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City of St. Louis Park TURF ESTABLISHMENT <br />2020 Page 4 of 7 <br />  <br />903.3 TOPSOIL <br />Submit a list of prospective sources for topsoil material to the Engineer at the preconstruction <br />meeting to allow for inspecting, testing, and approving the sources. Submit preapproval test <br />results to the Office of Environmental Stewardship, Erosion & Stormwater Management Unit. If <br />federal or state chemical or biological requirements conflict, provide material meeting the most <br />stringent requirement. <br />Test blended topsoil for each individual component before blending. <br />Fertility testing will be in accordance with the standard testing procedures of the University of <br />Minnesota Soils and Testing Laboratory, Soil Science Department. <br />903.4 FERTILIZING TURF AREAS <br />A soil test shall be taken and commercial fertilizer shall be applied and raked in at the rate <br />recommended for the Loam Topsoil Borrow provided for the areas identified for turf <br />establishment. <br />Fertilizer application shall be per manufacturer's printed instructions. <br />Fertilizer must be dry and free flowing when applied. Caked or deteriorated materials will not be <br />permitted. <br />Where liming is required, it shall be applied prior to sodding, and the soil shall be tilled at least <br />once within 24 hours following the liming and prior to the sodding. <br />903.5 SODDING <br />Areas to be sodded shall be brought to within thickness of sod of finish grade. Allowance for <br />settlement shall be made. <br />Sod strips shall be placed tightly against each other so no open joints are apparent. Joints <br />between ends of strips shall be staggered at least one (1) foot between adjacent rows. At the edge <br />of walks, curbs, and drives, sod shall have the same finish grade as hard surfaced area. Sod shall <br />be laid so water from adjacent areas will have free flow onto sodded area. Light rolling of sod <br />will be required to achieve smooth planes and so no void occurs between sod and subsoil. Edges <br />of sod where rolls abut each other or another material shall be cut, not torn. <br />Sod covering drainage swales and on slopes steeper than three (3) to one (1) shall be held in place <br />by wooden stakes driven through the sod into subsoil until flush with top of sod or by other <br />approved method to hold sod in place. <br />Sod areas shall be fertilized, watered, and mowed, if necessary, to assure that sod areas are <br />uniformly moistened and maintained in a moist condition for a minimum of thirty (30) growing <br />days or until sod work has been approved by final acceptance and responsibility for maintenance <br />accepted by the Engineer. <br />903.6 SEEDING <br />Seed application rate is 150% of MnDOT’s recommended rate. <br />Seeding shall be applied by a Hydroseeder as described in MnDOT specification section 2575. <br />Firming the seedbed with a corrugated cultipacker or other approved method will be required.