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    SECTION 02935

    TOPSOIL, SEEDING AND SODDING

   PART 1 - GENERAL

   1.01 SUMMARY

    Provide all labor, materials, tools and equipment as required to have topsoil, fertilizer, lime, mulch, and seed applied on all areas disturbed by construction.

   1.02 RELATED SECTIONS

    A. Section 01710: Cleanup and Restoration

    B. Section 02223: Backfilling

    C. Section 02660: Water Distribution System

    D. Section 02730: Sanitary Sewerage System

   PART 2 - PRODUCTS

   2.01 MATERIALS

    A. Topsoil

    B. Seed

    Grass seed shall consist of and be sown at the rate of forty (40) pounds of Kentucky Bluegrass, ten (10) pounds of red top, ten (10) pounds of white clover and ten (10) pounds of farm rye per acre. Oats shall be substituted for rye if seed is sown in the spring.

    C. Straw

    D. Sod

    Sod shall consist of live, dense, well rooted growth of permanent grasses, free from Johnson grass, Nut grass, and other obnoxious grasses, of suitable character for the purpose intended and for the soil in which it is to be planted. It shall be uninjured at the time of planting. Sod must be free of weeds, bind weeds, or other matter which has a tendency to kill the grass.

    Sod for area sodding shall be at least 8" wide and 12" long and shall have a reasonably uniform thickness of at least 3".

    E. Fertilizer

    Fertilizer shall comply with the requirements of Subsection 918.15 of the Tennessee Department of Transportation Standard Specifications for Road and Bridge Construction (1981) and shall be Grade 10-10-10, unless otherwise indicated. Agricultural limestone shall conform to the requirements of Subsection 918.17 of the above Standard Specifications.

   PART 3 - EXECUTION

   3.01 INSTALLATION

    A. Topsoiling and Seeding

    This shall include the separation and redepositing of topsoil, final grading, raking, fertilizing, seeding and strawing of trenches and areas disturbed by construction operations across public and/or private property.

    Where directed in writing by the Engineer after completion of cleanup and backfill operations, the Contractor shall topsoil, grade, rake, fertilize, seed and straw all trench lawns and grass areas disturbed by construction operations.

    Topsoil may be the top soil originally excavated from the area and separated from the common excavation for redepositing under this item if suitable soils are encountered or topsoil obtained off the site of work from other sources by the Contractor and satisfactory to the Engineer. All arrangements and expenses for securing, loading, hauling and spreading topsoil shall be by the Contractor.

    The topsoil shall be deposited and spread to a minimum finished depth of at least four (4) inches.

    When the topsoil has been placed to the required depth, the area shall be final graded to blend in and to the contour of the original ground surface. The surface shall then be fine raked to remove all vegetable matter, stones, or other objectionable material and leveled and smoothed ready for fertilizing.

    At least forty-eight (48) hours before sowing any seed, commercial fertilizer shall be uniformly spread over the top soil at the rate of eight hundred (800) pounds per acre by a mechanical spreader and mixed into the soil for a depth to two (2) inches. The area shall then be lightly raked and/or harrowed until the surface of the finished grade is smooth, loose and pulverized.

    Grass seed shall then be sown by a mechanical spreader operating in two directions and lightly raked. The Contractor shall use care in raking not to destroy the finished grade or disturb the distribution of seed. The seeded area shall be thoroughly watered with a fine spray in such a manner as not to wash out the seed. Sowing of seed shall be done only within the seasons extending from March 1 to June 1 and August 1 to November 30.

    B. Topsoiling and Sodding

    The sodding operations shall be limited to March 1st through October 1st, unless weather and soil conditions are considered favorable and permission is granted by the Engineer.

    All sod shall be planted only when the soil is moist and otherwise favorable to growth.

    The surface shall contain not less than one foot of topsoil and be loosened to a depth of not less than 3" and raked to remove any lumpy materials.

    As necessary, the soil shall be sprinkled until saturated at least 1" in depth and kept moist until the sod is placed thereon. Immediately before placing sod, fertilizer and lime shall be applied uniformly to the prepared surface of the ground. Fertilizer shall be applied at the rate of 12 pounds of Grade 10-10-10, or equivalent, per 1,000 square feet. Agricultural limestone shall be applied at the rate of 100 pounds per 1,000 square feet.

    Sod shall be placed on the prepared surface with the edges in close contact and, so far as possible, in a position to break joints. Each piece of sod laid shall be fitted in the space and shall be rolled or hand tamped to the satisfaction of the Engineer.

    The sod shall be maintained moist from the time of removal from the point of origin until placed, and shall be placed as soon as practicable after removal from the place where it was growing.

    On steep slopes, or where necessary, pinning or pegging will be required to hold the sod in place.

    All areas seeded shall be covered with a light covering of straw approximately one-fourth inch (1/4") in depth.

   3.02 MAINTENANCE

    The seeded areas shall be watered, maintained and patched as necessary until the Contractor's work is completed and he leaves the site and/or a suitable stand of grass is obtained.

    The sod shall be watered for a minimum period of two weeks after setting. The Contractor shall not allow any equipment or material on any planted area and shall erect barricades and guards, if necessary, to prevent his equipment, labor, or the public from traveling on or over any planted area.

    It shall be the obligation of the Contractor to mow and maintain the grassed areas and to secure an acceptable growth of grass before final acceptance of the Project.

    END OF SECTION