654SOLID SODDING

549

652-A Seeding - per acre {hectare} 652-C Mowing - per acre {hectare} SOLID SODDING

654.01Description

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 installing sod and maintenance of the sod including watering of the sod for the life of the contract.

654.02Materials

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’s MSDSAR manual.

654.03Construction Requirements

The installation of sod shall be performed by or under the direct supervision of a licensed applicator in the area of Horticulture Professional Service for Setting of Landscape Plants. 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. Rolled and rectangular sod pieces shall be placed long edge perpendicular to the flow of water 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 channel applications. The stapling shall also occur at the transition overlaps and shall be placed through both abutting pieces of sod. When required by the plans, mulch control netting shall be applied in accordance with Section 656 and shall be a subsidiary obligation. The Contractor should water the sod immediately after installation, and the sod shall receive approximately 1.5 inches of rainfall or irrigation per week during the Summer or 1 inch of rainfall or irrigation per week during the Spring and Fall. Dormant sod laid during the Winter requires less frequent rainfall or irrigation, but the sod shall be watered prior to a hard freeze in a dry or drought state to protect the root bed. The Contractor shall also 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 documentation 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 required.

654.04Method 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.

654.05Basis of Payment

Solid Sodding will be paid for at the contract unit price, which price shall be full compensation for furnishing the sod, ground preparation, planting, staking or staples, soil amendments, rolling, watering, and maintaining the sod until acceptance of the contract, and for all other materials, equipment, tools, and labor 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.

654-A Solid Sodding - per square yard {square meter} MULCHING FOR VEGETATION ESTABLISHMENT 550

MULCHING FOR VEGETATION ESTABLISHMENT

656.01Description

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.

656.02Materials

Mulch materials shall be furnished in compliance with the requirements given in Article 860.03. A list of acceptable Hydraulic Mulch products, Mulch Control Netting and Tackifiers (List II-20, “TACKIFIERS, MULCH CONTROL NETTING, AND HYDRAULIC MULCH PRODUCTS”) is given in the ALDOT’s MSDSAR manual.

656.03Construction Requirements

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 the 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 being 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 manufacturer 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 tackifiers 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.

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 producer 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.

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 mm} apart along the axle or shaft. Crimpers shall be specially designed so that by adding weight {mass} or using hydraulic force from the tractor the mulch will be imbedded a minimum of 2 inches {50 mm} into the ground. The diameter of the disks shall be large enough to prevent the axle or shaft from dragging or in any way disturbing the mulch or soil. Under no circumstances shall a disc harrow be used to perform the crimping operation. Hydraulic mulch application shall be performed using equipment designed for this purpose and that is in compliance with the recommendations of the mulch product manufacturer.