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Edgewater Creek Bridge Replacement November 2023 159 (Agrostis alba) 1 2 Red fescue 70 98 90 3 (Festuca rubra) 4 5 White dutch clover 10 98 90 6 (Trifolium repens) 7 8 The rate of application shall be 5 pounds per 1,000 square feet and shall have 9 a minimum germination rate of 90%. Seed shall be optimally applied before 10 September 15th to establish cover before winter unless otherwise approved by 11 the Engineer: 12 13 8-02.GR8 14 Roadside Restoration 15 16 8-02.2.GR8 17 Materials 18 19 8-02.2.INST1.GR8 20 Section 8-02.2 is supplemented with the following: 21 22 8-02.2(9-14).GR8 23 Erosion Control and Roadside Planting 24 25 8-02.2(9-14.5).DOCX 26 Mulch and Amendments 27 Section 9-14.5 is supplemented with the following: 28 29 8-02.2(9-14.5).OPT1.DOCX 30 (******) 31 Arborist Wood Chip Mulch 32 Arborist Wood Chip Mulch (AWCM) shall be coarse ground wood chips 33 (approximately 1/2” to 6” along the longest dimension) derived from the mechanical 34 grinding or shredding of the above-ground portions of trees. It may contain wood, 35 wood fiber, bark, branches, and leaves, but may not contain visible amounts of soil. 36 It shall be free of weeds and weed seeds. 37 38 Including but not limited to plants on the Snohomish County Noxious Weed list 39 available at: 40 http://www1.co.snohomish.wa.us/Departments/Public_Works/Divisions/Road_Maint41 /Noxious_Weeds/weeds_list.htm, 42 Mulch shall be free of invasive plant portions capable of re-sprouting, including but 43 not limited to horsetail, ivy, clematis, knotweed, etc. It may not contain more than 44 1/2% by weight of manufactured inert material (plastic, concrete, ceramics, metal, 45 etc.). 46 47 AWCM, when tested, shall meet the following loose volume gradation: 48 49 Percent Passing 50 Sieve Size Minimum Maximum 51