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LJ -�l SECTION 570 GRASSING (BY SEEDING) • 570-1 Description. Establish.a stand of grass on slopes, shoulders and specified other areas, by seeding or by seeding and mulching. Perform seeding and mulching, fertilizing, and wildflower seed • application as required, and maintain the grassed areas until the completion of the project. The Engineer may eliminate at his discretion, any of the items of work covered by this Section. 570-2 Materials. Meet the following requirements: • Grass Seed ....................................................................981-1 Wildflower Seed981-1 .......................................................... Mulch........................................................................... 981-3 Fertilizer, Type I .................................................Section 982 Water...................................................................Section 983 Compost..............................................................Section 987 • Prior to planting, furnish the Engineer a certification from the grower stating the age of .all seed. • 570-3 Construction Methods. 570-3.1 General: Do not seed or mulch when wind velocities exceed 15 mph. Sow seed only when the soil is moist. Do not perform any seeding when the ground is frozen, unduly wet or otherwise not in a tillable condition. Whenever a suitable length of roadway slopes or adjacent areas has been graded, prepare the area and perform grassing in accordance with the Contract Documents. Incorporate grassing into the project at the earliest practical time. Complete all grassing on shoulder areas prior to the placement of the friction course on adjacent pavement, unless the friction course is to be placed directly on a non -asphalt r base. 570-3.2 Sequence of Operations: Perform the operations in the following sequence: Apply finish soil layer materials in accordance with Section 162, prepare the area to be seeded, seed, spread and cut -in mulch and fertilize. In preparing the ground for sowing of seeds, disk -harrow and thoroughly pulverize the soil to an average depth of 6 inches. Make the soil true to grade, not compacted and free of large clods, roots, and other material which will interfere with the work or subsequent mowing and maintenance operations. Do not begin subsequent operations until the Engineer has approved the condition of the prepared areas. 570-3.3 Seeding: While the soil is still loose, scatter the seed uniformly over the grassing area and immediately mix it into the seed bed to a depth of 1/4 inch using the specified seed. r. Thoroughly dry -mix the separate types of seed immediately before sowing. Do not use wet seed. The Engineer will allow the wildflower seed to be included in the grassing • operation or performed separately from the grass seeding operation in areas shown in the plans. W