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SECTION 31 <br />EROSION CONTROL <br /> <br />31-01 <br /> <br />31-02 <br /> <br />31-03 <br /> <br />31-04 <br /> <br />31-05 <br /> <br />Scope. The work covered by this section includes furnishing all <br />materials, work and equipment necessary to provide vegetative erosion <br />control planting of the channel, roadside "V" ditches and adjacent cut <br />and fill banks, swales, graded or disturbed areas. <br /> <br />Types of Erosion Control <br /> <br />Type I erosion control is non-irrigated punched straw. <br /> <br />Type 2 erosion control is non-irrigated hydroseeding. <br /> <br />Type i erosion control shall be used on the bottom of the new channel <br />and the side slopes to a minimum vertical height of 4 feet. <br /> <br />All other areas maY be either Type I or Type 2. <br /> <br />Preparation of Surface. The area to be ~eeded shall have a firm seedbed <br />that has previously been roughened by scarifying, disking, harrowing, <br />chiseling or track-walking, or otherwise worked to a depth of 2 inches <br />unless a roughened condition already exists. No implement shall be used <br />that will create an excessive amount of downward movement of soil or <br />clods on sloping areas. The seedbeds may be prepared at the time of <br />completion of earth-moving work. <br /> <br />Erosion control shall be not applied to slopes with excessive depths of <br />loose uncompacted material, in the opinion of the Engineer, until such <br />material is acceptably compacted. <br /> <br />Timin9. The work shall be completed prior to October 1, 1986. <br /> <br />Materials and Application <br /> <br />a. Seed <br /> <br />Seed Tspe <br /> <br />Minimum Application Rate <br />(pounds per acre) <br /> <br />'Blando brome 30 <br />Annual ryegrass 20 <br /> <br />All seed shall be delivered to the site tagged and labeled in <br />accordance with the California Agricultural Code and shall be <br />acceptable to the County Agricultural commission. <br /> <br />CDS.1.20 31-1 <br /> <br /> <br />