04-27-2015 Council Packet - Laserfiche WebLink

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Wetland Buffer Vegetation Management Plan The City of Lino Lakes will establish a minimum 25 foot buffer around wetlands within the designated Wetland Management Corridor (WMC) and associated with the Fire Station and road. The development and maintenance of the buffer areas is described below. Ground Preparation & Seeding Grading within the proposed buffer area will be completed per the attached buffer exhibits. Once the area is graded to the proposed elevations, it will broadcast seeded with Seed Mix 35-241 at a rate of 36.50 lb/ac. If the soil within the proposed planting area is deemed too compact for to allow for water and roots to penetrate into the ground, then the area should be tilled to allow for penetration. Every effort shall be taken to obtain uniform distribution over the seeded area. To offset the fact that native seeds vary in size and weight, the seed mix will be mixed with an inert material for broadcasting. Slightly moistened sand, sawdust, or peat moss should be used as the inert material since they would stick to the seeds resulting in a more even spread, make the seeded area more visible, and help to extend small amounts of seed. Before broadcasting of the seed commences the seed will be divided into two parts. Once divided, the first half of the seed will be broadcast over the entire area while walking in one direction (e.g. north south). Once the first half is spread, the second half will be broadcast while walking perpendicular (e.g. east west) to the first pass. This method will ensure even coverage of the ground and will prevent running out of seed before the entire area is seeded. Seedbed Firming The City shall firm all seeded areas after seeding and prior to mulching. The soil firming shall be done with a roller, cultipacker or other approved soil firming equipment. On slopes too steep to operate mechanical equipment, the seed shall be covered by hand raking or other approved means prior to mulching. Soil firming or seed covering shall occur immediately after seeding. Mulching All buffer areas shall be mulched with Mn/DOT Type 3 MCIA certified mulch at an application rate of 1 ton/acre. The City shall spread by mechanical means (preferably a blower) to provide a uniform distribution at the target application rate specified. If poor mulch distribution occurs, the Contractor will be required to re - mulch areas where coverage is too light and remove the excess where coverage is too heavy as determined by the engineer. Mn/DOT Type 3 Mulch — Type 3 mulch shall consist of clean grain straw (i.e., oats, wheat) that is certified by the Minnesota Crop Improvement Association (MCIA) to be free of noxious weed seeds, seed bearing stalks, and/or other reproductive propagules as defined by rules and regulations of the Minnesota Department of Agriculture. Documentation verifying that the mulch has passed MCIA field inspection shall accompany the material upon delivery to the job site. At the time of delivery, all mulch shall be in air dried condition.