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Hydro Seeding <br /> A. Description - This item consists of the seeding of steeper grades matching the remaining hill <br /> using the hydro seeding materials, equipment and seed specified herein. <br /> B. Methods- Seeding operations shall use a mechanically-agitated hydro seeder with a minimum <br /> tank size of 500 gallons. Pump-agitated hydro seeders will not be allowed. <br /> Seed shall be applied at the combined rate of 23.375 pounds per acre (approximately 8.6 ounces <br /> per 1000 square feet) for native seed and cover crop, using 2,000 pounds of hydro mulch per <br /> acre. Seeding and mulching rates may be higher in specific areas if so directed by the engineer. <br /> The seed mixture, mulch and water shall be placed into the machine's tank in sufficient quantities <br /> that when the contents of the tank are sprayed on a given area the seed will be uniformly spread at <br /> the required rate of application in a one-step operation. During the process, the contents of the <br /> tank shall be kept stirred to provide uniform distribution of the seed and mulch. The contents of <br /> the tank shall be emptied within one hour after the seed is added to the tank. Seed which is <br /> allowed to remain mixed with the water for longer than one hour will be rejected. <br /> Hydro seeding shall not be applied before, during or immediately after rainfall so that the matrix <br /> will have 24 hours to cure and dry after installation. In dry weather, hydro seeding operations <br /> shall begin as early as possible each morning to allow time for drying prior to nightfall. <br /> C. Materials- The following seed and mulch materials shall be used: <br /> Native Seed <br /> Grasses lbs/Acre % purity % germ. <br /> Andropogon gerardi (Big bluestem) 2.5 85 60 <br /> Schizachyrium scoparium (Little bluestem 1.0 75 60 <br /> Sorghastrum nutans (Indian grass) - 2.5 90 60 <br /> Bouteloua curtipendula (Side-oats grama) 1.0 90 60 <br /> Forbs oz/Acre % purity % germ. <br /> Rudbeckia hirta (Black-eyed susan) 1 97 60 <br /> Liatris aspera (Rough blazing star) 2 95 60 <br /> Solidago rigida (Stiff goldenrod) 1 97 60 <br /> S. speciosa (Showy goldenrod) 1 97 60 <br /> Aster azureus(Sky-blue aster) 1 90 60 <br /> Helianthus laetiflorus (Showy sunflower) 3 97 60 <br /> Lespedeza capitata (Bush clover) 4 97 60 <br /> Lupinus perennis (Lupine) 4 97 60 <br /> Ratibida pinnata(Yellow coneflower) 2 97 60 <br /> Silphium laciniatum (Compass plant) 4 85 60 <br />