739.01 DESCRIPTION. Prepare seed beds and sow grass seed utilizing
hydro-seeding equipment and methods in order to establish a turf grass cover to areas designated on the plans or as directed.
739.02 BED PREPARATION. Prepare seed beds in accordance with
739.03 HYDRO-SEEDING GENERAL. Hydro-seeding consists of
mixing and applying seed, commercial fertilizer, lime, polyacrylamide tackifier, and mycorrhizal inoculum with paper or wood fiber and water. Uniformly spread seed and commercial fertilizer over the area at the rates specified in Table 717-1 and Table 718-1. Mix and apply paper or wood fiber with the seed in accordance with the manufacturer’s recommendations and as approved by the engineer. Fertilizer and lime may be included in the seeding slurry for application during hydro-seeding operations. All of these materials may be included in a single manufacturer’s hydro-seeding system. Use Approved Materials List systems. Determine the application rate for pellet-inoculated seed by using the seed mass exclusive of inoculant materials. Mix the materials with water according to the manufacturer’s specifications. Mix the materials in a tank with a built-in continuous agitation system with sufficient operating capacity to produce a homogeneous mixture, and with a discharge system that will apply the mixture at a continuous and uniform rate. Provide a tank with a minimum capacity of 962 gallons . The engineer may authorize use of equipment of smaller capacity if it is demonstrated that the equipment is capable of performing all operations satisfactorily. A dispersing agent may be added to the mixture provided evidence is furnished showing that the additive will not affect germination. Do not use any material considered detrimental, as determined by the engineer. Do not apply any mixture containing polyacrylamide tackifier during rainy weather, or when soil temperatures are below 41°F, or if the wind speed is above 20 miles per hour. Do not permit pedestrian traffic or equipment to enter areas where hydro-seeding has been applied. Prior to planting, the engineer will contact the Department’ s Roadside Development Coordinator to select the varieties of seed to be used.
739.04 MEASUREMENT. Quantities for hydro-seeding will be
measured by the acre.
739.05 PAYMENT. Payment for hydro-seeding will be made at the
contract unit price per acre and shall include the seed, mulch, tackifier, lime, fertilizer, water and bed preparation as a system and all labor and equipment necessary to complete the work. Payment will be made under: Item No. Pay Item Pay Unit 739-01 Hydro-Seeding Acre
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