#13 - Landscaping Requirements Top Soil - New Text Color

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City of St. Louis Park TURF ESTABLISHMENT 2020 Page 3 of 7 25-142 April 1- Sept. 1 N/A Any seed mix that beginning with at "3" April 15 - July 20 Sept. 20 - Oct. 20 Adjustments to growing dates may be modified by no more than 10 calendar days by the Engineer based on weather conditions. Provide temporary stabilization when outside the season of planting dates of the specified permanent seed mixture. A full warranty period is required to ensure proper vegetation establishment and longevity. A 45 day maintenance period is required for all seeded areas. For seed that is planted after November 1, the 45 day maintenance period will not begin until the following April 15 and will continue for the full 45 days. If the Contractor chooses to temporarily stabilize the areas to be seeded after November 1 instead of completing the final stabilization process, the Contractor may submit a temporary stabilization plan to the Engineer defining the temporary stabilization plan, to include erosion and sediment controls, schedule, and a maintenance plan. The costs to implement a temporary stabilization plan after November 1 will be considered incidental to this Contract. A 30 day maintenance period is required for sod which shall not include days between November 1 and April 15. 903.2 GROUND PREPARATION Topsoil shall be placed no more than five (5) working days before placement of sod or seed. All areas disturbed by construction outside of paved areas shall be excavated to a depth of six (6) inches, and tilled to a depth of six (6) to twelve (12) inches to remove compaction, unless otherwise indicated. Distribute only stockpiled and/or designated select topsoil borrow over the areas to be sodded or seeded to provide the specified depth of cover for the areas shown on the plans to be sodded and bring the entire site to grade. The depth of topsoil cover shall be six (6) inches, unless otherwise indicated. Areas shall be worked until soil is completely fined and in a mellow condition to finish grade. Holes, depressions, and rivulets shall be filled in and brought to a smooth grade. All sticks, branches, stones, or other debris on the surface over two (2) inch in size shall be picked up and removed. No heavy equipment except lawn rollers shall be moved over turf areas after soil has been prepared, unless soil is again graded and loosened as specified above. Grades not otherwise indicated shall be uniform between points where elevations are given or between such points and finish grades. The maximum slope shall be no steeper than one (1) vertical to three (3) horizontal. Abrupt changes in slopes shall be rounded. All holes, depressions, and rivulets shall be filled and brought to a smooth grade. All areas shall be graded to drain to the street or to a drainage structure. If the placed topsoil is compacted, the topsoil shall be loosened to a minimum depth of six (6) inches using disks, harrows, field diggers, or other suitable cultivating equipment.