#13 - Landscaping Requirements Top Soil

Home Browse Search

City of St. Louis Park TURF ESTABLISHMENT 2020 Page 5 of 7 Seeding shall be performed only during the season(s) of planting associated with the specified seed mixture unless indicated in the plans and specifications or approved by the Engineer in writing. The season(s) of planting are as outlined in MnDOT Specification Section 2575. All seed shall conform to the requirements of the latest seed laws of the State and to the requirements of MnDOT Specification 3876. All seeded areas in drainage swales and/or on slopes 3:1 or greater shall be covered with ECB Category 3B Wood Fiber (MnDOT Specifications 3885) erosion control blanket and staples installed according to manufacturer’s installation instructions as approved by the Engineer. 903.7 NET FREE EROSION CONTROL BLANKET Before installing net free erosion control blankets, the seedbed shall be inspected by the Engineer to ensure it has been properly compacted and fine graded to remove any existing rills. It shall be free of obstructions, such as tree roots, projections such as stones, and other foreign objects. The contractor shall proceed when satisfactory conditions are present. After the area has been properly shaped, per MnDOT specification based on slopes, hydro-seeded, fertilized, and compacted, locate the start of the roll, making sure the roll is facing toward the area to be covered, and then roll out the blanket. Blankets shall be rolled out flat, even, and smooth without stretching the material then anchored to the subgrade. Place the blankets the same day after sowing of the seed on that area. Roll out or lay the blankets without netting on top of hydro-mulch. Roll out blankets flat and parallel or perpendicular to the direction of water flow. Evenly spread the blankets without stretching, allowing the fibers to come in direct contact with the soil over the entire area. Shingle and overlap the edges parallel to water flow by at least 4 inches. Shingle and overlap the edges perpendicular to water flow by at least seven (7) inches. Staple overlaps on slopes at 1½ ft intervals, see MnDOT Table 3885-5 for further stapling information. 903.8 TESTING All testing of materials and densities in this section as directed by the Engineer shall be taken by the Engineer or an independent testing laboratory. Cost of these tests shall be paid by the Owner, except that any retesting of areas that fail to meet specifications shall be paid by the Contractor. 903.9 WATER The Contractor shall work with the City to obtain permits required for obtaining the water required to spray the Turf Establishment Areas. The Contractor shall maintain a log of watering dates and volumes and provide them to the Engineer to review for payment. 904.0 TURF ACCEPTANCE The Contractor shall be solely responsible for Turf Establishment as outlined in the plans and specifications for this project. The Engineer and Contractor shall inspect the turf prior to final closeout. Contractor will be responsible for any and all repairs required to achieve the required vegetative cover.