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03/09/00 2.04 MULCH A. Straw Mulch: 1. Delivered and stored to be kept dry. 2. Mulch shall conform to MNDot Specification 3882, Type 7B PART 3 - EXECUTION 3.01 INSPECTION A. Verify that soil preparation and related preceding work have been completed. 3.02 SITE PREP ARA TION FOR NATIVE GRASS/WTTJDFLOWER SEEDING A. Prior to beginning excavation activities for this project, existing vegetation within the property boundaries should be treated with a tank mix of RoundUp@ Herbicide at a rate of 5 pints per acre and Ammonium Sulfate at 3 Ibs./acre to eliminate exotic competition. In lowland areas or any area that may negatively affect an existing wetland community through the use of this herbicide mixture shall be sprayed with Rodeo@ herbicide at the manufacturer's recommended rate. This work shall be done as soon as existing vegetation begins active growth, in the spring of the season around May 15. After treatment wait seven days before excavation and construction activities begin. B. Following the completion of final grade work and prior to seeding, clear, any growth of volunteer weeds within the seeding areas with a solution ofRoundUp@ Herbicide at 3 pints per acre and Ammonium Sulfate at 3 Ibs./acre. ~ In lowland areas or any area that may negatively affect an existing wetland community through the use of this herbicide mixture shall be sprayed with Rodeo@ herbicide at the manufacturer's recommended rate. Following the spray application wait a minimum of 7 days before disturbing the site with other procedures. C. All holes, depressions and rivulets shall be filled in and brought to a smooth finish grade. D. The areas to be seeded shall be worked with a tillage implement (disk, field cultivator, pre- seeder) to a depth of 4 inches. Tillage should be followed by packing or harrowing to create a firm fine textured seed-bed. 3.03 SEEDING- A. Native plant community seedings during two periods of the year. The first is spring from the time site preparation work is concluded in the spring, until approximately July 20. In the fall dormant seeding between September 20 and Freeze-up. Dormant seedings do not germinate until the following growing season when soil t ~mperatures reach approximately 65 degrees F. If the final grade work is completed during a perIod of time between July 20 and September 20, a temponirycover crop of oats .or winter wheat should be sown to stabilize the site until an acceptable time arrives when native grasses and wildflowers can be safely seeded. B. All native grass seed should be sown using a Truax @ Native Grass Drill. In areas too tight for equipment, grass seed can be broadcast by hand or with a mechanical spreader. NATIVE GRASSES & WILDFLOWERS 02935-3