws and Subsection 715.02. Agricultural limestone will not be required for temporary grassing.
226.02.2 Seeds. Seeds shall meet the requirements of Subsection 715.03, subject to the
provisions of this subsection. The Contractor shall acquire seed from persons registered with the MDAC. Except for the germination requirements, bags of seeds properly labeled or tagged according to law and indicating characteristics meeting or exceeding the requirements of Subsection 715.03 will be acceptable for planting. The Contractor should provide adequate dry storage facilities for seeds, and shall furnish access to the storage for sampling stored seed.
226.02.3 Mulching. The vegetative materials for mulch shall meet the requirements of
Subsection 715.05. When used, bituminous material for mulch shall be Emulsified Asphalt, Grade SS-1, meeting the requirement of Subsection 702.07.
226.03 Construction Requirements. The rates of application shall not exceed the rates
shown on the temporary vegetation schedule, unless otherwise approved by the Engineer. Any unauthorized overage due to increased application rates will not be measured for payment. 226.03.1--Ground Preparation. Any equipment used for ground preparation shall be approved units suitable to perform the work and subject to the requirements of Subsection 108.05. Light ground preparation should be used on areas where seeding is required. Light ground preparation consists of scratc hing the surface with a close-tooth harrow, disk-harrow, or similar equipment. The depth of scratching should be at least three-quarters inch but not deep enough to damage existing grasses of the type being planted. Aerating, moistening, or otherwise bringing the soil to a suitable condition for ground preparation shall be considered as incidental to the work and will not be measured for separate payment.
226.03.2 Fertilizing . The Contractor shall furnish all equipment necessary to properly
handle, store, uniformly spread, and incorpor ate the specified application of fertilizer. The Contractor shall incorporate 13-13-13 co mmercial fertilizer at the rate shown in the vegetation schedule in the plans. The equivalent rate of other type fertilizers will be allowed if the equivalent percentages of Nitrogen, Phosphorus and Potassium are obtained. Fertilization shall be applied uniformly on the areas to be seeded and uniformly incorporated into the soil. Fertilizer should be applied on individu al areas of not more than three acres. All fertilizer should be incorporated within 24 hours following spreading.
226.03.3 Seeding.
226.03.3 1--General . Prior to planting the seeds, ground preparation and fertilizing
should have been satisfactorily performed. The required type of seeds, recommended rates of application and recommended planting dates of seeds are shown in the vegetation schedule in the plans. It is the Contractor’s responsibility to appl y an ample amount of each type of seed to produce a satisfactory growth of grass and of the seed type required. Legume seeds should be tr eated in accordance with Subs ection 715.03.4 immediately before sowing. Seeds should be uniforml y sown over the entire area with mechanical seeders. Seeds of different sizes may necess itate separate sowing. When legume seeds become dry, they should be reinoculated. Seeding should not be done during windy weather or when the ground is frozen, extremely wet, or in an untillable condition. All seeds should be covered lightly with soil by raking, rolling, or other approved methods, and the area compacted with a cultipacker.
226.03.3 2--Plant Establishment. Plant establishment shall consist of preserving,
protecting, watering, reseeding, and other wo rk necessary to keep the seeded areas in satisfactory condition. Areas requiring reseeding should be prepared and seeded and all other work performed as if the reseeding was the initial seeding. The types and application rates of fertilizer will be at the discretion of the Contractor. No additional measurement and payment will be made for re-seeding when payment was made for the initial seeding.
226.03.3 3--Growth and Coverage. It shall be the Contractor's responsibility to provide
satisfactory growth and coverage of grasses, legumes, or combination produced from the specified seeding. Growth and coverage on seeded areas will be considered to be in reasonably close conformity with the intent of the contract when the type of vegetation specified, exclusive of that from seeds not expected to have germinated and shows growth at that time, has reached a point of maturity wh ere stems or runners overlap adjacent similar growth in each direction over the entire area.
226.03.4 Mulching.
226.03.4 1--Equipment. Mulching equipment should be capable of maintaining a
constant air stream that will blow or eject controlled quantities of mulch in a uniform pattern. If asphalt is used, a jet or spray nozzle for applying uniform, controlled amounts of asphalt to the vegetative material as it is ejected should be located at or near the discharge spout. Mulch stabilizers should consist of dull blades or disks without camber and approximately 20 inches in diameter. The disks should be notched, should be spaced at approximately 8-inch intervals, and should be equipped with scrapers. The stabilizer should weigh approximately 1000 to 1200 pounds, should have a working width of no more than eight feet, and should be equipped with a ballast compartment, so that weight can be increased.
226.03.4 2--Placement of Vegetative Mulch . If required, mulching should be placed
uniformly on designated areas within 24 hours following seeding unless weather conditions are such that mulching cannot be performed. Placement should begin on the windward side of areas and from tops of slopes. In its final position, the mulch should be loose enough to allow air to circulate but compact enough to partially shade the ground and reduce erosion. The baled material should be loosened and broken thoroughly before it is fed into the machine to avoid placemen t of unbroken clumps.
226.03.4 3--Rates of Application and Anchoring Mulch . The recommended rate of
application of vegetative mulch shall be as shown in the vegetation schedule in the plans. The mulch should be anchored by either the use of a mulch stabilizer or by tacking with bituminous material. If a mulch stabilizer is used, the mulch should be punched into the soil for a minimum depth of one inch. If bituminous material is used, the rate of application should be 150 gallons per acre. Where steep slopes or other conditions are such that anchoring cannot be performed satisfactory with a mulch stabilizer, the Contractor may elect to use bituminous material applied at the time or immediately following the mulch placement. When mulch stabilizers are used, anchoring the mulch should be performed along the contour of the ground surface.
226.03.4 4--Protection and Maintenance . The Contractor should take every precaution
to prevent unnecessary foot and vehicular traffic.
226.03.5 Vegetation Schedule. When a temporary vegetation schedule is not shown in
the plans or when the contract does not ha ve an official set of plans, the following application rates shall be used, unless otherwise noted or approved by the Engineer. Spring & Summer Browntop Millet .............. 20 pounds per acre .... April 1 to August 31 Fall & Winter Rye Grass.......................... 25 pounds per acre .... September 1 to March 31 Oats .................................. 90 pounds per acre .... September 1 to December 15 13-13-13 Commercial Fertilizer ..... 250 pounds per acre Vegetative Mulch ........................... 2 tons per acre 226.04--Method of Measurement . Temporary grassing will be measured by the acre. Acceptance will be based on a satisfactory gr owth and coverage of seeds planted.
226.05 Basis of Payment . Temporary grassing, measured as prescribed above, will be
paid for at the contract unit price per acre, which will be full compensation for all required materials, equipment, labor, tes ting and all work necessary to establish a satisfactory growth of grass. Payment will be made under: 226-A: Temporary Grassing - per acre SECTION 227 - HYDROSEEDING 227.0l--Description. This work consists of furnishing, transporting, placing, plant establishment and all work necessary to pro duce a satisfactory and acceptable growth of grass. The seeds, fertilizers, tackifier, and mulch shall be incorporated using the hydroseeding process. These items shall be combined into a mixtur e and force-applied to the areas to be grassed.
227.02 Materials. The Contractor shall, prior to ap plication, furnish the Engineer with
invoices of all materials used in the grassing operation.
227.02.1 Fertilizers . Fertilizers for purposes of these specifications shall be understood
to include standard manufactured products consisting of single or combination ingredients. All fertilizers shall comply with the Stat e fertilizer laws and Subsection 715.02.
227.02.2 Seeds. Seeds shall meet the requirements of Subsection 715.03, subject to the
provisions of this subsection. The Contractor shall acquire seed from persons registered with the MDAC. Except for the germination requirements, bags of seeds properly labeled or tagged according to law and indicating characteristics meeting or exceeding the requirements of Subsection 715.03 will be acceptable for planting. The Contractor should provide adequate dry storage facilities for seeds, and shall furnish access to the storage for sampling stored seed.