1600 121ST ST SE 2016-01-01 MF Import

native olants. Phase 11 - The new wetland would be excavated to the height of the top of bank of Silver Lake Creek channel. Annual ryegrass would be planted at 15 Ibs./acre and willow cuttinps would be planted at 2 foot spacing. A garage and shed would be removed from the wetland buffer area. The disturbed area and a 37-1/2 foot buffer would be planted with native trees and shrubs in a random triangular spacing pattem. The 25 toot bufier for the outflow from Silver Lake will have an enhanced buHer uf 25 feet, with proposed species listed in the mitigation plan dated June 25, 1992. Additional Wetland Mitiaation Reauirements Development of the site must be in confortnance with the proposed mitigation plans and the foilowing modifications and additional conditions� A. Phase I : 1. A 35 foot buHer is weUand on the site. the 35 foot bufter. 3. required around the entire perimeter of the central A lafoot building setback must be provided outside A wetland at the southeast portion of the site would remain undisturbed. A 50 foot buffer is required adjecent to the wetland and a 10 foot building setback must be provided outside the 50 foot buHer. The surface blanket of organic soils placed in the new wetiand areas must be a minimum of 8 inches deep. The buNer enhancement adjacent to wetland #1 and wetland #2 and proposed wetland plantings must inGude the following species substitutions: a. Rather than holly, the following species shall be planted: nootka rose (Rosa nutkana), hezelnut, ninebar4c and vine maple. These should be planted in equal numbers to total 180. Mock orange (Philadelpf�us lewisii) may nat be used, since it is generally �ound in dry Gearings of Douglas fir forests. Physocarpus capitatus (ninebartc), or another species approved by the Planning Department, shall be used instead. b. Rather than hardhack, an equal number of hardhack and redstem dogwood shell be provided; and c. Rather thnn soR rush the plantings must inGude bullrush (Scirpus microcs�pus), slough sedge (Carex obnupta), spike rush (Eleocharis spp.), and/or sawbeak sedge (Carex sbpata). d. Populus tricocarpa (Black cottonwood) should be planted along the southem and eastem wetland area. There are a number of seedlings and saplings already coming up in the southem area, a number of which could be used for Vansplanting to other portions of the wetland and stream cortidor. In addition, cutting from the existlng Salix sp, should be used to vepetete the open areas within the eastem wetland cortidor. e. To minimize erosion in Geared areas, either appropriate native Exnnu 5 - v -` OF �g.