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• <br /> +• SECTION 570 <br /> GRASSING (BY SEEDING) <br /> • 570-1 Description. <br /> Establish. a stand of grass on slopes, shoulders and specified other areas, by seeding or by <br /> seeding and mulching . Perform seeding and mulching, fertilizing, and wildflower seed <br /> • application as required, and maintain the grassed areas until the completion of the project. <br /> The Engineer may eliminate at his discretion, any of the items of work covered by this <br /> Section. <br /> 570-2 Materials. <br /> Meet the following requirements: <br /> • Grass Seed . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . .. . . . .. . . . . . .. .. . . .. . 981 - 1 <br /> Wildflower Seed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 981 - 1 <br /> Mulch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . . . . . . . . . . .. . . . . . .. 981 -3 <br /> Fertilizer, Type I . . . . . . . . . . . ... . . . . . . . . . .. . . .. . . . . .. . . . . . .. .. . . .. . Section 982 <br /> Water. . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . ... . . . . . . . . . . . . . .. . . . .. . . Section 983 <br /> Compost . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . . . . . . . . . . . . . . . Section 987 <br /> • Prior to planting, furnish the Engineer a certification from the grower stating the age of <br /> .all seed. <br /> • 570-3 Construction Methods. <br /> 570-3 . 1 General: Do not seed or mulch when wind velocities exceed 15 mph. Sow seed <br /> only when the soil is moist. Do not perform any seeding when the ground is frozen, unduly wet <br /> or otherwise not in a tillable condition. <br /> Whenever a suitable length of roadway slopes or adjacent areas has been graded, <br /> prepare the area and perform grassing in accordance with the Contract Documents . Incorporate <br /> grassing into the project at the earliest practical time. <br /> Complete all grassing on shoulder areas prior to the placement of the friction <br /> r <br /> course on adjacent pavement, unless the friction course is to be placed directly on a non-asphalt <br /> base. <br /> 570-3.2 Sequence of Operations : Perform the operations in the following sequence: <br /> Apply finish soil layer materials in accordance with Section 162, prepare the area to be seeded, <br /> seed, spread and cut-in mulch and fertilize. <br /> In preparing the ground for sowing of seeds, disk-harrow and thoroughly <br /> pulverize the soil to an average depth of 6 inches. Make the soil true to grade, not compacted and <br /> free of large clods, roots, and other material which will interfere with the work or subsequent <br /> mowing and maintenance operations. Do not begin subsequent operations until the Engineer has <br /> approved the condition of the prepared areas. <br /> 570-3.3 Seeding: While the soil is still loose, scatter the seed uniformly over the grassing <br /> area and immediately mix it into the seed bed to a depth of 1 /4 inch using the specified seed. <br /> r. Thoroughly dry-mix the separate types of seed immediately before sowing. Do <br /> not use wet seed. <br /> The Engineer will allow the wildflower seed to be included in the grassing <br /> • operation or performed separately from the grass seeding operation in areas shown in the plans . <br /> r <br />