01-11-1988 - Agenda Packet City Council - regular meeting

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test. The site shall be reasonably smooth and free of debris such as rocks, roots or tree branches before seeding. 3.9 The seed sha3 be spread uniformly on the surface. Broadcasted seed shall have an approximate earth cover from 1 /8 inch to 1 /4 inch (between 1 /2 and 1 inch on most sands) by dragging or hand raking before the mulch is applied. a. Broadcasting - Seed shall be uniformly distributed by a mechanical or hand operated seeder Cover the seed by cultipacking, harrowing or hand raking. b. Hydroseeding - Apply the seed alone or seed and fertilizer in slurry form uniformly over the area. Hydroseeders shall arovide continuous agitation and be capable or supplying a continuous, ion-fluctmating flow of slurry. Cover the seed by cultipacking, harrowing or hand raking. 3.10 Mulc;iing shr.ii be done immediately after the seed is sown. The mulch shall consist of clean hay, straw, or long fibered wood cellulose blown or hand applied at a rate of 3,000 to 4,000 lbs. per acre for hay and straw, or 1,500-2,000 Ibs./ ac. for the wood cellulose. The contractor will provide a method satisfactory to the engineer for determining the weight of mulch furnished. 3.1 1 On siopes steeper than 3:1, the mulch shall be anchored by a netting securely stapled into place. The netting shall be a Mack polypropylene extruded rectangular mesh with 3/4" x 1" opening and having a weight cf 2.6 pounds per 1,000 square feet (4- 0.5 Ibs.). Netting shall be equivalent to Economy Erosion Control Netting from Conwed Corporation, 332 Minnesota Street, St. Paul, MN 55101. All stetting will be secured by staples on 4 to 5 foot staggered centers, except on the ends of the netting where staples will be placed at 1 to 2 foot spacings along the entire width. Adjacent or end to end nets will have a 4-6 inch overlap with the net on the upstream side of any lateral water flow on top. Staple will be 1" by 6" long, 11 gauge wire staples it ,serted flush with mulch or ground surface. 3.12 When construction is—mriated between May 15 and July 1 and August 1 and September 15 all sites will be s;.::.ed to the perrr:a.,ent mixture listed in 3.7. No dormant seedings will be made when using this permanent mixture. If construction is completed during the period of September 15 to November 1, the area will be seeded with a temporary seeding consistirg of 10 pounds per acre perennial ryegrass planted with a grass drill or hand seeded and harr,:wed. After these dates a dormant stedirg may ba made.