02-23-2004 Council Packet - Laserfiche WebLink

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Wetland & Bnffcr Seeding Flan The following seeding plan utilizes elements and recommendations from the Seeding Manual of MnDOT Office of Environmental Services, Turf Establishment and Erosion Control Unit, Draft Year 2000. Preparation and Seediny I. The smooth-graded wetland and buffer areas designated for seeding should be prepared by loosening topsoil to a minimum depth of 3 inches. The designated upland buffer areas • that have not b^ graded and contain existing vegetation should be prepared by mowing at a height of 4-6 inches in late April/earfy May or late August/early September. The grass should be allo^ to re-grow before herbicide application (1-3 weeks). Recommen ded herbicide rates are 2 quaits/acre of glyphosate and 1-2 quarts/acre of 2,4- D. The soil can then be loosened and seeded 7-10 days after herbicide treatment. 2. Seeding should be conducted either April 15-July 20 or Sept. 20-October 20. Seeding can be accomplished by broadcast or drilling. Broadcast seeding is particularly rewmtMnded for the wetland seed mixture unless the weather is hot and dry and/or the soil moisture content is low at the time of seeding. Broadcast seeding should by acconq)lished by u» of any type of broadcast seeder capable of broadcasting the seed evenly over the entire area. Seed should be mixed thoroughly prior to seeding and should be n^d occasionally in the spreader to prevent separation and settling. If the drill sec<^ method is used, seed should be installed with a Tniax-type seed drill containing a minimum of 2 seed boxes (fine seed box & box for large/flu% seeds) and equipped with disc funow openers and packer assembly to compact the soil directly over the drill rows. Maximum row spacing should be 8 inches. Small and fine seeds should be drop-seeded onto the surfiwe from the fine seed box, and large/fluflfy seed should be placed to obtain a final planting depth of 54-V4 inches. All drill seeding should be done at a right «n£i^ m su^e drainage. Recommended seeding rates arc given for the buffer and wetland seed mixtures at the end of this plan. 3. The seeded a^ should be harrowed or raked following seeding. The areas should then be pack^ usmg a cultqyacker or equivalent. Packiiig will be considered adequate when only a slight footprint is left in the soil after walking across the area. 4. Following packing, the areas should be mulched and disc-anchored at a rate of 2 tons/acre using MCIA certified weed free mulch, MnDOT Type 7 or 8 prairie hay/mulch, or MnDOT Type 1 clean straw mulch. ^ ^ ! •Maintg^a pce and Evaluation of Seeding Succggg Year 1 (spring seeding) • Prepare and seed site April 15-July 20 • Mow to a height of 6-10 inches July 20-August 20 • Optional mowing in early September • Spot spray weedy ^cies such as thistles * i • >