654.05 Basis of Payment.
vegetation regardless of the methods used for planting and establishment. Vegetatio n established outside of the normal planting season (annual ryegrass) will be paid for at the contract price for seeding. Vegetation established by seeding in stubble will also be paid for at the contract unit price for seeding. All mowing, cutting and tr imming, including mowing required for seeding in stubble will be paid for at the contract unit price bid per acre {hectare} which shall be payment in full for the mowing including equipment, labor, and incidentals necessary to complete this item of work. The contract unit price shall also be for mowing required when the vegetation becomes a hazard to motorists and as necessary to promote growth of the required permanent vegetation.
b.Payment will be made under Item No .: 652-A Seeding - per acre {hectare } 652-C Mowing - per acre {hectare} SOLID SODDING
654.01 Description.
This Section shall cover the work of furnishing solid grass sodding in designated locations throughout the construction limits of the work. Basic work consists of ground preparation, furnishing and placing required soil amendments, and furnishing and inst alling sod and maintenance of the sod including watering of the sod for the life of the contract.
654.02 Materials.
All materials shall conform to the requirements of Article 860.05. A list of acceptable mulch control netting products (LIST II -20, “TACKIFIERS, MULCH CONTROL NETTING, AND HYDRAULIC MULCH PRODUCTS”) is given in the ALDOT manual titled “Materials, Sources, and Devices with Special Acceptance Requirements”.
654.03 Construction Requirements.
Areas to receive sod shall be prepared in accordance with the requirements for planting vegetation in soft soil given in Section 652. The requirements for ground preparation and the application of initial and final amendments to the soil shall apply to this work. The sod shall be placed on the prepared and amended soil with no gaps between the individual sod pieces or rolls . The entire sodded area shall be rolled with a weighted roller to set each piece of sod into the topsoil. Staking or stapling of sod is required on slopes 3:1 or steeper and all chan nel applications and shall be done without additional compensation. When required by the plans, mulch control netting shall be applied in accordance with Section 656 and shall be a subsidiary obligation . The Contractor shall water, fill washes, and otherwise protect and maintain all sodded areas until the contract is accepted for maintenance or until the bond is released if a bond was required. Payment will not be made for areas of unsatisfactory stands of vegetative cover, the repair of areas damaged by the Contractor, or for the repair of washes in areas where sufficient erosion control measures are available to the Contractor. Requests from the Contractor for payment for areas of unsatisfactory sod will not be considered without the submittal of documen tation of absolute adherence to the requirements for the establishment of the solid sodding. The requirements given in Section 652 shall apply to the determination of a satisfactory installation of solid sod except that a 95 % living coverage will be requi red.
654.04 Method of Measurement.
Solid Sodding will be measured in square yards {square meters} from measurements made parallel to the surface of the area covered by the sod.
654.05 Basis of Payment.
a.Unit Price Coverage . Solid Sodding will be paid fo r at the contract unit price, which price shall be full compensation for furnishing the sod, ground preparation, planting, soil amendments, rolling, watering, and maintaining the sod until acceptance of the contract, and for all other materials, equipment, tools, and labor
656.01 Description.
necessary to complete the work. Additional fertilizer or agricultural limestone ordered by the Engineer will be paid at the verified invoice price plus 15 percent.
b.Payment will be made under Item No .: 654-A Solid Sodding - per square yard {square meter} SECTION 656 MULCHING FOR VEGETATION ESTABLISHMENT
656.01 Description.
This Section shall cover the work of furnishing and placing mulching materials over the soil surface to provide protection from soil erosion and to aid in retention of soil moisture for vegetation establishment.
656.02 Materials.
Mulch materials shall be furnished in compliance with the requirements given in Article 860.03. A list of acceptable Hydraulic Mulch pro ducts, Mulch Control Netting and Tackifiers (List II -20, “TACKIFIERS, MULCH CONTROL NETTING, AND HYDRAULIC MULCH PRODUCTS”) is given in the ALDOT manual titled “Materials, Sources, and Devices with Special Acceptance Requirements”.
656.03 Construction Requ irements.
a.Mulching Operations . Seeded areas shall be covered with mulch within 48 hours after seeding. Mulch shall be applied at the rates required below for the type of mulch used. Mulch shall be furnished to effectively control erosion and promote th e establishment of vegetation. Dry blown mulch shall be stabilized by crimping, by the application of a tackifier adhesive, or by anchoring with a mulch control netting, with the following exceptions: crimping shall only be allowed on slopes 3:1 or flatter , and tackifier adhesive shall be required for applications within 10 feet {3 meters} of traffic. During crimping operations, care shall be taken to follow as closely as possible to the contours of the mulched surface. Crimping shall result in the mulch be ing securely lodged into the soil providing both erosion protection and promotion of vegetation establishment. Tackifier adhesive shall be applied at the rate recommended by the manufacturer. Hydraulic Mulch products shall be applied in accordance with man ufacturer recommendations, typically in opposing directions to provide a solid blanket of mulch product. Hydraulic Mulches may be used within 10 feet {3 meters} of traffic as an alternate to dry blown mulch with tackifier adhesive. Hydraulic Mulches and ta ckifiers shall not be installed in areas subject to channelized flow or areas having a potential to flood during a local 2 year, 24 hour storm event.
b.Rate of Mulch Application . Dry blown mulch shall be applied at a rate of not less than 2 tons per acre {4500 kg/ha}. Proof of material weight shall be provided to the Engineer by the Contractor upon delivery of the materials to the project site. The weight ticket shall contain all items required in Item 109.01(h)2. with the exception of the name of the pro ducer and the truck number. Hydraulic Mulch products shall be applied at the rate designated by the manufacturer for the specific slope where they are being applied to provide a solid blanket of the mulch product with no soil showing. In no case shall the applied rate be less than 1 ton per acre {2250 kg/ha} for hydraulically applied mulches. The application rate will be verified by using the air dry weight {mass} per pound {kilogram} and dividing by the surface dimensions of the area covered.
c.Equipment . Dry blown mulch shall be applied with a mechanical mulch spreader designed to break up balls or clusters of mulch. If a tackifier adhesive is used to secure the mulch, the mulch spreader shall be equipped to apply the adhesive effectively to the mulch to form a uniform, porous and stable mulch blanket held in place by the adhesive. The adhesive may also be applied hydraulically after mulch application. Crimpers shall be roller -type devices equipped with flat, uncupped, dull edged disks. The disks shall have a minimum width of 1/4 of an inch {6 mm} and shall be placed a maximum of 8 inches {200
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 552–552 of 934.